Path switching method and apparatus, terminal, and storage medium

Abstract

This application discloses a path switching method, apparatus, terminal, and storage medium, belonging to the field of communication technology. The method includes: a remote terminal receiving handover-related information sent by a network-side device. This information includes: resource configuration of at least one handover target and at least one set of execution conditions, wherein each handover target corresponds to one set of execution conditions; if any execution condition is satisfied, the remote terminal switches from a first path to a second path based on the resource configuration of the handover target associated with the satisfied execution conditions; wherein the first path includes a non-directly connected path, and the second path includes a directly connected path or a non-directly connected path; the execution conditions include: the remote terminal determining that the PC5 link is abnormal and / or the Uu link is abnormal. This application's embodiments improve the handover robustness in Sidelink relay scenarios by determining whether path switching should be performed by judging whether the PC5 and / or Uu air interfaces meet the conditions.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and specifically relates to a path switching method, device, terminal and storage medium. Background Technology

[0002] Relay technology in wireless communication systems involves adding one or more relay nodes between the base station and the terminal. These relay nodes are responsible for forwarding the wireless signal one or more times, meaning the wireless signal has to go through multiple hops to reach the remote terminal.

[0003] The base station can only guarantee a successful handover by sending Radio Resource Control (RRC) reconfiguration messages (handover commands) under conditions of good air interface radio link quality. To improve handover performance, the closest existing technology is the conditional handover (CHO) scheme; however, the CHO scheme cannot be directly reused in sidelink relay scenarios. Summary of the Invention

[0004] The purpose of this application is to provide a path switching method, device, terminal, and storage medium that can determine appropriate path switching conditions based on the characteristics of the Sidelink relay scenario.

[0005] Firstly, a path switching method is provided, which includes:

[0006] The remote terminal receives handover-related information sent by the network-side device. The handover-related information includes: resource configuration of at least one handover target, and at least one set of execution conditions, wherein each handover target corresponds to one set of execution conditions.

[0007] If the remote terminal determines that any of the execution conditions are met, the remote terminal switches from the first path to the second path based on the resource configuration of the switching target associated with the met execution conditions;

[0008] The first path includes a non-direct connection path through which the remote terminal communicates with the network-side device via the first relay terminal, and the second path includes a direct connection path or a non-direct connection path through which the remote terminal communicates with the switching target.

[0009] The execution conditions include: the remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal and / or the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate that the Uu link between the first relay terminal and the network-side device is abnormal.

[0010] Secondly, a path switching method is provided, which includes:

[0011] The first relay terminal sends a first indication message to the remote terminal, the first indication message being used to indicate a Uu link anomaly.

[0012] Thirdly, a path switching device is provided, the device comprising:

[0013] The first receiving module is used to receive handover-related information sent by the network-side device. The handover-related information includes: resource configuration of at least one handover target, and at least one set of execution conditions, wherein each handover target corresponds to one set of execution conditions.

[0014] The first switching module is configured to, when the remote terminal determines that any of the execution conditions are met, switch from the first path to the second path based on the resource configuration of the switching target associated with the met execution conditions;

[0015] The first path includes a non-direct connection path through which the remote terminal communicates with the network-side device via the first relay terminal, and the second path includes a direct connection path or a non-direct connection path through which the remote terminal communicates with the switching target.

[0016] The execution conditions include: the remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal and / or the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate that the Uu link between the first relay terminal and the network-side device is abnormal.

[0017] Fourthly, a path switching device is provided, the device comprising:

[0018] The first sending module is used to send first indication information to the remote terminal, the first indication information being used to indicate a Uu link abnormality.

[0019] Fifthly, a remote terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0020] In a sixth aspect, a relay terminal is provided, the relay terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the second aspect.

[0021] In a seventh aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0022] Eighthly, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0023] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario. Attached Figure Description

[0024] Figure 1 This is a block diagram of a wireless communication system applicable to embodiments of this application;

[0025] Figure 2 This is one of the flowcharts illustrating the path switching method provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of a scenario for the UE-to-Network Relay mechanism provided in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the process of a remote terminal switching to a directly connected Uu cell provided in an embodiment of this application;

[0028] Figure 5 This is a second flowchart illustrating the path switching method provided in the embodiments of this application;

[0029] Figure 6 This is one of the structural schematic diagrams of the path switching device provided in the embodiments of this application;

[0030] Figure 7 This is a second schematic diagram of the path switching device provided in the embodiments of this application;

[0031] Figure 8 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application;

[0032] Figure 9 This is a schematic diagram of the hardware structure of the remote terminal provided in the embodiments of this application;

[0033] Figure 10 This is a schematic diagram of the hardware structure of the first relay terminal provided in the embodiments of this application.

[0034] Figure 11 This is a schematic diagram of the hardware structure of the network-side device provided in the embodiments of this application. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0036] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but 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), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description is for illustrative purposes and uses the term NR in most of the following description. However, these technologies can also be applied to applications other than NR systems, such as 6th Generation (6G) communication systems and Long Term Evolution (LTE) communication systems.

[0038] Figure 1This is a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include wristbands, headphones, glasses, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, 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 this embodiment of the application, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0039] The path switching method and apparatus provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0040] Figure 2 This is one of the flowcharts illustrating the path switching method provided in the embodiments of this application, such as... Figure 2 As shown, the method includes the following steps:

[0041] Step 200: The remote terminal receives handover-related information sent by the network-side device. The handover-related information includes: resource configuration of at least one handover target, and at least one set of execution conditions, wherein each handover target corresponds to one set of execution conditions.

[0042] Step 210: If the remote terminal determines that any of the execution conditions are met, the remote terminal switches from the first path to the second path based on the resource configuration of the switching target associated with the met execution conditions.

[0043] The first path includes a non-direct connection path through which the remote terminal communicates with the network-side device via the first relay terminal, and the second path includes a direct connection path or a non-direct connection path through which the remote terminal communicates with the switching target.

[0044] The execution conditions include: the remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal and / or the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate that the Uu link between the first relay terminal and the network-side device is abnormal.

[0045] Optionally, wireless relay technology can not only extend cell coverage and fill coverage blind spots, but also increase cell capacity through spatial resource reuse. For indoor coverage, relay technology can also overcome penetration loss and improve indoor coverage quality.

[0046] Taking a simple two-hop relay as an example, wireless relay splits a base station-terminal link into two links: base station-relay station and relay station-terminal. This allows a link with poor quality to be replaced with two links with better quality, thereby achieving higher link capacity and better coverage.

[0047] Currently, the relay terminals supported in communication systems are UE-to-Network relays, meaning that one end of the relay connects to the UE, and the other end connects to the network. The UE connected to the relay is called a remote UE.

[0048] Optionally, in various embodiments of this application, the non-directly connected path in the first path refers to the communication link through which the remote terminal establishes a Radio Resource Control (RRC) connection with the network side via the first relay terminal and forwards uplink and downlink data.

[0049] Optionally, in various embodiments of this application, the direct connection path in the second path refers to the communication link through which the remote terminal establishes an RRC connection with the network side via the handover target (first target cell) and directly sends and receives uplink and downlink data.

[0050] Optionally, in various embodiments of this application, the non-directly connected path in the second path refers to the communication link through which the remote terminal establishes an RRC connection with the network side and forwards uplink and downlink data.

[0051] Figure 3 This is a schematic diagram of a scenario for the UE-to-Network Relay mechanism provided in the embodiments of this application, such as... Figure 3 The diagram illustrates a UE-to-Network scenario where a remote UE needs to transmit data with the network. However, due to poor coverage, a relay UE is used as a relay. The relay UE connects to the base station via a Uu interface, while the relay UE and the remote UE connect via a sidelink (PC5) interface. Generally, the relay UE is open and can serve any remote UE.

[0052] Figure 4 This is a schematic diagram of the process of a remote terminal switching to a directly connected Uu cell, as provided in the embodiments of this application. Figure 4 As shown, it includes the following steps:

[0053] Step 0: The Remote UE establishes an RRC connection with the base station through the Relay UE and performs uplink and downlink data transmission and reception.

[0054] Step 1: The Remote UE reports the measurement results to the base station.

[0055] Step 2: The base station decides to switch the Remote UE to a specific cell.

[0056] Step 3: The base station sends an RRC reconfiguration message (handover command) to the Remote UE, and the RRC reconfiguration message (handover command) is forwarded by the Relay UE.

[0057] Step 4: The Remote UE initiates random access to the target Cell and establishes an RRC connection.

[0058] Step 5: The Remote UE sends an RRC reconfiguration complete message (handover complete) to the target cell.

[0059] Step 6: The base station sends an RRC reconfiguration message to the Relay UE, which releases the relevant PC5 and Uu backhual configurations for providing relay services to the Remote UE. The Relay UE then sends an RRC reconfiguration complete message to the base station.

[0060] Step 7: Optionally, the Relay UE releases the PC5 RRC connection with the Remote UE.

[0061] Step 8: The Remote UE directly transmits and receives uplink and downlink data with the target cell.

[0062] In step 3 above, the base station sending the RRC reconfiguration message (handover command) can only guarantee a successful handover if the air interface radio link quality is good. To improve handover performance, the closest existing technical solution is the conditional handover (CHO) scheme, but the CHO scheme cannot be directly reused in the sidelink relay scenario.

[0063] Based on this, each embodiment of this application considers the characteristics of the Sidelink relay scenario, determines that the PC5 link between the first relay terminals is abnormal and / or the Uu link between the first relay terminal and the network-side device is abnormal, and performs path switching.

[0064] Optionally, the remote terminal may first receive handover-related information sent by the network-side device, wherein the handover-related information includes: resource configuration of at least one handover target, and at least one set of execution conditions, and each handover target may correspond to the same or different set of execution conditions; that is, the remote terminal switches to a communication connection with the handover target only when the execution conditions corresponding to a certain handover target are met.

[0065] Optionally, each switching target may have only one execution condition or multiple execution conditions.

[0066] Optionally, if the target being switched corresponds to multiple execution conditions, a path switch is performed if any one of the execution conditions is met.

[0067] Optionally, if the target being switched corresponds to multiple execution conditions, and any two or more of the execution conditions are met, then a path switch is performed; the embodiments of this application do not limit this.

[0068] Optionally, if the remote terminal determines that any execution condition is met, the remote terminal may switch from the first path to the second path based on the resource configuration of the switching target corresponding to the met execution condition, and establish a communication connection with the switching target.

[0069] The first path includes a non-direct connection path through which the remote terminal communicates with the network-side device via the first relay terminal, and the second path includes a direct connection path or a non-direct connection path through which the remote terminal communicates with the switching target.

[0070] Taking the example of a remote terminal switching from an indirect path to a direct path under any execution condition, the path switching includes the following steps:

[0071] Step 0: The remote UE establishes an RRC connection with network-side equipment, such as a base station, through the first relay UE and performs uplink and downlink data transmission and reception; currently, it is an indirect path.

[0072] Step 1: The remote UE reports the measurement results to the base station;

[0073] Step 2: The base station decides to hand over the Remote UE to a specific handover target; that is, to the direct path.

[0074] Step 3: The base station sends an RRC reconfiguration message (i.e., a handover command, or handover-related information) to the Remote UE. The RRC reconfiguration message (handover command) is forwarded by the first relay terminal Relay UE.

[0075] The RRC reconfiguration message carries:

[0076] Resource configuration for at least one switching target, wherein different switching targets are distinguished by their respective unique identifiers;

[0077] And, at least one set of execution conditions;

[0078] Each of the switching targets can correspond to a set of execution conditions; the execution conditions are the resource configuration execution conditions of the application corresponding to the switching target.

[0079] The execution conditions include, but are not limited to:

[0080] The remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal;

[0081] And / or, the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate an abnormal Uu link between the first relay terminal and the network-side device.

[0082] Step 4: The Remote UE sends an RRC reconfiguration complete message (handover complete) to the base station. This RRC reconfiguration message (handover command) can be forwarded by the first relay terminal.

[0083] Step 5: The Remote UE evaluates the execution conditions received in Step 3 of this process. If it is determined that any execution condition is met, it initiates random access to the handover target associated with the met execution condition and establishes an RRC connection.

[0084] Step 6: The Remote UE and the handover target exchange uplink and downlink data.

[0085] Taking the example of a remote terminal switching from an indirect path to an indirect path under any execution condition, the path switching includes the following steps:

[0086] Step 0: The remote UE establishes an RRC connection with network-side equipment, such as a base station, through the first relay UE and performs uplink and downlink data transmission and reception; currently, it is an indirect path.

[0087] Step 1: The remote UE reports the measurement results to the base station;

[0088] Step 2: The base station decides to hand over the Remote UE to a specific handover target; that is, to another indirect path.

[0089] Step 3: The base station sends an RRC reconfiguration message (i.e., a handover command, or handover-related information) to the Remote UE. The RRC reconfiguration message (handover command) is forwarded by the first relay terminal Relay UE.

[0090] The RRC reconfiguration message carries:

[0091] Resource configuration for at least one switching target, wherein different switching targets are distinguished by their respective unique identifiers;

[0092] And, at least one set of execution conditions;

[0093] Each of the switching targets can correspond to a set of execution conditions; the execution conditions are the resource configuration execution conditions of the application corresponding to the switching target.

[0094] The execution conditions include, but are not limited to:

[0095] The remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal;

[0096] And / or, the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate an abnormal Uu link between the first relay terminal and the network-side device.

[0097] Step 4: The Remote UE sends an RRC reconfiguration complete message (handover complete) to the base station. This RRC reconfiguration message (handover command) can be forwarded by the first relay terminal.

[0098] Step 5: The Remote UE evaluates the execution conditions received in Step 3 of this process. If it is determined that any execution condition is met, an RRC connection is established to the handover target associated with the met execution condition.

[0099] Step 6: The Remote UE and the handover target exchange uplink and downlink data.

[0100] Optionally, the execution conditions may include, but are not limited to: the remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal and / or the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate that the Uu link between the first relay terminal and the network-side device is abnormal.

[0101] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0102] Optionally, if the first path includes a non-directly connected path and the second path includes a directly connected path, the handover target includes: a first target cell.

[0103] Optionally, if the first path includes an indirect path and the second path includes a direct path, that is, the remote terminal switches from an indirect path to a direct path, then at least one handover target includes at least one first target cell; wherein, different first target cells are identified by cell identity.

[0104] Optionally, if the remote terminal meets a set of execution conditions corresponding to the first target cell, it can switch from the indirect path to the direct path. In this case, the path switching includes the following steps:

[0105] Step 0: The remote UE establishes an RRC connection with network-side equipment, such as a base station, through the first relay UE and performs uplink and downlink data transmission and reception; currently, it is an indirect path.

[0106] Step 1: The remote UE reports the measurement results to the base station;

[0107] Step 2: The base station decides to hand over the Remote UE to a target cell; that is, to the direct path.

[0108] Step 3: The base station sends an RRC reconfiguration message (i.e., a handover command, or handover-related information) to the Remote UE. The RRC reconfiguration message (handover command) is forwarded by the first relay terminal Relay UE.

[0109] The RRC reconfiguration message carries:

[0110] Resource configuration for at least one switching target, wherein different switching targets are distinguished by their respective unique identifiers;

[0111] And, at least one set of execution conditions;

[0112] Each of the switching targets can correspond to a set of execution conditions; the execution conditions are the resource configuration execution conditions of the application corresponding to the switching target.

[0113] The execution conditions include, but are not limited to:

[0114] The remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal;

[0115] And / or, the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate an abnormal Uu link between the first relay terminal and the network-side device.

[0116] Step 4: The Remote UE sends an RRC reconfiguration complete message (handover complete) to the base station. This RRC reconfiguration message (handover command) can be forwarded by the first relay terminal.

[0117] Step 5: The Remote UE evaluates the execution conditions received in Step 3 of this process. If it determines that the execution conditions corresponding to the first target cell are met, it initiates random access to the first target cell and establishes an RRC connection.

[0118] Step 6: The Remote UE directly transmits and receives uplink and downlink data with the first target cell.

[0119] Optionally, if both the first path and the second path include non-directly connected paths, the switching target includes: a second target relay terminal.

[0120] Optionally, if the first path includes an indirect path and the second path includes an indirect path, that is, the remote terminal switches from an indirect path to an indirect path, then at least one switching target includes at least one second target relay terminal; wherein, different second target relay terminals are identified by the terminal identifier of the second target relay terminal.

[0121] Optionally, if the remote terminal meets a set of execution conditions corresponding to the second target relay terminal, it can switch from the indirect path to the indirect path. In this case, the path switching includes the following steps:

[0122] Step 0: The remote UE establishes an RRC connection with network-side equipment, such as a base station, through the first relay UE and performs uplink and downlink data transmission and reception; currently, it is an indirect path.

[0123] Step 1: The remote UE reports the measurement results to the base station;

[0124] Step 2: The base station decides to hand over the Remote UE to a target relay terminal; that is, to switch to an indirect path.

[0125] Step 3: The base station sends an RRC reconfiguration message (i.e., a handover command, or handover-related information) to the Remote UE. The RRC reconfiguration message (handover command) is forwarded by the first relay terminal Relay UE.

[0126] The RRC reconfiguration message carries:

[0127] Resource configuration for at least one second target relay terminal, wherein different second target relay terminals are distinguished by their respective terminal identifiers;

[0128] And, at least one set of execution conditions;

[0129] Each of the second target relay terminals can correspond to a set of execution conditions; the execution conditions are the resource configuration execution conditions of the corresponding second target relay terminal.

[0130] The execution conditions include, but are not limited to:

[0131] The remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal;

[0132] And / or, the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate an abnormal Uu link between the first relay terminal and the network-side device.

[0133] Step 4: The Remote UE sends an RRC reconfiguration complete message (handover complete) to the base station. This RRC reconfiguration message (handover command) can be forwarded by the first relay terminal.

[0134] Step 5: The Remote UE evaluates the execution conditions received in Step 3 of this process. If it determines that the execution conditions corresponding to the second target relay terminal are met, it establishes a PC5 RRC connection to the second target relay terminal, and then establishes an RRC connection with the base station through the second target relay terminal.

[0135] Step 6: The Remote UE transmits and receives uplink and downlink data through the second target relay terminal.

[0136] Optionally, the resource configuration of the second target relay terminal includes:

[0137] The resource configuration for establishing a PC5 RRC connection between the remote terminal and the second target relay terminal, and / or the resource configuration for establishing an RRC connection between the remote terminal and the network side through the second target relay terminal.

[0138] Optionally, when the remote terminal establishes a PC5 RRC connection with the second target relay terminal based on the resource configuration of the second target relay terminal, it is necessary to determine the resource configuration for establishing the PC5 RRC connection between the remote terminal and the second target relay terminal.

[0139] Optionally, when the remote terminal establishes an RRC connection with the base station through the second target relay terminal, it needs to determine the resource configuration for the remote terminal to establish an RRC connection with the network side through the second target relay terminal;

[0140] Therefore, the resource configuration of the second target relay terminal may include, but is not limited to:

[0141] The resource configuration for establishing a PC5 RRC connection between the remote terminal and the second target relay terminal, and the resource configuration for establishing an RRC connection between the remote terminal and the network side through the second target relay terminal.

[0142] Optionally, the resource configuration of the second target relay terminal may include, but is not limited to:

[0143] Resource configuration for establishing a PC5 RRC connection between the remote terminal and the second target relay terminal.

[0144] Optionally, the resource configuration of the second target relay terminal may include, but is not limited to:

[0145] The resource configuration for establishing an RRC connection between the remote terminal and the network side through the second target relay terminal.

[0146] Optionally, the resource configuration of at least one second target relay terminal includes the terminal identifier of at least one second target relay terminal;

[0147] The terminal identifier of the at least one second target relay terminal includes any one of the following:

[0148] Cell-RadioNetworkTemporaryIdentifier (C-RNTI), Inactive-RadioNetworkTemporaryIdentifier (I-RNTI), Destination L2 ID, 5G-S-Temporary MobileSubscriber Identity (5G-S-TMSI).

[0149] The terminal identifier of the at least one second target relay terminal includes any one of the following:

[0150] C-RNTI, I-RNTI, Destination L2 ID, TMSI of the communication system;

[0151] The communication system described in this embodiment is a 5G system for illustrative purposes, but it can also be applied to applications other than 5G systems, such as 6th Generation (6G) communication systems, such as Long Term Evolution (LTE) communication systems. This embodiment does not limit this application.

[0152] Optionally, in order to effectively distinguish at least one second target relay terminal, the terminal identifier of the second target relay terminal may be included in the resource configuration of the second target relay terminal;

[0153] Optionally, the terminal identifier of the second target relay terminal may also be associated with a set of execution conditions associated with the second target relay terminal.

[0154] Optionally, the resource configuration of at least one first target cell includes at least one cell identifier of the first target cell, such as cell identity;

[0155] Optionally, in order to effectively distinguish at least one first target cell, the cell identifier of the first target cell can be included in the resource configuration of the first target cell;

[0156] Optionally, the cell identifier of the first target cell can also be associated with a set of execution conditions associated with the first target cell.

[0157] Optionally, the remote terminal determines the PC5 link anomaly by including at least one of the following:

[0158] The PC5 channel busy rate (CBR) measured by the remote terminal exceeds the first threshold;

[0159] The PC5 channel occupancy rate (CR) measured by the remote terminal exceeds the second threshold;

[0160] The remote terminal determines that a wireless link failure (SL RLF) has occurred;

[0161] The remote terminal initiates the PC5 link release process.

[0162] Optionally, the remote terminal can determine that the PC5 link is abnormal based on the measured PC5 channel busy rate CBR exceeding a first threshold, wherein the PC5 channel busy rate CBR measured by the remote terminal is determined by at least one measurement of the SL discovery pool and the communication pool.

[0163] Optionally, the remote terminal can determine that the PC5 link is abnormal based on the measured PC5 channel occupancy rate CR exceeding the second threshold and exceeding the first threshold, wherein the PC5 channel occupancy rate CR measured by the remote terminal is determined based on at least one measurement of the SL discovery pool and the communication pool.

[0164] Optionally, the remote terminal can determine that the PC5 link is abnormal based on the remote terminal's determination of a radio link failure (SL RLF), that is, a radio link failure (RLF) has occurred on the sidelink between the remote terminal and the first relay terminal.

[0165] Optionally, the remote terminal can determine that the PC5 link is abnormal based on the operation of initiating the PC5 link release process;

[0166] Optionally, the remote terminal can determine that the PC5 link is abnormal based on any one or any combination of the following:

[0167] The PC5 channel busy ratio (CBR) measured by the remote terminal exceeds the first threshold;

[0168] The PC5 channel occupation ratio (CR) measured by the remote terminal exceeds the second threshold;

[0169] The remote terminal determines that a sidelink radio link failure (SLRLF) has occurred.

[0170] The remote terminal initiates the PC5 link release process.

[0171] Optionally, the first indication information includes:

[0172] Uu link quality related information; and / or

[0173] The handover indication information is sent by the first relay terminal based on the Uu link quality-related information.

[0174] Optionally, when the remote terminal receives the first indication information from the first relay terminal indicating a Uu link anomaly, the first indication information may include handover indication information, that is, the first relay terminal directly instructs the remote terminal to perform link handover through the first indication information.

[0175] Optionally, the switching indication information can be 1-bit indication information;

[0176] Optionally, the handover indication information is sent by the first relay terminal to the remote terminal after determining that the Uu link is abnormal based on Uu link quality-related information;

[0177] Optionally, when the remote terminal receives the first indication information from the first relay terminal indicating the current Uu link anomaly, the first indication information may include current Uu link quality related information. That is, the first relay terminal directly informs the remote terminal of the current Uu link status so that the remote terminal can determine the current Uu link anomaly and perform path switching.

[0178] Optionally, the Uu link quality-related information includes at least one of the following:

[0179] The first relay terminal determines that the quality of the serving cell it is in is below the third threshold;

[0180] The first relay terminal determines that the target cell quality is higher than the fourth threshold;

[0181] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0182] The first relay terminal determines that a Radio Resource Control (RRC) reconstruction failure has occurred;

[0183] The first relay terminal determines the information of RRC state transition, which includes transitioning from RRC connected state to RRC inactive state, or from RRC connected state to RRC idle state, or from RRC connected state to network coverage out-of-coverage state.

[0184] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal's relay service;

[0185] The first relay terminal determines the information to initiate the PC5 link release process;

[0186] The first relay terminal determines the information about the device malfunction.

[0187] Optionally, when the remote terminal receives first indication information from the first relay terminal indicating a current Uu link anomaly, the first indication information may include current Uu link quality-related information, that is, the first relay terminal directly informs the remote terminal of the current Uu link status, wherein the Uu link quality-related information may include any one or a combination of the following:

[0188] The first relay terminal determines that the quality of the serving cell it is in is lower than the third threshold. The specific threshold value of the third threshold can be pre-configured by the base station. The quality of the serving cell where the first relay terminal is located is obtained by the first relay terminal based on at least one of the following measurements: Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), Received Signal Strength Indicator (RSSI), and Signal to Interference plus Noise Ratio (SINR).

[0189] The first relay terminal determines that the target cell quality is higher than the fourth threshold. The specific threshold value of the fourth threshold can be pre-configured by the base station. The target cell quality determined by the first relay terminal is obtained by the first relay terminal based on at least one of RSRP / RSRQ / RSSI / SINR measurements.

[0190] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0191] The first relay terminal determines that a Radio Resource Control (RRC) reconstruction failure has occurred;

[0192] The first relay terminal determines the information of the RRC state transition, which includes transitioning from the RRC connected state to the RRC inactive state, or from the RRC connected state to the RRC idle state, or from the RRC connected state to the out-of-coverage (OOC) state.

[0193] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal relay service;

[0194] The first relay terminal determines the information to initiate the PC5 link release process;

[0195] The first relay terminal determines information about equipment malfunctions; for example, the first relay terminal may be unable to continue providing relay services to the remote terminal due to an abnormal situation, such as the first relay terminal having too low a battery.

[0196] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0197] Figure 5 This is a second flowchart illustrating the path switching method provided in this application embodiment, as shown below. Figure 5 As shown, the method includes the following steps:

[0198] Step 500: The first relay terminal sends a first indication message to the remote terminal, the first indication message being used to indicate an abnormal Uu link.

[0199] Optionally, in the event of a Uu link failure, the first relay terminal sends a first indication message to the remote terminal, indicating that the Uu link is abnormal, so that the remote terminal can perform a path switch.

[0200] Each embodiment of this application takes into account the characteristics of the Sidelink relay scenario, and determines that the PC5 link between the first relay terminals is abnormal and / or the Uu link between the first relay terminal and the network-side device is abnormal, and performs path switching.

[0201] Optionally, the remote terminal may first receive handover-related information sent by the network-side device, wherein the handover-related information includes: resource configuration of at least one handover target, and at least one set of execution conditions, and each handover target may correspond to the same or different set of execution conditions; that is, the remote terminal switches to a communication connection with the handover target only when the execution conditions corresponding to a certain handover target are met.

[0202] Optionally, each switching target may have only one execution condition or multiple execution conditions.

[0203] Optionally, if the target being switched corresponds to multiple execution conditions, a path switch is performed if any one of the execution conditions is met.

[0204] Optionally, if the target being switched corresponds to multiple execution conditions, and any two or more of the execution conditions are met, then a path switch is performed; the embodiments of this application do not limit this.

[0205] Optionally, if the remote terminal determines that any execution condition is met, the remote terminal may switch from the first path to the second path based on the resource configuration of the switching target corresponding to the met execution condition, and establish a communication connection with the switching target.

[0206] The first path includes a non-direct connection path through which the remote terminal communicates with the network-side device via the first relay terminal, and the second path includes a direct connection path or a non-direct connection path through which the remote terminal communicates with the switching target.

[0207] Taking the example of a remote terminal switching from an indirect path to a direct path under any execution condition, the path switching includes the following steps:

[0208] Step 0: The remote UE establishes an RRC connection with network-side equipment, such as a base station, through the first relay UE and performs uplink and downlink data transmission and reception; currently, it is an indirect path.

[0209] Step 1: The remote UE reports the measurement results to the base station;

[0210] Step 2: The base station decides to hand over the Remote UE to a specific handover target; that is, to the direct path.

[0211] Step 3: The base station sends an RRC reconfiguration message (i.e., a handover command, or handover-related information) to the Remote UE. The RRC reconfiguration message (handover command) is forwarded by the first relay terminal Relay UE.

[0212] The RRC reconfiguration message carries:

[0213] Resource configuration for at least one switching target, wherein different switching targets are distinguished by their respective unique identifiers;

[0214] And, at least one set of execution conditions;

[0215] Each of the switching targets can correspond to a set of execution conditions; the execution conditions are the resource configuration execution conditions of the application corresponding to the switching target.

[0216] The execution conditions include, but are not limited to:

[0217] The remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal;

[0218] And / or, the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate an abnormal Uu link between the first relay terminal and the network-side device.

[0219] Step 4: The Remote UE sends an RRC reconfiguration complete message (handover complete) to the base station. This RRC reconfiguration message (handover command) can be forwarded by the first relay terminal.

[0220] Step 5: The Remote UE evaluates the execution conditions received in Step 3 of this process. If it is determined that any execution condition is met, it initiates random access to the handover target associated with the met execution condition and establishes an RRC connection.

[0221] Step 6: The Remote UE and the handover target exchange uplink and downlink data.

[0222] Taking the example of a remote terminal switching from an indirect path to an indirect path under any execution condition, the path switching includes the following steps:

[0223] Step 0: The remote UE establishes an RRC connection with network-side equipment, such as a base station, through the first relay UE and performs uplink and downlink data transmission and reception; currently, it is an indirect path.

[0224] Step 1: The remote UE reports the measurement results to the base station;

[0225] Step 2: The base station decides to hand over the Remote UE to a specific handover target; that is, to another indirect path.

[0226] Step 3: The base station sends an RRC reconfiguration message (i.e., a handover command, or handover-related information) to the Remote UE. The RRC reconfiguration message (handover command) is forwarded by the first relay terminal Relay UE.

[0227] The RRC reconfiguration message carries:

[0228] Resource configuration for at least one switching target, wherein different switching targets are distinguished by their respective unique identifiers;

[0229] And, at least one set of execution conditions;

[0230] Each of the switching targets can correspond to a set of execution conditions; the execution conditions are the resource configuration execution conditions of the application corresponding to the switching target.

[0231] The execution conditions include, but are not limited to:

[0232] The remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal;

[0233] And / or, the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate an abnormal Uu link between the first relay terminal and the network-side device.

[0234] Step 4: The Remote UE sends an RRC reconfiguration complete message (handover complete) to the base station. This RRC reconfiguration message (handover command) can be forwarded by the first relay terminal.

[0235] Step 5: The Remote UE evaluates the execution conditions received in Step 3 of this process. If it is determined that any execution condition is met, an RRC connection is established to the handover target associated with the met execution condition.

[0236] Step 6: The Remote UE and the handover target exchange uplink and downlink data.

[0237] Optionally, the execution conditions may include, but are not limited to: the remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal and / or the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate that the Uu link between the first relay terminal and the network-side device is abnormal.

[0238] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0239] Optionally, the first indication information includes:

[0240] Uu link quality related information; and / or

[0241] The handover indication information is sent by the first relay terminal based on the Uu link quality-related information.

[0242] Optionally, when the first relay terminal sends a first indication message to the remote terminal to indicate a Uu link anomaly, the first indication message may include a handover indication message, that is, the first relay terminal directly instructs the remote terminal to perform a link handover through the first indication message.

[0243] Optionally, the switching indication information can be 1-bit indication information;

[0244] Optionally, the handover indication information is sent by the first relay terminal to the remote terminal after determining that the Uu link is abnormal based on Uu link quality-related information;

[0245] Optionally, when the first relay terminal sends a first indication message to the remote terminal to indicate the current Uu link anomaly, the first indication message may include information related to the current Uu link quality. That is, the first relay terminal directly informs the remote terminal of the current Uu link status so that the remote terminal can determine the current Uu link anomaly and perform path switching.

[0246] Optionally, the Uu link quality-related information includes at least one of the following:

[0247] The first relay terminal determines that the quality of the serving cell it is in is below the third threshold;

[0248] The first relay terminal determines that the target cell quality is higher than the fourth threshold;

[0249] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0250] The first relay terminal confirmed that an RRC reconstruction failure had occurred;

[0251] The first relay terminal determines the information of RRC state transition, which includes transitioning from RRC connected state to RRC inactive state, or from RRC connected state to RRC idle state, or from RRC connected state to network coverage out-of-coverage state.

[0252] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal's relay service;

[0253] The first relay terminal determines the information to initiate the PC5 link release process;

[0254] The first relay terminal determines the information about the device malfunction.

[0255] Optionally, when the first relay terminal sends first indication information to the remote terminal to indicate the current Uu link anomaly, the first indication information may include current Uu link quality-related information, that is, the first relay terminal directly informs the remote terminal of the current Uu link status, wherein the Uu link quality-related information may include any one or a combination of the following:

[0256] The first relay terminal determines that the quality of the serving cell it is in is lower than the third threshold. The specific threshold value of the third threshold can be pre-configured by the base station. The quality of the serving cell where the first relay terminal is located is obtained by the first relay terminal based on at least one of RSRP / RSRQ / RSSI / SINR measurements.

[0257] The first relay terminal determines that the target cell quality is higher than the fourth threshold. The specific threshold value of the fourth threshold can be pre-configured by the base station. The target cell quality determined by the first relay terminal is obtained by the first relay terminal based on at least one of RSRP / RSRQ / RSSI / SINR measurements.

[0258] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0259] The first relay terminal determines that a Radio Resource Control (RRC) reconstruction failure has occurred;

[0260] The first relay terminal determines the information of RRC state transition, which includes transitioning from RRC connected state to RRC inactive state, or from RRC connected state to RRC idle state, or from RRC connected state to out-of-coverage (OOC) state.

[0261] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal's relay service;

[0262] The first relay terminal determines the information to initiate the PC5 link release process;

[0263] The first relay terminal determines information about equipment malfunctions; for example, the first relay terminal may be unable to continue providing relay services to the remote terminal due to an abnormal situation, such as the first relay terminal having too low a battery.

[0264] Optionally, the method further includes:

[0265] After the first relay terminal sends the first indication information to the remote terminal, it releases the PC5 link configuration and Uu link configuration that provide relay services to the remote terminal; and / or

[0266] After receiving the response from the remote terminal in response to the first indication, the first relay terminal releases the PC5 link configuration and Uu link configuration that provide relay services to the remote terminal.

[0267] Optionally, the first relay terminal releases the relevant PC5 and Uubackhual link configurations for providing relay services to the remote UE. The specific timing of this configuration release can be any of the following:

[0268] After the first relay terminal sends the first indication information to the Remote UE; and / or

[0269] After the first relay terminal receives the response from the Remote UE to the first instruction information for the first relay terminal.

[0270] Optionally, the method further includes:

[0271] When the first relay terminal is in RRC connection state, the first relay terminal sends a notification message to the network side device. The notification message is used to inform the network side device that the first relay terminal has released the PC5 link configuration and / or Uu link configuration that provides relay services to the remote terminal.

[0272] The notification information includes:

[0273] The unique identifier of the remote terminal; and / or

[0274] The execution conditions satisfied by the remote terminal.

[0275] Optionally, if the first relay terminal is in the RRC connected state, the first relay terminal notifies the base station via notification information that it has released the relevant PC5 and Uu backhual configurations for providing relay services to the Remote UE. The notification information may also include:

[0276] The unique identifier of the Remote UE; and / or

[0277] The handover of this Remote UE satisfies the execution conditions.

[0278] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0279] It should be noted that the path switching method provided in this application embodiment can be executed by a path switching device, or by a control module within the path switching device for executing the path switching method. This application embodiment uses the execution of the path switching method by a path switching device as an example to illustrate the path switching device provided in this application embodiment.

[0280] Figure 6 This is one of the structural schematic diagrams of the path switching device provided in the embodiments of this application, such as... Figure 6As shown, the device includes: a first receiving module 610 and a first switching module 620; wherein:

[0281] The first receiving module 610 is used to receive handover-related information sent by the network-side device. The handover-related information includes: resource configuration of at least one handover target, and at least one set of execution conditions, wherein each handover target corresponds to one set of execution conditions.

[0282] The first switching module 620 is used to switch from the first path to the second path based on the resource configuration of the switching target associated with the satisfied execution conditions when the remote terminal determines that any of the execution conditions are met.

[0283] The first path includes a non-direct connection path through which the remote terminal communicates with the network-side device via the first relay terminal, and the second path includes a direct connection path or a non-direct connection path through which the remote terminal communicates with the switching target.

[0284] The execution conditions include: the remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal and / or the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate that the Uu link between the first relay terminal and the network-side device is abnormal.

[0285] Optionally, the path switching device can receive switching-related information sent by the network-side device through the first receiving module 610, namely, the resource configuration of at least one switching target and at least one set of execution conditions, wherein each switching target corresponds to a set of execution conditions; then, the first switching module 620 can, when the remote terminal determines that any execution conditions are met, switch from the non-directly connected path that the remote terminal communicates with the network-side device through the first relay terminal to the directly connected path or non-directly connected path that the remote terminal communicates with the switching target based on the resource configuration of the switching target associated with the met execution conditions.

[0286] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0287] Optionally, if the first path includes a non-directly connected path and the second path includes a directly connected path, the handover target includes: a first target cell.

[0288] Optionally, if both the first path and the second path include non-directly connected paths, the switching target includes: a second target relay terminal.

[0289] Optionally, the resource configuration of the second target relay terminal includes:

[0290] The resource configuration for establishing a PC5 RRC connection between the remote terminal and the second target relay terminal, and / or the resource configuration for establishing an RRC connection between the remote terminal and the network side through the second target relay terminal.

[0291] Optionally, the resource configuration of at least one second target relay terminal includes the terminal identifier of at least one second target relay terminal;

[0292] The terminal identifier of the at least one second target relay terminal includes any one of the following:

[0293] C-RNTI, I-RNTI, Destination L2 ID, 5G-S-TMSI.

[0294] Optionally, the remote terminal determines the PC5 link anomaly by including at least one of the following:

[0295] The PC5 channel busy rate (CBR) measured by the remote terminal exceeds the first threshold;

[0296] The PC5 channel occupancy rate (CR) measured by the remote terminal exceeds the second threshold;

[0297] The remote terminal determines that a wireless link failure (SL RLF) has occurred;

[0298] The remote terminal initiates the PC5 link release process.

[0299] Optionally, the first indication information includes:

[0300] Uu link quality related information; and / or

[0301] The handover indication information is sent by the first relay terminal based on the Uu link quality-related information.

[0302] Optionally, the Uu link quality-related information includes at least one of the following:

[0303] The first relay terminal determines that the quality of the serving cell it is in is below the third threshold;

[0304] The first relay terminal determines that the target cell quality is higher than the fourth threshold;

[0305] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0306] The first relay terminal determines that a Radio Resource Control (RRC) reconstruction failure has occurred;

[0307] The first relay terminal determines the information of RRC state transition, which includes transitioning from RRC connected state to RRC inactive state, or from RRC connected state to RRC idle state, or from RRC connected state to network coverage out-of-coverage state.

[0308] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal's relay service;

[0309] The first relay terminal determines the information to initiate the PC5 link release process;

[0310] The first relay terminal determines the information about the device malfunction.

[0311] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0312] The path switching device in this application embodiment can be a device or electronic device with an operating system, or it can be a component, integrated circuit, or chip in a terminal. The electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminal 11 listed above, and a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not make specific limitations.

[0313] The path switching device in this application embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this application embodiment does not specifically limit it.

[0314] The path switching device provided in this application embodiment can achieve... Figures 2 to 4 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0315] Figure 7This is a second schematic diagram of the path switching device provided in the embodiments of this application, as shown below. Figure 7 As shown, the device includes: a first transmitting module 710, wherein:

[0316] The first sending module 710 is used to send first indication information to the remote terminal, the first indication information being used to indicate a Uu link abnormality.

[0317] Optionally, the path switching device can send a first indication message to the remote terminal through the first sending module 710. The first indication message is used to indicate that the Uu link is abnormal, so that when the remote terminal determines that the execution conditions are met, based on the switching related information sent by the network-side device, namely the resource configuration of at least one switching target and the resource configuration of the switching target associated with the execution conditions met in at least one set of execution conditions, the remote terminal switches from the non-directly connected path that is connected to the network-side device through the first relay terminal to the directly connected path or non-directly connected path that is connected to the switching target.

[0318] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0319] Optionally, the first indication information includes:

[0320] Uu link quality related information; and / or

[0321] The handover indication information is sent by the first relay terminal based on the Uu link quality-related information.

[0322] Optionally, the Uu link quality-related information includes at least one of the following:

[0323] The first relay terminal determines that the quality of the serving cell it is in is below the third threshold;

[0324] The first relay terminal determines that the target cell quality is higher than the fourth threshold;

[0325] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0326] The first relay terminal confirmed that an RRC reconstruction failure had occurred;

[0327] The first relay terminal determines the information of RRC state transition, which includes transitioning from RRC connected state to RRC inactive state, or from RRC connected state to RRC idle state, or from RRC connected state to network coverage out-of-coverage state.

[0328] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal's relay service;

[0329] The first relay terminal determines the information to initiate the PC5 link release process;

[0330] The first relay terminal determines the information about the device malfunction.

[0331] Optionally, the device further includes:

[0332] The first release module is used to release the PC5 link configuration and Uu link configuration that provide relay services to the remote terminal after sending a first indication message; and / or

[0333] The second release module is used to release the PC5 link configuration and Uu link configuration that provide relay services to the remote terminal after receiving the response information from the remote terminal in response to the first indication information.

[0334] Optionally, the device further includes:

[0335] The second sending module is used to send notification information to the network-side device when the first relay terminal is in RRC connection state. The notification information is used to inform the network-side device that the first relay terminal has released the PC5 link configuration and / or Uu link configuration for providing relay services to the remote terminal.

[0336] The notification information includes:

[0337] The unique identifier of the remote terminal; and / or

[0338] The execution conditions satisfied by the remote terminal.

[0339] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0340] The path switching device in this application embodiment can be a device or electronic device with an operating system, or it can be a component, integrated circuit, or chip in a terminal. The electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminal 11 listed above, and a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not make specific limitations.

[0341] The path switching device provided in this application embodiment can achieve... Figure 5 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0342] Optional, Figure 8 This is a schematic diagram of the structure of the communication device provided in an embodiment of this application. For example... Figure 8 As shown, this application embodiment also provides a communication device 800, including a processor 801, a memory 802, and a program or instructions stored in the memory 802 and executable on the processor 801. For example, when the communication device 800 is a terminal, the program or instructions executed by the processor 801 implement the various processes of the above-described path switching method embodiment and achieve the same technical effect. When the communication device m00 is a network-side device, the program or instructions executed by the processor 801 implement the various processes of the above-described path switching method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0343] Figure 9 This is a schematic diagram of the hardware structure of the remote terminal provided in the embodiments of this application.

[0344] The remote terminal 900 includes, but is not limited to, at least some of the following components: radio frequency unit 901, network module 902, audio output unit 903, input unit 904, sensor 905, display unit 9010, user input unit 907, interface unit 908, memory 909, and processor 910.

[0345] Those skilled in the art will understand that the remote terminal 900 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 910 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 9 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0346] It should be understood that, in this embodiment, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042. The GPU 9041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 906 may include a display panel 9061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0347] In this embodiment, the radio frequency unit 901 receives information from the communication peer and processes it for the processor 910; additionally, it sends the information to be transmitted to the communication peer. Typically, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0348] The memory 909 can be used to store software programs or instructions and various data. The memory 909 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 909 may include high-speed random access memory and non-volatile memory, which may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0349] Processor 910 may include one or more processing units; optionally, processor 910 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 910.

[0350] The processor 910 is used for:

[0351] The remote terminal receives handover-related information sent by the network-side device. The handover-related information includes: resource configuration of at least one handover target, and at least one set of execution conditions, wherein each handover target corresponds to one set of execution conditions.

[0352] If the remote terminal determines that any of the execution conditions are met, the remote terminal switches from the first path to the second path based on the resource configuration of the switching target associated with the met execution conditions;

[0353] The first path includes a non-direct connection path through which the remote terminal communicates with the network-side device via the first relay terminal, and the second path includes a direct connection path or a non-direct connection path through which the remote terminal communicates with the switching target.

[0354] The execution conditions include: the remote terminal determines that the PC5 link between the remote terminal and the first relay terminal is abnormal and / or the remote terminal receives a first indication message sent by the first relay terminal, the first indication message being used to indicate that the Uu link between the first relay terminal and the network-side device is abnormal.

[0355] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0356] Optionally, if the first path includes a non-directly connected path and the second path includes a directly connected path, the handover target includes: a first target cell.

[0357] Optionally, if both the first path and the second path include non-directly connected paths, the switching target includes: a second target relay terminal.

[0358] Optionally, the resource configuration of the second target relay terminal includes:

[0359] The resource configuration for establishing a PC5 RRC connection between the remote terminal and the second target relay terminal, and / or the resource configuration for establishing an RRC connection between the remote terminal and the network side through the second target relay terminal.

[0360] Optionally, the resource configuration of at least one second target relay terminal includes the terminal identifier of at least one second target relay terminal;

[0361] The terminal identifier of the at least one second target relay terminal includes any one of the following:

[0362] C-RNTI, I-RNTI, Destination L2 ID, 5G-S-TMSI.

[0363] Optionally, the remote terminal determines the PC5 link anomaly by including at least one of the following:

[0364] The PC5 channel busy rate (CBR) measured by the remote terminal exceeds the first threshold;

[0365] The PC5 channel occupancy rate (CR) measured by the remote terminal exceeds the second threshold;

[0366] The remote terminal determines that a wireless link failure (SL RLF) has occurred;

[0367] The remote terminal initiates the PC5 link release process.

[0368] Optionally, the first indication information includes:

[0369] Uu link quality related information; and / or

[0370] The handover indication information is sent by the first relay terminal based on the Uu link quality-related information.

[0371] Optionally, the Uu link quality-related information includes at least one of the following:

[0372] The first relay terminal determines that the quality of the serving cell it is in is below the third threshold;

[0373] The first relay terminal determines that the target cell quality is higher than the fourth threshold;

[0374] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0375] The first relay terminal determines that a Radio Resource Control (RRC) reconstruction failure has occurred;

[0376] The first relay terminal determines the information of RRC state transition, which includes transitioning from RRC connected state to RRC inactive state, or from RRC connected state to RRC idle state, or from RRC connected state to network coverage out-of-coverage state.

[0377] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal's relay service;

[0378] The first relay terminal determines the information to initiate the PC5 link release process;

[0379] The first relay terminal determines the information about the device malfunction.

[0380] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0381] The remote terminal embodiment in this application is a product embodiment corresponding to the above method embodiment. All implementation methods in the above method embodiment are applicable to this remote terminal embodiment and can achieve the same or similar technical effects, so they will not be described again here.

[0382] Figure 10 This is a schematic diagram of the hardware structure of the first relay terminal provided in the embodiments of this application.

[0383] The first relay terminal 1000 includes, but is not limited to, at least some of the following components: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 10010, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0384] Those skilled in the art will understand that the first relay terminal 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 10 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0385] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The GPU 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0386] In this embodiment, the radio frequency unit 1001 receives information from the communication peer and processes it for the processor 1010; additionally, it sends information to be transmitted to the communication peer. Typically, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0387] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include high-speed random access memory and non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0388] Processor 1010 may include one or more processing units; optionally, processor 1010 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1010.

[0389] The processor 1010 is used for:

[0390] The first relay terminal sends a first indication message to the remote terminal, the first indication message being used to indicate a Uu link anomaly.

[0391] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0392] Optionally, the first indication information includes:

[0393] Uu link quality related information; and / or

[0394] The handover indication information is sent by the first relay terminal based on the Uu link quality-related information.

[0395] Optionally, the Uu link quality-related information includes at least one of the following:

[0396] The first relay terminal determines that the quality of the serving cell it is in is below the third threshold;

[0397] The first relay terminal determines that the target cell quality is higher than the fourth threshold;

[0398] The first relay terminal determines that a wireless link failure (Uu RLF) has occurred;

[0399] The first relay terminal confirmed that an RRC reconstruction failure had occurred;

[0400] The first relay terminal determines the information of RRC state transition, which includes transitioning from RRC connected state to RRC inactive state, or from RRC connected state to RRC idle state, or from RRC connected state to network coverage out-of-coverage state.

[0401] The first relay terminal determines that it cannot meet the Quality of Service (QoS) requirements of the remote terminal's relay service;

[0402] The first relay terminal determines the information to initiate the PC5 link release process;

[0403] The first relay terminal determines the information about the device malfunction.

[0404] Optionally, the processor 1010 is also used for:

[0405] After the first relay terminal sends the first indication information to the remote terminal, it releases the PC5 link configuration and Uu link configuration that provide relay services to the remote terminal; and / or

[0406] After receiving the response from the remote terminal in response to the first indication, the first relay terminal releases the PC5 link configuration and Uu link configuration that provide relay services to the remote terminal.

[0407] Optionally, the processor 1010 is also used for:

[0408] When the first relay terminal is in RRC connection state, the first relay terminal sends a notification message to the network side device. The notification message is used to inform the network side device that the first relay terminal has released the PC5 link configuration and / or Uu link configuration that provides relay services to the remote terminal.

[0409] The notification information includes:

[0410] The unique identifier of the remote terminal; and / or

[0411] The execution conditions satisfied by the remote terminal.

[0412] In this embodiment, the abnormality of the PC5 link between the remote terminal and the first relay terminal and / or the abnormality of the Uu link between the first relay terminal and the network-side device are determined by the remote terminal. That is, the path switching is determined by judging whether the PC5 and / or Uu air interface meet the conditions. This fully adapts to the Sidelink relay scenario and autonomously triggers the path switching from a non-directly connected path to a directly connected path or a non-directly connected path, thereby improving the switching robustness in the Sidelink relay scenario.

[0413] The first relay terminal embodiment in this application is a product embodiment corresponding to the above method embodiment. All implementation methods in the above method embodiment are applicable to the first relay terminal embodiment and can achieve the same or similar technical effects, so they will not be described again here.

[0414] Figure 11 This is a schematic diagram of the hardware structure of the network-side device provided in the embodiments of this application.

[0415] like Figure 11As shown, the network-side device 1100 includes: an antenna 1101, a radio frequency (RF) device 1102, and a baseband device 1103. The antenna 1101 is connected to the RF device 1102. In the uplink direction, the RF device 1102 receives information through the antenna 1101 and transmits the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes the information to be transmitted and sends it to the RF device 1102. The RF device 1102 processes the received information and transmits it through the antenna 1101.

[0416] The aforementioned frequency band processing device can be located in the baseband device 1103. The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1103, which includes a processor 1104 and a memory 1105.

[0417] The baseband device 1103 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 11 As shown, one of the chips, for example, is a processor 1104, which is connected to a memory 1105 to call the program in the memory 1105 and execute the network device operation shown in the above method embodiment.

[0418] The baseband device 1103 may also include a network interface 1106 for exchanging information with the radio frequency device 1102, such as a common public radio interface (CPRI).

[0419] Specifically, the network-side device in this application embodiment further includes: instructions or programs stored in memory 1105 and executable on processor 1104. Processor 1104 calls the instructions or programs in memory 1105 to execute the relevant steps in the above method embodiments and achieve the same technical effect. To avoid repetition, they will not be described in detail here.

[0420] The network-side device embodiment in this application is a product embodiment corresponding to the above method embodiment. All implementation methods in the above method embodiment are applicable to this network-side device embodiment and can achieve the same or similar technical effects, so they will not be described again here.

[0421] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described path switching method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0422] The processor mentioned above 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 disk, or optical disk.

[0423] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described path switching method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0424] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0425] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of additional elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order, for example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0426] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0427] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A path switching method characterized by, The method comprises: A remote terminal receives switching-related information sent by a network-side device, the switching-related information comprising: resource configuration of at least one switching target, and at least one set of execution conditions, wherein each switching target corresponds to a set of execution conditions; In a case where the remote terminal determines that any execution condition is met, the remote terminal applies the resource configuration of the switching target based on the resource configuration of the switching target associated with the met execution condition, and switches from a first path to a second path; The first path comprises a non-direct connection path through which the remote terminal is communicatively connected to the network-side device via a first relay terminal, and the second path comprises a direct connection path or a non-direct connection path through which the remote terminal is communicatively connected to the switching target; The execution conditions comprise: the remote terminal receiving first indication information sent by the first relay terminal, the first indication information being used to indicate that a Uu link between the first relay terminal and the network-side device is abnormal, and the first indication information comprising at least one of the following: Information about the first relay terminal determining RRC state conversion, the RRC state conversion comprising: entering an RRC inactive state from an RRC connected state, entering an RRC idle state from the RRC connected state, or entering a network coverage-out state from the RRC connected state; Information about the first relay terminal determining that a quality of service (QoS) of a relay service of the remote terminal cannot be met; Information about the first relay terminal determining device abnormality.

2. The path switching method according to claim 1, characterized by, In a case where the first path comprises a non-direct connection path and the second path comprises a direct connection path, the switching target comprises: a first target cell.

3. The path switching method according to claim 1, characterized by, In a case where the first path comprises a non-direct connection path and the second path comprises a non-direct connection path, the switching target comprises: a second target relay terminal.

4. The path switching method according to claim 3, characterized by, The resource configuration of the second target relay terminal comprises: Resource configuration for the remote terminal and the second target relay terminal to establish a PC5 RRC connection, and / or resource configuration for the remote terminal to establish an RRC connection with the network side via the second target relay terminal.

5. The path switching method according to claim 3, characterized by, The resource configuration of at least one second target relay terminal comprises a terminal identifier of the at least one second target relay terminal. The terminal identifier of the at least one second target relay terminal comprises any of the following: A cell radio network temporary identifier (C-RNTI), an inactive state radio network temporary identifier (I-RNTI), a destination layer 2 identifier (Destination L2 ID), and a 5G system temporary mobile user identity (5G-S-TMSI).

6. A path switching method characterized by comprising: The method comprises: A first relay terminal sends first indication information to a remote terminal, the first indication information being used to indicate Uu link abnormality, and the first indication information comprising at least one of the following: Information about the first relay terminal determining RRC state conversion, the RRC state conversion comprising: entering an RRC inactive state from an RRC connected state, entering an RRC idle state from the RRC connected state, or entering a network coverage-out state from the RRC connected state; Information about the first relay terminal determining that a quality of service (QoS) of a relay service of the remote terminal cannot be met; Information about the first relay terminal determining device abnormality.

7. The path switching method according to claim 6, wherein The method further comprises: The first relay terminal releases the PC5 link configuration and the Uu link configuration for providing relay service for the remote terminal after sending the first indication information to the remote terminal; and / or The first relay terminal releases the PC5 link configuration and the Uu link configuration for providing relay service for the remote terminal after receiving the response information of the remote terminal to the first indication information.

8. The path switching method according to claim 6, characterized by, The method further comprises: In a case where the first relay terminal is in an RRC connected state, the first relay terminal sends informing information to a network side device, the informing information being used to inform the network side device that the first relay terminal has released the PC5 link configuration and / or the Uu link configuration for providing relay service for the remote terminal; The informing information comprises: A unique identifier of the remote terminal; and / or An execution condition met by the remote terminal.

9. A path switching apparatus characterized by comprising: Comprise: A first receiving module, configured to receive switching related information sent by a network side device, the switching related information comprising: resource configuration of at least one switching target, and at least one set of execution conditions, wherein each switching target corresponds to one set of execution conditions; A first switching module, configured to, in a case where the remote terminal determines that any of the execution conditions is met, the remote terminal applies resource configuration of a switching target associated with the met execution condition based on the resource configuration, and switches from a first path to a second path; The first path comprises a non-direct connection path through which the remote terminal is communicatively connected to the network side device via the first relay terminal, and the second path comprises a direct connection path or a non-direct connection path through which the remote terminal is communicatively connected to the switching target; The execution condition comprises: the remote terminal receives first indication information sent by the first relay terminal, the first indication information being used to indicate that the Uu link between the first relay terminal and the network side device is abnormal, and the first indication information comprises at least one of the following: Information that the first relay terminal determines RRC state transition, the RRC state transition comprising entering RRC inactive state from RRC connected state, or entering RRC idle state from RRC connected state, or entering network coverage outside state from RRC connected state; Information that the first relay terminal determines that the quality of service (QoS) of the remote terminal relay service cannot be met; Information that the first relay terminal determines device abnormality.

10. The path switching device according to claim 9, wherein In a case where the first path comprises a non-direct connection path and the second path comprises a direct connection path, the switching target comprises: a first target cell.

11. The path switching device according to claim 9, wherein In a case where the first path comprises a non-direct connection path and the second path comprises a non-direct connection path, the switching target comprises: a second target relay terminal.

12. The path switching device according to claim 11, wherein The resource configuration of the second target relay terminal comprises: Resource configuration for the remote terminal and the second target relay terminal to establish PC5 RRC connection, and / or resource configuration for the remote terminal to establish RRC connection with the network side via the second target relay terminal.

13. The path switching device according to claim 11, wherein The resource configuration of at least one second target relay terminal comprises terminal identifier of the at least one second target relay terminal; The terminal identifier of the at least one second target relay terminal comprises any of the following: C-RNTI, I-RNTI, Destination L2 ID, 5G-S-TMSI.

14. A path switching apparatus characterized by comprising: comprising: The first sending module is configured to send first indication information to the remote terminal, the first indication information being used to indicate a Uu link exception, and the first indication information comprising at least one of the following: The first relay terminal determines information of RRC state conversion, the RRC state conversion comprising entering an RRC inactive state from an RRC connected state, or entering an RRC idle state from the RRC connected state, or entering a network out-of-coverage state from the RRC connected state; The first relay terminal determines information that a quality of service (QoS) of a relay service for the remote terminal cannot be met; The first relay terminal determines information of device exception.

15. The path switching device according to claim 14, wherein The apparatus further comprises: The first releasing module is configured to release PC5 link configuration and Uu link configuration for providing the relay service for the remote terminal after the first indication information is sent to the remote terminal; and / or The second releasing module is configured to release the PC5 link configuration and the Uu link configuration for providing the relay service for the remote terminal after receiving response information of the remote terminal to the first indication information.

16. The path switching device according to claim 14, wherein The apparatus further comprises: The second sending module is configured to send notification information to a network side device when the first relay terminal is in an RRC connected state, the notification information being used to notify the network side device that the first relay terminal has released the PC5 link configuration and / or the Uu link configuration for providing the relay service for the remote terminal. The notification information comprises: A unique identifier of the remote terminal; and / or An execution condition met by the remote terminal.

17. A remote terminal, characterized by The apparatus comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the path switching method according to any one of claims 1 to 5.

18. A first relay terminal, comprising: The apparatus comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the path switching method according to any one of claims 6 to 8.

19. A readable storage medium, characterized by, The readable storage medium stores a program or instructions, and the program or instructions are executed by the processor to implement the steps of the path switching method according to any one of claims 1 to 5, or implement the steps of the path switching method according to any one of claims 6 to 8.

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