WO2023087907A1 - Sidelink switching method and apparatus, and terminal, storage medium and program product - Google Patents

Abstract

A sidelink switching method and apparatus, and a terminal, a storage medium and a program product, which belong to the technical field of communications. The method comprises: when a first measurement report, which is reported by a remote terminal, is received, determining a second relay terminal, wherein the second relay terminal is a relay terminal that meets a first measurement event corresponding to the first measurement report (202); acquiring a second sidelink configuration parameter from the second relay terminal (205); sending a sidelink reconfiguration message, which includes the second sidelink configuration parameter, to the remote terminal (206), so that the remote terminal disconnects a sidelink from a first relay terminal when the second relay terminal meets a second measurement event, and establishes and configures a sidelink with the second relay terminal on the basis of the second sidelink configuration parameter.

Description

Sidelink switching method, device, terminal, storage medium and program product

This application claims the priority of the Chinese patent application with the application number 202111385258.4 and the title of the invention "Sidelink Link Switching Method, Device, Terminal, Storage Medium, and Program Product" filed on November 22, 2021, the entire content of which Incorporated in this application by reference.

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular to a sidelink switching method, device, terminal, storage medium, and program product.

Background technique

Sidelink communication is a kind of relay (relay) terminal using new air interface (New Ratio, NR) spectrum resources and access technology to directly establish a connection with a remote (remote) terminal, so as to perform application layer data transmission. technology.

In related technologies, when the sidelink between the remote terminal and the relay terminal is disconnected due to movement, the remote terminal needs to re-detect other surrounding relay terminals, so as to re-establish the sidelink with other relay terminals, And then resume data transmission.

Contents of the invention

Embodiments of the present application provide a sidelink switching method, device, terminal, storage medium, and program product. Described technical scheme is as follows:

On the one hand, an embodiment of the present application provides a sidelink link switching method, the method is used for a first relay terminal, and the method includes:

In the case of receiving the first measurement report reported by the remote terminal, determine a second relay terminal, where the second relay terminal is a relay terminal that satisfies that the first measurement report corresponds to the first measurement event;

Obtaining a second sidelink configuration parameter from the second relay terminal, where the second sidelink configuration parameter is a sidelink applied between the remote terminal and the second relay terminal configuration parameters;

sending a sidelink reconfiguration message including the second sidelink configuration parameters to the remote terminal, so that the remote terminal disconnects from the A sidelink between the first relay terminals, and establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameters.

On the other hand, an embodiment of the present application provides a sidelink link switching method, the method is used for a remote terminal, and the method includes:

When there is a second relay terminal that satisfies the first measurement event, report the first measurement report to the first relay terminal, and a sidelink link is established between the remote terminal and the first relay terminal;

receiving a sidelink reconfiguration message sent by the first relay terminal, where the sidelink reconfiguration message includes a second sidelink configuration parameter obtained from the second relay terminal, the The second sidelink configuration parameter is a configuration parameter applied to the sidelink between the remote terminal and the second relay terminal;

disconnecting the sidelink with the first relay terminal when the second relay terminal satisfies a second measurement event;

Establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameter.

On the other hand, an embodiment of the present application provides a sidelink link switching method, the method is used for a second relay terminal, and the method includes:

determining a second sidelink configuration parameter, where the second sidelink configuration parameter is a configuration parameter applied to the sidelink between the remote terminal and the second relay terminal;

sending the second sidelink configuration parameters to the first relay terminal, where the first relay terminal establishes a sidelink with the remote terminal;

When the side link between the remote terminal and the first relay terminal is disconnected, establish and configure a side link with the remote terminal.

On the other hand, an embodiment of the present application provides a sidelink switching device, the device is used for a first relay terminal, and the device includes:

A determining module, configured to determine a second relay terminal when receiving a first measurement report reported by a remote terminal, where the second relay terminal is a relay that satisfies the requirement that the first measurement report corresponds to the first measurement event terminal;

An acquisition module, configured to acquire a second sidelink configuration parameter from the second relay terminal, where the second sidelink configuration parameter is the sidelink configuration parameter between the remote terminal and the second relay terminal The configuration parameters applied by the link;

A sending module, configured to send a sidelink reconfiguration message including the second sidelink configuration parameters to the remote terminal, so that the remote terminal satisfies a second measurement event when the second relay terminal , disconnecting the sidelink with the first relay terminal, and establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameter.

On the other hand, an embodiment of the present application provides a sidelink link switching device, the device is used for a remote terminal, and the device includes:

A reporting module, configured to report a first measurement report to a first relay terminal when there is a second relay terminal that satisfies the first measurement event, and the remote terminal establishes a relationship with the first relay terminal. side link;

A receiving module, configured to receive a sidelink reconfiguration message sent by the first relay terminal, where the sidelink reconfiguration message includes the second sidelink obtained from the second relay terminal road configuration parameters, the second side link configuration parameters are configuration parameters applied to the side link between the remote terminal and the second relay terminal;

A disconnection module, configured to disconnect the sidelink with the first relay terminal when the second relay terminal satisfies a second measurement event;

An establishing module, configured to establish and configure a sidelink with the second relay terminal based on the second sidelink configuration parameters.

On the other hand, an embodiment of the present application provides a sidelink switching device, the device is used for a second relay terminal, and the device includes:

A determination module, configured to determine a second sidelink configuration parameter, where the second sidelink configuration parameter is a configuration parameter applied to the sidelink link between the remote terminal and the second relay terminal;

A sending module, configured to send the second sidelink configuration parameters to a first relay terminal, where the first relay terminal establishes a sidelink with the remote terminal;

An establishment module, configured to establish and configure a sidelink with the remote terminal when the sidelink between the remote terminal and the first relay terminal is disconnected.

On the other hand, an embodiment of the present application provides a terminal, the terminal includes a processor and a memory; the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the above aspects The switching method of the sidelink.

On the other hand, an embodiment of the present application provides a computer-readable storage medium, the storage medium stores at least one instruction, and the at least one instruction is used to be executed by a processor to implement the sidelink as described in the above aspect. switching method.

In another aspect, a computer program product is also provided, the computer program product includes at least one instruction, and the at least one instruction is loaded and executed by a processor to implement the sidelink switching method as described in the above aspect.

Description of drawings

Fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application;

FIG. 2 shows a flowchart of a sidelink switching method provided by an exemplary embodiment of the present application;

Fig. 3 is an implementation schematic diagram of a sidelink switching process shown in an exemplary embodiment of the present application;

FIG. 4 shows a flowchart of a first measurement event configuration process provided by an exemplary embodiment of the present application;

FIG. 5 shows a flow chart of a sidelink handover configuration acquisition process provided by an exemplary embodiment of the present application;

Fig. 6 is an implementation schematic diagram of a sidelink handover configuration acquisition process shown in an exemplary embodiment of the present application;

Fig. 7 is an implementation schematic diagram of a data transmission recovery process shown in an exemplary embodiment of the present application;

FIG. 8 shows a structural block diagram of a sidelink switching device provided by an embodiment of the present application;

FIG. 9 shows a structural block diagram of a sidelink switching device provided by an embodiment of the present application;

FIG. 10 shows a structural block diagram of a sidelink switching device provided by an embodiment of the present application;

Fig. 11 shows a structural block diagram of a terminal provided by an exemplary embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

The "plurality" mentioned herein means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship.

FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application. The communication system may include: a network device 110 , a relay terminal 120 and a remote terminal 130 .

The network device 110 may be a base station, and the base station is a device deployed in an access network to provide a terminal with a wireless communication function. The base station may include various forms of macro base stations, micro base stations, relay stations, access points and so on. In systems using different wireless access technologies, the names of devices with base station functions may be different, for example, in LTE systems, it is called evolved Node B (eNodeB) or eNB; in 5G new air interface (New Radio, NR) system, called gNodeB or gNB. As communications technology evolves, the description "base station" may change. For the convenience of the embodiments of the present application, the foregoing devices that provide wireless communication functions for terminals are collectively referred to as network devices.

The remote terminal 130 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment, mobile stations (Mobile Station, MS) , terminal (terminal device) and so on.

The relay terminal 120 is a device that establishes a connection with the network device 110 and establishes a connection with the remote terminal 130 . Wherein, the remote terminal 130 and the relay terminal 120 may communicate with each other through a direct communication interface (such as a PC5 interface). Correspondingly, the communication link established based on the direct communication interface may be called a side link. In a possible scenario, a connection is established between the relay terminal 120 and the network device 110 through a Uu interface, and a sidelink is established between the relay terminal 120 and the remote terminal 130 . The sidelink transmission is the direct communication data transmission between the remote terminal and the relay terminal through the sidelink. Unlike the traditional cellular system, the communication data is received or sent through the access network equipment. The sidelink transmission has It is suitable for communication between two terminal devices with close geographical location (such as vehicle equipment and other peripheral devices with close geographical location) due to the characteristics of short delay and low overhead; and, the remote terminal 130 does not need to directly communicate with the network device 110 To establish a connection, you don’t even need to be within the coverage of the network device 110. You only need to maintain the side link between the relay terminals 120 to communicate with the network side, which expands the coverage of the network device 110 in disguise and reduces network traffic to a certain extent. Spectrum resources consumed by the device.

In some embodiments, the relay terminal 120 does not move or moves within a small range after setting, while the remote terminal 130 supports free movement. For example, the relay terminal 120 is a relay device fixed in the parking lot, and the remote terminal 130 is a vehicle terminal; the relay device 120 is a VR (Virtual Reality, virtual reality)/AR (Augmented Reality, augmented reality) host , and the remote terminal 130 is a VR/AR head-mounted device. Of course, in addition to the above scenarios, the embodiments of the present application can also be used in other relay communication scenarios, which are not limited in the present application.

In a possible scenario, as shown in FIG. 1 , the network device 110 establishes connections with the first relay terminal 121 and the second relay terminal 122 at the same time, and the remote terminal 130 first establishes a sidewalk with the first relay terminal 121 link, so as to perform data communication with the network device 110 by means of the first relay terminal 121 . When the remote terminal 130 moves out of the range of the first relay terminal 121 and enters the range of the second relay terminal 122, the remote terminal 130 disconnects the side link with the first relay terminal 121, and Establish a sidelink with the second relay terminal 122, and resume data transmission. The solutions provided by the embodiments of the present application relate to the improvement of the sidelink handover process.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution system of NR system, LTE on unlicensed frequency band (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (Wireless Local Area Networks, WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), next-generation communication systems or other communication systems, etc.

In related technologies, when the sidelink between the remote terminal and the relay terminal is disconnected due to the movement of the remote terminal, the remote terminal needs to re-search for a new relay terminal and establish a connection with the searched new relay terminal. sidelink, thereby restoring data communication. During this process, the remote terminal needs to create a new radio resource bearer for the sidelink, and needs to interact with the new relay terminal multiple times, which will take a long time to restore data communication. However, in the embodiment of the present application, by adding the first measurement event and the second measurement event, the remote terminal performs measurement, and when the first measurement event is detected, the first relay terminal currently performing sidelink communication The second relay terminal satisfying the second measurement event is determined, and the configuration parameter of the sidelink is acquired from the second relay terminal, so as to transfer the configuration parameter to the remote terminal in advance. When the remote terminal detects that the second measurement event is met, it can quickly establish a sidelink with the second relay terminal based on configuration parameters after disconnecting the sidelink with the first relay terminal, and then quickly Resuming data transmission does not need to create a radio resource bearer of the sidelink, reduces interaction with the second relay terminal, and improves data communication recovery speed.

Please refer to FIG. 2 , which shows a flowchart of a sidelink switching method provided by an exemplary embodiment of the present application. In this embodiment, the method is used in the communication system shown in FIG. 1 as an example for illustration, and the process includes the following steps:

Step 201, when there is a second relay terminal satisfying the first measurement event, the remote terminal reports a first measurement report to the first relay terminal.

In a possible implementation manner, when a sidelink is established between the remote terminal and the first relay terminal, the remote terminal sends signals to the frequency point corresponding to the first relay terminal and at least one other frequency point measure, and determine whether there is a second relay terminal that satisfies the first measurement event based on the signal measurement result. If it exists, then report the first measurement report to the first relay terminal; if not, continue to detect.

In some embodiments, the first measurement event indicates that the signal quality of other frequency points is higher than the signal quality of the corresponding frequency point of the first relay terminal by a certain offset. In a possible situation, when the remote terminal moves (from the first relay terminal to other relay terminals), the signal quality of the corresponding frequency point of the first relay terminal deteriorates, while the signal quality of other frequency points The quality has improved.

Optionally, the first measurement report includes frequency point information corresponding to the second relay terminal.

Optionally, the measurement configuration corresponding to the first measurement event is configured by the first relay terminal to the remote terminal.

Schematically, as shown in FIG. 3 , when the remote terminal 130 establishes a sidelink with the first relay terminal 121, it sends signals to frequency points corresponding to the first relay terminal 121 and the second relay terminal 122. Measurement. When the frequency point corresponding to the second relay terminal 122 satisfies the first measurement event, the remote terminal 130 reports the first measurement report to the first relay terminal 121 .

Step 202, in the case of receiving the first measurement report reported by the remote terminal, the first relay terminal determines the second relay terminal.

In a possible implementation manner, after receiving the first measurement report, the first relay terminal determines the second relay terminal that satisfies the first measurement event based on the frequency information in the first measurement report, where the second The number of relay terminals is at least one.

In order to disconnect the sidelink between the remote terminal and the first relay terminal, and establish a sidelink with the second relay terminal, quickly restore the radio bearer of the sidelink, and then quickly resume data transmission , the first relay terminal needs to interact with the second relay terminal to obtain a second sidelink configuration parameter applied to the sidelink between the remote terminal and the second relay terminal.

In some embodiments, the first relay terminal establishes a sidelink with the second relay terminal, thereby interacting with the second relay terminal through the sidelink, instructing the second relay terminal to determine the second sidelink path configuration parameters.

In step 203, the second relay terminal determines a second sidelink configuration parameter, where the second sidelink configuration parameter is a configuration parameter applied to the sidelink between the remote terminal and the second relay terminal.

In a possible embodiment manner, after receiving the request sent by the first relay terminal through the sidelink, the second relay terminal determines the second sidelink configuration parameter based on the request. Optionally, the second sidelink configuration parameter is used to configure radio bearers of the sidelink, for example, Signaling Radio Bearer (Signaling Radio Bearer, SRB), Data Radio Bearer (Data Radio Bearer, DRB) resources, etc. etc., the embodiment of the present application does not limit the specific content of the configuration parameters.

Step 204, the second relay terminal sends the second sidelink configuration parameters to the first relay terminal.

Optionally, the second relay terminal sends the second sidelink configuration parameter to the first relay terminal through the sidelink.

Step 205, the first relay terminal obtains the second sidelink configuration parameter from the second relay terminal.

Optionally, the first relay terminal receives the second sidelink configuration parameter sent by the second relay terminal through the sidelink.

Schematically, as shown in FIG. 3 , after receiving the first measurement report, the first relay terminal 121 obtains the second sidelink configuration parameter from the second relay terminal 122 .

Step 206, the first relay terminal sends a sidelink reconfiguration message including the second sidelink configuration parameter to the remote terminal.

Further, the first relay terminal generates a sidelink reconfiguration message based on the second sidelink configuration parameter, and sends the sidelink reconfiguration message to the remote terminal through the sidelink with the remote terminal. terminal. Optionally, besides the second sidelink configuration parameter, the sidelink reconfiguration message also includes the measurement configuration of the second measurement event, so that the remote terminal can continue to measure the second measurement event.

Schematically, as shown in FIG. 3 , the first relay terminal 121 sends a sidelink reconfiguration message to the remote terminal 130 .

Step 207, the remote terminal receives the sidelink reconfiguration message sent by the first relay terminal.

Optionally, after receiving the sidelink reconfiguration message, the remote terminal stores the configuration parameters of the second sidelink, and continues to perform signal measurement on the frequency points corresponding to the first relay terminal and the second relay terminal . Wherein, when there are at least two second relay terminals, the remote terminal associates and stores the frequency point information and the second sidelink configuration parameters corresponding to each second relay terminal.

Step 208, when the second relay terminal satisfies the second measurement event, the remote terminal disconnects the sidelink with the first relay terminal.

When the signal quality of the second relay terminal satisfies the second measurement event, the remote terminal determines that the quality of the service provided by the first relay terminal cannot meet the requirement, and disconnects the sidelink with the first relay terminal.

In some embodiments, the second measurement event indicates that the signal quality of the frequency point corresponding to other relay terminals is higher than the first threshold, and the signal quality of the frequency point corresponding to the first relay terminal is lower than the second threshold.

Step 209, the remote terminal establishes and configures a sidelink with the second relay terminal based on the second sidelink configuration parameter.

Since the signal quality of the second relay terminal is better, the remote terminal establishes a sidelink with the second relay terminal, and since the remote terminal pre-stores the configuration parameters of the second sidelink, the remote terminal can apply the configuration The parameter configures the radio bearer of the sidelink (no need to go through the radio bearer establishment process), and then resumes the data transmission of the sidelink.

Schematically, as shown in FIG. 3, after the remote terminal 130 leaves the coverage of the first relay terminal 121 due to movement and enters the coverage of the second relay terminal 122, the remote terminal 130 determines through signal measurement that the second The event is measured, thereby disconnecting the sidelink with the first relay terminal 121, establishing and configuring a sidelink with the second relay terminal 122, and resuming data transmission.

Step 210, when the sidelink between the remote terminal and the first relay terminal is disconnected, the second relay terminal establishes and configures a sidelink with the remote terminal.

Correspondingly, the second relay terminal establishes and configures a side link with the remote terminal, and then serves as an intermediary between the remote terminal and the network device 110 to implement data transmission.

To sum up, in the embodiment of the present application, if there is a second relay terminal that satisfies the first measurement event, after the remote terminal reports the first measurement report to the first relay terminal, the first relay terminal starts from the second relay terminal. The second relay terminal obtains the second sidelink configuration parameters that need to be applied to establish the sidelink between the remote terminal and the second relay terminal, and reconfigures the sidelink that includes the second sidelink configuration parameters. The message is sent to the remote terminal. Since the remote terminal obtains the configuration parameters applied when establishing a sidelink with the second relay terminal in advance, when it detects that the second measurement event is satisfied, the remote terminal can disconnect from the second relay terminal. In the case of a sidelink between a relay terminal, quickly establish a sidelink with the second relay terminal based on the configuration parameters of the second sidelink, and then quickly resume data transmission, and the scene where the remote terminal moves In this way, the speed at which the remote terminal rebuilds the sidelink and resumes data transmission is improved, and the impact of remote terminal movement on data transmission is reduced.

Regarding the first measurement event and the second measurement event in the above embodiment, in a possible implementation manner, the first measurement configuration information corresponding to the first measurement event includes the dedicated offset (Ofn) of the candidate frequency point, the first The specific offset (Ofp) of the corresponding frequency point of the relay terminal, the hysteresis parameter (Hys) of the first measurement event, and the offset parameter (Off) of the first measurement event, and, when Mn+Ofn–Hys>Mp+Ofp+ When Off (the entry condition of the first measurement event), the remote terminal determines that the candidate frequency satisfies the first measurement event, where Mn is the measurement result of the candidate frequency, and Mp is the measurement result of the corresponding frequency of the first relay terminal.

Among them, for Mn and Mp, if the measurement result is Reference Signal Receiving Power (RSRP), the unit is dBm; if the measurement result is Reference Signal Receiving Quality (RSRQ) or Reference Signal Noise Ratio (Reference Signal-Signal to Interference plus Noise Ratio, RS-SINR), the unit is dB. For Ofn, Ofp, Hys and Off, the unit is dB.

Correspondingly, when Mn+Ofn+Hys<Mp+Ofp+Off (exit condition of the first measurement event), the remote terminal determines that the candidate frequency point does not satisfy the first measurement event.

In some embodiments, the first measurement configuration information further includes a first timer duration. When the entry condition of the first measurement event is met, the remote terminal starts a timer (the duration is the duration of the first timer). If the timer expires, it is determined that the first measurement event is met; when the exit condition of the first measurement event is met, the remote terminal starts the timer. If the timer expires, it is determined that the first measurement event is not met.

In a possible implementation manner, the second measurement configuration information corresponding to the second measurement event includes the dedicated offset (Ofn) of the target frequency point, the hysteresis parameter (Hys) of the second measurement event, the first threshold (Thresh1) and Second threshold (Thresh2). When Mp+Hys<Thresh1, and Mn+Ofn–Hys>Thresh2 (the entry condition of the second measurement event), the target frequency point meets the second measurement event, Mn is the measurement result of the target frequency point, and Mp is the first relay The measurement result of the corresponding frequency point of the terminal.

Wherein, for Mn, Mp, Thresh1 and Thresh2, if the measurement result is RSRP, the unit is dBm; if the measurement result is RSRQ or RS-SINR, the unit is dB. For Ofn and Hys, the unit is dB.

Correspondingly, when Mp−Hys>Thresh1, or Mn+Ofn+Hys<Thresh2 (exit condition of the second measurement event), the remote terminal determines that the target frequency point does not satisfy the second measurement event.

In some embodiments, the second measurement configuration information further includes a second timer duration. When the entry condition of the second measurement event is satisfied, the remote terminal starts a timer (the duration is the duration of the second timer). If the timer expires, it is determined that the second measurement event is met; when the exit condition of the second measurement event is met, the remote terminal starts the timer. If the timer expires, it is determined that the second measurement event is not met.

In a possible implementation manner, the first relay terminal may pre-obtain frequency point information of other nearby relay terminals, and after establishing a sidelink link with the remote terminal, configure the first relay terminal for the remote terminal based on the frequency point information. The measurement object that measures the event. The following uses an exemplary embodiment for description.

Please refer to FIG. 4 , which shows a flow chart of a first measurement event configuration process provided by an exemplary embodiment of the present application. In this embodiment, the method is used in the communication system shown in FIG. 1 as an example for illustration, and the process includes the following steps:

Step 401, the first relay terminal detects candidate relay terminals in the surrounding environment.

In a possible implementation manner, when the detection condition is met, the first relay terminal detects other candidate relay terminals existing in the surrounding environment. Wherein, the process of detecting by the first relay terminal is the process of acquiring frequency point information corresponding to other candidate relay terminals.

Optionally, the detection condition may include at least one of the following:

1. When the first relay terminal is turned on;

2. When the periodic timer set in the first relay terminal times out;

3. When the first relay terminal establishes a sidelink with the new remote terminal.

Step 402, when a candidate relay terminal is detected and a sidelink is successfully established with the candidate relay terminal, the first relay terminal acquires frequency point information of the candidate relay terminal.

For the detected candidate relay terminal, the first relay terminal tries to establish a sidelink with the candidate relay terminal. If the sidelink is established successfully, the first relay terminal obtains the frequency point of the candidate relay terminal information, wherein the frequency point information can be obtained from candidate relay terminals through the established sidelink.

Optionally, after acquiring the frequency point information, the first relay terminal disconnects the sidelink with the candidate relay terminal.

In step 403, the first relay terminal establishes a correspondence between candidate frequency points and candidate relay terminals based on the frequency point information.

For the candidate relay terminal that has obtained the frequency point information, the first relay terminal associates and stores the candidate relay terminal and the candidate frequency point based on the frequency point information, and obtains the corresponding relationship between the candidate frequency point and the candidate relay terminal, In order to subsequently configure the first measurement event based on the corresponding relationship, and identify a candidate relay terminal that satisfies the first measurement event.

In an illustrative example, the corresponding relationship between candidate frequency points and candidate relay terminals is shown in Table 1.

Table I

Candidate frequency Candidate relay terminal Frequency 1 relay terminal A Frequency 2 relay terminal B Frequency 3 relay terminal C

Step 404, the first relay terminal sends a measurement configuration message to the remote terminal, where the measurement configuration message includes first measurement configuration information of the first measurement event and candidate frequency points.

After the sidelink is established with the remote terminal, the first relay terminal sends a measurement configuration message for each candidate relay terminal to the remote terminal through the sidelink, and the measurement configuration message includes the frequency point information of the candidate frequency point and first measurement configuration information. For the content contained in the first measurement configuration information, reference may be made to the foregoing embodiments, and details are not described in this embodiment here.

Step 405, the remote terminal receives the measurement configuration message sent by the first relay terminal.

Correspondingly, the remote terminal receives the measurement configuration message sent by the first relay terminal through the sidelink.

Step 406, the remote terminal measures the candidate frequency points based on the first measurement configuration information.

In some embodiments, the remote terminal determines the measurement object based on the candidate frequency points included in the measurement configuration message, and determines whether the candidate frequency points satisfy the first measurement event based on the measurement result and the first measurement configuration information. If so, the remote terminal sends the first relay terminal to report the first measurement report including the candidate frequency point, and then performs a subsequent handover process of the sidelink.

In a possible implementation manner, when receiving the first measurement report reported by the remote terminal, the first relay terminal obtains the target frequency point contained in the first measurement report (that is, the target frequency point that satisfies the first measurement event) frequency point), and then based on the corresponding relationship between the candidate frequency point and the candidate relay terminal, determine the second relay terminal corresponding to the target frequency point.

As shown in Table 1, the remote terminal performs signal measurement on frequency point 1, frequency point 2, and frequency point 3, and reports the first measurement report including "frequency point 2" based on the signal measurement results. The first relay terminal determines that relay terminal B satisfies the first measurement event based on "frequency point 2".

In the above embodiment, the first relay terminal actively detects the surrounding candidate relay terminals (that is, the corresponding relationship between the candidate frequency point and the candidate relay terminal is obtained by the first relay terminal) as an example. In another possibility In the embodiment, if the relay terminal is fixed or can only move within a small range, since the networking mode does not change frequently, the corresponding relationship between candidate frequency points and candidate relay terminals can also be set in the first In the configuration information of the relay terminal, for example, the corresponding relationship is set when the first relay terminal leaves the factory, so that the first relay terminal does not need to actively detect other relay terminals.

Of course, in other possible implementation manners, the preset and active detection may also be combined, which is not limited in this embodiment.

In the case where the first relay terminal and the remote terminal have established a sidelink link, the first relay terminal knows the first sidelink configuration parameters of the current sidelink, in order to improve the subsequent remote terminal and the second relay terminal The configuration efficiency of the side link between the two, the first relay terminal can provide the first side link configuration parameter to the second relay terminal, and the second relay terminal determines the configuration efficiency based on the first side link configuration parameter The second sidelink configuration parameters applicable to itself are fed back to the first relay terminal, and then the first relay terminal sends it to the remote terminal in advance. The following uses an exemplary embodiment for description.

Please refer to FIG. 5 , which shows a flow chart of a sidelink handover configuration acquisition process provided by an exemplary embodiment of the present application. In this embodiment, the method is used in the communication system shown in FIG. 1 as an example for illustration, and the process includes the following steps:

Step 501, in the case that there is a second relay terminal satisfying the first measurement event, the remote terminal reports a first measurement report to the first relay terminal.

Step 502, in the case of receiving the first measurement report reported by the remote terminal, the first relay terminal determines the second relay terminal.

For the implementation manner of the foregoing steps 501 to 502, reference may be made to the foregoing embodiments, and details are not described herein in this embodiment.

Step 503, the first relay terminal sends a sidelink handover preparation message to the second relay terminal through the sidelink with the second relay terminal.

In a possible implementation manner, after the second relay terminal is determined, the first relay terminal first establishes a first sidelink with the second relay terminal, and sends a message to the second relay terminal through the sidelink. The subsequent terminal sends a sidelink handover preparation request. Wherein, the sidelink handover preparation message includes first sidelink configuration parameters of the sidelink between the first relay terminal and the remote terminal. In some embodiments, the first sidelink configuration parameter is used to configure a radio bearer of the sidelink between the first relay terminal and the remote terminal.

Schematically, as shown in FIG. 6, after receiving the first measurement report sent by the remote terminal 130, the first relay terminal 121 sends a HandoverPreparationInformationSidelink message to the second relay terminal 122, and the message includes the first sidelink Configuration parameters (rrcReconfiguration).

Optionally, in addition to the first sidelink configuration parameter, the sidelink handover preparation message may also include a transmitter identifier and a receiver identifier, where the transmitter identifier is used to characterize the sidelink (first Between the relay terminal and the remote terminal), the identifier of the receiving end is used to characterize the receiving end in the sidelink.

Schematically, the identifier of the sending end is Source Layer-2 ID, and the identifier of the receiving end is Destination Layer-2 ID, both of which are 24-bit unique identifiers.

Step 504, the second relay terminal receives the sidelink handover preparation message sent by the first relay terminal through the sidelink with the first relay terminal.

Correspondingly, the first relay terminal receives the sidelink handover preparation message through the sidelink, and acquires the first sidelink configuration parameter contained therein.

Step 505, the second relay terminal determines a second sidelink configuration parameter based on the first sidelink configuration parameter.

Since different relay terminals have different spare resources, the second relay terminal needs to determine the second sidelink configuration parameters based on the current spare resources after acquiring the first sidelink configuration parameters. In a possible implementation manner, the second relay terminal determines the second sidelink configuration parameter based on the first sidelink configuration parameter and its current free DRB resources.

In an illustrative example, the second relay terminal generates Ho-RRCReconfigurationSidelink (second sidelink configuration parameter) based on rrcReconfiguration based on the current free resources.

It should be noted that, when the sidelink switching preparation message includes the identifier of the sending end and the identifier of the receiving end, the second relay terminal stores the identifier of the sending end and the identifier of the receiving end, so as to subsequently establish a sidelink with the remote terminal Finally, specify the sender and receiver in the link.

Step 506, the second relay terminal sends a sidelink switching confirmation message to the first relay terminal through the sidelink with the first relay terminal.

Further, the second relay terminal generates a sidelink switching confirmation message based on the determined second sidelink configuration parameter, and sends it to the first relay terminal through the sidelink.

Schematically, as shown in FIG. 6, the second relay terminal 122 sends a HandoverCommandSidelink message including Ho-RRCReconfigurationSidelink to the first relay terminal 121.

Step 507, the first relay terminal receives the sidelink switching confirmation message sent by the second relay terminal through the sidelink with the second relay terminal.

Correspondingly, the first relay terminal receives the sidelink switching confirmation message through the sidelink. Optionally, after receiving the sidelink switching confirmation message, the sidelink between the first relay terminal and the second relay terminal is disconnected.

Step 508, the first relay terminal sends a sidelink reconfiguration message including the second sidelink configuration parameters and the second measurement configuration information to the remote terminal.

After receiving the sidelink switching confirmation message, it indicates that the second relay terminal can meet the data transmission requirements of the remote terminal, so that the second measurement configuration based on the second sidelink configuration parameters in the message and the second measurement event The information generates a sidelink reconfiguration message, and sends the sidelink reconfiguration message to the remote terminal in advance before the remote terminal leaves the coverage of the first relay terminal.

Schematically, as shown in FIG. 6, after receiving the HandoverCommandSidelink message, the first relay terminal 121 sends the RRCReconfigurationSidelink message including Ho-RRCReconfigurationSidelink and sl-MeasConfig-r16 (second measurement configuration information) to the remote terminal 130.

So far, the second relay terminal knows in advance the remote terminal that needs to switch the sidelink later, and the remote terminal knows in advance the sidelink configuration parameters used when establishing the sidelink with the second relay terminal. When the signal quality of the first relay terminal and the second relay terminal meets the second measurement event, the remote terminal establishes a sidelink with the second relay terminal, and configures the sidelink based on the sidelink configuration parameters acquired in advance radio bearer, thereby resuming data transmission.

In a possible implementation manner, after completing the sidelink configuration, the remote terminal sends a sidelink reconfiguration complete message to the second relay terminal, and the second relay terminal receives the sidelink reconfiguration message sent by the remote terminal. After the reconfiguration complete message, data transmission on the sidelink is resumed based on the identifier of the sending end and the identifier of the receiving end.

Optionally, based on the terminal ID of the remote terminal, the second relay terminal detects whether it belongs to the ID of the sending end or the ID of the receiving end, and if so, determines the sending end and the receiving end of the sidelink link with the remote terminal, thereby recovering the data transmission.

Schematically, as shown in FIG. 7, the HandoverPreparationInformationSidelink message sent by the first relay terminal 121 to the second relay terminal 122 includes a Source Layer-2 ID and a Destination Layer-2 ID, and the second relay terminal 122 performs storage. After subsequently receiving the RRCReconfigurationCompleteSidelink message sent by the remote terminal 130, it is determined that the terminal identifier of the remote terminal 130 is consistent with the Destination Layer-2 ID, thereby resuming data transmission to the remote terminal 130 through the sidelink.

Please refer to FIG. 8 , which shows a structural block diagram of a sidelink switching device provided by an embodiment of the present application. The device may be implemented as all or a part of the first relay terminal 121 in FIG. 1 through software, hardware or a combination of the two. The unit includes:

The determining module 801 is configured to determine a second relay terminal in the case of receiving a first measurement report reported by a remote terminal, and the second relay terminal is a center that satisfies the requirement that the first measurement report corresponds to the first measurement event. following terminal;

An acquiring module 802, configured to acquire a second sidelink configuration parameter from the second relay terminal, where the second sidelink configuration parameter is a side link between the remote terminal and the second relay terminal The configuration parameters applied by the uplink;

A sending module 803, configured to send a sidelink reconfiguration message including the second sidelink configuration parameters to the remote terminal, so that the remote terminal meets the second measurement event at the second relay terminal , disconnecting the sidelink with the first relay terminal, and establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameter.

Optionally, the determination module 801 includes:

An acquiring unit, configured to acquire a target frequency point included in the first measurement report when the first measurement report reported by the remote terminal is received, the target frequency point is to meet the requirements of the first measurement frequency of events;

A determining unit, configured to determine the second relay terminal corresponding to the target frequency point based on the correspondence between candidate frequency points and candidate relay terminals.

Optionally, the correspondence between the candidate frequency point and the candidate relay terminal is detected by the first relay terminal, or is set in configuration information of the first relay terminal.

Optionally, the corresponding relationship between the candidate frequency point and the candidate relay terminal is obtained by detecting the first relay terminal;

The device also includes:

a relationship establishing module, configured to detect the candidate relay terminals in the surrounding environment;

Acquiring frequency point information of the candidate relay terminal when the candidate relay terminal is detected and a sidelink is successfully established with the candidate relay terminal;

Establishing a correspondence between the candidate frequency points and the candidate relay terminals based on the frequency point information.

Optionally, the device also includes:

The sending module 803 is further configured to send a measurement configuration message to the remote terminal, where the measurement configuration message includes the first measurement configuration information of the first measurement event and the candidate frequency points, and the remote terminal uses and performing measurement on the candidate frequency points based on the first measurement configuration information.

Optionally, the first measurement configuration information includes the dedicated offset Ofn of the candidate frequency point, the dedicated offset Ofp of the corresponding frequency point of the first relay terminal, the hysteresis parameter Hys of the first measurement event, and The offset parameter Off of the first measurement event;

Wherein, when Mn+Ofn-Hys>Mp+Ofp+Off, the candidate frequency point satisfies the first measurement event, Mn is the measurement result of the candidate frequency point, and Mp is the first relay terminal corresponding Frequency measurement results.

Optionally, the obtaining module 802 is configured to:

Send a sidelink handover preparation message to the second relay terminal through the sidelink with the second relay terminal, the sidelink handover preparation message including the first relay a first sidelink configuration parameter of the sidelink between the terminal and the remote terminal;

Receive a sidelink switching confirmation message sent by the second relay terminal through the sidelink with the second relay terminal, and the sidelink switching confirmation message includes the second A sidelink configuration parameter, the second sidelink configuration parameter is determined based on the first sidelink configuration parameter.

Optionally, the sidelink handover preparation message also includes a transmitter ID and a receiver ID, the transmitter ID is used to characterize the transmitter in the sidelink, and the receiver ID is used to characterize the side link The receiving end in the uplink, the second relay terminal is used to store the identifier of the sending end and the identifier of the receiving end, so as to resume the data transmission of the sidelink based on the identifier of the sending end and the identifier of the receiving end.

Optionally, the sidelink reconfiguration message includes second measurement configuration information of the second measurement event, and the second measurement configuration information includes the dedicated offset Ofn of the target frequency point, the Hysteresis parameter Hys, first threshold Thresh1 and second threshold Thresh2 of the second measurement event;

Wherein, when Mp+Hys<Thresh1, and Mn+Ofn-Hys>Thresh2, the target frequency point satisfies the second measurement event, Mn is the measurement result of the target frequency point, and Mp is the first middle Follow up the measurement results of the corresponding frequency points of the terminal.

Please refer to FIG. 9 , which shows a structural block diagram of a sidelink switching device provided by an embodiment of the present application. The device can be implemented as all or part of the remote terminal 130 in FIG. 1 through software, hardware or a combination of the two. The unit includes:

The reporting module 901 is configured to report a first measurement report to a first relay terminal when there is a second relay terminal that satisfies the first measurement event, and the remote terminal is established with the first relay terminal. with sidelinks;

A receiving module 902, configured to receive a sidelink reconfiguration message sent by the first relay terminal, where the sidelink reconfiguration message includes the second sidelink obtained from the second relay terminal Link configuration parameters, the second sidelink configuration parameters are configuration parameters applied to the sidelink link between the remote terminal and the second relay terminal;

A disconnection module 903, configured to disconnect the sidelink with the first relay terminal when the second relay terminal satisfies a second measurement event;

The establishment module 904 is configured to establish and configure a sidelink with the second relay terminal based on the second sidelink configuration parameter.

Optionally, the receiving module 902 is further configured to receive a measurement configuration message sent by the first relay terminal, where the measurement configuration message includes first measurement configuration information of the first measurement event and candidate frequency points , the candidate frequency point is a frequency point corresponding to the candidate relay terminal;

A measurement module, configured to measure the candidate frequency points based on the first measurement configuration information.

Optionally, the first measurement configuration information includes the dedicated offset Ofn of the candidate frequency point, the dedicated offset Ofp of the corresponding frequency point of the first relay terminal, the hysteresis parameter Hys of the first measurement event, and The offset parameter Off of the first measurement event;

Wherein, when Mn+Ofn-Hys>Mp+Ofp+Off, the candidate frequency point satisfies the first measurement event, Mn is the measurement result of the candidate frequency point, and Mp is the first relay terminal corresponding Frequency measurement results.

Optionally, the sidelink reconfiguration message includes second measurement configuration information of the second measurement event, and the second measurement configuration information includes the dedicated offset Ofn of the target frequency point, the second Measuring a hysteresis parameter Hys, a first threshold Thresh1, and a second threshold Thresh2 of an event, the target frequency point being a frequency point corresponding to the second relay terminal;

Wherein, when the Mp+Hys<Thresh1, and Mn+Ofn-Hys>Thresh2, the target frequency point satisfies the second measurement event, Mn is the measurement result of the target frequency point, and Mp is the first A measurement result corresponding to a frequency point of the relay terminal.

Optionally, the device also includes:

A sending module, configured to send a sidelink reconfiguration complete message to the second relay terminal, so that the second relay terminal can identify the remote terminal based on the identifier of the sending end and the identifier of the receiving end, and restore the sidelink In the data transmission of the road, the sending end identifier is used to represent the sending end in the sidelink, and the receiving end identifier is used to represent the receiving end in the sidelink.

Please refer to FIG. 10 , which shows a structural block diagram of a sidelink switching device provided by an embodiment of the present application. The apparatus may be implemented as all or part of the second relay terminal 122 in FIG. 1 through software, hardware or a combination of the two. The unit includes:

A determining module 1001, configured to determine a second sidelink configuration parameter, where the second sidelink configuration parameter is a configuration parameter applied to the sidelink between the remote terminal and the second relay terminal;

A sending module 1002, configured to send the second sidelink configuration parameters to the first relay terminal, where the first relay terminal establishes a sidelink with the remote terminal;

An establishing module 1003, configured to establish and configure a sidelink with the remote terminal when the sidelink between the remote terminal and the first relay terminal is disconnected.

Optionally, the determining module 1001 is configured to:

Receive a sidelink handover preparation message sent by the first relay terminal through the sidelink with the first relay terminal, where the sidelink handover preparation message includes the first a first sidelink configuration parameter of the sidelink between the secondary terminal and the remote terminal;

determining the second sidelink configuration parameter based on the first sidelink configuration parameter;

The sending module 1002 is configured to:

Send a sidelink switching confirmation message to the first relay terminal through the sidelink with the first relay terminal, and the sidelink switching confirmation message includes the second side Link configuration parameters.

Optionally, the sidelink handover preparation message also includes a transmitter ID and a receiver ID, the transmitter ID is used to characterize the transmitter in the sidelink, and the receiver ID is used to characterize the side link Receiver in the uplink;

The sending module 1002 is also used for:

If the sidelink reconfiguration completion message sent by the remote terminal is received, data transmission of the sidelink is resumed based on the identifier of the sending end and the identifier of the receiving end.

Please refer to FIG. 11 , which shows a structural block diagram of a terminal provided by an exemplary embodiment of the present application. The terminal can be referred to as a relay terminal or a remote terminal in FIG. 1 . The terminal in this application may include one or more of the following components: a processor 1101 , a memory 1102 , a receiver 1103 and a transmitter 1104 .

Processor 1101 may include one or more processing cores. The processor 1101 uses various interfaces and lines to connect various parts of the entire terminal, and executes the terminal by running or executing instructions, programs, code sets or instruction sets stored in the memory 1102, and calling data stored in the memory 1102. Various functions and processing data. Optionally, the processor 1101 may adopt at least one of Digital Signal Processing (Digital Signal Processing, DSP), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), and Programmable Logic Array (Programmable Logic Array, PLA). implemented in the form of hardware. The processor 1101 can integrate one or more of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), a neural network processor (Neural-network Processing Unit, NPU) and a modem, etc. The combination. Among them, the CPU mainly handles the operating system, user interface and application programs, etc.; the GPU is used to render and draw the content that needs to be displayed on the touch screen; the NPU is used to realize the artificial intelligence (Artificial Intelligence, AI) function; the modem is used to process Wireless communication. It can be understood that the foregoing modem may also not be integrated into the processor 1101, but implemented by a single chip.

The memory 1102 may include random access memory (Random Access Memory, RAM), and may also include read-only memory (Read-Only Memory, ROM). Optionally, the memory 1102 includes a non-transitory computer-readable storage medium. The memory 1102 may be used to store instructions, programs, codes, sets of codes, or sets of instructions. The memory 1102 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), Instructions and the like for implementing the following method embodiments; the storage data area can store data created according to the use of the terminal 13 (such as audio data, phonebook) and the like.

The receiver 1103 and the transmitter 1104 can be realized as a communication component, and the communication component can be a communication chip.

In addition, those skilled in the art can understand that the structure of the terminal shown in the above drawings does not constitute a limitation on the terminal, and the terminal may include more or less components than those shown in the figure, or combine certain components, or different component arrangements. For example, the terminal also includes camera components, input units, sensors (such as acceleration sensors, angular velocity sensors, light sensors, etc.), audio circuits, wireless fidelity (Wireless Fidelity, WiFi) modules, power supplies, Bluetooth modules and other components, here No longer.

The embodiment of the present application also provides a computer-readable medium, the computer-readable medium stores at least one instruction, and the at least one instruction is loaded and executed by a processor to realize the sidelink link described in the above various embodiments. Switch method.

The embodiment of the present application also provides a computer program product, the computer program product stores at least one instruction, and the at least one instruction is loaded and executed by a processor to implement the sidelink switching method described in the above embodiments .

Those skilled in the art should be aware that, in the foregoing one or more examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above are only optional embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims (23)

A method for switching sidelinks, the method is used for a first relay terminal, and the method includes: In the case of receiving the first measurement report reported by the remote terminal, determine a second relay terminal, where the second relay terminal is a relay terminal that satisfies that the first measurement report corresponds to the first measurement event; Obtaining a second sidelink configuration parameter from the second relay terminal, where the second sidelink configuration parameter is a sidelink applied between the remote terminal and the second relay terminal configuration parameters; sending a sidelink reconfiguration message including the second sidelink configuration parameters to the remote terminal, so that the remote terminal disconnects from the A sidelink between the first relay terminals, and establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameters. The method according to claim 1, wherein, in the case of receiving the first measurement report reported by the remote terminal, determining the second relay terminal comprises: When the first measurement report reported by the remote terminal is received, acquire a target frequency point included in the first measurement report, where the target frequency point is a frequency point satisfying the first measurement event; The second relay terminal corresponding to the target frequency point is determined based on the corresponding relationship between the candidate frequency point and the candidate relay terminal. The method according to claim 2, wherein the corresponding relationship between the candidate frequency point and the candidate relay terminal is detected by the first relay terminal, or is set in the configuration of the first relay terminal information. The method according to claim 3, wherein the corresponding relationship between the candidate frequency point and the candidate relay terminal is obtained by detection of the first relay terminal; The method also includes: detecting the candidate relay terminals in the surrounding environment; Acquiring frequency point information of the candidate relay terminal when the candidate relay terminal is detected and a sidelink is successfully established with the candidate relay terminal; Establishing a correspondence between the candidate frequency points and the candidate relay terminals based on the frequency point information. The method according to claim 2, wherein, in the case of receiving the first measurement report reported by the remote terminal, before determining the second relay terminal, the method further comprises: sending a measurement configuration message to the remote terminal, where the measurement configuration message includes first measurement configuration information of the first measurement event and the candidate frequency points, and the remote terminal is used to Measure the candidate frequency points. The method according to claim 5, wherein the first measurement configuration information includes the dedicated offset Ofn of the candidate frequency point, the dedicated offset Ofp of the corresponding frequency point of the first relay terminal, the first a hysteresis parameter Hys of the measurement event and an offset parameter Off of the first measurement event; Wherein, when Mn+Ofn-Hys>Mp+Ofp+Off, the candidate frequency point satisfies the first measurement event, Mn is the measurement result of the candidate frequency point, and Mp is the first relay terminal corresponding Frequency measurement results. The method according to any one of claims 1 to 6, wherein said obtaining the second sidelink configuration parameters from the second relay terminal comprises: Send a sidelink handover preparation message to the second relay terminal through the sidelink with the second relay terminal, the sidelink handover preparation message including the first relay a first sidelink configuration parameter of the sidelink between the terminal and the remote terminal; Receive a sidelink switching confirmation message sent by the second relay terminal through the sidelink with the second relay terminal, and the sidelink switching confirmation message includes the second A sidelink configuration parameter, the second sidelink configuration parameter is determined based on the first sidelink configuration parameter. The method according to claim 7, wherein the sidelink handover preparation message further includes a transmitter identifier and a receiver identifier, and the transmitter identifier is used to characterize the transmitter in the sidelink, the The receiving terminal identifier is used to characterize the receiving terminal in the side link, and the second relay terminal is used to store the transmitting terminal identifier and the receiving terminal identifier, so as to restore the side link based on the transmitting terminal identifier and the receiving terminal identifier. Link data transmission. The method according to any one of claims 1 to 6, wherein the sidelink reconfiguration message includes second measurement configuration information of the second measurement event, and the second measurement configuration information includes the The dedicated offset Ofn of the target frequency point, the hysteresis parameter Hys of the second measurement event, the first threshold Thresh1 and the second threshold Thresh2; Wherein, when Mp+Hys<Thresh1, and Mn+Ofn-Hys>Thresh2, the target frequency point satisfies the second measurement event, Mn is the measurement result of the target frequency point, and Mp is the first middle Follow up the measurement results of the corresponding frequency points of the terminal. A sidelink switching method, the method is used for a remote terminal, the method comprising: When there is a second relay terminal that satisfies the first measurement event, report the first measurement report to the first relay terminal, and a sidelink link is established between the remote terminal and the first relay terminal; receiving a sidelink reconfiguration message sent by the first relay terminal, where the sidelink reconfiguration message includes a second sidelink configuration parameter obtained from the second relay terminal, the The second sidelink configuration parameter is a configuration parameter applied to the sidelink between the remote terminal and the second relay terminal; disconnecting the sidelink with the first relay terminal when the second relay terminal satisfies a second measurement event; Establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameter. The method according to claim 10, wherein, in the case that there is a second relay terminal satisfying the first measurement event, before reporting the first measurement report to the first relay terminal, the method comprises: Receive a measurement configuration message sent by the first relay terminal, where the measurement configuration message includes first measurement configuration information of the first measurement event and candidate frequency points, where the candidate frequency points are corresponding to the candidate relay terminal Frequency; The candidate frequency points are measured based on the first measurement configuration information. The method according to claim 11, wherein the first measurement configuration information includes the dedicated offset Ofn of the candidate frequency point, the dedicated offset Ofp of the corresponding frequency point of the first relay terminal, the first a hysteresis parameter Hys of the measurement event and an offset parameter Off of the first measurement event; Wherein, when Mn+Ofn-Hys>Mp+Ofp+Off, the candidate frequency point satisfies the first measurement event, Mn is the measurement result of the candidate frequency point, and Mp is the first relay terminal corresponding Frequency measurement results. The method according to any one of claims 10 to 12, wherein the sidelink reconfiguration message includes second measurement configuration information of the second measurement event, and the second measurement configuration information includes target frequency A point-specific offset Ofn, a hysteresis parameter Hys of the second measurement event, a first threshold Thresh1, and a second threshold Thresh2, the target frequency point being a frequency point corresponding to the second relay terminal; Wherein, when the Mp+Hys<Thresh1, and Mn+Ofn-Hys>Thresh2, the target frequency point satisfies the second measurement event, Mn is the measurement result of the target frequency point, and Mp is the first A measurement result corresponding to a frequency point of the relay terminal. The method according to any one of claims 10 to 12, wherein, after establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameter, the method includes: sending a sidelink reconfiguration complete message to the second relay terminal, so that the second relay terminal identifies the remote terminal based on the sender identifier and the receiver identifier, and resumes data transmission on the sidelink, The sending end identifier is used to characterize the sending end in the sidelink, and the receiving end identifier is used to characterize the receiving end in the sidelink. A method for switching sidelinks, the method is used for a second relay terminal, and the method includes: determining a second sidelink configuration parameter, where the second sidelink configuration parameter is a configuration parameter applied to the sidelink between the remote terminal and the second relay terminal; sending the second sidelink configuration parameters to the first relay terminal, where the first relay terminal establishes a sidelink with the remote terminal; If the sidelink between the remote terminal and the first relay terminal is disconnected, establish and configure a sidelink with the remote terminal. The method according to claim 15, wherein said determining the second sidelink configuration parameter comprises: Receive a sidelink handover preparation message sent by the first relay terminal through the sidelink with the first relay terminal, where the sidelink handover preparation message includes the first a first sidelink configuration parameter of the sidelink between the secondary terminal and the remote terminal; determining the second sidelink configuration parameter based on the first sidelink configuration parameter; The sending the second sidelink configuration parameters to the first relay terminal includes: Send a sidelink switching confirmation message to the first relay terminal through the sidelink with the first relay terminal, and the sidelink switching confirmation message includes the second side Link configuration parameters. The method according to claim 16, wherein the sidelink handover preparation message further includes a sender ID and a receiver ID, the sender ID is used to characterize the sender in the sidelink, the The receiving end identification is used to characterize the receiving end in the sidelink; After establishing and configuring the sidelink with the remote terminal, the method further includes: If the sidelink reconfiguration completion message sent by the remote terminal is received, data transmission of the sidelink is resumed based on the identifier of the sending end and the identifier of the receiving end. A device for switching sidelinks, the device is used for a first relay terminal, and the device includes: A determining module, configured to determine a second relay terminal when receiving a first measurement report reported by a remote terminal, where the second relay terminal is a relay that satisfies the requirement that the first measurement report corresponds to the first measurement event terminal; An acquisition module, configured to acquire a second sidelink configuration parameter from the second relay terminal, where the second sidelink configuration parameter is the sidelink configuration parameter between the remote terminal and the second relay terminal The configuration parameters applied by the link; A sending module, configured to send a sidelink reconfiguration message including the second sidelink configuration parameters to the remote terminal, so that the remote terminal satisfies a second measurement event when the second relay terminal , disconnecting the sidelink with the first relay terminal, and establishing and configuring a sidelink with the second relay terminal based on the second sidelink configuration parameter. A switching device for a sidelink link, the device is used for a remote terminal, and the device includes: A reporting module, configured to report a first measurement report to a first relay terminal when there is a second relay terminal that satisfies the first measurement event, and the remote terminal establishes a relationship with the first relay terminal. side link; A receiving module, configured to receive a sidelink reconfiguration message sent by the first relay terminal, where the sidelink reconfiguration message includes the second sidelink obtained from the second relay terminal road configuration parameters, the second side link configuration parameters are configuration parameters applied to the side link between the remote terminal and the second relay terminal; A disconnection module, configured to disconnect the sidelink with the first relay terminal when the second relay terminal satisfies a second measurement event; An establishing module, configured to establish and configure a sidelink with the second relay terminal based on the second sidelink configuration parameters. A sidelink switching device, the device is used for a second relay terminal, and the device includes: A determination module, configured to determine a second sidelink configuration parameter, where the second sidelink configuration parameter is a configuration parameter applied to the sidelink link between the remote terminal and the second relay terminal; A sending module, configured to send the second sidelink configuration parameters to a first relay terminal, where the first relay terminal establishes a sidelink with the remote terminal; An establishment module, configured to establish and configure a sidelink with the remote terminal when the sidelink between the remote terminal and the first relay terminal is disconnected. A terminal, the terminal comprising a processor and a memory; the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the sidewalk according to any one of claims 1 to 9 Link switching method, or, the sidelink switching method described in any one of claims 10 to 14, or, the sidelink switching method described in any one of claims 15 to 17. A computer-readable storage medium, the storage medium stores at least one instruction, and the at least one instruction is used to be executed by a processor to implement the sidelink link switching method according to any one of claims 1 to 9, Or, the sidelink switching method described in any one of claims 10 to 14, or, the sidelink switching method described in any one of claims 15 to 17. A computer program product, the computer program product comprising at least one instruction, the at least one instruction being loaded and executed by a processor to implement the sidelink switching method according to any one of claims 1 to 9, or, The sidelink switching method described in any one of claims 10 to 14, or the sidelink switching method described in any one of claims 15 to 17.

Images