WO2025043728A1 - Communication method, first terminal, second terminal and communication system - Google Patents

Abstract

The present disclosure relates to a communication method, a first terminal, a second terminal and a communication system. The method comprises: selecting a second carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, and the first service is a broadcast service or a multicast service; and sending sidelink data by means of the second carrier, wherein the sidelink data is associated with the first target address. Thus, for a broadcast/multicast service, a sending terminal can select a second carrier from a first carrier supported by a first target address associated with a service, and preferentially use the second carrier to send sidelink data, so that the loss rate of data packets can be reduced, thereby improving communication quality.

Description

Communication method, first terminal, second terminal, communication system Technical Field

The present disclosure relates to the field of communication technology, and in particular to a communication method, a first terminal, a second terminal, and a communication system.

Background Art

In order to meet the requirements of single-user peak rate and system capacity improvement, the system transmission bandwidth can be increased, such as by using carrier aggregation

(carrier aggregation, CA), SL communication can use carrier aggregation.

Summary of the invention

The method disclosed in the present invention can be used to solve the technical problem of "for broadcast and multicast services, if the terminal capability is limited, how to determine the carrier used for carrier aggregation".

The embodiments of the present disclosure provide a communication method, a first terminal, a second terminal, and a communication system.

According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is performed by a first terminal. The method includes:

Selecting a second carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, and the first service is a broadcast service or a multicast service;

Sidelink data is transmitted via the second carrier, the sidelink data being associated with the first target address.

According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, which is performed by a second terminal. The method includes:

Selecting a fourth carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, the first service is a broadcast service or a multicast service, the fourth carrier is partially or completely the same as the second carrier, and the second carrier is a carrier selected by the first terminal from the first carrier;

Sidelink data is received over a fourth carrier, the sidelink data being associated with the first target address.

According to a third aspect of an embodiment of the present disclosure, a first terminal is provided, including:

a processing module, configured to select a second carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, and the first service is a broadcast service or a multicast service;

A transceiver module is used to send side link data through the second carrier, and the side link data is associated with the first target address.

According to a fourth aspect of an embodiment of the present disclosure, a second terminal is provided, including:

a processing module, configured to select a fourth carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, the first service is a broadcast service or a multicast service, the fourth carrier is partially or completely the same as the second carrier, and the second carrier is a carrier selected by the first terminal from the first carrier;

The transceiver module is used to receive sidelink data through a fourth carrier, where the sidelink data is associated with the first target address.

According to a fifth aspect of an embodiment of the present disclosure, a communication device is provided, including:

one or more processors;

Wherein, the communication device is used to execute the communication method described in the embodiment of the first aspect.

According to a sixth aspect of an embodiment of the present disclosure, a communication device is provided, including:

one or more processors;

Wherein, the communication device is used to execute the communication method described in the embodiment of the second aspect.

According to the seventh aspect of the embodiments of the present disclosure, a communication system is proposed, including a first terminal and a second terminal, wherein the first terminal is used to execute the communication method described in the first aspect embodiment, and the second terminal is used to execute the communication method described in the second aspect embodiment.

According to the eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the communication method as described in any one of the first aspect and the second aspect.

In the disclosed embodiment, for a broadcast service or a multicast service, the first terminal can select a second carrier from the first carrier corresponding to the first target address associated with the service, and send the sidelink data associated with the first target address through the second carrier. Thus, for a broadcast multicast service, the sending terminal can select a second carrier from the first carrier supported by the first target address associated with the service, thereby determining the carrier used for carrier aggregation, and preferentially using the second carrier to send the sidelink data, which can reduce the loss rate of data packets and improve communication quality.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

FIG2 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure;

3A-3D are flowchart diagrams of a communication method according to an embodiment of the present disclosure;

4A-4D are flowchart diagrams of a communication method according to an embodiment of the present disclosure;

FIG5 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure;

FIG6A is a schematic diagram of the structure of a first terminal provided in an embodiment of the present disclosure;

FIG6B is a schematic diagram of the structure of a second terminal proposed in an embodiment of the present disclosure;

FIG7A is a schematic diagram of the structure of a communication device proposed in an embodiment of the present disclosure;

FIG. 7B is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure.

DETAILED DESCRIPTION

The embodiments of the present disclosure provide a communication method, a first terminal, a second terminal, and a communication system.

In a first aspect, an embodiment of the present disclosure provides a communication method, which is performed by a first terminal, and the method includes:

Selecting a second carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, and the first service is a broadcast service or a multicast service;

Sidelink data is transmitted via the second carrier, the sidelink data being associated with the first target address.

In the above embodiment, for a broadcast service or a multicast service, the first terminal can select a second carrier from the first carrier corresponding to the first target address associated with the service, and send the sidelink data associated with the first target address through the second carrier. Thus, for a broadcast multicast service, the sending terminal can select a second carrier from the first carrier supported by the first target address associated with the service, thereby determining the carrier used for carrier aggregation. The second carrier wave is used to send the side link data preferentially, which can reduce the loss rate of data packets and improve the communication quality.

In combination with some embodiments of the first aspect, in some embodiments, selecting the second carrier from the first carrier corresponding to the first target address includes:

The second carrier is selected from the first carrier according to the priority of the first carrier.

In the above embodiment, the first terminal can select a high-priority carrier as the second carrier, thereby preferentially using the high-priority carrier to send side link data associated with the first target address, thereby avoiding the problem of data packet loss due to limited terminal capabilities, thereby reducing the data packet loss rate and improving communication quality.

In combination with some embodiments of the first aspect, in some embodiments, selecting the second carrier from the first carrier corresponding to the first target address includes:

The second carrier is selected from the first carriers according to a default carrier among the first carriers.

In the above embodiment, the first terminal can use the default carrier in the first carrier as the second carrier, and preferentially use the default carrier to send side link data associated with the first target address, thereby avoiding the loss of data packets due to limited terminal capabilities, thereby reducing the data packet loss rate and improving communication quality.

In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

receiving configuration information sent by a high layer of the first terminal; wherein the configuration information includes a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address;

Determine, according to the configuration information, a third carrier corresponding to the first target address;

A first carrier corresponding to the first target address is determined according to the third carrier corresponding to the first target address.

In the above embodiment, the first terminal can determine the third carrier corresponding to the first target address based on the mapping relationship between the first service and the third carrier configured by the high-level configuration and/or the mapping relationship between the first service and the first target address, and determine the first carrier corresponding to the first target address based on the third carrier corresponding to the first target address, thereby improving the accuracy of the first carrier.

In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

The configuration information indicates a priority of the third carrier, and the priority of the first carrier is determined according to the priority of the third carrier.

In the above embodiment, the first terminal can determine the priority of the first carrier according to the priority of the third carrier indicated by the configuration information, so as to select the second carrier based on the priority of the first carrier, thereby improving the accuracy of the second carrier selection.

In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

The configuration information indicates a default carrier among the third carriers, and a default carrier among the first carriers is determined according to the default carrier among the third carriers.

In the above embodiment, the first terminal can determine the default carrier in the first carrier according to the default carrier in the third carrier indicated by the configuration information, so that the second carrier can be selected based on the default carrier in the first carrier, thereby improving the accuracy of the second carrier selection.

In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

The first terminal higher layer determines the priority of the first carrier according to the quality of service attribute of the first service.

In the above embodiment, the high layer of the first terminal can determine the priority of the first carrier according to the service quality attributes of the first service, so that the determined priority of the first carrier can meet the service quality requirements, thereby selecting the second carrier based on the priority of the first carrier, and sending the side link data associated with the first target address based on the second carrier, which can improve the communication quality.

In combination with some embodiments of the first aspect, in some embodiments, sending the sidelink data associated with the first target address through the second carrier includes:

sending a first data packet through the second carrier, where the first data packet is a data packet belonging to the first target address; or

A second data packet belonging to the first target address is sent through the second carrier, and a priority of the second data packet is higher than a preset priority.

In the above embodiment, the first terminal can use the second carrier to send data packets belonging to the first target address, thereby improving the accuracy of data packet sending and improving communication quality, or the first terminal can preferentially use the second carrier to send high-priority data packets belonging to the first target address, thereby avoiding the loss of high-priority data packets and improving communication accuracy.

In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

Send instruction information;

The indication information is used to indicate at least one of the following:

a first carrier corresponding to the first target address;

the second carrier.

In the above embodiment, the first terminal can also notify the terminal receiving the broadcast service or multicast service of at least one of the first carrier supported by the first target address and the preferred carrier, so that the receiving terminal preferentially receives the sidelink data on the carrier supported by the first terminal or the preferred carrier, thereby ensuring that the carrier supported by the sending terminal and the carrier supported by the receiving terminal are consistent, avoiding the problem of data packet loss caused by the carrier supported by the sending terminal and the carrier supported by the receiving terminal being not completely consistent due to limited terminal capabilities, thereby improving communication quality.

In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by a second terminal, and the method includes:

Selecting a fourth carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, the first service is a broadcast service or a multicast service, the fourth carrier is partially or completely the same as the second carrier, and the second carrier is a carrier selected by the first terminal from the first carrier;

Sidelink data is received over a fourth carrier, the sidelink data being associated with the first target address.

In the above embodiment, for a broadcast service or a multicast service, the second terminal can select a fourth carrier from the first carrier corresponding to the first target address associated with the service, and send the sidelink data associated with the first target address through the fourth carrier. Thus, for a broadcast multicast service, the receiving terminal can select a fourth carrier from the first carrier supported by the first target address associated with the service, thereby determining the carrier used for carrier aggregation, and preferentially using the fourth carrier that is partially or completely identical to the second carrier selected by the sending terminal to receive the sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In combination with some embodiments of the second aspect, in some embodiments, selecting the fourth carrier from the first carrier corresponding to the first target address includes:

The fourth carrier is selected from the first carrier according to the priority of the first carrier.

In the above embodiment, the second terminal can select a high-priority carrier as the fourth carrier, thereby preferentially using the high-priority carrier to receive the side link data associated with the first target address, thereby avoiding the problem of data packet loss due to limited terminal capabilities, thereby reducing the data packet loss rate and improving communication quality.

In combination with some embodiments of the second aspect, in some embodiments, the fourth carrier is selected from the first carrier corresponding to the first target address. Waves, including:

The fourth carrier is selected from the first carriers according to a default carrier among the first carriers.

In the above embodiment, the second terminal can use the default carrier in the first carrier as the fourth carrier, and preferentially use the default carrier to receive the side link data associated with the first target address, thereby avoiding the loss of data packets due to limited terminal capabilities, thereby reducing the data packet loss rate and improving communication quality.

In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

receiving configuration information sent by a high layer of the second terminal; wherein the configuration information includes a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address;

Determine, according to the configuration information, a third carrier corresponding to the first target address;

A first carrier corresponding to the first target address is determined according to the third carrier corresponding to the first target address.

In the above embodiment, the second terminal can determine the third carrier corresponding to the first target address based on the mapping relationship between the first service and the third carrier configured by the high-level configuration and/or the mapping relationship between the first service and the first target address, and determine the first carrier corresponding to the first target address based on the third carrier corresponding to the first target address, thereby improving the accuracy of the first carrier.

In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

The configuration information indicates a priority of the third carrier, and the priority of the first carrier is determined according to the priority of the third carrier.

In the above embodiment, the first terminal can determine the priority of the first carrier according to the priority of the third carrier indicated by the configuration information, so as to select the fourth carrier based on the priority of the first carrier, thereby improving the accuracy of the selection of the fourth carrier.

In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

The configuration information indicates a default carrier among the third carriers, and a default carrier among the first carriers is determined according to the default carrier among the third carriers.

In the above embodiment, the first terminal can determine the default carrier in the first carrier according to the default carrier in the third carrier indicated by the configuration information, so that the fourth carrier can be selected based on the default carrier in the first carrier, thereby improving the accuracy of the fourth carrier selection.

In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

The second terminal high layer determines the priority of the first carrier according to the service quality attribute of the first service.

In the above embodiment, the high layer of the second terminal can determine the priority of the first carrier according to the service quality attributes of the first service, so that the determined priority of the first carrier can meet the service quality requirements, thereby selecting the fourth carrier based on the priority of the first carrier, and receiving the side link data associated with the first target address based on the fourth carrier, thereby improving the communication quality.

In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

receiving instruction information;

The indication information is used to indicate at least one of the following:

a first carrier corresponding to the first target address;

the second carrier.

In the above embodiment, the second terminal can also obtain at least one of the first carrier supported by the first target address and the carrier preferred by the first terminal, so that it can preferentially receive the side link data on the carrier supported by the first terminal or the carrier preferred by the first terminal, thereby ensuring that the carrier supported by the sending terminal and the carrier supported by the receiving terminal are consistent, avoiding the problem of data packet loss due to the limited terminal capabilities, the carrier supported by the sending terminal and the carrier supported by the receiving terminal are not completely consistent, thereby improving the communication quality.

In a third aspect, an embodiment of the present disclosure proposes a first terminal, which includes at least one of a transceiver module and a processing module: wherein the terminal is used to execute the first aspect and the optional implementation method of the first aspect.

In a fourth aspect, an embodiment of the present disclosure proposes a second terminal, which includes at least one of a transceiver module and a processing module: wherein the terminal is used to execute the second aspect and an optional implementation method of the second aspect.

In a fifth aspect, an embodiment of the present disclosure proposes a communication device, including:

one or more processors;

Wherein, the communication device is used to execute the communication method described in the embodiment of the first aspect.

In a sixth aspect, an embodiment of the present disclosure proposes a communication device, including:

one or more processors;

Wherein, the communication device is used to execute the communication method described in the embodiment of the second aspect.

In the seventh aspect, an embodiment of the present disclosure proposes a communication system, comprising a first terminal and a second terminal, wherein the first terminal is used to execute the method described in the first aspect and the optional implementation of the first aspect, and the second terminal is used to execute the method described in the second aspect and the optional implementation of the second aspect.

In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system. The chip or chip system includes a processing circuit configured to execute the method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

It is understandable that the above-mentioned terminal, communication system, storage medium, program product, computer program, chip or chip system are all used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here.

The embodiments of the present disclosure provide a communication method, a first terminal, a second terminal, and a communication system. In some embodiments, the terms such as communication method, information processing method, and communication method can be replaced with each other, the terms such as information transmission device, information processing device, and communication device can be replaced with each other, and the terms such as information processing system and communication system can be replaced with each other.

The embodiments of the present disclosure are not exhaustive, but are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily. For example, a solution after removing some steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in an embodiment can be arbitrarily combined. In addition, the embodiments can be combined arbitrarily. For example, some or all steps of different embodiments can be combined arbitrarily, and an embodiment can be arbitrarily combined with the optional implementation methods of other embodiments. combination.

In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

In the embodiments of the present disclosure, “plurality” refers to two or more.

In some embodiments, terms such as "at least one of", "one or more", "a plurality of", "multiple" and the like can be used interchangeably.

In some embodiments, "at least one of A and B", "A and/or B", "A in one case, B in another case", "in response to one case A, in response to another case B", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, quantity or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute redundant restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

In some embodiments, terms such as "in response to ...", "in response to determining ...", "in the case of ...", "at the time of ...", "when ...", "if ...", "if ...", etc. can be used interchangeably.

In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

In some embodiments, the terms "access network device (AN device), "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission/reception point (TRP)", "panel", "antenna panel (antenna panel)", "antenna array (antenna array)", "cell", "macro cell", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell)", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part (BWP))" and so on can be used interchangeably.

In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client and the like can be used interchangeably.

In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by the communication between multiple terminals (for example, it can also be referred to as device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, the language such as "uplink" and "downlink" can also be replaced by the language corresponding to the communication between the terminals (for example, "side"). For example, the uplink channel, the downlink channel, etc. can be replaced by the side channel, and the uplink, the downlink, etc. can be replaced by the side link.

In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal.

In some embodiments, the acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

In some embodiments, data, information, etc. may be obtained with the user's consent.

FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in FIG1 , the communication system 100 may include a first terminal 101 and a second terminal 102. A communication connection may be established between the first terminal 101 and the second terminal 102. SL communication may be performed between the first terminal 101 and the second terminal 102.

In some embodiments, the communication system 100 may further include a network device. Exemplarily, the first terminal 101 may establish a communication connection with the network device.

In some embodiments, the network device may include at least one of an access network device and a core network device.

In some embodiments, the first terminal 101 or the second terminal 102 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with a communication function, a smart car, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control (industrial control) terminal device, a wearable device, an Internet of Things device, a car with a communication function, a smart car, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a The invention relates to at least one of wireless terminal devices in, but is not limited to, wireless terminal devices in, wireless terminal devices in self-driving, wireless terminal devices in remote medical surgery, wireless terminal devices in smart grids, wireless terminal devices in transportation safety, wireless terminal devices in smart cities, and wireless terminal devices in smart homes.

In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a WiFi system, but is not limited thereto.

In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure may become internal interfaces of OpenRAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

In some embodiments, the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

In some embodiments, the core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. A person skilled in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto. The subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , or may include other subjects other than FIG1 , and the number and form of the subjects are arbitrary, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, which may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the fourth generation mobile communication system (4G), the fifth generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NXP ... The present invention relates to wireless communication systems such as LTE, Wi-Fi (X), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) network, Device to Device (D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle to Everything (V2X), systems using other communication methods, and next-generation systems expanded based on them. In addition, a combination of multiple systems (for example, a combination of LTE or LTE-A with 5G, etc.) may also be applied.

In order to support direct communication between terminals, the SL communication mode is introduced. Optionally, the interface between the terminals can be PC-5 (direct communication interface).

In some embodiments, the terms "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" and the like can be used interchangeably.

Optionally, according to the corresponding relationship between the sending terminal and the receiving terminal, three transmission modes are supported on the SL: unicast, multicast and broadcast.

Optionally, there are two ways of allocating transmission resources in SL communication, one is the way of network scheduling transmission resources, and the other is the way of terminal autonomously selecting transmission resources from the network configuration or pre-configured resource pool. Among them, the network scheduling method is that the network device dynamically allocates transmission resources on SL to the terminal according to the cache data reported by the terminal, and the autonomous selection method is that the terminal randomly selects transmission resources from the network configuration or pre-configured resource pool. Optionally, the network device can configure multiple resource pools for the terminal on one BWP. Optionally, the specific resource allocation method used by the terminal can be configured by the network device through radio resource control (RRC) signaling.

In some embodiments, the name of the method for network scheduling to send resources is not limited. For example, the method for network scheduling to send resources may be mode 1 or mode1.

In some embodiments, the name of the method for autonomously selecting sending resources is not limited. For example, the method for autonomously selecting sending resources may be mode 2 or mode2.

The transmitting terminal sends sidelink control information (SCI) on the physical sidelink control channel (PSCCH) and the second-stage SCI on the physical sidelink shared channel (PSSCH), which carries the resource location of the transmission data and the source and target identifiers, etc. For HARQ-enabled data packets, the receiving terminal makes HARQ response (ACK) feedback (HARQ-ACK feedback) to PSSCH on the physical sidelink feedback channel (PSFCH).

In order to meet the requirements of single-user peak rate and system capacity improvement, the system transmission bandwidth can be increased, for example, CA can be used. CA technology can aggregate multiple component carriers (CCs) together, effectively improving the uplink and downlink transmission rates.

In some embodiments, terms such as "uplink", "uplink", "physical uplink", etc. can be used interchangeably, and terms such as "downlink", "downlink", "physical downlink", etc. can be used interchangeably.

In some embodiments, due to limited receiving capability, the receiving terminal may only be able to receive sidelink services on one or several carriers, and due to limited sending capability, the transmitting terminal may only be able to send sidelink services on one or several carriers.

In some embodiments, a higher layer implementation may be relied upon to determine which service is of interest and receive only the carrier associated with the service of interest. data.

In some embodiments, for broadcast multicast services, the higher layer (V2X layer) provides the access stratum (AS layer) with a mapping relationship between service and frequency, and the higher layer provides the AS layer with a mapping relationship between service and destination layer 2 ID (Destination L2ID). The AS layer can obtain a mapping relationship between layer 2 ID and frequency based on these two mapping relationships.

In some embodiments, the network device can be configured with a frequency list supported by the terminal. If carrier aggregation is not supported, the list has only one entry (that is, only one carrier). If carrier aggregation is introduced, the list can be expanded to include multiple entries (that is, it can include multiple carriers).

In some embodiments, "carrier", "frequency band", "spectrum" and "frequency" may be used interchangeably.

In some embodiments, for a target layer 2 address associated with a broadcast multicast service, the terminal determines the available frequency (carrier/frequency band) through the intersection of high-level configuration and network configuration.

In some embodiments, the sidelink supports carrier aggregation. In some scenarios, limited terminal capabilities are not considered. By default, a terminal supporting carrier aggregation supports sending and receiving on all carriers. In some scenarios, limited terminal capabilities must be considered.

In some embodiments, for broadcast and multicast services, if the carrier supported by the transmitting terminal for sending is not completely consistent with the carrier supported by the receiving terminal for receiving, data packets may be lost. Therefore, considering the limited terminal capabilities, how to determine the carrier used by the transmitting terminal and the receiving terminal for carrier aggregation is an urgent problem to be solved.

Based on this, the present disclosure proposes a communication method.

Optionally, in some embodiments, the method of the present disclosure can be applied to SL CA scenarios. For example, in some embodiments, the method of the present disclosure can be applied to vehicle networking scenarios.

FIG2 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes:

Step S2101: The first terminal 101 selects a second carrier from the first carrier.

In some embodiments, "carrier", "frequency band", "spectrum" and "frequency" may be used interchangeably.

In some embodiments, the first carrier may be a carrier corresponding to the first target address, that is, the first terminal 101 may select the second carrier from the first carrier corresponding to the first target address. Exemplarily, the target address may be a target layer 2 address. Exemplarily, there are multiple first carriers. Exemplarily, there are one or more second carriers.

In some embodiments, the first target address and the first target layer 2 address may be interchangeable.

In some embodiments, the first target address is associated with a first service, and the first service may be a broadcast service or a multicast service.

In some embodiments, the first carrier corresponding to the first target address may refer to a carrier supported by the first target address. Exemplarily, the carrier supported by the first target address may refer to a carrier supported by the first terminal 101 for sending and/or receiving sidelink data associated with the first target address. Exemplarily, if the first target address is a target address associated with a multicast service, the carrier supported by the first target address may refer to a carrier that can be used by the first terminal 101 to send and/or receive multicast services or multicast sidelink data associated with the first target address. Exemplarily, if the first target address is a target address associated with a broadcast service, the carrier supported by the first target address may refer to a carrier that can be used by the first terminal 101 to send and/or receive broadcast services or broadcast sidelink data associated with the first target address.

In some embodiments, the first terminal 101 may select a second carrier from the first carrier according to the priority of the first carrier. For example, a first carrier having a priority higher than a set priority may be used as the second carrier, that is, a first carrier with a high priority may be selected as the second carrier. For example, the first carriers may be sorted in order from high to low according to the priority of the first carriers, and a preset number of first carriers in the front order may be used as the second carrier. For example, the first terminal 101 may select the first carrier that the first terminal 101 supports sending and/or receiving and is in the front order as the second carrier according to its own sending and/or receiving capabilities on the first carrier and the priority of the first carrier in order from high to low. Thus, the second carrier is selected according to the priority of the first carrier, so that the high-priority carrier is preferentially used to send the side link data, which can reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the first terminal 101 may receive configuration information sent by a higher layer of the first terminal 101, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the priority of the third carrier may be indicated in the configuration information. According to the configuration information, the third carrier corresponding to the first target address and/or the priority of the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined based on the mapping relationship between the first service and the third carrier and/or the mapping relationship between the first service and the first target address, and the priority of the third carrier may be determined based on the priority of the third carrier indicated by the configuration information. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the third carriers corresponding to the first target address b1 are c1, c2, c3, and c4.

In some embodiments, the first terminal 101 high layer may determine the priority of the third carrier according to the quality of service (QoS) attribute of the first service. Exemplarily, the QoS attribute may include at least one of the following: PC5 fifth generation quality of service indicator (PC55th generation qos indicator, PQI), default priority (default priority), packet delay budget (packet delay budget, PDB), packet error rate (packet error rate, PER). Exemplarily, if the default priority of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PDB of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PER of the first service is lower, the priority of the third carrier is higher. Thus, determining the priority of the third carrier based on the QoS attribute of the first service can meet the quality of service requirements.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address according to the third carrier corresponding to the first target address. Optionally, the first terminal 101 may determine the third carrier as the first carrier corresponding to the first target address. Optionally, the network device configures the first terminal 101 with a fifth carrier, and the first terminal 101 may determine the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address.

In some embodiments, the configuration information includes a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information indicates the priority of the third carrier, then the first terminal 101 can determine the third carrier corresponding to the first target address and the priority of the third carrier according to the configuration information. Optionally, the first terminal 101 can determine the third carrier as the first carrier corresponding to the first target address, and determine the priority of the third carrier as the priority of the first carrier.

In some embodiments, the network device may determine the priority of the fifth carrier and configure it to the first terminal 101, and the first terminal 101 may obtain the fifth carrier and/or the priority of the fifth carrier configured by the network device, so that the first terminal 101 may determine the fifth carrier and the priority of the fifth carrier according to the configuration of the network device. Exemplarily, the network device may be configured to the first terminal 101 through RRC signaling. Exemplarily, if the first terminal 101 is in an RRC connected state, the configuration may be obtained through dedicated signaling. Exemplarily, if the first terminal 101 is in an RRC idle state or an RRC dormant state, the first terminal 101 may obtain the configuration through a system information block (SIB). Exemplarily, if the first terminal 101 is out of coverage (OOC), the first terminal 101 may obtain the configuration through pre-configuration. Exemplarily, the network device may carry the fifth carrier and the priority of the fifth carrier through sl-FreqInfoList. Exemplarily, the fifth carrier may be a carrier that supports sending and/or receiving sidelink data by a terminal under the network device.

For example, if the fifth carrier configured by the network device is c2, c3, c4, d1 and the priority of the fifth carrier c2, c3, c4, d1, then the first terminal 101 can determine the priority of carrier c2, the priority of carrier c3, the priority of carrier c4, and the priority of carrier d1 according to the configuration of the network device.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address and the priority of the first carrier according to the configuration of the high layer and the configuration of the network device.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and determine the priority of the first carrier according to the high-level configuration and the network configuration. Optionally, the first terminal 101 may determine the intersection of the third carrier and the fifth carrier configured by the network device as the first carrier corresponding to the first target address. Optionally, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 may decide whether to determine the priority of the first carrier according to the priority configured by the high-level layer, or to determine the priority of the first carrier according to the priority configured by the network device. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 determines the priority of the first carrier according to the network configuration. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 determines the priority of the first carrier according to the high-level configuration.

For example, the first terminal 101 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the third carrier corresponding to the first target address b1 is determined to be c1, c2, c3, and c4, and the first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of the side link data is c2, c3, and c4 according to the configuration of the network device, d1, the first terminal 101 determines that the first carrier corresponding to the first target address is c2, c3, and c4, and the first terminal 101 determines the priority of the first carriers c2, c3, and c4 through the high-level configuration and the network device configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the first terminal 101 can implement the decision to determine the priority of carrier c2 according to the high-level configuration or the network configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the first terminal 101 determines the priority of carrier c2 according to the network device configuration. For example, for carrier c2, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 determines the priority of carrier c2 according to the high-level layer configuration.

In some embodiments, the first terminal 101 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the priority of the first carriers c2, c3, and c4 is in the order of c4, c3, and c2 from high to low. The first terminal 101 supports transmission and/or reception on two carriers at the same time. The first terminal 101 determines carrier c4 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the first terminal 101 configures at a high level a mapping relationship between the first service and the third carrier and/or the priority of the third carrier, and/or a mapping relationship between the first service and the first target address, and the network device configures a fifth carrier, but the network device does not configure the priority of the fifth carrier, the first terminal 101 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the high-level configuration, determine the second carrier according to the order of the priorities of the first carrier from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the priorities of the third carriers c1, c2, c3, c4 are configured, then the first terminal 101 can determine that the third carriers corresponding to the first target address b1 are c1, c2, c3, c4 according to the high-level configuration, and the first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of the sidelink data is c2, c3, c4 according to the configuration of the network device. 4, d1, the first terminal 101 can take the intersection carriers c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the priority of the carriers c2, c3, c4 is determined according to the high-level configuration. The priority of the first carriers c2, c3, c4 is in the order of c4, c3, c2 from high to low. The first terminal 101 supports sending and/or receiving on 2 carriers at the same time. The first terminal 101 determines carrier c4 and carrier c3 as the second carrier.

In some possible implementations, if the first terminal 101 high-level configures the mapping relationship between the first service and the third carrier, and the mapping relationship between the first service and the first target address, the high-level does not configure the carrier priority of the third carrier, and the network device configures the fifth carrier and/or the fifth carrier priority, the first terminal 101 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the configuration of the network device, and determine the second carrier according to the order of the priorities of the first carrier from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first service a1 in a high-level manner as b1, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then, the first terminal 101 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of sidelink data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the priority of the fifth carrier. The first terminal 101 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the priority of the carriers c2, c3, and c4 according to the configuration of the network device. The priority of the first carriers c2, c3, and c4 is in the order of c2, c3, and c4 from high to low. The first terminal 101 supports sending and/or receiving on two carriers at the same time, and the first terminal 101 determines carrier c2 and carrier c3 as the second carrier.

In some embodiments, the first terminal 101 may select a second carrier from the first carrier according to a default carrier in the first carrier. Exemplarily, the second carrier may be selected from the default carrier. Exemplarily, the default carrier may refer to a carrier recommended for priority use. Exemplarily, the default carrier may be one or more. Thus, by selecting the second carrier according to the default carrier in the first carrier, the sidelink data is preferentially sent using the default carrier, which may reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the first terminal 101 may receive configuration information sent by a higher layer of the first terminal 101, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information may indicate a default carrier in the third carrier. According to the configuration information, the third carrier corresponding to the first target address and/or the default carrier in the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined based on a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the carriers corresponding to the first target address b1 are c1, c2, c3, and c4. Exemplarily, the high-level layer of the first terminal 101 may indicate that carriers c2 and c3 are default carriers. Exemplarily, when indicating the third carrier corresponding to the first service a1, such as c1, c2, c3, and c4, the high-level layer of the first terminal 101 may indicate whether c1, c2, c3, and c4 are default carriers through additional indication information, such as additional bits. When a certain carrier has an additional bit indication, it indicates that the carrier is the default carrier. When a certain carrier does not have an additional bit indication, it indicates that the carrier is not the default carrier.

It should be noted that, in the present disclosure, other forms may also be used to indicate the default carrier in the third carrier, and the present disclosure does not make any specific limitation.

In some embodiments, the first terminal 101 may determine the third carrier corresponding to the first target address determined by the configuration information as the first carrier corresponding to the first target address, and determine the default carrier of the third carrier as the default carrier among the first carriers.

In some embodiments, the network device may determine a default carrier in the fifth carrier and configure it to the first terminal 101. The first terminal 101 may obtain the fifth carrier and the default carrier in the fifth carrier configured by the network device, thereby determining the fifth carrier and the default carrier in the fifth carrier according to the configuration of the network device. Exemplarily, the network device may notify the first terminal 101 through RRC signaling. Exemplarily, If the first terminal 101 is in an RRC connected state, the configuration can be obtained through dedicated signaling. Exemplarily, if the first terminal 101 is in an RRC idle state or an RRC dormant state, the first terminal 101 can obtain the configuration through SIB. Exemplarily, if the first terminal 101 is in OOC, the first terminal 101 can obtain the configuration through pre-configuration. Exemplarily, the network device can carry the default carrier through sl-FreqInfoList.

In some embodiments, the first terminal 101 may determine the fifth carrier configured by the network device as the first carrier corresponding to the first target address, and determine the default carrier of the fifth carrier as the default carrier among the first carriers.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address and a default carrier among the first carriers according to high-level configuration and network device configuration.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and the first terminal 101 may determine the default carrier in the first carrier according to the default carrier in the third carrier indicated by the high-level configuration and the default carrier in the fifth carrier configured by the network device. Optionally, for a first carrier, if the high-level configuration and the network configuration of whether the first carrier is the default carrier are different, the first terminal 101 may implement the decision to determine whether the first carrier is the default carrier according to the high-level configuration, or to determine whether the first carrier is the default carrier according to the network configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the first terminal 101 determines whether the first carrier is the default carrier according to the network device configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the first terminal 101 determines whether the first carrier is the default carrier according to the high-level configuration.

For example, the first terminal 101 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4. Then the third carrier corresponding to the first target address b1 is determined to be c1, c2, c3, and c4. The first terminal determines that the fifth carrier supporting the sending and/or receiving of side link data is c2, c3, and c4 according to the configuration of the network device, d1. The first terminal 101 determines that the first carrier corresponding to the first target address is c2, c3, and c4. The first terminal 101 determines the default carrier among the first carriers c2, c3, and c4 through high-level configuration and network device configuration. For example, both the high-level configuration and the network configuration indicate that carrier c3 and carrier c4 are the default carriers, the high-level configuration indicates that c2 is the default carrier, and the network device configuration indicates that c2 is not the default carrier. If it is determined based on the high-level configuration whether c2 is the default carrier, then it can be determined that carrier c2 is the default carrier, and thus it can be determined that the default carriers in the first carrier are carrier c2, carrier c3, and carrier c4. If it is determined based on the network device configuration whether c2 is the default carrier, then it can be determined that carrier c2 is not the default carrier, and thus it can be determined that the default carriers in the first carrier are carrier c3 and carrier c4.

In some embodiments, the first terminal 101 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the default carriers among the first carriers c2, c3, and c4 are c2 and c3, and the first terminal 101 supports transmission and/or reception on two carriers at the same time. The first terminal 101 determines carrier c2 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the first terminal 101 configures at a high level a mapping relationship between the first service and the third carrier and/or a default carrier in the third carrier, and/or a mapping relationship between the first service and the first target address, and the network device configures a fifth carrier but does not indicate a default carrier in the fifth carrier, the first terminal 101 may take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the high-level configuration, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the default carriers among the third carriers c1, c2, c3, c4 (for example, carrier c2 and carrier c3) are configured, then the first terminal 101 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, c4 according to the high-level configuration, and the first terminal 101 determines the fifth carrier supporting the sending and/or receiving of the sidelink data according to the configuration of the network device. For c2, c3, c4, d1, the first terminal 101 can take the intersection carrier c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the default carrier among the carriers c2, c3, c4 is determined according to the high-level configuration. The default carrier among the first carriers c2, c3, c4 is carrier c2 and carrier c3. The first terminal 101 supports sending and/or receiving on 2 carriers at the same time. The first terminal 101 determines carrier c2 and carrier c3 as the second carrier.

In some possible implementations, if the first terminal 101 configures a mapping relationship between the first service and the third carrier, and/or a mapping relationship between the first service and the first target address at a high level, and the network device configures a fifth carrier and/or a default carrier in the fifth carrier, the first terminal 101 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the configuration of the network device, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first target address associated with the first service a1 to be b1 in the high-level configuration, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the first terminal 101 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal determines that the fifth carrier supporting sending and/or receiving side link data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the default carrier in the fifth carrier (for example, carrier c3 and carrier c4). The first terminal 101 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the default carrier among the carriers c2, c3, and c4 according to the configuration of the network device. The default carrier among the first carriers c2, c3, and c4 is carrier c3 and carrier c4. The first terminal 101 supports sending and/or receiving on two carriers at the same time, and the first terminal 101 determines carrier c3 and carrier c4 as the second carrier.

It should be noted that, in the present disclosure, the above-mentioned scheme for determining the priority of the first carrier and the scheme for determining the default carrier in the first carrier can be executed either one or at the same time, and the present disclosure does not limit this.

In some embodiments, the AS layer of the first terminal 101 may receive configuration information sent by the high layer of the first terminal 101, wherein the configuration information may include one or more of a mapping relationship between the first service and the third carrier, a mapping relationship between the first service and the first target address, a mapping relationship between the QoSflow (QoS flow) associated with the first service and the first target address, and a mapping relationship between the QoSflow associated with the first service and the third carrier. Exemplarily, the high layer may be a V2X layer. Exemplarily, the first terminal 101 in an RRC connection state sends the mapping relationship between the QoSflow associated with the first service and the first target address, and/or the mapping relationship between the QoSflow associated with the first service and the third carrier to the network device. Exemplarily, the first terminal 101 in an RRC connection state sends the first target address, the QoSflow associated with the first target address, and the third carrier mapped by the QoSflow associated with the first address to the network device. Exemplarily, the first terminal 101 sends the first target address, the QoSflow associated with the first target address, and the third carrier mapped by the QoSflow associated with the first address to the network device through sidelinkue information (SUI). Exemplarily, the first terminal 101 sends the first target address, the QoS flow associated with the first target address, and the third carrier mapped by the QoS flow associated with the first address to the network device through terminal assistance information (UE assistance information, UAI). Exemplarily, the first service can be any one of a unicast service, a multicast service, and a broadcast service.

For example, the first target address A is associated with three QoS flows, namely QoSflow1, QoSflow2, and QoSflow3, wherein the third carrier mapped by QoSflow1 is c1 and c2, the third carrier mapped by QoSflow2 is c1, c2, and c3, and the third carrier mapped by QoSflow3 is c1 and c3, the first terminal 101 in the RRC connection state can be sent to the network device in the following forms: (A, QoSflow1, c1, c2), (A, QoSflow2, c1, c2, c3), (A, QoSflow3, c1, c3).

It should be noted that the first target address, the QoS flow associated with the first target address, and the third carrier mapped by the QoS flow associated with the first address may also be sent to the network device in other reporting forms, which is not specifically limited in the present disclosure.

In some embodiments, terms such as "first", "certain", "preset", "preset", "set", "indicated", "some", "arbitrary", and "any" can be interchangeable, and "first", "certain A", "preset A", "set A", "indicate A", "some A", "any A", and "any A" can be interpreted as A pre-defined in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., and can also be interpreted as specific A, some A, arbitrary A, any A, or first A, etc., but are not limited to this.

Step S2102: The second terminal 102 selects a fourth carrier from the first carrier.

In some embodiments, the second terminal 102 may be a terminal that receives the first service of the first terminal 101. Exemplarily, if the first service is a multicast service, the second terminal 102 may be a terminal that receives the multicast service of the first terminal 101. Exemplarily, if the first service is a broadcast service, the second terminal 102 may be a terminal that receives the broadcast service of the first terminal 101.

In some embodiments, the second terminal 102 may select a fourth carrier from the first carrier corresponding to the first target address. The first target address is a target address associated with a first service of the first terminal 101, and the first service may be a broadcast service or a multicast service. Exemplarily, the fourth carrier is partially or completely the same as the second carrier. Exemplarily, due to different transceiver capabilities of the first terminal and the second terminal, the fourth carrier may be partially the same as the second carrier. Exemplarily, the fourth carrier is one or more.

In some embodiments, the second terminal 102 may select a fourth carrier from the first carrier according to the priority of the first carrier. For example, a first carrier having a priority higher than a set priority may be used as the fourth carrier, that is, a first carrier with a high priority may be selected as the fourth carrier. For example, the first carriers may be sorted in order from high to low according to the priority of the first carriers, and a preset number of first carriers in the front order may be used as the fourth carrier. For example, the second terminal 102 may select the first carrier that the second terminal 102 supports sending and/or receiving and is in the front order as the fourth carrier according to its own sending and/or receiving capabilities on the first carrier and the priority of the first carrier in order from high to low. Thus, the fourth carrier is selected according to the priority of the first carrier, so that the high-priority carrier is preferentially used to receive the side link data, which can reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the second terminal 102 may receive configuration information sent by a higher layer of the second terminal 102, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the priority of the third carrier may be indicated in the configuration information. According to the configuration information, the third carrier corresponding to the first target address and/or the priority of the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined according to the mapping relationship between the first service and the third carrier and/or the mapping relationship between the first service and the first target address, and the priority of the third carrier may be determined according to the priority of the third carrier indicated by the configuration information. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the third carriers corresponding to the first target address b1 are c1, c2, c3, and c4.

In some embodiments, the upper layer of the second terminal 102 may determine the priority of the third carrier according to the QoS attributes of the first service. Exemplarily, the QoS attributes may include at least one of the following: PQI, default priority, PDB, PER. Exemplarily, if the default priority of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PDB of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PER of the first service is lower, the priority of the third carrier is higher. Thus, determining the priority of the third carrier based on the QoS attributes of the first service can meet the quality of service requirements.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address according to the third carrier corresponding to the first target address. Optionally, the second terminal 102 may determine the third carrier as the first carrier corresponding to the first target address. Optionally, the network device configures the fifth carrier for the second terminal 102, and the second terminal 102 may determine the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address.

In some embodiments, the configuration information includes a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information indicates the priority of the third carrier, then the second terminal 102 can determine the third carrier corresponding to the first target address and the priority of the third carrier according to the configuration information. Optionally, the second terminal 102 can determine the third carrier as the first carrier corresponding to the first target address, and determine the priority of the third carrier as the priority of the first carrier.

In some embodiments, the network device may determine the priority of the fifth carrier and configure it to the second terminal 102, and the second terminal 102 may obtain the fifth carrier and/or the priority of the fifth carrier configured by the network device, so that the second terminal 102 may determine the fifth carrier and the priority of the fifth carrier according to the configuration of the network device. Exemplarily, the network device may be configured to the second terminal 102 through RRC signaling. Exemplarily, if the second terminal 102 is in an RRC connected state, the configuration may be obtained through dedicated signaling. Exemplarily, if the second terminal 102 is in an RRC idle state or an RRC dormant state, the second terminal 102 may obtain the configuration through SIB. Exemplarily, if the second terminal 102 is in OOC, the second terminal 102 may obtain the configuration through pre-configuration. Exemplarily, the network device may carry the fifth carrier and the priority of the fifth carrier through sl-FreqInfoList. Exemplarily, the fifth carrier may be a carrier that supports sending and/or receiving sidelink data by a terminal under the network device.

For example, if the fifth carrier configured by the network device is c2, c3, c4, d1 and the priority of the fifth carrier c2, c3, c4, d1, then the second terminal 102 can determine the priority of carrier c2, the priority of carrier c3, the priority of carrier c4, and the priority of carrier d1 according to the configuration of the network device.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address and the priority of the first carrier according to the configuration of the high layer and the configuration of the network device.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and determine the priority of the first carrier according to the high-level configuration and the network configuration. Optionally, the second terminal 102 may determine the intersection of the third carrier and the fifth carrier configured by the network device as the first carrier corresponding to the first target address. Optionally, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the second terminal 102 may decide whether to determine the priority of the first carrier according to the priority configured by the high-level layer, or to determine the priority of the first carrier according to the priority configured by the network device. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the second terminal 102 determines the priority of the first carrier according to the network configuration. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the second terminal 102 determines the priority of the first carrier according to the high-level configuration.

For example, the second terminal 102 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the third carrier corresponding to the first target address b1 is determined to be c1, c2, c3, and c4, and the second terminal 102 determines that the fifth carrier supporting the sending and/or receiving of the sidelink data is c2, c3, and c4 according to the configuration of the network device, d1, the second terminal 102 determines that the first carrier corresponding to the first target address is c2, c3, and c4, and the second terminal 102 determines the priority of the first carriers c2, c3, and c4 through the high-level configuration and the network device configuration. For example, for carrier c2, if the priorities of the high-level and network device configurations are different, the second terminal 102 can determine the priority of the first carriers c2, c3, and c4. The terminal 102 implements the decision to determine the priority of carrier c2 according to the high-level configuration or the network configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the second terminal 102 determines the priority of carrier c2 according to the network device configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the second terminal 102 determines the priority of carrier c2 according to the high-level configuration.

In some embodiments, the second terminal 102 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the priority of the first carriers c2, c3, and c4 is in the order of c4, c3, and c2 from high to low. The second terminal 102 supports transmission and/or reception on two carriers at the same time, and the second terminal 102 determines carrier c4 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the second terminal 102 configures at a high level a mapping relationship between the first service and the third carrier and/or the priority of the third carrier, and/or a mapping relationship between the first service and the first target address, the network device configures a fifth carrier, and the network device does not configure the priority of the fifth carrier, the second terminal 102 can take the intersection of the third carrier and the third carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the high-level configuration, determine the second carrier according to the order of the priorities of the first carriers from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the priorities of the third carriers c1, c2, c3, c4 are configured, then the second terminal 102 can determine that the third carriers corresponding to the first target address b1 are c1, c2, c3, c4 according to the high-level configuration, and the second terminal 102 determines that the fifth carrier supporting the sending and/or receiving of the sidelink data is c2, c3, c4 according to the configuration of the network device. 4, d1, the second terminal 102 can take the intersection carriers c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the priority of the carriers c2, c3, c4 is determined according to the high-level configuration. The priority of the first carriers c2, c3, c4 is in the order of c4, c3, c2 from high to low. The second terminal 102 supports sending and/or receiving on 2 carriers at the same time. The second terminal 102 determines carrier c4 and carrier c3 as the second carrier.

In some possible implementations, if the second terminal 102 high-level configures the mapping relationship between the first service and the third carrier, and the mapping relationship between the first service and the first target address, the high-level does not configure the carrier priority of the third carrier, and the network device configures the fifth carrier and/or the fifth carrier priority, the second terminal 102 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the configuration of the network device, and determine the second carrier according to the order of the priority of the first carrier from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 in the high-level configuration, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the second terminal 102 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of side link data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the priority of the fifth carrier. The second terminal 102 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the priority of carriers c2, c3, and c4 according to the configuration of the network device. The priority of the first carriers c2, c3, and c4 is in the order of c2, c3, and c4 from high to low. The second terminal 102 supports sending and/or receiving on two carriers at the same time, and the second terminal 102 determines carrier c2 and carrier c3 as the second carrier.

In some embodiments, the second terminal 102 may select a fourth carrier from the first carrier according to a default carrier in the first carrier. Exemplarily, the fourth carrier may be selected from the default carrier. Exemplarily, the default carrier may refer to a carrier recommended for priority use. Exemplarily, the default carrier may be one or more. Thus, by selecting the second carrier according to the default carrier in the first carrier, the sidelink data is preferentially sent using the default carrier, which may reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the second terminal 102 may receive configuration information sent by a higher layer of the second terminal 102, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information may indicate a default carrier in the first carrier. According to the configuration information, the third carrier corresponding to the first target address and/or the default carrier in the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined based on a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the carriers corresponding to the first target address b1 are c1, c2, c3, and c4. Exemplarily, the upper layer of the second terminal 102 can indicate that carriers c2 and c3 are default carriers. Exemplarily, when indicating the third carrier corresponding to the first service a1, such as c1, c2, c3, and c4, the upper layer of the second terminal 102 can indicate whether c1, c2, c3, and c4 are default carriers through additional indication information, such as additional bits. When a certain carrier has an additional bit indication, it indicates that the carrier is the default carrier. When a certain carrier does not have an additional bit indication, it indicates that the carrier is not the default carrier.

It should be noted that, in the present disclosure, other forms may also be used to indicate the default carrier in the third carrier, and the present disclosure does not make any specific limitation.

In some embodiments, the second terminal 102 may determine the third carrier corresponding to the first target address determined in the configuration information as the first carrier corresponding to the first target address, and determine the default carrier of the third carrier as the default carrier among the first carriers.

In some embodiments, the network device may determine the default carrier in the fifth carrier and configure it to the second terminal 102, and the second terminal 102 may obtain the fifth carrier configured by the network device and the default carrier in the fifth carrier, thereby determining the fifth carrier and the default carrier in the fifth carrier according to the configuration of the network device. Exemplarily, the network device may notify the second terminal 102 through RRC signaling. Exemplarily, if the second terminal 102 is in an RRC connected state, the configuration may be obtained through dedicated signaling. Exemplarily, if the second terminal 102 is in an RRC idle state or an RRC dormant state, the second terminal 102 may obtain the configuration through SIB. Exemplarily, if the second terminal 102 is in OOC, the second terminal 102 may obtain the configuration through pre-configuration. Exemplarily, the network device may carry the default carrier through sl-FreqInfoList.

In some embodiments, the first terminal 101 may determine the fifth carrier configured by the network device as the first carrier corresponding to the first target address, and determine the default carrier of the fifth carrier as the default carrier among the first carriers.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address and a default carrier among the first carriers according to the configuration of a high layer and the configuration of a network device.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and the second terminal 102 may determine the default carrier in the first carrier according to the default carrier in the third carrier indicated by the high-level configuration and the default carrier in the fifth carrier configured by the network device. Optionally, for a first carrier, if the high-level configuration and the network configuration of whether the first carrier is the default carrier are different, the second terminal 102 may implement the decision to determine whether the first carrier is the default carrier according to the high-level configuration, or to determine whether the first carrier is the default carrier according to the network configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the second terminal 102 determines whether the first carrier is the default carrier according to the network device configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the second terminal 102 determines whether the first carrier is the default carrier according to the high-level configuration.

For example, the second terminal 102 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then determines that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4. The configuration of the network device determines that the fifth carrier supporting the sending and/or receiving of the sidelink data is c2, c3, c4, d1, the second terminal 102 determines that the first carrier corresponding to the first target address is c2, c3, c4, and the second terminal 102 determines the default carrier among the first carriers c2, c3, and c4 through the high-level configuration and the network device configuration. For example, both the high-level configuration and the network configuration indicate that carrier c3 and carrier c4 are the default carriers, the high-level configuration indicates that c2 is the default carrier, and the network device configuration indicates that c2 is not the default carrier. If it is determined according to the high-level configuration whether c2 is the default carrier, then carrier c2 can be determined as the default carrier, so that the default carrier among the first carriers can be determined to be carrier c2, carrier c3, and carrier c4. If it is determined according to the network device configuration whether c2 is the default carrier, then carrier c2 can be determined not to be the default carrier, so that the default carrier among the first carriers can be determined to be carrier c3 and carrier c4.

In some embodiments, the second terminal 102 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the default carriers among the first carriers c2, c3, and c4 are c2 and c3, and the second terminal 102 supports transmission and/or reception on two carriers at the same time. The second terminal 102 determines carrier c2 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the second terminal 102 configures at a high level a mapping relationship between the first service and the third carrier and/or a default carrier in the third carrier, and/or a mapping relationship between the first service and the first target address, and the network device configures a fifth carrier but does not indicate a default carrier in the fifth carrier, the second terminal 102 may take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the high-level configuration, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the default carriers among the third carriers c1, c2, c3, c4 (for example, carrier c2 and carrier c3) are configured, then the second terminal 102 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, c4 according to the high-level configuration, and the second terminal 102 determines the fifth carrier supporting the sending and/or receiving of the sidelink data according to the configuration of the network device. For c2, c3, c4, d1, the second terminal 102 can take the intersection carrier c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the default carrier among the carriers c2, c3, c4 is determined according to the high-level configuration. The default carrier among the first carriers c2, c3, c4 is carrier c2 and carrier c3. The second terminal 102 supports sending and/or receiving on 2 carriers at the same time. The second terminal 102 determines carrier c2 and carrier c3 as the second carrier.

In some possible implementations, if the second terminal 102 configures a mapping relationship between the first service and the third carrier, and/or a mapping relationship between the first service and the first target address at a high level, and the network device configures a fifth carrier and/or a default carrier in the fifth carrier, the second terminal 102 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the configuration of the network device, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 in the high-level configuration, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the second terminal 102 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal determines that the fifth carrier supporting sending and/or receiving side link data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the default carrier in the fifth carrier (for example, carrier c3 and carrier c4). The second terminal 102 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the default carrier among the carriers c2, c3, and c4 according to the configuration of the network device. The default carrier among the first carriers c2, c3, and c4 is carrier c3 and carrier c4. The second terminal 102 supports sending and/or receiving on two carriers at the same time, and the second terminal 102 determines carrier c3 and carrier c4 as the second carrier.

It should be noted that, in the present disclosure, the above-mentioned scheme for determining the priority of the first carrier and the scheme for determining the default carrier in the first carrier can be executed either one or at the same time, and the present disclosure does not limit this.

In some embodiments, the network device connected to the second terminal 102 may be the same as or different from the network device connected to the first terminal 101, that is, the networks in which the first terminal 101 and the second terminal 102 are located may be the same or different. Exemplarily, the network device connected to the second terminal 102 is different from the network device connected to the first terminal 101, and the fourth carrier selected by the second terminal 102 from the first carrier may be partially the same as or completely the same as the second carrier selected by the first terminal 101 from the first carrier.

Step S2103: The first terminal 101 sends side link data associated with the first target address.

In some embodiments, the first terminal 101 may send the sidelink data associated with the first target address via the second carrier, wherein the sidelink data associated with the first target address may be understood as data of the first service associated with the first target address.

In some embodiments, the first terminal 101 may send a first data packet belonging to the first target address via the second carrier, wherein the first data packet may be a data packet belonging to the first target address. In other words, the second carrier in the first carrier may be preferentially used to send any data packet belonging to the first target address.

In some embodiments, if the second carrier is a carrier with a priority higher than the set priority in the first carrier, that is, the second carrier is a high-priority carrier in the first carrier, then the first terminal 101 can give priority to sending any data packet belonging to the first target address on the high-priority carrier. Exemplarily, if the first service is a multicast service, any data packet belonging to the target address associated with the multicast service can be preferentially sent on the high-priority carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, any data packet belonging to the target address associated with the broadcast service can be preferentially sent on the high-priority carrier corresponding to the target address associated with the broadcast service.

In some embodiments, if the second carrier is the default carrier in the first carrier, the first terminal 101 may preferentially send any data packet belonging to the first target address on the default carrier. Exemplarily, if the first service is a multicast service, any data packet belonging to the target address associated with the multicast service may preferentially be sent on the default carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, any data packet belonging to the target address associated with the broadcast service may preferentially be sent on the default carrier corresponding to the target address associated with the broadcast service.

In some embodiments, the first terminal 101 may send a second data packet belonging to the first target address via the second carrier, wherein the priority of the second data packet is higher than the preset priority. In other words, the second carrier may be preferentially used to send data packets belonging to the first target address whose priority is higher than the preset priority.

In some embodiments, if the second carrier is a carrier with a higher priority than the set priority in the first carrier, that is, the second carrier is a high-priority carrier in the first carrier, then the first terminal 101 can give priority to sending high-priority data packets belonging to the first target address on the high-priority carrier. Exemplarily, if the first service is a multicast service, high-priority data packets belonging to the target address associated with the multicast service can be given priority to be sent on the high-priority carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, high-priority data packets belonging to the target address associated with the broadcast service can be given priority to be sent on the high-priority carrier corresponding to the target address associated with the broadcast service.

In some embodiments, if the second carrier is a default carrier in the first carrier, the first terminal 101 may preferentially send a high priority data packet on the default carrier. High priority data packets may be preferentially sent on the default carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, high priority data packets belonging to the target address associated with the broadcast service may be preferentially sent on the default carrier corresponding to the target address associated with the broadcast service.

In some embodiments, the fourth carrier is partially or completely identical to the second carrier, and the second terminal 102 can receive the sidelink data associated with the first target address through the fourth carrier. Exemplarily, if the fourth carrier is a carrier with a priority higher than the set priority in the first carrier, the second terminal 102 can preferentially receive the sidelink data associated with the first target address on the carrier with the high priority. Exemplarily, if the fourth carrier is a default carrier in the first carrier, the second terminal 102 can preferentially receive the sidelink data associated with the first target address on the default carrier.

In the present disclosure, the first terminal 101 and the second terminal 102 select the second carrier and the fourth carrier respectively according to the priority of the first carrier or the default carrier in the first carrier, so that the fourth carrier and the second carrier can be as similar as possible, thereby reducing the probability of packet loss and improving communication quality.

In some embodiments, the first terminal 101 may send indication information, wherein the indication information is used to indicate at least one of the following: a first carrier corresponding to the first target address; and a second carrier.

In some embodiments, the first terminal 101 may broadcast or multicast the indication information through PC5 signaling. Exemplarily, the PC5 signaling may be a PC5 media access control element (MAC CE), or may be other PC5 signaling that can also be supported by broadcast or multicast, which is not limited in the present disclosure. The PC5 signaling may be sent on a carrier or frequency band supported by both R16 and R17.

In some embodiments, the first terminal 101 may indicate whether transmission is supported on a carrier through a MAC CE. Exemplarily, each bit of the MAC CE corresponds to indicating whether the first terminal 101 supports transmission on the carrier. Exemplarily, a bit value of 1 indicates that transmission is supported on the carrier, and a bit value of 0 indicates that transmission is not supported on the carrier. Exemplarily, the bits of the MAC CE correspond to the carrier identifiers in ascending or descending order.

In some embodiments, the first terminal 101 may indicate whether to give priority to transmission on a carrier through a MAC CE. Exemplarily, each bit of the MAC CE corresponds to indicating whether the first terminal 101 supports giving priority to transmission on the carrier, a bit value of 1 indicates that the first terminal 101 supports giving priority to transmission on the carrier, and a bit value of 0 indicates that the first terminal 101 does not give priority to transmission on the carrier. Exemplarily, the bits of the MAC CE correspond one-to-one to the carrier identifier in ascending or descending order.

In some embodiments, the second terminal 102 may receive the indication information sent by the first terminal 101, and receive the sidelink data associated with the first target address according to the indication information. Exemplarily, the second terminal 102 may receive the sidelink data associated with the first target address on a carrier supported by the first terminal 101. Exemplarily, the second terminal 102 may receive the sidelink data associated with the first target address on a carrier preferentially sent by the first terminal 101.

In some embodiments, the first terminal 101 may obtain a mapping data packet of a logical channel (LCH) priority to a carrier, and the second terminal 102 may preferentially receive data packets on a carrier corresponding to a high LCH priority. The mapping relationship of the LCH priority to the carrier is configured or pre-configured by a network device. Exemplarily, if the first terminal 101 is in an RRC connected state, the configuration may be obtained through dedicated signaling. Exemplarily, if the first terminal 101 is in an RRC idle state or an RRC dormant state, the first terminal 101 may obtain the configuration through an SIB. Exemplarily, if the first terminal 101 is in an OOC, the first terminal 101 may obtain the configuration through pre-configuration.

In some embodiments, if the resource allocation method of the first terminal 101 is a method in which the network schedules and sends resources, the first terminal 101 can send information about the priority of the first carrier and/or information about the default carrier in the first carrier to the network device.

In some embodiments, if the first terminal 101 is in an RRC connected state, the first terminal 101 may send information about the priority of the first carrier and/or information about a default carrier in the first carrier to the network device.

The communication method involved in the embodiment of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2103 may be implemented as an independent embodiment, and steps S2101 and S2102 may be implemented as independent embodiments, but are not limited thereto.

In some embodiments, step S2102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

In this implementation mode or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other implementation modes or other examples.

FIG3A is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3A , the present disclosure embodiment relates to a communication method, which is used for a first terminal 101, and the method includes:

Step S3101: Select a second carrier from a first carrier.

The optional implementation of step S3101 can refer to the optional implementation of step S2101 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

Step S3102, sending side link data associated with the first target address.

The optional implementation of step S3102 can refer to the optional implementation of step S2103 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

In some embodiments, the first terminal 101 may send sidelink data to the second terminal 102, but is not limited thereto and may also send sidelink data to other entities.

In some embodiments, the second terminal 102 may be a terminal that receives a broadcast service or a multicast service of the first terminal 101 .

The communication method involved in the embodiment of the present disclosure may include at least one of step S3101 to step S3102. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, and step S3101 and step S3102 may be implemented as independent embodiments, but are not limited thereto.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG3B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3B , the present disclosure embodiment relates to a communication method, which is used for a first terminal 101, and the method includes:

Step S3201: Select a second carrier from the first carrier according to the priority of the first carrier corresponding to the first target address.

The optional implementation of step S3201 can refer to step S2101 in Figure 2, the optional implementation of step S3101 in Figure 3A, and other related parts in the embodiments involved in Figures 2 and 3A, which will not be repeated here.

Step S3202: sending sidelink data associated with the first target address via the second carrier.

The optional implementation of step S3202 can refer to step S2101 in FIG. 2 , the optional implementation of step S3101 in FIG. 3A , and other related parts in the embodiments involved in FIG. 2 and FIG. 3A , which will not be described in detail here.

The communication method involved in the embodiment of the present disclosure may include at least one of steps S3201 to S3203. For example, step S3201 It can be implemented as an independent embodiment, step S3202 can be implemented as an independent embodiment, step S3203 can be implemented as an independent embodiment, step S3201, step S3202 and step S3203 can be implemented as independent embodiments, but are not limited to this.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG3C is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3C , the present disclosure embodiment relates to a communication method, which is used for a first terminal 101, and the method includes:

Step S3301: Select a second carrier from the first carrier according to a default carrier in the first carrier corresponding to the first target address.

The optional implementation of step S3301 can refer to step S2101 in Figure 2, the optional implementation of step S3101 in Figure 3A, and other related parts in the embodiments involved in Figures 2 and 3A, which will not be repeated here.

Step S3302: Send sidelink data associated with the first target address via the second carrier.

The optional implementation of step S3302 can refer to step S2101 in Figure 2, the optional implementation of step S3101 in Figure 3A, and other related parts in the embodiments involved in Figures 2 and 3A, which will not be repeated here.

The communication method involved in the embodiment of the present disclosure may include at least one of step S3301 to step S3303. For example, step S3301 can be implemented as an independent embodiment, step S3302 can be implemented as an independent embodiment, step S3303 can be implemented as an independent embodiment, step S3303 can be implemented as an independent embodiment, step S3301 and step S3302 can be implemented as independent embodiments, step S3301, step S3302 and step S3303 can be implemented as independent embodiments but are not limited thereto.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG3D is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3D , the present disclosure embodiment relates to a communication method, which is used for a first terminal 101, and the method includes:

Step S3401: Select a second carrier from the first carrier corresponding to the first target address.

In some embodiments, "carrier", "frequency band", "spectrum" and "frequency" may be used interchangeably.

In some embodiments, the first carrier may be a carrier corresponding to the first target address, that is, the first terminal 101 may select the second carrier from the first carrier corresponding to the first target address. Exemplarily, the target address may be a target layer 2 address. Exemplarily, there are multiple first carriers. Exemplarily, there are one or more second carriers.

In some embodiments, the first target address and the first target layer 2 address may be interchangeable.

In some embodiments, the first target address is associated with a first service, and the first service may be a broadcast service or a multicast service.

In some embodiments, the first carrier corresponding to the first target address may refer to a carrier supported by the first target address. Exemplarily, the carrier supported by the first target address may refer to a carrier supported by the first terminal 101 for sending and/or receiving sidelink data associated with the first target address. Exemplarily, if the first target address is a target address associated with a multicast service, the carrier supported by the first target address may refer to a carrier that can be used by the first terminal 101 to send and/or receive multicast services or multicast sidelink data associated with the first target address. Exemplarily, if the first target address is a target address associated with a broadcast service, the carrier supported by the first target address may refer to a carrier that can be used by the first terminal 101 to send and/or receive broadcast services or broadcast sidelink data associated with the first target address.

In some embodiments, the first terminal 101 may select a second carrier from the first carrier according to the priority of the first carrier. For example, a first carrier having a priority higher than a set priority may be used as the second carrier, that is, a first carrier with a high priority may be selected as the second carrier. For example, the first carriers may be sorted in order from high to low according to the priority of the first carriers, and a preset number of first carriers in the front order may be used as the second carrier. For example, the first terminal 101 may select the first carrier that the first terminal 101 supports sending and/or receiving and is in the front order as the second carrier according to its own sending and/or receiving capabilities on the first carrier and the priority of the first carrier in order from high to low. Thus, the second carrier is selected according to the priority of the first carrier, so that the high-priority carrier is preferentially used to send the side link data, which can reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the first terminal 101 may receive configuration information sent by a higher layer of the first terminal 101, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the priority of the third carrier may be indicated in the configuration information. According to the configuration information, the third carrier corresponding to the first target address and/or the priority of the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined based on the mapping relationship between the first service and the third carrier and/or the mapping relationship between the first service and the first target address, and the priority of the third carrier may be determined based on the priority of the third carrier indicated by the configuration information. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the third carriers corresponding to the first target address b1 are c1, c2, c3, and c4.

In some embodiments, the first terminal 101 high layer may determine the priority of the third carrier according to the QoS attributes of the first service. Exemplarily, the QoS attributes may include at least one of the following: PQI, default priority, PDB, PER. Exemplarily, if the default priority of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PDB of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PER of the first service is lower, the priority of the third carrier is higher. Thus, determining the priority of the third carrier based on the QoS attributes of the first service can meet the quality of service requirements.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address according to the third carrier corresponding to the first target address. Optionally, the first terminal 101 may determine the third carrier as the first carrier corresponding to the first target address. Optionally, the network device configures the first terminal 101 with a fifth carrier, and the first terminal 101 may determine the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address.

In some embodiments, the configuration information includes a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information indicates the priority of the third carrier, then the first terminal 101 can determine the third carrier corresponding to the first target address and the priority of the third carrier according to the configuration information. Optionally, the first terminal 101 can determine the third carrier as the first carrier corresponding to the first target address, and determine the priority of the third carrier as the priority of the first carrier.

In some embodiments, the network device may determine the priority of the fifth carrier and configure it to the first terminal 101, and the first terminal 101 may obtain the fifth carrier and/or the priority of the fifth carrier configured by the network device, so that the first terminal 101 may determine the fifth carrier and the priority of the fifth carrier according to the configuration of the network device. Exemplarily, the network device may be configured to the first terminal 101 through RRC signaling. Exemplarily, if the first terminal 101 is in an RRC connected state, the configuration may be obtained through dedicated signaling. Exemplarily, if the first terminal 101 is in an RRC idle state or an RRC dormant state, the first terminal 101 may obtain the configuration through SIB. Exemplarily, if the first terminal 101 is in OOC, the first terminal 101 may obtain the configuration through pre-configuration. Exemplarily, the network device may carry the fifth carrier and the priority of the fifth carrier through sl-FreqInfoList. Exemplarily, the fifth carrier may be a carrier that supports sending and/or receiving sidelink data by a terminal under the network device.

For example, the fifth carrier configured by the network device is c2, c3, c4, d1 and the priority of the fifth carrier c2, c3, c4, d1, then the first terminal 101 can determine the priority of carrier c2, the priority of carrier c3, the priority of carrier c4, and the priority of carrier c5 according to the configuration of the network device. Priority of wave d1.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address and the priority of the first carrier according to the configuration of the high layer and the configuration of the network device.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and determine the priority of the first carrier according to the high-level configuration and the network configuration. Optionally, the first terminal 101 may determine the intersection of the third carrier and the fifth carrier configured by the network device as the first carrier corresponding to the first target address. Optionally, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 may decide whether to determine the priority of the first carrier according to the priority configured by the high-level layer, or to determine the priority of the first carrier according to the priority configured by the network device. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 determines the priority of the first carrier according to the network configuration. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 determines the priority of the first carrier according to the high-level configuration.

For example, the first terminal 101 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the third carrier corresponding to the first target address b1 is determined to be c1, c2, c3, and c4, and the first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of the side link data is c2, c3, and c4 according to the configuration of the network device, d1, the first terminal 101 determines that the first carrier corresponding to the first target address is c2, c3, and c4, and the first terminal 101 determines the priority of the first carriers c2, c3, and c4 through the high-level configuration and the network device configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the first terminal 101 can implement the decision to determine the priority of carrier c2 according to the high-level configuration or the network configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the first terminal 101 determines the priority of carrier c2 according to the network device configuration. For example, for carrier c2, if the priorities configured by the high-level layer and the network device are different, the first terminal 101 determines the priority of carrier c2 according to the high-level layer configuration.

In some embodiments, the first terminal 101 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the priority of the first carriers c2, c3, and c4 is in the order of c4, c3, and c2 from high to low. The first terminal 101 supports transmission and/or reception on two carriers at the same time. The first terminal 101 determines carrier c4 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the first terminal 101 configures at a high level a mapping relationship between the first service and the third carrier and/or the priority of the third carrier, and/or a mapping relationship between the first service and the first target address, and the network device configures a fifth carrier, but the network device does not configure the priority of the fifth carrier, the first terminal 101 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the high-level configuration, determine the second carrier according to the order of the priorities of the first carrier from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the priorities of the third carriers c1, c2, c3, c4 are configured, then the first terminal 101 can determine that the third carriers corresponding to the first target address b1 are c1, c2, c3, c4 according to the high-level configuration, and the first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of the sidelink data is c2, c3, c4 according to the configuration of the network device. 4, d1, the first terminal 101 can take the intersection carriers c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the priority of the carriers c2, c3, c4 is determined according to the high-level configuration. The priority of the first carriers c2, c3, c4 is in the order of c4, c3, c2 from high to low. The first terminal 101 supports sending and/or receiving on 2 carriers at the same time. The first terminal 101 determines carrier c4 and carrier c3 as the second carrier.

In some possible implementations, if the first terminal 101 high-level configures the mapping relationship between the first service and the third carrier, and the mapping relationship between the first service and the first target address, the high-level does not configure the carrier priority of the third carrier, and the network device configures the fifth carrier and/or the fifth carrier priority, the first terminal 101 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the configuration of the network device, and determine the second carrier according to the order of the priorities of the first carrier from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first service a1 in a high-level manner as b1, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then, the first terminal 101 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of sidelink data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the priority of the fifth carrier. The first terminal 101 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the priority of the carriers c2, c3, and c4 according to the configuration of the network device. The priority of the first carriers c2, c3, and c4 is in the order of c2, c3, and c4 from high to low. The first terminal 101 supports sending and/or receiving on two carriers at the same time, and the first terminal 101 determines carrier c2 and carrier c3 as the second carrier.

In some embodiments, the first terminal 101 may select a second carrier from the first carrier according to a default carrier in the first carrier. Exemplarily, the second carrier may be selected from the default carrier. Exemplarily, the default carrier may refer to a carrier recommended for priority use. Exemplarily, the default carrier may be one or more. Thus, by selecting the second carrier according to the default carrier in the first carrier, the sidelink data is preferentially sent using the default carrier, which may reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the first terminal 101 may receive configuration information sent by a higher layer of the first terminal 101, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information may indicate a default carrier in the third carrier. According to the configuration information, the third carrier corresponding to the first target address and/or the default carrier in the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined based on a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the carriers corresponding to the first target address b1 are c1, c2, c3, and c4. Exemplarily, the high-level layer of the first terminal 101 may indicate that carriers c2 and c3 are default carriers. Exemplarily, when indicating the third carrier corresponding to the first service a1, such as c1, c2, c3, and c4, the high-level layer of the first terminal 101 may indicate whether c1, c2, c3, and c4 are default carriers through additional indication information, such as additional bits. When a certain carrier has an additional bit indication, it indicates that the carrier is the default carrier. When a certain carrier does not have an additional bit indication, it indicates that the carrier is not the default carrier.

It should be noted that, in the present disclosure, other forms may also be used to indicate the default carrier in the third carrier, and the present disclosure does not make any specific limitation.

In some embodiments, the first terminal 101 may determine the third carrier corresponding to the first target address determined by the configuration information as the first carrier corresponding to the first target address, and determine the default carrier of the third carrier as the default carrier among the first carriers.

In some embodiments, the network device can determine the default carrier in the fifth carrier and configure it to the first terminal 101. The first terminal 101 can obtain the fifth carrier and the default carrier in the fifth carrier configured by the network device, thereby determining the fifth carrier and the default carrier in the fifth carrier according to the configuration of the network device. Exemplarily, the network device can notify the first terminal 101 through RRC signaling. Exemplarily, if the first terminal 101 is in an RRC connected state, the configuration can be obtained through dedicated signaling. Exemplarily, if the first terminal 101 is in an RRC idle state or an RRC dormant state, the first terminal 101 can obtain the configuration through SIB. Exemplarily, if the first terminal 101 In OOC, the first terminal 101 may obtain the configuration through pre-configuration. Exemplarily, the network device may carry the default carrier through sl-FreqInfoList.

In some embodiments, the first terminal 101 may determine the fifth carrier configured by the network device as the first carrier corresponding to the first target address, and determine the default carrier of the fifth carrier as the default carrier among the first carriers.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address and a default carrier among the first carriers according to high-level configuration and network device configuration.

In some embodiments, the first terminal 101 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and the first terminal 101 may determine the default carrier in the first carrier according to the default carrier in the third carrier indicated by the high-level configuration and the default carrier in the fifth carrier configured by the network device. Optionally, for a first carrier, if the high-level configuration and the network configuration of whether the first carrier is the default carrier are different, the first terminal 101 may implement the decision to determine whether the first carrier is the default carrier according to the high-level configuration, or to determine whether the first carrier is the default carrier according to the network configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the first terminal 101 determines whether the first carrier is the default carrier according to the network device configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the first terminal 101 determines whether the first carrier is the default carrier according to the high-level configuration.

For example, the first terminal 101 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4. Then the third carrier corresponding to the first target address b1 is determined to be c1, c2, c3, and c4. The first terminal determines that the fifth carrier supporting the sending and/or receiving of side link data is c2, c3, and c4 according to the configuration of the network device, d1. The first terminal 101 determines that the first carrier corresponding to the first target address is c2, c3, and c4. The first terminal 101 determines the default carrier among the first carriers c2, c3, and c4 through high-level configuration and network device configuration. For example, both the high-level configuration and the network configuration indicate that carrier c3 and carrier c4 are the default carriers, the high-level configuration indicates that c2 is the default carrier, and the network device configuration indicates that c2 is not the default carrier. If it is determined based on the high-level configuration whether c2 is the default carrier, then it can be determined that carrier c2 is the default carrier, and thus it can be determined that the default carriers in the first carrier are carrier c2, carrier c3, and carrier c4. If it is determined based on the network device configuration whether c2 is the default carrier, then it can be determined that carrier c2 is not the default carrier, and thus it can be determined that the default carriers in the first carrier are carrier c3 and carrier c4.

In some embodiments, the first terminal 101 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the default carriers among the first carriers c2, c3, and c4 are c2 and c3, and the first terminal 101 supports transmission and/or reception on two carriers at the same time. The first terminal 101 determines carrier c2 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the first terminal 101 configures at a high level a mapping relationship between the first service and the third carrier and/or a default carrier in the third carrier, and/or a mapping relationship between the first service and the first target address, and the network device configures a fifth carrier but does not indicate a default carrier in the fifth carrier, the first terminal 101 may take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the high-level configuration, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the default carriers among the third carriers c1, c2, c3, c4 (for example, carrier c2 and carrier c3) are configured, then the first terminal 101 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, c4 according to the high-level configuration, and the first terminal 101 determines the fifth carrier supporting the sending and/or receiving of the sidelink data according to the configuration of the network device. For c2, c3, c4, d1, the first terminal 101 can take the intersection carrier c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the default carrier among the carriers c2, c3, c4 is determined according to the high-level configuration. The default carrier among the first carriers c2, c3, c4 is carrier c2 and carrier c3. The first terminal 101 supports sending and/or receiving on 2 carriers at the same time. The first terminal 101 determines carrier c2 and carrier c3 as the second carrier.

In some possible implementations, if the first terminal 101 configures a mapping relationship between the first service and the third carrier, and/or a mapping relationship between the first service and the first target address at a high level, and the network device configures a fifth carrier and/or a default carrier in the fifth carrier, the first terminal 101 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the configuration of the network device, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the first terminal 101 configures the first target address associated with the first service a1 to be b1 in the high-level configuration, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the first terminal 101 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal determines that the fifth carrier supporting sending and/or receiving side link data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the default carrier in the fifth carrier (for example, carrier c3 and carrier c4). The first terminal 101 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the default carrier among the carriers c2, c3, and c4 according to the configuration of the network device. The default carrier among the first carriers c2, c3, and c4 is carrier c3 and carrier c4. The first terminal 101 supports sending and/or receiving on two carriers at the same time, and the first terminal 101 determines carrier c3 and carrier c4 as the second carrier.

It should be noted that, in the present disclosure, the above-mentioned scheme for determining the priority of the first carrier and the scheme for determining the default carrier in the first carrier can be executed either one or at the same time, and the present disclosure does not limit this.

In some embodiments, the AS layer of the first terminal 101 may receive configuration information sent by the high layer of the first terminal 101, wherein the configuration information may include one or more of a mapping relationship between the first service and the third carrier, a mapping relationship between the first service and the first target address, a mapping relationship between the QoSflow (QoS flow) associated with the first service and the first target address, and a mapping relationship between the QoSflow associated with the first service and the third carrier. Exemplarily, the high layer may be a V2X layer. Exemplarily, the first terminal 101 in an RRC connection state sends the mapping relationship between the QoSflow associated with the first service and the first target address, and/or the mapping relationship between the QoSflow associated with the first service and the third carrier to the network device. Exemplarily, the first terminal 101 in an RRC connection state sends the first target address, the QoSflow associated with the first target address, and the third carrier mapped by the QoSflow associated with the first address to the network device. Exemplarily, the first terminal 101 sends the first target address, the QoSflow associated with the first target address, and the third carrier mapped by the QoSflow associated with the first address to the network device through the SUI. Exemplarily, the first terminal 101 sends the first target address, the QoS flow associated with the first target address, and the third carrier mapped by the QoS flow associated with the first address to the network device through UAI. Exemplarily, the first service can be any service among unicast service, multicast service, and broadcast service.

Exemplarily, the first target address A is associated with three QoS flows, namely QoSflow1, QoSflow2, and QoSflow3, wherein the third carrier mapped by QoSflow1 is c1 and c2, the third carrier mapped by QoSflow2 is c1, c2, and c3, and the third carrier mapped by QoSflow3 is c1 and c3. The first terminal 101 in the RRC connected state can be sent to the network device in the following forms: (A, QoSflow1, c1, c2), (A, QoSflow2, c1, c2, c3), (A, QoSflow3, c1, c3).

It should be noted that other reporting forms may also be used to report the first target address, the QoS flow associated with the first target address, and the first address. The third carrier mapped by the QoS flow associated with the address is sent to the network device, which is not specifically limited in the present disclosure.

Step S3402: sending sidelink data via a second carrier, wherein the sidelink data is associated with a first target address.

In some embodiments, the first terminal 101 may send the sidelink data associated with the first target address via the second carrier, wherein the sidelink data associated with the first target address may be understood as data of the first service associated with the first target address.

In some embodiments, the first terminal 101 may send a first data packet belonging to the first target address via the second carrier, wherein the first data packet may be a data packet belonging to the first target address. In other words, the second carrier in the first carrier may be preferentially used to send any data packet belonging to the first target address.

In some embodiments, if the second carrier is a carrier with a priority higher than the set priority in the first carrier, that is, the second carrier is a high-priority carrier in the first carrier, then the first terminal 101 can give priority to sending any data packet belonging to the first target address on the high-priority carrier. Exemplarily, if the first service is a multicast service, any data packet belonging to the target address associated with the multicast service can be preferentially sent on the high-priority carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, any data packet belonging to the target address associated with the broadcast service can be preferentially sent on the high-priority carrier corresponding to the target address associated with the broadcast service.

In some embodiments, if the second carrier is the default carrier in the first carrier, the first terminal 101 may preferentially send any data packet belonging to the first target address on the default carrier. Exemplarily, if the first service is a multicast service, any data packet belonging to the target address associated with the multicast service may preferentially be sent on the default carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, any data packet belonging to the target address associated with the broadcast service may preferentially be sent on the default carrier corresponding to the target address associated with the broadcast service.

In some embodiments, the first terminal 101 may send a second data packet belonging to the first target address via the second carrier, wherein the priority of the second data packet is higher than the preset priority. In other words, the second carrier may be preferentially used to send a data packet belonging to the first target address whose priority is higher than the preset priority.

In some embodiments, if the second carrier is a carrier with a higher priority than the set priority in the first carrier, that is, the second carrier is a high-priority carrier in the first carrier, then the first terminal 101 can give priority to sending high-priority data packets belonging to the first target address on the high-priority carrier. Exemplarily, if the first service is a multicast service, high-priority data packets belonging to the target address associated with the multicast service can be given priority to be sent on the high-priority carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, high-priority data packets belonging to the target address associated with the broadcast service can be given priority to be sent on the high-priority carrier corresponding to the target address associated with the broadcast service.

In some embodiments, if the second carrier is the default carrier in the first carrier, the first terminal 101 may preferentially send high-priority data packets on the default carrier. Exemplarily, if the first service is a multicast service, high-priority data packets belonging to the target address associated with the multicast service may preferentially be sent on the default carrier corresponding to the target address associated with the multicast service. Exemplarily, if the first service is a broadcast service, high-priority data packets belonging to the target address associated with the broadcast service may preferentially be sent on the default carrier corresponding to the target address associated with the broadcast service.

In some embodiments, the first terminal 101 may send indication information, wherein the indication information is used to indicate at least one of the following: a first carrier corresponding to the first target address; and a second carrier.

In some embodiments, the first terminal 101 may broadcast or multicast the indication information through PC5 signaling. Exemplarily, the PC5 signaling may be PC5MAC CE, or may be other PC5 signaling that can also be supported by broadcast or multicast, which is not limited in the present disclosure. The PC5 signaling may be sent on a carrier or frequency band supported by both R16 and R17.

In some embodiments, the first terminal 101 may indicate whether transmission is supported on a carrier through a MAC CE. Exemplarily, each bit of the MAC CE corresponds to indicating whether the first terminal 101 supports transmission on the carrier. Exemplarily, a bit value of 1 indicates that transmission is supported on the carrier, and a bit value of 0 indicates that transmission is not supported on the carrier. Exemplarily, the bits of the MAC CE correspond to the carrier identifiers in ascending or descending order.

In some embodiments, the first terminal 101 may indicate whether to give priority to transmission on a carrier through a MAC CE. Exemplarily, each bit of the MAC CE corresponds to indicating whether the first terminal 101 supports giving priority to transmission on the carrier, a bit value of 1 indicates that the first terminal 101 supports giving priority to transmission on the carrier, and a bit value of 0 indicates that the first terminal 101 does not give priority to transmission on the carrier. Exemplarily, the bits of the MAC CE correspond one-to-one to the carrier identifier in ascending or descending order.

In some embodiments, the first terminal 101 can obtain the mapping relationship between the LCH priority and the carrier. If the data packet contains an LCH of a certain priority, the first terminal 101 can give priority to sending the data packet on the carrier corresponding to the LCH priority, and the second terminal 102 can give priority to receiving the data packet on the carrier corresponding to the high LCH priority. The mapping relationship between the LCH priority and the carrier is configured or pre-configured by the network device. Exemplarily, if the first terminal 101 is in the RRC connected state, the configuration can be obtained through dedicated signaling. Exemplarily, if the first terminal 101 is in the RRC idle state or the RRC dormant state, the first terminal 101 can obtain the configuration through the SIB. Exemplarily, if the first terminal 101 is in OOC, the first terminal 101 can obtain the configuration through pre-configuration.

In some embodiments, if the resource allocation method of the first terminal 101 is a method in which the network schedules and sends resources, the first terminal 101 can send information about the priority of the first carrier and/or information about the default carrier in the first carrier to the network device.

In some embodiments, if the first terminal 101 is in an RRC connected state, the first terminal 101 may send information about the priority of the first carrier and/or information about a default carrier in the first carrier to the network device.

The communication method involved in the embodiment of the present disclosure may include at least one of step S3401 to step S3402. For example, step S4301 may be implemented as an independent embodiment, step S3402 may be implemented as an independent embodiment, and step S3401 and step S3402 may be implemented as independent embodiments, but are not limited thereto.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG4A is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4A , the present disclosure embodiment relates to a communication method, which is used for a second terminal 102, and the method includes:

Step S4101: Select a fourth carrier from the first carrier.

The optional implementation of step S4101 can refer to the optional implementation of step S2102 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

Step S4102, obtaining side link data associated with the first target address.

The optional implementation of step S4102 can refer to the optional implementation of step S2103 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

In some embodiments, the first terminal 101 may send sidelink data to the second terminal 102, but is not limited thereto and may also send sidelink data to other entities.

In some embodiments, the second terminal 102 may be a terminal that receives a broadcast service or a multicast service of the first terminal 101 .

The communication method involved in the embodiment of the present disclosure may include at least one of step S4101 to step S4102. For example, step S4101 may be implemented as an independent embodiment, step S4102 may be implemented as an independent embodiment, and step S4101 and step S4102 may be implemented as independent embodiments, but are not limited thereto.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG4B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4B , the present disclosure embodiment relates to a communication method, which is used for the second terminal 102, and the method includes:

Step S4201: Select a fourth carrier from the first carrier according to the priority of the first carrier corresponding to the first target address.

The optional implementation of step S4201 can refer to the optional implementation of step S2102 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

Step S4202: Receive sidelink data associated with the first target address via a fourth carrier.

The optional implementation of step S4202 can refer to the optional implementation of step S2103 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

The communication method involved in the embodiment of the present disclosure may include at least one of step S4201 to step S4202. For example, step S4201 may be implemented as an independent embodiment, step S4202 may be implemented as an independent embodiment, and step S4201 and step S4202 may be implemented as independent embodiments, but are not limited thereto.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG4C is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4C , the present disclosure embodiment relates to a communication method for a second terminal 102, the method comprising:

Step S4301: Select a fourth carrier from the first carrier according to a default carrier in the first carrier corresponding to the first target address.

The optional implementation of step S4301 can refer to the optional implementation of step S2102 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

Step S4302: Receive sidelink data associated with the first target address via a fourth carrier.

The optional implementation of step S4302 can refer to the optional implementation of step S2103 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

The communication method involved in the embodiment of the present disclosure may include at least one of step S4301 to step S4302. For example, step S4301 may be implemented as an independent embodiment, step S4302 may be implemented as an independent embodiment, and step S4301 and step S4302 may be implemented as independent embodiments, but are not limited thereto.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG4D is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4D , the present disclosure embodiment relates to a communication method for a second terminal 102, the method comprising:

Step S4401: Select a fourth carrier from the first carrier corresponding to the first target address.

In some embodiments, the second terminal 102 may be a terminal that receives the first service of the first terminal 101. Exemplarily, if the first service is a multicast service, the second terminal 102 may be a terminal that receives the multicast service of the first terminal 101. Exemplarily, if the first service is a broadcast service, the second terminal 102 may be a terminal that receives the broadcast service of the first terminal 101.

In some embodiments, the second terminal 102 may select a fourth carrier from the first carrier corresponding to the first target address. The first target address is a target address associated with a first service of the first terminal 101, and the first service may be a broadcast service or a multicast service. Exemplarily, the fourth carrier is partially or completely the same as the second carrier. Exemplarily, due to different transceiver capabilities of the first terminal and the second terminal, the fourth carrier may be partially the same as the second carrier. Exemplarily, the fourth carrier is one or more.

In some embodiments, the second terminal 102 may select a fourth carrier from the first carrier according to the priority of the first carrier. For example, a first carrier having a priority higher than a set priority may be used as the fourth carrier, that is, a first carrier with a high priority may be selected as the fourth carrier. For example, the first carriers may be sorted in order from high to low according to the priority of the first carriers, and a preset number of first carriers in the front order may be used as the fourth carrier. For example, the second terminal 102 may select the first carrier that the second terminal 102 supports sending and/or receiving and is in the front order as the fourth carrier according to its own sending and/or receiving capabilities on the first carrier and the priority of the first carrier in order from high to low. Thus, the fourth carrier is selected according to the priority of the first carrier, so that the high-priority carrier is preferentially used to receive the side link data, which can reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the second terminal 102 may receive configuration information sent by a higher layer of the second terminal 102, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the priority of the third carrier may be indicated in the configuration information. According to the configuration information, the third carrier corresponding to the first target address and/or the priority of the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined according to the mapping relationship between the first service and the third carrier and/or the mapping relationship between the first service and the first target address, and the priority of the third carrier may be determined according to the priority of the third carrier indicated by the configuration information. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the third carriers corresponding to the first target address b1 are c1, c2, c3, and c4.

In some embodiments, the upper layer of the second terminal 102 may determine the priority of the third carrier according to the QoS attributes of the first service. Exemplarily, the QoS attributes may include at least one of the following: PQI, default priority, PDB, PER. Exemplarily, if the default priority of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PDB of the first service is lower, the priority of the third carrier is higher. Exemplarily, if the PER of the first service is lower, the priority of the third carrier is higher. Thus, determining the priority of the third carrier based on the QoS attributes of the first service can meet the quality of service requirements.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address according to the third carrier corresponding to the first target address. Optionally, the second terminal 102 may determine the third carrier as the first carrier corresponding to the first target address. Optionally, the network device configures the fifth carrier for the second terminal 102, and the second terminal 102 may determine the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address.

In some embodiments, the configuration information includes a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information indicates the priority of the third carrier, then the second terminal 102 can determine the third carrier corresponding to the first target address and the priority of the third carrier according to the configuration information. Optionally, the second terminal 102 can determine the third carrier as the first carrier corresponding to the first target address, and determine the priority of the third carrier as the priority of the first carrier.

In some embodiments, the network device may determine the priority of the fifth carrier and configure it to the second terminal 102. The second terminal 102 may obtain the fifth carrier and/or the priority of the fifth carrier configured by the network device, so that the second terminal 102 may obtain the fifth carrier and/or the priority of the fifth carrier configured by the network device according to the configuration of the network device. Determine the fifth carrier and the priority of the fifth carrier. Exemplarily, the network device can configure the second terminal 102 through RRC signaling. Exemplarily, if the second terminal 102 is in an RRC connected state, the configuration can be obtained through dedicated signaling. Exemplarily, if the second terminal 102 is in an RRC idle state or an RRC dormant state, the second terminal 102 can obtain the configuration through SIB. Exemplarily, if the second terminal 102 is in OOC, the second terminal 102 can obtain the configuration through pre-configuration. Exemplarily, the network device can carry the fifth carrier and the priority of the fifth carrier through sl-FreqInfoList. Exemplarily, the fifth carrier can be a carrier that supports sending and/or receiving sidelink data by terminals under the network device.

For example, if the fifth carrier configured by the network device is c2, c3, c4, d1 and the priority of the fifth carrier c2, c3, c4, d1, then the second terminal 102 can determine the priority of carrier c2, the priority of carrier c3, the priority of carrier c4, and the priority of carrier d1 according to the configuration of the network device.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address and the priority of the first carrier according to the configuration of the high layer and the configuration of the network device.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and determine the priority of the first carrier according to the high-level configuration and the network configuration. Optionally, the second terminal 102 may determine the intersection of the third carrier and the fifth carrier configured by the network device as the first carrier corresponding to the first target address. Optionally, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the second terminal 102 may decide whether to determine the priority of the first carrier according to the priority configured by the high-level layer, or to determine the priority of the first carrier according to the priority configured by the network device. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the second terminal 102 determines the priority of the first carrier according to the network configuration. Exemplarily, for a first carrier, if the priorities configured by the high-level layer and the network device are different, the second terminal 102 determines the priority of the first carrier according to the high-level configuration.

For example, the second terminal 102 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the third carrier corresponding to the first target address b1 is determined to be c1, c2, c3, and c4, and the second terminal 102 determines that the fifth carrier supporting the sending and/or receiving of the sidelink data is c2, c3, and c4 according to the configuration of the network device, d1, the second terminal 102 determines that the first carrier corresponding to the first target address is c2, c3, and c4, and the second terminal 102 determines the priority of the first carriers c2, c3, and c4 through the high-level configuration and the network device configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the second terminal 102 can implement the decision to determine the priority of carrier c2 according to the high-level configuration or the network configuration. For example, for carrier c2, if the priorities of the high-level configuration and the network device configuration are different, the second terminal 102 determines the priority of carrier c2 according to the network device configuration. For example, for carrier c2, if the priorities configured by the high-level layer and the network device are different, the second terminal 102 determines the priority of carrier c2 according to the high-level layer configuration.

In some embodiments, the second terminal 102 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the priority of the first carriers c2, c3, and c4 is in the order of c4, c3, and c2 from high to low. The second terminal 102 supports transmission and/or reception on two carriers at the same time, and the second terminal 102 determines carrier c4 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the second terminal 102 configures at a high level a mapping relationship between the first service and the third carrier and/or the priority of the third carrier, and/or a mapping relationship between the first service and the first target address, the network device configures a fifth carrier, and the network device does not configure the priority of the fifth carrier, the second terminal 102 can take the intersection of the third carrier and the third carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the high-level configuration, determine the second carrier according to the order of the priorities of the first carriers from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the priorities of the third carriers c1, c2, c3, c4 are configured, then the second terminal 102 can determine that the third carriers corresponding to the first target address b1 are c1, c2, c3, c4 according to the high-level configuration, and the second terminal 102 determines that the fifth carrier supporting the sending and/or receiving of the sidelink data is c2, c3, c4 according to the configuration of the network device. 4, d1, the second terminal 102 can take the intersection carriers c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the priority of the carriers c2, c3, c4 is determined according to the high-level configuration. The priority of the first carriers c2, c3, c4 is in the order of c4, c3, c2 from high to low. The second terminal 102 supports sending and/or receiving on 2 carriers at the same time. The second terminal 102 determines carrier c4 and carrier c3 as the second carrier.

In some possible implementations, if the second terminal 102 high-level configures the mapping relationship between the first service and the third carrier, and the mapping relationship between the first service and the first target address, the high-level does not configure the carrier priority of the third carrier, and the network device configures the fifth carrier and/or the fifth carrier priority, the second terminal 102 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the priority of the first carrier according to the configuration of the network device, and determine the second carrier according to the order of the priority of the first carrier from high to low, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 in the high-level configuration, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the second terminal 102 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal 101 determines that the fifth carrier supporting the sending and/or receiving of side link data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the priority of the fifth carrier. The second terminal 102 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the priority of carriers c2, c3, and c4 according to the configuration of the network device. The priority of the first carriers c2, c3, and c4 is in the order of c2, c3, and c4 from high to low. The second terminal 102 supports sending and/or receiving on two carriers at the same time, and the second terminal 102 determines carrier c2 and carrier c3 as the second carrier.

In some embodiments, the second terminal 102 may select a fourth carrier from the first carrier according to a default carrier in the first carrier. Exemplarily, the fourth carrier may be selected from the default carrier. Exemplarily, the default carrier may refer to a carrier recommended for priority use. Exemplarily, the default carrier may be one or more. Thus, by selecting the second carrier according to the default carrier in the first carrier, the sidelink data is preferentially sent using the default carrier, which may reduce the loss rate of data packets and improve the communication quality.

In some embodiments, the AS layer of the second terminal 102 may receive configuration information sent by a higher layer of the second terminal 102, wherein the configuration information may include a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address, and the configuration information may indicate a default carrier in the first carrier. According to the configuration information, the third carrier corresponding to the first target address and/or the default carrier in the third carrier may be determined. Exemplarily, the third carrier corresponding to the first target address may be determined based on a mapping relationship between the first service and the third carrier and/or a mapping relationship between the first service and the first target address. Exemplarily, the higher layer may be a V2X layer.

For example, the first target address associated with the first service a1 is b1, and the first service a1 corresponds to carriers c1, c2, c3, and c4, then the carriers corresponding to the first target address b1 are c1, c2, c3, and c4. Exemplarily, the upper layer of the second terminal 102 can indicate that carriers c2 and c3 are default carriers. Exemplarily, when indicating the third carrier corresponding to the first service a1, such as c1, c2, c3, and c4, the upper layer of the second terminal 102 can indicate whether c1, c2, c3, and c4 are default carriers through additional indication information, such as additional bits. When a certain carrier has an additional bit indication, it indicates that the carrier is the default carrier. When a certain carrier does not have an additional bit indication, it indicates that the carrier is not the default carrier.

It should be noted that, in the present disclosure, other forms may also be used to indicate the default carrier in the third carrier, and the present disclosure does not make any specific limitation.

In some embodiments, the second terminal 102 may determine the third carrier corresponding to the first target address determined in the configuration information as the first carrier corresponding to the first target address, and determine the default carrier of the third carrier as the default carrier among the first carriers.

In some embodiments, the network device may determine the default carrier in the fifth carrier and configure it to the second terminal 102, and the second terminal 102 may obtain the fifth carrier configured by the network device and the default carrier in the fifth carrier, thereby determining the fifth carrier and the default carrier in the fifth carrier according to the configuration of the network device. Exemplarily, the network device may notify the second terminal 102 through RRC signaling. Exemplarily, if the second terminal 102 is in an RRC connected state, the configuration may be obtained through dedicated signaling. Exemplarily, if the second terminal 102 is in an RRC idle state or an RRC dormant state, the second terminal 102 may obtain the configuration through SIB. Exemplarily, if the second terminal 102 is in OOC, the second terminal 102 may obtain the configuration through pre-configuration. Exemplarily, the network device may carry the default carrier through sl-FreqInfoList.

In some embodiments, the first terminal 101 may determine the fifth carrier configured by the network device as the first carrier corresponding to the first target address, and determine the default carrier of the fifth carrier as the default carrier among the first carriers.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address and a default carrier among the first carriers according to the configuration of a high layer and the configuration of a network device.

In some embodiments, the second terminal 102 may determine the first carrier corresponding to the first target address according to the intersection of the third carrier corresponding to the first target address determined by the high-level configuration and the fifth carrier configured by the network, and the second terminal 102 may determine the default carrier in the first carrier according to the default carrier in the third carrier indicated by the high-level configuration and the default carrier in the fifth carrier configured by the network device. Optionally, for a first carrier, if the high-level configuration and the network configuration of whether the first carrier is the default carrier are different, the second terminal 102 may implement the decision to determine whether the first carrier is the default carrier according to the high-level configuration, or to determine whether the first carrier is the default carrier according to the network configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the second terminal 102 determines whether the first carrier is the default carrier according to the network device configuration. Exemplarily, for a first carrier, if the high-level configuration and the network device configuration of whether the first carrier is the default carrier are different, the second terminal 102 determines whether the first carrier is the default carrier according to the high-level configuration.

For example, the second terminal 102 determines that the first target address associated with the first service a1 is b1 according to the high-level configuration, and the first service a1 corresponds to carriers c1, c2, c3, and c4. Then the third carrier corresponding to the first target address b1 is determined to be c1, c2, c3, and c4. The first terminal determines that the fifth carrier supporting the sending and/or receiving of side link data is c2, c3, and c4 according to the configuration of the network device, and d1. The second terminal 102 determines that the first carrier corresponding to the first target address is c2, c3, and c4. The second terminal 102 determines the default carrier among the first carriers c2, c3, and c4 through high-level configuration and network device configuration. For example, both the high-level configuration and the network configuration indicate that carrier c3 and carrier c4 are the default carriers, the high-level configuration indicates that c2 is the default carrier, and the network device configuration indicates that c2 is not the default carrier. If it is determined based on the high-level configuration whether c2 is the default carrier, then it can be determined that carrier c2 is the default carrier, and thus it can be determined that the default carriers in the first carrier are carrier c2, carrier c3, and carrier c4. If it is determined based on the network device configuration whether c2 is the default carrier, then it can be determined that carrier c2 is not the default carrier, and thus it can be determined that the default carriers in the first carrier are carrier c3 and carrier c4.

In some embodiments, the second terminal 102 can determine the second carrier in combination with its own transmission and/or reception capabilities on the first carrier. Exemplarily, the default carriers among the first carriers c2, c3, and c4 are c2 and c3, and the second terminal 102 supports transmission and/or reception on two carriers at the same time. The second terminal 102 determines carrier c2 and carrier c3 as the second carrier. Thus, the terminal selects the second carrier in combination with its own transceiver capabilities on the first carrier, thereby using the second carrier to send sidelink data, which can reduce the loss rate of data packets and improve communication quality.

In some possible implementations, if the second terminal 102 configures at a high level a mapping relationship between the first service and the third carrier and/or a default carrier in the third carrier, and/or a mapping relationship between the first service and the first target address, and the network device configures a fifth carrier but does not indicate a default carrier in the fifth carrier, the second terminal 102 may take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the high-level configuration, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 at the high level, the first service a1 corresponds to the third carriers c1, c2, c3, c4, and the default carriers among the third carriers c1, c2, c3, c4 (for example, carrier c2 and carrier c3) are configured, then the second terminal 102 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, c4 according to the high-level configuration, and the second terminal 102 determines the fifth carrier supporting the sending and/or receiving of the sidelink data according to the configuration of the network device. For c2, c3, c4, d1, the second terminal 102 can take the intersection carrier c2, c3, c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, c4, and the default carrier among the carriers c2, c3, c4 is determined according to the high-level configuration. The default carrier among the first carriers c2, c3, c4 is carrier c2 and carrier c3. The second terminal 102 supports sending and/or receiving on 2 carriers at the same time. The second terminal 102 determines carrier c2 and carrier c3 as the second carrier.

In some possible implementations, if the second terminal 102 configures a mapping relationship between the first service and the third carrier, and/or a mapping relationship between the first service and the first target address at a high level, and the network device configures a fifth carrier and/or a default carrier in the fifth carrier, the second terminal 102 can take the intersection of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, determine the default carrier in the first carrier according to the configuration of the network device, and determine the second carrier according to the default carrier in the first carrier, and/or its own sending and/or receiving capabilities on the first carrier.

For example, the second terminal 102 configures the first target address associated with the first service a1 to be b1 in the high-level configuration, and the first service a1 corresponds to the third carriers c1, c2, c3, and c4. Then the second terminal 102 can determine that the third carrier corresponding to the first target address b1 is c1, c2, c3, and c4 according to the high-level configuration. The first terminal determines that the fifth carrier supporting sending and/or receiving side link data is c2, c3, c4, and d1 according to the configuration of the network device, and determines the default carrier in the fifth carrier (for example, carrier c3 and carrier c4). The second terminal 102 can take the intersection carriers c2, c3, and c4 of the third carrier and the fifth carrier as the first carrier corresponding to the first target address, that is, the first carrier is c2, c3, and c4, and determine the default carrier among the carriers c2, c3, and c4 according to the configuration of the network device. The default carrier among the first carriers c2, c3, and c4 is carrier c3 and carrier c4. The second terminal 102 supports sending and/or receiving on two carriers at the same time, and the second terminal 102 determines carrier c3 and carrier c4 as the second carrier. It should be noted that, in the present disclosure, the above-mentioned scheme for determining the priority of the first carrier and the scheme for determining the default carrier in the first carrier can be executed either one or at the same time, and the present disclosure does not limit this.

Step S4402: Receive sidelink data associated with the first target address via a fourth carrier.

In some embodiments, the second terminal 102 may receive the sidelink data associated with the first target address via the fourth carrier. Exemplarily, if the fourth carrier is a carrier with a higher priority than the set priority in the first carrier, the second terminal 102 may preferentially receive the sidelink data associated with the first target address on the carrier with the higher priority. Exemplarily, if the fourth carrier is a default carrier in the first carrier, the second terminal 102 may preferentially receive the sidelink data associated with the first target address on the default carrier.

In some embodiments, the second terminal 102 may receive the indication information sent by the first terminal 101, and receive the sidelink data associated with the first target address according to the indication information. Exemplarily, the second terminal 102 may receive the sidelink data associated with the first target address on a carrier supported by the first terminal 101. Exemplarily, the second terminal 102 may receive the sidelink data associated with the first target address on a carrier preferentially sent by the first terminal 101.

In some embodiments, the first terminal 101 can obtain the mapping relationship between the LCH priority and the carrier. If the data packet contains an LCH of a certain priority, the first terminal 101 can give priority to sending the data packet on the carrier corresponding to the LCH priority, and the second terminal 102 can give priority to receiving the data packet on the carrier corresponding to the high LCH priority. The mapping relationship between the LCH priority and the carrier is configured or pre-configured by the network device. Exemplarily, if the first terminal 101 is in the RRC connected state, the configuration can be obtained through dedicated signaling. Exemplarily, if the first terminal 101 is in the RRC idle state or the RRC dormant state, the first terminal 101 can obtain the configuration through the SIB. Exemplarily, if the first terminal 101 is in OOC, the first terminal 101 can obtain the configuration through pre-configuration.

The communication method involved in the embodiment of the present disclosure may include at least one of step S4401 to step S4402. For example, step S4401 may be implemented as an independent embodiment, step S4402 may be implemented as an independent embodiment, and step S4401 and step S4402 may be implemented as independent embodiments, but are not limited thereto.

In this implementation manner or example, unless there is any contradiction, each step can be independent, combined arbitrarily or exchanged in order, and the optional methods or optional examples can be combined arbitrarily.

FIG5 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG5, the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the communication system 100 includes a first terminal 101 and a second terminal 102. The method includes:

Step S5101: The first terminal 101 selects a second carrier from the first carrier corresponding to the first target address.

The optional implementation of step S5101 can refer to the optional implementation of step S2101 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

Step S5102: The second terminal 102 selects a fourth carrier from the first carrier corresponding to the first target address.

The optional implementation of step S5102 can refer to the optional implementation of step S2102 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

Step S5103: The first terminal 101 sends sidelink data associated with the first target address to the second terminal 102 via the second carrier.

The optional implementation of step S5103 can refer to the optional implementation of step S2103 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

In some embodiments, the above method may include the method described in the above embodiments of the communication system side, the first terminal side, the second terminal side, etc., which will not be repeated here.

In this implementation mode or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other implementation modes or other examples.

The following is an exemplary introduction to the above method.

Optional embodiment: for the target layer 2 address associated with the broadcast multicast service, a carrier priority list is defined, and the sending terminal preferentially sends on the carrier with a high priority, and the receiving terminal preferentially receives on the carrier with a high priority.

Optionally, the upper layer can indicate the priority of the frequency when providing the mapping relationship from service to frequency. The AS layer determines the mapping of the target layer 2 address associated with the broadcast/multicast service to the frequency based on the mapping relationship from service to target L2ID and service to frequency, and determines the priority of the frequency mapped to the target layer 2 address. Exemplarily, the upper layer can determine the priority of the frequency based on the QoS attributes of the service supported by the frequency, such as PQI, defaultpriority, Packet Delay Budget, Packet Error Rate, etc. For example, if the service supported by the frequency is low defaultpriority (the lower the higher the priority), low PDB (delay-sensitive service), etc., the frequency is determined as high priority.

Optionally, the network device determines the priority of the frequency and then configures it to the terminal device through RRC signaling. For example, a terminal device in the RRC CONNECTED/IDLE/INACTIVE state can obtain the configuration through SIB, and a terminal device in the OOC state can obtain the configuration through pre-configuration. For example, the frequency and the priority corresponding to the frequency can be carried through sl-FreqInfoList.

Optionally, the terminal device determines the available frequencies of a layer 2 address associated with a broadcast multicast service based on the set of available frequencies configured by the high-level layer and the network device, and determines the priority of the available frequencies. For a frequency, if the priority of the high-level layer and the network device configuration is not the same, the UE can decide whether to execute the network configuration or the high-level layer configuration.

Optionally, for a broadcast or multicast service, the sending terminal gives priority to sending on the high-priority frequency corresponding to the target layer 2 address associated with the broadcast or multicast service, and the receiving terminal gives priority to receiving on the high-priority frequency. Exemplarily, the sending terminal may give priority to sending any data belonging to the target layer 2 address associated with the multicast or broadcast service on the high-priority frequency corresponding to the target layer 2 address associated with the broadcast or multicast service; exemplarily, the sending terminal may give priority to sending high-priority/low PDB/high reliability (low PER) data belonging to the target layer 2 address associated with the multicast or broadcast service on the high-priority frequency corresponding to the target layer 2 address associated with the broadcast or multicast service.

Optional embodiment: for the target layer 2 address associated with the broadcast multicast service, one or more default carriers/frequency bands are defined, and the sending terminal preferentially sends on the default carrier/frequency band, and the receiving terminal preferentially receives on the default carrier/frequency band.

Optionally, the upper layer can indicate one or more default frequencies of the service when providing the mapping relationship between service and frequency. The AS layer determines one or more default frequencies of the target layer 2 address associated with the broadcast/multicast service based on the mapping relationship between service and target L2ID and service and frequency.

Optionally, the network device determines one or more default frequencies, and then configures them to the terminal device through RRC signaling. For example, a terminal device in the RRC CONNECTED/IDLE/INACTIVE state can obtain the configuration through SIB, and a terminal device in the OOC state can obtain the configuration through pre-configuration. For example, the default frequency can be carried through sl-FreqInfoList.

Optionally, the terminal device determines the available frequencies of a layer 2 address associated with a broadcast multicast service based on the combination of the available frequencies configured by the high-level layer and the network device, and determines one or more default frequencies. If the default frequencies configured by the high-level layer and the network device are different, the UE can decide whether to execute the network configuration or the high-level layer configuration.

Optionally, for a broadcast or multicast service, the sending terminal gives priority to sending on the defaultfrequency corresponding to the target layer 2 address associated with the broadcast or multicast service, and the receiving terminal gives priority to receiving on the defaultfrequency. Exemplarily, the sending terminal may give priority to sending any data belonging to the target layer 2 address associated with the multicast or broadcast service on the defaultfrequency corresponding to the target layer 2 address associated with the broadcast or multicast service; exemplarily, the sending terminal may give priority to sending high priority/low PDB/high reliability (low PER) data belonging to the target layer 2 address associated with the multicast or broadcast service on the defaultfrequency corresponding to the target layer 2 address associated with the broadcast or multicast service.

Optional embodiment: define a LCH priority to carrier/frequency band mapping list, if the data packet contains an LCH of a certain priority, the sending terminal gives priority to sending on the corresponding carrier/frequency band, and the receiving terminal gives priority to receiving on the carrier/frequency band corresponding to the high LCH priority.

Optional embodiment: the sending terminal device broadcasts/multicasts the carrier/frequency band supported for sending and/or the carrier/frequency band preferred by the sending terminal through PC5 signaling, and the receiving terminal preferentially receives on the carrier/frequency band supported/preferred by the sending terminal.

Optionally, the exemplary PC5 signaling may be PC5MAC CE, or other PC5 signaling that can also be supported by broadcast or multicast. The PC5 signaling may be sent on a carrier/frequency band supported by both R16 and R17.

Optionally, a MAC CE is used to indicate whether transmission is supported on the carrier. Each bit of the MAC CE corresponds to whether the terminal supports transmission on the carrier, 1 indicates that transmission is supported on the carrier, and 0 indicates that transmission is not supported on the carrier. The bits of the MAC CE correspond to the carrier/frequency band identifier in ascending/descending order.

Optionally, a MAC CE is used to indicate whether to give priority to transmission on a carrier. Each bit of the MAC CE corresponds to whether the terminal supports giving priority to transmission on the carrier, 1 indicates that the terminal supports giving priority to transmission on the carrier, and 0 indicates that the terminal does not give priority to transmission on the carrier. The bits of the MAC CE correspond to the carrier/frequency band identifier in ascending/descending order.

In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

It should be understood that the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, instructions are stored in the memory, and the processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device. Alternatively, the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits. The hardware circuits may be understood as one or more processors; for example, in one implementation, the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits; for another example, in another implementation, the hardware circuits may be implemented by programmable logic devices (PLDs), and field programmable gate arrays (FPGAs) may be used as an example, which may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in part by software called by the processor, and the rest by hardware circuits.

In the disclosed embodiments, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.

FIG6A is a schematic diagram of the structure of the first terminal proposed in an embodiment of the present disclosure. As shown in FIG6A, the first terminal 6100 may include: at least one of a transceiver module 6101, a processing module 6102, etc. In some embodiments, the processing module is used to select a second carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, and the first service is a broadcast service or a multicast service; the transceiver module is used to send sidelink data through the second carrier, and the sidelink data is associated with the first target address. Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and/or receiving (for example, step S2103, but not limited thereto) performed by the first terminal 101 in any of the above methods, which will not be repeated here. Optionally, the processing module is used to execute at least one of the other steps (for example, step S2101, but not limited thereto) performed by the first terminal 101 in any of the above methods, which will not be repeated here.

FIG6B is a schematic diagram of the structure of the second terminal proposed in an embodiment of the present disclosure.

As shown in FIG6B , the second terminal 6200 may include: at least one of a transceiver module 6201, a processing module 6202, etc. In some embodiments, the processing module is used to select a fourth carrier from the first carrier corresponding to the first target address, wherein the first target address is associated with a first service, the first service is a broadcast service or a multicast service, the fourth carrier is partially or completely the same as the second carrier, and the second carrier is a carrier selected by the first terminal from the first carrier; the transceiver module is used to receive sidelink data through the fourth carrier, and the sidelink data is associated with the first target address. Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and/or receiving (for example, step S4102, but not limited thereto) executed by the second terminal 102 in any of the above methods, which will not be repeated here. Optionally, the processing module is used to execute at least one of the other steps (for example, step S2102, but not limited thereto) executed by the second terminal 102 in any of the above methods, which will not be repeated here.

In some embodiments, the transceiver module may include a sending module and/or a receiving module, and the sending module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

In some embodiments, the processing module can be a module or include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be replaced with the processor.

7A is a schematic diagram of the structure of a communication device proposed in an embodiment of the present disclosure. The communication device 7100 may be a network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.), or a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. The communication device 7100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

As shown in FIG. 7A , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The communication device 7100 is used to execute any of the above methods.

In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memory 7102 may also be outside the communication device 7100.

In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2102, but not limited thereto), and the processor 7101 performs at least one of the other steps (for example, step S2101, but not limited thereto).

In some embodiments, the transceiver may include a receiver and/or a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

In some embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102, and the interface circuit 7104 may be used to receive signals from the memory 7102 or other devices, and may be used to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

The communication device 7100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

Fig. 7B is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure. In the case where the communication device 7100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 7200 shown in Fig. 7B, but the present disclosure is not limited thereto.

The chip 7200 includes one or more processors 7201, and the chip 7200 is used to execute any of the above methods.

In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203, and the interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and the interface circuit 7202 can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

In some embodiments, the interface circuit 7202 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2103, but not limited to this), and the processor 7201 performs at least one of the other steps (for example, step S2101, but not limited to this).

In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memory 7203 may be outside the chip 7200.

The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

The present disclosure also proposes a program product, which, when executed by the communication device 7100, enables the communication device 7100 to execute any of the above methods. Optionally, the program product is a computer program product.

The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

Claims (23)

A communication method, characterized in that it is executed by a first terminal, and the method comprises: Selecting a second carrier from a first carrier corresponding to a first target address, where the first target address is associated with a first service, and the first service is a broadcast service or a multicast service; Sidelink data is transmitted via the second carrier, the sidelink data being associated with the first target address. The method according to claim 1, wherein selecting the second carrier from the carrier corresponding to the first target address comprises: The second carrier is selected from the first carrier according to the priority of the first carrier. The method according to claim 1, wherein selecting the second carrier from the carrier corresponding to the first target address comprises: The second carrier is selected from the first carriers according to a default carrier among the first carriers. The method according to any one of claims 1 to 3, further comprising: receiving configuration information sent by a high layer of the first terminal, where the configuration information includes a mapping relationship between the first service and a third carrier and/or a mapping relationship between the first service and the first target address; Determine the third carrier according to the configuration information; The first carrier is determined according to the third carrier. The method according to claim 4, further comprising: The configuration information indicates a priority of the third carrier, and the priority of the first carrier is determined according to the priority of the third carrier. The method according to claim 4 or 5, characterized in that it also includes: The configuration information indicates a default carrier among the third carriers, and a default carrier among the first carriers is determined according to the default carrier among the third carriers. The method according to any one of claims 4 to 6, further comprising: The first terminal higher layer determines the priority of the third carrier according to the quality of service attribute of the first service. The method according to any one of claims 1 to 7, wherein sending the sidelink data through the second carrier comprises: sending a first data packet through the second carrier, where the first data packet is a data packet belonging to the first target address; or A second data packet belonging to the first target address is sent through the second carrier, and a priority of the second data packet is higher than a preset priority. The method according to any one of claims 1 to 8, further comprising: Send instruction information; The indication information is used to indicate at least one of the following: the first carrier; the second carrier. A communication method, characterized in that it is performed by a second terminal, and the method comprises: Selecting a fourth carrier from a first carrier corresponding to a first target address, where the first target address is associated with a first service, where the first service is a broadcast service or a multicast service, where the fourth carrier is partially or completely identical to a second carrier, and where the second carrier is a carrier selected by the first terminal from the first carrier; Sidelink data is received via the fourth carrier, the sidelink data being associated with the first target address. The method according to claim 10, wherein the selecting the fourth carrier from the first carrier corresponding to the first target address comprises: The fourth carrier is selected from the first carrier according to the priority of the first carrier. The method according to claim 10, wherein the selecting the fourth carrier from the first carrier corresponding to the first target address comprises: The fourth carrier is selected from the first carriers according to a default carrier among the first carriers. The method according to any one of claims 10 to 12, further comprising: receiving configuration information sent by a high layer of the second terminal, where the configuration information includes a mapping relationship between the first service and a third carrier and/or a mapping relationship between the first service and the first target address; Determine the third carrier according to the configuration information; The first carrier is determined according to the third carrier. The method according to claim 13, further comprising: The configuration information indicates a priority of the third carrier, and the priority of the first carrier is determined according to the priority of the third carrier. The method according to claim 13 or 14, further comprising: The configuration information indicates a default carrier among the third carriers, and a default carrier among the first carriers is determined according to the default carrier among the third carriers. The method according to any one of claims 13 to 15, further comprising: The second terminal higher layer determines the priority of the third carrier according to the quality of service attribute of the first service. The method according to any one of claims 10 to 16, further comprising: receiving instruction information; The indication information is used to indicate at least one of the following: the first carrier; the second carrier. A first terminal, characterized by comprising: a processing module, configured to select a second carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, and the first service is a broadcast service or a multicast service; A transceiver module is used to send side link data through the second carrier, and the side link data is associated with the first target address. A second terminal, characterized by comprising: a processing module, configured to select a fourth carrier from a first carrier corresponding to a first target address, wherein the first target address is associated with a first service, the first service is a broadcast service or a multicast service, the fourth carrier is partially or completely the same as the second carrier, and the second carrier is a carrier selected by the first terminal from the first carrier; The transceiver module is used to receive sidelink data through the fourth carrier, and the sidelink data is associated with the first target address. A communication device, comprising: one or more processors; Wherein, the communication device is used to execute the communication method according to any one of claims 1-9. A communication device, comprising: one or more processors; Wherein, the communication device is used to execute the communication method described in any one of claims 10-17. A communication system, comprising: A first terminal, configured to execute the communication method according to any one of claims 1 to 9, The second terminal is used to execute the communication method according to any one of claims 10-17. A storage medium storing instructions, characterized in that when the instructions are executed on a communication device, the communication device executes the communication method as claimed in any one of claims 1 to 9 or claims 10 to 17.