CN115087067A

CN115087067A - Path switching method, device, terminal and storage medium

Info

Publication number: CN115087067A
Application number: CN202110272587.1A
Authority: CN
Inventors: 郑倩; 刘进华
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2022-09-20
Also published as: WO2022188855A1

Abstract

The application discloses a path switching method, a path switching device, a terminal and a storage medium, and belongs to the technical field of communication. The method comprises the following steps: the far-end terminal receives switching related information sent by the network side equipment, wherein the switching related information comprises: resource allocation 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; under the condition that any execution condition is determined to be 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 condition; the first path comprises a non-direct connection path, and the second path comprises a direct connection path or a non-direct connection path; the execution conditions include: the remote terminal determines a PC5 link anomaly and/or a Uu link anomaly. According to the embodiment of the application, whether the path switching is carried out or not is determined by judging whether the PC5 and/or the Uu air interface meet the conditions, and the switching robustness under the Silelink relay scene is improved.

Description

Path switching method, device, terminal and storage medium

Technical Field

The present application belongs to the field of communication technologies, and in particular, to a path switching method, apparatus, terminal, and storage medium.

Background

In Relay (Relay) technology in a wireless communication system, one or more Relay nodes are added between a base station and a terminal and are responsible for forwarding wireless signals one or more times, that is, the wireless signals can reach a remote terminal through multiple hops (hops).

The base station sends a Radio Resource Control (RRC) reconfiguration message (handover command) to ensure that the handover is completed only when the quality of the air interface Radio link is good. In order to improve the switching performance, the closest of the prior art schemes is a Conditional Handover (CHO) scheme, but the CHO scheme cannot be directly reused in a Sidelink relay scene.

Disclosure of Invention

An object of the embodiments of the present application is to provide a method, an apparatus, a terminal, and a storage medium for path switching, which can determine an appropriate path switching condition based on characteristics of a Sidelink relay scene.

In a first aspect, a method for switching paths is provided, where the method includes:

the method comprises the following steps that a far-end terminal receives switching related information sent by network side equipment, wherein the switching related information comprises: resource allocation 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;

under the condition that the far-end terminal determines that any execution condition is met, the far-end terminal switches from a first path to a second path based on the resource configuration of a switching target associated with the met execution condition;

the first path comprises a non-direct connection path of the remote terminal in communication connection with the network side equipment through the first relay terminal, and the second path comprises a direct connection path or a non-direct connection path of the remote terminal in communication connection with the switching target;

the execution conditions include: the remote terminal determines that a PC5 link between the remote terminal and the first relay terminal is abnormal and/or the remote terminal receives first indication information sent by the first relay terminal, wherein the first indication information is used for indicating that a Uu link between the first relay terminal and the network side equipment is abnormal.

In a second aspect, a method for switching paths is provided, the method including:

the first relay terminal sends first indication information to the remote terminal, wherein the first indication information is used for indicating that the Uu link is abnormal.

In a third aspect, a path switching apparatus is provided, the apparatus including:

a first receiving module, configured to receive handover-related information sent by a network side device, where the handover-related information includes: the resource allocation 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, when the remote terminal determines that any of the execution conditions is satisfied, switch, by the remote terminal, from the first path to the second path based on a resource configuration of a switching target associated with the satisfied execution condition;

In a fourth aspect, there is provided a path switching apparatus, comprising:

the first sending module is configured to send first indication information to a remote terminal, where the first indication information is used to indicate that a Uu link is abnormal.

In a fifth aspect, there is provided a remote terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect.

In a sixth aspect, there is provided a relay terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the method according to the second aspect.

In a seventh aspect, there is provided a readable storage medium on which a program or instructions are stored, which program or instructions, when executed by a processor, implement the steps of the method according to the first aspect or implement the steps of the method according to the second aspect.

In an eighth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the steps of the method according to the first aspect or to implement the steps of the method according to the second aspect.

In the embodiment of the application, the remote terminal determines that a PC5 link between the remote terminal and the first relay terminal is abnormal and/or a Uu link between the first relay terminal and the network side device is abnormal, that is, determines whether to perform path switching by judging whether a PC5 and/or a Uu air interface meet a condition, sufficiently adapts to a Sidelink relay scene, autonomously triggers path switching from a non-direct-connected path to a direct-connected path or a non-direct-connected path, and improves switching robustness in the Sidelink relay scene.

Drawings

FIG. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a schematic flowchart of a path switching method according to an embodiment of the present disclosure;

fig. 3 is a scene schematic diagram of a UE-to-Network Relay mechanism provided in the embodiment of the present application;

fig. 4 is a schematic flowchart of a remote terminal being handed over to a directly connected Uu cell according to an embodiment of the present application;

fig. 5 is a second flowchart of a path switching method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a path switching apparatus according to an embodiment of the present disclosure;

fig. 7 is a second schematic structural diagram of a path switching apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

fig. 9 is a schematic hardware structure diagram of a remote terminal according to an embodiment of the present application;

fig. 10 is a schematic hardware structure diagram of a first relay terminal according to an embodiment of the present application.

Fig. 11 is a schematic hardware structure diagram of a network-side device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used are interchangeable under appropriate circumstances such that embodiments of the application can be practiced in sequences other than those illustrated or described herein, and the terms "first" and "second" used herein generally do not denote any order, nor do they denote any order, for example, the first object may be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may 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 the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, but the techniques may also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems, such as Long Term Evolution (LTE) communication systems.

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.

The following describes in detail a path switching method and apparatus provided in the embodiments of the present application with reference to the accompanying drawings.

Fig. 2 is a schematic flow chart of a path switching method provided in an embodiment of the present application, and as shown in fig. 2, the method includes the following steps:

step 200, a remote terminal receives handover related information sent by a network side device, where the handover related information includes: resource allocation 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;

step 210, in a case that the remote terminal determines that any of the execution conditions is satisfied, the remote terminal switches from a first path to a second path based on a resource configuration of a switching target associated with the satisfied execution condition;

the first path comprises a non-direct connection path of the far-end terminal in communication connection with the network side equipment through the first relay terminal, and the second path comprises a direct connection path or a non-direct connection path of the far-end terminal in communication connection with the switching target;

Optionally, the wireless relay technology may be used to not only extend cell coverage and make up for cell coverage blind spots, but also improve cell capacity through spatial resource reuse. For indoor coverage, the Relay technology can also play a role in overcoming penetration loss and improving indoor coverage quality.

Taking a simpler two-hop relay as an example, the wireless relay divides a base station-terminal link into two links, namely a base station-relay station and a relay station-terminal, so that there is an opportunity to replace a link with poor quality with two links with better quality to obtain higher link capacity and better coverage.

At present, a Relay terminal Relay supported in a communication system is a UE-to-Network Relay, that is, one end of the Relay is connected to the UE, and the other end is connected to a Network side. The UE connected to the Relay is called a remote UE (remote UE).

Optionally, in embodiments of the present application, the non-direct connection path in the first path refers to that the remote terminal establishes Radio Resource Control (RRC) connection with the network side through the first relay terminal, and forwards a communication link of uplink and downlink data.

Optionally, in embodiments of the present application, the direct connection path in the second path refers to a communication link through which the remote terminal establishes an RRC connection with the network side through the handover target (the first target cell) and directly receives and transmits uplink and downlink data.

Optionally, in embodiments of the present application, the non-direct connection path in the second path refers to a communication link where the remote terminal establishes an RRC connection with the network side through the second target relay terminal and forwards uplink and downlink data.

Fig. 3 is a scene schematic diagram of a UE-to-Network Relay mechanism provided in the embodiment of the present application, and as shown in fig. 3, the scene is a UE-to-Network scenario, where a Remote terminal Remote UE needs to transmit data with a Network side, but because coverage is poor, a Relay terminal Relay UE is found as a Relay, where a Uu interface is between the Relay UE and a base station, and a sidelink (PC5) interface is between the Relay UE and the Remote UE. In general, Relay UEs are open and can serve any Remote UE.

Fig. 4 is a schematic flowchart of a procedure for switching a remote terminal to a directly connected Uu cell according to an embodiment of the present application, and as shown in fig. 4, the method includes the following steps:

step 0: and the Remote UE establishes RRC connection with the base station through the Relay UE and receives and transmits uplink and downlink data.

Step 1: and the Remote UE reports the measurement result to the base station.

Step 2: the base station decides to switch the Remote UE to a certain cell.

And step 3: and the base station sends an RRC reconfiguration message (switching command) to the Remote UE, and the RRC reconfiguration message (switching command) is forwarded through the Relay UE.

And 4, step 4: and the Remote UE initiates random access to the target Cell and establishes RRC connection.

And 5: and the Remote UE sends an RRC reconfiguration completion message (switching completion) to the target cell.

Step 6: the base station sends RRC reconfiguration information to the Relay UE, the Relay UE releases related PC5 and Uu backhaul configuration for providing Relay service for the Relay UE, and the Relay UE sends RRC reconfiguration completion information to the base station.

And 7: optionally, the Relay UE releases the PC5 RRC connection with the Remote UE.

And 8: and the Remote UE directly receives and transmits uplink and downlink data with the target cell.

In the foregoing step 3, the base station sends the RRC reconfiguration message (handover command) only when the quality of the air interface radio link is good, so as to ensure that the handover is completed. In order to improve the switching performance, the closest of the prior art schemes is a Conditional Handover (CHO) scheme, but the CHO scheme cannot be directly reused in the sildelink relay scene.

Based on this, in the embodiments of the present application, characteristics of the Sidelink relay scene are considered, and a PC5 link abnormality between the first relay terminals and/or a Uu link abnormality between the first relay terminals and the network side device is determined, so as to perform path switching.

Optionally, the remote terminal may first receive handover related information sent by the network side device, where the handover related information includes: the resource allocation of at least one switching target and at least one set of execution conditions, wherein each switching target can correspond to the same or different set of execution conditions; that is, the remote terminal switches to the communication connection with a certain handover destination only when the execution condition corresponding to the handover destination is satisfied.

Alternatively, there may be only one execution condition corresponding to each handover target, or multiple execution conditions may be simultaneously corresponding to each handover target.

Optionally, in a case that the switching target corresponds to multiple execution conditions, and any one of the execution conditions is satisfied, the path switching is performed.

Optionally, when the switching target corresponds to multiple execution conditions, and any two or more execution conditions are satisfied, performing path switching; the embodiments of the present application are not limited in this regard.

Optionally, in a case that the remote terminal determines that any execution condition is satisfied, the remote terminal may switch from the first path to the second path based on the resource configuration of the handover target corresponding to the satisfied execution condition, and communicate with the handover target;

taking the case that the remote terminal switches from index path to direct path when any execution condition is satisfied, the path switching includes the following steps:

step 0: the Remote terminal Remote UE establishes RRC connection with network side equipment such as a base station through a first Relay terminal Relay UE and receives and transmits uplink and downlink data; currently, the path is a non-direct path index path;

step 1: the Remote terminal Remote UE reports the measurement result to the base station;

step 2: the base station decides to switch the Remote UE to a certain switching target; namely switching to a direct path;

and 3, step 3: the base station sends an RRC reconfiguration message (i.e. a handover command, which may also be referred to as handover related information) to the Remote UE, where the RRC reconfiguration message (handover command) is forwarded by the first Relay terminal Relay UE.

Wherein the RRC reconfiguration message carries:

resource allocation of at least one switching target, wherein different switching targets are distinguished by respective unique identifiers;

and, at least one set of execution conditions;

wherein, each switching target can correspond to a set of execution conditions; the execution condition is an execution condition for applying resource allocation of a corresponding handover target.

Wherein the execution conditions include, but are not limited to:

the remote terminal determines that a PC5 link between the remote terminal and the first relay terminal is abnormal;

and/or the remote terminal receives first indication information sent by the first relay terminal, wherein the first indication information is used for indicating that a Uu link between the first relay terminal and the network side equipment is abnormal.

And 4, step 4: the Remote UE sends an RRC reconfiguration complete message (handover complete) to the base station. The RRC reconfiguration message (handover command) may be forwarded by the first relay terminal.

And 5: and (3) the Remote UE evaluates the execution conditions received in step (3) of the process, and if any execution condition is determined to be met, initiates random access to a handover target associated with the met execution condition and establishes RRC connection.

Step 6: and the Remote UE receives and transmits uplink and downlink data with a switching target.

Taking the case that the remote terminal switches from index path to index path when any execution condition is satisfied, the path switching includes the following steps:

step 2: the base station decides to switch the Remote UE to a certain switching target; namely, switching to another indirect path;

and step 3: the base station sends an RRC reconfiguration message (i.e. a handover command, which may also be referred to as handover related information) to the Remote UE, where the RRC reconfiguration message (handover command) is forwarded by the first Relay terminal Relay UE.

Wherein the RRC reconfiguration message carries:

and, at least one set of execution conditions;

Wherein the execution conditions include, but are not limited to:

And 5: the Remote UE evaluates the execution conditions received in step 3 of the current process, and if it is determined that any one of the execution conditions is satisfied, establishes an RRC connection to a handover target associated with the satisfied execution condition.

Alternatively, the execution conditions may include, but are not limited to: the remote terminal determines that a PC5 link between the remote terminal and the first relay terminal is abnormal and/or the remote terminal receives first indication information sent by the first relay terminal, wherein the first indication information is used for indicating that a Uu link between the first relay terminal and the network side equipment is abnormal.

Optionally, in a case that the first path includes a non-direct connection path and the second path includes a direct connection path, the handover target includes: a first target cell.

Optionally, if the first path includes a non-direct path and the second path includes a direct path, that is, the remote terminal is switched from the non-direct path index path to the direct path of the direct path, the at least one handover target includes at least one first target cell; wherein the different first target cells are identified by cell identity.

Optionally, if the remote terminal meets a set of execution conditions corresponding to the first target cell, the path switching may be switched from index path to direct path, where the path switching includes the following steps:

step 2: the base station decides to switch the Remote UE to a certain target cell; namely switching to a direct path;

Wherein the RRC reconfiguration message carries:

and, at least one set of execution conditions;

wherein each of the switching targets may correspond to a set of execution conditions; the execution condition is an execution condition for applying resource allocation of a corresponding handover target.

Wherein the execution conditions include, but are not limited to:

And 5: and the Remote UE evaluates the execution conditions received in the step 3 of the current process, and initiates random access to the first target cell and establishes RRC connection if the execution conditions corresponding to the first target cell are determined to be met.

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

Optionally, in a case that the first path includes a non-direct connection path and the second path includes a non-direct connection path, the handover target includes: and a second target relay terminal.

Optionally, if the first path includes a non-direct connection path and the second path includes a non-direct connection path, that is, the remote terminal is switched from the non-direct connection path index path to the non-direct connection path index path, the at least one switching target includes at least one second target relay terminal; and the different second target relay terminals are identified through the terminal identifiers of the second target relay terminals.

Optionally, if the remote terminal satisfies a set of execution conditions corresponding to the second target relay terminal, the path switching may be switched from the index path to the index path, where the path switching includes the following steps:

step 2: the base station decides to switch the Remote UE to a certain target relay terminal; namely, switching to the indirect path;

Wherein the RRC reconfiguration message carries:

resource allocation of at least one second target relay terminal, wherein different second target relay terminals are distinguished through respective terminal identifications;

and, at least one set of execution conditions;

each second target relay terminal may correspond to a set of execution conditions; the execution condition is an execution condition for applying the resource configuration of the corresponding second target relay terminal.

Wherein the execution conditions include, but are not limited to:

And 5: the Remote UE evaluates the execution conditions received in step 3 of this process, determines that the execution conditions corresponding to the second target relay terminal are met, 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.

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

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

the remote terminal and the second target relay terminal establish resource configuration of a PC5 RRC connection, and/or the remote terminal establishes resource configuration of an RRC connection with a network side through the second target relay terminal.

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 needs to determine the resource configuration of the PC5 RRC connection established between the remote terminal and the second target relay terminal;

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

accordingly, the resource configuration of the second target relay terminal may include, but is not limited to:

the remote terminal and the second target relay terminal establish resource configuration of a PC5 RRC connection, and the remote terminal establishes resource configuration of an RRC connection with a network side through the second target relay terminal.

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

and the remote terminal and the second target relay terminal establish resource configuration of PC5 RRC connection.

and the remote terminal establishes the resource configuration of RRC connection with the network side through the second target relay terminal.

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

the terminal identifier of the at least one second target relay terminal includes any one of:

cell-radio network Temporary identifier (C-RNTI), Inactive-radio network Temporary identifier (I-RNTI), Destination layer 2 identifier (Destination L2 ID), and 5G system Temporary Mobile Subscriber Identity (5G-S-radio Mobile Subscriber Identity, 5G-S-TMSI).

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

the communication system in the embodiment of the present application describes a 5G system for exemplary purposes, but may also be applied to applications other than 5G system applications, such as a 6th Generation (6G) communication system, for example, a Long Term Evolution (LTE) communication system. This embodiment is not limited to this.

Optionally, in order to effectively distinguish at least one second target relay terminal, the resource configuration of the second target relay terminal may include a terminal identifier of the second target relay terminal;

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.

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

optionally, in order to effectively distinguish at least one first target cell, the cell identifier of the first target cell may be included in the resource configuration of the first target cell;

optionally, the cell identity of the first target cell may also be associated with a set of execution conditions associated with the first target cell.

Optionally, the remote terminal determining the PC5 link abnormality includes at least one of:

the PC5 channel busy rate CBR measured by the remote terminal exceeds a first threshold;

the PC5 channel occupancy CR measured by the remote terminal exceeds a second threshold;

the remote terminal determines that the radio link failure SL RLF occurs;

the remote terminal initiates the PC5 link release flow.

Optionally, the remote terminal may determine that the PC5 link is abnormal based on a measured PC5 channel busy rate CBR exceeding a first threshold, wherein the measured PC5 channel busy rate CBR measurement of the remote terminal is determined for at least one of SL discovery and communication pool;

optionally, the remote terminal may determine a PC5 link anomaly based on the measured PC5 channel occupancy CR exceeding a second threshold exceeding a first threshold, wherein the measured PC5 channel occupancy CR measurement of the remote terminal is determined for at least one of SL discovery and communication pool;

alternatively, the remote terminal may determine that the link failure SL RLF occurs based on the determination of the remote terminal, and determine that the link abnormality of the PC5 is caused, that is, the radio link failure RLF occurs on the sidelink between the remote terminal and the first relay terminal;

optionally, the remote terminal may determine that the PC5 link is abnormal based on the operation of initiating the PC5 link release flow;

alternatively, the remote terminal may determine that the PC5 link is abnormal based on any one or any combination of the following:

the Channel Busy Rate (CBR) of the PC5 measured by the remote terminal exceeds a first threshold;

the PC5 channel occupancy rate (CR) measured by the remote terminal exceeds a second threshold;

a remote terminal determines that a sidelink radio link failure (SL RLF) occurs;

the remote terminal initiates the PC5 link release flow.

Optionally, the first indication information includes:

uu link quality related information; and/or

And switching indication information, wherein the switching indication information is sent by the first relay terminal based on the Uu link quality related information.

Optionally, when the remote terminal receives first indication information used by the first relay terminal to indicate that the Uu link is abnormal, the first indication information may include handover indication information, that is, the first relay terminal directly indicates the remote terminal to perform link handover through the first indication information;

optionally, the handover indication information may be 1-bit indication information;

optionally, the handover indication information is sent to the remote terminal after the first relay terminal determines that the Uu link is abnormal based on the Uu link quality related information;

optionally, when the remote terminal receives first indication information that is used by the first relay terminal to indicate that the current Uu link is abnormal, the first indication information may include information related to the current Uu link quality, that is, the first relay terminal directly informs the remote terminal of the current link condition of the Uu, so that the remote terminal may determine that the current Uu link is abnormal and perform path switching.

Optionally, the Uu link quality related information includes at least one of:

the first relay terminal determines that the quality of the serving cell is lower than the third threshold;

the first relay terminal determines the information that the quality of the target cell is higher than a fourth threshold;

the first relay terminal determines the information of occurrence of radio link failure Uu RLF;

the first relay terminal determines the information of the occurrence of Radio Resource Control (RRC) reconstruction failure;

the first relay terminal determines information of RRC state transition, wherein the RRC state transition comprises entering an RRC non-activated state from an RRC connected state, or entering an RRC idle state from the RRC connected state, or entering an out-of-network-coverage state from the RRC connected state;

the first relay terminal determines the information which can not meet the QoS of the relay service of the remote terminal;

the first relay terminal determines information for initiating a PC5 link release process;

the first relay terminal determines information of the device abnormality.

Optionally, when the remote terminal receives first indication information that is used by the first relay terminal to indicate that the current Uu link is abnormal, the first indication information may include current Uu link quality related information, that is, the first relay terminal directly informs the remote terminal of a current link condition of the Uu, where the Uu link quality related information may include any one of or a combination of the following:

the first relay terminal determines information that the Quality of a serving cell where the first relay terminal is located is lower than a third threshold, a specific threshold of the third threshold may be configured in advance by a base station, and the Quality of the serving cell where the first relay terminal is located is obtained by at least one measurement of Reference Signal Receiving Power (Reference Signal Receiving Power, RSRP)/Reference Signal Receiving Quality (Reference Signal Receiving Quality, RSRQ)/Received Signal Strength Indicator (RSSI)/Signal to Interference plus Noise Ratio (SINR);

the first relay terminal determines information that the quality of the target cell is higher than a fourth threshold, a specific threshold value of the fourth threshold can be configured in advance by the base station, and the quality of the target cell determined by the first relay terminal is obtained by at least one measurement of the first relay terminal based on RSRP/RSRQ/RSSI/SINR;

the first relay terminal determines information of RRC state transition, wherein the RRC state transition comprises entering an RRC non-activated state from an RRC connected state, or entering an RRC idle state from the RRC connected state, or entering an out-of-coverage (OOC) state from the RRC connected state;

the first relay terminal determines information which cannot meet the Quality of Service (QoS) of the relay Service of the remote terminal;

the first relay terminal determines information for initiating a link release process of the PC 5;

the first relay terminal determines the abnormal information of the equipment; for example, when the first relay terminal is abnormal, the relay service cannot be provided for the remote terminal, and the abnormal condition may include that the power of the first relay terminal is too low.

Fig. 5 is a second schematic flowchart of a path switching method according to an embodiment of the present application, and as shown in fig. 5, the method includes the following steps:

step 500, the first relay terminal sends first indication information to the remote terminal, where the first indication information is used to indicate that the Uu link is abnormal.

Optionally, when the Uu link is abnormal, the first relay terminal sends first indication information to the remote terminal, indicating that the Uu link is abnormal, so that the remote terminal performs path switching.

In the embodiments of the present application, characteristics of a Sidelink relay scene are considered, and a PC5 link between first relay terminals and/or a Uu link between the first relay terminals and a network side device are determined to perform path switching.

Optionally, when the handover target corresponds to multiple execution conditions, and any one of the execution conditions is satisfied, the path handover is performed.

Wherein the RRC reconfiguration message carries:

and, at least one set of execution conditions;

Wherein the execution conditions include, but are not limited to:

And 5: the Remote UE evaluates the execution conditions received in step 3 of the current process, and if it is determined that any one of the execution conditions is satisfied, initiates random access to a handover target associated with the satisfied execution condition and establishes RRC connection.

Wherein the RRC reconfiguration message carries:

and, at least one set of execution conditions;

Wherein the execution conditions include, but are not limited to:

Optionally, the first indication information includes:

uu link quality related information; and/or

Optionally, when the first relay terminal sends first indication information for indicating that the Uu link is abnormal to the remote terminal, the first indication information may include handover indication information, that is, the first relay terminal directly indicates the remote terminal to perform link handover through the first indication information;

optionally, when the first relay terminal sends the first indication information for indicating that the current Uu link is abnormal to the remote terminal, the first indication information may include information related to the current Uu link quality, that is, the first relay terminal directly informs the remote terminal of the current link condition of the Uu, so that the remote terminal may determine that the current Uu link is abnormal and perform path switching.

Optionally, the Uu link quality related information includes at least one of:

the first relay terminal determines that RRC reestablishment failure occurs;

the first relay terminal determines information of the device abnormality.

Optionally, when the first relay terminal sends the first indication information for indicating that the current Uu link is abnormal to the remote terminal, 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 condition, where the Uu link quality related information may include any one or a combination of the following:

the first relay terminal determines that the quality of the serving cell where the first relay terminal is located is lower than information of a third threshold, a specific threshold value of the third threshold can be configured in advance by a base station, and 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 measurement of RSRP/RSRQ/RSSI/SINR;

Optionally, the method further comprises:

after the first relay terminal sends the first indication information to the remote terminal, PC5 link configuration and Uu link configuration for providing relay service for the remote terminal are released; and/or

And after receiving the response information of the remote terminal aiming at the first indication information, the first relay terminal releases the PC5 link configuration and the Uu link configuration for providing the relay service for the remote terminal.

Optionally, the first relay terminal releases the link configuration of the relevant PC5 and Uu backhaul, which provide the relay service for the Remote terminal Remote UE. The specific release configuration may be any of the following:

after the first relay terminal sends first indication information to the Remote UE; and/or

And the first relay terminal receives the response of the Remote UE to the first indication information of the first relay terminal.

Optionally, the method further comprises:

under the condition that the first relay terminal is in an RRC (radio resource control) connected state, the first relay terminal sends notification information to network side equipment, wherein the notification information is used for notifying the network side equipment that the first relay terminal releases PC5 link configuration and/or Uu link configuration for providing relay service for the remote terminal;

wherein the notification information includes:

the unique identification of the remote terminal; and/or

The execution conditions met by the remote terminal.

Optionally, if the first relay terminal is in an RRC connected state, the first relay terminal notifies the base station of a behavior that the relevant PC5 and Uu backhaul configuration for providing the relay service to the Remote UE are released by the first relay terminal through notification information, where the notification information may further include:

a unique identity of the Remote UE; and/or

And the execution condition that the handover of the Remote UE meets.

It should be noted that, in the path switching method provided in the embodiment of the present application, the execution main body may be the path switching device, or a control module in the path switching device for executing the path switching method. The path switching device provided in the embodiment of the present application is described by taking a path switching method executed by a path switching device as an example.

Fig. 6 is a schematic structural diagram of a path switching apparatus according to an embodiment of the present application, and as shown in fig. 6, the apparatus includes: a first receiving module 610 and a first switching module 620; wherein:

the first receiving module 610 is configured to receive handover-related information sent by a network side device, where the handover-related information includes: the resource allocation 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;

the first switching module 620 is configured to, in a case that the remote terminal determines that any of the execution conditions is satisfied, switch, by the remote terminal, from the first path to the second path based on a resource configuration of a handover target associated with the satisfied execution condition;

Optionally, the path switching apparatus may receive, by using the first receiving module 610, handover related information sent by the network side device, that is, resource configuration of at least one handover target, and at least one set of execution conditions, where each handover target corresponds to one set of the execution conditions; then, under the condition that the remote terminal determines that any execution condition is satisfied, the first switching module 620 may switch, based on the resource configuration of the switching target associated with the satisfied execution condition, from the non-direct connection path where the remote terminal is in communication connection with the network side device through the first relay terminal to the direct connection path or the non-direct connection path where the remote terminal is in communication connection with the switching target.

C-RNTI，I-RNTI，Destination L2 ID，5G-S-TMSI。

the remote terminal determines that the radio link failure SL RLF occurs;

the remote terminal initiates the PC5 link release flow.

Optionally, the first indication information includes:

uu link quality related information; and/or

Optionally, the Uu link quality related information includes at least one of:

the first relay terminal determines that information of radio link failure Uu RLF occurs;

the first relay terminal determines information of the device abnormality.

The path switching device in the embodiment of the present application may be a device or an electronic device having an operating system, or may be a component, an integrated circuit, or a chip in a terminal. The electronic device may be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The path switching device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, which is not specifically limited in the embodiment of the present application.

The path switching device provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2 to fig. 4, and achieve the same technical effect, and is not described herein again to avoid repetition.

Fig. 7 is a second schematic structural diagram of a path switching apparatus according to an embodiment of the present application, and as shown in fig. 7, the apparatus includes: a first transmitting module 710, wherein:

the first sending module 710 is configured to send first indication information to the remote terminal, where the first indication information is used to indicate that a Uu link is abnormal.

Optionally, the path switching apparatus may send, by using the first sending module 710, first indication information to the remote terminal, where the first indication information is used to indicate that the Uu link is abnormal, so that when the remote terminal determines that the execution condition is satisfied, based on the switching related information sent by the network-side device, that is, resource configuration of at least one switching target and resource configuration of a switching target associated with the execution condition that is satisfied in at least one set of execution conditions, the remote terminal switches to a direct connection path or a non-direct connection path of the remote terminal and the switching target in communication connection through the first relay terminal and the network-side device.

Optionally, the first indication information includes:

uu link quality related information; and/or

Optionally, the Uu link quality related information includes at least one of:

the first relay terminal determines information of RRC reestablishment failure;

the first relay terminal determines information of the device abnormality.

Optionally, the apparatus further comprises:

the first release module is used for releasing the PC5 link configuration and the 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

And a second release module, configured to release the PC5 link configuration and the Uu link configuration for providing the relay service for the remote terminal after receiving the response message of the remote terminal to the first indication message.

Optionally, the apparatus further comprises:

a second sending module, configured to send, by the first relay terminal, notification information to the network side device when the first relay terminal is in an RRC connected state, where the notification information is used to notify, to 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;

wherein the notification information includes:

the unique identification of the remote terminal; and/or

The execution conditions met by the remote terminal.

The path switching device provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 5, and achieve the same technical effect, and is not described here again to avoid repetition.

Optionally, fig. 8 is a schematic structural diagram of a communication device provided in an embodiment of the present application. As shown in fig. 8, an embodiment of the present application further provides a communication device 800, which includes a processor 801, a memory 802, and a program or an instruction stored in the memory 802 and executable on the processor 801, for example, when the communication device 800 is a terminal, the program or the instruction is executed by the processor 801 to implement the processes of the foregoing path switching method embodiment, and the same technical effect can be achieved. When the communication device m00 is a network device, the program or the instruction is executed by the processor 801 to implement the processes of the embodiment of the path switching method, and the same technical effect can be achieved.

Fig. 9 is a schematic hardware structure diagram of a remote terminal according to an embodiment of the present application.

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

It will be appreciated by those skilled in the art that the remote terminal 900 may also include a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 910 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system. The terminal structure shown in fig. 9 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that, in the embodiment of the present application, the input Unit 904 may include a Graphics Processing Unit (GPU) 9041 and a microphone 9042, and the Graphics Processing Unit 9041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 906 may include a display panel 9061, and the display panel 9061 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. A touch panel 9071 also referred to as a touch screen. The touch panel 9071 may include two parts, a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In the embodiment of the present application, the radio frequency unit 901 receives information from a communication peer and then processes the information to the processor 910; and in addition, the information to be transmitted is sent to the opposite communication terminal. Generally, 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, and the like.

Memory 909 can be used to store software programs or instructions as well as various data. The memory 909 may mainly include a stored program or instruction area and a stored data area, wherein the stored program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 909 may include a high-speed random access Memory, and may also include a nonvolatile Memory, wherein the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 910 may include one or more processing units; alternatively, the processor 910 may integrate an application processor, which mainly handles operating systems, user interfaces, and applications or instructions, etc., and a modem processor, which mainly handles wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 910.

Wherein, the processor 910 is configured to:

C-RNTI，I-RNTI，Destination L2 ID，5G-S-TMSI。

the remote terminal determines that the radio link failure SL RLF occurs;

the remote terminal initiates the PC5 link release flow.

Optionally, the first indication information includes:

uu link quality related information; and/or

And switching indication information which is sent by the first relay terminal based on the Uu link quality related information.

Optionally, the Uu link quality related information includes at least one of:

the first relay terminal determines the information which cannot meet the QoS of the relay service of the remote terminal;

the first relay terminal determines information of the device abnormality.

The remote terminal embodiment in the embodiment of the present application is a product embodiment corresponding to the method embodiment, and all implementation manners in the method embodiment are applicable to the remote terminal embodiment, and may also achieve the same or similar technical effects, so that details are not repeated herein.

The first relay terminal 1000 includes, but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 10010, a user input unit 1007, an interface unit 1008, a memory 1009, a processor 1010, and the like.

Those skilled in the art will appreciate that the first relay terminal 1000 may further include a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 1010 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The terminal structure shown in fig. 10 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that, in the embodiment of the present application, the input Unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042, and the Graphics Processing Unit 10041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 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 referred to as a touch screen. The touch panel 10071 may include two parts, a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In the embodiment of the present application, after receiving information from the correspondent node, the radio frequency unit 1001 processes the information to the processor 1010; and in addition, the information to be transmitted is sent to the opposite communication terminal. In general, 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, and the like.

The memory 1009 may be used to store software programs or instructions and various data. The memory 1009 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, and the like) required for at least one function, and the like. Further, the Memory 1009 may include a high-speed random access Memory, and may further include a nonvolatile Memory, which may be a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (erasab PROM, EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 1010 may include one or more processing units; alternatively, processor 1010 may integrate an application processor that handles primarily the operating system, user interface, and application programs or instructions, and a modem processor that handles primarily wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 1010.

Wherein the processor 1010 is configured to:

Optionally, the first indication information includes:

uu link quality related information; and/or

Optionally, the Uu link quality related information includes at least one of:

the first relay terminal determines information of RRC reestablishment failure;

the first relay terminal determines information of the device abnormality.

Optionally, the processor 1010 is further configured to:

wherein the notification information includes:

the unique identification of the remote terminal; and/or

The execution conditions satisfied by the remote terminal.

The first relay terminal embodiment in the embodiment of the present application is a product embodiment corresponding to the above method embodiment, and all implementation manners in the above method embodiment are applicable to the first relay terminal embodiment, and may also achieve the same or similar technical effects, so that details are not described herein again.

As shown in fig. 11, the network-side device 1100 includes: antenna 1101, radio frequency device 1102, baseband device 1103. An antenna 1101 is connected to the radio frequency device 1102. In the uplink direction, the rf device 1102 receives information via the antenna 1101, and sends the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes information to be transmitted and transmits the processed information to the rf device 1102, and the rf device 1102 processes the received information and transmits the processed information through the antenna 1101.

The above-mentioned band processing means may be located in the baseband apparatus 1103, and the method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 1103, where the baseband apparatus 1103 includes a processor 1104 and a memory 1105.

The baseband apparatus 1103 may include at least one baseband board, for example, and a plurality of chips are disposed on the baseband board, as shown in fig. 11, where one chip, for example, the processor 1104, is connected to the memory 1105 and calls the program in the memory 1105 to perform the network device operations shown in the above method embodiments.

The baseband apparatus 1103 may further include a network interface 1106, such as a Common Public Radio Interface (CPRI), for exchanging information with the rf apparatus 1102.

Specifically, the network side device in the embodiment of the present application further includes: the instructions or programs stored in the memory 1105 and capable of being executed on the processor 1104, the processor 1104 calls the instructions or programs in the memory 1105 to perform the relevant steps in the above embodiments of the methods, and achieve the same technical effect, and are not described herein in detail in order to avoid repetition.

The network side device embodiment in the embodiment of the present application is a product embodiment corresponding to the above method embodiment, and all implementation manners in the above method embodiment are applicable to the network side device embodiment, and may also achieve the same or similar technical effects, so that details are not described herein again.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the embodiment of the path switching method, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the embodiment of the path switching method, and can achieve the same technical effect, and is not described herein again to avoid repetition.

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

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in an opposing order depending on the functionality involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for path switching, comprising:

2. The method according to claim 1, wherein in a case where the first path includes a non-direct path and the second path includes a direct path, the handover target includes: a first target cell.

3. The method according to claim 1, wherein in a case where the first path includes a non-direct path and the second path includes a non-direct path, the handover target includes: and a second target relay terminal.

4. The path switching method according to claim 3, wherein the resource configuration of the second target relay terminal comprises:

5. The path switching method according to claim 3, wherein the resource configuration of the at least one second target relay terminal includes a terminal identifier of the at least one second target relay terminal;

the system comprises a cell radio network temporary identifier C-RNTI, an inactive radio network temporary identifier I-RNTI, a Destination layer 2 identifier Destination L2 ID and a 5G system temporary mobile subscriber identity 5G-S-TMSI.

6. The path switching method according to any of claims 1-5, wherein the determining, by the remote terminal, that the PC5 link is abnormal comprises at least one of:

the remote terminal determines that the radio link failure SL RLF occurs;

the remote terminal initiates the PC5 link release flow.

7. The path switching method according to any one of claims 1 to 5, wherein the first indication information includes:

uu link quality related information; and/or

8. The path switching method according to claim 3, wherein the Uu link quality related information comprises at least one of:

the first relay terminal determines information of the device abnormality.

9. A method for path switching, comprising:

10. The path switching method according to claim 9, wherein the first indication information includes:

uu link quality related information; and/or

11. The path switching method according to claim 10, wherein the Uu link quality related information comprises at least one of:

the first relay terminal determines information of RRC reestablishment failure;

the first relay terminal determines information of the device abnormality.

12. The path switching method according to any one of claims 9 to 11, wherein the method further comprises:

13. The path switching method according to claim 9, further comprising:

wherein the notification information includes:

the unique identification of the remote terminal; and/or

The execution conditions met by the remote terminal.

14. A path switching apparatus, comprising:

a first receiving module, configured to receive handover-related information sent by a network side device, where the handover-related information includes: resource allocation 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;

15. The apparatus according to claim 14, wherein in a case where the first path includes a non-direct path and the second path includes a direct path, the handover target includes: a first target cell.

16. The apparatus according to claim 14, wherein in a case where the first path includes a non-direct path and the second path includes a non-direct path, the handover target includes: and a second target relay terminal.

17. The apparatus of claim 16, wherein the resource configuration of the second target relay terminal comprises:

18. The apparatus according to claim 16, wherein the resource configuration of the at least one second target relay terminal includes a terminal identifier of the at least one second target relay terminal;

the terminal identity of the at least one second target relay terminal comprises any one of:

C-RNTI，I-RNTI，Destination L2 ID，5G-S-TMSI。

19. the path switching apparatus according to any of claims 14-18, wherein said remote terminal determining a PC5 link anomaly comprises at least one of:

the remote terminal determines that radio link failure SL RLF occurs;

the remote terminal initiates the PC5 link release flow.

20. The path switching apparatus according to any one of claims 14 to 18, wherein the first indication information includes:

uu link quality related information; and/or

21. The path switching apparatus according to claim 16, wherein the Uu link quality related information comprises at least one of:

the first relay terminal determines information of the device abnormality.

22. A path switching apparatus, comprising:

23. The path switching apparatus according to claim 22, wherein the first indication information includes:

uu link quality related information; and/or

24. The path switching apparatus according to claim 23, wherein the Uu link quality related information comprises at least one of:

the first relay terminal determines that RRC reestablishment failure occurs;

the first relay terminal determines information of the device abnormality.

25. The path switching device according to any of claims 22-24, wherein said device further comprises:

26. The path switching apparatus according to claim 22, further comprising:

a second sending module, configured to send, by the first relay terminal, notification information to the network side device when the first relay terminal is in an RRC connected state, where the notification information is 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;

wherein the notification information includes:

a unique identifier of the remote terminal; and/or

The execution conditions met by the remote terminal.

27. A remote terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the path switching method according to any one of claims 1 to 8.

28. A first relay terminal, comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, which program or instructions, when executed by the processor, implement the steps of the path switching method according to any one of claims 9 to 13.

29. A readable storage medium, characterized in that a program or instructions are stored thereon, which program or instructions, when executed by a processor, carry out the steps of the path switching method according to any one of claims 1 to 8, or carry out the steps of the path switching method according to any one of claims 9 to 13.