WO2025112005A1 - Communication method, terminal, network device, communication system, and storage medium - Google Patents

Abstract

Provided in the embodiments of the present disclosure are a communication method, a network device, a terminal, a communication system, and a storage medium. The method comprises: sending first information to a terminal, wherein the first information is used for indicating at least one of the following: prohibiting the terminal from selecting a first cell as a target cell for radio resource control (RRC) connection reestablishment in a cell selection process after a cell handover failure, and the first cell comprises at least one of the following: an original cell before cell handover; a cell in a network energy-saving (NES) state; triggering NES-based cell handover; and a configuration parameter of conditional handover (CHO) of NES-based triggering. Therefore, cell handover failures are reduced, and the reliability of cell handover is improved.

Description

Communication method, terminal, network device, communication system and storage medium Technical Field

The present disclosure relates to the field of communication technology, and in particular to a communication method, a terminal, a network device, a communication system and a storage medium.

Background Art

During the cell handover process, if the cell handover fails, the terminal is triggered to perform cell selection. After selecting a suitable cell, the Radio Resource Control (RRC) connection reestablishment process is initiated. For the conditional handover (CHO) scenario, if the handover fails, the terminal is triggered to perform the cell selection process. If the target cell selected by the cell is a candidate cell for CHO, the terminal can perform the CHO process to the target cell. If CHO fails again, the cell selection process is performed, and a suitable cell is selected, and the RRC connection reestablishment process is initiated.

Summary of the invention

During the cell switching process, there may be a switching failure, and the reliability of the cell switching is low.

Embodiments of the present disclosure provide a communication method, a terminal, a network device, a communication system, and a storage medium.

According to a first aspect of an embodiment of the present disclosure, a communication method is provided, the method being executed by a network device, the method comprising:

Sending first information to a terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

According to a second aspect of an embodiment of the present disclosure, a communication method is provided, the method being executed by a terminal, the method comprising:

Determine a target cell for RRC connection reestablishment based on the first information;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

According to a third aspect of an embodiment of the present disclosure, a communication method is provided, the method comprising:

The network device sends first information to the terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, the network device comprising:

The transceiver module is configured as follows:

Sending first information to a terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

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

The processing module is configured as follows:

Determine a target cell for RRC connection reestablishment based on the first information;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

According to a sixth aspect of an embodiment of the present disclosure, a communication system is provided, wherein the communication system includes a network device and a terminal; The network device is configured to implement the method described in the first aspect, and the terminal is configured to implement the method described in the second aspect.

According to a seventh aspect of an embodiment of the present disclosure, a network device is provided, the network device comprising:

one or more processors;

The network device is used to execute the method described in the first aspect.

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

one or more processors;

The terminal is used to execute the method described in the second aspect.

According to a ninth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method provided in the first aspect and/or the second aspect.

The technical solution provided by the embodiments of the present disclosure reduces the situation of cell switching failure and improves the reliability of cell switching.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for describing the embodiments are introduced below. The following drawings are only some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

FIG. 1a is a schematic diagram of a communication system architecture according to an exemplary embodiment;

FIG1b is a schematic diagram of a communication system architecture according to an exemplary embodiment;

FIG2a is a schematic flow chart of a communication method according to an exemplary embodiment;

FIG3a is a flow chart of a communication method according to an exemplary embodiment;

FIG4a is a flow chart of a communication method according to an exemplary embodiment;

FIG4b is a flow chart of a communication method according to an exemplary embodiment;

FIG5a is a flow chart of a communication method according to an exemplary embodiment;

FIG6a is a schematic diagram showing the structure of a network device according to an exemplary embodiment;

FIG6b is a schematic diagram showing the structure of a terminal according to an exemplary embodiment;

FIG7a is a schematic structural diagram of a UE according to an exemplary embodiment;

Fig. 7b is a schematic diagram showing the structure of a communication device according to an exemplary embodiment.

DETAILED DESCRIPTION

Embodiments of the present disclosure provide a communication method, a network device, a terminal, a communication system, and a storage medium.

In a first aspect, an embodiment of the present disclosure provides sending first information to a terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

In the above embodiment, after the terminal receives the first information, at least one of the following can be executed: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection; in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell; triggering a cell switching based on NES; executing a cell switching based on the configuration parameters of the conditional switching CHO triggered by NES.

In combination with some embodiments of the first aspect, in some embodiments, sending the first information to the terminal includes:

Determine to trigger cell switching based on a network energy saving NES mode, and send the first information to the terminal;

Wherein, the NES method includes at least one of the following:

Activate discontinuous transmission DTX of the cell;

Activate cell discontinuous reception DRX;

The neighborhood is closed.

In the above embodiment, the first information may be sent to the terminal in a scenario where cell switching is triggered based on different NES modes.

In combination with some embodiments of the first aspect, in some embodiments, the first information is used to indicate that: the cell switching is a switching triggered based on the NES method.

In the above embodiment, after receiving the first information, the terminal may determine that the cell switching is a switching triggered based on the NES mode.

In combination with some embodiments of the first aspect, in some embodiments, sending the first information to the terminal includes:

Sending switching command information to the terminal;

The switching command information includes the first information.

In the above embodiment, the first information may be sent to the terminal via a cut command message.

In combination with some embodiments of the first aspect, in some embodiments, the switching command information is an RRC reconfiguration message.

In combination with some embodiments of the first aspect, in some embodiments, the original cell is a cell in the NES state.

In combination with some embodiments of the first aspect, in some embodiments, the cell in the NES state includes at least one of the following:

A cell in DTX mode;

The cell DTX mode is in the activated state;

A cell in DRX mode;

The cell DRX mode is in the activated state;

In a community where the community is closed.

In combination with some embodiments of the first aspect, in some embodiments, sending the first information to the terminal includes:

Sending configuration information of NES CHO to the terminal;

The configuration information includes the first information.

In the above embodiment, the first information can be sent to the terminal through the configuration information of NES CHO.

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

Sending fourth information to the terminal, where the fourth information is used to instruct the network device to enter the NES state.

In the above embodiment, the terminal may determine that the network device enters the NES state based on the fourth information.

With reference to some embodiments of the first aspect, in some embodiments, the configuration information is measurement reporting configuration information.

In combination with some embodiments of the first aspect, in some embodiments, the measurement reporting configuration information includes NES event information.

In combination with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following:

Sending second information to a neighboring base station, wherein the second information indicates a NES mode of a neighboring cell;

Sending third information to the terminal, wherein the third information indicates the NES mode of the serving cell.

In the above embodiment, the neighboring base station and the serving cell can obtain the NES mode through the second information and the third information respectively.

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

Determine a target cell for RRC connection reestablishment based on the first information;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

In combination with some embodiments of the second aspect, in some embodiments, determining the target cell for RRC connection reestablishment based on the first information includes at least one of the following:

In the cell selection process after the cell handover fails, the original cell before the cell handover is not selected as the target cell for RRC connection reestablishment;

In the cell selection process after the cell handover fails, the cell in the NES state is not selected as the target cell.

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

Receive the first information sent by the network device.

In combination with some embodiments of the second aspect, in some embodiments, the first information is information sent by the network device after determining that a cell switching is triggered based on a network energy saving NES mode; wherein the NES mode includes at least one of the following:

Activate discontinuous transmission DTX of the cell;

Activate cell discontinuous reception DRX;

The neighborhood is closed.

In combination with some embodiments of the second aspect, in some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES method.

In conjunction with some embodiments of the second aspect, in some embodiments, the receiving first information sent by the network device includes:

Receiving switching command information sent by the network device;

The switching command information includes the first information.

In combination with some embodiments of the second aspect, in some embodiments, the switching command information is an RRC reconfiguration message.

In combination with some embodiments of the second aspect, in some embodiments, the original cell is a cell in the NES state.

In conjunction with some embodiments of the second aspect, in some embodiments, the cell in the NES state includes at least one of the following:

A cell in DTX mode;

The cell DTX mode is in the activated state;

A cell in DRX mode;

The cell DRX mode is in the activated state;

In a community where the community is closed.

In conjunction with some embodiments of the second aspect, in some embodiments, the receiving the first information sent by the network device includes:

Receiving configuration information of NES CHO sent by the network device;

The configuration information includes the first information.

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

Fourth information sent by the network device is received, where the fourth information is used to instruct the network device to enter the NES state.

In combination with some embodiments of the second aspect, in some embodiments, the configuration information is measurement reporting configuration information.

In combination with some embodiments of the second aspect, in some embodiments, the measurement reporting configuration information includes NES event information.

In combination with some embodiments of the second aspect, in some embodiments, determining a target cell for radio resource control RRC connection reestablishment based on the first information includes:

Determine that NES CHO execution fails and the value indicated by the first information field corresponding to the NES event information is a first value, and determine the target cell for radio resource control RRC connection reconstruction based on the first information.

In combination with some embodiments of the second aspect, in some embodiments, determining that the value indicated by the first information field corresponding to the NES event information is a first value, and determining the target cell for radio resource control RRC connection reestablishment based on the first information includes:

Determine that the execution of NES CHO fails, the value indicated by the first information field corresponding to the NES event information is a first value, and the reason for CHO triggering is that the condition corresponding to the set NES event information is met, and determine the target cell for RRC connection reconstruction based on the first information.

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

Receive the first information sent by the physical layer of the terminal.

In combination with some embodiments of the second aspect, in some embodiments, determining a target cell for radio resource control RRC connection reestablishment based on the first information includes:

Determine that a radio link failure RLF or a handover failure HOF occurs, receive the first information sent by the physical layer of the terminal, and determine the target cell for RRC connection reconstruction based on the first information.

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

Receive third information sent by the network device, wherein the third information indicates the NES mode of the serving cell.

In a third aspect, an embodiment of the present disclosure provides a communication method, the method comprising:

The network device sends first information to the terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

In a fourth aspect, an embodiment of the present disclosure provides a network device, the network device comprising:

The transceiver module is configured as follows:

Sending first information to a terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

In a fifth aspect, an embodiment of the present disclosure provides a terminal, the terminal comprising:

The processing module is configured as follows:

Determine a target cell for RRC connection reestablishment based on the first information;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

In a sixth aspect, an embodiment of the present disclosure provides that the communication system includes a network device and a terminal; the network device is configured to implement the method described in the first aspect, and the terminal is configured to implement the method described in the second aspect.

In a seventh aspect, an embodiment of the present disclosure provides a network device, the network device comprising:

one or more processors;

Among them, the network device is used to execute the method provided by the first aspect.

In an eighth aspect, an embodiment of the present disclosure provides a terminal, the terminal including:

one or more processors;

The terminal is used to execute the method provided by the second aspect.

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

In a tenth 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 optional implementation of the first and second aspects.

In an eleventh 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 optional implementation of the first and second aspects.

In a twelfth 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 optional implementation of the first and second aspects above.

It is understandable that the above network devices, terminals, communication systems, storage media, program products, computer programs, chips or chip systems are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods, which will not be repeated here.

The embodiments of the present disclosure provide a communication method, a network device, a terminal, a communication system and a storage medium. In some embodiments, the communication method and the information indication method, the information processing method, the information transmission method and other terms can be replaced with each other, and the communication system, the information processing system and other terms can be replaced with each other.

The embodiments of the present disclosure are not exhaustive, but are only 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 a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

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, the terms "at least one of", "one or more", "a plurality of", "multiple", etc. 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 limit the position, order, priority, quantity or content of the description objects. The description of the description object can be found in the claims or the description in the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the description object is a "field", the ordinal number before the "field" in "first field" and "second field" does not limit the position or order between the "fields", and "first" and "second" do not limit the modified Whether the "fields" are in the same message does not limit the order of the "first field" and the "second field". For another example, if the description object is "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 ordinal numbers and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", the "first information" and the "second information" can be the same information or different information, and their contents can 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, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

In some embodiments, devices and equipment may be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they may also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station" and in some embodiments may also be understood as "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission and/or reception point (transmission/reception point, TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (bandwidth part, BWP)", etc.

In some embodiments, the term "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal (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, etc.

In some embodiments, 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.

In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.

FIG. 1 a is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

As shown in FIG. 1 a , a communication system 100 includes a terminal 101 and a network device 102 .

In some embodiments, the network device 102 may include at least one of an access network device 1021 and a core network device 1022 .

In some embodiments, the access network device 1021 may be a satellite access network device.

In some embodiments, the core network device 1022 may be a core network device or a proxy core network device.

In some embodiments, the terminal includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and a wireless terminal device in a smart home. At least one, but not limited to.

In some embodiments, the access network device may be, 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 Wi-Fi 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 access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, 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 the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of the Evolved Packet Core (EPC), the 5G Core Network (5GCN), and the 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 provided by 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 provided by 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 FIG. 1a, or part of the subject, but are not limited thereto. The subjects shown in FIG. 1a are examples, and the communication system may include all or part of the subjects in FIG. 1a, or may include other subjects other than FIG. 1a, 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 ... 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.

5G has been introduced in response to people's pursuit of speed, latency, high-speed mobility, energy efficiency, as well as the diversity and complexity of services in future life.

In some embodiments, the main application scenarios of 5G include: enhanced mobile ultra-wideband (eMBB, Enhanced Mobile Broadband), Ultra Reliable Low Latency Communication (URLLC, Ultra Reliable Low Latency Communication) and massive machine type communication (mMTC, Massive Machine Type Communication).

In some embodiments, eMBB still aims at users obtaining multimedia content, services and data, and its demand is growing rapidly. On the other hand, since eMBB may be deployed in different scenarios, such as indoors, in urban areas and in rural areas, its capabilities and requirements vary greatly, so it cannot be generalized and must be analyzed in detail in combination with specific deployment scenarios.

In some embodiments, typical applications of URLLC include: industrial automation, power automation, remote medical operations (surgery) and traffic safety assurance, etc.

In some embodiments, typical features of mMTC include: high connection density, small data volume, latency-insensitive services, low cost of modules and long service life, etc.

After the introduction of 5G technology, the energy consumption of 5G base stations is four times that of LTE base stations, so network energy saving is an important means for operators to reduce the cost of operating 5G systems.

In some embodiments, in order to reduce network energy consumption, the network energy saving project is started. The four NES functions supported include:

SSB-less Scell;

cell DTX/DRX;

Antenna port adaptation;

PDSCH transmission power adaptation.

In some embodiments, for a network energy-saving method of discontinuous receiving (DTX) or discontinuous transmitting (DRX) of a cell, the network side configures the DTX or DRX working mode of the cell through dedicated signaling of Radio Resource Control (RRC), that is, configures a period, offset and/or duration (onduration). During the onduration, the cell is in an activated state and can receive and send data. The rest of the time is the inactive time. In principle, the network side does not perform data reception and transmission, except for special circumstances, for example, the transmission processes such as synchronization signal block (SSB, SS and PBCH Block), master information block (MIB, Master Information Block) message, system information block (SIB, System Information Block) message, paging message (paging) and random access channel (RACH, Random Access Channel) message are not affected and proceed normally.

In some embodiments, when the cell enters the Network Energy Saving (NES) mode, that is, activates cell DTX or DRX, the UE needs to perform conditional handover (CHO). In order to facilitate the UE to perform CHO, the network side may configure NES CHO for the UE. Compared with the original CHO, the measurement events (for example, A3, A4 and A5) of this NES CHO are easier to meet. Make the handover easier. In addition, in order to trigger the execution of NES CHO due to NES, the network side will issue an instruction. When the handover instruction of the downlink control information (DCI) is received and the NES CHO meets the handover conditions, the terminal performs the handover.

In some embodiments, cell switching off is also supported, that is, the cell is closed, and the terminal is required to switch as soon as possible.

In some embodiments, due to cell DTX or DRX activation or cell switch off, the terminal supporting NES cannot work or cannot meet the high performance requirements of the terminal, so the terminal needs to switch to other cells. For this reason, CHO for NES is introduced, namely NES CHO (Conditional HandOver), and it is also agreed to trigger the switch based on the 1-bit instruction of DCI, that is, when the NES CHO switching condition is met and the DCI switching instruction from the network side is received, the switch is executed. For example, please refer to Figure 1b, the DCI is DCI format 2-9, that is, the DCI of cell DTX or DRX activation and deactivation is reused.

In some embodiments, since DCI 2-9 is group common DCI, for a cell that is a primary cell (Pcell), a bit can be carried based on the network side configuration indication. The bit is set to "1" to trigger NES CHO execution, and is set to "0" to not trigger NES CHO execution. The indication information block of a cell also includes cell DTX and cell DRX activation and deactivation indications. Whether there is a corresponding bit depends on whether cell DTX and cell DRX are configured for the UE.

In some embodiments, for legacy terminals or terminals that do not support NES, the UE can be allowed to leave the cell activating cell DTX or DRX or the cell switching off the cell through a traditional switching process.

In some embodiments, during the handover process, if the handover fails, the terminal is triggered to perform cell selection, and after selecting a suitable cell, an RRC connection reestablishment process is initiated.

In some embodiments, for the CHO scenario, if the handover fails, the terminal is triggered to execute the cell selection process. If the target cell selected is a candidate cell for CHO, the terminal can execute the CHO process to the target cell. If CHO fails again, the cell selection process is executed, and a suitable cell is selected, then the radio resource control (RRC, Radio Resource Control) connection reconstruction process is initiated.

It should be noted that after a handover fails, the terminal performs cell selection and may select the original cell of the handover, that is, a cell with cell DTX or DRX activated or a cell with cell switching off. This makes RRC reconstruction meaningless or even fails.

FIG2a is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2a, the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes:

Step S2101: The network device sends first information to the terminal.

In some embodiments, the terminal receives first information sent by the network device.

In some embodiments, the first information is used to indicate that: in the cell selection process after the cell handover failure, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection.

In some embodiments, the first cell includes at least one of the following: an original cell before cell switching; a cell in a network energy saving NES Status cell.

In some embodiments, the first information is used to indicate that: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection.

In some embodiments, the first information is used to indicate that: in a cell selection process after a cell handover failure, the terminal is prohibited from selecting a cell in a network energy saving NES state as the target cell.

In some embodiments, the first information is used to indicate: triggering NES-based cell switching.

In some embodiments, the first information is used to indicate: switching configuration parameters of the CHO based on a condition triggered by the NES.

In some embodiments, the first information is used to indicate that: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for radio resource control RRC connection reestablishment and triggering NES-based cell switching.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for radio resource control RRC connection reestablishment and the configuration parameters of the CHO are switched based on the NES triggered conditions.

In some embodiments, the first information is used to indicate that: in a cell selection process after a cell switching failure, the terminal is prohibited from selecting a cell in a network energy saving NES state as the target cell and triggering a NES-based cell switching.

In some embodiments, the first information is used to indicate that: in a cell selection process after a cell switching failure, the terminal is prohibited from selecting a cell in a network energy saving NES state as the target cell and triggering a NES-based cell switching.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection, and in the cell selection process after the cell switching failure, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection; in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection, in the cell selection process after the cell switching failure, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell, and the configuration parameters of the conditional switching CHO triggered by NES.

In some embodiments, it is determined that discontinuous transmission DTX triggers cell switching based on activating the cell, and the first information is sent to the terminal.

In some embodiments, it is determined that cell switching is triggered based on activating discontinuous reception DRX of the cell, and the first information is sent to the terminal.

In some embodiments, it is determined that a cell switching is triggered based on cell shutdown, and the first information is sent to the terminal.

In some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES mode.

In some embodiments, the NES method includes at least one of the following:

Activate discontinuous transmission DTX of the cell;

Activate cell discontinuous reception DRX;

Cell switching off.

In some embodiments, a switching command message is sent to the terminal; wherein the switching command message includes the first information.

In some embodiments, the switching command information is an RRC reconfiguration message (RRCReconfiguration message).

Exemplarily, reconfigurationWithSync includes first information.

In some embodiments, the original cell is a cell in the NES state.

In some embodiments, the cell in the NES state includes at least one of the following:

A cell in DTX mode;

The cell DTX mode is in the activated state;

A cell in DRX mode;

The cell DRX mode is in the activated state;

In a community where the community is closed.

In some embodiments, the cell switching is conditional switching CHO; configuration information of NES CHO is sent to the terminal; wherein the configuration information includes the first information.

In some embodiments, the network device sends fourth information to the terminal, and the fourth information is used to indicate that the network device enters the In some embodiments, the configuration information is measurement reporting configuration information (eg, ReportConfigNR).

In some embodiments, the measurement reporting configuration information includes NES event information (eg, nesEvent).

In some embodiments, second information is sent to a neighboring base station, wherein the second information indicates a NES mode of a neighboring cell.

In some embodiments, the second information is sent to the neighboring base station via system broadcast signaling or RRC signaling.

In some embodiments, third information is sent to the terminal, wherein the third information indicates the NES mode of the serving cell.

In some embodiments, the third information is sent to the serving cell via system broadcast signaling.

Step S2102: The terminal determines the target cell.

In some embodiments, a target cell for RRC connection reestablishment is determined based on the first information.

In some embodiments, the first information is determined to indicate: in the cell selection process after a cell switching failure (for example, timer T304 times out), the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the wireless resource control RRC connection; in the cell selection process after a cell switching failure, the original cell before the cell switching is not selected as the target cell for reestablishing the RRC connection.

In some embodiments, determining the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell, and in the cell selection process after the cell switching failure, the cell in the NES state is not selected as the target cell.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for wireless resource control RRC connection reconstruction and triggering NES-based cell switching, and in the cell selection process after the cell switching failure, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the wireless resource control RRC connection and switching the configuration parameters of CHO based on the NES triggered condition; in the cell selection process after the cell switching failure, the original cell before the cell switching is not selected as the target cell for reestablishing the RRC connection.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching, and in the cell selection process after the cell switching fails, the cell in the NES state is not selected as the target cell.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching, and in the cell selection process after the cell switching fails, the cell in the NES state is not selected as the target cell.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the wireless resource control RRC connection and in the cell selection process after the cell switching failure, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell, in the cell selection process after the cell switching failure, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction and in the cell selection process after the cell switching failure, the cell in the NES state is not selected as the target cell.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for wireless resource control RRC connection reconstruction, in the cell selection process after the cell switching failure, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching, in the cell selection process after the cell switching failure, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction, and in the cell selection process after the cell switching failure, the cell in the NES state is not selected as the target cell.

In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection, in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the cell in the network energy saving NES state as the target cell and the configuration parameters of the conditional switching CHO triggered by NES, in the cell selection process after the cell switching failure, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction, and in the cell selection process after the cell switching failure, the cell in the NES state is not selected as the target cell.

In some embodiments, it is determined that execution of NES CHO fails and the value indicated by the first information field corresponding to the NES event information is a first value (for example, indicating True), and the target cell for reestablishing the radio resource control RRC connection is determined based on the first information.

In some embodiments, it is determined that the NES CHO fails to be executed, the value indicated by the first information field corresponding to the NES event information is a first value, and the reason for the CHO triggering is that the condition corresponding to the set NES event information is met, and the target cell for RRC connection reconstruction is determined based on the first information.

It should be noted that the following embodiments of step S2102 may not be based on step S2101, that is, the following embodiments of step S2102 may not depend on the execution of step S2101.

In some embodiments, the terminal receives the first information sent by a physical layer of the terminal.

In some embodiments, the first information indicates that the cell switching is a NES-based switching.

In some embodiments, the terminal determines that a radio link failure (RLF) or a handover failure (HOF) occurs, and receives the first information sent by the physical layer of the terminal, and determines the target cell for RRC connection reconstruction based on the first information.

Step S2103: Perform RRC connection reestablishment based on the target cell.

In some embodiments, the term "information" can be interchangeably with terms such as "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "field", and "data".

In some embodiments, the term "send" can be interchangeable with terms such as "transmit", "report", and "transmit".

The information indication method involved in the embodiments 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, and step S2103 may be implemented as an independent embodiment. For example, step S2101 combined with step S2102 may be implemented as an independent embodiment, and step S2102 combined with step S2103 may be implemented as an independent embodiment, but is not limited thereto.

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 executed by a network device, and the method includes:

Step S3101: Sending first information to a terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

In some embodiments, optional implementations of step S3101 may refer to step S2102 of FIG. 2a and other related parts of the embodiment involved in FIG. 2a , which will not be described in detail here.

In some embodiments, the sending the first information to the terminal includes:

Determine to trigger cell switching based on a network energy saving NES mode, and send the first information to the terminal;

Wherein, the NES method includes at least one of the following:

Activate discontinuous transmission DTX of the cell;

Activate cell discontinuous reception DRX;

The neighborhood is closed.

In some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES method.

In some embodiments, the sending the first information to the terminal includes:

Sending switching command information to the terminal;

The switching command information includes the first information.

In some embodiments, the handover command information is an RRC reconfiguration message.

In some embodiments, the original cell is a cell in the NES state.

In some embodiments, the cell in the NES state includes at least one of the following:

A cell in DTX mode;

The cell DTX mode is in the activated state;

A cell in DRX mode;

The cell DRX mode is in the activated state;

In a community where the community is closed.

In some embodiments, the sending the first information to the terminal includes:

Sending configuration information of NES CHO to the terminal;

The configuration information includes the first information.

In some embodiments, the method further comprises:

Sending fourth information to the terminal, where the fourth information is used to instruct the network device to enter the NES state.

In some embodiments, the configuration information is measurement reporting configuration information.

In some embodiments, the measurement reporting configuration information includes NES event information.

In some embodiments, the method further comprises at least one of the following:

Sending second information to a neighboring base station, wherein the second information indicates a NES mode of a neighboring cell;

Sending third information to the terminal, wherein the third information indicates the NES mode of the serving cell.

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 executed by a terminal, and the method includes:

Step S4101: Obtain first information.

In some embodiments, optional implementations of step S4101 may refer to other related parts of the embodiment involved in step S2101 in FIG. 2a , which will not be described in detail here.

Step S4102: Determine the target cell.

In some embodiments, optional implementations of step S4102 may refer to other related parts of the embodiment involved in step S2102 in FIG. 2a , which will not be described in detail here.

Step S4103: Perform RRC connection reestablishment based on the target cell.

In some embodiments, optional implementations of step S4103 may refer to other related parts of the embodiment involved in step S2103 in FIG. 2a , which will not be described in detail here.

The information indication method involved in the embodiments of the present disclosure may include at least one of steps S4101 to S4103. For example, step S4101 may be implemented as an independent embodiment, step S4102 may be implemented as an independent embodiment, and step S4103 may be implemented as an independent embodiment. For example, step S4101 combined with step S4102 may be implemented as an independent embodiment, and step S4102 combined with step S4103 may be implemented as an independent embodiment. But it is not limited to this.

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 executed by a terminal, and the method includes:

Step S4201: determining a target cell for RRC connection reestablishment based on the first information;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

In some embodiments, optional implementations of step S4201 may refer to other related parts of the embodiment involved in step S2102 in FIG. 2a , which will not be described in detail here.

In some embodiments, determining the target cell for RRC connection reestablishment based on the first information includes at least one of the following:

In the cell selection process after the cell handover fails, the original cell before the cell handover is not selected as the target cell for RRC connection reestablishment;

In the cell selection process after the cell handover fails, the cell in the NES state is not selected as the target cell.

In some embodiments, the method further comprises:

Receive the first information sent by the network device.

In some embodiments, the first information is information sent by the network device after determining that a cell switching is triggered based on a network energy saving NES mode; wherein the NES mode includes at least one of the following:

Activate discontinuous transmission DTX of the cell;

Activate cell discontinuous reception DRX;

The neighborhood is closed.

In some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES mode.

In some embodiments, the receiving first information sent by the network device includes:

Receiving switching command information sent by the network device;

The switching command information includes the first information.

In some embodiments, the handover command information is an RRC reconfiguration message.

In some embodiments, the original cell is a cell in the NES state.

In some embodiments, the cell in the NES state includes at least one of the following:

A cell in DTX mode;

The cell DTX mode is in the activated state;

A cell in DRX mode;

The cell DRX mode is in the activated state;

In a community where the community is closed.

In some embodiments, the receiving the first information sent by the network device includes:

Receiving configuration information of NES CHO sent by the network device;

The configuration information includes the first information.

In some embodiments, the method further comprises:

Fourth information sent by the network device is received, where the fourth information is used to instruct the network device to enter the NES state.

In some embodiments, the configuration information is measurement reporting configuration information.

In some embodiments, the measurement reporting configuration information includes NES event information.

In some embodiments, determining a target cell for reestablishing a radio resource control RRC connection based on the first information includes:

Determine that NES CHO execution fails and the value indicated by the first information field corresponding to the NES event information is a first value, and determine the target cell for radio resource control RRC connection reconstruction based on the first information.

In some embodiments, determining that the NES CHO fails and the value indicated by the first information field corresponding to the NES event information is a first value, and determining the target cell for radio resource control RRC connection reestablishment based on the first information, comprises:

Determine that the execution of NES CHO fails, the value indicated by the first information field corresponding to the NES event information is a first value, and the reason for CHO triggering is that the condition corresponding to the set NES event information is met, and determine the target cell for RRC connection reconstruction based on the first information.

In some embodiments, the method further comprises:

Receive the first information sent by the physical layer of the terminal.

In some embodiments, determining a target cell for reestablishing a radio resource control RRC connection based on the first information includes:

Determining that a radio link failure RLF or a handover failure HOF occurs, and receiving the first information, determining the target cell for RRC connection reestablishment based on the first information;

The first information indicates that the cell switching is NES-based switching.

In some embodiments, the method further comprises:

Receive third information sent by the network device, wherein the third information indicates the NES mode of the serving cell.

FIG5a is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG5a, the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes one of the following steps:

Step S5101: The network device sends first information to the terminal;

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

During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state;

Trigger NES-based cell switching;

Switches the CHO configuration parameters based on the conditions triggered by the NES.

The optional implementation of step S5101 can refer to the optional implementation of steps S2101 to S2103 of FIG. 2a and other related parts of the embodiment involved in FIG. 2a, which will not be described in detail here.

In some embodiments, the above method may include the methods of the above communication system side, network equipment, terminal, etc. embodiments, which will not be repeated here.

In order to better understand the embodiments of the present disclosure, some exemplary embodiments are further described below:

Example 1 provides a handover solution:

In some embodiments, if the network side triggers switching based on activating cell DTX/DRX or cell switching off, an indication (corresponding to the first information) is carried in the switching command, that is, the RRCReconfiguration message, and the indication is used to indicate that the switching is based on NES, that is, cell DTX/DRX or cell switching off.

In some embodiments, the indication may be configured in reconfigurationWithSync. If the indication is configured, if a handover failure occurs, that is, T304 times out, the terminal does not select the original cell as the target cell for RRC connection reestablishment in cell selection. Or a cell in NES state is not selected as the target cell for RRC connection reestablishment, wherein the cell in NES state refers to a cell DTX, a cell DRX activated cell and/or a cell switching off cell.

Example 1 provides a solution for Network Energy Saving Conditional Switching (NES CHO):

In some embodiments, if NES CHO fails to execute, that is, T304 times out, and the configuration of the NES CHO (for example, the associated measurement reporting configuration), that is, ReportConfigNR contains the nesEvent indication and is set to true, then after the NES CHO fails to execute, the terminal does not select the original cell to be switched as the target cell for RRC connection reestablishment in the cell selection. Or the cell in the NES state is not selected as the target cell for RRC connection reestablishment, and the cell in the NES state refers to the cell with cell DTX, cell DRX activated and/or cell switching off.

That is, conditional switching needs to consider NES event information and traditional trigger switching events (i.e. 1CHO=1nesEVent+1egacy event).

In some embodiments, if NES CHO fails to execute, that is, T304 times out, and in the configuration of the NES CHO, the associated measurement reporting configuration, that is, ReportConfigNR contains the nesEvent indication and is set to true, and this CHO is triggered because the condition of setting nesEvent is met. After NES CHO fails to execute, the terminal does not choose to switch to the original cell as the target cell for RRC connection reconstruction in the cell selection. Or the cell in the NES state is not selected as the target cell for RRC connection reconstruction, and the cell in the NES state refers to the cell with cell DTX, cell DRX activated and/or cell switching off.

In some embodiments, if RLF or HOF occurs and an NES mode indication (NES mode indication, which may be the first information) is received from the bottom layer (e.g., the physical layer), the terminal does not select the original cell to be switched as the target cell for RRC connection reestablishment in the cell selection. Or the cell in the NES state is not selected as the target cell for RRC connection reestablishment, and the cell in the NES state refers to a cell with cell DTX, cell DRX activated and/or a cell switching off.

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, and instructions are stored in the memory. 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 the form of software called by the processor, and the remaining part may be implemented in the form of hardware circuits.

In the embodiments of the present disclosure, 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 may also be a hardware circuit designed for artificial intelligence, which may be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep Deep learning processing unit (DPU), etc.

FIG6a is a schematic diagram of the structure of the network device 6100 proposed in the embodiment of the present disclosure. As shown in FIG6a, the network device 6100 may include: at least one of a transceiver module 6101, a processing module 6102, etc. In some embodiments, the transceiver module is used to send and receive information. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and/or receiving performed by the network device 6100 in any of the above methods, which will not be repeated here. Optionally, the processing module is used to perform at least one of the other steps performed by the network device in any of the above methods, which will not be repeated here.

FIG6b is a schematic diagram of the structure of the terminal proposed in the embodiment of the present disclosure. As shown in FIG6b, the terminal 6200 may include: at least one of a transceiver module 6201, a processing module 6202, etc. In some embodiments, the transceiver module is used to send and receive information. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and/or receiving performed by the terminal 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 together. 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.

FIG7a is a schematic diagram of the structure of a communication device 9100 proposed in an embodiment of the present disclosure. The communication device 9100 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 9100 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 9100 includes one or more processors 9101. The processor 9101 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 9100 is used to execute any of the above methods.

In some embodiments, the communication device 9100 further includes one or more memories 9102 for storing instructions. Optionally, all or part of the memory 9102 may also be outside the communication device 9100.

In some embodiments, the communication device 9100 further includes one or more transceivers 9103. When the communication device 9100 includes one or more transceivers 9103, the transceiver 9103 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2101, step S3101, but not limited thereto), and the processor 9101 performs at least one of the other steps.

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 9100 may include one or more interface circuits 9104. Optionally, the interface circuit 9104 is connected to the memory 9102, and the interface circuit 9104 may be used to receive signals from the memory 9102 or other devices, and may be used to send signals to the memory 9102 or other devices. For example, the interface circuit 9104 may read instructions stored in the memory 9102 and send the instructions to the processor 9101.

The communication device 9100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 9100 described in the present disclosure is not limited thereto, and the structure of the communication device 9100 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 the chip 9200 proposed in the embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 9200 shown in Fig. 7b, but it is not limited thereto.

The chip 9200 includes one or more processors 9201, and the chip 9200 is used to execute any of the above methods.

In some embodiments, the chip 9200 further includes one or more interface circuits 9202. Optionally, the interface circuit 9202 is connected to the memory 9203. The interface circuit 9202 can be used to receive signals from the memory 9203 or other devices, and the interface circuit 9202 can be used to send signals to the memory 9203 or other devices. For example, the interface circuit 9202 can read the memory 9203. The stored instruction is sent to the processor 9201.

In some embodiments, the interface circuit 9202 executes at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2101, step S3101, but not limited thereto), and the processor 9201 executes at least one of the other steps.

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

In some embodiments, the chip 9200 further includes one or more memories 9203 for storing instructions. Optionally, all or part of the memory 9203 may be outside the chip 9200.

The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 9100, the communication device 9100 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 9100, enables the communication device 9100 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 (35)

A communication method, characterized in that the method is performed by a network device, and the method comprises: Sending first information to a terminal; The first information is used to indicate at least one of the following: During the cell selection process after a cell switching failure, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell switching; a cell in a network energy saving NES state; triggering a cell switching based on NES; and switching the configuration parameters of CHO based on the conditions triggered by NES. The method according to claim 1, wherein sending the first information to the terminal comprises: Determine to trigger cell switching based on a network energy saving NES mode, and send the first information to the terminal; Wherein, the NES method includes at least one of the following: Activate discontinuous transmission DTX of the cell; Activate cell discontinuous reception DRX; The neighborhood is closed. The method according to claim 1, wherein sending the first information to the terminal comprises: Sending switching command information to the terminal; The switching command information includes the first information. The method according to claim 3 is characterized in that the switching command information is an RRC reconfiguration message. The method according to claim 1 is characterized in that the original cell is a cell in the NES state. The method according to claim 1, characterized in that the cell in the NES state includes at least one of the following: A cell in DTX mode; The cell DTX mode is in the activated state; A cell in DRX mode; The cell DRX mode is in the activated state; In a community where the community is closed. The method according to claim 1, wherein sending the first information to the terminal comprises: Sending configuration information of NES CHO to the terminal; The configuration information includes the first information. The method according to claim 7, characterized in that the configuration information is measurement reporting configuration information. The method according to claim 8, characterized in that the measurement reporting configuration information includes NES event information. The method according to any one of claims 1 to 9, characterized in that the method further comprises at least one of the following: Sending second information to a neighboring base station, wherein the second information indicates a NES mode of a neighboring cell; Sending third information to the terminal, wherein the third information indicates the NES mode of the serving cell. The method according to claim 7, characterized in that the method further comprises: Sending fourth information to the terminal, where the fourth information is used to instruct the network device to enter the NES state. A communication method, characterized in that the method is executed by a terminal, and the method comprises: Determine a target cell for RRC connection reestablishment based on the first information; The first information is used to indicate at least one of the following: During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state; Trigger NES-based cell switching; Switches the CHO configuration parameters based on the conditions triggered by the NES. The method according to claim 12, characterized in that the determining the target cell for RRC connection reestablishment based on the first information comprises at least one of the following: In the cell selection process after the cell handover fails, the original cell before the cell handover is not selected as the target cell for RRC connection reestablishment; In the cell selection process after the cell handover fails, the cell in the NES state is not selected as the target cell. The method according to claim 12, characterized in that the method further comprises: Receive the first information sent by the network device. The method according to claim 14, characterized in that the first information is information sent by the network device after determining that a cell switching is triggered based on a network energy saving NES mode; wherein the NES mode includes at least one of the following: Activate discontinuous transmission DTX of the cell; Activate cell discontinuous reception DRX; The neighborhood is closed. The method according to claim 14, wherein the receiving the first information sent by the network device comprises: Receiving switching command information sent by the network device; The switching command information includes the first information. The method according to claim 16 is characterized in that the switching command information is an RRC reconfiguration message. The method according to claim 12 is characterized in that the original cell is a cell in the NES state. The method according to claim 12, characterized in that the cell in the NES state includes at least one of the following: A cell in DTX mode; The cell DTX mode is in the activated state; A cell in DRX mode; The cell DRX mode is in the activated state; In a community where the community is closed. The method according to claim 12, wherein the receiving the first information sent by the network device comprises: Receiving configuration information of NES CHO sent by the network device; The configuration information includes the first information. The method according to claim 20, characterized in that the method further comprises: Fourth information sent by the network device is received, where the fourth information is used to instruct the network device to enter the NES state. The method according to claim 20 is characterized in that the configuration information is measurement reporting configuration information. The method according to claim 22, characterized in that the measurement reporting configuration information includes NES event information. The method according to claim 23, characterized in that the determining the target cell for radio resource control RRC connection reestablishment based on the first information comprises: Determine that NES CHO execution fails and the value indicated by the first information field corresponding to the NES event information is a first value, and determine the target cell for radio resource control RRC connection reconstruction based on the first information. The method according to claim 24, characterized in that the step of determining that the NES CHO fails and the value indicated by the first information field corresponding to the NES event information is a first value, and determining the target cell for radio resource control RRC connection reestablishment based on the first information, comprises: Determine that the execution of NES CHO fails, the value indicated by the first information field corresponding to the NES event information is a first value, and the reason for CHO triggering is that the condition corresponding to the set NES event information is met, and determine the target cell for RRC connection reconstruction based on the first information. The method according to claim 12, characterized in that the method further comprises: Receive the first information sent by the physical layer of the terminal. The method according to claim 26, characterized in that the determining the target cell for radio resource control RRC connection reestablishment based on the first information comprises: Determining that a radio link failure RLF or a handover failure HOF occurs, and receiving the first information, determining the target cell for RRC connection reestablishment based on the first information; The first information indicates that the cell switching is NES-based switching. The method according to claim 12, characterized in that the method further comprises: Receive third information sent by the network device, wherein the third information indicates the NES mode of the serving cell. A communication method, characterized in that the method comprises: The network device sends first information to the terminal; The first information is used to indicate at least one of the following: During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state; Trigger NES-based cell switching; Switches the CHO configuration parameters based on the conditions triggered by the NES. A network device, characterized in that the network device comprises: The transceiver module is configured as follows: Sending first information to a terminal; The first information is used to indicate at least one of the following: During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state; Trigger NES-based cell switching; Switches the CHO configuration parameters based on the conditions triggered by the NES. A terminal, characterized in that the terminal comprises: The processing module is configured as follows: Determine a target cell for RRC connection reestablishment based on the first information; The first information is used to indicate at least one of the following: During the cell selection process after the cell handover fails, the terminal is prohibited from selecting the first cell as the target cell for reestablishing the radio resource control RRC connection; the first cell includes at least one of the following: the original cell before the cell handover; a cell in a network energy saving NES state; Trigger NES-based cell switching; Switches the CHO configuration parameters based on the conditions triggered by the NES. A communication system, characterized in that the communication system includes a network device and a terminal; the network device is configured to implement the method described in any one of claims 1 to 11, and the terminal is configured to implement the method described in any one of claims 12 to 28. A network device, characterized in that the network device comprises: one or more processors; The network device is used to execute the method according to any one of claims 1 to 11. A terminal, characterized in that the terminal comprises: one or more processors; The terminal is used to execute the method according to any one of claims 12 to 28. A storage medium, characterized in that the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method described in any one of claims 1 to 11 and claims 12 to 28.