Method for updating routing information, relay terminal, and storage medium

Abstract

The present disclosure relates to a method for updating routing information, a relay terminal, and a storage medium. The method comprises: updating routing information on the basis of first indication information and / or a monitoring result of a direct communication interface, wherein the first indication information is used for indicating a state change of a first node on a path associated with a first relay terminal, and the first node is at least one of the following: a second relay terminal; a first remote terminal; and a network device.

Description

Method for updating routing information, relay terminal and storage medium

[0001] Cross-references

[0002] The present disclosure refers to Chinese patent application No. 2023116829447, entitled “Method, relay terminal and storage medium for updating routing information” filed on December 8, 2023, which is incorporated into the present disclosure in its entirety by reference. Technical Field

[0003] The present disclosure relates to the field of communication technology, and in particular to a method for updating routing information, a relay terminal, and a storage medium. Background Art

[0004] With the development of communication technology, multi-hop relay scenarios have emerged. The main difference between multi-hop relay scenarios and traditional mesh networks is that the relay nodes accessed by remote terminals may be terminals rather than network nodes. Therefore, it is necessary to reconsider how to perform routing updates in multi-hop relay scenarios.

[0005] Summary of the Invention

[0006] Based on this, it is necessary to provide a method for updating routing information, a relay device, a computer-readable storage medium, and a computer program product that can be applied to a multi-hop relay scenario where a terminal acts as a relay in order to address the above technical issues.

[0007] In a first aspect, the present disclosure provides a method for updating routing information, comprising:

[0008] updating routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0009] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0010] The first node is at least one of the following:

[0011] a second relay terminal;

[0012] a first remote terminal;

[0013] Network equipment.

[0014] In one embodiment, if the first node is a second relay terminal, the first indication information includes at least one of the following:

[0015] activating a relay function by the second relay terminal;

[0016] Deactivating the relay function of the second relay terminal;

[0017] The relay function of the second relay terminal is changed;

[0018] a change in the target remote end accessible to the second relay terminal;

[0019] a change in the target cell accessible to the second relay terminal;

[0020] the second relay terminal switching instruction information;

[0021] A wireless link failure occurs on the Uu interface between the second relay terminal and the network device;

[0022] A wireless link failure occurs on the PC5 interface between the second relay terminal and the second remote terminal;

[0023] A wireless link failure occurs on the PC5 interface between the second relay terminal and a third relay terminal, and the third relay terminal is a relay terminal different from the first relay terminal.

[0024] In one embodiment, the relay function includes at least one of the following:

[0025] L2 relay;

[0026] L3 trunking;

[0027] U2N relay;

[0028] U2U relay;

[0029] Multi-hop relay.

[0030] In one embodiment, if the first node is a second relay terminal, updating routing information according to the first indication information includes:

[0031] Perform at least one of the following according to the first indication information sent by the second relay terminal:

[0032] Adding routing information with the second relay terminal as the previous hop node;

[0033] Adding routing information with the second relay terminal as the next hop node;

[0034] Deleting routing information with the second relay terminal as the previous hop node;

[0035] Deleting routing information with the second relay terminal as the next hop node;

[0036] changing the target remote terminal corresponding to the routing information associated with the second relay terminal;

[0037] The target network device corresponding to the routing information associated with the second remote terminal is changed.

[0038] In one embodiment, if the first node is the first remote terminal, the first indication information includes at least one of the following:

[0039] The first remote terminal is about to perform relay terminal reselection;

[0040] The first remote terminal is about to be shut down.

[0041] In one embodiment, updating routing information according to the first indication information includes at least one of the following:

[0042] Deleting, according to the first indication information sent by the first remote terminal, routing information with the first remote terminal as the previous hop node;

[0043] According to the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the next hop node is deleted.

[0044] In one embodiment, if the first node is the network device, the first indication information includes at least one of the following:

[0045] RRC connection release message;

[0046] Switch configuration information.

[0047] In one embodiment, updating routing information according to the first indication information includes:

[0048] Perform at least one of the following according to the first indication information sent by the network device:

[0049] Deleting routing information with the network device as the previous hop node;

[0050] Deleting routing information with the network device as a target node;

[0051] Modify the target node in the routing information to the target cell after handover.

[0052] Modify the routing information with the network device as the next hop node.

[0053] In one embodiment, the channel quality monitoring result of the direct communication interface includes:

[0054] The direct communication interface discovers a reference symbol received power SD-RSRP, and / or the direct communication interface communicates a reference symbol received power SL-RSRP.

[0055] In one embodiment, updating routing information according to the channel quality monitoring result includes:

[0056] If the channel quality monitoring result is lower than or equal to a preset threshold, the routing information associated with the channel quality monitoring result is deleted.

[0057] In one embodiment, updating routing information according to the channel quality monitoring result includes:

[0058] If the channel quality monitoring result is higher than a preset threshold, the first relay terminal establishes a direct communication interface connection with the second relay terminal and / or the first remote terminal;

[0059] If the connection of the direct communication interface is successfully established, then the routing information related to the direct communication interface connection is saved.

[0060] In one embodiment, the method further comprises:

[0061] If the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends indication information to the remote terminal, wherein the indication information is used to trigger the remote terminal to perform routing reselection.

[0062] In a second aspect, the present disclosure further provides a first relay terminal, including:

[0063] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0064] updating routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0065] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0066] The first node is at least one of the following:

[0067] a second relay terminal;

[0068] a first remote terminal;

[0069] Network equipment.

[0070] In a third aspect, the present disclosure further provides a first relay terminal, including:

[0071] An updating module, configured to update routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0072] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0073] The first node is at least one of the following:

[0074] a second relay terminal;

[0075] a first remote terminal;

[0076] Network equipment.

[0077] In a fourth aspect, the present disclosure further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0078] updating routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0079] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0080] The first node is at least one of the following:

[0081] a second relay terminal;

[0082] a first remote terminal;

[0083] Network equipment.

[0084] In a fifth aspect, the present disclosure further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0085] updating routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0086] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0087] The first node is at least one of the following:

[0088] a second relay terminal;

[0089] a first remote terminal;

[0090] Network equipment.

[0091] The above-mentioned method, relay terminal, storage medium, and computer program product for updating routing information enable, in a multi-hop relay scenario, a first relay terminal to update routing information based on first indication information and / or monitoring results of a direct communication interface, where the first indication information indicates a status change of a first node on a path associated with the first relay terminal, the first node including at least one of a second relay terminal, a first remote terminal, and a network device. This method provides an applicable routing information update method for multi-hop relay scenarios in which a terminal acts as a relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0093] FIG1 is a schematic diagram of a network architecture of a cellular communication mode;

[0094] FIG2 is a schematic diagram of a network architecture of a direct communication method;

[0095] FIG3 is a schematic diagram of a network architecture that introduces U2N relay;

[0096] FIG4 is a schematic diagram of a network architecture that introduces U2U relay;

[0097] FIG5 is a schematic diagram of a network architecture in which a remote terminal accesses a network via a multi-hop relay;

[0098] FIG6 is a schematic diagram of two remote terminals implementing end-to-end communication via three U2U Relays;

[0099] FIG7 is a flow chart of a method for updating routing information according to an embodiment;

[0100] FIG8 is a second flow chart of a method for updating routing information in one embodiment;

[0101] FIG9 is a third flow chart of a method for updating routing information according to an embodiment;

[0102] FIG10 is a fourth flow chart of a method for updating routing information according to an embodiment;

[0103] FIG11 is a schematic structural diagram of a first relay terminal provided in one embodiment;

[0104] FIG12 is a structural block diagram of a first relay terminal in an embodiment. DETAILED DESCRIPTION

[0105] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure.

[0106] In order to clearly illustrate the technical solution of the present disclosure, the relevant technologies are first introduced:

[0107] (1) Cellular network communication

[0108] Traditional wireless communications use cellular network communications, where terminals and network-side devices transmit uplink and downlink data / control information through the Uu interface.

[0109] In an exemplary embodiment, FIG1 is a schematic diagram of a cellular communication network architecture. FIG1 includes a network device 11, a core network (CN) 12, a user equipment (UE) 1, and a UE 2. UE 1 and network device 11 transmit uplink and downlink data / control information via a Uu interface, and UE 2 and network device 11 also transmit uplink and downlink data / control information via a Uu interface.

[0110] (2) Direct communication

[0111] Direct communication allows nearby terminals to transmit data over a direct communication link within a short distance. The wireless interface corresponding to the direct communication link is called a direct communication interface.

[0112] The direct communication link is also called a sidelink, or a PC5 link, and the direct communication interface is also called a sidelink interface, or a PC5 interface.

[0113] In an exemplary embodiment, Figure 2 is a schematic diagram of a network architecture for direct communication. Figure 2 includes network-side equipment 21, core network (CN) 22, user equipment (UE) 1, and UE2. UE1 and network-side equipment 11 transmit uplink and downlink data / control information via the Uu interface, while UE2 and network-side equipment 11 also transmit uplink and downlink data / control information via the Uu interface. Data is transmitted between UE1 and UE2 via the Sidelink interface.

[0114] (3) Relay

[0115] In order to expand the coverage of the network, it is possible to consider introducing a relay (User-to-Network Relay, U2N relay) between the user equipment and the network node. The U2N relay itself can be a terminal with relay function. For the U2N relay, the interface between it and the network uses the Uu interface, and the interface between it and the relayed terminal (which can be called the remote terminal) uses the Sidelink interface (also known as a direct communication interface, bypass interface or PC5 interface). For the remote terminal, the link (Uu link) between the relay and the network can be called a backhaul link. In an exemplary embodiment, Figure 3 is a schematic diagram of a network architecture introducing a U2N relay. Figure 3 includes: a remote UE, a relay UE and a network-side device. Among them, data is transmitted between the remote UE and the relay UE via the Sidelink interface, and uplink and downlink data / control information are transmitted between the relay UE and the network-side device via the Uu interface (Uu link interface).

[0116] To expand the coverage of direct communication interfaces, a user-to-user relay (U2U Relay) can be introduced between user devices. The U2U Relay itself can be a terminal with relay functionality. In an exemplary embodiment, FIG4 is a schematic diagram of a network architecture that introduces a U2U relay. FIG4 includes: a remote UE, a relay UE, and network-side equipment. A sidelink interface (also known as a direct communication interface, bypass interface, or PC5 interface) is used between the relay UE and the remote terminal.

[0117] With the introduction of U2U Relay and U2N Relay, remote terminals can access the network via multi-hop relays through one or more U2U Relays and one U2N Relay. In an exemplary embodiment, Figure 5 illustrates a network architecture for remote terminals accessing the network via multi-hop relays. Figure 5 includes a remote UE, two U2U Relays, one U2N Relay, and network-side devices. Sidelinks are used between the remote UE and the U2U Relay, between the U2U Relays, and between the U2U Relay and the U2N Relay. Uu links are used between the U2N Relay and the network-side devices.

[0118] With the introduction of U2U Relay, two remote terminals can establish an end-to-end connection through multiple U2U Relay hops. In an exemplary embodiment, Figure 6 shows two remote terminals communicating end-to-end via three U2U Relays. Figure 6 includes two remote UEs and three U2U Relays. Sidelinks are used between the remote terminals and the U2U Relays, and between the U2U Relays themselves.

[0119] With the introduction of multi-hop U2U relay and multi-hop U2N relay, it is necessary to consider a method for updating routing information in a multi-hop U2URelay / U2N Relay network with terminals as relay nodes.

[0120] The method for updating routing information provided by the embodiment of the present disclosure is that, in a multi-hop U2U / U2N Relay scenario, the first relay terminal can update the routing information based on the first indication information and / or the monitoring results of the direct communication interface, thereby providing an applicable routing information update method for the multi-hop Relay scenario in which the terminal acts as a relay.

[0121] The method for updating routing information provided in the embodiments of the present disclosure can be applied to a relay device, also referred to as a first relay terminal in the embodiments of the present disclosure. The first relay terminal can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, and smart car devices. Portable wearable devices can include smart watches, smart bracelets, and head-mounted devices.

[0122] An embodiment of the present disclosure provides a method for updating routing information. The first relay terminal may update the routing information according to the first indication information and / or the monitoring result of the direct communication interface.

[0123] In some embodiments, the first relay terminal may update routing information according to the first indication information.

[0124] In an exemplary embodiment, FIG7 is a flowchart diagram 1 of a method for updating routing information. The method may include but is not limited to the following steps 701 and 702 .

[0125] 701. A first relay terminal receives first indication information from a first node.

[0126] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal, and the first indication information is received by the first relay terminal from the first node.

[0127] The first node is at least one of the following:

[0128] a second relay terminal;

[0129] a first remote terminal;

[0130] Network equipment.

[0131] 702. The first relay terminal updates routing information according to the first instruction information.

[0132] The first relay terminal updates the routing information according to a state change of a first node on a path associated with the first relay terminal.

[0133] The above-mentioned method for updating routing information, in a multi-hop relay scenario, the first relay terminal can update the routing information based on the first indication information sent by the first node, wherein the first indication information is used to indicate the state change of the first node on the path associated with the first relay terminal. This method provides an applicable routing information update method for the multi-hop relay scenario where the terminal acts as a relay.

[0134] The implementation of updating routing information may include various different situations for different first nodes, and several situations will be described below in an exemplary manner.

[0135] 1) The first node is the second relay terminal: U2N Relay / U2U Relay scenario, and receives first indication information from the second relay terminal.

[0136] The U2N Relay / U2U Relay scenario may refer to a scenario in which the first relay terminal functions as a U2N Relay or the first relay terminal functions as a U2U Relay.

[0137] In an exemplary embodiment, FIG8 is a second flow chart of a method for updating routing information. The method may include but is not limited to the following steps 801 and 802 .

[0138] 801. A first relay terminal receives first indication information from a second relay terminal.

[0139] In some embodiments, the second relay terminal may be a relay terminal that has a PC5-RRC / PC5-S connection with the first relay terminal.

[0140] In some embodiments, if the first node is a second relay terminal, the first indication information includes at least one of the following:

[0141] The second relay terminal activates the relay function;

[0142] The second relay terminal deactivates the relay function;

[0143] The relay function of the second relay terminal is changed;

[0144] The target remote end accessible to the second relay terminal changes;

[0145] The target cell accessible to the second relay terminal changes;

[0146] Second relay terminal switching instruction information;

[0147] A wireless link failure occurs on the Uu interface between the second relay terminal and the network device;

[0148] The wireless link failure occurs on the PC5 interface between the second relay terminal and the second remote terminal;

[0149] A wireless link failure occurs on the PC5 interface between the second relay terminal and the third relay terminal, where the third relay terminal is a relay terminal different from the first relay terminal.

[0150] In some embodiments, the second relay terminal activating the relay function may be replaced by the second relay terminal enabling the relay function.

[0151] In some embodiments, the above-mentioned deactivation relay function of the second relay terminal may be replaced by a disabling relay function of the second relay terminal.

[0152] The number of the second relay terminals may be one or more.

[0153] In some embodiments, the relay functionality includes at least one of the following:

[0154] L2 relay;

[0155] L3 trunking;

[0156] U2N relay;

[0157] U2U relay;

[0158] Multi-hop relay.

[0159] The above-mentioned L2 relay refers to Layer 2 relay (Layer 2 Relay). L2 relay forwards data at Layer 2, such as the Sidelink Relay Adaptation Layer (SRAP) of L2.

[0160] The above L3 relay refers to the layer 3 relay. L3 relay refers to the relay that forwards data through the IP layer.

[0161] The above-mentioned U2N relay: U2N stands for the relay from user equipment to network equipment, which can forward received data to the network equipment or forward data received from the network equipment to a remote terminal or other relay equipment.

[0162] The U2U relay mentioned above refers to the relay between user equipments and user equipments. The U2U relay can be used to forward data between two different remote terminals.

[0163] Exemplarily, the change in the relay function of the second relay terminal includes at least one of the following:

[0164] Deactivate L2 relay, deactivate relay L3 relay, deactivate U2N relay, deactivate U2N relay, deactivate multi-hop relay, deactivate L2 relay and activate L3 relay, change from U2U relay to U2N relay, and change from U2N relay to U2U relay.

[0165] 802. The first relay terminal updates routing information according to the first instruction information.

[0166] In some embodiments, if the first node is a second relay terminal, the routing information is updated according to the first indication information but is not limited to:

[0167] Add or delete routing information in the routing table with the second relay terminal as the previous hop node and / or the next hop node;

[0168] and / or,

[0169] Add or delete routing information in the routing table with the first remote terminal as the previous hop node and / or the next hop node.

[0170] In some embodiments, if the first node is a second relay terminal, updating the routing information according to the first indication information includes: performing at least one of the following according to the first indication information sent by the second relay terminal:

[0171] Add routing information with the second relay terminal as the previous hop node;

[0172] Add routing information with the second relay terminal as the next hop node;

[0173] Deleting routing information with the second relay terminal as the previous hop node;

[0174] Deleting routing information with the second relay terminal as the next hop node;

[0175] changing the target remote terminal corresponding to the routing information associated with the second relay terminal;

[0176] The target network device corresponding to the routing information associated with the second remote terminal is changed.

[0177] Exemplarily, if the first indication information is indication information for the second relay terminal to deactivate the relay function, the first relay terminal needs to delete the routing information associated with the second relay terminal in the routing table.

[0178] In some embodiments, if the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends an indication message to the remote terminal, wherein the indication message is used to trigger the remote terminal to perform route reselection.

[0179] The updating of the routing information may include but is not limited to: deletion of routing information, and / or modification of routing information.

[0180] Exemplarily, when routing information deletion and / or routing information modification occurs, if there is a remote terminal that is using the routing information for U2N communication or U2U communication, routing reselection is performed for the remote terminal and / or indication information is sent to the remote terminal to trigger the remote terminal to perform routing reselection.

[0181] In the above method of updating routing information, in a multi-hop U2U / U2N Relay scenario, the first relay terminal can update routing information according to the first indication information sent by the second relay terminal, thereby providing an applicable routing information update method for the multi-hop Relay scenario where the terminal acts as a relay.

[0182] 2) The first node is a first remote terminal: U2N Relay / U2U Relay scenario, and receives first indication information from the first remote terminal.

[0183] The U2N Relay / U2U Relay scenario may refer to a scenario in which the first relay terminal functions as a U2N Relay or the first relay terminal functions as a U2U Relay.

[0184] In an exemplary embodiment, FIG9 is a flowchart diagram 3 of a method for updating routing information. The method may include but is not limited to the following steps 901 and 902 .

[0185] 901. A first relay terminal receives first indication information from a first remote terminal.

[0186] In some embodiments, the first remote terminal may be a relay terminal that has a PC5-RRC / PC5-S connection with the first relay terminal.

[0187] In some embodiments, if the first node is a first remote terminal, the first indication information includes at least one of the following:

[0188] The first remote terminal is about to perform relay terminal reselection;

[0189] The first remote terminal is about to shut down.

[0190] 902. The first relay terminal updates routing information according to the first instruction information.

[0191] In some embodiments, the above-mentioned first remote terminal is about to perform relay terminal reselection, indicating that the first relay terminal will disconnect the PC5-S and / or PC5-RRC connection with the first remote terminal. At this time, the routing information in which the first remote terminal is the previous hop node or the first remote terminal is the next hop node can be deleted.

[0192] In some embodiments, the first remote terminal is about to shut down, indicating that the first relay terminal will disconnect the PC5-S and / or PC5-RRC connection with the first remote terminal. At this time, the routing information in which the first remote terminal is the previous hop node or the first remote terminal is the next hop node can be deleted.

[0193] In some embodiments, based on the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the previous hop node is deleted;

[0194] In some embodiments, routing information with the first remote terminal as the next hop node is deleted according to first indication information sent by the first remote terminal.

[0195] In some embodiments, based on the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the previous hop node is deleted, and the routing information with the first remote terminal as the next hop node is deleted.

[0196] In some embodiments, if the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends an indication message to the remote terminal, wherein the indication message is used to trigger the remote terminal to perform route reselection.

[0197] The updating of the routing information may include but is not limited to: deletion of routing information, and / or modification of routing information.

[0198] Exemplarily, when routing information is deleted and / or modified, if there is a remote terminal that is using the routing information for U2N communication or U2U communication, routing reselection is performed for the remote terminal and / or the second remote terminal is notified to perform routing reselection.

[0199] In the above method of updating routing information, in a multi-hop relay scenario, the first relay terminal can update routing information according to the first indication information sent by the first remote terminal, thereby providing an applicable routing information updating method for the multi-hop relay scenario where the terminal acts as a relay.

[0200] 3) The first node is a network device: in a U2N Relay / U2U Relay scenario, the first indication information is received from the network device.

[0201] The U2N Relay / U2U Relay scenario may refer to a scenario in which the first relay terminal functions as a U2N Relay or the first relay terminal functions as a U2U Relay.

[0202] In an exemplary embodiment, FIG10 is a fourth flow chart of a method for updating routing information. The method may include but is not limited to the following steps 1001 and 1002 .

[0203] 1001. A first relay terminal receives first indication information from a network device.

[0204] In some embodiments, if the first node is a network device, the first indication information includes at least one of the following:

[0205] RRC connection release message;

[0206] Switch configuration information.

[0207] Exemplarily, the handover configuration information may be Radio Resource Control (RRC) reconfiguration (RRCReconfigurationwithsync).

[0208] The RRCReconfigurationwithsync is a message sent by the network device to the terminal. When the terminal receives the RRCReconfigurationwithsync, it will perform a handover operation. If the terminal receiving the RRCReconfigurationwithsync sent by the network device is the first relay terminal, it means that the first relay terminal needs to perform a handover operation.

[0209] The RRC connection release message means that the network device needs to release the Uu interface RRC connection of the first remote terminal. The terminal is about to enter an idle (IDLE) state or an inactive (INACTIVE) state.

[0210] 1002. The first relay terminal updates routing information according to the first instruction information.

[0211] In some embodiments, the first relay terminal may perform at least one of the following according to the first indication information sent by the network device:

[0212] Delete the routing information with the network device as the previous hop node;

[0213] Delete the routing information with the network device as the target node;

[0214] Modify the target node in the routing information to the target cell after handover;

[0215] Modify the routing information with the network device as the next hop node.

[0216] Exemplarily, after the first relay terminal receives the RRC connection release message sent by the network device, it indicates that the RRC connection between the network device and the first relay terminal is about to be disconnected. At this time, the routing information related to the first remote terminal in the routing table can be deleted. For example, the routing information with the network device as the previous hop node can be deleted, or the routing information with the network device as the target node can be deleted.

[0217] Exemplarily, after the first relay terminal receives the handover configuration information sent by the network device, indicating that the first remote terminal needs to change the serving cell or change the key, the routing information related to the network device can be deleted and / or modified. For example, at least one of the following is performed:

[0218] Delete the routing information with the network device as the previous hop node;

[0219] Delete the routing information with the network device as the target node;

[0220] Modify the target node in the routing information to the target cell after handover;

[0221] Modify the routing information with the network device as the next hop node.

[0222] In some embodiments, if the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends an indication message to the remote terminal, wherein the indication message is used to trigger the remote terminal to perform route reselection.

[0223] The updating of the routing information may include but is not limited to: deletion of routing information, and / or modification of routing information.

[0224] Exemplarily, when routing information deletion and / or routing information modification occurs, if there is a remote terminal that is using the routing information for U2N communication or U2U communication, routing reselection is performed for the remote terminal and / or indication information is sent to the remote terminal to trigger the remote terminal to perform routing reselection.

[0225] In the above method for updating routing information, in a multi-hop relay scenario, the first relay terminal can update routing information according to the first indication information sent by the network device, thereby providing an applicable routing information updating method for the multi-hop relay scenario where the terminal acts as a relay.

[0226] In some embodiments, the first relay terminal may update routing information according to the monitoring result of the direct communication interface.

[0227] In some embodiments, the monitoring result of the direct communication interface includes but is not limited to at least one of the following:

[0228] a channel quality monitoring result of a direct communication interface between the first relay terminal and a second relay terminal connected to the first relay terminal via PC5-S;

[0229] a channel quality monitoring result of a direct communication interface between the first relay terminal and a second relay terminal having a PC5-RRC connection with the first relay terminal;

[0230] a channel quality monitoring result of a direct communication interface between the first relay terminal and a first remote terminal connected to the first relay terminal via PC5-S;

[0231] a channel quality monitoring result of a direct communication interface between the first relay terminal and a first remote terminal having a PC5-RRC connection with the first relay terminal;

[0232] A channel quality monitoring result of at least one serving cell of the first relay terminal.

[0233] In some embodiments, the channel quality monitoring result of the direct communication interface includes:

[0234] Direct communication interface discovery reference symbol received power (Signal Detection Reference Signal Received Power, SD-RSRP) and / or direct communication interface communication reference symbol received power (SideLink Reference Signal Received Power, SL-RSRP).

[0235] SD-RSRP is a parameter used to evaluate the signal quality of a direct communication interface based on sidelink communication messages. SL-RSRP is also a parameter used to evaluate the channel quality of a direct communication interface based on sidelink discovery messages. In wireless communications, reference symbols are typically used for synchronization, channel estimation, and signal quality measurement. RSRP is a measure of received power, used to measure the strength of reference symbols at the receiving end.

[0236] In some embodiments, the updating of routing information according to the channel quality monitoring result may include, but is not limited to: if the channel quality monitoring result is lower than or equal to a preset threshold, deleting routing information associated with the channel quality monitoring result.

[0237] When the channel quality monitoring result is lower than or equal to the preset threshold, it indicates that the channel quality is poor. At this time, the routing information associated with the channel quality detection result is deleted, and the routing information related to the direct communication interface with better channel quality is retained first, which can ensure the transmission rate of subsequent use of the routing information.

[0238] In some embodiments, the above-mentioned updating of routing information based on the channel quality monitoring results may include but is not limited to: if the channel quality monitoring results are higher than a preset threshold, the first relay terminal establishes a direct communication interface connection with the second relay terminal, and / or the first remote terminal; if the direct communication interface connection is successfully established, the routing information related to the direct communication interface connection is saved.

[0239] When the channel quality monitoring result is higher than the preset threshold, it means that the channel quality is good. At this time, the first relay terminal establishes a direct communication interface connection with the second relay terminal, and / or the first remote terminal, and when the establishment is successful, the routing information related to the direct communication interface connection is saved. The routing information related to the direct communication interface with better channel quality can be retained first, and the transmission rate of the subsequent use of the routing information can be guaranteed.

[0240] In some embodiments, the values ​​of the above-mentioned preset thresholds may be the same or different for different situations in which the first relay terminal is connected to other terminals (the second relay terminal or the first remote terminal) via the Uu interface and the PC5 interface.

[0241] Exemplarily, when routing information deletion and / or routing information modification occurs, if there is a remote terminal that is using the routing information for U2N communication or U2U communication, routing reselection is performed for the remote terminal and / or indication information is sent to the remote terminal to trigger the remote terminal to perform routing reselection.

[0242] In the above method for updating routing information, in a multi-hop relay scenario, the first relay terminal can update routing information according to the monitoring result of the direct communication interface, thereby providing an applicable routing information updating method for the multi-hop relay scenario where the terminal acts as a relay.

[0243] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0244] Based on the same inventive concept, an embodiment of the present disclosure also provides a first relay terminal. For example, Figure 11 is a schematic structural diagram of a relay terminal provided in one embodiment. The relay terminal includes: a memory 1101, a transceiver 1102, and a processor 1103, wherein the memory 1101, transceiver 1102, and processor 1103 are connected via a bus interface.

[0245] The memory 1101 is used to store computer programs; the transceiver 1102 is used to send and receive data under the control of the processor 1103; the processor 1103 is used to read the computer program in the memory 1101 and perform the following operations:

[0246] updating routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0247] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0248] The first node is at least one of the following:

[0249] a second relay terminal;

[0250] a first remote terminal;

[0251] Network equipment.

[0252] In one embodiment, if the first node is a second relay terminal, the first indication information includes at least one of the following:

[0253] activating a relay function by the second relay terminal;

[0254] Deactivating the relay function of the second relay terminal;

[0255] The relay function of the second relay terminal is changed;

[0256] a change in the target remote end accessible to the second relay terminal;

[0257] a change in the target cell accessible to the second relay terminal;

[0258] the second relay terminal switching instruction information;

[0259] A wireless link failure occurs on the Uu interface between the second relay terminal and the network device;

[0260] A wireless link failure occurs on the PC5 interface between the second relay terminal and the second remote terminal;

[0261] A wireless link failure occurs on the PC5 interface between the second relay terminal and a third relay terminal, and the third relay terminal is a relay terminal different from the first relay terminal.

[0262] In one embodiment, the relay function includes at least one of the following:

[0263] L2 relay;

[0264] L3 trunking;

[0265] U2N relay;

[0266] U2U relay;

[0267] Multi-hop relay.

[0268] In one embodiment, when the processor 1103 executes the computer program, the processor 1103 further implements the following steps:

[0269] If the first node is a second relay terminal, updating routing information according to the first indication information includes:

[0270] Perform at least one of the following according to the first indication information sent by the second relay terminal:

[0271] Adding routing information with the second relay terminal as the previous hop node;

[0272] Adding routing information with the second relay terminal as the next hop node;

[0273] Deleting routing information with the second relay terminal as the previous hop node;

[0274] Deleting routing information with the second relay terminal as the next hop node;

[0275] changing the target remote terminal corresponding to the routing information associated with the second relay terminal;

[0276] The target network device corresponding to the routing information associated with the second remote terminal is changed.

[0277] In one embodiment, if the first node is the first remote terminal, the first indication information includes at least one of the following:

[0278] The first remote terminal is about to perform relay terminal reselection;

[0279] The first remote terminal is about to be shut down.

[0280] In one embodiment, when the processor 1103 executes the computer program, the processor 1103 further implements the following steps:

[0281] The updating of routing information according to the first instruction information includes at least one of the following:

[0282] Deleting, according to the first indication information sent by the first remote terminal, routing information with the first remote terminal as the previous hop node;

[0283] According to the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the next hop node is deleted.

[0284] In one embodiment, if the first node is the network device, the first indication information includes at least one of the following:

[0285] RRC connection release message;

[0286] Switch configuration information.

[0287] In one embodiment, when the processor 1103 executes the computer program, the processor 1103 further implements the following steps:

[0288] The updating of routing information according to the first indication information includes:

[0289] Perform at least one of the following according to the first indication information sent by the network device:

[0290] Deleting routing information with the network device as the previous hop node;

[0291] Deleting routing information with the network device as a target node;

[0292] Modify the target node in the routing information to the target cell after handover.

[0293] Modify the routing information with the network device as the next hop node.

[0294] In one embodiment, the channel quality monitoring result of the direct communication interface includes:

[0295] The direct communication interface discovers a reference symbol received power SD-RSRP, and / or the direct communication interface communicates a reference symbol received power SL-RSRP.

[0296] In one embodiment, when the processor 1103 executes the computer program, the processor 1103 further implements the following steps:

[0297] The updating of routing information according to the channel quality monitoring result includes:

[0298] If the channel quality monitoring result is lower than or equal to a preset threshold, the routing information associated with the channel quality monitoring result is deleted.

[0299] In one embodiment, when the processor 1103 executes the computer program, the processor 1103 further implements the following steps:

[0300] The updating of routing information according to the channel quality monitoring result includes:

[0301] If the channel quality monitoring result is higher than a preset threshold, the first relay terminal establishes a direct communication interface connection with the second relay terminal and / or the first remote terminal;

[0302] If the connection of the direct communication interface is successfully established, then the routing information related to the direct communication interface connection is saved.

[0303] In one embodiment, when the processor 1103 executes the computer program, the processor 1103 further implements the following steps:

[0304] If the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends indication information to the remote terminal, wherein the indication information is used to trigger the remote terminal to perform routing reselection.

[0305] Those skilled in the art will understand that the structure shown in FIG11 is merely a block diagram of a portion of the structure related to the solution of the present disclosure, and does not constitute a limitation on the computer device to which the solution of the present disclosure is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0306] Based on the same inventive concept, an embodiment of the present disclosure further provides a first relay terminal for implementing the above-mentioned method for updating routing information. The implementation solution provided by the first relay terminal is similar to the implementation solution described in the above-mentioned method. Therefore, the specific limitations in the embodiment of the first relay terminal provided below can be found in the above-mentioned limitations on the method for updating routing information and will not be repeated here.

[0307] In an exemplary embodiment, FIG12 is a structural block diagram of a first relay terminal, comprising: an updating module 1201 for updating routing information according to the first indication information and / or the monitoring result of the direct communication interface;

[0308] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0309] The first node is at least one of the following:

[0310] a second relay terminal;

[0311] a first remote terminal;

[0312] Network equipment.

[0313] In one embodiment, if the first node is a second relay terminal, the first indication information includes at least one of the following:

[0314] activating a relay function by the second relay terminal;

[0315] Deactivating the relay function of the second relay terminal;

[0316] The relay function of the second relay terminal is changed;

[0317] a change in the target remote end accessible to the second relay terminal;

[0318] a change in the target cell accessible to the second relay terminal;

[0319] the second relay terminal switching instruction information;

[0320] A wireless link failure occurs on the Uu interface between the second relay terminal and the network device;

[0321] A wireless link failure occurs on the PC5 interface between the second relay terminal and the second remote terminal;

[0322] A wireless link failure occurs on the PC5 interface between the second relay terminal and a third relay terminal, and the third relay terminal is a relay terminal different from the first relay terminal.

[0323] In one embodiment, the relay function includes at least one of the following:

[0324] L2 relay;

[0325] L3 trunking;

[0326] U2N relay;

[0327] U2U relay;

[0328] Multi-hop relay.

[0329] In one embodiment, the update module 1201 is specifically configured to:

[0330] If the first node is a second relay terminal, updating routing information according to the first indication information includes:

[0331] Perform at least one of the following according to the first indication information sent by the second relay terminal:

[0332] Adding routing information with the second relay terminal as the previous hop node;

[0333] Adding routing information with the second relay terminal as the next hop node;

[0334] Deleting routing information with the second relay terminal as the previous hop node;

[0335] Deleting routing information with the second relay terminal as the next hop node;

[0336] changing the target remote terminal corresponding to the routing information associated with the second relay terminal;

[0337] The target network device corresponding to the routing information associated with the second remote terminal is changed.

[0338] In one embodiment, if the first node is the first remote terminal, the first indication information includes at least one of the following:

[0339] The first remote terminal is about to perform relay terminal reselection;

[0340] The first remote terminal is about to be shut down.

[0341] In one embodiment, the update module 1201 is specifically configured to:

[0342] The updating of routing information according to the first instruction information includes at least one of the following:

[0343] Deleting, according to the first indication information sent by the first remote terminal, routing information with the first remote terminal as the previous hop node;

[0344] According to the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the next hop node is deleted.

[0345] In one embodiment, if the first node is the network device, the first indication information includes at least one of the following:

[0346] RRC connection release message;

[0347] Switch configuration information.

[0348] In one embodiment, the update module 1201 is specifically configured to:

[0349] The updating of routing information according to the first indication information includes:

[0350] Perform at least one of the following according to the first indication information sent by the network device:

[0351] Deleting routing information with the network device as the previous hop node;

[0352] Deleting routing information with the network device as a target node;

[0353] Modify the target node in the routing information to the target cell after handover.

[0354] Modify the routing information with the network device as the next hop node.

[0355] In one embodiment, the channel quality monitoring result of the direct communication interface includes:

[0356] The direct communication interface discovers a reference symbol received power SD-RSRP, and / or the direct communication interface communicates a reference symbol received power SL-RSRP.

[0357] In one embodiment, updating routing information according to the channel quality monitoring result includes:

[0358] If the channel quality monitoring result is lower than or equal to a preset threshold, the routing information associated with the channel quality monitoring result is deleted.

[0359] In one embodiment, the update module 1201 is specifically configured to:

[0360] The updating of routing information according to the channel quality monitoring result includes:

[0361] If the channel quality monitoring result is higher than a preset threshold, the first relay terminal establishes a direct communication interface connection with the second relay terminal and / or the first remote terminal;

[0362] If the connection of the direct communication interface is successfully established, then the routing information related to the direct communication interface connection is saved.

[0363] In one embodiment, the update module 1201 is further configured to:

[0364] If the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends indication information to the remote terminal, wherein the indication information is used to trigger the remote terminal to perform routing reselection.

[0365] Based on the same inventive concept, an embodiment of the present disclosure further provides a computer-readable storage medium for implementing the above-mentioned method of updating routing information, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0366] updating routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0367] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0368] The first node is at least one of the following:

[0369] a second relay terminal;

[0370] a first remote terminal;

[0371] Network equipment.

[0372] Based on the same inventive concept, an embodiment of the present disclosure further provides a computer program product for implementing the above-mentioned method for updating routing information, including a computer program. When the computer program is executed by a processor, the following steps are implemented:

[0373] updating routing information according to the first indication information and / or a monitoring result of the direct communication interface;

[0374] The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal;

[0375] The first node is at least one of the following:

[0376] a second relay terminal;

[0377] a first remote terminal;

[0378] Network equipment.

[0379] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in the present disclosure may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this disclosure may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in each embodiment provided in this disclosure may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0380] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0381] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present disclosure. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. A method for updating routing information, wherein: Applied to a first relay terminal, the method includes: updating routing information according to the first indication information and / or the monitoring result of the direct communication interface; The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal; The first node is at least one of the following: a second relay terminal; a first remote terminal; Network equipment.

2. The method according to claim 1, wherein: If the first node is a second relay terminal, the first indication information includes at least one of the following: The second relay terminal activates a relay function; The second relay terminal deactivates the relay function; The relay function of the second relay terminal is changed; The target remote end accessible by the second relay terminal changes; The target cell accessible to the second relay terminal changes; The second relay terminal switching indication information; A wireless link failure occurs on the Uu interface between the second relay terminal and the network device; A wireless link failure occurs on the PC5 interface between the second relay terminal and the second remote terminal; A wireless link failure occurs at the PC5 interface between the second relay terminal and a third relay terminal, and the third relay terminal is another relay terminal different from the first relay terminal.

3. The method according to claim 2, wherein: The relay function includes at least one of the following: L2 relay; L3 trunk; U2N relay; U2U relay; Multi-hop relay.

4. The method according to claim 1, wherein: If the first node is a second relay terminal, updating routing information according to the first indication information includes: According to the first indication information sent by the second relay terminal, perform at least one of the following: Adding routing information with the second relay terminal as the previous hop node; Adding routing information with the second relay terminal as the next hop node; Deleting routing information with the second relay terminal as the previous hop node; Deleting routing information with the second relay terminal as the next hop node; changing the target remote terminal corresponding to the routing information associated with the second relay terminal; The target network device corresponding to the routing information associated with the second remote terminal is changed.

5. The method according to claim 1, wherein: If the first node is the first remote terminal, the first indication information includes at least one of the following: The first remote terminal is about to perform relay terminal reselection; The first remote terminal is about to be shut down.

6. The method according to claim 5, wherein: The updating of routing information according to the first indication information includes at least one of the following: Deleting, according to the first indication information sent by the first remote terminal, routing information with the first remote terminal as a previous hop node; According to the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the next hop node is deleted.

7. The method according to claim 1, wherein: If the first node is the network device, the first indication information includes at least one of the following: RRC connection release message; Toggle configuration information.

8. The method according to claim 7, wherein: The updating of routing information according to the first indication information includes: According to the first indication information sent by the network device, perform at least one of the following: Deleting routing information with the network device as the previous hop node; Deleting routing information with the network device as a target node; Modify the target node in the routing information to the target cell after the handover; Modify the routing information with the network device as the next hop node.

9. The method according to claim 1, wherein: The monitoring result of the direct communication interface includes at least one of the following: a channel quality monitoring result of a direct communication interface between the first relay terminal and a second relay terminal having a PC5-S and / or PC5-RRC connection with the first relay terminal; a channel quality monitoring result of a direct communication interface between the first relay terminal and a first remote terminal having a PC5-S and / or PC5-RRC connection with the first relay terminal; a channel quality monitoring result of at least one serving cell of the first relay terminal.

10. The method according to claim 9, wherein: The channel quality monitoring result of the direct communication interface includes: The direct communication interface discovers a reference symbol received power SD-RSRP, and / or the direct communication interface communicates a reference symbol received power SL-RSRP.

11. The method according to claim 9 or 10, wherein: The updating of routing information according to the channel quality monitoring result includes: If the channel quality monitoring result is lower than or equal to a preset threshold, the routing information associated with the channel quality monitoring result is deleted.

12. The method according to claim 9 or 10, wherein: The updating of routing information according to the channel quality monitoring result includes: If the channel quality monitoring result is higher than a preset threshold, the first relay terminal establishes a direct communication interface connection with the second relay terminal and / or the first remote terminal; If the connection of the direct communication interface is established successfully, the routing information related to the direct communication interface connection is saved.

13. The method according to claim 1, wherein: The method further comprises: If the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends indication information to the remote terminal, wherein the indication information is used to trigger the remote terminal to perform route reselection.

14. A first relay terminal, wherein: include: Memory for storing computer programs; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: updating routing information according to the first indication information and / or the monitoring result of the direct communication interface; The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal; The first node is at least one of the following: a second relay terminal; a first remote terminal; Network equipment.

15. The first relay terminal according to claim 14, wherein: If the first node is a second relay terminal, the first indication information includes at least one of the following: The second relay terminal activates a relay function; The second relay terminal deactivates the relay function; The relay function of the second relay terminal is changed; The target remote end accessible by the second relay terminal changes; The target cell accessible to the second relay terminal changes; The second relay terminal switching indication information; A wireless link failure occurs on the Uu interface between the second relay terminal and the network device; A wireless link failure occurs on the PC5 interface between the second relay terminal and the second remote terminal; A wireless link failure occurs at the PC5 interface between the second relay terminal and a third relay terminal, and the third relay terminal is another relay terminal different from the first relay terminal.

16. The first relay terminal according to claim 15, wherein: The relay function includes at least one of the following: L2 relay; L3 trunk; U2N relay; U2U relay; Multi-hop relay.

17. The first relay terminal according to claim 14, wherein: The processor is specifically configured to read the computer program in the memory and perform the following operations: If the first node is a second relay terminal, updating routing information according to the first indication information includes: According to the first indication information sent by the second relay terminal, perform at least one of the following: Adding routing information with the second relay terminal as the previous hop node; Adding routing information with the second relay terminal as the next hop node; Deleting routing information with the second relay terminal as the previous hop node; Deleting routing information with the second relay terminal as the next hop node; changing the target remote terminal corresponding to the routing information associated with the second relay terminal; The target network device corresponding to the routing information associated with the second remote terminal is changed.

18. The first relay terminal according to claim 14, wherein: If the first node is the first remote terminal, the first indication information includes at least one of the following: The first remote terminal is about to perform relay terminal reselection; The first remote terminal is about to be shut down.

19. The first relay terminal according to claim 18, wherein: The processor is specifically configured to read the computer program in the memory and perform the following operations: The updating of routing information according to the first indication information includes at least one of the following: Deleting, according to the first indication information sent by the first remote terminal, routing information with the first remote terminal as a previous hop node; According to the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the next hop node is deleted.

20. The first relay terminal according to claim 14, wherein: If the first node is the network device, the first indication information includes at least one of the following: RRC connection release message; Toggle configuration information.

21. The first relay terminal according to claim 20, wherein: The processor is specifically configured to read the computer program in the memory and perform the following operations: According to the first indication information sent by the network device, perform at least one of the following: Deleting routing information with the network device as the previous hop node; Deleting routing information with the network device as a target node; Modify the target node in the routing information to the target cell after the handover; Modify the routing information with the network device as the next hop node.

22. The first relay terminal according to claim 14, wherein: The monitoring result of the direct communication interface includes at least one of the following: a channel quality monitoring result of a direct communication interface between the first relay terminal and a second relay terminal having a PC5-S and / or PC5-RRC connection with the first relay terminal; a channel quality monitoring result of a direct communication interface between the first relay terminal and a first remote terminal having a PC5-S and / or PC5-RRC connection with the first relay terminal; a channel quality monitoring result of at least one serving cell of the first relay terminal.

23. The first relay terminal according to claim 22, wherein: The channel quality monitoring result of the direct communication interface includes: The direct communication interface discovers a reference symbol received power SD-RSRP, and / or the direct communication interface communicates a reference symbol received power SL-RSRP.

24. The first relay terminal according to claim 22 or 23, wherein: The processor is specifically configured to read the computer program in the memory and perform the following operations: If the channel quality monitoring result is lower than or equal to a preset threshold, the routing information associated with the channel quality monitoring result is deleted.

25. The first relay terminal according to claim 22 or 23, wherein: The processor is specifically configured to read the computer program in the memory and perform the following operations: If the channel quality monitoring result is higher than a preset threshold, the first relay terminal establishes a direct communication interface connection with the second relay terminal and / or the first remote terminal; If the connection of the direct communication interface is established successfully, the routing information related to the direct communication interface connection is saved.

26. The first relay terminal according to claim 14, wherein: The processor is further configured to read the computer program in the memory and perform the following operations: If the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends indication information to the remote terminal, wherein the indication information is used to trigger the remote terminal to perform route reselection.

27. A first relay terminal, wherein: include: An updating module, configured to update routing information according to the first indication information and / or a monitoring result of the direct communication interface; The first indication information is used to indicate a state change of a first node on a path associated with the first relay terminal; The first node is at least one of the following: a second relay terminal; a first remote terminal; Network equipment.

28. The first relay terminal according to claim 27, wherein: If the first node is a second relay terminal, the first indication information includes at least one of the following: The second relay terminal activates a relay function; The second relay terminal deactivates the relay function; The relay function of the second relay terminal is changed; The target remote end accessible by the second relay terminal changes; The target cell accessible to the second relay terminal changes; The second relay terminal switching indication information; A wireless link failure occurs on the Uu interface between the second relay terminal and the network device; A wireless link failure occurs on the PC5 interface between the second relay terminal and the second remote terminal; A wireless link failure occurs at the PC5 interface between the second relay terminal and a third relay terminal, and the third relay terminal is another relay terminal different from the first relay terminal.

29. The first relay terminal according to claim 28, wherein: The relay function includes at least one of the following: L2 relay; L3 trunk; U2N relay; U2U relay; Multi-hop relay.

30. The first relay terminal according to claim 27, wherein: If the first node is a second relay terminal, the updating module is specifically configured to: According to the first indication information sent by the second relay terminal, perform at least one of the following: Adding routing information with the second relay terminal as the previous hop node; Adding routing information with the second relay terminal as the next hop node; Deleting routing information with the second relay terminal as the previous hop node; Deleting routing information with the second relay terminal as the next hop node; changing the target remote terminal corresponding to the routing information associated with the second relay terminal; The target network device corresponding to the routing information associated with the second remote terminal is changed.

31. The first relay terminal according to claim 1, wherein: If the first node is the first remote terminal, the first indication information includes at least one of the following: The first remote terminal is about to perform relay terminal reselection; The first remote terminal is about to be shut down.

32. The first relay terminal according to claim 31, wherein: The updating of routing information according to the first indication information includes at least one of the following: Deleting, according to the first indication information sent by the first remote terminal, routing information with the first remote terminal as a previous hop node; According to the first indication information sent by the first remote terminal, the routing information with the first remote terminal as the next hop node is deleted.

33. The first relay terminal according to claim 27, wherein: If the first node is the network device, the first indication information includes at least one of the following: RRC connection release message; Toggle configuration information.

34. The first relay terminal according to claim 33, wherein: The update module is specifically used for: According to the first indication information sent by the network device, perform at least one of the following: Deleting routing information with the network device as the previous hop node; Deleting routing information with the network device as a target node; Modify the target node in the routing information to the target cell after the handover; Modify the routing information with the network device as the next hop node.

35. The first relay terminal according to claim 27, wherein: The monitoring result of the direct communication interface includes at least one of the following: a channel quality monitoring result of a direct communication interface between the first relay terminal and a second relay terminal having a PC5-S and / or PC5-RRC connection with the first relay terminal; a channel quality monitoring result of a direct communication interface between the first relay terminal and a first remote terminal having a PC5-S and / or PC5-RRC connection with the first relay terminal; a channel quality monitoring result of at least one serving cell of the first relay terminal.

36. The first relay terminal according to claim 35, wherein: The channel quality monitoring result of the direct communication interface includes: The direct communication interface discovers a reference symbol received power SD-RSRP, and / or the direct communication interface communicates a reference symbol received power SL-RSRP.

37. The first relay terminal according to claim 35 or 36, wherein: The update module is specifically used for: If the channel quality monitoring result is lower than or equal to a preset threshold, the routing information associated with the channel quality monitoring result is deleted.

38. The first relay terminal according to claim 35 or 36, wherein: The update module is specifically used for: If the channel quality monitoring result is higher than a preset threshold, the first relay terminal establishes a direct communication interface connection with the second relay terminal and / or the first remote terminal; If the connection of the direct communication interface is established successfully, the routing information related to the direct communication interface connection is saved.

39. The first relay terminal according to claim 27, wherein: The update module is further used for: If the routing information is updated, the first relay terminal reselects a route for the remote terminal using the routing information, or sends indication information to the remote terminal, wherein the indication information is used to trigger the remote terminal to perform route reselection.

40. A computer-readable storage medium having a computer program stored thereon, wherein: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 13 are implemented.

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