Communication method and apparatus

Abstract

The present application discloses a communication method and apparatus. The method comprises: a first access and backhaul node receives a paging message from a network device, the paging message comprising a paging identifier, the paging identifier being used for indicating a first terminal device and a mobile termination of the first access and backhaul node, and the first terminal device being a terminal device served by the first access and backhaul node; and the first access and backhaul node sends the paging message to the first terminal device. In the present application, a paging message sent by a network device to an access and backhaul node may simultaneously page a mobile termination of the access and backhaul node and a terminal device served by the access and backhaul node, that is, the network device only needs to perform paging once to page the terminal device served by the access and backhaul node. Because paging does not need to be performed twice, for example, the mobile termination of the access and backhaul node is paged first and then the terminal device served by the access and backhaul node is paged, the paging delay and paging message overhead are reduced.

Description

Communication method and apparatus

[0001] Cross Reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411345929.8, filed on September 25, 2024, and entitled “A Communication Method and Apparatus”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a communication method and apparatus. BACKGROUND

[0004] In some scenarios of a terrestrial network (TN) and a non-terrestrial network (NTN), an access backhaul technology, such as an integrated access and backhaul (IAB) technology or a wireless access and backhaul (WAB) technology, is introduced from the perspective of wide coverage demand or the consideration of reducing deployment cost. The IAB technology and the WAB technology can support an access link and a backhaul link, thereby enabling flexible and dense deployment of a new radio (NR) cell.

[0005] In an IAB network, an IAB node (IAB node or IAB-node) can include a mobile termination (MT) of the IAB node (may be referred to as IAB node-MT or IAB-node-MT) and a distribute unit (DU) of the IAB node (may be referred to as IAB node-DU or IAB-node-DU). The DU of the IAB node can provide access services for ordinary terminal devices, and the MT of the IAB node can connect to a DU of a parent node or a DU of an IAB donor as an ordinary terminal device to access a core network. In a WAB network, a WAB node (WAB node or WAB-node) can include a MT of the WAB node (may be referred to as WAB node-MT or WAB-node-MT) and a base station (including a central unit (CU) and a DU) of the WAB node (may be referred to as WAB node-base station or IAB-node-base station). The base station of the WAB node can provide access services for ordinary terminal devices, and the MT of the WAB node can connect to other base stations as an ordinary terminal device to access a core network.

[0006] In an NTN network involving access backhaul, in order to save energy, the MT in the access backhaul node is often in a radio resource control (RRC) idle state or an RRC inactive state, and therefore, when a network device pages a terminal device, hierarchical paging needs to be performed, for example, the MT in the access backhaul node is first paged, and after the connection between the MT in the access backhaul node and the network device is established, the terminal device served by the access backhaul node is paged, which causes large paging delay and paging message overhead. SUMMARY

[0007] Embodiments of the present application provide a communication method and device for reducing paging delay and paging message overhead.

[0008] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a first access backhaul node. The first access backhaul node can be an access network device or a device (for example, a module, a communication module, a circuit or a chip responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core), a chip system or a processor) in the access network device, or can also be a logical node, a logical module or software capable of realizing all or part of the functions of the access network device. The method can include: receiving a paging message from a network device, the paging message including a paging identifier, the paging identifier being used to indicate a mobile terminal of the first access backhaul node and a first terminal device served by the first access backhaul node, the first terminal device being a terminal device served by the first access backhaul node; and sending the paging message to the first terminal device.

[0009] In an embodiment of the present application, a paging message sent by a network device (such as a core network device or other network device, such as an access network device) to an access backhaul node can simultaneously page a mobile terminal of the access backhaul node and a terminal device served by the access backhaul node, that is, the network device only needs to page once to page the terminal device served by the access backhaul node, and since it does not need to page twice (such as first paging the mobile terminal of the access backhaul node and then paging the terminal device served by the access backhaul node), the paging delay and the paging message overhead are reduced.

[0010] In a possible implementation, the paging identifier is calculated according to the identifier of the mobile terminal and the identifier of the first terminal device.

[0011] In this implementation, the paging identifier can only include one identifier, which is calculated according to the identifier of the mobile terminal of the access backhaul node and the identifier of the terminal device served by the access backhaul node. That is, when the network device pages the terminal device served by the access backhaul node, the paging message sent by the network device to the access backhaul node can only carry the one identifier, which reduces the paging message overhead compared to carrying multiple identifiers.

[0012] In a possible implementation, the paging identifier satisfies the following relationship: P_ID = MT_ID + UE_ID

[0013] Wherein, P_ID is the paging identifier, MT_ID is the identifier of the mobile terminal, and UE_ID is the identifier of the first terminal device.

[0014] In this embodiment, a manner for calculating the paging identity according to the identity of the mobile terminal of the access backhaul node and the identity of the terminal device served by the access backhaul node is provided. In addition, the paging identity can also be calculated in other manners.

[0015] In a possible implementation, the paging identity is an identity in the first identity list, and at least one identity in the first identity list is calculated according to the identity of the mobile terminal and the identity of at least one terminal device served by the first access backhaul node.

[0016] In this embodiment, a manner for the access backhaul node to determine the paging object is provided. For example, the access backhaul node can determine whether the paging object of the network device is at least one terminal device served by the access backhaul node by comparing the paging identity with at least one identity calculated according to the identity of the mobile terminal of the access backhaul node and the identity of at least one terminal device served by the access backhaul node. In addition, the access backhaul node can determine the paging object in other manners, which are not limited herein.

[0017] In a possible implementation, the paging identity includes the identity of the mobile terminal and the identity of the first terminal device.

[0018] In this embodiment, the paging identity can include two identities, which are the identity of the mobile terminal of the access backhaul node and the identity of the terminal device served by the access backhaul node. That is, the access backhaul node or the terminal device served by the access backhaul node can directly detect the identity of the terminal device served by the access backhaul node from the paging identity, without calculation, thereby improving the detection efficiency.

[0019] In a possible implementation, the identity of the first terminal device is an identity in the second identity list, and at least one identity in the second identity list is the identity of at least one terminal device served by the first access backhaul node.

[0020] In this embodiment, a manner for the access backhaul node to determine the paging object is provided. For example, the access backhaul node can determine whether the paging object of the network device is at least one terminal device served by the access backhaul node by comparing the identity of the terminal device included in the paging identity with the identity of at least one terminal device served by the access backhaul node. In addition, the access backhaul node can determine the paging object in other manners, which are not limited herein.

[0021] In a possible implementation, the paging message further includes a short message, and the short message includes first information, where the first information is used to indicate that at least one terminal device served by the first access backhaul node is paged by the network device.

[0022] In this implementation, the paging message can include information used to indicate that at least one terminal device served by the access backhaul node is paged by the network device, that is, the access backhaul node can directly detect from the paging message that at least one terminal device served by the access backhaul node is paged by the network device, without the need to determine whether at least one terminal device served by the access backhaul node is paged by the network device by comparing the paging identifier with the identifier of at least one terminal device served by the access backhaul node, thereby improving detection efficiency.

[0023] In a possible implementation, in the paging message, the short message is located before the paging identifier.

[0024] In this implementation, in the paging message, the information used to indicate that at least one terminal device served by the access backhaul node is paged by the network device can be located before the paging identifier, that is, if the access backhaul node detects the information, it is necessary to continue to detect the paging identifier to determine which terminal device served by the access backhaul node is paged by the network device; if the access backhaul node does not detect the first information, it is not necessary to continue to detect the paging identifier, thereby improving detection efficiency.

[0025] In a possible implementation, in the short message, the first information is located in at least one of the 5th bit to the 8th bit.

[0026] In this implementation, multiple possibilities of the location of the first information in the short message are provided, for example, the first information can be located in the 5th bit of the short message, or the first information can be located in the 6th bit and the 7th bit of the short message, in addition to which the first information can be located in other bits of the short message, which is not limited.

[0027] In a possible implementation, the method further includes: in a case where the distance between the location of the mobile terminal and the reference location is greater than a first distance threshold, performing tracking area updating, first identifier list updating, or second identifier list updating, at least one identifier in the first identifier list is calculated according to the identifier of the mobile terminal and the identifier of at least one terminal device served by the first access backhaul node, and at least one identifier in the second identifier list is the identifier of at least one terminal device served by the first access backhaul node.

[0028] In this embodiment, if the distance between the location of the mobile terminal of the access backhaul node and the reference location is greater than the first distance threshold, it indicates that the location of the mobile terminal of the access backhaul node has changed and moved to a tracking area outside the registered tracking area list, and thus the access backhaul node needs to perform tracking area update. Further, if the location of the mobile terminal of the access backhaul node has changed, the location of at least one terminal device served by the access backhaul node will also change, and thus the access backhaul node needs to update the identity of the at least one terminal device served by the access backhaul node.

[0029] In a possible implementation, the method further includes: determining a first paging frame from paging frames included in a discontinuous reception cycle of the mobile terminal according to the identity of the mobile terminal, and determining a first paging occasion from paging occasions included in the first paging frame, the first paging occasion being used for the first access backhaul node to receive the paging message from the network device.

[0030] In this embodiment, a way for an access backhaul node to determine a paging occasion is provided, for example, according to the identity of a mobile terminal of the access backhaul node, a paging frame is first determined from a plurality of paging frames included in a discontinuous reception cycle (i.e., a paging cycle) of the mobile terminal of the access backhaul node, and then a paging occasion is determined from a plurality of paging occasions included in the paging frame. In addition to this, the access backhaul node can also determine a paging occasion in other ways, which are not limited herein.

[0031] In a possible implementation, the first access backhaul node includes an IAB node and / or a WAB node.

[0032] In this embodiment, various possibilities of an access backhaul node are provided, for example, an IAB node, a WAB node, and in addition to this, the access backhaul node can also include other nodes, such as a network controlled repeater (NCR) node, which are not limited herein.

[0033] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a first terminal device. The first terminal device can be a terminal device or a device (for example, a module, a communication module, a circuit or a chip responsible for a communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core), a chip system or a processor) in the terminal device, or can also be a logic node, a logic module or software capable of realizing all or part of the terminal device function. The method can include: receiving a paging message from a first access backhaul node, the paging message including a paging identifier, the paging identifier being used to indicate a mobile terminal of the first terminal device and the first access backhaul node.

[0034] In a possible implementation, the paging identifier is calculated according to an identifier of the mobile terminal and an identifier of the first terminal device.

[0035] In a possible implementation, the paging identifier satisfies the following relationship: P_ID = MT_ID + UE_ID

[0036] Wherein, P_ID is the paging identifier, MT_ID is the identifier of the mobile terminal, and UE_ID is the identifier of the first terminal device.

[0037] In a possible implementation, the paging identifier includes the identifier of the mobile terminal and the identifier of the first terminal device.

[0038] In a possible implementation, the method further includes: in a case where the identifier of the mobile terminal is not detected from a third identifier list, performing tracking area update or the third identifier list update, at least one identifier in the third identifier list being an identifier of a mobile terminal of at least one access backhaul node serving the first terminal device.

[0039] In a possible implementation, the first access backhaul node includes an IAB node and / or a WAB node.

[0040] In a third aspect, the present disclosure provides a communication apparatus. The communication apparatus can be an access network device or a device (e.g., a module, a communication module, a circuit or a chip responsible for communication functions, a chip system or a processor) in an access network device, or can also be a logical node, a logical module or software capable of implementing all or part of the functions of the access network device. The communication apparatus has the functions of the first aspect. For example, the communication apparatus includes modules or units or means corresponding to the operations of the first aspect, which can be implemented in software, or implemented in hardware, or implemented by hardware executing corresponding software.

[0041] In a possible implementation, the communication apparatus includes an interface unit and a processing unit. The interface unit can be configured to transceive signals to implement communication between the communication apparatus and other apparatuses; and the processing unit can be configured to perform some internal operations of the communication apparatus. The functions performed by the processing unit and the interface unit can correspond to the operations of the first aspect.

[0042] In a possible implementation, the communication apparatus includes a processor. The processor can execute computer programs or instructions, which, when executed, cause the communication apparatus to implement the method in any possible implementation of the first aspect.

[0043] In a possible implementation, the communication apparatus includes a processor and a memory. The memory can store necessary computer programs or instructions for implementing the functions of the first aspect. The processor can execute the computer programs or instructions stored in the memory, which, when executed, cause the communication apparatus to implement the method in any possible implementation of the first aspect.

[0044] In a possible implementation, the communication apparatus includes a processor and an interface circuit. The processor is configured to communicate with other apparatuses through the interface circuit and perform the method in any possible implementation of the first aspect.

[0045] In a fourth aspect, the present disclosure provides a communication apparatus. The communication apparatus can be a terminal device or a device (e.g., a module, a communication module, a circuit or a chip responsible for communication functions, a chip system or a processor) in a terminal device, or can also be a logical node, a logical module or software capable of implementing all or part of the functions of the terminal device. The communication apparatus has the functions of the second aspect. For example, the communication apparatus includes modules or units or means corresponding to the operations of the second aspect, which can be implemented in software, or implemented in hardware, or implemented by hardware executing corresponding software.

[0046] In a possible implementation, the communication apparatus includes an interface unit and a processing unit. The interface unit can be configured to transceive signals to implement communication between the communication apparatus and other apparatuses. The processing unit can be configured to perform some internal operations of the communication apparatus. The functions performed by the processing unit and the interface unit can correspond to the operations described above in the second aspect.

[0047] In a possible implementation, the communication apparatus includes a processor. The processor can execute computer programs or instructions, which, when executed, cause the communication apparatus to implement the method in any possible implementation of the second aspect.

[0048] In a possible implementation, the communication apparatus includes a processor and a memory. The memory can store necessary computer programs or instructions for implementing the functions described above in the second aspect. The processor can execute the computer programs or instructions stored in the memory, which, when executed, cause the communication apparatus to implement the method in any possible implementation of the second aspect.

[0049] In a possible implementation, the communication apparatus includes a processor and an interface circuit. The processor is configured to communicate with other apparatuses through the interface circuit and perform the method in any possible implementation of the second aspect.

[0050] In a fifth aspect, the present application provides a communication system, which can include a first access backhaul node and a first terminal device. The first access backhaul node can perform the communication method provided in the first aspect, and the first terminal device can perform the communication method provided in the second aspect.

[0051] In a sixth aspect, the present application provides a computer-readable storage medium, which stores computer programs or instructions. When the computer programs or instructions are executed, the method in any possible implementation of any one of the first aspect to the second aspect is implemented.

[0052] In a seventh aspect, the present application provides a computer program product, which includes computer program codes. When the computer program codes are run, the method in any possible implementation of any one of the first aspect to the second aspect is implemented.

[0053] In an eighth aspect, the present application provides a chip or chip system, which is configured to read computer programs stored in a memory to perform the method in any possible implementation of any one of the first aspect to the second aspect.

[0054] The advantages of the second aspect to the eighth aspect and the embodiments thereof can refer to the advantages of the first aspect and any one of the embodiments thereof, and the repeated parts will not be discussed. BRIEF DESCRIPTION OF DRAWINGS

[0055] FIGs. 1A to 1M are architecture diagrams of several communication systems provided by embodiments of the present application;

[0056] FIG. 2A is a schematic diagram of a tracking area (TA) list provided by an embodiment of the present application;

[0057] FIG. 2B is a schematic diagram of a broadcast TA list provided by an embodiment of the present application;

[0058] FIG. 3 is a flowchart of a communication method provided by an embodiment of the present application;

[0059] FIG. 4A is a schematic diagram of a paging message provided by an embodiment of the present application;

[0060] FIG. 4B is a schematic diagram of another paging message provided by an embodiment of the present application;

[0061] FIG. 4C is a schematic diagram of another paging message provided by an embodiment of the present application;

[0062] FIG. 4D is a schematic diagram of a first paging frame and a first paging occasion provided by an embodiment of the present application;

[0063] FIG. 5 is a structural diagram of a communication apparatus provided by an embodiment of the present application;

[0064] FIG. 6 is a structural diagram of another communication apparatus provided by an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0066] Embodiments of the present application provide technical solutions that can be applied to various communication systems, for example, the 5th generation (5G) mobile communication system (such as a new radio (NR) system) or a future communication system. The method provided by the embodiments of the present application can be applied to a terrestrial network (TN) communication system or a non-terrestrial network (NTN) communication system. The NTN communication system may, for example, be a satellite communication system, or may include unmanned aerial vehicles, high altitude platform stations (HAPS), and other non-ground access network devices, and the embodiments of the present application do not limit this.

[0067] Embodiments of the present application will present various aspects, embodiments or features around a system including a plurality of devices, components, modules, etc. It should be understood and appreciated that each system can include additional devices, components, modules, etc., or can not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. In addition, combinations of these solutions can also be used.

[0068] For ease of understanding, first, a communication system to which embodiments of the present application can be applied is described.

[0069] FIG. 1A shows an architecture diagram of an NTN communication system provided by embodiments of the present application. The communication system can include a terminal device, a first access network device and a second access network device. Among them, the communication link between the first access network device and the second access network device is a feedback link (or called a feeder link); the communication link between the second access network device and the terminal device is a service link.

[0070] The first access network device can be a gateway (or called a ground station, an earth station, a gateway station, a gateway or a gateway station), or a base station.

[0071] The second access network device can be a satellite (or called a satellite base station), or a HAPS, etc. Among them, the satellite can include at least one of the following: a geostationary earth orbit (GEO) satellite (or called a geosynchronous orbit satellite) or a non-geostationary earth orbit (NGEO). The non-geostationary earth orbit satellite can include at least one of the following: a medium earth orbit (MEO) satellite or a low earth orbit (LEO) satellite. This is not limited here.

[0072] In the embodiments of the present application, the communication mode of the second access network device can include two modes, i.e., a regenerative mode and a transparent mode (also referred to as a transparent mode). When the communication mode of the second access network device is the regenerative mode, the second access network device can have all or part of the functions of a base station and can be regarded as a base station. In this case, the second access network device can support functions such as radio frequency filtering, frequency conversion and amplification, demodulation or decoding, encoding or modulation, and can perform error detection, correction and recovery operations on signals, thereby improving the signal quality. For example, the second access network device can include a next generation NodeB (gNB) or a distribute unit (DU).

[0073] It should be understood that FIG. 1A only shows one first access network device and one second access network device, and in actual use, an architecture with multiple first access network devices and / or multiple second access network devices can be adopted as needed. Each second access network device can provide services to one or more terminal devices, each second access network device can correspond to one or more first access network devices, each first access network device can correspond to one or more second access network devices, which are not specifically limited in the present application.

[0074] The satellite communication system shown in the present application can have various possible architectures, for example, any one of architectures 1 to 3.

[0075] Architecture one: FIG. 1B shows an architecture diagram of a satellite communication system in a transparent mode according to an embodiment of the present application. As shown in FIG. 1B, the access network includes a satellite, an NTN gateway, and a ground base station. The terminal device and the ground base station can communicate through an air interface (for example, a Uu interface). The satellite and the NTN gateway can be considered as a radio frequency remote unit (RRU) of the ground base station, and can implement transparent forwarding of signals. The ground base station and the core network (CN) can communicate through a next generation (NG) interface. The core network and the data network (DN) can communicate through an N6 interface. The satellite supports functions such as radio frequency filtering, frequency conversion, and amplification, and does not change the waveform of the signal; that is, the satellite can be used as an analog radio frequency repeater (RF repeater) or a layer 1 (L1) relay, and can regenerate the physical layer signal.

[0076] Architecture two: FIG. 1C shows an architecture diagram of a satellite communication system in a regenerative mode according to an embodiment of the present application. As shown in FIG. 1C, the access network includes a satellite and an NTN gateway. The satellite has part or all of the functions of the access network device, and can be referred to as a satellite base station. The satellite can provide wireless access services and schedule wireless resources for terminal devices accessing the network through the satellite. The terminal device and the satellite can communicate through an air interface (for example, a Uu interface), the satellite and the core network can communicate through an NG interface, and the core network and the DN can communicate through an N6 interface. Optionally, in the process of communication between the satellite and the core network, the satellite can communicate with the core network through the NTN gateway. Specifically, the satellite and the NTN gateway can communicate through an NG interface, and the NTN gateway and the core network can communicate through an NG interface. The NTN gateway can connect network segments of different protocols. The NG interface between the satellite and the NTN gateway can be deployed on a satellite radio interface (SRI). Optionally, in this architecture, the satellites do not have an inter-satellite link (ISL).

[0077] Architecture three: FIG. 1D shows an architecture diagram of a satellite communication system in another regeneration mode according to an embodiment of the present application. As shown in FIG. 1D, the access network includes satellites and NTN gateways. Among them, the satellite has part or all of the functions of the access network device, which can be referred to as a satellite base station. The satellite can provide wireless access services and schedule wireless resources for terminal devices accessing the network through the satellite. The terminal device and the satellite can communicate through the air interface (for example, the Uu interface), the satellite and the core network can communicate through the NG interface, and the core network and the DN can communicate through the N6 interface. The satellites can communicate through the Xn interface, which can be deployed on the ISL. The specific content of the communication between the satellite and the core network through the NG interface can refer to the description of architecture two, which will not be described here.

[0078] In the embodiments of the present application, the terminal device can also be referred to as a user equipment (user equipment, UE), an access terminal, a subscriber unit, a user station, a mobile station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent or a user device.

[0079] The terminal device can be a device that provides a wireless communication function, for example, a handheld device, a vehicle-mounted device, and the like with a wireless connection function. Currently, some examples of terminal devices are: a mobile phone, a satellite mobile terminal, a cellular phone, a smart phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device (for example, a smart watch, a smart bracelet, a pedometer, smart glasses, and the like), a vehicle-mounted device (for example, a car, a bicycle, an electric vehicle, a ship, a train, a high-speed rail, and the like), a satellite terminal, a virtual reality (VR) device, an augmented reality (AR) device, a smart point of sale (POS) machine, a customer-premises equipment (CPE), a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery or telemedicine or telehealth services, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home (for example, a refrigerator, a television, an air conditioner, an electricity meter, and the like), a smart robot, a mechanical arm, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with a wireless communication function, a computing device, or another processing device connected to a wireless modem, a flight device (for example, a smart robot, a hot air balloon, a drone, an airplane), a terminal in a 5G network, or a terminal in a future evolved public land mobile network (PLMN), and the like, and the embodiments of the present application are not limited thereto.

[0080] By way of example and not limitation, in embodiments of the present application, the terminal device can also be a mobile termination (MT) in an access backhaul node. For example, the terminal device can be an MT in an integrated access and backhaul (IAB) node, which can be regarded as a terminal device when the IAB node faces its parent node, at this time, the IAB node plays the role of an MT. For another example, the terminal device can be an MT in a wireless access and backhaul (WAB) node. For yet another example, the terminal device can be an MT in a network controlled repeater (NCR) node.

[0081] Embodiments of the present application do not limit the form of the terminal device, and the device for implementing the function of the terminal device can be a terminal device; or can be a device capable of supporting the terminal device to implement the function, such as a chip system. The device can be installed in the terminal device or used in matching with the terminal device. In embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0082] In embodiments of the present application, the access network device is a device that provides a wireless communication function for a terminal device, and the terminal device can communicate with the core network device through the access network device. The access network device, as a node in a radio access network (RAN), can also be referred to as a base station, a RAN node (or device), or an access point (AP). The communication system can include multiple access network devices, which can be nodes of the same type or nodes of different types. In some scenarios, the roles of the access network device and the terminal device are relative, for example, network element #A can be a helicopter or a drone, which can be configured as a mobile base station, access the RAN through network element #B, and for those terminals that access the RAN through network element #A, network element #A is a base station; but for network element #B, network element #A is a terminal device.

[0083] In a possible scenario, the access network device can be a base station (base station, BS), a transmission reception point (transmission reception point, TRP), a transmission point (transmission point, TP), a base station in a future mobile system, a satellite, an IAB node, a WAB node, an NCR node, a mobile switching center, a high-altitude platform or a satellite, etc. The access network device can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, or a wireless controller in a cloud RAN (cloud RAN, CRAN) scenario. The access network device can also be a device that plays a base station function in device to device (device to device, D2D) communication, vehicle networking communication, unmanned aerial vehicle communication, machine communication. Optionally, the access network device can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (vehicle to everything, V2X) technology can be a road side unit (road side unit, RSU).

[0084] In another possible scenario, a terminal device accesses a network device through a plurality of access network devices, and the terminal device cooperates with the pluralityity of access network devices to implement wireless access. Different access network devices implement part of functions of a base station. For example, an access network device can be a central unit (CU), a DU, a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), and the like. The CU and the DU can be separately configured, or can be included in the same network element, for example, a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, for example, an RRU, an active antenna processing unit (AAU), or a remote radio head (RRH). The CU can implement functions of a radio resource control (RRC) layer and a packet data convergence protocol (PDCP) layer of the base station, and can also implement functions of a service data adaptation protocol (SDAP) layer. The DU can implement functions of a radio link control (RLC) layer and a medium access control (MAC) layer of the base station, and can also implement part of functions of a physical layer or all functions of the physical layer. For details of the protocol layers, refer to related technical specifications of the 3rd generation partnership project (3GPP). It can be understood that the access network device can be a CU, or a DU, or a device including the CU and the DU. In addition, the CU can be divided into an access network device in an access network, or the CU can be divided into an access network device in a core network, which is not limited here. For example, as shown in FIG. 1E, the access network device includes the CU and at least one DU, the CU can be connected with the DU through an F1 interface, and can control at least one DU.

[0085] The CU (or CU-CP and CU-UP), DU or RU can also have different names in different systems, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CUs (or CU-CPs, CU-UPs), DUs and RUs in the embodiments of the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0086] In the embodiments of the present application, the form of the access network device is not limited, and the device for implementing the function of the access network device can be the access network device; or can be a device capable of supporting the access network device to implement the function, such as a chip system. The device can be installed in the access network device or used in matching with the access network device.

[0087] The access network device and the terminal device can be fixed in position or movable. The access network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the access network device and the terminal device.

[0088] In an embodiment of the present application, the core network device can process and forward the signaling and data of a user. For example, an access and mobility management function (AMF), a session management function (SMF), a user plane gateway, and the like. The user plane gateway can be a server with functions of mobility management, routing, forwarding, and the like for user plane data, such as a serving gateway (SGW), a packet data network gateway (PGW), a user plane function (UPF), and the like. The AMF and the SMF are equivalent to a mobility management entity (MME) in a long term evolution (LTE) system. The AMF is mainly responsible for admission, and the SMF is mainly responsible for session management. Of course, the core network device can also include other network elements, which are not listed one by one here.

[0089] In an embodiment of the present application, the form of the core network device is not limited, and the device for implementing the function of the core network device can be the core network device; or can be a device capable of supporting the core network device to implement the function, such as a chip system. The device can be installed in the core network device or used in matching with the core network device.

[0090] The following describes the communication system architecture related to IAB and WAB based on the content shown in FIGS. 1A-1E and the above other content.

[0091] FIG. 1F shows a diagram of another communication system architecture provided in an embodiment of the present application. FIG. 1F takes the communication system architecture related to IAB as an example for illustration.

[0092] The purpose of IAB is to support wireless backhaul and relay links, thereby enabling flexible and very dense deployment of NR cells without the need to proportionally encrypt wired transport networks. Typical deployment scenarios for IAB include outdoor small cell deployments, indoor small cell deployments, and even mobile relays (e.g., on buses or trains).

[0093] As shown in FIG. 1F, the communication system can include a terminal device, an IAB donor (IAB-donor or IAB-donor), and an IAB node (IAB-node or IAB-node). The terminal device in FIG. 1F can be the terminal device involved in any of FIGs. 1A-1E. The IAB donor can be a base station supporting IAB additional functions, and can be connected to a core network through a non-IAB technology (for example, optical fiber), and provide access (for example, provide access through a backhaul link or an access link) for a terminal device or an IAB node. The IAB node can support access through NR (for example, through an access link) and backhaul (for example, through a backhaul link). Any of the IAB donor and the IAB node shown in FIG. 1F can be the access network device (for example, the first access network device, the second access network device, the satellite, the NTN gateway, or the ground base station) involved in any of FIGs. 1A-1E.

[0094] FIG. 1G shows a diagram of another communication system architecture provided by the embodiments of the present application. The network architecture shown in FIG. 1G can include the network architecture involved in the IAB donor and the IAB node in FIG. 1F, and the related content can be referred to the foregoing description of FIG. 1F.

[0095] As shown in FIG. 1G, the communication system includes a 5G core network (5GC), an IAB donor, and one or more IAB nodes (two IAB nodes are shown in the figure as an example). Optionally, the communication system also includes a base station (such as gNB). It should be understood that the core network is taken as an example of 5GC in the figure, and the core network can also be other core networks, such as the core network in the future communication system.

[0096] As shown in FIG. 1G, the IAB node can include an MT of the IAB node (which can be referred to as an IAB-node-MT or IAB-node-MT) and a DU of the IAB node (which can be referred to as an IAB-node-DU or IAB-node-DU). The MT of the IAB node can be connected to the DU of the parent node or the DU of the IAB donor as a normal terminal device. The DU of the IAB node can be a pole station cell on the access side of the IAB node, and can provide blind coverage to provide access for a normal terminal device or the MT of a subordinate IAB node. When an IAB node provides access for the MT of a subordinate IAB node, the IAB node can be referred to as the parent node of the subordinate IAB node.

[0097] The IAB donor can include a CU of the IAB donor (which can be referred to as an IAB-donor-CU or IAB-donor-CU) and a DU of the IAB donor (which can be referred to as an IAB-donor-DU or IAB-donor-DU). The CU of the IAB donor can be connected to the DU of the IAB donor and the DUs of the IAB nodes through an F1 interface. The CU of the IAB donor can be connected to other base stations (such as through an Xn-C interface), which can access the 5GC, or the CU of the IAB donor can directly access the 5GC (such as through an NG interface). The DU of the IAB donor can provide access for ordinary terminal devices or IAB nodes.

[0098] FIG. 1H shows an architecture diagram of another communication system according to an embodiment of the present application. FIG. 1H takes the communication system architecture involving a WAB as an example for illustration.

[0099] As shown in FIG. 1H, the communication system includes a terminal device, a 5GC, one or more WAB nodes (one WAB node is taken as an example for illustration in the figure). Optionally, the communication system further includes a base station (such as a gNB). It should be understood that the core network taken as the 5GC in the figure can also be other core networks, such as the core network in a future communication system.

[0100] As shown in FIG. 1H, the WAB node can include a base station (such as a gNB) of the WAB node (which can be referred to as a WAB-node-BS or WAB-node-BS) and an MT of the WAB node (which can be referred to as a WAB-node-MT or WAB-node-MT).

[0101] The base station of the WAB node can serve as a complete base station (including a DU and a CU) to provide access for ordinary terminal devices.

[0102] The MT of the WAB node can be connected to other base stations (such as through a Uu interface) to access the 5GC (such as through an N2 interface or an N3 interface). The MT of the WAB node can carry the service data (including control plane service and data plane service) of the ordinary terminal devices served by the base station of the WAB node by establishing a session (such as a protocol data unit (PDU) session).

[0103] The WAB node shown in FIG. 1H can be any of the access network devices (for example, the first access network device, the second access network device, the satellite, the NTN gateway, or the ground base station) involved in any of FIGS. 1A-1E.

[0104] FIG. 1I, FIG. 1J, FIG. 1K, FIG. 1L, FIG. 1M show the architecture of the communication system to which embodiments of the present application are applicable. Among them, FIG. 1I, FIG. 1J, FIG. 1K take the communication system architecture involving IAB as an example for illustration. FIG. 1L, FIG. 1M take the communication system architecture involving WAB as an example for illustration. It can be understood that the embodiments of the present application do not limit the location of the core network, for example, the core network can be located on the ground, or the core network can be located in the air, or part of the core network function can be located in the air, etc.

[0105] In FIG. 1I, TN nodes act as IAB hosts, and NTN nodes act as IAB nodes. For example, TN nodes D#1 and D#2 act as IAB hosts to provide backhaul services and access to the core network. NTN nodes N#1, N#2 and N#3 act as IAB nodes to provide access services for terminal devices and / or other network nodes.

[0106] In FIG. 1J, NTN nodes act as IAB hosts, and NTN nodes and TN nodes act as IAB nodes. For example, NTN nodes D#1 and NTN nodes D#2 act as IAB hosts to provide backhaul services and access to the core network. NTN nodes N#1 and N#2 and TN nodes N#3 and N#4 act as IAB nodes to provide access services for terminal devices and / or other network nodes.

[0107] In FIG. 1K, NTN nodes and TN nodes act as IAB hosts, and NTN nodes act as IAB nodes. For example, NTN nodes D#1 and TN nodes D#2 act as IAB hosts to provide backhaul services and access to the core network. NTN nodes N#1 and N#2 act as IAB nodes to provide access services for terminal devices and / or other network nodes.

[0108] In FIG. 1L, TN nodes act as WAB nodes. For example, TN nodes W#1 and W#2 act as WAB nodes, carrying both WAB node-MT and WAB node-base station functions, serving terminal devices within its coverage range as WAB node-base station, and connecting to NTN nodes as WAB node-MT to provide backhaul services for terminal devices served by the WAB node-base station. The NTN nodes can access the core network.

[0109] In FIG. 1M, NTN nodes act as WAB nodes. For example, NTN node W#1 acts as a WAB node, carrying both WAB node-MT and WAB node-base station functions, serving terminal devices within its coverage range as WAB node-base station, and connecting to other NTN nodes or TN nodes as WAB node-MT to provide backhaul services for terminal devices served by the WAB node-base station. The other NTN nodes or the TN nodes can access the core network.

[0110] Scenarios applicable in embodiments of the present application are various. In addition to the above scenarios, the NTN node and / or the TN node can also be flexibly configured as one or more of the following according to requirements: an IAB donor in the NTN network system architecture, an IAB node in the NTN network system architecture, an IAB donor in the TN network system architecture, an IAB node in the TN network system architecture, a WAB node in the NTN network system architecture, and a WAB node in the TN network system architecture. The scheme provided in embodiments of the present application can also be applicable to inter-satellite links and feeder links

[0111] In embodiments of the present application, the NTN node can be a second access network device in FIG. 1A or an apparatus (for example, a module, a communication module, a circuit, a chip (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core), a chip system or a processor circuit, a chip, a chip system or a processor) in the second access network device; and / or, the NTN node can be a satellite in FIGS. 1B to 1D or an apparatus (for example, a module, a communication module, a circuit, a chip (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor circuit, a chip, a chip system or a processor) in the satellite. The TN node can be a ground-based access network device or an apparatus (for example, a module, a communication module, a circuit, a chip (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor circuit, a chip, a chip system or a processor) in the access network device.

[0112] The related terms involved in embodiments of the present application are explained below. It can be understood that these explanations are to make embodiments of the present application easier to understand, and should not be regarded as limiting the scope of protection required by the present application.

[0113] 1) Tracking area (TA)

[0114] TA is a concept set up for location management of terminal devices, which is defined as a free movement area in which the terminal device does not need to update the location. In a TN network, the TA is configured at the cell level, one cell can be configured with one TA, and multiple cells can be configured with the same TA. One TA can correspond to one TA code (TAC). Multiple TAs can form a TA list, and the network device can assign a TA list to the terminal device, which does not need to perform TA update (TAU) when the terminal device moves in the TA in the TA list; when the terminal device moves to a TA outside the TA list, it needs to perform TA update, and the network device reassigns a new TA list to the terminal device, which can include some TAs in the original TA list.

[0115] FIG. 2A is a schematic diagram of a TA list according to an embodiment of the present application. As shown in FIG. 2A, TA list 1 includes TA1 to TA6, TA list 2 includes TA4 to TA9, and TA list 3 includes TA10 to TA15. The network device assigns TA list 1 to the terminal device. When the terminal device moves to TA4, the terminal device performs TA update, and the network device reassigns TA list 2 to the terminal device. When the terminal device moves to TA10, the terminal device performs TA update, and the network device reassigns TA list 3 to the terminal device.

[0116] FIG. 2B is a schematic diagram of a broadcast TA list according to an embodiment of the present application. As shown in FIG. 2B, taking a satellite as an NTN node in an NTN network as an example, the satellite can broadcast a TA list. When the terminal device receives all TAs in the TA list broadcast by the satellite, none of which belongs to the TAs registered by the terminal device, the terminal device needs to perform TA update.

[0117] 2) Paging

[0118] When the terminal device is in an RRC idle state or an RRC inactive state, if the terminal device has traffic, the network device (such as a core network device or an access network device) can send a paging message (also referred to as paging for short) to page the terminal device. After receiving the paging message, the terminal device can enter an RRC connected state to perform traffic.

[0119] In an NTN network involving access backhaul (such as IAB and WAB), in order to save energy, the MT in the access backhaul node is often in an RRC idle state or an RRC inactive state, so when the network device pages the terminal device, hierarchical paging is needed, for example, the MT in the access backhaul node is paged first, and after the connection between the MT in the access backhaul node and the network device is established, the terminal device served by the access backhaul node is paged, which results in large paging delay and paging message overhead.

[0120] For example, taking the communication system architecture shown in FIG. 1M as an example. TN node W#1 includes WAB node 1-MT and WAB node 1-base station as WAB node 1, wherein the WAB node 1-base station can provide access services for terminal device 1, and the WAB node 1-MT can be connected with an NTN node which can access a core network. TN node W#2 includes WAB node 2-MT and WAB node 2-base station as WAB node 2, wherein the WAB node 2-base station can provide access services for terminal device 2, and the WAB node 2-MT can be connected with an NTN node which can access a core network. The process of the core network device paging the terminal device 1 includes the following steps.

[0121] Step 1: The core network device sends a paging message 1 to the WAB node 1-MT, and correspondingly, the WAB node 1-MT receives the paging message 1 from the core network device, wherein the paging message 1 is used to page the WAB node 1-MT.

[0122] Step 2: The WAB node 1-MT establishes a PDU session between the core network device and the WAB node 1-base station.

[0123] Step 3: The core network device sends a paging message 2 to the WAB node 1-base station, and correspondingly, the WAB node 1-base station receives the paging message 2 from the core network device, wherein the paging message 2 is used to page the terminal device 1.

[0124] Step 4: The WAB node 1-base station sends a paging message 2 to the terminal device 1, and correspondingly, the terminal device 1 receives the paging message 2 from the WAB node 1-base station.

[0125] It can be seen that when the core network device pages the terminal device 1, hierarchical paging is needed, which results in large paging delay and paging message overhead.

[0126] In view of this, the embodiment of the present application provides a communication method for reducing the paging delay and the paging message overhead.

[0127] In the embodiment of the present application, “when”, “if” and “whether” all refer to the objective situation that the device will make corresponding processing, not limited to time, and does not require the device to have a judgment action when it is implemented, nor does it mean that there are other limitations. Unless otherwise specified, “if” and “whether” can be replaced, “when” and “in the case of” can be replaced. “When” and “if” / “whether” can be replaced.

[0128] In the embodiments of this application, the word "exemplary" or "for example" is used to mean serving as an example, instance, or illustration. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the embodied examples are intended to present concepts in a concrete manner. In the embodiments of this application, the word "include" and "comprise" and the like are used in an inclusive sense, meaning that additional information, parameters, features, and the like are not precluded.

[0129] In this document, "for indicating" can include "for directly indicating" and "for indirectly indicating". For example, when describing that certain information is for indicating information I, it can include that the information directly indicates I or indirectly indicates I, and does not mean that I must be carried in the information.

[0130] The information indicated by the information is called to be indicated information, and in the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be indicated only by a part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, a protocol stipulates), thereby reducing the indication overhead to a certain extent. At the same time, the common part of each information can be identified and uniformly indicated, so as to reduce the indication overhead caused by separately indicating the same information.

[0131] In addition, the specific indication manner can also be various existing indication manners, for example, but not limited to, the above-mentioned indication manners and various combinations thereof. As described above, for example, when multiple information of the same type needs to be indicated, the indication manners of different information can be different. In the specific implementation process, the required indication manner can be selected according to the specific needs, and the selected indication manner is not limited in the embodiments of this application. In this way, the indication manner involved in the embodiments of this application should be understood as covering various methods that can enable the to-be-indicated party to know the to-be-indicated information.

[0132] In the embodiments of this application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, and also includes indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as "output" of a chip interface, and "receiving" can also be understood as "input" of a chip interface.

[0133] The information can be processed, such as encoding, modulation, etc., between the source end and the destination end of the information transmission, but the destination end can understand the effective information from the source end. Similar expressions in the embodiments of the present application can be similarly understood, and will not be described again.

[0134] In the embodiments of the present application, the number of nouns, unless otherwise specified, represents "a singular noun or a plural noun", that is, "one or more". "At least one" means one or more, and "multiple" means two or more. The association relationship of the associated objects is described by "and / or", which means that there can be three relationships, for example, A and / or B, which can represent the following cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. For example, A / B represents A or B. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c means a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0135] The ordinal numbers "first", "second", and the like mentioned in the embodiments of the present application are used to distinguish a plurality of objects, and are not used to limit the size, content, order, time sequence, priority, or importance of the plurality of objects. For a technical feature, the technical features in the technical feature are distinguished by "A", "B", "C", and "D". There is no order or size order between the technical features described by "A", "B", "C", and "D".

[0136] The scheme provided by the embodiments of the present application will be described in detail below with reference to the drawings. Referring to FIG. 3, FIG. 3 is a flow diagram of a communication method provided by the embodiments of the present application. For ease of understanding, the interaction between the network device, the first access backhaul node, and the first terminal device is taken as an example for introduction in FIG. 3.

[0137] The network device can be an access network device or an apparatus (for example, a module, a communication module, a circuit, a chip (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor circuit, a chip, a chip system, or a processor) in the access network device shown in any one of FIGS. 1A to 1E; or it can also be a core network device or an apparatus (for example, a module, a communication module, a circuit, a chip (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor circuit, a chip, a chip system, or a processor) in the core network device shown in any one of FIGS. 1A to 1E.

[0138] The first access backhaul node can be an access network device or an apparatus (e.g., a module, a communication module, a circuit, a chip (such as a modem chip, or an SoC chip or a SIP chip containing a modem core), a chip system or a processor circuit, a chip, a chip system or a processor) in the access network device shown in any one of FIGS. 1A-1E. For example, the first access backhaul node can be an IAB node and / or a WAB node, and specific contents can be referred to the description of FIGS. 1F-1M above, which will not be repeated here.

[0139] The first terminal device can be a terminal device or an apparatus (e.g., a module, a communication module, a circuit, a chip (such as a modem chip, or an SoC chip or a SIP chip containing a modem core), a chip system or a processor circuit, a chip, a chip system or a processor) in the terminal device shown in any one of FIGS. 1A-1E.

[0140] The embodiments of the present application can be applicable to the system architecture of NTN, and can also be applicable to the system architecture of NTN and TN fusion. The first access backhaul node can be an NTN node or a TN node. For example, when the first access backhaul node is an IAB node, the first access backhaul node can be the NTN node N#1, the NTN node N#2 or the NTN node N#3 in FIG. 1I, and the IAB host can be the TN node D#1 or the TN node D#2 in FIG. 1I; or the first access backhaul node can be the NTN node N#1, the NTN node N#2, the TN node N#3 or the TN node N#4 in FIG. 1J, and the IAB host can be the NTN node D#1 or the NTN node D#2 in FIG. 1J; or the first access backhaul node can be the NTN node N#1 or the NTN node N#2 in FIG. 1K, and the IAB host can be the NTN node D#1 or the TN node D#2 in FIG. 1K. For another example, when the first access backhaul node is a WAB node, the first access backhaul node can be the TN node W#1 or the TN node W#2 in FIG. 1L; or the first access backhaul node can be the NTN node W#1 in FIG. 1M.

[0141] As shown in FIG. 3, the flow of the communication method includes the following steps.

[0142] S301, the network device sends a paging message to the first access backhaul node, and correspondingly, the first access backhaul node receives the paging message from the network device.

[0143] In the embodiments of the present application, the paging message can include a paging identifier. The paging identifier can be determined according to the paging object of the network device. The paging object of the network device can be the first terminal device or the mobile terminal of the first access backhaul node.

[0144] It can be understood that the paging message is one message, not multiple messages.

[0145] It can be understood that the first terminal device is not a mobile terminal of the first access backhaul node, that is, the first terminal device can be a terminal device served by the first access backhaul node, or can be a terminal device served by another access backhaul node (for example, the second access backhaul node), and the embodiments of the present application do not limit this. For ease of description, the following takes the first terminal device as an example of a terminal device served by the first access backhaul node. It can be understood that when the access backhaul node is an IAB node, the terminal device served by the access backhaul node is essentially a terminal device served by the DU of the access backhaul node, and when the access backhaul node is a WAB node, the terminal device served by the access backhaul node is essentially a terminal device served by the base station of the access backhaul node.

[0146] The following will introduce the paging identifier according to the paging object of the network device.

[0147] Case A1, when the paging object of the network device is the first terminal device, the paging identifier can be used to indicate the first terminal device and the mobile terminal of the first access backhaul node.

[0148] That is, when the paging object of the network device is not the mobile terminal of the first access backhaul node, but the terminal device served by the first access backhaul node, the paging message sent by the network device to the first access backhaul node can simultaneously page the mobile terminal of the first access backhaul node and the terminal device served by the first access backhaul node, that is, the network device only needs to page once to page the terminal device served by the first access backhaul node. Since it is not necessary to page twice to page the terminal device served by the first access backhaul node, such as first paging the mobile terminal of the first access backhaul node and then paging the terminal device served by the first access backhaul node, the paging delay and paging message overhead are reduced.

[0149] The paging identifier can include one identifier, which is calculated according to the identifier of the mobile terminal of the first access backhaul node and the identifier of the first terminal device. It can be understood that when the network device pages the first terminal device, the paging message sent by the network device to the first access backhaul node can only carry this one identifier, which reduces the paging message overhead compared to carrying multiple identifiers.

[0150] The identifier of the first terminal device can be determined according to a 5G-system-temporary mobile subscriber identity (5G-S-TMSI) of the first terminal device, an inactive radio network temporary identifier (I-RNTI), or another identifier. For example, the identifier of the first terminal device is UE_ID = 5G-S-TMSI mod M, where mod is a modulus operator, and M can be 128, 256, 512, 1024, 2048, or the like.

[0151] The identifier of the mobile terminal of the first access backhaul node can be determined according to a 5G-S-TMSI of the mobile terminal of the first access backhaul node. For example, the identifier of the mobile terminal of the first access backhaul node is MT_ID = 5G-S-TMSI mod 1024, where mod is a modulus operator.

[0152] For example, FIG. 4A is a schematic diagram of a paging message according to an embodiment of the present application. As shown in FIG. 4A, the paging message includes a paging identifier P_ID, which is calculated according to the identifier UE_ID of the first terminal device and the identifier MT_ID of the mobile terminal of the first access backhaul node. For example, P_ID = MT_ID + UE_ID.

[0153] It can be understood that the calculation rule for calculating the paging identifier according to the identifier of the mobile terminal of the first access backhaul node and the identifier of the first terminal device can be preconfigured, or can be defined by a standard, or can be agreed upon in advance by the network device, the first access backhaul node, and the terminal device served by the first access backhaul node, and the embodiments of the present application do not limit this.

[0154] Alternatively, the paging identifier can include two identifiers, which are the identifier of the mobile terminal of the first access backhaul node and the identifier of the first terminal device, respectively. It can be understood that, after the first access backhaul node receives a paging message from the network device, the identifier of the first terminal device can be directly detected from the paging identifier included in the paging message, without the need for calculation, thereby improving the detection efficiency.

[0155] For example, FIG. 4B is a schematic diagram of another paging message according to an embodiment of the present application. As shown in FIG. 4B, the paging message includes a paging identifier P_ID, which includes the identifier UE_ID of the first terminal device and the identifier MT_ID of the mobile terminal of the first access backhaul node.

[0156] Case A2, when the paging object of the network device is the mobile terminal of the first access backhaul node, the paging identifier can be used to indicate the mobile terminal of the first access backhaul node.

[0157] That is, when the paging object of the network device is the mobile terminal of the first access backhaul node, instead of the terminal device served by the first access backhaul node, the network device sends a paging message to the first access backhaul node, which only pages the mobile terminal of the first access backhaul node.

[0158] The paging identifier can include an identifier, which is an identifier of the mobile terminal of the first access backhaul node.

[0159] For ease of illustration, the paging object of the network device is taken as the first terminal device below.

[0160] In the implementation process, after the first access backhaul node receives a paging message from the network device, the first access backhaul node can determine the paging object of the network device according to the paging identifier included in the paging message, which is introduced below.

[0161] Case B1, the paging identifier includes an identifier, that is, the paging identifier is calculated according to the identifier of the mobile terminal of the first access backhaul node and the identifier of the first terminal device.

[0162] If the first access backhaul node detects the paging identifier from the first identifier list, the first access backhaul node can determine that the terminal device served by the first access backhaul node is paged by the network device. If the first access backhaul node detects the identifier of the first terminal device from the paging identifier, the first access backhaul node can determine that the first terminal device is paged by the network device, and the first terminal device is the terminal device served by the first access backhaul node.

[0163] The first identifier list can include at least one identifier, which can be calculated according to the identifier of the mobile terminal of the first access backhaul node and the identifier of at least one terminal device served by the first access backhaul node.

[0164] It can be understood that the calculation rule for calculating at least one identifier in the first identifier list according to the identifier of the mobile terminal of the first access backhaul node and the identifier of at least one terminal device served by the first access backhaul node can be pre-configured, or can be defined by a standard, or can be negotiated in advance by the network device, the first access backhaul node and the terminal device served by the first access backhaul node, and the embodiments of the present application do not limit this.

[0165] For example, MT_ID is the identity of the mobile terminal of the first access backhaul node. UE_ID1, UE_ID2 and UE_ID3 are the identities of three terminal devices (e.g., called terminal device a, terminal device b and terminal device c) served by the first access backhaul node, respectively. The first identity list includes P_ID1, P_ID2 and P_ID3, where P_ID1 = MT_ID + UE_ID1, P_ID2 = MT_ID + UE_ID2, and P_ID3 = MT_ID + UE_ID3. The paging message includes the paging identity P_ID1. When the first access backhaul node detects P_ID1 from the first identity list, the first access backhaul node can determine that a terminal device served by the first access backhaul node is paged by the network device. Further, when the first access backhaul node obtains UE_ID1 from P_ID1, the first access backhaul node can determine that terminal device a served by the first access backhaul node is paged by the network device.

[0166] That is, the paging identity is an identity in the first identity list, and the paging object of the network device is at least one terminal device served by the first access backhaul node.

[0167] Case B2, the paging identity includes two identities, i.e., the paging identity includes the identity of the mobile terminal of the first access backhaul node and the identity of the first terminal device.

[0168] If the first access backhaul node detects the identity of the first terminal device from the second identity list, the first access backhaul node can determine that the first terminal device is paged by the network device, and the first terminal device is a terminal device served by the first access backhaul node.

[0169] The second identity list includes at least one identity, which is the identity of at least one terminal device served by the first access backhaul node.

[0170] For example, MT_ID is the identity of the mobile terminal of the first access backhaul node. UE_ID1, UE_ID2 and UE_ID3 are the identities of three terminal devices (e.g., called terminal device a, terminal device b and terminal device c) served by the first access backhaul node, respectively. The second identity list includes UE_ID1, UE_ID2 and UE_ID3. The paging message includes the paging identity P_ID1, which includes MT_ID and UE_ID1. When the first access backhaul node detects UE_ID1 from the second identity list, the first access backhaul node can determine that terminal device a served by the first access backhaul node is paged by the network device.

[0171] That is, the first terminal device whose identity is included in the paging identity is the identity in the second identity list, and the paging object of the network device is at least one terminal device served by the first access backhaul node.

[0172] In a possible implementation, the paging message can further include a short message. The short message is a downlink control information (DCI) that can be detected by a physical layer (L1 layer, i.e., a physical (PHY) layer) through a physical radio network temporary identifier (P-RNTI), and the short message can be used to indicate whether to update a system message. For example, when the first bit in the short message is 1, the short message indicates to update the system message; when the first bit in the short message is 0, the short message indicates not to update the system message.

[0173] The short message can include first information or second information. The first information can be used to indicate that at least one terminal device served by the first access backhaul node is paged by the network device, and the second information can be used to indicate that at least one terminal device served by the first access backhaul node is not paged by the network device. The name of the first information and the second information is not limited in the embodiments of the present application.

[0174] That is, after the first access backhaul node receives a paging message from the network device, the first access backhaul node can directly detect, from a short message included in the paging message, whether at least one terminal device served by the first access backhaul node is paged by the network device. Since the first access backhaul node does not need to compare the paging identity with the identity of at least one terminal device served by the first access backhaul node to determine whether at least one terminal device served by the first access backhaul node is paged by the network device, for example, as in the above case B1, the first access backhaul node compares the paging identity with at least one identity in the first identity list, or as in the above case B2, the first access backhaul node compares the identity of the first terminal device included in the paging identity with at least one identity in the second identity list, the detection efficiency is improved.

[0175] Optionally, in order to further improve the detection efficiency, in the paging message, the short message can be located before the paging identifier. That is, if the first access backhaul node detects from the short message included in the paging message that at least one terminal device served by the first access backhaul node is paged by the network device, it is necessary to continue to detect the paging identifier included in the paging message to determine which specific terminal device served by the first access backhaul node is paged by the network device; if the first access backhaul node does not detect from the short message included in the paging message that at least one terminal device served by the first access backhaul node is paged by the network device, it is not necessary to continue to detect the paging identifier included in the paging message.

[0176] Optionally, in the short message, the first information or the second information can be located in at least one of the 5th bit to the 8th bit (i.e., the 5th bit, the 6th bit, the 7th bit and the 8th bit). For example, the first information or the second information can be located in the 5th bit in the short message, or the first information or the second information can be located in the 6th bit and the 7th bit in the short message. The embodiments of the present application do not limit this.

[0177] For example, FIG. 4C is a schematic diagram of another paging message provided by an embodiment of the present application. As shown in FIG. 4C, the paging message includes a short message and a paging identifier, and the short message is located before the paging identifier.

[0178] In a possible implementation, the first access backhaul node can receive (or detect, or monitor) the paging message from the network device at a first paging occasion (PO). That is, the first paging occasion can be used for the first access backhaul node to receive (or detect, or monitor) the paging message from the network device. That is, the first paging occasion can be understood as a set of reception occasions (or detection occasions, or paging monitoring occasions (PMO)) of the physical downlink control channel (PDCCH) used for indicating the paging message.

[0179] The first paging occasion can include one or more slots (or subframes, or orthogonal frequency division multiplexing (OFDM) symbols).

[0180] The first paging occasion can be one of the paging occasions in the first paging frame, and the first paging frame can be one of the paging frames in a paging cycle (e.g., a discontinuous reception (DRX) cycle, an extended DRX (eDRX) cycle, or the like) of the mobile terminal of the first access backhaul node. For example, FIG. 4D is a schematic diagram of a first paging frame and a first paging occasion provided by an embodiment of the present application. As shown in FIG. 4D, one paging cycle T includes N paging frames, one paging frame includes N s paging occasions, N and N s are positive integers, the first paging frame can be one of the N paging frames in one paging cycle T, and the first paging occasion can be one of the N s paging occasions in the first paging frame.

[0181] Specifically, taking the DRX cycle as an example for the paging cycle of the mobile terminal of the first access backhaul node, the first access backhaul node can determine the first paging frame from the paging frames included in one DRX cycle of the mobile terminal of the first access backhaul node based on the identifier of the mobile terminal of the first access backhaul node, and determine the first paging occasion from the paging occasions included in the first paging frame.

[0182] The first paging frame can satisfy the following relationship: P1 = (T div N)*(MT_ID mod N)

[0183] The first paging occasion can satisfy the following relationship: P2 = (floor(MT_ID / N)) mod N s

[0184] P1 is the identifier of the first paging frame, T is the duration of one DRX cycle of the mobile terminal of the first access backhaul node, MT_ID is the identifier of the mobile terminal of the first access backhaul node, N is the number of paging frames included in one DRX cycle of the mobile terminal of the first access backhaul node, P2 is the identifier of the first paging occasion, N s is the number of paging occasions included in one paging frame, div is the integer division operator, mod is the modulo operator, and floor is the floor operator.

[0185] S302, the first access backhaul node sends a paging message to the first terminal device, and correspondingly, the first terminal device receives the paging message from the first access backhaul node.

[0186] In the embodiments of the present application, after the first access backhaul node receives the paging message from the network device, if the first access backhaul node determines, according to the paging identifier included in the paging message, that the paging object of the network device is the first terminal device and the first terminal device is a terminal device served by the first access backhaul node, the first access backhaul node can send the paging message to the first terminal device.

[0187] In a possible implementation, if the first access backhaul node determines that the distance between the location of the mobile terminal of the first access backhaul node and the reference location is greater than the first distance threshold, the first access backhaul node can perform tracking area update, first identifier list update or second identifier list update. The reference location is a preset geographical location in the network coverage area, which can be set as a cell center point or a beam center point. The first distance threshold can be preconfigured, or can be defined by a standard, or can be agreed upon by the network device, the first access backhaul node and the terminal device served by the first access backhaul node in advance, and the embodiments of the present application do not limit this.

[0188] It can be understood that if the distance between the location of the mobile terminal of the first access backhaul node and the reference location is greater than the first distance threshold, it indicates that the location of the mobile terminal of the first access backhaul node has changed and moved to a tracking area outside the registered tracking area list, and therefore the first access backhaul node needs to perform tracking area update. Further, if the location of the mobile terminal of the first access backhaul node changes, at least one terminal device served by the first access backhaul node will also change, and therefore the first access backhaul node needs to update the identifier of at least one terminal device served by the first access backhaul node, that is, at least one identifier in the first identifier list or the second identifier list.

[0189] After the first terminal device receives the paging message from the first access backhaul node, the first access backhaul node can determine the paging object of the network device according to the paging identifier included in the paging message. For example, if the first terminal device detects the identifier of the first terminal device from the paging identifier, the first terminal device can determine that the first terminal device is paged by the network device.

[0190] In a possible implementation, if the first terminal device does not detect the identifier of the mobile terminal of the first access backhaul node from the third identifier list, the first terminal device can perform tracking area update or third identifier list update. At least one identifier in the third identifier list is an identifier of at least one access backhaul node serving the first terminal device.

[0191] It can be understood that if the first terminal device does not detect the identity of the mobile terminal of the first access backhaul node from the third identity list, it indicates that the location of the first terminal device changes and moves to a tracking area outside the registered tracking area list, and therefore the first terminal device needs to perform tracking area update. Further, if the location of the first terminal device changes, at least one access backhaul node serving the first terminal device will also change accordingly, and therefore the first terminal device needs to update the identity of at least one access backhaul node serving the first terminal device, i.e. at least one identity in the third identity list.

[0192] It can be understood that the above-mentioned embodiments of the present application can be implemented separately or in combination with each other, and the embodiments of the present application are not limited.

[0193] Based on the same technical concept as the above method embodiments, the embodiments of the present application provide a corresponding communication device, which can be used to perform the functions of the related steps in the above method embodiments. The functions can be implemented by hardware, software, or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. The communication device can be an access network device or a module (such as a circuit or a chip) in the access network device, or a logic node, a logic module or software that can implement all or part of the functions of the access network device; or the communication device can be a terminal device, or a module (such as a circuit or a chip) in the terminal device, or a logic node, a logic module or software that can implement all or part of the functions of the terminal device.

[0194] In one possible implementation, the structure of the communication device provided by the embodiments of the present application is shown in FIG. 5, which includes an interface unit 501 and a processing unit 502. The functions of each unit in the communication device 500 are introduced as follows.

[0195] The interface unit 501 is used for inputting and / or outputting information. The input information can be replaced by received information, and the output information can be replaced by transmitted information. When outputting information, the interface unit 501 can output information to other devices outside the communication device 500, or output information to other units in the communication device 500. In some ways, the interface unit 501 can be implemented through at least one of a physical interface, a communication module, a communication interface, and an input / output interface. In other ways, the interface unit 501 can be implemented through an interface circuit, such as a mobile communication module. The mobile communication module can include one or more of at least one antenna, at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc.

[0196] The processing unit 502 can be configured to support the communication apparatus 500 to perform the processing actions in the above method embodiments. The processing unit 502 can be implemented by one or more processors. For example, the processor can be a central processing unit (CPU), and can also be other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general purpose processor can be a microprocessor or any conventional processor.

[0197] In an embodiment, the communication apparatus 500 is applied to the first access backhaul node in the embodiments of the present application shown in FIG. 3. The specific functions of the interface unit 501 in this embodiment are introduced as follows.

[0198] The interface unit 501 is configured to: receive a paging message from a network device, the paging message comprising a paging identifier, the paging identifier being used to indicate a mobile terminal of a first terminal device and the first access backhaul node, the first terminal device being a terminal device served by the first access backhaul node; and send the paging message to the first terminal device.

[0199] Optionally, the paging identifier is calculated according to an identifier of the mobile terminal and an identifier of the first terminal device.

[0200] Optionally, the paging identifier satisfies the following relationship: P_ID = MT_ID + UE_ID

[0201] wherein P_ID is the paging identifier, MT_ID is the identifier of the mobile terminal, and UE_ID is the identifier of the first terminal device.

[0202] Optionally, the paging identifier is an identifier in a first identifier list, and at least one identifier in the first identifier list is calculated according to an identifier of the mobile terminal and an identifier of at least one terminal device served by the first access backhaul node.

[0203] Optionally, the paging identifier comprises the identifier of the mobile terminal and the identifier of the first terminal device.

[0204] Optionally, the identity of the first terminal device is an identity in a second identity list, and at least one identity in the second identity list is an identity of at least one terminal device served by the first access backhaul node.

[0205] Optionally, the paging message further comprises a short message, and the short message comprises first information, where the first information is used to indicate that at least one terminal device served by the first access backhaul node is paged by the network device.

[0206] Optionally, in the paging message, the short message is located before the paging identity.

[0207] Optionally, in the short message, the first information is located in at least one of the 5th bit to the 8th bit.

[0208] Optionally, the processing unit 502 is configured to: in a case where a distance between the first access backhaul node and a reference position is greater than a first distance threshold, perform tracking area updating, first identity list updating, or second identity list updating, at least one identity in the first identity list is calculated according to an identity of the mobile terminal and identities of at least one terminal device served by the first access backhaul node, and at least one identity in the second identity list is an identity of at least one terminal device served by the first access backhaul node.

[0209] Optionally, the processing unit 502 is configured to: according to the identity of the mobile terminal, determine a first paging frame from paging frames included in one discontinuous reception cycle of the mobile terminal, and determine a first paging occasion from paging occasions included in the first paging frame, where the first paging occasion is used for the first access backhaul node to receive the paging message from the network device.

[0210] Optionally, the first access backhaul node comprises an IAB node and / or a WAB node.

[0211] In an implementation, when the communication apparatus 500 is an access network device or a communication module in an access network device, the function of the processing unit 502 can be implemented by one or more processors. For example, the processor can include a modem chip, or a system on chip (SoC) chip or a SIP chip including a modem core. The function of the interface unit 501 can be implemented by a transceiver circuit.

[0212] In an embodiment, when the communication apparatus 500 is a circuit or a chip responsible for communication functions in an access network device, such as a modem chip or a system on chip (SoC) chip or a SIP chip containing a modem core, the function of the processing unit 502 can be implemented by the circuitry including one or more processors or processor cores in the chip. The function of the interface unit 501 can be implemented by the interface circuit or the data transceiver circuit on the chip.

[0213] In another embodiment, the communication apparatus 500 is applied to the first terminal device in the embodiment of the application shown in FIG. 3. The specific functions of the interface unit 501 in this embodiment are introduced as follows.

[0214] The interface unit 501 is configured to receive a paging message from a first access backhaul node, wherein the paging message comprises a paging identifier, and the paging identifier is used to indicate a mobile terminal of the first terminal device and the first access backhaul node.

[0215] In a possible implementation, the paging identifier is calculated according to an identifier of the mobile terminal and an identifier of the first terminal device.

[0216] In a possible implementation, the paging identifier satisfies the following relationship: P_ID = MT_ID + UE_ID

[0217] wherein P_ID is the paging identifier, MT_ID is the identifier of the mobile terminal, and UE_ID is the identifier of the first terminal device.

[0218] In a possible implementation, the paging identifier comprises the identifier of the mobile terminal and the identifier of the first terminal device.

[0219] In a possible implementation, the processing unit 502 is configured to perform tracking area update or third identifier list update in a case where the identifier of the mobile terminal is not detected from the third identifier list, wherein at least one identifier in the third identifier list is an identifier of a mobile terminal of at least one access backhaul node serving the first terminal device.

[0220] In a possible implementation, the first access backhaul node comprises an IAB node and / or a WAB node.

[0221] In an embodiment, when the communication apparatus 500 is a terminal device or a communication module in a terminal device, the function of the processing unit 502 can be implemented by one or more processors. For example, the processor can comprise a modem chip, or a system on chip (SoC) chip or a SIP chip containing a modem core. The function of the interface unit 501 can be implemented by a transceiver circuit.

[0222] In an implementation, when the communication apparatus 500 is a circuit or chip responsible for communication function in a terminal device, such as a modem chip or a system on chip (SoC) chip containing a modem core or a SIP chip, the function of the processing unit 502 can be implemented by the circuit system containing one or more processors or processor cores in the above chip. The function of the interface unit 501 can be implemented by the interface circuit or data transceiver circuit on the above chip.

[0223] The more detailed description of the processing unit 502 and the interface unit 501 can be directly obtained by referring to the related description in the method embodiment shown in FIG. 3, which will not be repeated here.

[0224] It should be noted that the division of the modules in the above embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, there can be another division manner. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or can be physically separated, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0225] When the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0226] In a possible implementation, the structure of the communication apparatus provided by the embodiments of the present application is shown in FIG. 6. The communication apparatus 600 includes a processor 602. Optionally, the communication apparatus 600 further includes an interface circuit 601 and a memory 603. The interface circuit 601, the processor 602 and the memory 603 are coupled with each other.

[0227] Optionally, the interface circuit 601, the processor 602 and the memory 603 are coupled by a bus 604. The bus 604 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in FIG. 6, but it does not mean that there is only one bus or only one type of bus.

[0228] The interface circuit 601 is configured to input and / or output information. The input information can be replaced by received information, and the output information can be replaced by transmitted information. When outputting the information, the interface circuit 601 can output the information to other devices outside the communication apparatus 600, or output the information to other units in the communication apparatus 600. For example, the interface circuit 601 can be implemented by at least one of a physical interface, a communication module, a communication interface, an input / output interface, and a mobile communication module. The mobile communication module can include one or more of at least one antenna, at least one filter, a switch, a power amplifier, an LNA, etc.

[0229] The processor 602 can be configured to support the communication apparatus 600 to perform the processing actions in the above method embodiments. When the communication apparatus 600 is configured to implement the above method embodiments, the processor 602 can also be configured to implement the functions of the above processing unit 502. The processor 602 can be a CPU, and can also be other general-purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor can be a microprocessor, or any conventional processor.

[0230] In an embodiment, the communication apparatus 600 is applied to the first access backhaul node in the embodiments of the present application shown in FIG. 3. The specific functions of the processor 602 in this embodiment are described below.

[0231] The processor 602 is configured to: receive, by the interface circuit 601, a paging message from a network device, the paging message including a paging identifier, the paging identifier being used to indicate a first terminal device and a mobile terminal of the first access backhaul node, the first terminal device being a terminal device served by the first access backhaul node; and send the paging message to the first terminal device.

[0232] In another embodiment, the communication apparatus 600 is applied to the first terminal device in the embodiments of the present application shown in FIG. 3. The specific functions of the processor 602 in this embodiment are described below.

[0233] The processor 602 is configured to receive, through the interface circuit 601, a paging message from the first access backhaul node, the paging message comprising a paging identifier, the paging identifier being used to indicate the first terminal device and a mobile terminal of the first access backhaul node.

[0234] The specific functions of the processor 602 can refer to the descriptions in the communication method provided by the embodiments of the present application and the examples, and the specific function descriptions of the communication device 500 in the embodiments of the present application shown in FIG. 5, which will not be repeated here.

[0235] The memory 603 is configured to store program instructions and / or data, etc. Specifically, the program instructions can include program codes, which include computer operation instructions. The memory 603 can include RAM, and can also include non-volatile memory, such as at least one disk memory. The processor 602 executes the program instructions stored in the memory 603, and uses the data stored in the memory 603, to realize the above functions, thereby realizing the communication method provided by the embodiments of the present application. The memory 603 can be integrated with the processor 602, or can be a memory outside the communication device.

[0236] It can be understood that the memory 603 in FIG. 6 of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. The non-volatile memory can be ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically EPROM (EEPROM), or flash memory. The volatile memory can be RAM, which is used as an external cache. By way of example but not limitation, many forms of RAM can be used, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include but not limited to these and any other suitable types of memory.

[0237] Based on the above embodiments, the embodiments of the present application further provide a computer program product including computer executable instructions, when the computer program product is executed, the method provided by the above embodiments is executed.

[0238] Based on the above embodiments, the embodiments of the present application further provide a computer readable storage medium, the computer readable storage medium stores a computer program, when the computer program is executed by a computer, the computer executes the method provided by the above embodiments.

[0239] The storage medium can be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Computer-readable media can further include, but are not limited to, bus- based memory cores, processor registers, and the like.

[0240] Based on the above embodiments, the embodiments of the present application further provide a chip for reading the computer program stored in the memory, and implementing the method provided by the above embodiments.

[0241] Based on the above embodiments, the embodiments of the present application provide a chip system, which includes a processor for supporting the computer device to implement the functions related to the devices in the above embodiments. In a possible design, the chip system further includes a memory for storing the necessary programs and data of the computer device. The chip system can be composed of a chip, or can include the chip and other discrete devices.

[0242] In each of the embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0243] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

[0244] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks or in conjunction with the flowchart blocks. These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks.

[0245] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks or in conjunction with the flowchart blocks. These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks.

[0246] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks or in conjunction with the flowchart blocks. These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks.

Claims

1. A communication method characterized by comprising: The application is applied to a first access backhaul node, and comprises: receiving a paging message from a network device, wherein the paging message comprises a paging identifier, and the paging identifier is used to indicate a first terminal device and a mobile terminal of the first access backhaul node, and the first terminal device is a terminal device served by the first access backhaul node; sending the paging message to the first terminal device.

2. The method of claim 1, wherein, The paging identifier is calculated according to an identifier of the mobile terminal and an identifier of the first terminal device.

3. The method of claim 2, wherein, The paging identifier satisfies the following relationship: P_ID = MT_ID + UE_ID wherein P_ID is the paging identifier, MT_ID is the identifier of the mobile terminal, and UE_ID is the identifier of the first terminal device.

4. The method according to claim 2 or 3, characterized in that, The paging identifier is an identifier in a first identifier list, and at least one identifier in the first identifier list is calculated according to the identifier of the mobile terminal and identifiers of at least one terminal device served by the first access backhaul node.

5. The method of claim 1, wherein, The paging identifier comprises the identifier of the mobile terminal and the identifier of the first terminal device.

6. The method of claim 5, wherein, The identifier of the first terminal device is an identifier in a second identifier list, and at least one identifier in the second identifier list is an identifier of at least one terminal device served by the first access backhaul node.

7. The method according to any of claims 1 to 6, characterized in that, The paging message further comprises a short message, and the short message comprises first information, wherein the first information is used to indicate that at least one terminal device served by the first access backhaul node is paged by the network device.

8. The method of claim 7, wherein, In the paging message, the short message is located before the paging identifier.

9. The method according to claim 7 or 8, characterized in that, In the short message, the first information is located in at least one bit of the 5th bit to the 8th bit.

10. The method according to any one of claims 1 to 9, characterized in that, The method further comprises: in a case where a distance between the location of the mobile terminal and a reference location is greater than a first distance threshold, performing tracking area update, first identifier list update or second identifier list update, at least one identifier in the first identifier list is calculated according to the identifier of the mobile terminal and identifiers of at least one terminal device served by the first access backhaul node, and at least one identifier in the second identifier list is an identifier of at least one terminal device served by the first access backhaul node.

11. The method according to any one of claims 1 to 10, characterized in that, The method further comprises: determining a first paging frame from paging frames included in a discontinuous reception cycle of the mobile terminal according to the identifier of the mobile terminal, and determining a first paging occasion from paging occasions included in the first paging frame, wherein the first paging occasion is used for the first access backhaul node to receive the paging message from the network device.

12. The method of any one of claims 1-11, wherein, The first access backhaul node comprises an integrated access backhaul (IAB) node and / or a wireless access backhaul (WAB) node.

13. A method of communication, comprising: The application is applied to a first terminal device, and comprises: receiving a paging message from a first access backhaul node, wherein the paging message comprises a paging identifier, and the paging identifier is used to indicate a first terminal device and a mobile terminal of the first access backhaul node.

14. The method of claim 13, wherein, The paging identifier is calculated according to an identifier of the mobile terminal and an identifier of the first terminal device.

15. The method of claim 14, wherein, The paging identity satisfies the following relationship: P_ID = MT_ID + UE_ID Wherein, P_ID is the paging identity, MT_ID is the identity of the mobile terminal, and UE_ID is the identity of the first terminal device.

16. The method of claim 13, wherein, The paging identity comprises the identity of the mobile terminal and the identity of the first terminal device.

17. The method of any of claims 13-16, wherein, The method further comprises: In the case that the identity of the mobile terminal is not detected from the third identity list, performing tracking area update or the third identity list update, at least one identity in the third identity list being the identity of the mobile terminal served by at least one access backhaul node of the first terminal device.

18. The method of any of claims 13-17, wherein, The first access backhaul node comprises an IAB node and / or a WAB node.

19. A communications device, characterized by The communication device comprises a module for performing the method according to any one of claims 1-12, or a module for performing the method according to any one of claims 13-18.

20. A communications device, characterized by The communication device comprises a processor for performing the method according to any one of claims 1-12, or performing the method according to any one of claims 13-18.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium is used to store a computer program, when the computer program is run on a computer, so that the method according to any one of claims 1-12 is executed, or so that the method according to any one of claims 13-18 is executed.

22. A computer program product, characterised in that, The computer program product comprises a computer program, when the computer program is run on a computer, so that the method according to any one of claims 1-12 is executed, or so that the method according to any one of claims 13-18 is executed.

23. A communication system, characterized by The communication system comprises a first access backhaul node and a first terminal device, wherein the first access backhaul node is configured to implement the method according to any one of claims 1-12, and the first terminal device is configured to implement the method according to any one of claims 13-18.

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