Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first network element of a core network sending a first message to a first access network device, wherein the first message is used for triggering the first access network device to send a first notification message or a first paging message; the first notification message is used for notifying a first terminal device of moving from the current position to a position having a better channel condition so as to receive a paging message; and the first paging message is an enhanced paging message, or the first paging message is a paging message sent when a second access network device fails to page the first terminal device.

Description

Wireless communication method and communication device Technical Field

[0001] The present application relates to the field of communication technology, and more particularly, to a wireless communication method and a communication device. Background Art

[0002] When a terminal device is in an environment with poor signal quality, how to improve the paging success rate of the terminal device is a problem that needs to be solved.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method and a communication device. The following introduces various aspects involved in the present application.

[0005] In a first aspect, a wireless communication method is provided, including: a first network element of a core network sends a first message to a first access network device, wherein the first message is used to trigger the first access network device to send a first notification message or a first paging message; wherein the first notification message is used to notify the first terminal device to move from a current position to a position with better channel conditions to receive a paging message; wherein the first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0006] According to a second aspect, a wireless communication method is provided, comprising: a first access network device sends a first notification message or a first paging message to a first terminal device; wherein the first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; wherein the first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0007] According to a third aspect, a wireless communication method is provided, comprising: a first terminal device receives a first notification message or a first paging message sent by a first access network device; wherein the first notification message is used to notify the first terminal device to move from a current position to a position with better channel conditions to receive a paging message; wherein the first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0008] In a fourth aspect, a wireless communication method is provided, comprising: a second network element of a core network sends third information to a first network element or a third network element, wherein the third information is used to trigger transmission of an enhanced paging message.

[0009] In a fifth aspect, a wireless communication method is provided, including: a third network element in a core network sends first downlink data to a first access network device, wherein the first downlink data includes third information, and the third information is used to trigger the first access network device to send an enhanced paging message.

[0010] In the sixth aspect, a communication device is provided, which is the first network element of the core network, and the communication device includes: a first communication module, used to send a first message to a first access network device, the first message is used to trigger the first access network device to send a first notification message or a first paging message; wherein, the first notification message is used to notify the first terminal device to move from the current position to a position with better channel conditions to receive a paging message; wherein, the first paging message is an enhanced paging message, or, the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0011] In the seventh aspect, a communication device is provided, which is a first access network device, and the communication device includes: a first communication module, used to send a first notification message or a first paging message to a first terminal device; wherein the first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; wherein the first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0012] In the eighth aspect, a communication device is provided, which is a first terminal device, and the communication device includes: a first communication module, used to receive a first notification message or a first paging message sent by a first access network device; wherein the first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; wherein the first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0013] In the ninth aspect, a communication device is provided, which is a second network element of the core network, and the communication device includes: a first communication module, used to send third information to the first network element or the third network element, and the third information is used to trigger the transmission of an enhanced paging message.

[0014] In the tenth aspect, a communication device is provided, which is a third network element in the core network, and the communication device includes: a first communication module, used to send first downlink data to a first access network device, the first downlink data contains third information, and the third information is used to trigger the first access network device to send an enhanced paging message.

[0015] In the eleventh aspect, a communication device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes the method described in any one of the first to fifth aspects.

[0016] In a twelfth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is used to execute the method described in any one of the first to fifth aspects.

[0017] In the thirteenth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to execute the method described in any one of the first to fifth aspects.

[0018] In the fourteenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement the method described in any one of the first to fifth aspects.

[0019] The embodiment of the present application introduces a first notification message or a first paging message, which helps to improve the paging success rate of the paging message. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1A shows a wireless communication system according to an embodiment of the present application.

[0021] FIG1B is a wireless communication system according to another embodiment of the present application.

[0022] FIG1C shows a wireless communication system according to another embodiment of the present application.

[0023] FIG2A is a diagram illustrating an example of a registration state transition of a terminal device.

[0024] FIG2B is a diagram illustrating an example of a registration state transition on the network side.

[0025] FIG3A is a diagram illustrating an example of connection management state transition of a terminal device.

[0026] FIG3B is a diagram illustrating an example of connection management state transition on the network side.

[0027] FIG4 is a flow chart of a wireless communication method provided in one embodiment of the present application.

[0028] FIG5 is a flow chart of a wireless communication method provided in another embodiment of the present application.

[0029] FIG6 is an example diagram of a communication scenario to which an embodiment of the present application can be applied.

[0030] FIG7 is a flowchart of a wireless communication method provided in another embodiment of the present application.

[0031] FIG8 is a flowchart of a wireless communication method provided in yet another embodiment of the present application.

[0032] FIG9 is a flowchart of a wireless communication method provided in another embodiment of the present application.

[0033] FIG10 is a flowchart of a wireless communication method provided in another embodiment of the present application.

[0034] FIG11 is a flow chart of a wireless communication method provided in another embodiment of the present application.

[0035] FIG12 is a schematic structural diagram of a communication device provided in one embodiment of the present application.

[0036] FIG13 is a schematic structural diagram of a communication device provided in another embodiment of the present application.

[0037] FIG14 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application.

[0038] FIG15 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application.

[0039] FIG16 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application.

[0040] FIG17 is a schematic structural diagram of a device for communication according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] Communication system architecture

[0042] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, advanced long term evolution (LTE-A) system, new radio (NR) system, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, non-terrestrial network (NTN) system, universal mobile telecommunication system (UMTS), wireless local area networks (WLAN), wireless fidelity (WLAN), etc. fidelity, WiFi), fifth-generation communication (5G) systems or other communication systems, such as future communication systems, such as sixth-generation mobile communication systems, and satellite communication systems.

[0043] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, and the embodiments of the present application can also be applied to these communication systems.

[0044] The communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0045] The communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, where the authorized spectrum can also be considered as a dedicated spectrum.

[0046] The embodiments of the present application can be applied to NTN systems as well as terrestrial networks (TN) systems. As an example and not a limitation, NTN systems include NR-based NTN systems and IoT-based NTN systems.

[0047] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, where the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0048] In an embodiment of the present application, the terminal device may be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a next-generation communication system such as a terminal device in an NR network, or a terminal device in a future-evolved public land mobile network (PLMN) network, etc.

[0049] In an embodiment of the present application, a terminal device may be a device that provides voice and / or data connectivity to a user and can be used to connect people, objects, and machines, such as a handheld device with wireless connection capabilities, an in-vehicle device, etc. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, 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, etc. Optionally, the terminal device can be used to act as a base station. For example, the terminal device can act as a scheduling entity that provides sidelink signals between terminal devices in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. Cellular phones and smart home devices communicate with each other without relaying the communication signal through a base station.

[0050] In an embodiment of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (for example, on an airplane, balloon, and satellite, etc.).

[0051] In the embodiments of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc. The terminal device involved in the embodiments of the present application may also be referred to as a terminal, user equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE, a wireless communication device, a UE agent, or a UE device, etc. The terminal device may also be fixed or mobile.

[0052] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0053] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station may also refer to a communication module, modem or chip provided in the aforementioned device or apparatus. The base station may also be a mobile switching center and a device-to-device D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication device that performs the base station function, a network side device in a 6G network, a device that performs the base station function in a future communication system, etc. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.

[0054] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0055] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0056] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0057] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. In some embodiments of the present application, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. In some embodiments of the present application, the network device may also be a base station set up in a location such as land or water.

[0058] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0059] For example, Figure 1A is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. As shown in Figure 1A, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or also referred to as a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located within the coverage area.

[0060] Figure 1A exemplarily shows a network device and two terminal devices. In some embodiments of the present application, the communication system 100 may include multiple network devices and each network device may include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0061] For example, FIG1B is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application. Referring to FIG1B , a terminal device 1101 and a satellite 1102 are included, and wireless communication can be performed between the terminal device 1101 and the satellite 1102. The network formed between the terminal device 1101 and the satellite 1102 can also be referred to as an NTN. In the architecture of the communication system shown in FIG1B , the satellite 1102 can have the function of a base station, and the terminal device 1101 and the satellite 1102 can communicate directly. In the system architecture, the satellite 1102 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1102, and each network device 1102 may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0062] For example, FIG1C is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application. Referring to FIG1C , it includes a terminal device 1201, a satellite 1202, and a base station 1203. Wireless communication can be performed between the terminal device 1201 and the satellite 1202, and communication can be performed between the satellite 1202 and the base station 1203. The network formed between the terminal device 1201, the satellite 1202, and the base station 1203 can also be referred to as an NTN. In the architecture of the communication system shown in FIG1C , the satellite 1202 may not have the function of a base station, and the communication between the terminal device 1201 and the base station 1203 needs to be transferred through the satellite 1202. In this system architecture, the base station 1203 can be referred to as a network device. In some embodiments of the present application, a plurality of network devices 1203 may be included in the communication system, and each network device 1203 may include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0063] It should be noted that Figures 1A-1C are only examples of the system to which this application is applicable. Of course, the method shown in the embodiment of this application can also be applied to other systems, such as 5G communication systems, LTE communication systems, etc., and the embodiment of this application does not make specific limitations on this.

[0064] In some embodiments of the present application, the wireless communication system shown in Figures 1A-1C may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but the embodiments of the present application are not limited to this.

[0065] It should be understood that in the embodiments of the present application, a device having a communication function in a network / system may be referred to as a communication device. Taking the communication system 100 shown in FIG1A as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function. The network device 110 and the terminal device 120 may be the specific devices described above and will not be described in detail here. The communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in the embodiments of the present application.

[0066] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0067] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0068] The “configuration” in the embodiment of the present application may include configuration through at least one of system messages, radio resource control (RRC) signaling and media access control element (MAC CE).

[0069] In some embodiments of the present application, "predefined" or "preset" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device or a network device). This application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0070] In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0071] Registration Management

[0072] Figures 2A and 2B show the registration status on the terminal device and AMF. As can be seen from Figures 2A and 2B, there are two registration states, namely the RM-DEREGISTERED state and the RM-REGISTERED state. When in the deregistered state, the terminal device is not registered on the network, and there is no valid location and routing information in the terminal device context saved by the AMF. Therefore, the terminal device is unreachable to the AMF. However, some terminal device contexts related to authentication will be stored in the terminal device and AMF to avoid executing the authentication process for each registration process. When in the registered state, the terminal device is registered on the network, and the terminal device can perform normal business communications through the network. At this time, the terminal device mobility management context will be saved in the AMF.

[0073] Connection Management

[0074] Connection management is used to establish and release the N1 non-access stratum (NAS) signaling connection between the terminal device and the AMF. The N1 NAS signaling connection is used to enable signaling interaction between the terminal device and the core network, including the connection between the terminal device and the access network equipment, and the N2 connection between the access network equipment and the AMF for the terminal device.

[0075] The connection states between the terminal device and the AMF include: CM-IDLE state and CM-CONNECTED state. When the terminal device is in the CM-IDLE state, there is no N1 connection, AN signaling connection, N2 connection, or N3 connection corresponding to the terminal device. When the terminal device is in the CM-IDLE state and the RM-REGISTERED state at the same time, the terminal device needs to initiate a service request process to respond to the paging (but not including the terminal device being in the mobile initiated connection only (MICO) mode). Alternatively, when the terminal device has uplink signaling or data to send, a service request process can be initiated. When the terminal device on the AMF side is in the RM-REGISTERED state, the information required to initiate communication with the terminal device will be stored in the AMF, and the AMF can obtain the above information through the 5G-globally unique temporary UE identity (GUTI).

[0076] The terminal device will provide AN parameters such as the 5G-S-TMSI during the AN signaling connection and establishment process. As shown in Figure 3A, each time an AN signaling connection is established, the terminal device should enter the CM-CONNECTED state. Furthermore, the initial NAS signaling (registration request, service request, or deregistration request) will initiate the transition from the CM-IDLE state to the CM-CONNECTED state.

[0077] When the terminal device status recorded in the AMF is CM-IDLE and RM-REGISTRATION, if the AMF has signaling or data to send to the terminal device, it needs to initiate paging to the terminal device and obtain a response to execute the service request process initiated by the network side. As shown in Figure 3B, whenever an N2 connection is established for a terminal device, the status of this terminal device in the AMF will enter the CM-CONNECTED state. The receipt of the initial N2 message will initiate the transition of the AMF CM-IDLE state to the CM-CONNECTED state. When the terminal device is in the CM-IDLE state, it can enter the MICO mode to reduce energy consumption and signaling overhead.

[0078] When a terminal device is in the CM-CONNECTED state, an N1 NAS signaling connection exists between the terminal device and the AMF. This NAS signaling connection uses the RRC connection between the terminal device and the NG-RAN and the NGAP terminal device association between the AN and the AMF. When a terminal device is in the CM-CONNECTED state, the NGAP may not be bound to any transport network layer. After completing the NAS signaling process, the AMF can decide whether to release the NAS signaling connection with the terminal device.

[0079] When the terminal device is in the CM-CONNECTED state, for example, when the terminal device enters the CM-IDLE state after the AN signaling connection is released, or when the logical NGAP signaling connection and the N3 user plane connection of the terminal device enter the CM-IDLE state after the AN is released, the AMF may maintain the terminal device's connection state in CM-CONNECTED until the terminal device deregisters from the network.

[0080] In addition, a terminal device in the CM-CONNECTED state can also be in the RRC_INACTIVE state. At this time, the RAN will release the AN connection between the terminal device and the terminal device. When the terminal device is active in the area configured by the RAN, the N2 connection still exists. The reachability of the terminal device is managed by the RAN based on the auxiliary information provided by the network side. The terminal device paging is managed by the RAN. The terminal device listens for paging containing the network identifier (5G S-TMSI) and RAN identifier corresponding to the terminal device. When the terminal device leaves the area configured by the RAN, it needs to notify the RAN.

[0081] Accessibility of terminal devices

[0082] Reachability management is responsible for detecting whether the terminal device is reachable and providing the network with the terminal device location (i.e., access node) so that the information sent by the network can reach the terminal device. This process is accomplished by paging the terminal device and tracking the terminal device location. Terminal device location tracking includes terminal device registration area tracking (i.e., terminal device registration area update) and terminal device reachability tracking (i.e., terminal device periodic registration area update). The above functions can be located in 5GC (in the case of CM-IDLE state) or NG-RAN (in the case of CM-CONNECTED state). The terminal device and AMF negotiate the terminal device reachability characteristics of the CM-IDLE state during the registration process. The following three terminal device reachability categories are negotiated between the terminal device and AMF for the CM-IDLE state:

[0083] 1. When the mobile device is in CM-IDLE state, the terminal device reachability is allowed to send data to the terminal device;

[0084] 1.1 The network understands the location of the terminal device at the granularity of the tracking area list;

[0085] 1.2 Paging procedures apply to this category;

[0086] 1.3 Terminal Device Originated Data and Terminal Device Terminated Data in this category are applicable to the CM-CONNECTED and CM-IDLE states.

[0087] 2. Connection mode initiated only by the terminal device;

[0088] 2.1 Terminal device originated data in this category applies to CM-CONNECTED and CM-IDLE states;

[0089] 2.2 End-device termination of data is supported only when the end-device is in the CM-CONNECTED state.

[0090] 3. The terminal device cannot be reached due to unavailability period.

[0091] 3.1 Does not support terminal device originating data and terminal device terminating data;

[0092] 3.2 Paging process does not apply.

[0093] Whenever a terminal device in the RM-REGISTERED state enters the CM-IDLE state, it starts a periodic registration timer based on the periodic registration timer assigned by the AMF during the registration process. The terminal device needs to perform periodic registration after the periodic registration timer expires. If the terminal device moves out of the network coverage when the periodic registration timer expires, the terminal device should perform the registration process the next time it returns to the coverage area.

[0094] The AMF runs the Mobile Reachable Timer for the terminal device. Whenever the CM state of a terminal device in the RM-REGISTERED state changes to the CM-IDLE state, the timer is started with a value longer than the terminal device's periodic registration timer. If the RAN initiates a terminal device context release indicating that the terminal device is unreachable, and the AMF receives an elapsed time from the RAN, the AMF shall derive the Mobile Reachable Timer value based on the elapsed time received from the RAN and the normal Mobile Reachable Timer value. If the terminal device's CM state in the AMF transitions to the CM-CONNECTED state, the AMF stops the Mobile Reachable Timer. If the Mobile Reachable Timer expires, the AMF determines that the terminal device is unreachable. When the Mobile Reachable Timer expires, the AMF cannot determine whether the terminal device is only temporarily unreachable and therefore does not immediately deregister the terminal device. Only after the Mobile Reachable Timer expires will the AMF clear the Paging Processing Indicator bit and start the Implicit Deregistration Timer. If the terminal device changes to the CM-CONNECTED state before the timer expires, the AMF shall stop the Implicit Registration Timer and set the PPF bit. Otherwise, after the Implicit Registration Timer expires, the AMF initiates a private deregistration of the terminal device.

[0095] If the terminal device indicates the duration of the unavailable period, the AMF will consider the terminal device unreachable and will not trigger the paging process (e.g. clear PPF) until the terminal device registers for normal services again (e.g. set PPF). Once the event that caused the terminal device to be unavailable is completed or canceled in the terminal device, the terminal device will initiate the registration process to resume normal service.

[0096] If the CM state of the terminal device in the AMF is CM-IDLE, the AMF considers the terminal device in RM-REGISTERED state to be reachable via CN paging unless the terminal device applies MICO mode or the terminal device has indicated the unavailable period duration.

[0097] In the related technologies introduced above, when the terminal device is in the CM-IDLE state or the CM-CONNECTED with RRC_INACTIVE state, there is no connection between the terminal device and the access network device. At this time, if the network side has downlink data (MT data) or downlink signaling to be sent to the terminal device, the terminal device needs to be paged (paging). When the terminal device is in unfavorable wireless channel conditions, such as being placed in the user's pocket or other non-line-of-sight (NLOS) scenarios, the terminal device may not receive the paging message and will not establish a connection with the network. This will result in the downlink data or downlink signaling being unable to be sent to the target terminal device.

[0098] To improve the probability of successful paging of terminal devices, a robust notification and paging mechanism is proposed for specific terminal devices in a cell. This maximizes the probability of the terminal device being notified of a mobile terminated call when the SNR conditions are particularly poor and normal paging messages cannot be received. Specifically, the mechanism needs to solve the following problems:

[0099] First, under what conditions should the mechanism be triggered, and by which network elements? For example, when the paging terminal device fails, it can be triggered by the AMF, or by other network elements.

[0100] Secondly, the main scenarios for this mechanism are: for example, when MT paging fails, the terminal device can be notified to move to a location with better channel conditions to receive the paging message. Another example is when a terminal device connected to both a terrestrial network and a satellite network is unable to receive the paging message due to horizontal obstruction, the network can send a paging signal to the terminal device via satellite.

[0101] In response to one or more of the above problems, the embodiments of the present application are described in detail below.

[0102] Figure 4 is a flow chart of a wireless communication method provided by an embodiment of the present application. The method of Figure 4 is described from the perspective of the interaction between the first network element and the first access network device. The first network element may be a network element in the core network. The first network element may be used to perform mobility management on the terminal device. Exemplarily, the first network element may be an AMF or an MME. The first access network device may be an access network device deployed on the ground, or an access network device deployed on a satellite. Taking an access network device deployed on a satellite as an example, the first access network device may be an access network device in a transparent payload mode, or an access network device in a regenerative payload mode.

[0103] 4 , in step S410 , the first network element sends a first message to the first access network device. The function of the first message will be described in detail below with reference to the first and second embodiments.

[0104] Embodiment 1: The first message is used to trigger the first access network device to send a first notification message

[0105] In some implementations, the first notification message may also be referred to as a robust notification message, an alert message, or a robust alert message.

[0106] In some implementations, the first notification message may be used to indicate or notify the first terminal device (the first terminal device mentioned in the embodiment of the present application may be a terminal device in a CM-IDLE state or an RRC_INACTIVE state) that the channel condition is poor.

[0107] In some implementations, the first notification message may be used to instruct or notify the first terminal device to move from a current location to a location with better channel conditions (such as signal coverage conditions) to receive (or monitor) the paging message.

[0108] In some implementations, the first message is a first notification message. In this case, the first network element may send the first notification message directly to the first terminal device via the first access network device. Exemplarily, the first network element is an AMF, and the first notification message is an N1 NAS message sent by the AMF.

[0109] In some implementations, the first message includes information instructing the first access network device to send the first notification message. The instruction information can be used to instruct the first access network device to send the first notification message to the first terminal device.

[0110] In some implementations, the first message may include one or more of the following:

[0111] an identifier of the first terminal device;

[0112] Area information associated with the first terminal device (for example, tracking area indicator (TAI), cell ID, or latitude and longitude information);

[0113] The second information (notification indication) is used to notify the first terminal device to move from the current location to a location with better channel conditions (or better coverage performance) to receive the paging message;

[0114] Paging cause (for example, it may indicate the type of service that triggers paging, such as a mobile terminated call (MT call));

[0115] Next paging time (which can be a specific duration, such as 10 minutes, or a specific time point, such as 8:30);

[0116] An identifier of a protocol data unit (PDU) session associated with the first terminal device (indicating a PDU session that needs to be activated, which can be used in control plane (CP) deactivation / reactivation scenarios);

[0117] The identifier of the second access network device (which can be applied to the scenario where a paging message is sent through the first access network device after the second access network device fails to page the first terminal device, see the description below for details).

[0118] In some implementations, after receiving the first message, the first access network device may send a first notification message to the first terminal device. The first notification message may contain the same or similar content as the first message, which will not be described in detail here.

[0119] In some implementations, after receiving the first notification message, the first terminal device may perform one or more of the following actions:

[0120] The first terminal device monitors the paging message based on the network instruction or by itself moving to a location with better coverage or better channel conditions;

[0121] The first terminal device actively initiates a service request process and establishes a connection with the network for transmission of downlink data / signaling.

[0122] Based on the above, the sending of the first notification message enables the first terminal device to receive notifications even in environments with poor channel conditions, thereby prompting the user to move the first terminal device to an area with better signal coverage (for example, after receiving the notification, the user takes the phone out of their pocket, walks out of the house, or moves closer to a window) to wait for paging or actively access the network. The sending of the first notification message helps the first terminal device receive important information in a timely manner, such as answering emergency calls or receiving public safety notifications such as earthquake notifications, thereby avoiding irreparable losses caused by delayed reception of important information.

[0123] In some implementations, the first message is proactively sent by the first network element. In other implementations, the first message is triggered based on a first condition (the condition mentioned in the embodiments of the present application may also be referred to as an event).

[0124] The embodiment of the present application does not specifically limit the content of the first condition, and can be set according to actual needs. The first condition is described in detail with examples below.

[0125] Implementation 1a: The first condition is associated with the failure of the first access network device to page the first terminal device

[0126] In some implementations, when the first access network device fails to page the first terminal device (or the first access network device fails to page the first terminal device for the first time), the first network element may send a first message, thereby triggering the first access network device to send a first notification message through the first message.

[0127] For example, before a first network element in the core network sends a first message to a first access network device, the first network element may first receive a second message (e.g., a paging failure) from the first access network device. The second message may be used to indicate a paging failure for the first terminal device. After receiving the second message, the first network element may send a first message to the first access network device to trigger the first access network device to send a first notification message.

[0128] Depending on the terminal device's connection status, paging can be divided into two situations: paging initiated by the first network element (such as AMF) (it should be understood that paging initiated by the first network element will also be sent through the access network device) and paging initiated by the first access network device (i.e., paging initiated by the RAN). For paging initiated by the first network element, after the paging fails, the first access network device can notify the first network element of the second message. For paging initiated by the first access network device, the first access network device can request the first network element to send a first notification message to the first terminal device.

[0129] For example, for a paging initiated by the first network element, after the paging fails, the first access network device may send a second message to the first network element. After the first access network device sends the paging message, if the first access network device does not receive a response from the first terminal device within a certain period of time, the second message may be sent to the first network element to notify the first network element of the failure of the paging initiated by the first network element.

[0130] For another example, for a paging initiated by the first access network device, the first network element may subscribe to a paging result. If the paging fails, the first access network device sends a second message to the first network element to notify the first access network device of the failure of the paging initiated by the first access network.

[0131] For another example, for paging initiated by the first access network device, after the paging fails, the first access network device may request the first network element to send a first notification message.

[0132] The embodiment of the present application does not specifically limit the content of the second message, as long as it can indicate the paging failure of the first terminal device. In some implementations, the second message may include one or more of the following: first information (which may be called a paging failure indication, used to indicate the paging failure of the first terminal device), an identifier of the first terminal device, and a paging cause. The paging cause can be used to indicate the reason for initiating the paging, for example, it can be a paging triggered by a certain type of service (such as an Internet Protocol (IP) Multimedia Subsystem (IMS) service, MT call).

[0133] In addition to receiving the second message sent by the first access network device, the first network element may also determine that the paging of the first terminal device has failed through other means. For example, after the first network element initiates the first paging message, it may set a timer. If the first terminal device still does not initiate an access request after the timer expires, the first network element may determine that the paging has failed. In this case, the first network element may send a first message to trigger the first access network device to send a first notification message to the terminal device.

[0134] In some implementations, after determining that the paging of the first terminal device has failed, the first network element may also send (or determine whether to send) the first message to the first access network device based on one or more of the local configuration of the first network element, the capabilities of the first terminal device, network capabilities (such as the capabilities of the first access network device, such as whether the first access network device supports the transmission of the first notification message), service type, priority of the terminal device, service priority and other information. The above information can be locally configured or obtained from other network nodes. For example, the capabilities of the first terminal device can be obtained from the context (UE context) of the terminal device stored in the first network element. For another example, the capabilities of the first access network device can be reported to the first network element through the N2 message when the first access network device is turned on. For another example, one or more of the information such as the priority and service priority of the first terminal device can be obtained from the contract message stored in the unified data management (UDM) / unified data repository (UDR).

[0135] The following describes the embodiments of the present application in more detail with reference to specific examples. In the example of Figure 5, the first terminal device is UE, the first access network device is RAN, the first network element is AMF, the second message is called a paging failure message, and the first message and the first notification message are called robust notification. It should be noted that the example of Figure 5 is only to help those skilled in the art understand the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the example of Figure 5 given, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0136] Depending on the UE's connection status, paging can be divided into two situations: AMF-initiated paging and RAN-initiated paging. For AMF-initiated paging, if the paging fails, the RAN can notify the AMF of the paging failure. For RAN-initiated paging, the RAN can request the AMF to send a robust notification to the UE. Based on local configuration and / or UE capabilities and network capabilities, the AMF sends a robust notification to the RAN, which then sends a robust notification to the UE, triggering the UE to move to an area with better channel conditions to receive the paging message.

[0137] Referring to Figure 5, at step 510, the RAN sends a paging failure message to the AMF. The paging failure message may be one of the following three situations:

[0138] If the paging initiated by the AMF fails (for example, the RAN does not receive a response from the UE within a certain period of time after sending a paging message), the RAN reports the paging failure message to the AMF.

[0139] The AMF subscribes to the results of the paging initiated by the RAN and notifies the AMF if the paging fails;

[0140] RAN requests AMF to send robust notification after paging fails.

[0141] The paging failure message contains one or more of the following information:

[0142] UE identification;

[0143] Paging reason, which indicates the reason for initiating paging, for example, it may be a paging triggered by a certain type of service (such as IMS service, MT call);

[0144] Paging failure indication.

[0145] In addition, when the timer set by the AMF for the first paging message expires, if the UE still does not initiate an access request, the AMF may also send a robust notification. At this time, step S510 can be skipped and step S520 can be executed directly.

[0146] In step S520, a robust notification is sent to the access network device based on local configuration, UE capabilities, network capabilities (e.g., whether the access network device supports robust notification), service type, UE priority, service priority, and other information. The above information can be locally configured or obtained from other network nodes. For example, UE capabilities can be obtained from the UE context stored in the AMF; access network device capabilities can be reported via the N2 message when the access network device is powered on; and information such as UE priority and service priority can be obtained through the subscription message in the UDM / UDR.

[0147] The above robust notification can be one of the following two situations:

[0148] The AMF sends an N1 NAS message to the UE.

[0149] The AMF sends an indication message to the access network device, instructing the access network device to send notification information to the UE.

[0150] The robust notification includes one or more of the following information:

[0151] UE identity;

[0152] Regional information, including TAI, cell ID, or latitude and longitude information;

[0153] Notification indication instructs the UE to move to a location with better coverage and channel conditions to listen to paging messages;

[0154] Paging cause, indicating the type of service that triggers paging, such as MT call;

[0155] Next paging time.

[0156] In step S530, a robust notification is sent to the UE. The information contained in the robust notification is similar to the message in step S520. After receiving the robust notification, the UE can perform one of the following actions:

[0157] The UE monitors paging messages based on network instructions or by moving on its own to a location with better coverage and channel conditions;

[0158] The UE actively initiates a service request process to establish a connection with the network for downlink data / signaling transmission.

[0159] The robust notification proposed in the example of Figure 5 enables the UE to receive notification information even in environments with poor channel conditions, thereby notifying the user to move the phone to an area with better signal coverage (for example, after receiving the notification, the user takes the phone out of the pocket, walks out of the door, and moves to a window, etc.) to wait for paging or actively access the network. This ensures that the UE can receive important information in a timely manner, such as answering emergency calls or receiving public safety notifications such as earthquake notifications, avoiding irreparable losses caused by delays in receiving important information.

[0160] Implementation 1b: The first condition is associated with the failure of the second access network device to page the first terminal device

[0161] For ease of understanding, we first illustrate the possible application scenarios of implementation method 1b with reference to Figure 6. As shown in Figure 6, when the paging message sent by a certain access device fails, the first network element (mobility management network element of the core network) can select another nearby access network device to send a first notification message to the terminal device. For example, if the terminal device supports both NTN and TN access, then when the TN access network device fails to page successfully, the first network element can choose to page the terminal device through the NTN access network device covering the same registration area.

[0162] The "first condition is associated with the failure of the second access network device to page the first terminal device" in implementation method 1b may, for example, mean that when the second access network device fails to page the first terminal device, the first network element sends a first message, thereby sending a first notification message through the first access network device.

[0163] In some implementations, the service area of ​​the first access network device includes the registration area of ​​the first terminal device. Alternatively, the second access network device has the same service area (or coverage area) as the first access network device.

[0164] In some implementations, the first access network device may be determined through interaction between the first network element and a network function repository function (NRF) or based on access network information locally stored in the first network element.

[0165] In some implementations, the first access network device may be either an NTN access network device or a TN access network device, and may be deployed on the ground or on a satellite.

[0166] In some implementations, the second access network device can be either an NTN access network device or a TN access network device, and can be deployed on the ground or on a satellite. The combination of the first access network device and the second access network device can be one of the following: NTN+TN, NTN+NTN, or TN+TN.

[0167] In some implementations, before a first network element of the core network sends a first message to a first access network device, the first network element may first receive a second message (e.g., a paging failure) from a second access network device. The second message may be used to indicate a paging failure for the first terminal device. After receiving the second message, the first network element may send a first message to the first access network device to trigger the first access network device to send a first notification message.

[0168] Depending on the terminal device's connection status, paging can be divided into two situations: paging initiated by the first network element (such as AMF) (it should be understood that paging initiated by the first network element will also be sent through the access network device) and paging initiated by the second access network device (i.e., paging initiated by the RAN). For paging initiated by the first network element, after the paging fails, the second access network device can notify the first network element of the second message. For paging initiated by the second access network device, the second access network device can request the first network element to send a first notification message to the first terminal device.

[0169] For example, if a paging initiated by the first network element fails, the second access network device may send a second message to the first network element. After the second access network device sends the paging message, if the second access network device does not receive a response from the first terminal device within a certain period of time, the second access network device may send a second message to the first network element to notify the first network element of the failure of the paging initiated by the first network element.

[0170] For another example, for a paging initiated by the second access network device, the first network element may subscribe to a paging result. If the paging fails, the second access network device sends a second message to the first network element to notify the first network element of the failure of the paging initiated by the second access network.

[0171] For another example, for paging initiated by the second access network device, after the paging fails, the second access network device may request the first network element to send a first notification message.

[0172] The embodiments of the present application do not specifically limit the content of the second message, as long as it can indicate the paging failure of the first terminal device. In some implementations, the second message may include one or more of the following: first information (which may be called a paging failure indication, used to indicate the paging failure of the first terminal device), an identifier of the first terminal device, and a paging cause. The paging cause can be used to indicate the reason for initiating the paging, for example, it can be a paging triggered by a certain type of service (such as an IMS service, an MT call).

[0173] In addition to receiving the second message sent by the second access network device, the first network element can also determine that the paging of the first terminal device has failed through other means. For example, after the first network element initiates the first paging message, it can set a timer. If the first terminal device still does not initiate an access request after the timer expires, the first network element can determine that the paging has failed. In this case, the first network element can send a first message to trigger the first access network device to send a first notification message to the terminal device.

[0174] The following describes the embodiments of the present application in more detail with reference to specific examples. In the example of Figure 7, the first terminal device is UE, the first access network device is RAN-2, the second access network device is RAN-1, the first network element is AMF, the second message is called a paging failure message, and the first message and the first notification message are called notification. It should be noted that the example of Figure 7 is only to help those skilled in the art understand the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the example of Figure 7, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0175] In the example of Figure 7, when RAN-1 informs the AMF that the paging has failed, the AMF can select another RAN-2 with the same service area (coverage area) as RAN-1 to send a notification message to the UE, informing the UE to go to a location with better channel conditions to re-receive the paging message from RAN-2.

[0176] In step S710, after RAN-1 paging fails, it notifies the AMF.

[0177] In step S720, the AMF may interact with the NRF or, based on locally stored access network information, discover and select RAN-2 whose service area includes the target UE registration area, and send a notification to RAN-2.

[0178] The RAN-2 can be a ground-based access network device or an NTN access network device, such as an access network device deployed on a satellite. The Notification can include one or more of the following information:

[0179] UE identification;

[0180] Regional information, including TAI, cell ID, or latitude and longitude information. The area indicated by the regional information can be the registration area of ​​the terminal device, or an area with better channel conditions, or the area where the network expects the terminal device to access the network;

[0181] Paging reason, indicating the service type that triggers the paging, such as MT call;

[0182] The next paging time can be a specific duration, such as 10 minutes, or a specific time point, such as 8:30;

[0183] Access network equipment RAN-1 identification;

[0184] Notification instruction, instructing the UE to move to a location with better coverage and channel conditions to listen to paging messages;

[0185] The associated PDU session identifier indicates the PDU session that needs to be activated and is mainly used in CP deactivation / reactivation scenarios.

[0186] In step S730, the access network device RAN-2 sends a notification to the UE. After receiving the notification, the UE can perform one of the following actions:

[0187] Move to an area with good channel conditions;

[0188] Monitor specific enhanced paging messages (for enhanced paging messages, see the following description);

[0189] Establish a connection with access network equipment RAN-1;

[0190] Establish a connection with the access network device RAN-2 that sent the notification.

[0191] If the UE has established a connection with RAN-2, step S740 does not need to be executed. Alternatively, after receiving the paging message from RAN-1, the UE sends a reject paging indication and indicates in the rejection reason that it has accessed the network through another access network device.

[0192] In step S740, the AMF sets a timer based on the next paging time specified in the notification. The timer duration is greater than or equal to the next paging time. The AMF waits for the timer to expire before initiating another paging attempt and sending a paging message to RAN-1.

[0193] In step S750, the access network device RAN-1 pages the UE.

[0194] It should be noted that, in this example, the access network devices RAN-1 and RAN-2 can be either NTN access network devices or TN access network devices, and can be deployed on the ground or on a satellite.

[0195] The example in Figure 7 is applicable to scenarios where the UE is covered by multiple access network devices at the same time (including NTN+TN, NTN+NTN, and TN+TN). In this case, if the channel condition of one of the access network devices is poor and the paging message cannot be received normally, the AMF can select another access network device to initiate a notification. The example in Figure 7 does not require the design of an enhanced channel to send notifications. Instead, another access network device with better channel conditions is selected to send the notification message, which has lower requirements on the capabilities of the UE and access network devices.

[0196] Implementation 1c: Other possible settings for the first condition

[0197] In addition to implementations 1a and 1b, the first condition may also be associated with one or more of the following:

[0198] capabilities of the first terminal device;

[0199] Network capabilities (such as the capabilities of access network equipment);

[0200] The service type of the first service that triggers paging;

[0201] The priority of the first terminal device;

[0202] Priority of the service type.

[0203] For example, the first condition includes that the first terminal device supports the sending of the first notification message.

[0204] For another example, the first condition includes network capabilities supporting the sending of the first notification message. The network capabilities may, for example, refer to the capabilities of the access network device. Exemplarily, the notification message may be sent via a dedicated channel that the access network device supports.

[0205] For another example, the first condition includes that the service type of the first service triggering the paging is a target service type.

[0206] For another example, the first condition includes that the priority of the first terminal device is greater than or equal to a first threshold.

[0207] For another example, the first condition includes that the priority of the service type is greater than or equal to the second threshold.

[0208] It should be understood that the first conditions mentioned above can be used in combination with each other. For example, in the case where paging of the first terminal device fails, if the service type that triggers the paging is a specific service type, the first message can be sent.

[0209] It should also be understood that, since the first message is used to trigger the first notification message, the first condition for triggering the first message can also be understood as a condition for triggering the first notification message.

[0210] Embodiment 2: The first message is used to trigger the first access network device to send a first paging message

[0211] In some implementations, the first paging message is a paging message different from a regular paging message. For example, the first paging message may be a robust paging message or an enhanced paging message. In other words, the first paging message has a higher reception success rate than a regular paging message. For example, the first paging message has a higher transmission power than a regular paging message. In another example, the first paging message is sent using a dedicated channel.

[0212] In some implementations, the first paging message is a paging message sent when the second access network device fails to page the first terminal device. In other words, the first paging message is a paging message sent by the first network element to the first terminal device via another access network device when the second access network device fails to page the first terminal device. This solution can be applied to the scenario shown in Figure 6.

[0213] In some implementations, the first message is a first paging message, ie, an enhanced paging message.

[0214] In some implementations, the first message includes instruction information to instruct the access network device to send an enhanced paging message.

[0215] In some implementations, the first message may include one or more of the following:

[0216] an identifier of the first terminal device;

[0217] The service type of the first service that triggers paging, such as IMS service, emergency service, etc.;

[0218] Fourth information (robust paging indication), used to instruct the first access network device to send an enhanced paging message;

[0219] Area information associated with the first terminal device, such as a registration area list;

[0220] The paging priority corresponding to the first service, when multiple services need to use the first paging message, can give priority to providing resources for paging terminal devices and / or services with higher priority;

[0221] Paging reason.

[0222] In some implementations, the first paging message includes one or more of the following:

[0223] an identifier of the first terminal device;

[0224] The service type of the first service that triggers the paging, such as IMS service, emergency service, etc. The service type may also be indicated in the paging reason;

[0225] Paging reason.

[0226] In some implementations, Embodiment 2 and Embodiment 1 may be combined. For example, a first paging message may be sent to the first terminal device. If the first paging message fails to be sent, the first notification message described in Embodiment 1 may be sent to the first terminal device. This increases the probability of successful paging and ensures the successful delivery of important information such as emergency services.

[0227] The embodiments of this application do not specifically limit the triggering method of the first message. For example, the first network element may proactively send the first message. In another example, the first message may be triggered based on a second condition. The second condition can be set based on actual needs and is not specifically limited in this embodiment of the application. Several possible implementations of the second condition are described below.

[0228] Implementation 2a: The second condition is associated with the failure of the first access network device to page the first terminal device

[0229] Implementation 2a can be implemented similarly to Implementation 1a. The difference between the two is that after the first access network device fails to paging, a first paging message is sent instead of a first notification message. In other words, the first access network device can send a standard paging message for the first paging attempt. If the paging attempt fails, an enhanced paging message is used to page the first terminal device. For other details, refer to the description of Implementation 1a. To avoid repetition, these details are not repeated here.

[0230] Implementation 2b: The second condition is associated with the failure of the second access network device to page the first terminal device

[0231] For ease of understanding, we first illustrate the possible application scenarios of implementation method 2b with reference to Figure 6. As shown in Figure 6, when a paging message sent by an access device fails, the first network element (mobility management network element of the core network) can select another nearby access network device to send a first notification message to the terminal device. For example, if the terminal device supports both NTN and TN access, then when the TN access network device fails to page successfully, the first network element can choose to page the terminal device through the NTN access network device covering the same registration area.

[0232] The "first condition is associated with the failure of the second access network device to page the first terminal device" in implementation method 2 may, for example, mean: when the second access network device fails to page the first terminal device, the first network element sends a first message, thereby sending a first notification message through the first access network device.

[0233] In some implementations, the service area of ​​the first access network device includes the registration area of ​​the first terminal device. Alternatively, the second access network device has the same service area (or coverage area) as the first access network device.

[0234] In some implementations, the first access network device may be determined through interaction between the first network element and the NRF or based on access network information locally stored in the first network element.

[0235] In some implementations, the first access network device may be either an NTN access network device or a TN access network device, and may be deployed on the ground or on a satellite.

[0236] In some implementations, the second access network device can be either an NTN access network device or a TN access network device, and can be deployed on the ground or on a satellite. The combination of the first access network device and the second access network device can be one of the following: NTN+TN, NTN+NTN, or TN+TN.

[0237] In some implementations, before a first network element of a core network sends a first message to a first access network device, the first network element may first receive a second message (e.g., a paging failure) from a second access network device. The second message may be used to indicate a paging failure for the first terminal device. After receiving the second message, the first network element may send a first message to the first access network device to trigger the first access network device to send a first paging message.

[0238] Depending on the terminal device's connection status, paging can be divided into two situations: paging initiated by the first network element (such as AMF) (it should be understood that paging initiated by the first network element will also be sent through the access network device) and paging initiated by the second access network device (i.e., paging initiated by the RAN). For paging initiated by the first network element, after the paging fails, the second access network device can notify the first network element of the second message. For paging initiated by the second access network device, the second access network device can request the first network element to send the first paging message to the first terminal device.

[0239] For example, for a paging initiated by the first network element, after the paging fails, the second access network device may send a second message to the first network element. For example, after the second access network device sends the paging message, if the second access network device does not receive a response from the first terminal device within a certain period of time, the second access network device may send a second message to the first network element to notify the first network element of the failure of the paging initiated by the first network element.

[0240] For another example, for a paging initiated by the second access network device, the first network element may subscribe to a paging result. If the paging fails, the second access network device sends a second message to the first network element to notify the first network element of the failure of the paging initiated by the second access network.

[0241] For another example, for paging initiated by the second access network device, after the paging fails, the second access network device may request the first network element to send a first paging message.

[0242] The embodiments of the present application do not specifically limit the content of the second message, as long as it can indicate the paging failure of the first terminal device. In some implementations, the second message may include one or more of the following: first information (which may be called a paging failure indication, used to indicate the paging failure of the first terminal device), an identifier of the first terminal device, and a paging cause. The paging cause can be used to indicate the reason for initiating the paging, for example, it can be a paging triggered by a certain type of service (such as an IMS service, an MT call).

[0243] In addition to receiving the second message sent by the second access network device, the first network element can also determine that the paging of the first terminal device has failed through other means. For example, after the first network element initiates the first paging message, it can set a timer. If the first terminal device still does not initiate an access request after the timer expires, the first network element can determine that the paging has failed. In this case, the first network element can send a first message to trigger the first access network device to send a first notification message to the terminal device.

[0244] The following describes the embodiments of the present application in more detail with reference to specific examples. In the example of Figure 8, the first terminal device is UE, the first access network device is RAN-2, the second access network device is RAN-1, the first network element is AMF, the second message is called a paging failure message, and the first message and the first paging message are both enhanced paging messages. It should be noted that the example of Figure 8 is only to help those skilled in the art understand the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the example of Figure 8 given, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0245] In the example of Figure 8, when RAN-1 informs AMF that the paging has failed, AMF can select another RAN-2 with the same service area (coverage area) as RAN-1 to page the UE. After the UE establishes a connection with RAN-2, the corresponding downlink data transmitted through AMF (cellular internet of things control plane optimization (CIoT CP optimization)) or signaling can be sent by RAN-2 to the UE.

[0246] In step 810, after the paging fails, RAN-1 notifies the AMF. For details, refer to step 810 in embodiment 2 and will not be repeated here.

[0247] In step 820, the AMF may interact with the NRF or, based on locally stored access network information, discover and select RAN-2 whose service area includes the target UE registration area, and send a paging message to RAN-2.

[0248] The RAN-2 may be a ground-based access network device or an NTN access network device, such as a satellite-based access network device. The paging message may include one or more of the following information:

[0249] UE identification;

[0250] Regional information, including TAI, cell ID, or latitude and longitude information;

[0251] Paging reason, indicating the service type that triggers paging, such as MT call.

[0252] In step 830, the access network device RAN-2 pages the UE via a paging message. The paging message includes one or more of the following information:

[0253] UE identification information;

[0254] Regional information; including TAI, cell ID or latitude and longitude information;

[0255] Paging reason, indicating the service type that triggers paging, such as MT call.

[0256] After the UE establishes a connection with RAN-2, the AMF can send downlink data or signaling from RAN-2 to the UE. For example, the AMF can directly send data and signaling sent via the CP plane to RAN-2. For data sent via the user plane, the AMF needs to instruct RAN-1 and the corresponding PSA UPF to redirect the data to RAN-2.

[0257] The example of Figure 8 is applicable to scenarios where the UE is under the coverage of multiple access network devices at the same time (including NTN+TN, NTN+NTN, TN+TN). After the paging of the first access network device fails, the AMF can select another access network device for paging and send the downlink data or signaling to the UE through the second access network device. Since there may be no obstruction between the second access network device and the UE, the channel conditions are better and the success rate of downlink data / signaling is higher. Using the second access network device to send downlink data / signaling does not require the UE to move, nor does it require enhancing the existing paging message or using a dedicated channel. It is more suitable for some IoT devices that cannot be moved or have simple functions.

[0258] Implementation 2c: Alternative settings for the second condition

[0259] The second condition can be associated with one or more of the following:

[0260] capabilities of the first terminal device;

[0261] Network capabilities;

[0262] The service type of the first service that triggers paging;

[0263] The priority of the first terminal device;

[0264] Priority of business types;

[0265] third information sent by a second network element of the core network (which may be a network element performing session management, such as an SMF, a serving gateway (SGW), or a packet data network gateway (PGW)), where the third information is used to instruct the first network element to send an enhanced paging message;

[0266] A differentiated services code point (DSCP) corresponding to the first service;

[0267] a paging policy indicator (PPI) corresponding to the first service;

[0268] an allocation and retention priority (ARP) corresponding to the first service;

[0269] a 5G QoS identifier (5QI) corresponding to the first service;

[0270] QoS flow identifier (QFI) corresponding to the first service.

[0271] For example, the second condition includes that the first terminal device supports the sending of the first paging message.

[0272] For another example, the second condition includes network capabilities supporting the sending of the first paging message. The network capabilities may refer to the capabilities of the access network device. For example, the first paging message may be sent via a dedicated channel, and the access network device supports the dedicated channel.

[0273] For another example, the second condition includes that the service type of the first service triggering the paging is a target service type.

[0274] For another example, the second condition includes that the priority of the first terminal device is greater than or equal to a first threshold.

[0275] For another example, the second condition includes that the priority of the service type is greater than or equal to a second threshold.

[0276] For another example, the second condition includes the second network element sending third information to the first network element, where the third information instructs the first network element to send an enhanced paging message. The third information may be an enhanced paging indication. Alternatively, the third information may be a PPI. The PPI may have a new value to indicate the sending of an enhanced paging message. The third information may be determined by the second network element based on one or more of the following information: the service type corresponding to the first downlink data, the priority corresponding to the first downlink data, and the DSCP corresponding to the first downlink data.

[0277] It should be understood that the second conditions mentioned above can be used in combination with each other. For example, in the case where the paging of the first terminal device fails, if the service type that triggers the paging is a specific service type, the first message can be sent.

[0278] The following describes the embodiments of the present application in more detail with reference to specific examples. In the example of Figure 9, the first terminal device is UE, the first access network device is RAN, the first network element is AMF, the second network element is SMF, and the first paging message is called robust paging. It should be noted that the example of Figure 9 is only to help those skilled in the art understand the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the example of Figure 9 given, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0279] In this embodiment, when there is downlink service, the UPF can send the DSCP value on the type of service (TOS) (for IPv4) / traffic class (TC) (for IPv6) in the IP header of the data packet and the QFI of the downlink data packet to the SMF. The SMF determines the PPI based on the DSCP and sends parameters such as the PPI, ARP, and 5QI to the AMF. The AMF determines whether robust paging needs to be applied based on the above parameters and whether the UE is in the CM-IDLE state. The steps in Figure 9 are described below.

[0280] In step S910, when downlink data arrives at the UPF, the UPF can read the DSCP (differentiated services code point) value from the TOS (IPv4) / TC (IPv6) bit in the IP header of the data packet and send the DSCP and QFI to the SMF.

[0281] In step S920, the SMF determines the PPI and sends the PPI, ARP, 5QI, and QFI to the AMF. Alternatively, the SMF sends an instruction to the AMF based on the above information, instructing the AMF to use robust paging.

[0282] In step S930, the AMF determines the paging strategy based on local configuration, PPI, ARP, and 5QI. Alternatively, it applies robust paging based on the instructions received from the SMF and notifies the access network device to use robust paging.

[0283] The notification message contains at least one or more of the following information:

[0284] UE identity;

[0285] Service type, such as IMS service, emergency service, etc.

[0286] Robust paging indication, instructing the access network device to send robust paging;

[0287] Registration Area list, indicating the UE's registration area;

[0288] Paging priority: When multiple services require robust paging, resources can be preferentially provided for paging higher-priority UEs and services.

[0289] In step S940, after receiving the robust paging related information sent by the AMF, the access network device adopts robust paging on a specific channel.

[0290] The above robust paging includes one or more of the following parameters:

[0291] UE identity;

[0292] Service type, such as IMS service, emergency service, etc. The service type can be indicated in the paging cause.

[0293] The robust paging method proposed in the example of Figure 9 can directly send robust paging after identifying a specific service type and / or a specific UE, and / or a specific service priority or UE priority, so that users can establish a connection with the network and receive important information in a timely manner even when the channel conditions are poor or there is obstruction. For example, when the network identifies the service type as an emergency service such as an earthquake warning or a rescue call, it can directly enhance the paging signal or page the UE on a dedicated channel, so that the UE has a high probability of receiving the paging message during the first paging, thus eliminating the need for a second paging and further reducing the delay in sending the emergency service.

[0294] It should be noted that, since the first message is used to trigger the first paging message, the second condition for triggering the first message mentioned above can also be understood as a condition for triggering the first paging message. Of course, in some implementations, the first paging message can also be triggered based on other conditions or methods. For example, the first paging message can be triggered by a first downlink data packet (a downlink data packet of the first terminal device). This implementation is described in detail below.

[0295] In some implementations, the first downlink data packet (such as the header of the first downlink data packet, exemplarily, the general packet radio service tunneling protocol-user plane (GTP-U) header) may include indication information, which is used to instruct the first access network device to trigger a first paging message. The indication information may be a robust paging indication or a PPI. For example, the PPI may add a new value to indicate the sending of an enhanced paging message. The PPI may be determined by the second network element (session management network element, such as SMF, SGW, PGW) or the third network element (network element for user plane data transmission, such as UPF) based on one or more of the following information: the service type corresponding to the first downlink data, the priority corresponding to the first downlink data, and the DSCP corresponding to the first downlink data.

[0296] The following describes the embodiments of the present application in more detail with reference to specific examples. In the example of Figure 10, the first terminal device is a UE, the first access network device is a RAN, the second network element is an SMF, the third network element is a UPF, and the first paging message is called robust paging. It should be noted that the example of Figure 10 is only intended to help those skilled in the art understand the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the example of Figure 10 given, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0297] In the example of Figure 10, for a UE in RRC_INACTIVE state, if the AMF has not subscribed to the UE's connection status with the RAN, the AMF will not be aware that the UE is in RRC_INACTIVE state and will not initiate paging. In this case, the RAN will only initiate paging when it receives downlink data from the UPF or an N1 signaling message from the SMF.

[0298] In step S1010, when downlink data arrives at the UPF, the UPF can read the DSCP value from the TOS (IPv4) / TC (IPv6) bit in the IP header of the data packet and send the DSCP and QFI to the SMF.

[0299] In step S1020, the SMF determines whether robust paging is required based on the service type and priority information (indicated by the DSCP). If robust paging is required, the SMF may send a robust paging indication (which may be a newly added PPI value) to the UPF. The UPF then adds the robust paging indication to the DL data packet header (e.g., the GTP-U header), or adds a PPI representing the robust paging indication.

[0300] It should be noted that the UPF can also directly add a robust paging indication in the DL data packet header or add a PPI representing a robust paging indication without interacting with the SMF. For example, based on local configuration, the above operation is performed as long as a specific DSCP value is identified.

[0301] In step S1030, the access network device receives a downlink data packet with a robust paging indication or a specific PPI value in the packet header and performs robust paging.

[0302] The above robust paging includes one or more of the following parameters:

[0303] UE identity;

[0304] Service type, such as IMS service, emergency service, etc. The service type can be indicated in the paging cause.

[0305] The example in Figure 10 is primarily for UEs in the RRC_INACTIVE state. In this case, robust paging can be initiated by the RAN based on the PPI value or robust paging indication in the data packet header. The PPI value or robust paging indication can be added by the UPF to the data packet header, such as the GTP-U header, based on instructions from the SMF or local configuration. The example in Figure 10 does not require the robust paging indication to be transmitted via multi-hop control plane signaling. Instead, the access network device directly obtains the robust indication from the data packet sent by the UPF, enabling more rapid triggering of robust paging and further reducing the latency of delivering emergency services.

[0306] The above text provides detailed examples of the content and transmission method of the first notification message and the first paging message. It should be noted that the first notification message and the first paging message provided in the embodiment of the present application can be triggered based on the first message (or first network element) mentioned above, or can be triggered autonomously by the first access network device. In order to ensure that terminal devices with low SNR can also receive paging messages, the following implementation methods can be used:

[0307] 1. Robust paging method 1: Robust paging is used during the first paging (for example, increasing signal strength, designing a dedicated channel, etc.) to ensure that the first terminal device can receive the paging message with a high probability even under low signal-to-noise ratio (SNR) conditions;

[0308] 2. Robust paging method 2: After the first paging fails, you can send a second robust paging;

[0309] 3. Robust notification: After the first paging fails, a notification message can be sent to the first terminal device to notify the first terminal device to move out of the current area to an area with better coverage and signal conditions, and the network sends a paging message to it a second time;

[0310] 4. Robust paging + notification / paging: Robust paging is used for the first paging. If the paging fails, the network can send a notification or paging message a second time.

[0311] 5. Robust paging / notification in multi-access networks: When paging by one access network fails, another access network can page the device. For example, when paging by a TN access network device fails, the mobility management network element (AMF / MME) can send a notification or paging message through a nearby NTN.

[0312] In addition, the above method can be further limited to be executed when at least one of the following conditions is met:

[0313] For specific terminal devices or specific services; such as MT calls, emergency broadcasts, public safety-related announcements, etc.

[0314] For UEs or services with a priority higher than a certain level;

[0315] Specific event triggering, such as when the first paging fails, or when other network elements, access network devices, UEs, or application servers request triggering.

[0316] In some implementations, before sending the above message, the first terminal device may first exchange capability information with the first network element to determine whether the above message can be sent. The capability message process between the first terminal device and the first network element is described in detail below.

[0317] In some implementations, the first network element receives a third message sent by the first terminal device. The third message may be an N1 NAS message. The third message includes one or more of the following information:

[0318] Fifth information, used to indicate whether the first terminal device has a capability of supporting enhanced paging messages and / or first notification messages;

[0319] The identifier of the first terminal device (such as subscription permanent identifier (SUPI), subscription concealed identifier (SUCI), PEI, temporary mobile subscriber identity (TMSI), globally unique temporary UE identity (GUTI), 5G-S-TMSI or globally unique AMF identifier (GUAMI));

[0320] The service type associated with the enhanced paging message and / or the first notification message, such as IMS service, emergency service, etc.

[0321] There are many ways to implement the fifth information. For example, the fifth information may indicate one or more of the following information (the meaning of these information can be found in the above description):

[0322] Whether robust paging mode 1 is supported;

[0323] Whether to support robust paging mode 2;

[0324] Whether robust notification is supported;

[0325] Whether robust paging+notification / paging is supported;

[0326] Whether to support multi-access network assisted robust paging / notification.

[0327] In some implementations, the first network element sends a fourth message (which may be a response message to the third message) to the first terminal device.

[0328] The fourth message includes one or more of the following information:

[0329] Sixth information, used to indicate whether to allow transmission of the enhanced paging message and / or the first notification message;

[0330] The identifier of the first terminal device (such as SUPI, SUCI, PEI, TMSI, GUTI, 5G-S-TMSI or GUAMI);

[0331] The service types that allow the use of enhanced paging messages and / or first notification messages, ie, robust notification / alert / paging is performed only for the allowed service types.

[0332] In some implementations, the sixth information may indicate one or more of the following:

[0333] Whether to support robust paging mode 1

[0334] Whether to support robust paging mode 2

[0335] Whether to support robust notification

[0336] Whether robust paging+notification / paging is supported

[0337] Whether to support multi-base station assisted robust paging / notification

[0338] In some implementations, the fourth message is determined based on local configuration information of the first network element and / or network capabilities (such as capabilities of access network devices).

[0339] The following describes the embodiments of the present application in more detail with reference to specific examples. In the example of Figure 11, the first terminal device is UE, the first access network device is RAN, the first network element is AMF, and the first notification message and the first paging message are called robust notification / paging. It should be noted that the example of Figure 11 is only to help those skilled in the art understand the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the example of Figure 11, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0340] In the example of Figure 11, the UE can negotiate with the AMF (MME in the 4G system) regarding the robust notification / alert / paging capability during the registration process to determine whether robust notification / alert / paging can be applied in subsequent downlink data / signaling transmission.

[0341] Referring to Figure 11, in step S1110, the UE reports its capabilities to the AMF.

[0342] This message can be forwarded to the AMF via the access network equipment via the N1 NAS message. This message contains one of the following parameters:

[0343] Whether robust notification / alert / paging is supported;

[0344] Whether robust paging mode 1 is supported;

[0345] Whether to support robust paging mode 2;

[0346] Whether to support robust notification;

[0347] Whether robust paging+notification / paging is supported;

[0348] Whether to support multi-base station assisted robust paging / notification.

[0349] In addition, the message may also include UE identification information such as SUPI, SUCI, PEI, TMSI, GUTI, 5G-S-TMSI, GUAMI, etc. for identifying the UE.

[0350] In addition, the message may also include a service type: for example, IMS service, emergency service, etc.

[0351] In step S1120, the AMF determines whether robust notification / alert / paging is supported based on local configuration and network capabilities (e.g., access network device capabilities), and sends it to the UE through a NAS message.

[0352] The message contains one of the following parameters:

[0353] Whether robust notification / alert / paging is supported / allowed, specifically, corresponding to the description above

[0354] Whether to support robust paging mode 1

[0355] Whether to support robust paging mode 2

[0356] Whether to support robust notification

[0357] Whether robust paging+notification / paging is supported

[0358] Whether to support multi-base station assisted robust paging / notification

[0359] In addition, the message may also include identification information such as SUPI, SUCI, PEI, TMSI, GUTI, 5G-S-TMSI, GUAMI, etc. for identifying the UE.

[0360] In addition, the message may also include allowed service types: that is, robust notification / paging is performed only for allowed service types.

[0361] Figure 11 illustrates the capability negotiation process between the UE and the AMF. Robust notification / paging requires the UE and access network equipment to support specific channel designs or power adjustments, and therefore can only be performed between UEs and access network equipment that support robust notification / paging. The UE assists the AMF in configuring appropriate paging by reporting its robust notification / paging capabilities. The AMF can also determine whether robust paging / notification is permitted for the UE based on information such as network configuration and access network equipment capabilities.

[0362] The above describes the method embodiment of the present application in detail, and the following describes the device embodiment of the present application in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so for parts not described in detail, reference can be made to the previous method embodiment.

[0363] Figure 12 is a structural diagram of a communication device provided in an embodiment of the present application. The communication device 1200 shown in Figure 12 can be a first network element of a core network. The communication device 1200 includes: a first communication module 1210, for sending a first message to a first access network device, the first message being used to trigger the first access network device to send a first notification message or a first paging message; wherein the first notification message is used to notify the first terminal device to move from a current position to a position with better channel conditions to receive a paging message; wherein the first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0364] In some implementations, the first message is used to trigger the first access network device to send the first notification message.

[0365] In some implementations, the first message is triggered based on a first condition, where the first condition is associated with one or more of the following:

[0366] The first access network device or the second access network device fails to page the first terminal device;

[0367] capabilities of the first terminal device;

[0368] Network capabilities;

[0369] The service type of the first service that triggers paging;

[0370] the priority of the first terminal device;

[0371] The priority of the service type.

[0372] In some implementations, the first communication module is further configured to:

[0373] Before the first network element of the core network sends the first message to the first access network device, the first network element receives a second message from the first access network device or the second access network device, where the second message includes one or more of the following:

[0374] First information, used to indicate that paging of the first terminal device has failed;

[0375] an identifier of the first terminal device;

[0376] Paging reason.

[0377] In some implementations, the first message includes one or more of the following:

[0378] an identifier of the first terminal device;

[0379] area information associated with the first terminal device;

[0380] The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message;

[0381] Paging reason;

[0382] Next paging time;

[0383] an identifier of a protocol data unit (PDU) session associated with the first terminal device;

[0384] The identifier of the second access network device.

[0385] In some implementations, the first message is the first notification message; or, the first message includes information instructing the first access network device to send the first notification message.

[0386] In some implementations, the first message is used to trigger the first access network device to send the first paging message.

[0387] In some implementations, the first message is triggered based on a second condition, where the second condition is associated with one or more of the following:

[0388] The first access network device or the second access network device fails to page the first terminal device;

[0389] capabilities of the first terminal device;

[0390] Network capabilities;

[0391] The service type of the first service that triggers paging;

[0392] the priority of the first terminal device;

[0393] The priority of the service type;

[0394] third information sent by a second network element of the core network, where the third information is used to instruct the first network element to send an enhanced paging message;

[0395] a differentiated services code point DSCP corresponding to the first service;

[0396] a paging policy indication PPI corresponding to the first service;

[0397] Allocation and Reservation Priority (ARP) corresponding to the first service;

[0398] The fifth-generation service quality identifier 5QI corresponding to the first service;

[0399] The quality of service flow identifier QFI corresponding to the first service.

[0400] In some implementations, the second network element is used to perform session management.

[0401] In some implementations, the first message includes one or more of the following:

[0402] an identifier of the first terminal device;

[0403] The service type of the first service that triggers paging;

[0404] fourth information, used to instruct the first access network device to send an enhanced paging message;

[0405] area information associated with the first terminal device;

[0406] the paging priority corresponding to the first service;

[0407] Paging reason.

[0408] In some implementations, the first message is an enhanced paging message.

[0409] In some implementations, the first communication module is further configured to:

[0410] Receive a third message sent by the first terminal device, where the third message includes one or more of the following information:

[0411] Fifth information, used to indicate whether the first terminal device has a capability of supporting enhanced paging messages and / or the first notification message;

[0412] an identifier of the first terminal device;

[0413] The enhanced paging message and / or the first notification message are associated with a service type.

[0414] In some implementations, the first communication module is further configured to:

[0415] Send a fourth message to the first terminal device, where the fourth message includes one or more of the following information:

[0416] Sixth information, used to indicate whether to allow transmission of the enhanced paging message and / or the first notification message;

[0417] an identifier of the first terminal device;

[0418] A service type that allows use of the enhanced paging message and / or the first notification message.

[0419] In some implementations, the fourth message is determined based on local configuration information and / or network capabilities of the first network element.

[0420] In some implementations, the first network element is used to perform mobility management.

[0421] Figure 13 is a structural diagram of a communication device provided in an embodiment of the present application. The communication device 1300 shown in Figure 13 can be a first access network device. The communication device 1300 includes: a first communication module 1310, used to send a first notification message or a first paging message to a first terminal device; wherein, the first notification message is used to notify the first terminal device to move from a current position to a position with better channel conditions to receive a paging message; wherein, the first paging message is an enhanced paging message, or, the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0422] In some implementations, the first notification message is triggered based on a first condition, where the first condition is associated with one or more of the following:

[0423] The first access network device or the second access network device fails to page the first terminal device;

[0424] receiving a first message sent by a first network element in the core network, where the first message is used to trigger the first notification message;

[0425] capabilities of the first terminal device;

[0426] Network capabilities;

[0427] The service type of the first service that triggers paging;

[0428] the priority of the first terminal device;

[0429] The priority of the service type.

[0430] In some implementations, the first message is the first notification message; or, the first message includes indication information instructing the first access network device to send the first notification message.

[0431] In some implementations, before the first access network device sends the first notification message or the first paging message to the first terminal device, the communication device further includes:

[0432] The first access network device sends a second message to a first network element of the core network, where the second message includes one or more of the following:

[0433] The first information is used to indicate a paging failure;

[0434] an identifier of the first terminal device;

[0435] Paging reason.

[0436] In some implementations, the first notification message includes one or more of the following:

[0437] an identifier of the first terminal device;

[0438] area information associated with the first terminal device;

[0439] The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message;

[0440] Paging reason;

[0441] Next paging time;

[0442] an identifier of the PDU session associated with the first terminal device;

[0443] The identifier of the second access network device.

[0444] In some implementations, the first paging message is triggered based on a second condition, where the second condition is associated with one or more of the following:

[0445] The first access network device or the second access network device fails to page the first terminal device;

[0446] receiving a first message sent by a first network element of a core network, where the first message is used to trigger the first paging message;

[0447] capabilities of the first terminal device;

[0448] Network capabilities;

[0449] The service type of the first service that triggers paging;

[0450] the priority of the first terminal device;

[0451] The priority of the service type;

[0452] a differentiated services code point DSCP corresponding to the first service;

[0453] a paging policy indication PPI corresponding to the first service;

[0454] Allocation and Reservation Priority (ARP) corresponding to the first service;

[0455] The fifth-generation service quality identifier 5QI corresponding to the first service;

[0456] A quality of service flow identifier (QFI) corresponding to the first service;

[0457] Indication information in the first downlink data packet.

[0458] In some implementations, the indication information is PPI.

[0459] In some implementations, the first paging message includes one or more of the following:

[0460] an identifier of the first terminal device;

[0461] The service type of the first service that triggers paging;

[0462] Paging reason.

[0463] Figure 14 is a structural diagram of a communication device provided in an embodiment of the present application. The communication device 1400 shown in Figure 14 can be a first terminal device. The communication device includes: a first communication module 1410, used to receive a first notification message or a first paging message sent by a first access network device; wherein, the first notification message is used to notify the first terminal device to move from the current position to a position with better channel conditions to receive a paging message; wherein, the first paging message is an enhanced paging message, or, the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

[0464] In some implementations, the first notification message is triggered based on a first condition, where the first condition is associated with one or more of the following:

[0465] The first access network device or the second access network device fails to page the first terminal device;

[0466] The first access network device receives a first message sent by a first network element in the core network, where the first message is used to trigger the first notification message;

[0467] capabilities of the first terminal device;

[0468] Network capabilities;

[0469] The service type of the first service that triggers paging;

[0470] the priority of the first terminal device;

[0471] The priority of the service type.

[0472] In some implementations, the first message is the first notification message; or, the first message includes indication information instructing the first access network device to send the first notification message.

[0473] In some implementations, the first notification message includes one or more of the following:

[0474] an identifier of the first terminal device;

[0475] area information associated with the first terminal device;

[0476] The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message;

[0477] Paging reason;

[0478] Next paging time;

[0479] an identifier of a protocol data unit (PDU) session associated with the first terminal device;

[0480] The identifier of the second access network device.

[0481] In some implementations, the first paging message is triggered based on a second condition, where the second condition is associated with one or more of the following:

[0482] The first access network device or the second access network device fails to page the first terminal device;

[0483] The first access network device receives a first message sent by a first network element of a core network, where the first message is used to trigger the first paging message;

[0484] capabilities of the first terminal device;

[0485] Network capabilities;

[0486] The service type of the first service that triggers paging;

[0487] the priority of the first terminal device;

[0488] The priority of the service type;

[0489] a differentiated services code point DSCP corresponding to the first service;

[0490] a paging policy indication PPI corresponding to the first service;

[0491] Allocation and Reservation Priority (ARP) corresponding to the first service;

[0492] The fifth-generation service quality identifier 5QI corresponding to the first service;

[0493] The quality of service flow identifier QFI corresponding to the first service.

[0494] Indication information in the first downlink data packet.

[0495] In some implementations, the indication information is PPI.

[0496] In some implementations, the first paging message includes one or more of the following:

[0497] an identifier of the first terminal device;

[0498] The service type of the first service that triggers paging;

[0499] Paging reason.

[0500] In some implementations, the first communication module is further configured to:

[0501] Send a third message to the first network element of the core network, where the third message includes one or more of the following information:

[0502] Fifth information, used to indicate whether the first terminal device has a capability of supporting enhanced paging messages and / or the first notification message;

[0503] an identifier of the first terminal device;

[0504] The enhanced paging message and / or the first notification message are associated with a service type.

[0505] In some implementations, the first communication module is further configured to:

[0506] Receive a fourth message sent by the first network element, where the fourth message includes one or more of the following information:

[0507] Sixth information, used to indicate whether to allow transmission of the enhanced paging message and / or the first notification message;

[0508] an identifier of the first terminal device;

[0509] A service type that allows use of the enhanced paging message and / or the first notification message.

[0510] In some implementations, the fourth message is determined based on local configuration information and / or network capabilities of the first network element.

[0511] In some implementations, the first network element is used to perform mobility management.

[0512] Figure 15 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The communication device 1500 shown in Figure 15 may be a second network element of a core network. The communication device 1500 includes a first communication module 1510 configured to send third information to the first network element or a third network element, the third information being configured to trigger transmission of an enhanced paging message.

[0513] In some implementations, the third information is a paging policy indication (PPI).

[0514] In some implementations, the third information is determined based on one or more of the following:

[0515] The service type corresponding to the first downlink data;

[0516] The priority corresponding to the first downlink data;

[0517] The differentiated services code point DSCP corresponding to the first downlink data.

[0518] In some implementations, the second network element is used to perform session management; and / or the third network element is used to perform user plane data transmission; and / or the first network element is used to perform mobility management.

[0519] Figure 16 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The communication device 1600 shown in Figure 16 can be a third network element in a core network, and the communication device 1600 includes: a first communication module 1610, configured to send first downlink data to a first access network device, the first downlink data including third information, the third information being configured to trigger the first access network device to send an enhanced paging message.

[0520] In some implementations, the third information is a paging policy indication (PPI).

[0521] In some implementations, the third information is determined based on one or more of the following:

[0522] The service type corresponding to the first downlink data;

[0523] Instruction information sent by the second network element of the core network;

[0524] The priority corresponding to the first downlink data;

[0525] The differentiated services code point DSCP corresponding to the first downlink data.

[0526] In some implementations, the second network element is used to perform session management.

[0527] In some implementations, the third network element is used to perform user plane data transmission.

[0528] Figure 17 is a schematic block diagram of a communication device according to an embodiment of the present application. Dashed lines in Figure 17 indicate that the unit or module is optional. Device 1700 may be used to implement the method described in the above method embodiment. Device 1700 may be a chip, a terminal device, or a core network device.

[0529] The device 1700 may include one or more processors 1710. The processor 1710 may support the device 1700 to implement the method described in the method embodiment above. The processor 1710 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0530] The apparatus 1700 may further include one or more memories 1720. The memories 1720 store programs that can be executed by the processor 1710, causing the processor 1710 to perform the methods described in the above method embodiments. The memories 1720 may be independent of the processor 1710 or integrated into the processor 1710.

[0531] The apparatus 1700 may further include a transceiver 1730. The processor 1710 may communicate with other devices or chips via the transceiver 1730. For example, the processor 1710 may transmit and receive data with other devices or chips via the transceiver 1730.

[0532] The present invention also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the communication device provided in the present invention, and the program enables a computer to execute the method performed by the communication device in each embodiment of the present invention.

[0533] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided in the present application, and the program causes a computer to execute the method performed by the communication device in each embodiment of the present application.

[0534] The embodiments of the present application also provide a computer program. The computer program can be applied to the communication device provided in the embodiments of the present application, and the computer program enables a computer to execute the method executed by the communication device in each embodiment of the present application.

[0535] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0536] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0537] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0538] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0539] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0540] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0541] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0542] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0543] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0544] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0545] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0546] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0547] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: A first network element of the core network sends a first message to a first access network device, where the first message is used to trigger the first access network device to send a first notification message or a first paging message; The first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; The first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

2. The method according to claim 1, characterized in that The first message is used to trigger the first access network device to send the first notification message.

3. The method according to claim 2, characterized in that The first message is triggered based on a first condition, where the first condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type.

4. The method according to claim 2 or 3, characterized in that Before the first network element of the core network sends the first message to the first access network device, the method further includes: The first network element receives a second message from the first access network device or the second access network device, where the second message includes one or more of the following: First information, used to indicate that paging of the first terminal device has failed; an identifier of the first terminal device; Paging reason.

5. The method according to any one of claims 2 to 4, characterized in that The first message includes one or more of the following: an identifier of the first terminal device; area information associated with the first terminal device; The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message; Paging reason; Next paging time; an identifier of a protocol data unit (PDU) session associated with the first terminal device; The identifier of the second access network device.

6. The method according to any one of claims 2 to 5, characterized in that: The first message is the first notification message; or, The first message includes information instructing the first access network device to send the first notification message.

7. The method according to claim 1, characterized in that The first message is used to trigger the first access network device to send the first paging message.

8. The method according to claim 7, characterized in that The first message is triggered based on a second condition, where the second condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type; third information sent by a second network element of the core network, where the third information is used to instruct the first network element to send an enhanced paging message; a differentiated services code point DSCP corresponding to the first service; a paging policy indication PPI corresponding to the first service; Allocation and Reservation Priority (ARP) corresponding to the first service; The fifth-generation service quality identifier 5QI corresponding to the first service; The quality of service flow identifier QFI corresponding to the first service.

9. The method according to claim 8, characterized in that The second network element is used for session management.

10. The method according to any one of claims 7 to 9, characterized in that The first message includes one or more of the following: an identifier of the first terminal device; The service type of the first service that triggers paging; fourth information, used to instruct the first access network device to send an enhanced paging message; area information associated with the first terminal device; the paging priority corresponding to the first service; Paging reason.

11. The method according to any one of claims 7 to 10, characterized in that The first message is an enhanced paging message.

12. The method according to any one of claims 1 to 11, characterized in that The method further comprises: The first network element receives a third message sent by the first terminal device, where the third message includes one or more of the following information: Fifth information, used to indicate whether the first terminal device has a capability of supporting enhanced paging messages and / or the first notification message; an identifier of the first terminal device; The enhanced paging message and / or the first notification message are associated with the service type.

13. The method according to claim 12, characterized in that The method further comprises: The first network element sends a fourth message to the first terminal device, where the fourth message includes one or more of the following information: Sixth information, used to indicate whether to allow transmission of the enhanced paging message and / or the first notification message; an identifier of the first terminal device; A service type that allows use of the enhanced paging message and / or the first notification message.

14. The method according to claim 13, characterized in that The fourth message is determined based on local configuration information and / or network capabilities of the first network element.

15. The method according to any one of claims 1 to 14, characterized in that The first network element is used for mobility management.

16. A wireless communication method, characterized in that: include: The first access network device sends a first notification message or a first paging message to the first terminal device; The first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; The first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

17. The method according to claim 16, characterized in that The first notification message is triggered based on a first condition, where the first condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; receiving a first message sent by a first network element in the core network, where the first message is used to trigger the first notification message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type.

18. The method according to claim 17, wherein: The first message is the first notification message; or, The first message includes instruction information instructing the first access network device to send the first notification message.

19. The method according to claim 17 or 18, characterized in that Before the first access network device sends the first notification message or the first paging message to the first terminal device, the method further includes: The first access network device sends a second message to a first network element of the core network, where the second message includes one or more of the following: The first information is used to indicate a paging failure; an identifier of the first terminal device; Paging reason.

20. The method according to any one of claims 16 to 19, characterized in that The first notification message includes one or more of the following: an identifier of the first terminal device; area information associated with the first terminal device; The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message; Paging reason; Next paging time; an identifier of a protocol data unit (PDU) session associated with the first terminal device; The identifier of the second access network device.

21. The method according to any one of claims 16 to 20, characterized in that The first paging message is triggered based on a second condition, where the second condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; receiving a first message sent by a first network element of a core network, where the first message is used to trigger the first paging message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type; a differentiated services code point DSCP corresponding to the first service; a paging policy indication PPI corresponding to the first service; Allocation and Reservation Priority (ARP) corresponding to the first service; The fifth-generation service quality identifier 5QI corresponding to the first service; A quality of service flow identifier (QFI) corresponding to the first service; Indication information in the first downlink data packet.

22. The method according to claim 21, characterized in that The indication information is PPI.

23. The method according to any one of claims 16 to 22, characterized in that The first paging message includes one or more of the following: an identifier of the first terminal device; The service type of the first service that triggers paging; Paging reason.

24. A wireless communication method, characterized in that: include: The first terminal device receives a first notification message or a first paging message sent by the first access network device; The first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; The first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

25. The method according to claim 24, characterized in that The first notification message is triggered based on a first condition, where the first condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; The first access network device receives a first message sent by a first network element in the core network, where the first message is used to trigger the first notification message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type.

26. The method according to claim 25, characterized in that: The first message is the first notification message; or, The first message includes instruction information instructing the first access network device to send the first notification message.

27. The method according to any one of claims 24 to 26, characterized in that The first notification message includes one or more of the following: an identifier of the first terminal device; area information associated with the first terminal device; The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message; Paging reason; Next paging time; an identifier of a protocol data unit (PDU) session associated with the first terminal device; The identifier of the second access network device.

28. The method according to any one of claims 24 to 27, characterized in that The first paging message is triggered based on a second condition, where the second condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; The first access network device receives a first message sent by a first network element of a core network, where the first message is used to trigger the first paging message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type; a differentiated services code point DSCP corresponding to the first service; a paging policy indication PPI corresponding to the first service; Allocation and Reservation Priority (ARP) corresponding to the first service; The fifth-generation service quality identifier 5QI corresponding to the first service; The quality of service flow identifier QFI corresponding to the first service. Indication information in the first downlink data packet.

29. The method according to claim 28, characterized in that The indication information is PPI.

30. The method according to any one of claims 24 to 29, characterized in that The first paging message includes one or more of the following: an identifier of the first terminal device; The service type of the first service that triggers paging; Paging reason.

31. The method according to any one of claims 24 to 30, characterized in that The method further comprises: The first terminal device sends a third message to the first network element of the core network, where the third message includes one or more of the following information: Fifth information, used to indicate whether the first terminal device has a capability of supporting enhanced paging messages and / or the first notification message; an identifier of the first terminal device; The enhanced paging message and / or the first notification message are associated with the service type.

32. The method according to claim 31, characterized in that The method further comprises: The first terminal device receives a fourth message sent by the first network element, where the fourth message includes one or more of the following information: Sixth information, used to indicate whether to allow transmission of the enhanced paging message and / or the first notification message; an identifier of the first terminal device; A service type that allows use of the enhanced paging message and / or the first notification message.

33. The method according to claim 32, characterized in that The fourth message is determined based on local configuration information and / or network capabilities of the first network element.

34. The method according to any one of claims 31 to 33, characterized in that The first network element is used for mobility management.

35. A wireless communication method, characterized in that: include: The second network element of the core network sends third information to the first network element or the third network element, where the third information is used to trigger transmission of the enhanced paging message.

36. The method according to claim 35, characterized in that The third information is a paging policy indication PPI.

37. The method according to claim 36, wherein The third information is determined based on one or more of the following: The service type corresponding to the first downlink data; The priority corresponding to the first downlink data; The differentiated services code point DSCP corresponding to the first downlink data.

38. The method according to any one of claims 35 to 37, characterized in that: The second network element is used for session management; and / or The third network element is used to transmit data on the user plane; and / or The first network element is used for mobility management.

39. A wireless communication method, characterized in that: include: A third network element in the core network sends first downlink data to the first access network device, where the first downlink data includes third information, and the third information is used to trigger the first access network device to send an enhanced paging message.

40. The method according to claim 39, wherein The third information is a paging policy indication PPI.

41. The method according to claim 40, wherein The third information is determined based on one or more of the following: The service type corresponding to the first downlink data; Instruction information sent by the second network element of the core network; The priority corresponding to the first downlink data; The differentiated services code point DSCP corresponding to the first downlink data.

42. The method according to claim 41, wherein The second network element is used for session management.

43. The method according to any one of claims 39 to 42, characterized in that The third network element is used for transmitting data on the user plane.

44. A communication device, characterized in that The communication device is a first network element of a core network, and the communication device includes: A first communication module, configured to send a first message to a first access network device, where the first message is used to trigger the first access network device to send a first notification message or a first paging message; The first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; The first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

45. The communication device according to claim 44, characterized in that The first message is used to trigger the first access network device to send the first notification message.

46. The communication device according to claim 45, characterized in that The first message is triggered based on a first condition, where the first condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type.

47. The communication device according to claim 45 or 46, characterized in that The first communication module is further configured to: Before the first network element of the core network sends the first message to the first access network device, the first network element receives a second message from the first access network device or the second access network device, where the second message includes one or more of the following: First information, used to indicate that paging of the first terminal device has failed; an identifier of the first terminal device; Paging reason.

48. The communication device according to any one of claims 45 to 47, characterized in that The first message includes one or more of the following: an identifier of the first terminal device; area information associated with the first terminal device; The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message; Paging reason; Next paging time; an identifier of a protocol data unit (PDU) session associated with the first terminal device; The identifier of the second access network device.

49. The communication device according to any one of claims 45 to 48, characterized in that: The first message is the first notification message; or, The first message includes information instructing the first access network device to send the first notification message.

50. The communication device according to claim 44, wherein The first message is used to trigger the first access network device to send the first paging message.

51. The communication device according to claim 50, characterized in that The first message is triggered based on a second condition, where the second condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type; third information sent by a second network element of the core network, where the third information is used to instruct the first network element to send an enhanced paging message; a differentiated services code point DSCP corresponding to the first service; a paging policy indication PPI corresponding to the first service; Allocation and Reservation Priority (ARP) corresponding to the first service; The fifth-generation service quality identifier 5QI corresponding to the first service; The quality of service flow identifier QFI corresponding to the first service.

52. The communication device according to claim 51, wherein The second network element is used for session management.

53. The communication device according to any one of claims 50 to 52, characterized in that The first message includes one or more of the following: an identifier of the first terminal device; The service type of the first service that triggers paging; fourth information, used to instruct the first access network device to send an enhanced paging message; area information associated with the first terminal device; the paging priority corresponding to the first service; Paging reason.

54. The communication device according to any one of claims 50 to 53, characterized in that The first message is an enhanced paging message.

55. The communication device according to any one of claims 44 to 54, characterized in that The first communication module is further configured to: Receive a third message sent by the first terminal device, where the third message includes one or more of the following information: Fifth information, used to indicate whether the first terminal device has a capability of supporting enhanced paging messages and / or the first notification message; an identifier of the first terminal device; The enhanced paging message and / or the first notification message are associated with the service type.

56. The communication device according to claim 55, characterized in that The first communication module is further configured to: Send a fourth message to the first terminal device, where the fourth message includes one or more of the following information: Sixth information, used to indicate whether to allow transmission of the enhanced paging message and / or the first notification message; an identifier of the first terminal device; A service type that allows use of the enhanced paging message and / or the first notification message.

57. The communication device according to claim 56, characterized in that The fourth message is determined based on local configuration information and / or network capabilities of the first network element.

58. The communication device according to any one of claims 44 to 57, characterized in that The first network element is used for mobility management.

59. A communication device, characterized in that The communication device is a first access network device, and the communication device includes: A first communication module, configured to send a first notification message or a first paging message to a first terminal device; The first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; The first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

60. The communication device according to claim 59, wherein The first notification message is triggered based on a first condition, where the first condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; receiving a first message sent by a first network element in the core network, where the first message is used to trigger the first notification message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type.

61. The communication device according to claim 60, characterized in that: The first message is the first notification message; or, The first message includes instruction information instructing the first access network device to send the first notification message.

62. The communication device according to claim 60 or 61, characterized in that Before the first access network device sends the first notification message or the first paging message to the first terminal device, the communication device further includes: The first access network device sends a second message to a first network element of the core network, where the second message includes one or more of the following: The first information is used to indicate a paging failure; an identifier of the first terminal device; Paging reason.

63. The communication device according to any one of claims 59 to 62, characterized in that The first notification message includes one or more of the following: an identifier of the first terminal device; area information associated with the first terminal device; The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message; Paging reason; Next paging time; an identifier of a protocol data unit (PDU) session associated with the first terminal device; The identifier of the second access network device.

64. The communication device according to any one of claims 59 to 63, characterized in that The first paging message is triggered based on a second condition, where the second condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; receiving a first message sent by a first network element of a core network, where the first message is used to trigger the first paging message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type; a differentiated services code point DSCP corresponding to the first service; a paging policy indication PPI corresponding to the first service; Allocation and Reservation Priority (ARP) corresponding to the first service; The fifth-generation service quality identifier 5QI corresponding to the first service; A quality of service flow identifier (QFI) corresponding to the first service; Indication information in the first downlink data packet.

65. The communication device according to claim 64, characterized in that The indication information is PPI.

66. The communication device according to any one of claims 59 to 65, characterized in that The first paging message includes one or more of the following: an identifier of the first terminal device; The service type of the first service that triggers paging; Paging reason.

67. A communication device, characterized in that The communication device is a first terminal device, and the communication device includes: A first communication module is configured to receive a first notification message or a first paging message sent by a first access network device; The first notification message is used to notify the first terminal device to move from a current location to a location with better channel conditions to receive a paging message; The first paging message is an enhanced paging message, or the first paging message is a paging message sent when the second access network device fails to page the first terminal device.

68. The communication device according to claim 67, characterized in that The first notification message is triggered based on a first condition, where the first condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; The first access network device receives a first message sent by a first network element in the core network, where the first message is used to trigger the first notification message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type.

69. The communication device according to claim 68, characterized in that: The first message is the first notification message; or, The first message includes instruction information instructing the first access network device to send the first notification message.

70. The communication device according to any one of claims 67 to 69, characterized in that The first notification message includes one or more of the following: an identifier of the first terminal device; area information associated with the first terminal device; The second information is used to notify the first terminal device to move from the current location to a location with better channel conditions to receive the paging message; Paging reason; Next paging time; an identifier of a protocol data unit (PDU) session associated with the first terminal device; The identifier of the second access network device.

71. The communication device according to any one of claims 67 to 70, characterized in that The first paging message is triggered based on a second condition, where the second condition is associated with one or more of the following: The first access network device or the second access network device fails to page the first terminal device; The first access network device receives a first message sent by a first network element of a core network, where the first message is used to trigger the first paging message; capabilities of the first terminal device; Network capabilities; The service type of the first service that triggers paging; the priority of the first terminal device; The priority of the service type; a differentiated services code point DSCP corresponding to the first service; a paging policy indication PPI corresponding to the first service; Allocation and Reservation Priority (ARP) corresponding to the first service; The fifth-generation service quality identifier 5QI corresponding to the first service; A quality of service flow identifier (QFI) corresponding to the first service; Indication information in the first downlink data packet.

72. The communication device according to claim 71, characterized in that The indication information is PPI.

73. The communication device according to any one of claims 67 to 72, characterized in that The first paging message includes one or more of the following: an identifier of the first terminal device; The service type of the first service that triggers paging; Paging reason.

74. The communication device according to any one of claims 67 to 73, characterized in that The first communication module is further configured to: Send a third message to the first network element of the core network, where the third message includes one or more of the following information: Fifth information, used to indicate whether the first terminal device has a capability of supporting enhanced paging messages and / or the first notification message; an identifier of the first terminal device; The enhanced paging message and / or the first notification message are associated with a service type.

75. The communication device according to claim 74, characterized in that The first communication module is further configured to: Receive a fourth message sent by the first network element, where the fourth message includes one or more of the following information: Sixth information, used to indicate whether to allow transmission of the enhanced paging message and / or the first notification message; an identifier of the first terminal device; A service type that allows use of the enhanced paging message and / or the first notification message.

76. The communication device according to claim 75, characterized in that The fourth message is determined based on local configuration information and / or network capabilities of the first network element.

77. The communication device according to any one of claims 74 to 76, characterized in that The first network element is used for mobility management.

78. A communication device, characterized in that The communication device is a second network element of the core network, and the communication device includes: The first communication module is configured to send third information to the first network element or the third network element, where the third information is used to trigger transmission of an enhanced paging message.

79. The communication device according to claim 78, characterized in that The third information is a paging policy indication PPI.

80. The communication device according to claim 79, wherein The third information is determined based on one or more of the following: The service type corresponding to the first downlink data; The priority corresponding to the first downlink data; The differentiated services code point DSCP corresponding to the first downlink data.

81. The communication device according to any one of claims 78 to 80, characterized in that: The second network element is used for session management; and / or The third network element is used to transmit data on the user plane; and / or The first network element is used for mobility management.

82. A communication device, characterized in that The communication device is a third network element in the core network, and the communication device includes: The first communication module is configured to send first downlink data to a first access network device, where the first downlink data includes third information, and the third information is configured to trigger the first access network device to send an enhanced paging message.

83. The communication device according to claim 82, characterized in that The third information is a paging policy indication PPI.

84. The communication device according to claim 83, characterized in that The third information is determined based on one or more of the following: The service type corresponding to the first downlink data; Instruction information sent by the second network element of the core network; The priority corresponding to the first downlink data; The differentiated services code point DSCP corresponding to the first downlink data.

85. The communication device according to claim 84, characterized in that The second network element is used for session management.

86. The communication device according to any one of claims 82 to 85, characterized in that The third network element is used for transmitting data on the user plane.

87. A communication device, characterized in that The system comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 1 to 43.

88. A chip, characterized in that The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 43.

89. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 43.

90. A computer program product, characterized in that A program is included, the program causing a computer to execute the method according to any one of claims 1 to 43.

91. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 43.

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