Wireless communication method and apparatus, computer readable storage medium, and electronic device

Abstract

The present disclosure relates to the technical field of wireless communications, and provides a wireless communication method, a wireless communication apparatus, a computer readable storage medium, and an electronic device. The wireless communication method is applied to a remote user equipment, and comprises: in response to a first signaling message sent by a base station, sending a second signaling message to a relay user equipment, the second signaling message being used for indicating that the relay user equipment has entered a radio resource control (RRC) connected state. The present disclosure can improve the success rate of multi-path relay configuration.

Description

Wireless communication method and device, computer-readable storage medium, and electronic device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311735786.7, filed on December 15, 2023, entitled “Wireless Communication Methods and Apparatus, Computer-Readable Storage Medium and Electronic Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of wireless communication technology, and in particular to a wireless communication method, a wireless communication device, a computer-readable storage medium, and an electronic device. Background Art

[0004] In the field of wireless communication technology, when the link quality between a remote user equipment (remote UE) and a base station deteriorates, a suitable relay user equipment (relay UE) can be selected to ensure normal data transmission and maintain service continuity through UE-to-Network relay technology.

[0005] Currently, there may be a problem with multipath relay configuration failure, which affects service rate and user experience.

[0006] Summary of the Invention

[0007] According to a first aspect of the present disclosure, a wireless communication method is provided, which is applied to a remote user equipment. The wireless communication method includes: responding to a first signaling message sent by a base station, sending a second signaling message to a relay user equipment, wherein the second signaling message is used to instruct the relay user equipment to enter a radio resource control RRC connection state.

[0008] According to the second aspect of the present disclosure, a wireless communication device is provided, which is applied to a remote user equipment, and the wireless communication device is configured to: respond to a first signaling message sent by a base station, and send a second signaling message to a relay user equipment, wherein the second signaling message is used to instruct the relay user equipment to enter a radio resource control RRC connection state.

[0009] According to a third aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned wireless communication method is implemented.

[0010] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising: a processor; and a memory for storing executable instructions of the processor; the processor is configured to implement the above-mentioned wireless communication method by executing the executable instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 schematically shows a schematic diagram of multi-path relay.

[0012] FIG2 schematically shows a flow chart of a wireless communication method according to an embodiment of the present disclosure.

[0013] FIG3 shows a schematic diagram of interaction of a wireless communication process according to a first embodiment of the present disclosure.

[0014] FIG4 shows a schematic diagram of interaction of a wireless communication process according to a second embodiment of the present disclosure.

[0015] FIG5 shows a schematic diagram of interaction of a wireless communication process according to a third embodiment of the present disclosure.

[0016] FIG6 schematically shows a block diagram of an electronic device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0017] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present disclosure will be more comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or that other methods, components, devices, steps, etc. may be employed. In other cases, well-known technical solutions are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0018] In addition, the accompanying drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Identical reference numerals in the figures denote identical or similar parts, and thus repetitive descriptions thereof will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0019] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all steps. For example, some steps may be decomposed, while others may be combined or partially combined. Therefore, the actual order of execution may vary depending on the actual situation. In addition, all terms such as "first," "second," and "third" below are used for distinction purposes only and should not be construed as limitations of this disclosure.

[0020] In order to make the content of the present disclosure sufficiently clear, the terms involved in the embodiments of the present disclosure are explained below.

[0021] U2N relay (UE-to-Network Relay) means that remote user equipment can communicate with the base station through the relay user equipment.

[0022] A direct connection path refers to direct communication between remote user equipment and the base station through the Uu interface.

[0023] In an indirect connection path, a remote user equipment communicates with a base station through the PC5 interface between the remote user equipment and the relay user equipment and the Uu interface between the relay user equipment and the base station.

[0024] Multi-path relay refers to a remote user equipment communicating with a base station via multiple direct paths and / or indirect paths. The multiple paths can be direct paths and indirect paths, or multiple indirect paths.

[0025] The near-area network is composed of multiple remote user devices, relay user devices, and a cellular network. Remote user devices can access the cellular network through the relay user devices, thereby expanding the cellular network coverage and improving the cellular network performance through the near-area network.

[0026] 3GPP introduced NR sidelink (also known as direct link) technology in Release 16, primarily to enable V2X-related road safety services. Building on this, to further expand network and direct link coverage and improve power efficiency, 3GPP conducted research on NR sidelink relay technology (NR sidelink relay) in Release 17, introducing U2N Relay technology. This allows remote user equipment (UE) to communicate with the base station via a relay UE. When the link quality between the remote UE and the base station deteriorates, the remote UE can select an appropriate relay UE and ensure service continuity through U2N relay technology.

[0027] As shown in Figure 1, remote user equipment 11 communicates directly with base station 12 via the Uu interface, known as a direct path. Remote user equipment 11 communicates with base station 12 via the PC5 interface between it and relay user equipment 13, and the Uu interface between relay user equipment 13 and base station 12, known as an indirect path. In R17, remote user equipment 11 can communicate with base station 12 via either a direct or indirect path, but does not support simultaneous communication via both direct and indirect paths. This means that multi-path relay communication technology is not supported.

[0028] To further improve network throughput and reliability, 3GPP introduced multipath relay technology in the Sidelink Relay enhancement project of Release 18, supporting the following path management scenarios: A. The remote user device first operates on a direct path and then adds an indirect path; B. The remote user device first operates on an indirect path and then adds a direct path; C. The remote user device first operates in multipath mode and then deletes the indirect path; D. The remote user device first operates in multipath mode and then deletes the direct path; E. The remote user device operates in multipath mode, maintains the direct path unchanged, and changes the indirect path (i.e., reselects a new relay user device); F. The remote user device operates in multipath mode, maintains the indirect path unchanged, and changes the direct path to a different cell.

[0029] In the R17 version, when a remote user equipment conducts U2N relay communication through a relay user equipment, if the relay user equipment is in the idle or inactive state, it will first initiate an RRC connection establishment or RRC connection recovery and enter the connected state. The method for triggering the relay user equipment to enter the connected state is that when the relay user equipment receives an RRC message (a message carried by SRB0 or ​​SRB1) sent by the remote user equipment through a specific default configuration (SL-RLC0 or SL-RLC1), it triggers the RRC connection establishment process and enters the connected state. For the R17 U2N relay scenario, the remote user equipment has only a direct path or an indirect path at the same time. When switching from a direct path to an indirect path, the RRC reconfiguration complete message (a message carried by SRB1) can only be forwarded by the relay user equipment. Therefore, when the relay user equipment is in the idle or inactive state, the RRC connection establishment process of the relay user equipment can be triggered when the RRC reconfiguration complete message from the remote user equipment is received.

[0030] For the path management scenarios A and E in the above-mentioned multi-path relay scenario, the addition or change of relay user equipment is involved. When the newly added or changed relay user equipment is in an idle state or an inactive state, it is also necessary to trigger the relay user equipment to enter a connected state. In the multi-path relay scenario, the remote user equipment can still adopt the R17 method based on the configuration information of the base station, that is, send an RRC reconfiguration message through a non-direct path to trigger the relay user equipment to enter a connected state. At the same time, R18 also introduces a new triggering method. The remote user equipment can send a PC5-RRC message to the relay user equipment to instruct the relay user equipment to enter a connected state.

[0031] In an actual network, there may be both R17 and R18 relay user equipment. In this case, the remote user equipment can report candidate relay user equipment to the base station, and the base station selects the target relay user equipment and instructs the remote user equipment to add or change the non-direct path, thereby realizing the multi-path relay communication function. For candidate relay user equipment in the RRC connected state, the base station can identify its version information. Both R17 and R18 versions of relay user equipment can be used as target relays to provide multi-path relay communication functions for remote users. For candidate relay user equipment in the RRC inactive state, the base station can also obtain the version information of the relay user equipment through the saved user equipment context information, and according to the version of the selected target relay user equipment, it can instruct the remote user equipment to trigger the relay user equipment to enter the RRC connected state through reasonable base station configuration, thereby realizing the multi-path relay communication function.

[0032] However, for candidate relay user equipment in the RRC idle state, neither the remote user equipment nor the base station can identify the version information of the candidate relay, and thus cannot successfully trigger the target relay user equipment to enter the RRC connected state, and thus cannot implement the multi-path relay communication function. If the remote user equipment sends a PC5-RRC message to the target relay user equipment of the R17 version to trigger it to enter the connected state, since the R17 version relay user equipment cannot recognize the message, it will cause the multi-path relay configuration to fail, affecting the service rate and user experience, and affecting the performance of the near-field network.

[0033] Therefore, a new mechanism needs to be introduced to help remote user equipment and base stations identify idle state candidate relay user equipment of different versions, so as to select the appropriate triggering method to trigger the idle state target relay user equipment to enter the connected state, avoid the multi-path relay configuration failure caused by version mismatch, improve the success rate of multi-path relay configuration, ensure business needs, improve user experience, and improve near-area network performance.

[0034] In view of this, embodiments of the present disclosure provide a novel wireless communication method. This wireless communication method can be applied to a remote user device. That is, when no execution subject of a step is specified, the step is performed by the remote user device. The following wireless communication device can be configured in the remote user device.

[0035] It should be noted that the present disclosure does not limit the device types of the remote user equipment and the relay user equipment, and they may be, for example, smart phones, tablet computers, smart wearable devices, etc.

[0036] 2 , the wireless communication method according to the embodiment of the present disclosure includes step S20 .

[0037] In step S20, the remote user equipment responds to the first signaling message sent by the base station and sends a second signaling message to the relay user equipment, where the second signaling message is used to instruct the relay user equipment to enter a radio resource control (RRC) connected state.

[0038] According to some embodiments of the present disclosure, the first signaling message may be an RRC reconfiguration message. The first signaling message may include at least a sidelink indirect path addition or change indication. It is understood that the indirect path addition indication indicates that an indirect path addition process is to be executed, i.e., an indirect path creation process is to be created. The indirect path change indication indicates that an indirect path change process is to be executed, i.e., the indirect path is to be modified, thereby changing the relay user equipment.

[0039] In addition, the remote user equipment is not configured with a signaling radio bearer SRB1 on the indirect path, wherein the SRB1 is an available SRB1. That is, the first signaling message may further include information indicating that the remote user equipment is not configured with an SRB1 on the indirect path.

[0040] In some embodiments, the method of configuring an available SRB1 on a non-direct path includes at least one of the following: configuring an independent SRB1 on a non-direct path, configuring a primary radio link control RLC entity that supports separated SRB1 on a non-direct path and configuring the separated SRB1 on a non-direct path, and configuring an SRB1 that supports redundant transmission.

[0041] Correspondingly, the remote user equipment is not configured with the signaling radio bearer SRB1 on the non-direct path, including the remote user equipment not being configured with any one of the following SRB1s: configuring an independent SRB1 on the non-direct path, configuring the SRB1 that supports separation on the non-direct path and the main radio link control RLC entity of the separated SRB1 is configured on the non-direct path, and configuring the SRB1 that supports redundant transmission.

[0042] The second signaling message may be a PC5-RRC message. The PC5-RRC message includes at least indication information for triggering a relay user equipment in an RRC idle state to perform an RRC connection establishment procedure. Alternatively, the PC5-RRC message includes at least indication information for triggering a relay user equipment in an RRC inactive state to perform an RRC connection recovery procedure.

[0043] In some exemplary embodiments of the present disclosure, relevant indication information of the relay user equipment may be acquired in advance, and then the relay configuration may be completed according to the relevant indication information.

[0044] Specifically, the remote user equipment can obtain relevant indication information of the relay user equipment through the sidelink discovery process. In the embodiment of the present disclosure, the relevant indication information of the relay user equipment includes at least one of the relay user equipment version information and capability information, where the capability information at least includes information on whether the relay user equipment supports triggering it to enter the RRC connected state via a PC5-RRC message. Next, the remote user equipment feeds back the relevant indication information to the base station so that the base station can perform relevant configuration accordingly.

[0045] The process of the remote user equipment obtaining the relevant indication information may include: for sidelink discovery mode A (i.e., Model A), obtaining the relevant indication information added in the discovery message PROSE PC5 DISCOVERY. Or, for sidelink discovery mode B (i.e., Model B), obtaining the relevant indication information added in the discovery message PROSE PC5 DISCOVERY.

[0046] It is understandable that the above-mentioned discovery mode A and discovery mode B are different discovery modes in existing communication solutions. Specifically, the relevant indication information is added to the RRC container in the discovery message. The specific indication information is indicated by the RRC layer (bottom layer) and includes at least one of the following information: user equipment version information, user equipment capability information; the version information is the current user's specific device version or whether it is a higher version user equipment; the capability information at least includes whether the current user equipment supports the ability to trigger its entry into the RRC connected state through the PC5-RRC message.

[0047] Table 1 below shows an embodiment of the configuration of relevant information elements in the discovery message corresponding to discovery mode A.

[0048] Table 1

[0049] The following Table 2 shows an embodiment of the configuration of relevant information elements in the discovery message corresponding to discovery mode B.

[0050] Table 2

[0051] A new RRC information element is added to the RRC layer and included in the discovery message. The newly added RRC information element is used to indicate the version information of the relay user equipment (such as indicating that it is a high-version relay user equipment, where the high version in this disclosure may refer to a version higher than R17) or indicate capability information (such as whether it supports entering the RRC connected state triggered by the PC5-RRC message).

[0052] The cell structure of the embodiment of the present disclosure is given below:

[0053] It should be noted that when the remote user equipment obtains version information or capability information from the discovery message of the relay user equipment, it reports the information to the base station. When the remote user equipment does not obtain version information or capability information from the discovery message of the relay user equipment, it does not report the information.

[0054] In an exemplary embodiment of the present disclosure, the relay user equipment may be selected from candidate relay user equipments. The selected relay user equipment may also be referred to as a target relay user equipment. In the embodiments of the present disclosure, unless otherwise specified, the relay user equipment referred to is the selected target relay user equipment.

[0055] Similarly, the remote user equipment may obtain relevant indication information of one or more candidate relay user equipments through the sidelink discovery process, and feed back the relevant indication information of the candidate relay user equipments to the base station.

[0056] Specifically, the remote user equipment may include the relevant indication information of the relay user equipment in a third signaling message, and send the third signaling message to the base station. Thus, the base station obtains the relevant indication information of the relay user equipment.

[0057] According to some embodiments of the present disclosure, the third signaling message may be a measurement report message, which may include at least one of the following information: cell access related information of one or more candidate relay user equipment, sidelink layer 2 source ID, sidelink measurement results, and related indication information of the relay user equipment.

[0058] After the base station receives the third signaling message sent by the remote user equipment, the base station may select a relay user equipment from the one or more candidate relay user equipments. After determining the relay user equipment, the base station sends the first signaling message to the remote user equipment. Specifically, the base station may select a candidate relay user equipment whose version is higher than the target version (e.g., higher than R17) or supports triggering it to enter the RRC connected state through a PC5-RRC message as the relay user equipment.

[0059] In addition to obtaining the version information or capability information of the relay user equipment based on the third signaling message sent by the remote user equipment, if the relay user equipment is in the RRC connected state, the base station can obtain the version information or capability information of the relay user equipment based on the information reported by the relay user equipment; if the relay user equipment is in the RRC inactive state, the base station obtains the version information or capability information of the relay user equipment through the stored relay user equipment context information.

[0060] After acquiring the version information or capability information of the relay user equipment, the base station may configure the configuration information of SRB1 for the remote user equipment according to the version information or capability information of the relay user equipment.

[0061] In addition, when the base station cannot obtain the version information or capability information of the relay user equipment, the base station can configure SRB1 on the indirect path for the remote user equipment to instruct the remote user equipment to send an RRC reconfiguration completion message via the indirect path.

[0062] The following describes the wireless communication interaction process of the first embodiment of the present disclosure with reference to FIG3. In the first embodiment of the present disclosure, the remote user equipment reports the version information or capability information of the relay user equipment to the base station. The specific process includes:

[0063] In step S302, the remote user equipment may perform single-path transmission of uplink and downlink data with the base station.

[0064] In step S304, the base station sends an RRC reconfiguration message to the remote user equipment, where the RRC reconfiguration message includes measurement configuration.

[0065] In step S306, the remote user equipment performs measurements according to the measurement configuration. It will be understood that the number of candidate relay user equipment shown in Figure 3 is merely exemplary. In addition to candidate relay user equipment 1 and candidate relay user equipment 2, candidate relay user equipment 3, candidate relay user equipment 4, candidate relay user equipment 5, etc. may also be included. Specifically, for candidate relay user equipment that has established a PC5 connection with the remote user equipment, the remote user equipment directly measures the sidelink communication signal quality. For candidate relay user equipment that has not established a PC5 connection with the remote user equipment, the remote user equipment may perform measurements through the sidelink discovery process. During the sidelink discovery process, the remote user equipment may obtain version information or capability information of the candidate relay user equipment and save the relevant indication information. For example, if candidate relay user equipment 1 is a high-version user equipment (i.e., a user equipment with a version higher than R17), the corresponding sidelink discovery message includes the version information or capability information. If candidate relay user equipment 2 is a low-version user equipment (e.g., R17), the corresponding sidelink discovery message may not include the version information or capability information.

[0066] In step S308, the remote user equipment sends a measurement report message to the base station, including the measurement results of each candidate relay user equipment. For each candidate relay user equipment, the measurement result may include the candidate relay user equipment's cell access information, the sidelink layer 2 source ID, the sidelink measurement result, and optionally, relevant indication information of the relay user equipment. In the scenario shown in Figure 3, which includes candidate relay user equipment 1 and candidate relay user equipment 2, as described above, only the relevant indication information of candidate relay user equipment 1 is included.

[0067] In step S310, the base station selects the target relay user equipment based on the measurement report, and interacts with the remote user equipment and the target relay user equipment to complete the multi-path relay configuration process, for example, the process of adding or changing the non-direct path. Specifically, when the selected target relay user equipment is in an RRC inactive state or an idle state, the base station can reasonably configure the SRB1 of the non-direct path based on the version information or capability information of the candidate relay user equipment reported by the remote user equipment, thereby instructing the remote user equipment to use a corresponding method to trigger the candidate relay user equipment to enter the RRC connection state. For example, for a target relay user equipment with a high version or that supports the PC5-RRC method to trigger the entry into the RRC connection state, the base station may not configure the available SRB1 on the non-direct path. The remote user equipment sends a PC5-RRC message to the target relay user equipment based on the existing SRB1 configuration, thereby triggering the idle target relay user equipment to enter the RRC connection state. For a target relay user equipment with an earlier version or that does not support the PC5-RRC method to trigger the entry into the RRC connected state, the base station can configure an available SRB1 on an indirect path. The remote user equipment, based on the SRB1 configuration, sends an RRC reconfiguration complete message to the base station via the indirect path, thereby triggering the target relay user equipment to enter the RRC connected state. As shown in FIG3 , as described above, candidate relay user equipment 1 may be the selected target relay user equipment.

[0068] In step S312, with the help of the target relay user equipment, the remote user equipment and the base station can perform uplink and downlink multipath transmission.

[0069] In an embodiment where version information or capability information indicating a relay user equipment is added to a message, the remote user equipment obtains the version information or capability information of a candidate relay user equipment and reports it to the base station via a measurement report message. The base station selects a target relay user equipment and properly configures SRB1 based on the version information or capability information of the target relay user equipment, thereby ensuring that the remote user equipment can trigger the target relay user equipment in an idle or inactive state to enter an RRC connected state, completing the multipath relay configuration process. This effectively solves the problem of multipath relay configuration failure while ensuring flexible configuration of the base station, suitable for future network evolution and deployment.

[0070] The following describes the interactive process of wireless communication in the second embodiment of the present disclosure with reference to FIG4. In the second embodiment of the present disclosure, the base station cannot identify the version information or capability information of the selected relay user equipment. The base station configures the remote user equipment with an available SRB1 on the indirect path through an RRC reconfiguration message, ensuring that the remote user equipment sends an RRC reconfiguration completion message through the indirect path, thereby successfully triggering the target relay user equipment to enter the connected state. The specific process includes:

[0071] In step S402, the remote user equipment may perform single-path transmission of uplink and downlink data with the base station.

[0072] In step S404, the remote user equipment may perform measurement and report the measurement according to the network configuration.

[0073] In step S406, the base station adds a non-direct path and selects a relay user equipment based on the measurement results reported by the remote user equipment. Specifically, the base station sends an RRC reconfiguration message to the remote user equipment, which includes at least one or more of the following information: the local ID of the remote user equipment, the L2 ID of the relay user equipment, and SRAP-related configurations. If the base station cannot identify the version information (e.g., whether it is an R18 user equipment) or capability information (e.g., whether it supports the ability to enter the RRC connected state based on the PC5-RRC message), the SRAP-related configuration includes available SRB1 configuration information.

[0074] In step S408, the base station may send an RRC reconfiguration message to the remote user equipment.

[0075] In step S410, the remote user equipment establishes a PC5 connection with the relay user equipment.

[0076] In step S412, when the relay user equipment receives an RRC message sent by the remote user equipment using a specific default configuration (SL-RLC1), if the relay user equipment is not in the RRC connected state at this time, it performs relevant operations to enter the RRC connected state. Specifically, if the relay user equipment is in the idle state at this time, it performs the RRC connection establishment process. If the relay user equipment is in the inactive state at this time, it performs the RRC recovery process.

[0077] In step S414, the base station may send RRC reconfiguration information to the relay user equipment. The RRC reconfiguration information is used to instruct the relay user equipment to add the remote user equipment. The RRC reconfiguration information at least includes the local ID and L2 ID of the remote user equipment, SRAP-related configuration, etc.

[0078] In step S416, the relay user equipment may send the RRC reconfiguration completion message sent by the remote user equipment to the base station according to the configuration of the base station.

[0079] In step S418, with the help of the relay user equipment, the remote user equipment and the base station can perform uplink and downlink multipath transmission.

[0080] The following describes the wireless communication interaction process of the third embodiment of the present disclosure with reference to FIG5. Compared with the above-mentioned second embodiment, the third embodiment is a solution for changing the non-direct connection path, that is, reselecting a new target relay user equipment. The specific process includes:

[0081] In step S502, with the help of the source relay user equipment, the remote user equipment can perform multi-path transmission of uplink and downlink data with the base station.

[0082] In step S504, the remote user equipment may perform measurement and report the measurement according to the network configuration.

[0083] In step S506, the base station changes the indirect path based on the measurement results reported by the remote user equipment and selects a new target relay user equipment. Specifically, the base station sends an RRC reconfiguration message to the remote user equipment, which includes at least one or more of the following information: the local ID of the remote user equipment (if an update is required), the L2 ID of the target relay user equipment, and SRAP-related configurations. When the base station cannot identify the version information (e.g., whether it is an R18 version user equipment) or capability information (e.g., whether it supports the ability to enter the RRC connected state based on the PC5-RRC message triggering) of the selected target relay user equipment, the SRAP-related configuration includes available SRB1 configuration information.

[0084] In step S508, the base station may send an RRC reconfiguration message to the remote user equipment.

[0085] In step S510, the remote user equipment establishes a PC5 connection with the target relay user equipment.

[0086] In step S512, when the target relay user equipment receives an RRC message sent by the remote user equipment using a specific default configuration (SL-RLC1), if the target relay user equipment is not in the RRC connected state at this time, the target relay user equipment performs relevant operations to enter the RRC connected state. Specifically, if the target relay user equipment is in the idle state at this time, the target relay user equipment performs the RRC connection establishment process. If the target relay user equipment is in the inactive state at this time, the target relay user equipment performs the RRC recovery process.

[0087] In step S514, the base station may send RRC reconfiguration information to the target relay user equipment. The RRC reconfiguration information is used to instruct the target relay user equipment to add the remote user equipment. The RRC reconfiguration information at least includes the local ID and L2 ID of the remote user equipment, SRAP-related configuration, etc.

[0088] In step S516, the target relay user equipment may send the RRC reconfiguration completion message sent by the remote user equipment to the base station according to the base station configuration.

[0089] In step S518, the base station sends an RRC reconfiguration message to the source relay user equipment. The RRC reconfiguration message in this step is used to instruct the source relay user equipment to release the remote user equipment.

[0090] In step S520, the PC5 connection between the remote user equipment and the source relay user equipment is released.

[0091] In step S522, with the help of the new target relay user equipment, the remote user equipment can perform multi-path transmission of uplink and downlink data with the base station.

[0092] In an embodiment where the base station cannot identify the version information or capability information of a selected relay user equipment, the base station configures an available SRB1 for the indirect path, allowing the remote user equipment to send an RRC reconfiguration complete message via the indirect path. This ensures that the target relay user equipment in idle or inactive state can be triggered to enter the RRC connected state, completing the multipath relay configuration process. These solutions can also, to a certain extent, resolve the issue of multipath relay configuration failure.

[0093] It should be noted that although the steps of the method of the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all steps must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0094] Furthermore, an embodiment of the present disclosure also provides a wireless communication device, which is applied to a remote user equipment, and the wireless communication device is configured to: respond to a first signaling message sent by a base station, and send a second signaling message to a relay user equipment, wherein the second signaling message is used to instruct the relay user equipment to enter a radio resource control RRC connection state.

[0095] According to an exemplary embodiment of the present disclosure, the first signaling message is an RRC reconfiguration message, the first signaling message includes at least an indication of adding or changing a sidelink non-direct path, and the remote user equipment is not configured with a signaling radio bearer SRB1 on the non-direct path; the second signaling message is a PC5-RRC message, the PC5-RRC message includes at least indication information for triggering a relay user equipment in an RRC idle state to perform an RRC connection establishment process, or triggering a relay user equipment in an RRC inactive state to perform an RRC connection recovery process.

[0096] According to an exemplary embodiment of the present disclosure, the remote user equipment is not configured with a signaling radio bearer SRB1 on a non-direct path, including that the remote user equipment is not configured with any one of the following SRB1s: configuring an independent SRB1 on a non-direct path, configuring a SRB1 that supports separation on a non-direct path and the main radio link control RLC entity of the separated SRB1 is configured on a non-direct path, and configuring an SRB1 that supports redundant transmission.

[0097] According to an exemplary embodiment of the present disclosure, the wireless communication device is also configured to: obtain relevant indication information of the relay user equipment from the discovery message of the sidelink discovery process, and the relevant indication information includes at least one of the version information and capability information of the relay user equipment.

[0098] According to an exemplary embodiment of the present disclosure, obtaining relevant indication information of the relay user equipment from the discovery message of the sidelink discovery process includes: for sidelink discovery mode A, obtaining relevant indication information added in the discovery message PROSE PC5 DISCOVERY; or for sidelink discovery mode B, obtaining relevant indication information added in the discovery message PROSE PC5 DISCOVERY.

[0099] According to an exemplary embodiment of the present disclosure, the wireless communication device is further configured as follows: the relevant indication information is added to the RRC container in the discovery message, and the relevant indication information is indicated by the RRC layer, including at least one of the following information: version information of the user equipment, capability information of the user equipment; the version information is the specific device version of the current user or whether it is a high-version user equipment; the capability information includes at least whether the current user equipment supports the ability to trigger it to enter the RRC connection state through a PC5-RRC message.

[0100] According to an exemplary embodiment of the present disclosure, the discovery message includes an RRC information element, and the RRC information element is used to indicate one of version information and capability information of the relay user equipment.

[0101] According to an exemplary embodiment of the present disclosure, the wireless communication device is further configured to: obtain relevant indication information of one or more candidate relay user equipments through a sidelink discovery process; and feed back relevant indication information of one or more candidate relay user equipments to the base station.

[0102] According to an exemplary embodiment of the present disclosure, feeding back the relevant indication information of the relay user equipment to the base station includes: including the relevant indication information of the relay user equipment in a third signaling message; and sending the third signaling message to the base station.

[0103] According to an exemplary embodiment of the present disclosure, the third signaling message is a measurement report message, which includes at least one of the following information: cell access related information of one or more candidate relay user equipment, sidelink layer 2 source ID, sidelink measurement results, and related indication information of the relay user equipment.

[0104] According to an exemplary embodiment of the present disclosure, the wireless communication device is further configured as follows: the base station receives a third signaling message sent by a remote user equipment; the base station selects a relay user equipment from one or more candidate relay user equipments; and the base station sends a first signaling message to the remote user equipment.

[0105] According to an exemplary embodiment of the present disclosure, the wireless communication device is further configured as follows: the base station obtains version information or capability information of the relay user equipment; the base station configures SRB1 configuration information for the remote user equipment according to the version information or capability information of the relay user equipment.

[0106] According to an exemplary embodiment of the present disclosure, the base station obtains the version information or capability information of the relay user equipment including: if the relay user equipment is in an RRC connected state, the base station obtains the version information or capability information of the relay user equipment based on the information reported by the relay user equipment; if the relay user equipment is in an RRC inactive state, the base station obtains the version information or capability information of the relay user equipment through the stored relay user equipment context information; or the base station obtains the version information or capability information of the relay user equipment based on a third signaling message sent by the remote user equipment.

[0107] According to an exemplary embodiment of the present disclosure, the base station selects a relay user equipment from one or more candidate relay user equipments, including: the base station selects a candidate relay user equipment whose version is higher than the target version or supports triggering it to enter the RRC connection state through a PC5-RRC message as the relay user equipment.

[0108] According to an exemplary embodiment of the present disclosure, the wireless communication device is also configured to: when the base station cannot obtain the version information or capability information of the relay user equipment, the base station configures SRB1 on the non-direct path for the remote user equipment to instruct the remote user equipment to send an RRC reconfiguration completion message through the non-direct path.

[0109] Since the execution details of the wireless communication device of the embodiment of the present disclosure are the same as those in the above method embodiment, they are not repeated here.

[0110] In exemplary embodiments of the present disclosure, a computer-readable storage medium is also provided, on which is stored a program product capable of implementing the aforementioned methods of this specification. In some possible implementations, various aspects of the present disclosure may also be implemented in the form of a program product comprising program code. When the program product is executed on a terminal device, the program code is configured to cause the terminal device to execute the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of the present disclosure.

[0111] The program product for implementing the above-mentioned method according to an embodiment of the present disclosure may be a portable compact disc read-only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0112] The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical disk, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0113] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0114] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0115] The program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, and the like, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a stand-alone software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0116] In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided. The above remote user equipment and / or relay user equipment may be configured as the following electronic devices.

[0117] Those skilled in the art will appreciate that various aspects of the present disclosure may be implemented as systems, methods, or program products. Therefore, various aspects of the present disclosure may be implemented in the following forms: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which may be collectively referred to herein as "circuits," "modules," or "systems."

[0118] The electronic device 600 according to this embodiment of the present disclosure is described below with reference to Figure 6. The electronic device 600 shown in Figure 6 is merely an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0119] As shown in FIG6 , electronic device 600 is implemented as a general-purpose computing device. Components of electronic device 600 may include, but are not limited to, the aforementioned at least one processing unit 610, the aforementioned at least one storage unit 620, a bus 630 connecting various system components (including storage unit 620 and processing unit 610), and a display unit 640.

[0120] The storage unit stores program code, which can be executed by the processing unit 610, so that the processing unit 610 performs the steps according to various exemplary embodiments of the present disclosure described in the "Exemplary Methods" section above. For example, the processing unit 610 can perform various steps of the wireless communication method according to an embodiment of the present disclosure.

[0121] The storage unit 620 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 6201 and / or a cache memory unit 6202 , and may further include a read-only memory unit (ROM) 6203 .

[0122] The storage unit 620 may also include a program / utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0123] Bus 630 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0124] The electronic device 600 can also communicate with one or more external devices 700 (e.g., a keyboard, a pointing device, a Bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 600, and / or any device that enables the electronic device 600 to communicate with one or more other computing devices (e.g., a router, a modem, etc.). Such communication can occur via an input / output (I / O) interface 650. Furthermore, the electronic device 600 can communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 660. As shown, the network adapter 660 communicates with other modules of the electronic device 600 via a bus 630. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device 600, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0125] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

[0126] Furthermore, the figures above are merely illustrative of the processes included in the methods according to exemplary embodiments of the present disclosure and are not intended to be limiting. It is readily understood that the processes illustrated in the figures above do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0127] It should be noted that although several modules or units of the device for action execution are mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be concretized in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0128] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing what is disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the claims.

[0129] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A wireless communication method, applied to a remote user equipment, the wireless communication method comprising: In response to a first signaling message sent by the base station, a second signaling message is sent to the relay user equipment, where the second signaling message is used to instruct the relay user equipment to enter a radio resource control RRC connected state.

2. The wireless communication method according to claim 1, wherein: The first signaling message is an RRC reconfiguration message, the first signaling message at least includes a sidelink non-direct path addition or change indication, and the remote user equipment is not configured with a signaling radio bearer SRB1 on the non-direct path; The second signaling message is a PC5-RRC message, and the PC5-RRC message includes at least indication information for triggering a relay user equipment in an RRC idle state to perform an RRC connection establishment process, or triggering a relay user equipment in an RRC inactive state to perform an RRC connection recovery process.

3. The wireless communication method according to claim 2, wherein: The remote user equipment is not configured with a signaling radio bearer SRB1 on a non-direct path, including that the remote user equipment is not configured with any one of the following SRB1s: an independent SRB1 is configured on a non-direct path, a SRB1 supporting separation is configured on a non-direct path and the main radio link control RLC entity of the separated SRB1 is configured on the non-direct path, and an SRB1 supporting redundant transmission is configured.

4. The wireless communication method according to claim 1, wherein: The wireless communication method further comprises: Acquire relevant indication information of the relay user equipment from a discovery message of a sidelink discovery process, where the relevant indication information includes at least one of version information and capability information of the relay user equipment; Feedback relevant indication information of the relay user equipment to the base station.

5. The wireless communication method according to claim 4, wherein: Acquiring relevant indication information of the relay user equipment from a discovery message of a sidelink discovery process includes: For sidelink discovery mode A, obtaining the relevant indication information added in the discovery message PROSE PC5 DISCOVERY; or For the sidelink discovery mode B, the relevant indication information added in the discovery message PROSE PC5 DISCOVERY is obtained.

6. The wireless communication method according to claim 4, wherein: The relevant indication information is added to the RRC container in the discovery message, and the relevant indication information is indicated by the RRC layer, including at least one of the following information: version information of the user equipment, capability information of the user equipment; the version information is the specific device version of the current user or whether it is a high-version user equipment; the capability information at least includes whether the current user equipment supports the ability to trigger its entry into the RRC connection state through a PC5-RRC message.

7. The wireless communication method according to claim 6, wherein: The discovery message includes an RRC information element, and the RRC information element is used to indicate one of version information and capability information of the relay user equipment.

8. The wireless communication method according to claim 4, wherein: The wireless communication method further comprises: Obtain relevant indication information of one or more candidate relay user equipments through a sidelink discovery process; Feedback relevant indication information of the one or more candidate relay user equipments to the base station.

9. The wireless communication method according to claim 4, wherein: Feedback of relevant indication information of the relay user equipment to the base station includes: Including the relevant indication information of the relay user equipment in a third signaling message; The third signaling message is sent to the base station.

10. The wireless communication method according to claim 9, wherein: The third signaling message is a measurement report message, and the measurement report message includes at least one of the following information: cell access related information of one or more candidate relay user equipments, a sidelink layer 2 source ID, a sidelink measurement result, and related indication information of the relay user equipment.

11. The wireless communication method according to any one of claims 1 to 10, wherein: The wireless communication method further comprises: The base station receives a third signaling message sent by the remote user equipment; The base station selects the relay user equipment from one or more candidate relay user equipments; The base station sends a first signaling message to the remote user equipment.

12. The wireless communication method according to claim 11, wherein: The wireless communication method further comprises: The base station obtains version information or capability information of the relay user equipment; The base station configures the configuration information of SRB1 for the remote user equipment according to the version information or capability information of the relay user equipment.

13. The wireless communication method according to claim 12, wherein: The base station acquiring the version information or capability information of the relay user equipment includes: If the relay user equipment is in an RRC connected state, the base station acquires version information or capability information of the relay user equipment according to information reported by the relay user equipment; If the relay user equipment is in an RRC inactive state, the base station acquires version information or capability information of the relay user equipment through stored context information of the relay user equipment; or The base station obtains the version information or capability information of the relay user equipment according to the third signaling message sent by the remote user equipment.

14. The wireless communication method according to claim 11, wherein: The base station selecting the relay user equipment from one or more candidate relay user equipments includes: The base station selects a candidate relay user equipment whose version is higher than the target version or supports being triggered by a PC5-RRC message to enter an RRC connected state as the relay user equipment.

15. The wireless communication method according to claim 1, wherein: The wireless communication method further comprises: When the base station cannot obtain the version information or capability information of the relay user equipment, the base station configures SRB1 on the indirect path for the remote user equipment to instruct the remote user equipment to send an RRC reconfiguration completion message through the indirect path.

16. A wireless communication device, applied to a remote user equipment, the wireless communication device being configured to: respond to a first signaling message sent by a base station, send a second signaling message to a relay user equipment, the second signaling message being used to instruct the relay user equipment to enter a radio resource control RRC connection state.

17. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the wireless communication method according to any one of claims 1 to 15.

18. An electronic device, comprising: processor; as well as A memory, configured to store executable instructions of the processor; The processor is configured to implement the wireless communication method according to any one of claims 1 to 15 by executing the executable instructions.

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