Paging monitoring method, terminal and service base station

Abstract

The invention discloses a paging monitoring method, a terminal and a service base station, and belongs to the technical field of communication, and the paging monitoring method comprises the steps that relay UE receives paging auxiliary information; the relay UE determines whether the relay UE itself belongs to the first relay UE, and the paging auxiliary information is used for assisting the first relay UE in monitoring a paging message for the remote UE; when determining that the relay UE belongs to the first relay UE, the relay UE monitors the paging message, and forwards the monitored paging message to the remote UE; or under the condition that the relay UE determines that the relay UE does not belong to the first relay UE, the relay UE forwards the paging auxiliary information to the last-hop relay UE of the relay UE. And the first relay UE monitors the paging message instead of the remote UE, so that the problem that the relay UE in a state without network signal coverage cannot monitor the paging message instead of the remote UE and the problem that the remote UE in a state without network signal coverage cannot monitor own paging message are solved.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a paging monitoring method, a terminal, and a serving base station. Background Art

[0002] In the single-hop L2 UE-to-Network (U2N) relay network of R17 / R18, after the remote User Equipment (UE) establishes a PC5 RRC (Proximity Communication Radio Resource Control) connection with the relay UE, the remote UE can send a paging monitoring request to the relay UE, so that the relay UE helps the remote UE monitor paging signals from the serving base station and forwards the received paging signals to the target remote UE.

[0003] However, when the relay UE is in an Out Of Coverage (OOC) state, the relay UE cannot monitor paging messages on behalf of the remote UE, resulting in the remote UE being unable to receive its own paging messages. Therefore, the existing paging mechanism needs to be improved. Summary of the Invention

[0004] Embodiments of this application provide a paging monitoring method, a terminal, and a serving base station, which can solve the problem that a relay UE in an out-of-network-coverage state cannot monitor paging messages on behalf of a remote UE and the problem that a remote UE in an out-of-network-coverage state cannot monitor its own paging messages.

[0005] In a first aspect, a paging monitoring method is provided, which is performed by a relay terminal. The method includes:

[0006] The relay UE receives paging assistance information;

[0007] The relay UE determines whether it belongs to a first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count from the remote UE. The paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE;

[0008] When the relay UE determines that it belongs to the first relay UE, it monitors paging messages and forwards the monitored paging messages to the remote UE; or

[0009] When the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE.

[0010] Second aspect, a paging monitoring method is provided, and the method includes:

[0011] When a first relay UE receives paging assistance information from a first sub-UE sent by a remote UE, record the corresponding relationship between the identifier of the remote UE and the identifier of the first sub-UE, where the first sub-UE is the next-hop relay UE of the first relay UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE to monitor paging messages for the remote UE;

[0012] The first relay UE forwards the paging message monitored by the first relay UE to the first sub-UE according to the corresponding relationship.

[0013] Third aspect, a paging monitoring method is provided, and the method includes:

[0014] When a second relay UE receives paging assistance information from a second sub-UE sent by the remote UE, record the corresponding relationship between the identifier of the remote UE and the identifier of the second sub-UE, where the second sub-UE is the next-hop relay UE of the second relay UE, and the second relay UE is a relay UE between the first relay UE and the remote UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE to monitor paging messages for the remote UE;

[0015] The second relay UE forwards the received paging message to the second sub-UE according to the corresponding relationship.

[0016] Fourth aspect, a paging monitoring method is provided, and the method includes:

[0017] The remote UE sends paging assistance information;

[0018] The remote UE receives the paging message forwarded by the first relay UE, where the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE to monitor paging messages for the remote UE.

[0019] Fifth aspect, a paging monitoring method is provided, and the method includes:

[0020] The serving base station receives paging assistance information from a remote UE forwarded by a first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE, and the downstream UEs of the first relay UE at least include: the remote UE accessing the serving base station through the first relay UE;

[0021] The serving base station sends a paging message containing the identifier of any downstream UE of the first relay UE to the first relay UE.

[0022] In a sixth aspect, a paging monitoring method is provided, and the method includes:

[0023] The serving base station receives paging assistance information sent by a remote UE;

[0024] The serving base station sends the paging assistance information to a first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE.

[0025] In a seventh aspect, a paging monitoring device is provided, and the device includes:

[0026] A first receiving module, configured to receive paging assistance information;

[0027] A first determination module, configured to determine whether itself belongs to a first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE;

[0028] A first auxiliary monitoring module, configured to, when determining that itself belongs to the first relay UE, monitor paging messages and forward the monitored paging messages to the remote UE; or

[0029] A first forwarding module, configured to, when determining that itself does not belong to the first relay UE, forward the paging assistance information to the previous-hop relay UE of the relay UE.

[0030] In an eighth aspect, a paging monitoring device is provided, and the device includes:

[0031] A first recording module, configured to record the correspondence between the identifier of the remote UE and the identifier of the first sub-UE when the first relay UE receives paging assistance information sent by the first sub-UE from the remote UE, where the first sub-UE is the next-hop relay UE of the first relay UE; the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count distance from the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE.

[0032] A first forwarding module, configured to forward the paging message listened by the first relay UE to the first sub-UE according to the correspondence.

[0033] In a ninth aspect, a paging listening device is provided, and the device includes:

[0034] A second recording module, configured to record the correspondence between the identifier of the remote UE and the identifier of the second sub-UE when the second relay UE receives paging assistance information sent by the second sub-UE from the remote UE, where the second sub-UE is the next-hop relay UE of the second relay UE, and the second relay UE is a relay UE between the first relay UE and the remote UE; the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count distance from the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE.

[0035] A third forwarding module, configured to forward the received paging message to the second sub-UE according to the correspondence.

[0036] In a tenth aspect, a paging listening device is provided, and the device includes:

[0037] A third sending module, configured to send paging assistance information.

[0038] A second receiving module, configured to receive the paging message forwarded by the first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count distance from the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE.

[0039] In an eleventh aspect, a paging listening device is provided, and the device includes:

[0040] A sixth receiving module, configured to receive paging assistance information from a remote UE forwarded by a first relay UE, where the first relay UE is a relay UE at any number of transmission hops away from the remote UE within the network coverage area of the serving base station of the remote UE, and the downstream UEs of the first relay UE at least include: the remote UE accessing the serving base station through the first relay UE;

[0041] A fourth transmitting module, configured to send a paging message containing the identifier of any downstream UE of the first relay UE to the first relay UE.

[0042] In a twelfth aspect, a paging monitoring device is provided, and the device includes:

[0043] A seventh receiving module, configured to receive paging assistance information sent by a remote UE;

[0044] A fifth transmitting module, configured to send the paging assistance information to a first relay UE, where the first relay UE is a relay UE at any number of transmission hops away from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE.

[0045] In a thirteenth aspect, a relay terminal is provided, and the relay terminal includes a processor and a memory. The memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect, the second aspect, or the third aspect are implemented.

[0046] In a fourteenth aspect, a remote terminal is provided, and the terminal includes a processor and a memory. The memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the fourth aspect are implemented.

[0047] In a fifteenth aspect, a serving base station is provided, and the serving base station includes a processor and a memory. The memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the fifth aspect are implemented, or the steps of the method described in the sixth aspect are implemented.

[0048] In a sixteenth aspect, a readable storage medium is provided, and a program or instruction is stored on the readable storage medium. When the program or instruction is executed by a processor, the steps of the method described in any one of the first aspect to the sixth aspect are implemented.

[0049] In an embodiment of the present application, a relay UE receives paging assistance information, determines whether it belongs to a first relay UE, listens for a paging message when the relay UE determines that it belongs to the first relay UE, and forwards the listened paging message to a remote UE; or, when the relay UE determines that it does not belong to the first relay UE, forwards the paging assistance information to the previous-hop relay UE of the relay UE. Among them, the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE at any number of transmission hops from the remote UE, and the paging assistance information is used to assist the first relay UE in listening for the paging message for the remote UE. The first relay UE is a relay UE within the network coverage area of the serving base station at any number of transmission hops from the remote UE, that is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, and a relay UE having a radio resource control (RRC) connection with the serving base station. Having the first relay UE listen for the paging message on behalf of the remote UE solves the problem that a relay UE in a state of no network signal coverage cannot listen for the paging message on behalf of the remote UE and the problem that a remote UE in a state of no network signal coverage cannot listen for its own paging message. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

[0051] Figure 2 is a schematic diagram of a single-hop L2 U2N relay network in an embodiment of the present application;

[0052] Figure 3 is a schematic diagram of a multi-hop L2 U2N relay network in an embodiment of the present application;

[0053] Figure 4 is a schematic definition diagram of a multi-hop L2 U2N relay network in an embodiment of the present application;

[0054] Figure 5 is a flowchart of a paging listening method applied to a relay terminal in an embodiment of the present application;

[0055] Figure 6 is another schematic diagram of a multi-hop L2 U2N relay network in an embodiment of the present application;

[0056] Figure 7 is a flowchart of a paging listening method applied to a first relay terminal in an embodiment of the present application;

[0057] Figure 8 is a flowchart of a paging listening method applied to a second relay terminal in an embodiment of the present application;

[0058] Figure 9It is a flowchart of a paging monitoring method applied to a remote terminal in an embodiment of the present application;

[0059] Figure 10 It is a flowchart of a paging monitoring method applied to a serving base station in an embodiment of the present application;

[0060] Figure 11 It is a flowchart of another paging monitoring method applied to a serving base station in an embodiment of the present application;

[0061] Figure 12 It is a schematic diagram of a paging monitoring device applied to a relay terminal in an embodiment of the present application;

[0062] Figure 13 It is a flowchart of a paging monitoring device applied to a first relay terminal in an embodiment of the present application;

[0063] Figure 14 It is a flowchart of a paging monitoring device applied to a second relay terminal in an embodiment of the present application;

[0064] Figure 15 It is a flowchart of a paging monitoring device applied to a remote terminal in an embodiment of the present application;

[0065] Figure 16 It is a flowchart of a paging monitoring device applied to a serving base station in an embodiment of the present application;

[0066] Figure 17 It is a flowchart of another paging monitoring device applied to a serving base station in an embodiment of the present application;

[0067] Figure 18 It is a schematic diagram of the structure of a communication device in an embodiment of the present application;

[0068] Figure 19 It is a schematic diagram of the structure of a terminal in an embodiment of the present application;

[0069] Figure 20 It is a schematic diagram of the structure of a serving base station in an embodiment of the present application. Detailed implementation manners

[0070] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0071] The terms "first", "second", etc. in this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "or" in this application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0072] The term "indication" in this application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly informs the receiver of specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0073] It should be noted that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, and can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and uses NR terms in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th generation (6 thGeneration, 6G) communication system.

[0074] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc., which are terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP), or a wireless fidelity (WiFi) node, etc.Among them, the base station may be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0075] The core network device may include but is not limited to at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.

[0076] To facilitate the understanding of the technical solutions provided in this application, the main technical concepts involved in the embodiments of this application are briefly described below.

[0077] Single-hop L2 U2N relay wireless network:

[0078] A sidelink refers to the wireless link between UEs in NR / LTE. Two UEs can achieve direct data transmission between them through the sidelink. The wireless link between sidelinks is also called the PC5 link and runs the PC5 protocol. In 3GPP Rel-17, the UE is used to provide relay services between the UE and the network, such as Figure 2As shown in the figure, the UE that provides relay services is called a relay UE (i.e., a relay UE), and the UE that receives relay services is called a remote UE (i.e., a remote UE). The link between the relay UE and the remote UE is a PC5 link that runs the sidelink interface protocol, and the link between the relay UE and the base station is a Uu link that runs the Uu link protocol.

[0079] The control plane of the sidelink radio interface has a PC5 RRC protocol that runs on top of the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer, and at the bottom are the Media Access Control (MAC) layer and the physical layer. The user plane of the sidelink radio interface from top to bottom includes the Service Data Adaptation Protocol (SDAP), PDCP, RLC, MAC, and the physical layer.

[0080] The sidelink U2N relay includes Layer 2 (L2) U2N relay and Layer 3 (L3) U2N relay. The L2 U2N relay means that the relay UE forwards the data of the remote UE at layer 2, and the L3 U2N relay means that the relay UE forwards the data of the remote UE at layer 3. The L2 U2N relay introduces a sidelink relay adaptation protocol (SRAP) layer for data routing. This layer carries the local identification information (local UE ID) of the remote UE and the radio bearer identification information between the remote UE and the base station. Based on this, the relay UE maps the input logical channel to the output logical channel for the forwarded data. For the uplink protocol data unit (PDU) forwarded by the relay UE to the base station, the remote UE adds an SRAP header to the PDU to generate an SRAP PDU. After receiving the SRAP PDU, the relay UE forwards it according to the SRAP header. After receiving the SRAP PDU, the base station determines the corresponding PDCP entity according to the information carried by the SRAP, and submits the corresponding service data unit (SDU) to the PDCP entity after removing the SRAP header. For the downlink PDU forwarded by the relay UE to the remote UE, the base station adds an SRAP header to the PDU to generate an SRAP PDU. After receiving the SRAP PDU, the relay UE forwards it according to the SRAP header. After receiving the SRAP PDU, the remote UE determines the corresponding PDCP entity according to the information carried by the SRAP, and submits the corresponding SDU to the PDCP entity after removing the SRAP header.

[0081] Paging mechanism in a single-hop L2 U2N relay network:

[0082] In a single-hop L2 U2N relay wireless network, when the remote UE wants to enter the radio resource control idle state (RRC_IDLE) or the radio resource control inactive state (RRC_INACTIVE), it can send paging assistance information to the relay UE, requesting the relay UE to listen on behalf of the remote UE for paging messages belonging to the remote UE and forward the received paging messages belonging to the remote UE to the remote UE. Among them, the paging assistance information includes the identification information of the remote UE and the configuration information for determining the paging listening time-frequency window of the remote UE (for example, the discontinuous reception DRX configuration information for determining the time-frequency position of the sequential information transmission).

[0083] When the remote UE is about to enter the RRC_IDLE state or before entering the RRC_IDLE state, it is necessary to send the terminal 5G identifier (ng-5G-S-TMSI) and the DRX configuration for listening to paging messages to the relay UE; or when the remote UE is about to enter the RRC_INACTIVE state or before entering the RRC_INACTIVE state, it is necessary to send the ng-5G-S-TMSI, the radio network temporary identifier (fullI-RNTI), and the DRX configuration for listening to paging messages to the relay UE. If the relay UE is in the RRC_IDLE state or the RRC_INACTIVE state, the relay UE determines the time-frequency resource location for listening to paging messages according to the received auxiliary information to help the remote UE listen to paging messages; if the relay UE is in the RRC_CONNECTED state, it uses the Sidelink UEInformationNR IE to report the identification information of the remote UE to the base station. When the base station needs to page these remote UEs, it sends the paging message to this relay UE, and the relay UE forwards the paging message to the remote UE.

[0084] Multi-hop L2 U2N Relay Wireless Network:

[0085] As Figure 3 shown, in a multi-hop L2 U2N relay wireless network, the remote UE can establish a wireless connection with the base station through multiple cascaded L2 U2N relay UEs. The uplink and downlink messages of the remote UE need to be relayed through multiple L2 U2N relay UEs to complete the transmission between the remote UE and the base station. There will still be an adaptation layer in the multi-hop L2 U2N relay wireless network to be used for guiding data forwarding and identifying end-to-end data packets. The packet header format and routing mechanism of the adaptation layer may make some necessary modifications based on the adaptation layer of the single-hop L2 U2N relay wireless network to meet the routing requirements of multiple networks.

[0086] In the single-hop L2 U2N relay network, the paging mechanism requires the access relay UE to be within the network signal coverage area because the remote UE sends paging auxiliary information to the access relay UE to let the access relay UE listen to paging messages on its behalf. However, in a multi-hop L2 U2N relay wireless network, there is one or more relay UEs between the remote UE and the serving base station, and there is a relay UE in the Out Of Coverage (OOC) state that cannot listen to paging messages for the remote UE it serves.

[0087] Therefore, an embodiment of the present application provides a paging monitoring method. The relay UE receives paging assistance information, determines whether it belongs to the first relay UE, monitors the paging message when the relay UE determines that it belongs to the first relay UE, and forwards the monitored paging message to the remote UE; or when the relay UE determines that it does not belong to the first relay UE, forwards the paging assistance information to the previous-hop relay UE of the relay UE. Among them, the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count from the remote UE. The paging assistance information is used to assist the first relay UE in monitoring the paging message for the remote UE. The first relay UE is a relay UE within the network coverage area of the serving base station and at any transmission hop count from the remote UE, that is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, a relay UE having a radio resource control (RRC) connection with the serving base station. The first relay UE monitors the paging message on behalf of the remote UE, solving the problem that a relay UE in a state of no network signal coverage cannot monitor the paging message on behalf of the remote UE and the problem that a remote UE in a state of no network signal coverage cannot monitor its own paging message.

[0088] In addition, considering that in a multi-hop L2 U2N relay network, there is one or more relay UEs between the remote UE and the serving base station, and the access relay UE may not be within the network coverage area. Therefore, the paging mechanism in a single-hop L2 U2N relay network is not applicable to the monitoring of paging messages of remote UEs in a multi-hop L2 U2N relay network. By adopting the technical solution provided by the embodiment of the present application, the first relay UE is a relay UE within the network coverage area of the serving base station and at any transmission hop count from the remote UE, that is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, a relay UE having a radio resource control (RRC) connection with the serving base station, which can monitor and forward paging messages for the remote UE, solving the problem that the access relay UE cannot monitor paging messages for the remote UE it serves.

[0089] The paging monitoring method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

[0090] For convenience of description, the multi-hop L2 U2N relay network is abbreviated as a multi-hop relay network, and the relay UEs in the multi-hop relay network are defined. As Figure 4 shown, relative to the remote UE, the relay UEs can be classified into the following categories:

[0091] (1) Host Relay UE: A relay UE that establishes a Uu connection with the serving base station or can establish a Uu connection with the serving base station to assist downstream UEs in forwarding data and signaling to the serving base station and to assist in forwarding data and signaling from the base station to downstream UEs.

[0092] (2) Access Relay UE: A relay that establishes a PC5 connection with a remote UE and assists the remote UE in forwarding uplink and downlink data and signaling is the access relay for that remote UE.

[0093] (3) Intermediate Relay UE: A relay UE that intervenes between the access relay and the host relay to assist the remote UE in forwarding data and signaling between the access relay and the host relay. In a multi-hop relay network, there can be 0, 1, or multiple intermediate relays between the access relay and the host relay of a remote relay.

[0094] (4) Downstream UE: All UEs that access the network through a relay UE become the downstream UEs of that relay UE.

[0095] (5) Upstream UE: A relay UE that forwards uplink and downlink data and signaling for a UE is the upstream UE of that UE.

[0096] (6) Sub-UE and Parent UE: The previous-hop relay UE of a relay UE is the parent UE of that relay UE, and the next-hop relay UE of a relay UE is the sub-UE of that relay UE. For example, if relay UE a establishes a PC5 connection with the previous-hop relay UE b to access the network, relay UE b is the parent UE of UE a, and relay UE a is the sub-UE of UE b.

[0097] It should be noted that Figure 4 The access relay UE shown has the identity of a remote UE relative to the intermediate relay UE; and the intermediate relay UE has the identity of a remote UE relative to the host relay UE, and so on. This will not be elaborated further in the following of this application. Similarly, for the sake of description, the single-hop L2 U2N relay network is simply referred to as the single-hop relay network. The paging message, paging signal, and paging information in the embodiments of this application have the same meaning. The remote terminal has the same meaning as the remote UE or remote user equipment.

[0098] In the first aspect of the embodiments of this application, a paging monitoring method is provided. This method is applied to a relay terminal. Refer to Figure 5 As shown, it is the flowchart of the implementation of a paging monitoring method provided by the embodiments of this application. This method may include the following steps:

[0099] Step S510: The relay UE receives paging assistance information;

[0100] Step S520: The relay UE determines whether it belongs to the first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop distance from the remote UE. The paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE;

[0101] Step S530: When the relay UE determines that it belongs to the first relay UE, it listens for paging messages and forwards the listened paging messages to the remote UE; or when the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE.

[0102] In the embodiments of this application, the relay UE and the remote UE may be Figure 1 the terminal device 11 in. For the examples of the terminal device 11, reference can be made to the previous text and will not be elaborated here.

[0103] Specifically, the relay UE receives the paging assistance information and determines whether it belongs to the first relay UE. Furthermore, when the relay UE determines that it belongs to the first relay UE, it listens for paging messages and forwards the listened paging messages to the remote UE to implement paging listening. Among them, the relay UE may be Figure 4 the access relay UE, the intermediate relay UE, and the host relay UE in. The distance from the remote UE at any transmission hop can be 1 hop or more than 1 hop. As Figure 4 shown, in a multi-hop relay network scenario, the first relay UE may be the host relay UE. At this time, the transmission hop distance of the first relay UE from the remote UE is 3 hops; if the intermediate relay UE is within the network coverage area of the serving base station of the remote UE, the first relay UE may be the intermediate relay UE. At this time, the transmission hop distance of the first relay UE from the remote UE is 2 hops; if the access relay UE is within the network coverage area of the serving base station of the remote UE, the first relay UE may also be the access relay UE. At this time, the transmission hop distance of the first relay UE from the remote UE is 1 hop.

[0104] When the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE. Exemplarily, as Figure 3 shown, if the relay UE1 determines that it does not belong to the first relay UE, it forwards the paging assistance information to the relay UE2 (the relay UE2 is the previous-hop relay of the relay UE1); if the relay UE2 determines that it does not belong to the first relay UE, it forwards the paging assistance information to the relay UE3 (the relay UE3 is the previous-hop relay of the relay UE2).

[0105] It can be understood that the paging monitoring method provided in the embodiments of the present application is also applicable to a network where there is only one-hop PC5 connection in the backhaul link of a multi-hop relay network. For a scenario where there is only one-hop PC5 (i.e., there is only one relay UE on the backhaul link) in the backhaul link of a multi-hop relay network, for the remote UE, its first relay UE, host relay UE, and access relay UE are the same relay UE, and the signaling process of the paging monitoring method described in the present invention is run between the relay UE and the remote UE.

[0106] In the embodiments of the present application, the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station. That is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, and a relay UE having a radio resource control (RRC) connection with the serving base station. The first relay UE listens for paging messages on behalf of the remote UE, solving the problem that a relay UE in a state without network signal coverage cannot listen for paging messages on behalf of the remote UE and the problem that a remote UE in a state without network signal coverage cannot listen for its own paging messages.

[0107] In a specific implementation manner, the first relay UE includes at least one of the following:

[0108] Item A-1: The host relay UE, where the host relay UE is: a relay UE in a state directly connected to the serving base station, or a relay UE having the condition to establish a direct connection with the serving base station;

[0109] Item A-2: A relay UE on the backhaul path between the serving base station and the remote UE that meets the paging message listening condition, where the paging message listening condition includes at least one of the following:

[0110] Item B-1: The relay UE enters the network coverage area of the serving base station;

[0111] Item B-2: The relay UE is within the network coverage area of the serving base station and changes from a non-host relay UE to a host relay UE;

[0112] Item B-3: The relay UE enters the radio resource control connected state (RRC_CONNECTED state).

[0113] Specifically, for item A-1, a relay UE in a state of being directly connected to the serving base station refers to a relay UE that has established Uu link communication with the base station. A relay UE that meets the condition of establishing a direct connection with the serving base station means that the relay UE is within the network coverage area of the serving base station but is not currently connected to the serving base station. For example, if the downstream of a certain host relay UE includes an intermediate relay UE and a remote UE, and since the remote UE has no traffic, the host relay UE disconnects from the serving base station for energy conservation. At this time, although the host relay UE is not connected to the serving base station, it meets the condition of establishing a direct connection with the serving base station. By way of example, Figure 6 both relay UE a and relay UE d in

[0114] For item A-2, a relay UE on the backhaul path between the serving base station and the remote UE refers to an intermediate relay UE between the remote UE and the host relay UE within the network coverage area of the serving base station. As Figure 6 shown, relay UE c and relay UE b are relay UEs on the backhaul path between the serving base station and remote UE1. If relay UE c and relay UE b meet the condition of paging message monitoring, then relay UE c and relay UE b can also act as the first relay UE to replace the remote UE to monitor paging messages.

[0115] For item B-1, the relay UE enters the network coverage area of the serving base station. A relay UE within the network coverage of the serving base station can replace the remote UE to monitor paging messages. Therefore, when a relay UE enters the network coverage area of the serving base station, the relay UE also meets the condition of paging message monitoring. As Figure 6 shown, if relay UE c enters the network coverage area of the serving base station, then relay UE c can be used to replace the remote UE to monitor paging messages.

[0116] For item B-2, the relay UE is within the network coverage area of the serving base station and changes from a non-host relay UE to a host relay UE. As Figure 6 shown, if relay UE b disconnects the PC5 link with relay UE a, then UE b can be directly connected to the serving base station. At this time, relay UE b becomes a host relay UE to replace the remote UE to monitor paging messages.

[0117] For item B-3, the relay UE enters the Radio Resource Control Connected state (RRC_CONNECTED state), indicating that the relay UE can communicate with the serving base station. Therefore, when the relay UE enters the RRC_CONNECTED state, it can replace the remote UE to monitor paging messages.

[0118] In a specific implementation, the relay UE on the backhaul path between the serving base station and the remote UE that meets the paging message listening condition includes at least one of the following:

[0119] An access relay UE, where the access relay UE is a relay UE directly wirelessly connected to the remote UE;

[0120] An intermediate relay UE, where the intermediate relay UE is a relay UE between the access UE and the host relay UE.

[0121] As Figure 6 shown, relay UE c is directly wirelessly connected to remote UE1, and relay UE e is directly wirelessly connected to remote UE2. Therefore, both relay UE e and relay UE e belong to access relay UEs. Relay UE b between relay UE e (access relay UE) and relay UE a (host relay UE) is an intermediate relay UE.

[0122] In a specific implementation, the paging assistance information includes at least one of the following:

[0123] Item H-1: The paging identifier of the remote UE;

[0124] Item H-2: The terminal 5G identifier ng-5G-S-TMSI;

[0125] Item H-3: The inactive state - radio network temporary identifier fullI-RNTI;

[0126] Item H-4: The discontinuous reception DRX configuration for listening to paging messages;

[0127] Item H-5: The transmission hop count of the remote UE from the first relay UE.

[0128] In the embodiments of the present application, when the remote UE is to enter the RRC_IDLE state, the ng-5G-S-TMSI and the DRX configuration for listening to paging messages are sent to the first relay UE as paging assistance information, so that the first relay UE listens to paging messages on behalf of the remote UE. When the remote UE is to enter the RRC_INACTIVE state, the ng-5G-S-TMSI, fullI-RNTI, and the DRX configuration for listening to paging messages are sent to the first relay UE as paging assistance information, so that the first relay UE listens to paging messages on behalf of the remote UE.

[0129] In a specific implementation, the paging assistance information is sent by the remote UE. The remote UE sending the paging assistance information includes at least one of the following:

[0130] Item C-1: The remote UE sends paging assistance information to the first relay UE through a PC5 RRC connection with the first relay UE;

[0131] Item C-2: The remote UE sends paging assistance information to the first parent UE through a PC5 RRC connection with the first parent UE, so that the first parent UE forwards the paging assistance information hop by hop to the first relay UE. The first parent UE is the previous-hop relay UE of the remote UE;

[0132] Item C-3: The remote UE sends paging assistance information to the serving base station, so that the serving base station sends the paging assistance information to the first relay UE.

[0133] In the embodiment of the present application, in the paging assistance signal sending method of Item C-1, the remote UE establishes a PC5 RRC connection with the first relay through a discovery process, and then sends paging assistance information to the first relay UE through the PC5 RRC connection.

[0134] In the paging assistance signal sending method of Item C-2, the remote UE only needs to know the access relay UE. The remote UE first sends the paging assistance information to its access relay UE, and then its access relay UE forwards the paging message to its parent relay UE, and its parent relay UE then forwards the paging message upward until the paging message reaches the first relay UE. As Figure 6 shown, the remote UE1 first sends the paging assistance information to relay UE e (relay UE e is the access relay UE of remote UE1), and then relay UE e forwards the paging message to relay UE b (relay UE b is the parent relay UE of relay UE e), and relay UE b then forwards the paging message to relay UE a (relay UE a is the first relay UE).

[0135] In the paging assistance signal sending method of Item C-3, when there is an RRC connection between the remote UE and the serving base station, the paging assistance signal is sent to the serving base station, and the serving base station sends the paging assistance signal to the first relay UE, so that the first relay UE listens for paging messages on behalf of the remote UE based on the paging assistance information.

[0136] In a specific implementation manner, when the relay UE determines that it belongs to the first relay UE and the paging message monitored by the relay UE contains the identifier of the remote UE, the relay UE listens for the paging message on behalf of the remote UE and forwards the monitored paging message to the remote UE; specifically, the relay UE forwards the monitored paging message to the remote UE in at least one of the following ways:

[0137] Item D-1: The relay UE forwards the paging message it monitors to the remote UE through the PC5 RRC connection with the remote UE;

[0138] Item D-2: The relay UE forwards the paging message it monitors to the first sub-UE through the PC5 RRC connection with the first sub-UE, so as to forward the paging message monitored by the relay UE to the remote UE hop by hop through the first sub-UE. The first sub-UE is the next-hop relay UE of the relay UE.

[0139] In the embodiments of the present application, the relay UE can determine the remote UE that receives the paging message according to the identifier of the remote UE included in the paging message, so as to forward the paging message to the corresponding remote UE. Specifically, the paging message forwarding method in Item D-1 corresponds to Item C-1 above. If the paging assistance information is forwarded through the PC5 RRC connection between the remote UE and the relay UE, the relay UE also forwards the paging message to the remote UE according to the PC5 RRC connection with the remote UE. Among them, the paging message can be carried by a container in the PC5 RRC message.

[0140] The paging message forwarding method in Item D-2 corresponds to Item C-2 above. If the paging assistance information is forwarded step by step upward through the PC5 RRC of each hop until the paging assistance information of the remote UE reaches the first relay UE, the first relay UE forwards the monitored paging message to the remote UE hop by hop through the PC5 RRC connection according to the same forwarding path.

[0141] In specific implementation, when the remote UE sends paging assistance information through the paging assistance signal sending method in Item C-3 above, after the first relay UE monitors the paging message, it can forward the paging message to the remote UE based on any one of the methods in Items D-1 and D-2 above.

[0142] Correspondingly, the remote UE receives the paging message forwarded by the first relay UE in at least one of the following ways:

[0143] Item E-1: The remote UE receives the paging message forwarded by the first relay UE, and the paging message is transmitted through the PC5 RRC connection between the first relay UE and the remote UE;

[0144] Item E-2: The remote UE receives the paging message forwarded by the previous-hop relay UE of the remote UE, and the paging message is transmitted hop by hop through each hop of the PC5 RRC connection between the remote UE and the first relay UE.

[0145] In the embodiments of the present application, the manner in which the remote UE receives the paging message through item E-1 corresponds to the forwarding manner of the paging message in item D-1 above, and the manner in which the remote UE receives the paging message through item E-2 corresponds to the forwarding manner of the paging message in item D-2 above.

[0146] In a specific embodiment, in order to forward the paging message to the remote UE, the first relay UE performs the following steps:

[0147] When the first relay UE receives paging assistance information from the remote UE sent by the first sub-UE, record the corresponding relationship between the identifier of the remote UE and the identifier of the first sub-UE, where the first sub-UE is the next-hop relay UE of the first relay UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE;

[0148] The first relay UE forwards the paging message it monitors to the first sub-UE according to the corresponding relationship.

[0149] In the embodiments of the present application, when the first relay UE receives paging assistance information through the sub-UE, it records the corresponding relationship between the paging identifier of the remote UE and the identifier of the sub-UE. Subsequently, when forwarding the paging message corresponding to the remote UE, the first relay UE forwards the paging message to the corresponding sub-UE according to the recorded corresponding relationship. After the sub-UE receives the paging message, the sub-UE performs the execution steps of the following second relay UE, thereby realizing the forwarding of the paging message based on accurate routing.

[0150] Correspondingly, in order to forward the paging message to the remote UE, the second relay UE performs the following steps:

[0151] When the second relay UE receives paging assistance information from the remote UE sent by the second sub-UE, record the corresponding relationship between the identifier of the remote UE and the identifier of the second sub-UE, where the second sub-UE is the next-hop relay UE of the second relay UE, and the second relay UE is a relay UE between the first relay UE and the remote UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE;

[0152] The second relay UE forwards the received paging message to the second sub-UE according to the corresponding relationship.

[0153] In an embodiment of the present application, the second relay UE may be an access relay UE or an intermediate relay UE. When the second relay UE receives paging assistance information through a sub-UE, it records the correspondence between the paging identifier of the remote UE and the identifier of the sub-UE. When forwarding the paging message corresponding to the remote UE, the second relay UE forwards the paging message to the corresponding sub-UE according to the recorded correspondence, so as to implement the forwarding of the paging message based on an accurate route.

[0154] As Figure 3 shown, Relay UE3 is the first relay UE, and Relay UE1 and Relay UE2 are the second relay UEs. If the remote UE sequentially sends paging assistance information to Relay UE3 through Relay UE1 and Relay UE2, then Relay UE1 records the correspondence between the paging identifier of the remote UE and the identifier of its sub-UE (the remote UE), Relay UE2 records the correspondence between the paging identifier of the remote UE and the identifier of its sub-UE (Relay UE1), and Relay UE3 records the correspondence between the paging identifier of the remote UE and the identifier of its sub-UE (Relay UE3). Furthermore, when forwarding the paging message, Relay UE3 forwards the paging message to Relay UE2 according to the correspondence, Relay UE2 forwards the paging message to Relay UE1 according to the correspondence, and Relay UE1 forwards the paging message to the remote UE according to the correspondence.

[0155] In a specific embodiment, in order to forward a paging message to a remote UE, the first relay UE performs the following steps:

[0156] When the paging message monitored by the first relay UE contains the identifier of the first downstream UE of the first relay UE, the first relay UE forwards the paging message monitored by the first relay UE to at least one next-hop relay UE of the first relay UE. The first downstream UE of the first relay UE includes: the UE that accesses the serving base station through the first relay UE.

[0157] Correspondingly, in order to forward a paging message to a remote UE, the second relay UE performs the following steps:

[0158] When the paging message received by the second relay UE contains the identifier of the first downstream UE of the second relay UE, the second relay UE forwards the received paging message to at least one next-hop relay UE of the second relay UE. The first downstream UE of the second relay UE includes: the UE that accesses the serving base station through the second relay UE.

[0159] In the embodiments of the present application, after the first relay UE monitors a paging signal containing the identifier of any downstream UE, it directly forwards the paging message to all next-hop relay UEs (i.e., the second relay UEs). When the second relay UE determines that the paging message contains the identifier of any of its downstream UEs, it forwards the paging message to all next-hop relay UEs of the second relay UE until the paging message is forwarded to the corresponding remote UE, thereby implementing a paging message forwarding based on broadcasting. In specific implementation, when the second relay UE receives a paging message forwarded by other relay UEs, and determines that the paging message contains the identifiers of other UEs in addition to the identifier of the second relay UE, the second relay UE forwards the received paging message to all next-hop relay UEs of the second relay UE.

[0160] In a specific implementation manner, a relay UE entering the RRC_CONNECTED state is used to replace the downstream relay UE to monitor the paging message, which specifically includes:

[0161] After the first relay UE enters the RRC_CONNECTED state, it reports the identifiers of at least one downstream UE of the first relay UE to the serving base station. The at least one downstream UE of the first relay UE includes: at least one UE accessing the serving base station through the first relay UE.

[0162] In specific implementation, if the first relay UE is in the RRC_CONNECTED state and the paging search space is configured in the local bandwidth part (BWP), the paging monitoring time-frequency window of the paging message of the remote UE is determined according to the paging assistance information to replace the remote UE to perform paging message monitoring. When the first relay UE is in the RRC_CONNECTED state, if the local BWP is not configured with a paging search space, paging message monitoring can be performed through dedicated RRC signaling.

[0163] In the embodiments of the present application, the first relay UE can be a host relay UE, an access relay UE, or an intermediate relay UE. After the first relay UE enters the RRC_CONNECTED state, the first relay UE has the condition to monitor the paging message and can replace the downstream UE to monitor the paging message. Specifically, the first relay UE reports the identifiers of all downstream UEs of the first relay UE to the serving base station, and then receives the paging message from the serving base station and forwards the paging message containing the paging identifier of the downstream UE to the downstream UE.

[0164] Further, the first relay UE also performs the following steps:

[0165] The first relay UE receives first indication information sent by the serving base station, and the first indication information is used to instruct the first relay UE to report the identifiers of at least one downstream UE of the first relay UE to the serving base station.

[0166] In the embodiments of the present application, the serving base station sends first indication information to the first relay UE, so that the first relay UE reports the identifiers of all downstream UEs of the first relay UE to replace the downstream relay UE to listen for paging messages. In one embodiment, the first relay UE may report the identifiers of all downstream UEs of the first relay UE to the serving base station after entering the RRC_CONNECTED state.

[0167] In a specific implementation manner, in order to be able to replace the downstream relay UE to listen for paging messages, at least one of the following is further included:

[0168] Item F-1: When the parent UE of the second relay UE undergoes a handover, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the parent UE after the handover, and the parent UE of the second relay UE is the previous-hop relay UE of the second relay UE;

[0169] Item F-2: When the host relay UE undergoes a handover, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the target host relay UE after the handover;

[0170] Item F-3: When the second relay UE switches from the host relay UE to the target host relay UE, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the target host relay UE.

[0171] In the embodiments of the present application, the second relay UE may be an access relay UE or an intermediate relay UE. Specifically, for Item F-1, when the parent UE of the second relay UE undergoes a handover, the handover parent UE is used to replace the downstream UE to listen for paging messages and forward the paging messages to the downstream relay UE. For Item F-2, when the host relay UE undergoes a handover, the identifiers of all downstream UEs of the second relay UE are sent to the target host relay UE after the handover, so that the target host relay UE after the handover replaces the downstream UE to listen for paging messages and forwards the paging messages to the downstream relay UE. For Item F-3, when the second relay UE switches to be connected to the target host relay UE, the target host relay UE is used to replace the downstream UE to listen for paging messages and forward the paging messages to the downstream relay UE.

[0172] In a specific implementation manner, in order to listen for paging messages, the serving base station performs the following steps:

[0173] Step J1: The serving base station receives paging assistance information from a remote UE forwarded by a first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count from the remote UE. The downstream UEs of the first relay UE at least include: the remote UE that accesses the serving base station through the first relay UE;

[0174] Step J2: The serving base station sends the paging message containing the identifier of any downstream UE of the first relay UE to the first relay UE.

[0175] In an embodiment of the present application, the first relay UE sends paging assistance information from the remote UE to the serving base station. After the serving base station obtains the paging message from the core network device, according to the identifier of any downstream UE of the first relay UE included in the paging message, the serving base station sends the paging message to the first relay UE, so that the first relay UE forwards the received paging message to any downstream UE of the first relay UE (including but not limited to the remote UE served by the first relay UE), realizing paging message monitoring. In one embodiment, when the first relay UE is in the RRC_CONNECTED state, it sends the paging assistance information from the remote UE to the serving base station.

[0176] In a specific implementation manner, the remote UE further performs the following steps:

[0177] The remote UE sends a release request for the paging assistance information to the first relay UE. The release request for the paging assistance information is used to request the first relay UE to perform at least one of the following:

[0178] Item K-1: Release the paging assistance information of the remote UE;

[0179] Item K-2: Stop listening for paging messages for the remote UE.

[0180] In an embodiment of the present application, when the remote UE does not need the first relay UE to listen for paging messages on its behalf, it can send a release request for the paging assistance information to the first relay UE. The first relay UE performs at least one of the following according to the release request: releasing the paging assistance information of the remote UE, and no longer listening for paging messages for the remote UE.

[0181] In one embodiment, since the first relay UE records the correspondence between the paging identifier of the remote UE and the identifier of the first sub-UE of the first relay UE, when the first relay UE receives a release request for the paging assistance information of any remote UE, the correspondence between the paging identifier of the remote UE and the identifier of the first sub-UE is released. Similarly, for the second relay UE between the first relay UE and the remote UE, which records the correspondence between the paging identifier of the remote UE and the identifier of the second sub-UE of the second relay UE, when the second relay UE receives a release request for the paging assistance information of any remote UE, the correspondence between the paging identifier of the remote UE and the identifier of the second sub-UE is released.

[0182] In a second aspect, a paging monitoring method is provided. This method is applied to a first relay terminal. Refer to Figure 7 As shown, it is a flowchart of a paging monitoring method provided by an embodiment of the present application. This method at least includes the following steps:

[0183] Step S710: When the first relay UE receives paging assistance information from a remote UE sent by the first sub-UE, record the correspondence between the identifier of the remote UE and the identifier of the first sub-UE. The first sub-UE is the next-hop relay UE of the first relay UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE. The paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE;

[0184] Step S720: The first relay UE forwards the paging message monitored by the first relay UE to the first sub-UE according to the correspondence.

[0185] Through the above steps, the relay UE receives paging assistance information. The relay UE determines whether it belongs to the first relay UE. When the relay UE determines that it belongs to the first relay UE, it monitors the paging message and forwards the monitored paging message to the remote UE; or, when the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE. Among them, the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE at any transmission hop count from the remote UE. The paging assistance information is used to assist the first relay UE in monitoring the paging message for the remote UE. The first relay UE is a relay UE within the network coverage area of the serving base station at any transmission hop count from the remote UE, that is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, and a relay UE having a radio resource control (RRC) connection with the serving base station. Having the first relay UE monitor the paging message on behalf of the remote UE solves the problem that a relay UE in a state without network signal coverage cannot monitor the paging message on behalf of the remote UE and the problem that a remote UE in a state without network signal coverage cannot monitor its own paging message.

[0186] In a specific embodiment, it further includes:

[0187] After the first relay UE enters the RRC_CONNECTED state, it reports the identifiers of at least one downstream UE of the first relay UE to the serving base station. The at least one downstream UE of the first relay UE includes at least one UE that accesses the serving base station through the first relay UE.

[0188] In a specific embodiment, it further includes:

[0189] The first relay UE receives first indication information sent by the serving base station. The first indication information is used to instruct the first relay UE to report the identifiers of at least one downstream UE of the first relay UE to the serving base station.

[0190] In a specific embodiment, it further includes:

[0191] The first relay UE receives a release request for the paging assistance information sent by the remote UE. The release request for the paging assistance information is used to request the first relay UE to perform at least one of the following:

[0192] Release the paging assistance information of the remote UE;

[0193] Stop monitoring the paging message for the remote UE.

[0194] In a specific embodiment, the paging assistance information includes at least one of the following:

[0195] The paging identifier of the remote UE;

[0196] The terminal 5G identifier ng-5G-S-TMSI;

[0197] The inactive state - radio network temporary identifier fullI-RNTI;

[0198] The discontinuous reception DRX configuration for listening to paging messages;

[0199] The transmission hop count of the remote UE from the first relay UE.

[0200] The paging listening method provided by the embodiments of this application can implement each process implemented by the embodiments of the second aspect and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0201] In a third aspect, a paging listening method is provided. This method is applied to a second relay terminal. Refer to Figure 8 As shown, it is a flowchart of a paging listening method provided by the embodiments of this application. This method includes at least the following steps:

[0202] Step S810: When the second relay UE receives paging assistance information from the remote UE sent by the second sub-UE, record the correspondence between the identifier of the remote UE and the identifier of the second sub-UE. The second sub-UE is the next-hop relay UE of the second relay UE, and the second relay UE is the relay UE between the first relay UE and the remote UE; the first relay UE is a relay UE at any transmission hop count from the remote UE within the network coverage area of the serving base station of the remote UE. The paging assistance information is used to assist the first relay UE in listening to paging messages for the remote UE;

[0203] Step S820: The second relay UE forwards the received paging message to the second sub-UE according to the correspondence.

[0204] Through the above steps, the relay UE receives paging assistance information, and the relay UE determines whether it belongs to the first relay UE. When the relay UE determines that it belongs to the first relay UE, it listens for paging messages and forwards the listened paging messages to the remote UE; or, when the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE. Among them, the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count from the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE. The first relay UE is a relay UE within the network coverage area of the serving base station and at any transmission hop count from the remote UE, that is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, a relay UE having a radio resource control (RRC) connection with the serving base station. Having the first relay UE listen for paging messages on behalf of the remote UE solves the problem that a relay UE in a state without network signal coverage cannot listen for paging messages on behalf of the remote UE and the problem that a remote UE in a state without network signal coverage cannot listen for its own paging messages.

[0205] In a specific implementation manner, it further includes:

[0206] When the paging message received by the second relay UE contains the identifier of the first downstream UE of the second relay UE, the second relay UE forwards the received paging message to at least one next-hop relay UE of the second relay UE. The first downstream UE of the second relay UE includes: a UE that accesses the serving base station through the second relay UE.

[0207] In a specific implementation manner, it further includes at least one of the following:

[0208] When the parent UE of the second relay UE undergoes a handover, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the parent UE after the handover. The parent UE of the second relay UE is the previous-hop relay UE of the second relay UE;

[0209] When the host relay UE undergoes a handover, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the target host relay UE after the handover;

[0210] When the second relay UE switches from the host relay UE to the target host relay UE, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the target host relay UE.

[0211] The paging monitoring method provided by the embodiments of this application can implement all the processes implemented by the embodiments of the third aspect and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0212] Fourthly, a paging monitoring method is provided. This method is applied to a remote terminal. Refer to Figure 9 As shown in the figure, it is a flowchart of a paging monitoring method provided by the embodiments of this application. This method at least includes the following steps:

[0213] Step S910: The remote UE sends paging assistance information;

[0214] Step S920: The remote UE receives a paging message forwarded by a first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE. The paging assistance information is used to assist the first relay UE in monitoring the paging message for the remote UE.

[0215] Through the above steps, the relay UE receives the paging assistance information, and the relay UE determines whether it belongs to the first relay UE. In the case where the relay UE determines that it belongs to the first relay UE, it monitors the paging message and forwards the monitored paging message to the remote UE; or, in the case where the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE. Among them, the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE. The paging assistance information is used to assist the first relay UE in monitoring the paging message for the remote UE. The first relay UE is a relay UE within the network coverage area of the serving base station and at any number of transmission hops away from the remote UE, that is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, a relay UE having a radio resource control (RRC) connection with the serving base station. Let the first relay UE monitor the paging message for the remote UE, which solves the problem that a relay UE in a state without network signal coverage cannot monitor the paging message for the remote UE and the problem that a remote UE in a state without network signal coverage cannot monitor its own paging message.

[0216] In a specific implementation manner, the first relay UE includes at least one of the following:

[0217] A host relay UE, where the host relay UE is: a relay UE in a state directly connected to the serving base station, or a relay UE having the condition of being directly connected to the serving base station;

[0218] A relay UE on the backhaul path between the serving base station and the remote UE that meets the paging message listening condition, where the paging message listening condition includes at least one of the following:

[0219] The relay UE enters the network coverage area of the serving base station;

[0220] The relay UE is within the network coverage area of the serving base station and changes from a non-host relay UE to a host relay UE;

[0221] The relay UE enters the Radio Resource Control Connected state RRC_CONNECTED state.

[0222] In a specific embodiment, the relay UE on the backhaul path between the serving base station and the remote UE that meets the paging message listening condition includes at least one of the following:

[0223] An access relay UE, where the access relay UE is a relay UE directly wirelessly connected to the remote UE;

[0224] An intermediate relay UE, where the intermediate relay UE is a relay UE between the access UE and the host relay UE.

[0225] In a specific embodiment, the remote UE sends paging assistance information, including at least one of the following:

[0226] The remote UE sends paging assistance information to the first relay UE through the PC5 RRC connection with the first relay UE;

[0227] The remote UE sends the paging assistance information to the first parent UE through the PC5 RRC connection with the first parent UE, so that the first parent UE sends the paging assistance information hop by hop to the first relay UE, where the first parent UE is the previous-hop relay UE of the remote UE;

[0228] The remote UE sends paging assistance information to the serving base station so that the serving base station sends the paging assistance information to the first relay UE.

[0229] In a specific embodiment, the method further includes: the remote UE receives the paging message forwarded by the first relay UE in at least one of the following ways:

[0230] The remote UE receives the paging message forwarded by the first relay UE, and the paging message is transmitted through the PC5 RRC connection between the first relay UE and the remote UE;

[0231] The remote UE receives a paging message forwarded by the previous-hop relay UE of the remote UE, and the paging message is transmitted hop by hop through each-hop PC5 RRC connection between the remote UE and the first relay UE.

[0232] In a specific embodiment, the paging assistance information includes at least one of the following:

[0233] The paging identifier of the remote UE;

[0234] The terminal 5G identifier ng-5G-S-TMSI;

[0235] The inactive state - radio network temporary identifier fullI-RNTI;

[0236] The discontinuous reception DRX configuration for listening to paging messages;

[0237] The transmission hop count of the remote UE from the first relay UE.

[0238] In a specific embodiment, it further includes:

[0239] The remote UE sends a release request for the paging assistance information to the first relay UE, and the release request for the paging assistance information is used to request the first relay UE to perform at least one of the following:

[0240] Release the paging assistance information of the remote UE;

[0241] Stop listening for paging messages for the remote UE.

[0242] The paging listening method provided by the embodiments of this application can implement each process implemented by the embodiments of the fourth aspect and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0243] In a fifth aspect, a paging listening method is provided, and this method is applied to a serving base station. Refer to Figure 10 As shown, it is a flowchart of a paging listening method provided by the embodiments of this application, and this method at least includes the following steps:

[0244] Step S1010: The serving base station receives paging assistance information from the remote UE forwarded by the first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count from the remote UE. The downstream UEs of the first relay UE at least include: the remote UE that accesses the serving base station through the first relay UE;

[0245] Step S1020: The serving base station sends the paging message containing the identifier of any downstream UE of the first relay UE to the first relay UE.

[0246] In the embodiments of the present application, the first relay UE sends the paging assistance information from the remote UE to the serving base station. After receiving the paging assistance information, the serving base station can know the downstream UE of the first relay UE according to the paging assistance information. When the serving base station receives the paging message from the core network device based on the remote UE, it can send the paging message to the corresponding first relay UE according to the paging identifier in the paging message, so that the first relay UE forwards the received paging message to the remote UE to implement paging monitoring. In one embodiment, when the first relay UE is in the RRC_CONNECTED state, it sends the paging assistance information from the remote UE to the serving base station.

[0247] The first relay UE includes at least one of the following: a relay UE within the network coverage area, and a relay UE having a Radio Resource Control (RRC) connection with the serving base station. The first relay UE listens for paging messages on behalf of the remote UE, which solves the problem that a relay UE in a state of no network signal coverage cannot listen for paging messages on behalf of the remote UE and the problem that a remote UE in a state of no network signal coverage cannot listen for its own paging messages.

[0248] In a specific implementation manner, the paging assistance information includes at least one of the following:

[0249] The paging identifier of the remote UE;

[0250] Terminal 5G identifier ng-5G-S-TMSI;

[0251] Inactive state - Radio Network Temporary Identifier fullI-RNTI;

[0252] Discontinuous Reception (DRX) configuration for listening for paging messages;

[0253] The transmission hop count of the remote UE from the first relay UE.

[0254] The paging monitoring method provided in the embodiments of the present application can implement each process implemented in the fifth aspect embodiment and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0255] Sixth aspect, a paging monitoring method is provided, which is applied to a serving base station. Refer to Figure 11 As shown, it is a flowchart of a paging monitoring method provided in the embodiments of the present application. The method at least includes the following steps:

[0256] Step S1110: The serving base station receives the paging assistance information sent by the remote UE;

[0257] Step S1120: The serving base station sends the paging assistance information to the first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE. The paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE.

[0258] Through the above steps, the relay UE receives the paging assistance information. The relay UE determines whether it belongs to the first relay UE. If the relay UE determines that it belongs to the first relay UE, it listens for paging messages and forwards the listened paging messages to the remote UE; or, if the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE. Among them, the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE. The paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE. The first relay UE is a relay UE within the network coverage area of the serving base station and at any number of transmission hops away from the remote UE, that is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, a relay UE having a radio resource control (RRC) connection with the serving base station. Having the first relay UE listen for paging messages on behalf of the remote UE solves the problem that a relay UE in a state of no network signal coverage cannot listen for paging messages on behalf of the remote UE and the problem that a remote UE in a state of no network signal coverage cannot listen for its own paging messages.

[0259] In a specific implementation manner, the paging assistance information includes at least one of the following:

[0260] The paging identifier of the remote UE;

[0261] The terminal 5G identifier ng-5G-S-TMSI;

[0262] The inactive state - radio network temporary identifier fullI-RNTI;

[0263] The discontinuous reception (DRX) configuration for listening for paging messages;

[0264] The number of transmission hops of the remote UE from the first relay UE.

[0265] The paging listening method provided by the embodiments of this application can implement each process implemented by the embodiments of the sixth aspect and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0266] In a seventh aspect, a paging listening device is provided. This device is applied to a relay UE, asFigure 12 As shown in the figure, the paging monitoring device 1200 includes:

[0267] A first receiving module 1210, configured to receive paging assistance information;

[0268] A first determining module 1220, configured to determine whether itself belongs to a first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any transmission hop count away from the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE;

[0269] A first auxiliary monitoring module, configured to, when determining that itself belongs to the first relay UE, monitor paging messages and forward the monitored paging messages to the remote UE; or configured to, when determining that itself does not belong to the first relay UE, forward the paging assistance information to the previous-hop relay UE of the relay UE.

[0270] In a specific embodiment, the first auxiliary monitoring module includes at least one of the following:

[0271] A first auxiliary monitoring sub-module, configured to forward the paging messages monitored by the first relay UE to the remote UE through a PC5 RRC connection with the remote UE;

[0272] A second auxiliary monitoring sub-module, configured to forward the paging messages monitored by the first relay UE to a first sub-UE through a PC5 RRC connection with the first sub-UE, so as to forward the paging messages monitored by the first relay UE to the remote UE hop by hop through the first sub-UE, where the first sub-UE is the next-hop relay UE of the first relay UE.

[0273] The paging monitoring device in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0274] The paging monitoring device provided in the embodiments of the present application can implement each process implemented by the corresponding paging monitoring method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0275] In an eighth aspect, a paging monitoring device is provided, and this device is applied to a first relay terminal, such asFigure 13 As shown in the figure, the paging monitoring device 1300 includes:

[0276] A first recording module 1310, configured to record the correspondence between the identifier of the remote UE and the identifier of the first sub-UE when the first relay UE receives paging assistance information sent by the first sub-UE from the remote UE, where the first sub-UE is the next-hop relay UE of the first relay UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE;

[0277] A first forwarding module 1320, configured to forward the paging message monitored by the first relay UE to the first sub-UE according to the correspondence.

[0278] In a specific embodiment, it further includes:

[0279] A second forwarding module, configured to, when the paging message monitored by the first relay UE includes the identifier of the first downstream UE of the first relay UE, the first relay UE forwards the paging message monitored by the first relay UE to at least one next-hop relay UE of the first relay UE, and the first downstream UE of the first relay UE includes: a UE that accesses the serving base station through the first relay UE.

[0280] In a specific embodiment, it further includes:

[0281] A reporting module, configured to, after the first relay UE enters the RRC_CONNECTED state, report the identifiers of at least one downstream UE of the first relay UE to the serving base station, and the at least one downstream UE of the first relay UE includes: at least one UE that accesses the serving base station through the first relay UE.

[0282] The paging monitoring device in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0283] The paging monitoring device provided in the embodiments of the present application can implement each process implemented by the corresponding paging monitoring method embodiment and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0284] In a ninth aspect, a paging monitoring device is provided. This device is applied to a first relay terminal. As Figure 14 shown, the paging monitoring device 1400 includes:

[0285] A second recording module 1410, configured to record the corresponding relationship between the identifier of the remote UE and the identifier of the second sub-UE when the second relay UE receives paging assistance information sent by the second sub-UE from the remote UE. The second sub-UE is the next-hop relay UE of the second relay UE, and the second relay UE is the relay UE between the first relay UE and the remote UE; the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE at any number of transmission hops from the remote UE. The paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE;

[0286] A third forwarding module 1420, configured to forward the received paging message to the second sub-UE according to the corresponding relationship.

[0287] In a specific embodiment, it further includes:

[0288] A fourth forwarding module, configured to, when the paging message received by the second relay UE contains the identifier of the first downstream UE of the second relay UE, the second relay UE forwards the received paging message to at least one next-hop relay UE of the second relay UE. The first downstream UE of the second relay UE includes: UEs that access the serving base station through the second relay UE.

[0289] In a specific embodiment, it further includes at least one of the following:

[0290] A first sending module, configured to send the identifiers of at least one downstream UE of the second relay UE to the parent UE after handover when the parent UE of the second relay UE undergoes handover. The parent UE of the second relay UE is the previous-hop relay UE of the second relay UE;

[0291] A second sending module, configured to send the identifiers of at least one downstream UE of the second relay UE to the target host relay UE after handover when the host relay UE undergoes handover;

[0292] A third sending module, configured to send the identifiers of at least one downstream UE of the second relay UE to the target host relay UE when the second relay UE switches from the host relay UE to the target host relay UE.

[0293] In a tenth aspect, a paging monitoring device is provided. This device is applied to a remote terminal, such as Figure 15 as shown. The paging monitoring device 1500 includes:

[0294] A third sending module 1510, configured to send paging assistance information;

[0295] A second receiving module 1520, configured to receive a paging message forwarded by a first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE. The paging assistance information is used to assist the first relay UE in monitoring the paging message for the remote UE.

[0296] In a specific implementation manner, the third sending module includes at least one of the following:

[0297] A first sending sub-module, configured to send paging assistance information to the first relay UE through a PC5 RRC connection with the first relay UE;

[0298] A second sending sub-module, configured to send paging assistance information to the first parent UE through a PC5 RRC connection with the first parent UE, so that the first parent UE forwards the paging assistance information hop by hop to the first relay UE. The first parent UE is the previous-hop relay UE of the remote UE;

[0299] A third sending sub-module, configured to send paging assistance information to the serving base station, so that the serving base station sends the paging assistance information to the first relay UE.

[0300] In a specific implementation manner, it further includes at least one of the following:

[0301] A third receiving module, configured to receive the paging message forwarded by the first relay UE:

[0302] A fourth receiving module, configured to receive the paging message forwarded by the first relay UE, where the paging message is transmitted through a PC5 RRC connection between the first relay UE and the remote UE;

[0303] A fifth receiving module, configured to receive the paging message forwarded by the previous-hop relay UE of the remote UE, where the paging message is transmitted hop by hop through each PC5 RRC connection between the remote UE and the first relay UE.

[0304] In an eleventh aspect, a paging monitoring device is provided. This device is applied to a serving base station, such as Figure 16 as shown. The paging monitoring device 1600 includes:

[0305] The sixth receiving module 1610 is configured to receive paging assistance information from a remote UE forwarded by a first relay UE, where the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the downstream UEs of the first relay UE at least include: the remote UE accessing the serving base station through the first relay UE;

[0306] The fourth sending module 1620 is configured to send a paging message including the identifier of any downstream UE of the first relay UE to the first relay UE.

[0307] In a twelfth aspect, a paging monitoring device is provided. The device is applied to a serving base station. As Figure 17 shown, the paging monitoring device 1700 includes:

[0308] The seventh receiving module 1710 is configured to receive paging assistance information sent by a remote UE;

[0309] The fifth sending module 1720 is configured to send the paging assistance information to a first relay UE, where the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE.

[0310] The paging monitoring device in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0311] The paging monitoring device provided in the embodiments of the present application can implement each process implemented by the corresponding paging monitoring method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0312] As Figure 18As shown, an embodiment of the present application further provides a communication device 1800, which includes a processor 1801 and a memory 1802. A program or instruction that can run on the processor 1801 is stored on the memory 1802. For example, when the communication device 1800 is a terminal, when the program or instruction is executed by the processor 1801, each step of the above paging monitoring method embodiment is implemented, and the same technical effect can be achieved. When the communication device 1800 is a network-side device, when the program or instruction is executed by the processor 1801, each step of the above paging monitoring method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0313] An embodiment of the present application further provides a terminal, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to implement the steps in the above method embodiment shown on the terminal side. This terminal embodiment corresponds to the above method embodiment on the terminal side. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment, and the same technical effect can be achieved. Specifically, Figure 19 It is a schematic diagram of the hardware structure of a terminal according to an embodiment of the present application.

[0314] The terminal 1900 includes, but is not limited to: at least some components such as a radio frequency unit 1901, a network module 1902, an audio output unit 1903, an input unit 1904, a sensor 1905, a display unit 1906, a user input unit 1907, an interface unit 1908, a memory 1909, and a processor 1910.

[0315] Those skilled in the art can understand that the terminal 1900 may further include a power source (such as a battery) for supplying power to each component. The power source can be logically connected to the processor 1910 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 19 The terminal structure shown in does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine some components, or have different component arrangements, which will not be elaborated here.

[0316] It should be understood that in the embodiments of the present application, the input unit 1904 may include a Graphics Processing Unit (GPU) 19041 and a microphone 19042. The graphics processor 19041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1906 may include a display panel 19061, and the display panel 19061 may be configured in the form of, for example, a liquid crystal display, an organic light emitting diode, etc. The user input unit 1907 includes at least one of a touch panel 19071 and other input devices 19072. The touch panel 19071 is also referred to as a touch screen. The touch panel 19071 may include two parts: a touch detection device and a touch controller. The other input devices 19072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be elaborated herein.

[0317] In the embodiments of the present application, after receiving downlink data from a network-side device, the radio frequency unit 1901 may transmit it to the processor 1910 for processing; in addition, the radio frequency unit 1901 may send uplink data to the network-side device. Generally, the radio frequency unit 1901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0318] The memory 1909 can be used to store software programs or instructions and various data. The memory 1909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1909 may include volatile memory or non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 1909 in the embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

[0319] The processor 1910 may include one or more processing units; optionally, the processor 1910 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 1910 either.

[0320] Among them, the radio frequency unit 1901 is used for the relay UE to receive paging assistance information; the relay UE determines whether it belongs to the first relay UE, and the paging assistance information is used to assist the first relay UE to monitor paging messages for the remote UE; when the relay UE determines that it belongs to the first relay UE, it monitors the paging message and forwards the monitored paging message to the remote UE; or when the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE.

[0321] A processor 1910 is configured to relay the paging assistance information received by the UE. The relay UE determines whether it belongs to the first relay UE. The paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE. When the relay UE determines that it belongs to the first relay UE, it listens for paging messages and forwards the listened paging messages to the remote UE. Alternatively, when the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE.

[0322] In the embodiments of the present application, the first relay UE is a relay UE at any number of transmission hops away from the remote UE within the network coverage area of the serving base station. That is, the first relay UE includes at least one of the following: a relay UE within the network coverage area, and a relay UE having a radio resource control (RRC) connection with the serving base station. Having the first relay UE listen for paging messages on behalf of the remote UE solves the problem that a relay UE in a state without network signal coverage cannot listen for paging messages on behalf of the remote UE and the problem that a remote UE in a state without network signal coverage cannot listen for its own paging messages.

[0323] It can be understood that the implementation processes of the various implementation manners mentioned in this embodiment can refer to the relevant descriptions of the paging listening method in the method embodiments and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0324] The embodiments of the present application further provide a serving base station, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement the steps of the method embodiments as shown on the serving base station side. This serving base station embodiment corresponds to the above-mentioned serving base station method embodiments. The various implementation processes and implementation manners of the above method embodiments can all be applied to this serving base station embodiment and can achieve the same technical effects.

[0325] Specifically, the embodiments of the present application further provide a serving base station. As Figure 20 shown, the serving base station 2000 includes: a processor 2001, a network interface 2002, and a memory 2003. Among them, the network interface 2002 is, for example, a common public radio interface (CPRI).

[0326] Specifically, the serving base station 2000 in the embodiments of the present invention further includes: instructions or programs stored on the memory 2003 and executable on the processor 1501. The processor 2001 calls the instructions or programs in the memory 2003 to execute the methods performed by the respective modules shown on the serving base station side and achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0327] The embodiments of the present application further provide a readable storage medium, on which a program or instructions are stored. When the program or instructions are executed by a processor, the various processes of the above-mentioned paging monitoring method embodiments are implemented, and the same technical effects can be achieved. To avoid repetition, details are not described here again.

[0328] Among them, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0329] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the various processes of the above-mentioned paging monitoring method embodiments, and the same technical effects can be achieved. To avoid repetition, details are not described here again.

[0330] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip.

[0331] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned paging monitoring method embodiments, and the same technical effects can be achieved. To avoid repetition, details are not described here again.

[0332] The embodiments of the present application further provide a paging monitoring system, which includes: a remote terminal, a relay terminal, and a serving base station. The remote terminal is configured to execute the steps performed by the remote terminal in the above method embodiments, the relay terminal is configured to execute the steps performed by the relay terminal, the first relay terminal, or the second relay terminal in the above method embodiments, and the serving base station is configured to execute the steps performed by the serving base station in the above method embodiments.

[0333] It should be noted that, in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0334] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a service base station to execute the methods described in various embodiments of the present application.

[0335] The embodiments of the present application have been described above with reference to the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A paging monitoring method, characterized in that, it includes: The relay UE receives paging assistance information; The relay UE determines whether it belongs to the first relay UE. The first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE. The paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE; When the relay UE determines that it belongs to the first relay UE, it monitors the paging message and forwards the monitored paging message to the remote UE; Or When the relay UE determines that it does not belong to the first relay UE, it forwards the paging assistance information to the previous-hop relay UE of the relay UE.

2. The method according to claim 1, characterized in that, The first relay UE includes at least one of the following: A host relay UE, where the host relay UE is a relay UE in a state of being directly connected to the serving base station or a relay UE having the condition to establish a direct connection with the serving base station; A relay UE on the backhaul path between the serving base station and the remote UE that meets the paging message monitoring condition. The paging message monitoring condition includes at least one of the following: The relay UE enters the network coverage area of the serving base station; The relay UE is within the network coverage area of the serving base station and changes from a non-host relay UE to a host relay UE; The relay UE enters the RRC_CONNECTED state.

3. The method according to claim 2, characterized in that, The relay UE on the backhaul path between the serving base station and the remote UE that meets the paging message monitoring condition includes at least one of the following: An access relay UE, where the access relay UE is a relay UE directly wirelessly connected to the remote UE; An intermediate relay UE, where the intermediate relay UE is a relay UE between the access UE and the host relay UE.

4. The method according to any one of claims 1-3, characterized in that, When the relay UE determines that it belongs to the first relay UE and the paging message monitored by the relay UE contains the identifier of the remote UE, the relay UE forwards the monitored paging message to the remote UE in at least one of the following ways: The relay UE forwards the monitored paging message to the remote UE through the PC5 RRC connection between the relay UE and the remote UE; The relay UE forwards the monitored paging message to the first sub-UE through the PC5 RRC connection between the relay UE and the first sub-UE, so that the first sub-UE forwards the paging message monitored by the relay UE hop by hop to the remote UE. The first sub-UE is the next-hop relay UE of the relay UE.

5. The method according to any one of claims 1-4, characterized in that, The paging assistance information includes at least one of the following: The paging identifier of the remote UE; The terminal 5G identifier ng-5G-S-TMSI; Inactive state - Radio Network Temporary Identity fullI-RNTI; Discontinuous Reception DRX configuration for listening to paging messages; The number of transmission hops of the remote UE from the first relay UE.

6. A paging listening method, characterized in that, it includes: When the first relay UE receives paging assistance information from a remote UE sent by a first sub-UE, record the corresponding relationship between the identifier of the remote UE and the identifier of the first sub-UE, where the first sub-UE is the next-hop relay UE of the first relay UE; the first relay UE is a relay UE at any number of transmission hops from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in listening to paging messages for the remote UE; The first relay UE forwards the paging message monitored by the first relay UE to the first sub-UE according to the corresponding relationship.

7. The method according to claim 6, characterized in that, it further includes: When the paging message monitored by the first relay UE contains the identifier of the first downstream UE of the first relay UE, the first relay UE forwards the paging message monitored by the first relay UE to at least one next-hop relay UE of the first relay UE, and the first downstream UE of the first relay UE includes: UEs accessing the serving base station through the first relay UE.

8. The method according to claim 6 or 7, characterized in that, it further includes: After the first relay UE enters the RRC_CONNECTED state, report the identifiers of at least one downstream UE of the first relay UE to the serving base station, where the at least one downstream UE of the first relay UE includes: at least one UE accessing the serving base station through the first relay UE.

9. The method according to claim 8, characterized in that, it further includes: The first relay UE receives first indication information sent by the serving base station, and the first indication information is used to instruct the first relay UE to report the identifiers of at least one downstream UE of the first relay UE to the serving base station.

10. The method according to any one of claims 5 - 9, characterized in that, it further includes: The first relay UE receives a release request for the paging assistance information sent by the remote UE, and the release request for the paging assistance information is used to request the first relay UE to perform at least one of the following: Release the paging assistance information of the remote UE; Stop listening to paging messages for the remote UE.

11. The method according to any one of claims 6 - 10, characterized in that, the paging assistance information includes at least one of the following: The paging identifier of the remote UE; Terminal 5G identifier ng-5G-S-TMSI; Inactive state - Radio Network Temporary Identity fullI-RNTI; Discontinuous Reception DRX configuration for listening to paging messages; The number of transmission hops of the remote UE from the first relay UE.

12. A paging listening method, characterized in that, it includes: When the second relay UE receives the paging assistance information sent by the second sub-UE from the remote UE, record the correspondence between the identifier of the remote UE and the identifier of the second sub-UE. The second sub-UE is the next-hop relay UE of the second relay UE, and the second relay UE is the relay UE between the first relay UE and the remote UE; the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE at any number of transmission hops from the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE. The second relay UE forwards the received paging message to the second sub-UE according to the correspondence.

13. The method according to claim 12, wherein, further comprising: When the paging message received by the second relay UE contains the identifier of the first downstream UE of the second relay UE, the second relay UE forwards the received paging message to at least one next-hop relay UE of the second relay UE. The first downstream UE of the second relay UE includes: UEs accessing the serving base station through the second relay UE.

14. The method according to claim 12 or 13, wherein, further comprising at least one of the following: When the parent UE of the second relay UE undergoes a handover, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the parent UE after the handover. The parent UE of the second relay UE is the previous-hop relay UE of the second relay UE; When the host relay UE undergoes a handover, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the target host relay UE after the handover; When the second relay UE switches from the host relay UE to the target host relay UE, the second relay UE sends the identifiers of at least one downstream UE of the second relay UE to the target host relay UE.

15. A paging listening method, wherein, comprising: The remote UE sends paging assistance information; The remote UE receives the paging message forwarded by the first relay UE. The first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE at any number of transmission hops from the remote UE, and the paging assistance information is used to assist the first relay UE in listening for paging messages for the remote UE.

16. The method according to claim 15, wherein, The first relay UE includes at least one of the following: A host relay UE, where the host relay UE is: a relay UE in a state of being directly connected to the serving base station, or a relay UE that meets the condition of being directly connected to the serving base station; A relay UE on the backhaul path between the serving base station and the remote UE that meets the paging message listening condition. The paging message listening condition includes at least one of the following: The relay UE enters the network coverage area of the serving base station; The relay UE is within the network coverage area of the serving base station and is transformed from a non-host relay UE to a host relay UE; The relay UE enters the Radio Resource Control Connected state RRC_CONNECTED.

17. The method according to claim 16, wherein, The relay UE having the paging message listening condition and on the backhaul path between the serving base station and the remote UE includes at least one of the following: An access relay UE, where the access relay UE is: a relay UE directly wirelessly connected to the remote UE; An intermediate relay UE, where the intermediate relay UE is: a relay UE between the access UE and the host relay UE.

18. The method according to any one of claims 15-17, wherein, The remote UE sends paging assistance information, including at least one of the following: The remote UE sends paging assistance information to the first relay UE through the PC5 RRC connection between the remote UE and the first relay UE; The remote UE sends the paging assistance information to the first parent UE through the PC5 RRC connection between the remote UE and the first parent UE, so that the first parent UE sends the paging assistance information hop by hop to the first relay UE, and the first parent UE is the previous-hop relay UE of the remote UE; The remote UE sends paging assistance information to the serving base station, so that the serving base station sends the paging assistance information to the first relay UE.

19. The method according to any one of claims 15-18, wherein, The method further includes: the remote UE receives the paging message forwarded by the first relay UE in at least one of the following ways: The remote UE receives the paging message forwarded by the first relay UE, and the paging message is transmitted through the PC5 RRC connection between the first relay UE and the remote UE; The remote UE receives the paging message forwarded by the previous-hop relay UE of the remote UE, and the paging message is transmitted hop by hop through each hop of the PC5 RRC connection between the remote UE and the first relay UE.

20. The method according to any one of claims 15-19, wherein, The paging assistance information includes at least one of the following: The paging identifier of the remote UE; The terminal 5G identifier ng-5G-S-TMSI; The inactive state - Radio Network Temporary Identifier fullI-RNTI; The Discontinuous Reception DRX configuration for listening to paging messages; The transmission hop count of the remote UE from the first relay UE.

21. The method according to any one of claims 15-20, wherein, It further includes: The remote UE sends a release request for the paging assistance information to the first relay UE, and the release request for the paging assistance information is used to request the first relay UE to perform at least one of the following: Release the paging assistance information of the remote UE; Stop listening to paging messages for the remote UE.

22. A paging listening method, wherein, It includes: The serving base station receives paging assistance information from a remote UE relayed by a first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE, and the downstream UEs of the first relay UE at least include: the remote UE accessing the serving base station through the first relay UE; The serving base station sends a paging message containing the identifier of any downstream UE of the first relay UE to the first relay UE.

23. According to the method described in claim 22, characterized in that, The paging assistance information includes at least one of the following: The paging identifier of the remote UE; Terminal 5G identifier ng-5G-S-TMSI; Inactive state - Radio Network Temporary Identifier fullI-RNTI; Discontinuous Reception DRX configuration for listening to paging messages; The number of transmission hops of the remote UE from the first relay UE.

24. A paging listening method, characterized in that, includes: The serving base station receives paging assistance information sent by a remote UE; The serving base station sends the paging assistance information to a first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE, and the paging assistance information is used to assist the first relay UE in listening to paging messages for the remote UE.

25. According to the method described in claim 24, characterized in that, The paging assistance information includes at least one of the following: The paging identifier of the remote UE; Terminal 5G identifier ng-5G-S-TMSI; Inactive state - Radio Network Temporary Identifier fullI-RNTI; Discontinuous Reception DRX configuration for listening to paging messages; The number of transmission hops of the remote UE from the first relay UE.

26. A paging listening device, characterized in that, includes: A first receiving module, used to receive paging assistance information; A first determination module, used to determine whether itself belongs to a first relay UE, where the first relay UE is a relay UE within the network coverage area of the serving base station of the remote UE and at any number of transmission hops away from the remote UE, and the paging assistance information is used to assist the first relay UE in listening to paging messages for the remote UE; A first auxiliary listening module, used to listen to paging messages and forward the listened paging messages to the remote UE when determining that itself belongs to the first relay UE; Or used to forward the paging assistance information to the previous-hop relay UE of the relay UE when determining that itself does not belong to the first relay UE.

27. According to the device described in claim 26, characterized in that, The first auxiliary listening module includes at least one of the following: A first auxiliary listening sub-module, used to forward the paging messages listened by the first relay UE to the remote UE through a PC5 RRC connection with the remote UE; The second auxiliary paging monitoring sub-module is used to forward the paging message monitored by the first relay UE to the first sub-UE through the PC5 RRC connection with the first sub-UE, so as to forward the paging message monitored by the first relay UE to the remote UE hop by hop through the first sub-UE, and the first sub-UE is the next-hop relay UE of the first relay UE.

28. A paging monitoring device, characterized in that, it includes: The first recording module is used to record the corresponding relationship between the identifier of the remote UE and the identifier of the first sub-UE when the first relay UE receives paging assistance information sent by the first sub-UE from the remote UE, and the first sub-UE is the next-hop relay UE of the first relay UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE; The first forwarding module is used to forward the paging message monitored by the first relay UE to the first sub-UE according to the corresponding relationship.

29. The paging monitoring device according to claim 28, characterized in that, it further includes: The second forwarding module is used to, when the paging message monitored by the first relay UE includes the identifier of the first downstream UE of the first relay UE, the first relay UE forwards the paging message monitored by the first relay UE to at least one next-hop relay UE of the first relay UE, and the first downstream UE of the first relay UE includes: the UE that accesses the serving base station through the first relay UE.

30. The paging monitoring device according to claim 28 or 29, characterized in that, it further includes: The reporting module is used for the first relay UE to report the identifiers of at least one downstream UE of the first relay UE to the serving base station after entering the RRC_CONNECTED state, and the at least one downstream UE of the first relay UE includes: at least one UE that accesses the serving base station through the first relay UE.

31. A paging monitoring device, characterized in that, it includes: The second recording module is used to record the corresponding relationship between the identifier of the remote UE and the identifier of the second sub-UE when the second relay UE receives paging assistance information sent by the second sub-UE from the remote UE, and the second sub-UE is the next-hop relay UE of the second relay UE, and the second relay UE is a relay UE between the first relay UE and the remote UE; the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE; The third forwarding module is used to forward the received paging message to the second sub-UE according to the corresponding relationship.

32. The paging monitoring device according to claim 31, characterized in that, it further includes: The fourth forwarding module is configured to, when the paging message received by the second relay UE contains the identifier of the first downstream UE of the second relay UE, the second relay UE forwards the received paging message to at least one next-hop relay UE of the second relay UE. The first downstream UE of the second relay UE includes: a UE that accesses the serving base station through the second relay UE.

33. The paging monitoring device according to claim 31 or 32, wherein, it further includes at least one of the following: The first sending module is configured to, when the parent UE of the second relay UE undergoes a handover, send the identifiers of at least one downstream UE of the second relay UE to the parent UE after the handover. The parent UE of the second relay UE is the previous-hop relay UE of the second relay UE; The second sending module is configured to, when the host relay UE undergoes a handover, send the identifiers of at least one downstream UE of the second relay UE to the target host relay UE after the handover; The third sending module is configured to, when the second relay UE switches from the host relay UE to the target host relay UE, send the identifiers of at least one downstream UE of the second relay UE to the target host relay UE.

34. A paging monitoring device, wherein, it includes: The third sending module is configured to send paging assistance information; The second receiving module is configured to receive a paging message forwarded by the first relay UE. The first relay UE is a relay UE at any transmission hop count from the remote UE within the network coverage area of the serving base station of the remote UE. The paging assistance information is used to assist the first relay UE in monitoring paging messages for the remote UE.

35. The paging monitoring device according to claim 34, wherein, the third sending module includes at least one of the following: The first sending sub-module is configured to send paging assistance information to the first relay UE through a PC5 RRC connection with the first relay UE; The second sending sub-module is configured to send paging assistance information to the first parent UE through a PC5 RRC connection with the first parent UE, so that the first parent UE forwards the paging assistance information hop by hop to the first relay UE. The first parent UE is the previous-hop relay UE of the remote UE; The third sending sub-module is configured to send paging assistance information to the serving base station, so that the serving base station sends the paging assistance information to the first relay UE.

36. The paging monitoring device according to claim 34 or 35, wherein, it further includes at least one of the following: The third receiving module is configured to receive the paging message forwarded by the first relay UE: The fourth receiving module is configured to receive the paging message forwarded by the first relay UE, and the paging message is transmitted through a PC5 RRC connection between the first relay UE and the remote UE; A fifth receiving module, configured to receive a paging message forwarded by a previous-hop relay UE of the remote UE, where the paging message is transmitted hop by hop through each-hop PC5 RRC connection between the remote UE and the first relay UE.

37. A paging monitoring device, characterized in that it includes: A sixth receiving module, configured to receive paging assistance information from a remote UE forwarded by a first relay UE, where the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the downstream UEs of the first relay UE at least include: the remote UE accessing the serving base station through the first relay UE; A fourth sending module, configured to send a received paging message including an identifier of any downstream UE of the first relay UE to the first relay UE.

38. A paging monitoring device, characterized in that it includes: A seventh receiving module, configured to receive paging assistance information sent by a remote UE; A fifth sending module, configured to send the paging assistance information to a first relay UE, where the first relay UE is a relay UE at any transmission hop distance from the remote UE within the network coverage area of the serving base station of the remote UE, and the paging assistance information is used to assist the first relay UE in monitoring a paging message for the remote UE.

39. A relay terminal, characterized in that it includes a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the paging monitoring method according to any one of claims 1 to 5, or implements the steps of the paging monitoring method according to any one of claims 6 to 11, or implements the steps of the paging monitoring method according to any one of claims 12 to 14.

40. A remote terminal, characterized in that it includes a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the paging monitoring method according to any one of claims 15 to 21.

41. A serving base station, characterized in that it includes a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the paging monitoring method according to any one of claims 22 to 23, or implements the steps of the paging monitoring method according to any one of claims 24 to 25.

42. A readable storage medium, characterized in that The program or instructions are stored on the readable storage medium, and when the program or instructions are executed by a processor, the steps of the paging monitoring method described in any one of claims 1 to 5 are implemented, or, the steps of the paging monitoring method described in any one of claims 6 to 11 are implemented, or, the steps of the paging monitoring method described in any one of claims 12 to 14 are implemented, or, the steps of the paging monitoring method described in any one of claims 15 to 21 are implemented, or, the steps of the paging monitoring method described in any one of claims 22 to 23 are implemented, or, the steps of the paging monitoring method described in any one of claims 24 to 25 are implemented.

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