WO2024250305A1 - Connection establishment method and apparatus, and storage medium - Google Patents

Abstract

The present disclosure relates to a connection establishment method and apparatus, and a storage medium. The method comprises: receiving first information sent by a remote terminal, the first information indicating a first service that has been added by the remote terminal; receiving a paging message sent by a network device, the paging message comprising information of a second service paged by the network device; and sending second information to the remote terminal, the second information comprising information of a third service, the third service being a service that is in the second service and that matches the first service, and the second information being used to trigger the remote terminal to establish or recover a radio resource control (RRC) connection. In this way, a relay terminal can, according to a first service that has been added by a remote terminal, forward to the remote terminal second information that is sent by a network device and that matches the first service, so that the remote terminal can establish or recover a RRC connection according to the second information.

Description

Connection establishment method, device and storage medium Technical Field

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

Background Art

In a wireless communication system, a user equipment (UE) in a connected state can receive multicast services sent by a network device. After the multicast service stops, the UE can enter an inactive state or an idle state. After the multicast service is resumed or started, the network device can send a notification to the UE in the inactive state or the idle state so that the UE can enter a connected state from the inactive state or the idle state.

Summary of the invention

Embodiments of the present disclosure provide a connection establishment method, device, and storage medium.

According to a first aspect of an embodiment of the present disclosure, a connection establishment method is provided, which is performed by a relay terminal, and the method includes:

Receiving first information sent by a remote terminal, where the first information indicates a first service that the remote terminal has joined;

Receiving a paging message sent by a network device, wherein the paging message includes information of a second service paging by the network device;

Sending second information to the remote terminal, the second information including information of a third service, the third service being a service in the second service that matches the first service, and the second information being used to trigger the remote terminal to establish or restore a radio resource control RRC connection.

According to a second aspect of an embodiment of the present disclosure, a connection establishment method is provided, which is performed by a remote terminal, and the method includes:

Sending first information to the relay terminal, where the first information indicates a first service that the remote terminal has joined;

receiving second information sent by the relay terminal, where the second information includes information of a third service, where the third service is a service among the second services that matches the first service, and where the second service is a network device paging service;

A radio resource control RRC connection is established or restored according to the second information.

According to a third aspect of an embodiment of the present disclosure, a connection establishment method is provided, which is performed by a network device, and the method includes:

A paging message is sent to a relay terminal, wherein the paging message includes information about a second service that is paged by the network device, and the paging message is used by the relay terminal to send second information to a remote terminal, wherein the second information includes information about a third service, wherein the third service is a service in the second service that matches the first service, wherein the first service is a service that the remote terminal has joined, and wherein the second information is used to trigger the remote terminal to establish or resume a radio resource control (RRC) connection.

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

A first receiving module is configured to receive first information sent by a remote terminal, wherein the first information indicates a first service that the remote terminal has joined;

The first receiving module is further configured to receive a paging message sent by a network device, wherein the paging message includes information of a second service paging by the network device;

The first sending module is configured to send second information to the remote terminal, where the second information includes information about a third service, where the third service is a service in the second service that matches the first service, and the second information is used to trigger the remote terminal to establish or restore a wireless resource control RRC connection.

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

A second sending module is configured to send first information to the relay terminal, where the first information indicates a first service that the remote terminal has joined;

The second receiving module is configured to receive second information sent by the relay terminal, wherein the second information includes a third business The third service is information of a second service, the third service is a service among the second services that matches the first service, and the second service is a network device paging service;

The processing module is configured to establish or restore a radio resource control RRC connection according to the second information.

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

The third sending module is configured to send a paging message to the relay terminal, the paging message including information of the second service of the network device paging, the paging message is used by the relay terminal to send the second information to the remote terminal, the second information includes information of the third service, the third service is a service in the second service that matches the first service, the first service is a service that the remote terminal has joined, and the second information is used to trigger the remote terminal to establish or restore a radio resource control RRC connection.

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

processor;

a memory for storing processor-executable instructions;

The processor is configured to execute the steps of the connection establishment method provided in the first aspect, the second aspect or the third aspect of the present disclosure.

According to an eighth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the steps of the connection establishment method provided by the first aspect, the second aspect or the third aspect of the present disclosure are implemented.

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

A relay terminal, which can execute the connection establishment method provided in the first aspect of the present disclosure;

A remote terminal, which can execute the connection establishment method provided in the second aspect of the present disclosure;

A network device, wherein the network device can execute the connection establishment method provided in the third aspect of the present disclosure.

The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: the relay terminal receives the first information sent by the remote terminal, the first information indicating the first service that the remote terminal has joined; receives the paging message sent by the network device, the paging message includes the information of the second service that the network device is paging; sends the second information to the remote terminal, the second information includes the information of the third service, the third service is the service in the second service that matches the first service, and the second information is used to trigger the remote terminal to establish or restore the radio resource control RRC connection. In this way, the relay terminal can forward the second information sent by the network device that matches the first service to the remote terminal according to the first service that the remote terminal has joined, so that the remote terminal can establish or restore the RRC connection according to the second information.

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

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

Fig. 1 is a schematic diagram showing a communication system according to an exemplary embodiment.

Fig. 2 is a schematic diagram showing a service data transmission method according to an exemplary embodiment.

Fig. 3 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 4 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 5 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 6 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 7 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 8 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 9 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 10 is a flowchart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 11 is a flow chart showing a method for establishing a connection according to an exemplary embodiment.

Fig. 12 is a block diagram of a relay terminal according to an exemplary embodiment.

Fig. 13 is a block diagram of a remote terminal according to an exemplary embodiment.

Fig. 14 is a block diagram showing a network device according to an exemplary embodiment.

Fig. 15 is a block diagram of a communication device according to an exemplary embodiment.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

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 description with reference to the accompanying drawings, the same mark in different drawings may represent the same element unless otherwise stated. Although the operations or steps are described in a specific order in the embodiments or drawings of the present disclosure, it should not be understood as requiring that these operations or steps be performed in the specific order shown or in a serial order, or requiring that all the operations or steps shown be performed to obtain the desired result. In the embodiments of the present disclosure, these operations or steps may be performed in any order if there is no contradiction; these operations or steps may also be performed in parallel; some of these operations or steps may also be performed; and the operations or steps in multiple embodiments or drawings may be arbitrarily combined, and the embodiments of the present disclosure are not limited to this.

In the description of the embodiments of the present disclosure, unless otherwise specified, "multiple" refers to two or more than two, and other quantifiers are similar. "At least one item", "one item or multiple items" or similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one item can represent any number; for another example, one item or multiple items of a, b and c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple. "And/or" is a kind of association relationship that describes the associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character "/" indicates that the objects associated before and after are in an "or" relationship.

In the description of the embodiments of the present disclosure, unless otherwise specified or the context clearly indicates other meanings, the singular forms "a", "an", "an", "the", "said", "above", "aforesaid", "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 description of the embodiments of the present disclosure, "in one case A, in another case B", "in response to one case A, in response to another case B", etc., the following technical solutions may be included according to the situation: A is executed independently of B, that is, in some embodiments A; B is executed independently of A, that is, in some embodiments B; A and B are selectively executed, that is, selected from A and B for execution in some embodiments; A and B are both executed, that is, A and B in some embodiments. When there are more branches such as A, B, C, etc., the above is also similar.

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

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

In the description of the embodiments of the present disclosure, “including A”, “comprising A”, “used to indicate A”, and “carrying A” may be interpreted as directly carrying A or as indirectly indicating A.

In the description of the embodiments of the present disclosure, terms such as "in response to...", "in response to determining...", "in the case of...", "at...", "when...", "if...", "if...", etc. can be used interchangeably without contradiction or feature description.

In the description of the embodiments of the present invention, devices and the like can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “device”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

In the description of the embodiments of the present disclosure, the names of messages or information exchanged between multiple devices are used for illustrative purposes only, and are not used to limit the scope of these messages or information.

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.

The implementation environment of the embodiments of the present disclosure is first introduced below.

The technical solution of the disclosed embodiment can be applied to various communication systems. The communication system may include one or more of the 4th Generation (4G) communication system, the 5th Generation (5G) communication system, and other future wireless communication systems (such as 6G). The communication system may also include one or more of a land public mobile communication network (PLMN), a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT) communication system, a vehicle-to-everything (V2X) communication system, or other communication systems.

FIG1 is a schematic diagram of a communication system 100 according to an exemplary embodiment. As shown in FIG1 , the communication system 100 may include a terminal device 150 and a network device 160. The communication system may be used to support 4G network access technology, such as Long Term Evolution (LTE) access technology, or 5G network access technology, such as New Radio Access Technology (New RAT), or other future wireless communication technologies. It should be noted that in the communication system, the number of network devices and terminal devices may be one or more, and the number of network devices and terminal devices of the communication system shown in FIG1 is only an adaptive example, and the present disclosure does not limit this.

The network device in FIG1 can be used to provide wireless communication functions for the terminal device. For example, the network device may include an evolutionary Node B (eNB or eNodeB) in LTE; the network device may also include the next generation Node B (gNB or gNodeB) in a 5G network; the network device may also include a wireless access network (NG-Radio Access Network, NG-RAN) device in a 5G network; the network device may also include a base station, a broadband network in a future evolved public land mobile network (PLMN) or a base station in a future evolved public land mobile network (PLMN). At least one of the following devices: a Broadband Network Gateway (BNG), an aggregation switch, or a non-3rd Generation Partnership Project (3GPP) access device. Optionally, the network device in the embodiment of the present disclosure may include at least one of the following various forms of base stations, such as: a macro base station, a micro base station (also called a small station), a relay station, an access point, a 5G base station or a future base station, a satellite, a transmission point (Transmitting and Receiving Point, TRP), a transmission point (Transmitting Point, TP), a mobile switching center, and a device-to-device (D2D), a machine-to-machine (M2M), an Internet of Things (IoT), a vehicle-to-everything (V2X), or other devices that assume the function of a base station in a communication system, etc., and the embodiment of the present disclosure does not specifically limit this. For the convenience of description, in the embodiment of the present disclosure, the device that provides wireless communication functions for the terminal device can be referred to as a network device.

In some embodiments, the network device may include a core network device and an access network device, and the access network device may also be referred to as a base station. The terminal device may communicate with the core network device through the access network device.

In some embodiments, "Access Network Device (AN Device)", "Radio Access Network Device (RAN Device)", "Base Station (BS)", "Radio Base Station (Radio Base Station)", "Fixed Station (Fixed Station)", "Node (NODE)", "Access Point (Access Point)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (Transmission/Reception Point)" The terms such as 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" and "Bandwidth Part (BWP)" are used interchangeably.

The terminal device in FIG1 may be an electronic device that provides voice or data connectivity, for example, the terminal device may also be referred to as a user equipment (UE), a subscriber unit (Subscriber Unit), a mobile station (Mobile Station), a station (Station), a terminal (Terminal), etc. For example, the terminal device may include a smart phone, a smart wearable device, a smart speaker, a smart tablet, a wireless modem (modem), a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a customer premises equipment (Customer Premise Equipment, CPE), etc. With the development of wireless communication technology, devices that can access a communication system, communicate with network devices of a communication system, communicate with other objects through a communication system, or devices that can directly communicate with each other between two or more devices can all be terminal devices in the embodiments of the present disclosure; for example, terminals and cars in intelligent transportation, household appliances in smart homes, power meter reading instruments, voltage monitoring instruments, environmental monitoring instruments in smart grids, video monitoring instruments in intelligent security networks, cash registers, etc. In the embodiments of the present disclosure, terminal devices can communicate with network devices. Multiple terminal devices can also communicate with each other. Terminal devices can be statically fixed or mobile, and the embodiments of the present disclosure do not limit this.

In some embodiments, “Terminal”, “Terminal Device”, “User Equipment (Ue)”, “User Terminal (User Terminal)”, “Mobile Station (MS)”, “Mobile Terminal (MT)”, “Subscriber Station (Subscriber Station)”, “Mobile Unit (Mobile Unit)”, “Subscriber Unit (Subscriber Unit)”, “Wireless Unit (Wireless Unit)”, “Remote Unit (Remote Unit)”, “Mobile Device (Mobile Device)”, “Wireless Device (Wir The terms such as "wireless Device", "Wireless Communication Device", "Remote Device", "Mobile Subscriber Station", "Access Terminal", "Mobile Terminal", "Wireless Terminal", "Remote Terminal", "Handset", "User Agent", "Mobile Client" and "Client" are used interchangeably.

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

In some embodiments of the present disclosure, as shown in FIG1 , the terminal device 150 may include a remote terminal 151 and a relay terminal 153. The relay terminal 153 may be used to provide a relay function for the remote terminal 151 to communicate with the network device 160. In this scenario, the remote terminal 151 may be referred to as a remote UE (remote UE), and the relay terminal 153 providing the relay function may also be referred to as a relay UE (relay UE).

In some embodiments, the relay terminal 153 and the network device 160 can communicate through a first wireless link, which is a non-direct link. The first wireless link may include an uplink and/or a downlink between the relay terminal and the network device. For example, the first wireless link may include one or more wireless channels, for example, one or more of PRACH (Physical Random Access Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), PDSCH (Physical Downlink Shared Channel), PDCCH (Physical Downlink Control Channel), etc. The interface for communication between the relay terminal 153 and the network device 160 may be called a first wireless interface, which is a non-direct link interface. For example, the first wireless interface may be a UU interface.

In some embodiments, the remote terminal 151 and the relay terminal 153 may communicate via a direct link Sidelink. For example, the direct link may include one or more direct link channels, such as one or more of a physical sidelink broadcast channel (PSBCH), a physical sidelink control channel (PSCCH), and a physical sidelink shared channel (PSSCH). The interface for communication between the remote terminal 151 and the relay terminal 153 may be referred to as a PC5 interface or a direct communication interface. The manner of direct link communication between the remote terminal 151 and the relay terminal 153 may include any one or more of unicast, multicast, or broadcast.

In some embodiments, the remote terminal 151 and the network device 160 can communicate directly through the first wireless link; in other embodiments, the communication between the remote terminal 151 and the network device 160 can also be achieved through a relay terminal; in other embodiments, the remote terminal 151 and the network device 160 can communicate directly through the first wireless link or through a relay terminal.

It should be noted that, in FIG. 1 , the terminal device 150 may also include a first terminal, a second terminal or more terminals; the remote terminal may be one or more, and the relay terminal may also be one or more, which is not limited in this embodiment of the present disclosure.

FIG2 is a schematic diagram of a service data transmission method according to an exemplary embodiment. As shown in FIG2 , a network device can send multicast or broadcast service data through a Packet Data Convergence Protocol (PDCP) entity and a Radio Link Control (RLC) entity; a relay terminal receives the service data through an RLC entity and sends the service data through an SL-RLC entity; a remote terminal can receive the service data through a Sidelink-Radio Link Control (SL-RLC) entity and a PDCP entity. In this way, without the need for a PDCP entity, the relay terminal can forward the service data through an RLC entity and an SL-RLC entity.

In some embodiments, the network device may also include a media access control MAC (Medium Access Control) entity and a physical layer PHY (Physical) entity, the remote terminal may also include a direct link media access control SL-MAC entity and a direct link physical layer SL-PHY entity, and similarly, the relay terminal may also include a MAC entity, a PHY entity, a SL-MAC entity and a SL-PHY entity.

It should be noted that for relevant descriptions of PDCP, RLC, MAC and PHY, please refer to the description in the 3GPP protocol, which will not be repeated here.

In some embodiments of the present disclosure, the remote terminal 151 can receive a multicast service or a broadcast service sent by the network device 160 in a connected state. After the multicast service or the broadcast service stops, the remote terminal 151 can be released to an inactive state or an idle state. After the multicast service or the broadcast service is resumed or started, the network device 160 can send a signal to the remote terminal 151 in an inactive state or an idle state. The terminal device sends a notification. For example, the notification may be a paging group list (paging Group List) carried in a paging message. The paging group list may carry one or more temporary mobile group identities (Temporary Mobile Group Identity, TMGI), and the TMGI is used to identify a multicast service or a broadcast service.

If the remote terminal 151 in an inactive or idle state receives a paging message sent by the network device 160 and determines that the TMGI carried in the paging message identifies a multicast service or broadcast service to which the remote terminal 151 has joined, the remote terminal 151 may enter a connected state.

In some embodiments of the present disclosure, the remote terminal 151 may not be directly connected to the network device 160, but may communicate with the network device 160 through the relay terminal 153, thereby expanding the coverage of the network device.

For example, the remote terminal 151 in an inactive or idle state can send paging information (SL-PagingInfo-RemoteUE) to the relay terminal 153 device, wherein the paging information can be carried in the remote user equipment information side link (RemoteUEInformationSidelink), and the paging information can include the paging identifier (SL-PagingIdentityRemoteUE) and the paging cycle of the remote terminal 151. The paging identifier of the remote terminal 151 can be an initial radio network temporary identifier (Initial Radio Network Temporary Identifier, I-RNTI) or a next generation 5G network-simplified temporary mobile user identifier (Next Generation 5G-Simplified Temporary Mobile Subscriber Identity, NG-5G-S-TMSI). The relay terminal 153 can monitor the paging message sent by the network device 160. The paging message can carry a paging record list (Paging Record List). The paging record list can carry one or more paging records (Paging Record). Each paging record can carry a paging UE identifier (PagingUE-Identity), which can be an I-RNTI or NG-5G-S-TMSI.

If the paging UE identifier carried in the paging message sent by the network device 160 received by the relay terminal 153 is consistent with the paging identifier of the remote terminal 151, the paging record is sent to the remote terminal 151, wherein the paging record can be carried by the Uu message transfer sidelink (UuMessageTransferSidelink). After receiving the paging record sent by the relay terminal 153, the remote terminal 151 enters the connected state.

It should be noted that for the relevant description of the idle state, inactive state and connected state, please refer to the description in the 3GPP protocol, which will not be repeated here.

In some embodiments of the present disclosure, after the multicast or groupcast service is restored or started, the network device 160 may send a paging message carrying TMGI to the relay terminal 153. Since the paging message does not carry the paging UE identifier, the relay terminal 153 fails to match the paging message with the remote terminal 151, and thus cannot forward the paging message sent by the network device 160 to the remote terminal 151, resulting in the remote terminal 151 in an inactive or idle state being unable to enter a connected state.

FIG3 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be performed by the above communication system. As shown in FIG3 , the method may include:

S301. The remote terminal sends first information to the relay terminal.

The first information indicates a first service that the remote terminal has joined.

In some embodiments, the first service may include a multicast service or a broadcast service.

In some embodiments, the first service may be a service that the remote terminal is interested in or expects to receive.

Optionally, the first service may be IPTV (Internet Protocol Television), video conferencing, live webcasting, radio and television, etc.

In other embodiments, the first service may be a service that needs to deliver information to a user.

Optionally, the first service may be an emergency notification, a weather warning, or the like.

In other embodiments, the first service may be other services that need to be sent to a remote terminal via a relay terminal, which is not limited in the embodiments of the present disclosure.

In some embodiments, the first information may include at least one temporary mobile group identity TMGI.

In some embodiments, the first information may also be referred to as first paging group information.

In some embodiments, the first paging group information may be carried by paging group information.

For example, the remote terminal may send paging group information to the relay terminal, where the paging group information carries first paging group information, and the first paging group information includes the TMGI of the first service to which the remote terminal has joined.

Optionally, the first paging group information may be the TMGI of a multicast service or a broadcast service to which the remote terminal has joined.

In some embodiments, the first paging group information may be carried by RemoteUEInformationSidelink.

In some embodiments, the remote terminal is in an idle state or an inactive state and can send the first information to the relay terminal.

For example, after the remote terminal switches from the connected state to the idle state or the inactive state, the remote terminal may send the first information to the relay terminal; when the remote terminal switches to a new relay terminal, the remote terminal may also send the first information to the relay terminal.

In some embodiments, the remote terminal may send the first information to the relay terminal via a direct link.

S302: The network device sends a paging message to the relay terminal.

The paging message may include information about the second service of the network device paging.

In some embodiments, the second service may include a multicast service or a broadcast service.

In some embodiments, the information of the second service may also be referred to as second paging group information.

By way of example, the paging message may include second paging group information.

In some embodiments, the paging message may include at least one TMGI.

In some embodiments, the paging message may also include a paging terminal identifier.

It should be noted that the paging terminal identifier may also be referred to as a paging UE identifier, which is not limited in the embodiments of the present disclosure.

In this step, the network device may send the paging message to the relay terminal via a wireless link (a non-direct link, such as a UU interface).

In some embodiments, when the network device determines that the multicast service or the broadcast service is resumed or started, the network device may send the paging message to the relay terminal.

It should be noted that the embodiment of the present disclosure does not limit the execution order of the above-mentioned step S301 and step S302. Step S301 can be executed first, and then step S302, or step S302 can be executed first, and then step S301, or step S301 and step S302 can be executed simultaneously.

For example, the relay terminal determines that the first information sent by the remote terminal is received, and monitors the paging message sent by the network device.

S303: The relay terminal determines that there is a third service matching the first service in the second service, and sends second information to the remote terminal.

In some embodiments, the third service may include a multicast service or a broadcast service.

In some embodiments, the second information may include at least one TMGI.

In the step, the relay terminal may monitor the paging message sent by the network device, and after receiving the paging message sent by the network device, may determine a service matching the first service from the second service to obtain the third service.

For example, taking the paging message including the second paging group information and the first information being the first paging group information as an example, the relay terminal determines that there is at least one second paging group information matching the first paging group information in the paging message, and sends the matching second paging group information to the remote terminal.

In some embodiments, the second paging group information may be carried by UuMessageTransferSidelink.

In some embodiments, the relay terminal may store the first information received from the remote terminal, and after monitoring the paging message sent by the network device, determine that there is a third service matching the first service in the second service, and send the second information to the remote terminal.

In some embodiments, the relay terminal may send a paging terminal identifier to the remote terminal.

Optionally, the relay terminal determines that there is a third service matching the first service in the second service, and may send the second information and the paging terminal identifier to the remote terminal.

S304: The remote terminal establishes or restores an RRC connection according to the second information.

In this step, the remote terminal receives the second information sent by the relay terminal and can send the second information to the non-access layer. After the non-access layer receives the second information sent by the remote terminal, it can trigger the RRC connection establishment process so that the remote terminal establishes or restores the RRC connection.

It should be noted that the non-access layer may also be called a high layer.

In some embodiments, when the remote terminal is in an idle state, the second information is sent to the non-access layer. After receiving the second information sent by the remote terminal, the non-access layer triggers the RRC connection establishment process, and the remote terminal can establish an RRC connection through the relay terminal.

In this way, the remote terminal can establish an RRC connection according to the second information and the current state of the remote terminal.

In other embodiments, when the remote terminal is in an inactive state, the second information is sent to the non-access layer. After receiving the second information sent by the remote terminal, the non-access layer triggers the RRC connection recovery process, and the remote terminal recovers the RRC connection through the relay terminal.

In this way, the remote terminal can restore the RRC connection according to the second information and the current state of the remote terminal.

In other embodiments, after the remote terminal receives the paging terminal identifier and the second information sent by the relay terminal, it does not make a status judgment, but directly sends the second information to the non-access layer. After receiving the second information sent by the remote terminal, the non-access layer triggers the RRC connection establishment process, and the remote terminal can establish an RRC connection through the relay terminal.

In some embodiments, the paging terminal identifier sent by the relay terminal may be NG-5G-S-TMSI.

In this way, the remote terminal can directly establish an RRC connection according to the second information.

In some embodiments, the remote terminal determines that the third service in the second information is a service matching the first service, and the remote terminal is in an idle state or an inactive state, and sends the second information to the non-access layer.

Optionally, the remote terminal determines that the third service in the second information is a service that matches the first service, and the remote terminal is in an idle state, and sends the second information to the non-access layer. After receiving the second information sent by the remote terminal, the non-access layer triggers the RRC connection establishment process, and the remote terminal can establish an RRC connection through the relay terminal.

Optionally, the remote terminal determines that the third service in the second information is a service that matches the first service, and the remote terminal is in an inactivated state, and sends the second information to the non-access layer. After receiving the second information sent by the remote terminal, the non-access layer triggers the RRC connection recovery process, and the remote terminal recovers the RRC connection through the relay terminal.

In some embodiments, the remote terminal can receive a paging terminal identifier sent by the relay terminal, the remote terminal determines that the third service in the second information is a service that matches the first service, and the remote terminal is in an idle state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and establishes an RRC connection based on the second information.

Optionally, the remote terminal can receive a paging terminal identifier sent by the relay terminal, the remote terminal determines that the third service in the second information is a service that matches the first service, and the remote terminal is in an idle state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and sends the second information to the non-access layer. After receiving the second information sent by the remote terminal, the non-access layer triggers the RRC connection establishment process, and the remote terminal can establish an RRC connection through the relay terminal.

In this way, the remote terminal can establish an RRC connection according to the second information, the current state of the remote terminal and the paging terminal identifier.

Optionally, the remote terminal can also receive a paging terminal identifier sent by the relay terminal. The remote terminal determines that the third service in the second information is a service that matches the first service, and the remote terminal is in an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and sends the second information to the non-access layer. After receiving the second information sent by the remote terminal, the non-access layer triggers the RRC connection recovery process, and the remote terminal recovers the RRC connection through the relay terminal.

In this way, the remote terminal can restore the RRC connection according to the second information, the current state of the remote terminal and the paging terminal identifier.

In some embodiments, the remote terminal identifier can be the next generation 5G network-simplified temporary mobile subscriber identifier NG-5G-S-TMSI.

In some embodiments, the NG-5G-S-TMSI may be an identifier pre-assigned by the non-access layer to the remote terminal.

By adopting the above method, the relay terminal can forward the second information matching the first service sent by the network device to the remote terminal according to the first service to which the remote terminal has joined, so that the remote terminal can establish or restore the RRC connection according to the second information.

FIG4 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a relay terminal in the above communication system. As shown in FIG4 , the method may include:

S401: A relay terminal receives first information sent by a remote terminal.

The first information may indicate a first service to which the remote terminal has joined.

In some embodiments, the first information may include at least one temporary mobile group identity TMGI.

In some embodiments, the first service may include a multicast service or a broadcast service.

In some embodiments, the first service may be a service that the remote terminal is interested in or expects to receive.

It should be noted that the specific implementation of the first information and the first service can refer to the implementation shown in FIG. 3 of the present disclosure. The specific description in the example will not be repeated here.

S402: The relay terminal receives a paging message sent by the network device.

The paging message may include information about the second service of the network device paging.

In some embodiments, the second service may include a multicast service or a broadcast service.

In some embodiments, the information of the second service may also be referred to as second paging group information.

In some embodiments, the paging message may include at least one TMGI.

In some embodiments, the paging message may also include a paging terminal identifier.

It should be noted that, for the specific implementation of the paging message and the second service, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

It should be noted that the embodiment of the present disclosure does not limit the execution order of the above-mentioned step S401 and step S402. Step S401 can be executed first, and then step S402, or step S402 can be executed first, and then step S401, or step S401 and step S402 can be executed simultaneously.

S403: The relay terminal sends second information to the remote terminal.

The second information may include information of a third service, where the third service is a service in the second service that matches the first service.

In some embodiments, the second information is used to trigger the remote terminal to establish or resume an RRC connection.

In some embodiments, the second information may include at least one TMGI.

In some embodiments, the second information may be further used to trigger the remote terminal to determine that the third service in the second information is a service matching the first service, and the remote terminal is in an idle state or an inactive state.

It should be noted that, for the specific implementation of the second information and the third service, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

It should also be noted that, unless there is any contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure and their various optional schemes. The specific implementation methods of the above steps in this embodiment can also refer to the description in the embodiment shown in Figure 3 of the present disclosure, and will not be repeated here.

In this way, the relay terminal can forward the second information matching the first service sent by the network device to the remote terminal according to the first service to which the remote terminal has joined, so that the remote terminal can establish or restore the RRC connection according to the second information.

FIG5 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a relay terminal in the above communication system. As shown in FIG5 , the method may include:

S501: The relay terminal determines that a third service matching the first service exists in the second service.

For example, taking the paging message including at least one TMGI as an example, if the relay terminal determines that at least one TMGI included in the paging message is the same as at least one TMGI included in the first information, the information of the service corresponding to the same TMGI is used as the second information.

It should be noted that, for the specific implementation of the first service, the second service and the third service, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

S502: The relay terminal sends second information to the remote terminal.

It should also be noted that, unless there is any contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure and their various optional schemes. The specific implementation methods of the above steps in this embodiment can also refer to the description in the embodiment shown in Figure 3 of the present disclosure, and will not be repeated here.

In this way, the relay terminal can send the second information of the third service matching the first service in the paging information sent by the network device to the remote terminal, so that the remote terminal can establish or restore the RRC connection according to the second information.

FIG6 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a relay terminal in the above communication system. As shown in FIG6 , the method may include:

S601: The relay terminal sends a paging terminal identifier to a remote terminal.

Among them, the paging terminal identifier can be used by the remote terminal to determine that the third service is a service matching the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and establish or restore the RRC connection according to the second information.

In some embodiments, the remote terminal identifier may be a Next Generation 5G Network-Simplified Temporary Mobile Subscriber Identity NG-5G-S-TMSI.

It should be noted that, for the specific implementation of the paging terminal identifier, the first service, the remote terminal identifier and the second information, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

It should also be noted that, unless there is any contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure and their various optional schemes. The specific implementation methods of the above steps in this embodiment can also refer to the description in the embodiment shown in Figure 3 of the present disclosure, and will not be repeated here.

In this way, the relay terminal can send the paging terminal identifier sent by the network device to the remote terminal, so that the remote terminal can be in an idle state or an inactive state, and when it is determined that the third service included in the second information sent by the relay terminal is a service that matches the first service, and when it is determined that the paging terminal identifier sent by the relay terminal matches the remote terminal identifier of the remote terminal, an RRC connection is established or restored according to the second information.

FIG7 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a remote terminal in the above communication system. As shown in FIG7 , the method may include:

S701. The remote terminal sends first information to the relay terminal.

The first information may indicate a first service to which the remote terminal has joined.

In some embodiments, the first information may include at least one temporary mobile group identity TMGI.

In some embodiments, the first service may include a multicast service or a broadcast service.

In some embodiments, the first service may be a service that the remote terminal is interested in or expects to receive.

It should be noted that, for the specific implementation of the first information and the first service, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

In some embodiments, the remote terminal may send the first information to the relay terminal via a direct link, and the direct link may be a link between the remote terminal and the relay terminal.

S702: The remote terminal receives second information sent by the relay terminal.

The second information may include information of a third service, where the third service is a service in the second service that matches the first service.

In some embodiments, the second information may include at least one TMGI.

It should be noted that, for the specific implementation method of the second information, reference can be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

In some embodiments, the remote terminal may receive the second information sent by the relay terminal through a direct link, and the direct link may be a link between the remote terminal and the relay terminal.

S703: The remote terminal establishes or restores an RRC connection according to the second information.

In one implementation, the remote terminal sends the second information to the non-access layer, and the second information is used by the non-access layer to trigger an RRC connection establishment or recovery process.

It should also be noted that, unless there is any contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure and their various optional schemes. The specific implementation methods of the above steps in this embodiment can also refer to the description in the embodiment shown in Figure 3 of the present disclosure, and will not be repeated here.

By adopting the above method, the remote terminal can send first information to the relay terminal and receive second information sent by the relay terminal that matches the first service indicated by the first information. In this way, the remote terminal can establish or restore the RRC connection according to the second information.

FIG8 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a remote terminal in the above communication system. As shown in FIG8 , the method may include:

S801. The remote terminal is in an idle state or an inactive state and sends first information to a relay terminal.

The first information may indicate a first service to which the remote terminal has joined.

It should be noted that, for the specific implementation of the first information and the first service, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

It should also be noted that, in the absence of contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure. The specific implementation methods of the above steps in this embodiment can also be combined with various optional schemes, and can be referred to the description in the embodiment shown in FIG3 of the present disclosure, which will not be repeated here.

In this way, the remote terminal can send first information to the relay terminal in idle or inactive state, so that the relay terminal can forward second information matching the first service indicated by the first information to the remote terminal, thereby establishing or restoring the RRC connection according to the second information.

FIG9 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a remote terminal in the above communication system. As shown in FIG9 , the method may include:

S901: The remote terminal determines that a third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state.

The first service may be a service to which the remote terminal has subscribed.

It should be noted that, for the specific implementation of the second information and the first service, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

S902: The remote terminal establishes or restores an RRC connection according to the second information.

It should also be noted that, unless there is any contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure and their various optional schemes. The specific implementation methods of the above steps in this embodiment can also refer to the description in the embodiment shown in Figure 3 of the present disclosure, and will not be repeated here.

In this way, when the remote terminal is in an idle state or an inactive state and determines that the second information sent by the relay terminal is information matching the first service, the remote terminal can establish a connection with the network device according to the second information.

FIG10 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a remote terminal in the above communication system. As shown in FIG10 , the method may include:

S1001. A remote terminal receives a paging terminal identifier sent by a relay terminal.

It should be noted that, for the specific implementation of the paging terminal identification, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

S1002: The remote terminal determines that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal.

In some embodiments, the remote terminal identifier may be a Next Generation 5G Network-Simplified Temporary Mobile Subscriber Identity NG-5G-S-TMSI.

It should be noted that, for the specific implementation of the second information, the first service and the remote terminal identifier, reference may be made to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

S1003. The remote terminal establishes or restores an RRC connection according to the second information.

It should also be noted that, unless there is any contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure and their various optional schemes. The specific implementation methods of the above steps in this embodiment can also refer to the description in the embodiment shown in Figure 3 of the present disclosure, and will not be repeated here.

In this way, the remote terminal can establish or restore the RRC connection according to the second information when the remote terminal is in an idle state or an inactive state and determines that the third service contained in the second information sent by the relay terminal is a service that matches the first service, and determines that the paging terminal identifier sent by the relay terminal matches the remote terminal identifier of the remote terminal.

FIG11 is a flow chart of a connection establishment method according to an exemplary embodiment. The method may be executed by a network device in the above communication system. As shown in FIG11 , the method may include:

S1101. A network device sends a paging message to a relay terminal.

The paging message may include information about the second service of the network device paging.

In some embodiments, the second service may include a multicast service or a broadcast service.

In some embodiments, the information of the second service may also be referred to as second paging group information.

In some embodiments, the paging message may include at least one TMGI.

In some embodiments, the paging message may also include a paging terminal identifier.

It should be noted that the paging terminal identifier may also be referred to as a paging UE identifier, which is not limited in the embodiments of the present disclosure.

In some embodiments, the paging message is used by the relay terminal to send the second information to the remote terminal, and the second information includes the first The third service is information of three services, the third service is a service in the second service that matches the first service, the first service is a service that the remote terminal has joined, and the second information is used to trigger the remote terminal to establish or restore a radio resource control RRC connection.

In some embodiments, the second information can be used by the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and establish or restore an RRC connection based on the second information.

In some other embodiments, the paging message may include a paging terminal identifier, which is used by the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and the RRC connection is established or restored based on the second information.

In some embodiments, the remote terminal identifier may be a Next Generation 5G Network-Simplified Temporary Mobile Subscriber Identity NG-5G-S-TMSI.

It should be noted that the specific implementation methods of the first service, the second service, the third service, the second information, the paging message, the paging terminal identifier and the remote terminal identifier can refer to the specific description in the embodiment shown in FIG. 3 of the present disclosure, which will not be repeated here.

It should also be noted that, unless there is any contradiction, this embodiment can be combined with the aforementioned embodiments or implementation methods of the present disclosure and their various optional schemes. The specific implementation methods of the above steps in this embodiment can also refer to the description in the embodiment shown in Figure 3 of the present disclosure, and will not be repeated here.

Using the above method, the network device can send a paging message to the relay terminal so that the relay terminal can determine the second information matching the first service that the remote terminal has joined from the paging message, and send the second information to the remote terminal, so that the remote terminal can establish or restore the RRC connection based on the second information.

In some embodiments of the present disclosure, a connection establishment method is provided, which may include at least one of the following embodiments:

In embodiment 1, the remote terminal sends paging group information to the relay terminal.

In one implementation manner, the paging group information may carry first paging group information.

In some embodiments, the first paging group information may be carried in RemoteUEInformationSidelink.

In one implementation, the first paging group information may be the TMGI of a first service to which the remote terminal has joined, and the first service may be a multicast service or a broadcast service.

In some embodiments, the first paging group information may include one or more TMGIs.

In embodiment 2, the remote terminal sends paging group information to the relay terminal when the remote terminal is in an idle state or an inactive state.

In embodiment 3, the remote terminal receives the second paging group information sent by the relay terminal, and if it is determined that at least one TMGI carried in the second paging group information matches the first service to which the remote terminal has joined, and the remote terminal is in an inactive state, the RRC recovery process is triggered.

In an implementation manner, the second paging group information may carry one or more TMGIs.

In some embodiments, the second paging group information may be carried by UuMessageTransferSidelink.

In embodiment 4, the remote terminal receives the second paging group information and paging record sent by the relay terminal. If it is determined that the second paging group information carries at least one TMGI that matches the first service to which the remote terminal has joined, and the paging terminal identifier in the paging record matches the NG-5G-S-TMSI identifier of the remote terminal, the second paging group information is sent to the upper layer.

In some embodiments, the higher layer may be a non-access stratum.

In some embodiments, the NG-5G-S-TMSI identifier of the remote terminal may be pre-allocated to the remote terminal by the higher layer.

In Embodiment 5, the remote terminal receives the second paging group information sent by the relay terminal, and if it is determined that at least one TMGI carried in the second paging group information matches the first service to which the remote terminal has joined, and the remote terminal is in an idle state, the second paging group information is sent to a higher layer.

In Example 6, the relay terminal receives the first paging group information sent by the remote terminal, monitors the paging message sent by the network device, and if it is determined that at least one second paging group information carried in the paging message matches the first paging group information sent by the remote terminal, the second paging group information in the paging message is sent to the remote terminal.

In some embodiments, the second paging group information may be carried by UuMessageTransferSidelink.

It should be noted that the remote terminal in the above embodiments 1 to 6 can communicate with the network device through the relay terminal.

In an exemplary embodiment, the present disclosure further provides a communication system, which may include a remote terminal, a middle A relay terminal and a network device, wherein the remote terminal can execute the connection establishment method executed by the remote terminal in the aforementioned embodiment of the present disclosure; the relay terminal can execute the connection establishment method executed by the relay terminal in the aforementioned embodiment of the present disclosure; and the network device can execute the communication connection establishment method executed by the network device in the aforementioned embodiment of the present disclosure.

FIG12 is a block diagram of a relay terminal according to an exemplary embodiment. As shown in FIG12 , the relay terminal 153 may include:

The first receiving module 1201 is configured to receive first information sent by a remote terminal, where the first information indicates a first service that the remote terminal has joined;

The first receiving module 1201 is further configured to receive a paging message sent by a network device, wherein the paging message includes information of a second service paging by the network device;

The first sending module 1202 is configured to send second information to the remote terminal, where the second information includes information about a third service, where the third service is a service in the second service that matches the first service, and the second information is used to trigger the remote terminal to establish or restore a wireless resource control RRC connection.

In some embodiments, the first sending module 1202 is configured to determine whether the third service matching the first service exists in the second service; and send the second information to the remote terminal.

In some embodiments, the second information is further used to trigger the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state.

For example, the remote terminal determines that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and establishes or restores an RRC connection according to the second information.

In some embodiments, the paging message includes a paging terminal identifier; the second sending module 1202 is configured to send the paging terminal identifier to the remote terminal, the paging terminal identifier is used by the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and an RRC connection is established or restored according to the second information.

In some embodiments, the remote terminal identifier is the Next Generation 5G Network-Simplified Temporary Mobile User Identity NG-5G-S-TMSI.

In some embodiments, the first service comprises a multicast service or a broadcast service.

In some embodiments, the first information includes at least one temporary mobile group identity TMGI.

In some embodiments, the second information includes at least one TMGI.

Fig. 13 is a block diagram of a remote terminal according to an exemplary embodiment. As shown in Fig. 13, the remote terminal 151 may include:

The second sending module 1301 is configured to send first information to the relay terminal, where the first information indicates a first service that the remote terminal has joined;

The second receiving module 1302 is configured to receive second information sent by the relay terminal, where the second information includes information of a third service, where the third service is a service among the second services that matches the first service, and where the second service is a network device paging service;

The processing module 1303 is configured to establish or restore a radio resource control RRC connection according to the second information.

In some embodiments, the first sending module 1301 is configured to send the first information to the relay terminal when the remote terminal is in an idle state or an inactive state.

In some embodiments, the processing module 1303 is configured to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state; and establish or restore a radio resource control RRC connection according to the second information.

In some embodiments, the second receiving module 1302 is configured to receive a paging terminal identifier sent by the relay terminal; the processing module 1303 is configured to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal; and establish or restore a wireless resource control RRC connection according to the second information.

In some embodiments, the remote terminal identifier is the Next Generation 5G Network-Simplified Temporary Mobile User Identity NG-5G-S-TMSI.

In some embodiments, the first service comprises a multicast service or a broadcast service.

In some embodiments, the first information includes at least one temporary mobile group identity TMGI.

In some embodiments, the second information includes at least one TMGI.

Fig. 14 is a block diagram of a network device according to an exemplary embodiment. As shown in Fig. 14, the network device 160 may include:

The third sending module 1401 is configured to send a paging message to the relay terminal, the paging message including information of the second service of the network device paging, the paging message is used by the relay terminal to send the second information to the remote terminal, the second information includes information of the third service, the third service is a service in the second service that matches the first service, the first service is a service that the remote terminal has joined, and the second information is used to trigger the remote terminal to establish or restore a wireless resource control RRC connection.

In some embodiments, the second information is further used to trigger the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state.

In some embodiments, the paging message includes a paging terminal identifier, and the paging terminal identifier is used by the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and an RRC connection is established or restored according to the second information.

In some embodiments, the remote terminal identifier is the Next Generation 5G Network-Simplified Temporary Mobile User Identity NG-5G-S-TMSI.

In some embodiments, the first service comprises a multicast service or a broadcast service.

In some embodiments, the second information comprises at least one temporary mobile group identity TMGI.

Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

Fig. 15 is a block diagram of a communication device 3000 according to an exemplary embodiment. The communication device 3000 may be a terminal device in the communication system shown in Fig. 1 , or may be a network device in the communication system.

15 , the communication device 3000 may include one or more of the following components: a processing component 3002 , a memory 3004 , and a communication component 3006 .

The processing component 3002 can be used to control the overall operation of the communication device 3000, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 3002 can include one or more processors 3020 to execute instructions to complete all or part of the steps of the above-mentioned connection establishment method. In addition, the processing component 3002 can include one or more modules to facilitate the interaction between the processing component 3002 and other components. For example, the processing component 3002 can include a multimedia module to facilitate the interaction between the multimedia component and the processing component 3002.

The memory 3004 is configured to store various types of data to support the operation of the communication device 3000. Examples of such data include instructions for any application or method operating on the communication device 3000, contact data, phone book data, messages, pictures, videos, etc. The memory 3004 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

The communication component 3006 is configured to facilitate wired or wireless communication between the communication device 3000 and other devices. The communication device 3000 can access a wireless network based on a communication standard, such as Wi-Fi, 2G, 3G, 4G, 5G, 6G, NB-IOT, eMTC, etc., or a combination thereof. In an exemplary embodiment, the communication component 3006 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 3006 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the communication device 3000 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A field-programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components are used to execute the above connection establishment method.

The communication device 3000 may be an independent electronic device or a part of an independent electronic device. For example, in one embodiment, the electronic device may be an integrated circuit (IC) or a chip, wherein the integrated circuit may be one IC or a collection of multiple ICs; the chip may include but is not limited to the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip, SoC), etc. The above-mentioned integrated circuit or chip may be used to execute executable instructions (or codes) to implement the above-mentioned connection establishment method. The executable instructions may be stored in the integrated circuit or chip, or may be obtained from other devices or equipment, such as the integrated circuit or chip including a processor, a memory, and an interface for communicating with other devices. The executable instruction may be stored in the processor, and when the executable instruction is executed by the processor, the above-mentioned connection establishment method is implemented; alternatively, the integrated circuit or chip may receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the above-mentioned connection establishment method.

In an exemplary embodiment, the present disclosure further provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the steps of the connection establishment method provided by the present disclosure. By way of example, the computer-readable storage medium may be a non-temporary computer-readable storage medium including instructions, for example, the above-mentioned memory 3004 including instructions, and the above-mentioned instructions may be executed by the processor 3020 of the communication device 3000 to complete the above-mentioned connection establishment method. For example, the non-temporary computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and the computer program has a code portion for executing the above connection establishment method when executed by the programmable device.

Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (28)

A connection establishment method, characterized in that it is executed by a relay terminal, the method comprising: Receiving first information sent by a remote terminal, where the first information indicates a first service that the remote terminal has joined; Receiving a paging message sent by a network device, wherein the paging message includes information of a second service paging by the network device; Sending second information to the remote terminal, the second information including information of a third service, the third service being a service in the second service that matches the first service, and the second information being used to trigger the remote terminal to establish or restore a radio resource control RRC connection. The method according to claim 1, wherein sending the second information to the remote terminal comprises: Determining that the third service matching the first service exists in the second service; The second information is sent to the remote terminal. The method according to claim 1 or 2 is characterized in that the second information is also used to trigger the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state. The method according to claim 1 or 2, characterized in that the paging message includes a paging terminal identifier; the method further comprises: The paging terminal identifier is sent to the remote terminal, where the paging terminal identifier is used by the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and an RRC connection is established or restored according to the second information. The method according to claim 4 is characterized in that the remote terminal identifier is the next generation 5G network-simplified temporary mobile user identifier NG-5G-S-TMSI. The method according to any one of claims 1-5 is characterized in that the first service includes a multicast service or a broadcast service. The method according to any one of claims 1-6 is characterized in that the first information includes at least one temporary mobile group identifier TMGI. The method according to any one of claims 1 to 7, characterized in that the second information includes at least one TMGI. A connection establishment method, characterized in that it is executed by a remote terminal, the method comprising: Sending first information to the relay terminal, where the first information indicates a first service that the remote terminal has joined; receiving second information sent by the relay terminal, where the second information includes information of a third service, where the third service is a service among the second services that matches the first service, and where the second service is a network device paging service; A radio resource control RRC connection is established or restored according to the second information. The method according to claim 9, wherein sending the first information to the relay terminal comprises: The remote terminal is in an idle state or an inactive state, and sends the first information to the relay terminal. The method according to claim 9 or 10, characterized in that establishing or restoring the RRC connection according to the second information comprises: Determining that the third service is a service matching the first service, and the remote terminal is in an idle state or an inactive state; Establish or restore an RRC connection according to the second information. The method according to claim 9 or 10, characterized in that the method further comprises: receiving a paging terminal identifier sent by the relay terminal; The establishing or restoring the RRC connection according to the second information includes: Determining that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal; Establish or restore an RRC connection according to the second information. The method according to claim 12 is characterized in that the remote terminal identifier is the next generation 5G network-simplified temporary mobile user identifier NG-5G-S-TMSI. The method according to any one of claims 9 to 13, characterized in that the first service includes a multicast service or a broadcast service. The method according to any one of claims 9 to 14, characterized in that the first information includes at least one temporary mobile group identifier TMGI. The method according to any one of claims 9 to 15, characterized in that the second information includes at least one TMGI. A connection establishment method, characterized in that it is executed by a network device, and the method comprises: A paging message is sent to a relay terminal, wherein the paging message includes information about a second service that is paged by the network device, and the paging message is used by the relay terminal to send second information to a remote terminal, wherein the second information includes information about a third service, wherein the third service is a service in the second service that matches the first service, wherein the first service is a service that the remote terminal has joined, and wherein the second information is used to trigger the remote terminal to establish or resume a radio resource control (RRC) connection. The method according to claim 17 is characterized in that the second information is also used to trigger the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state. The method according to claim 17 is characterized in that the paging message includes a paging terminal identifier, the paging terminal identifier is used by the remote terminal to determine that the third service is a service that matches the first service, and the remote terminal is in an idle state or an inactive state, and the paging terminal identifier matches the remote terminal identifier of the remote terminal, and an RRC connection is established or restored according to the second information. The method according to claim 19 is characterized in that the remote terminal identifier is the next generation 5G network-simplified temporary mobile user identifier NG-5G-S-TMSI. The method according to any one of claims 17-20 is characterized in that the first service includes a multicast service or a broadcast service. The method according to any one of claims 17 to 21, characterized in that the second information includes at least one temporary mobile group identifier (TMGI). A relay terminal, characterized by comprising: A first receiving module is configured to receive first information sent by a remote terminal, wherein the first information indicates a first service that the remote terminal has joined; The first receiving module is further configured to receive a paging message sent by a network device, wherein the paging message includes information of a second service paging by the network device; The first sending module is configured to send second information to the remote terminal, wherein the second information includes information about the third service. Information, the third service is a service in the second service that matches the first service, and the second information is used to trigger the remote terminal to establish or restore a radio resource control RRC connection. A remote terminal, characterized by comprising: A second sending module is configured to send first information to the relay terminal, where the first information indicates a first service that the remote terminal has joined; A second receiving module is configured to receive second information sent by the relay terminal, wherein the second information includes information of a third service, the third service is a service among the second services that matches the first service, and the second service is a service of network device paging; The processing module is configured to establish or restore a radio resource control RRC connection according to the second information. A network device, comprising: The third sending module is configured to send a paging message to the relay terminal, the paging message including information of the second service of the network device paging, the paging message is used by the relay terminal to send the second information to the remote terminal, the second information includes information of the third service, the third service is a service in the second service that matches the first service, the first service is a service that the remote terminal has joined, and the second information is used to trigger the remote terminal to establish or restore a radio resource control RRC connection. A communication device, comprising: processor; a memory for storing processor-executable instructions; The processor is configured to execute the steps of the method described in any one of claims 1 to 8, or the processor is configured to execute the steps of the method described in any one of claims 9 to 16, or the processor is configured to execute the steps of the method described in any one of claims 17 to 22. A computer-readable storage medium having computer program instructions stored thereon, characterized in that when the computer program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 8 are implemented, or when the computer program instructions are executed by a processor, the steps of the method described in any one of claims 9 to 16 are implemented, or when the computer program instructions are executed by a processor, the steps of the method described in any one of claims 17 to 22 are implemented. A communication system, comprising: A relay terminal, wherein the relay terminal executes the method according to any one of claims 1 to 8; A remote terminal, wherein the remote terminal performs the method according to any one of claims 9 to 16; A network device, wherein the network device executes the method according to any one of claims 17 to 22.