Wireless link failure processing method, relay communication system and related equipment

Abstract

The present disclosure proposes a method for processing a wireless link failure, a relay communication system and related equipment, and relates to the field of wireless communications. A remote user device detects that a wireless link failure occurs in a direct connection path between the remote user device and a base station of a current service cell, and sends a wireless link failure indication to the base station through a relay user device, indicating that a wireless link failure occurs in a direct connection path between the remote user device and the base station of the current service cell; the remote user device receives indication information related to wireless link failure processing returned by the base station through the relay user device; the remote user device performs corresponding processing operations according to the indication information related to wireless link failure processing. When a wireless link failure occurs in a direct connection path, the wireless link failure is reported based on a non-direct connection path and a rapid recovery is performed, thereby reducing unnecessary RRC reconstruction processes, reducing service interruption time, and improving user experience.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communications, and in particular to a wireless link failure processing method, a relay communication system, and related remote user equipment and base stations. Background Art

[0002] Sidelink (direct link) technology defines a direct connection protocol between terminals, allowing terminals to communicate directly with each other, and can be applied to V2X (Vehicle-to-Everything) communication scenarios. 3GPP introduced NR (New Radio) Sidelink technology in the R16 version. On this basis, in order to further expand the coverage of the network and direct links and improve power efficiency, 3GPP conducted research on relay technology (NR Sidelink Relay) based on NR direct links in the R17 version, and introduced UE-to-Network (U2N, user equipment and network) relay technology. The remote UE (User Equipment) can communicate with the base station through the relay UE. When the link quality between the remote UE and the base station deteriorates, the remote UE can select a suitable relay UE to ensure service continuity through UE-to-Network relay technology. Such as Figure 1 As shown in (a), the remote UE and the base station communicate directly through the Uu interface, which is called a direct path; the remote UE communicates with the network side through the PC5 interface between it and the relay UE and the Uu interface between the relay UE and the base station, which is called an indirect path. In the R17 version, the UE can communicate with the network side through a direct path or an indirect path, but it does not support the UE to communicate through both a direct path and an indirect path at the same time, that is, it does not support multi-path relay communication technology.

[0003] UE in connected state needs to monitor the radio link. When a radio link failure (RLF) occurs in the serving cell, the UE needs to reselect a suitable cell and trigger the radio resource control (RRC) reconstruction process. After the RRC reconstruction is successful, the UE can re-access the network and resume service transmission. The RRC reconstruction process will cause at least tens of milliseconds of service interruption, affecting the user experience. In the multi-path relay scenario, such as Figure 1 As shown in (b), when a wireless link failure occurs on a direct path, even if communication can still be performed on an indirect path, the UE will trigger the RRC reestablishment process, causing unnecessary service interruption. Summary of the invention

[0004] In the disclosed embodiment, when a wireless link failure occurs on a direct path, the wireless link failure is reported based on a non-direct path and a rapid recovery is performed, thereby reducing unnecessary RRC reconstruction processes, reducing service interruption time, and improving user experience. The embodiment can be applied to multi-path relay communication scenarios.

[0005] Some embodiments of the present disclosure provide a method for handling a wireless link failure, including:

[0006] The remote user equipment detects that a radio link failure occurs in a direct connection path between the remote user equipment and a base station of a current serving cell, and sends a radio link failure indication to the base station through a relay user equipment, indicating that a radio link failure occurs in a direct connection path between the remote user equipment and the base station of the current serving cell;

[0007] The remote user equipment receives the indication information related to the radio link failure processing returned by the base station through the relay user equipment;

[0008] The remote user equipment performs corresponding processing operations according to the indication information related to the wireless link failure processing.

[0009] In some embodiments, the content of the radio link failure indication includes: a type indication of the radio link failure and a currently available measurement result.

[0010] In some embodiments, the currently available measurement results include: one or more of the available measurement results of measurement objects related to the current serving cell, the available measurement results of measurement objects related to the neighboring cell, and the available measurement results of measurement objects related to the direct link between the remote user equipment and the relay user equipment.

[0011] In some embodiments, the remote user equipment performs corresponding processing operations according to the indication information related to the radio link failure processing, including:

[0012] The remote user equipment switches to the target cell according to the switching related configuration information of the indicated target cell; or,

[0013] The remote user equipment switches to the indirect path according to the instruction to switch to the indirect path; or,

[0014] The remote user equipment releases the RRC connection according to the indicated radio resource control RRC release message.

[0015] Among them, the direct connection path refers to the communication path between the remote user equipment and the base station through the Uu interface between it and the base station, and the indirect connection path refers to the communication path between the remote user equipment and the base station through the PC5 interface between it and the relay user equipment and the Uu interface between the relay user equipment and the base station.

[0016] In some embodiments, it also includes: the remote user equipment starts a timer while sending a wireless link failure indication to the base station through a relay user equipment, and stops the timer when receiving indication information related to the wireless link failure processing returned by the base station. When the timer times out, if the indication information related to the wireless link failure processing returned by the base station has not been received, the RRC reconstruction process is triggered.

[0017] In some embodiments, when the directly connected base station of the remote user equipment is the first base station and the directly connected base station of the relay user equipment is the second base station:

[0018] The remote user equipment sends the radio link failure indication to the relay user equipment through the first RRC signaling, the relay user equipment sends the first RRC signaling to the second base station, the second base station encapsulates the first RRC signaling in the first Xn signaling, and sends the first Xn signaling to the first base station;

[0019] The first base station sends the indication information related to the radio link failure processing to the second base station through the second Xn signaling, and the second base station sends the indication information related to the radio link failure processing encapsulated in the second Xn signaling to the relay user equipment through the second RRC signaling, and the relay user equipment sends the second RRC signaling to the remote user equipment.

[0020] In some embodiments, when the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are a third base station:

[0021] The remote user equipment sends the radio link failure indication to the relay user equipment through the first RRC signaling, and the relay user equipment sends the first RRC signaling to the third base station;

[0022] The third base station sends indication information related to the radio link failure processing to the relay user equipment through a second RRC signaling, and the relay user equipment sends the second RRC signaling to the remote user equipment.

[0023] Some embodiments of the present disclosure provide a method for handling a wireless link failure, including:

[0024] receiving a radio link failure indication sent by a remote user equipment through a relay user equipment, which is used to indicate that a radio link failure occurs in a direct connection path between the remote user equipment and a base station of a current serving cell;

[0025] The indication information related to the radio link failure processing is sent to the remote user equipment through the relay user equipment to instruct the remote user equipment to perform corresponding processing operations.

[0026] In some embodiments, the content of the radio link failure indication includes: a type indication of the radio link failure, a currently available measurement result;

[0027] Sending the indication information related to the radio link failure processing to the remote user equipment through the relay user equipment includes:

[0028] According to the currently available measurement result, if there is a target cell that meets the switching condition, sending an indication message of switching to the target cell to the remote user equipment through the relay user equipment, and carrying the switching related configuration information; or,

[0029] According to the currently available measurement result, if there is an available indirect path, sending indication information of switching to the indirect path to the remote user equipment through the relay user equipment;

[0030] According to the currently available measurement result, if there is no target cell that meets the switching condition and no available indirect path, an RRC release message is sent to the remote user equipment through the relay user equipment.

[0031] In some embodiments, when the directly connected base station of the remote user equipment is the first base station and the directly connected base station of the relay user equipment is the second base station:

[0032] The second base station receives the first RRC signaling carrying the radio link failure indication sent by the remote user equipment through the relay user equipment, encapsulates the first RRC signaling in a first Xn signaling, and sends the first Xn signaling to the first base station;

[0033] The first base station sends the indication information related to the radio link failure processing to the second base station through the second Xn signaling, and the second base station sends the indication information related to the radio link failure processing encapsulated in the second Xn signaling to the relay user equipment through the second RRC signaling, so that the relay user equipment sends the second RRC signaling to the remote user equipment.

[0034] In some embodiments, when the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are a third base station:

[0035] Receiving, by the third base station, a first RRC signaling carrying the radio link failure indication and sent by the remote user equipment through the relay user equipment;

[0036] The third base station sends the second RRC signaling carrying the indication information related to the radio link failure processing to the remote user equipment through the relay user equipment.

[0037] Some embodiments of the present disclosure provide a remote user equipment, including:

[0038] a sending module configured to detect that a radio link failure occurs in a direct connection path between a remote user equipment and a base station of a current serving cell, and to send a radio link failure indication to the base station through a relay user equipment, indicating that a radio link failure occurs in a direct connection path between the remote user equipment and the base station of the current serving cell;

[0039] A receiving module, configured to receive, through the relay user equipment, indication information related to radio link failure processing returned by the base station;

[0040] The execution module is configured to execute corresponding processing operations according to the indication information related to the wireless link failure processing.

[0041] Some embodiments of the present disclosure provide a remote user equipment, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute a wireless link failure processing method based on instructions stored in the memory.

[0042] Some embodiments of the present disclosure provide a base station, including:

[0043] A receiving module, configured to receive a radio link failure indication sent by a remote user equipment through a relay user equipment, which is used to indicate that a radio link failure occurs in a direct connection path between the remote user equipment and a base station of a current serving cell;

[0044] The sending module is configured to send the indication information related to the wireless link failure processing to the remote user equipment through the relay user equipment, so as to instruct the remote user equipment to perform corresponding processing operations.

[0045] Some embodiments of the present disclosure provide a base station, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute a wireless link failure processing method based on instructions stored in the memory.

[0046] In some embodiments, when the directly connected base station of the remote user equipment is a first base station and the directly connected base station of the relay user equipment is a second base station, the base station includes the first base station and the second base station; when the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are a third base station, the base station is a third base station.

[0047] Some embodiments of the present disclosure provide a relay communication system, including: a remote user equipment; a relay user equipment; and a base station.

[0048] Some embodiments of the present disclosure provide a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the steps of a method for handling a wireless link failure when the program is executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. The present disclosure can be more clearly understood according to the following detailed description with reference to the drawings.

[0050] Obviously, the drawings described below are only some embodiments of the present disclosure, and a person skilled in the art can obtain other drawings based on these drawings without creative work.

[0051] Figure 1 (a) and Figure 1 (b) is a schematic diagram showing a multi-path relay scenario with the same base station.

[0052] Figure 2 A flowchart of a method for handling wireless link failure based on a non-direct path implementation according to some embodiments of the present disclosure is shown.

[0053] Figure 3 A schematic diagram of a wireless link failure processing flow in a same-base station multi-path relay scenario according to some embodiments of the present disclosure is shown.

[0054] Figure 4 A schematic diagram showing a multi-path relay scenario between base stations.

[0055] Figure 5 A schematic diagram of the wireless link failure processing flow in a multi-path relay scenario between base stations in some embodiments of the present disclosure is shown.

[0056] Figure 6 A schematic diagram showing the structure of a remote user device according to some embodiments of the present disclosure is shown.

[0057] Figure 7 A schematic diagram showing the structure of a remote user device according to some embodiments of the present disclosure is shown.

[0058] Figure 8 A schematic diagram of the structure of a base station according to some embodiments of the present disclosure is shown.

[0059] Fig. 9 A schematic diagram of the structure of a base station according to some embodiments of the present disclosure is shown.

[0060] Fig.10 A schematic diagram showing a multi-path relay communication system according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.

[0062] Unless otherwise specified, descriptions such as “first” and “second” in the present disclosure are used to distinguish different objects and are not used to indicate meanings such as size or time sequence.

[0063] In the multi-path relay communication scenario, the UE supports communication through both direct and indirect paths. The direct path refers to the communication path between the remote user equipment and the base station through the Uu interface between the remote user equipment and the base station, and the indirect path refers to the communication path between the remote user equipment and the 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.

[0064] Figure 2 A flowchart of a method for handling wireless link failure based on a non-direct path implementation according to some embodiments of the present disclosure is shown.

[0065] like Figure 2 As shown, the wireless link failure processing method based on the non-direct path of this embodiment includes:

[0066] In step 210, the remote user equipment detects that a wireless link failure occurs in the direct connection path between the remote user equipment and the base station of the current serving cell, and sends a wireless link failure indication to the base station through the relay user equipment to indicate that a wireless link failure occurs in the direct connection path between the remote user equipment and the base station of the current serving cell.

[0067] The remote UE monitors the radio link of the current serving cell. When a radio link failure occurs on the direct path, the remote UE suspends the transmission of all RBs (Radio Bearers) on the direct path except SRB0 (Signaling Radio Bearers 0, signaling radio bearer No. 0, used to transmit RRC messages), and prepares to report RRC signaling carrying a radio link failure indication to the base station. The radio link failure indication is used to indicate that a radio link failure occurs on the direct path between the remote user equipment and the base station of the current serving cell. The content of the radio link failure indication includes, for example, an indication of the type of radio link failure and all currently available measurement results. The indication of the type of radio link failure includes, for example, at least one of the following: T310 timer timeout, random access problem, exceeding the maximum number of retransmissions at the RLC (Radio Link Control) layer, T312 timer timeout, LBT (listen before talk) failure, beam recovery failure, etc. The available measurement results include, for example, at least one of the following: available measurement results of measurement objects related to the current serving cell, available measurement results of measurement objects related to neighboring cells configured on the network side, available measurement results of measurement objects related to the direct link between the remote user equipment and the relay user equipment configured on the network side, and other available measurement results, where the measurement objects are, for example, frequency points, reference signals, etc. The remote UE uses the PC5 RLC configuration to send RRC signaling to the network side through the relay UE to indicate that a radio link failure occurs on the direct path.

[0068] In step 220, the base station receives a wireless link failure indication sent by the remote user equipment through the relay user equipment, which is used to indicate that a wireless link failure occurs in the direct connection path between the remote user equipment and the base station of the current service cell, and sends indication information related to the wireless link failure processing to the remote user equipment through the relay user equipment to instruct the remote user equipment to perform corresponding processing operations.

[0069] The base station receives the RRC signaling carrying the radio link failure indication sent by the remote UE through the relay UE, and sends the RRC signaling carrying the indication information related to the radio link failure processing to the remote UE through the relay UE. The indication information related to the radio link failure processing can indicate the configuration information related to the remote UE, which is used to restore the direct connection path, or switch to the indirect connection path, or release the RRC connection, etc.

[0070] (1) The network side (base station) attempts to restore the Uu interface radio link for the remote UE based on the measurement results reported by the remote UE, that is, attempts to restore the direct connection path. Possible situations include: based on the currently available measurement results, if there is a target cell that meets the switching conditions, the remote user equipment is sent an indication message (RRC signaling) of switching to the target cell through the relay user equipment, and carries the switching related configuration information (for example, the switching related configuration information configured by the target cell for the remote UE). The switching related configuration information, for example, includes the following content: the radio bearer configuration of the target cell, the random access resource information and related parameter configuration used for the UE to initiate random access to the target cell, etc. The base station selects to send different RRC signaling messages according to the type of the selected target cell. For example, if the target cell is an NR cell, the base station sends an RRCReconfiguration message; if the target cell is a cell of a different system, such as LTE (Long Term Evolution), the base station sends a MobilityFromNRCommand message.

[0071] (2) Based on the measurement results reported by the remote UE, if there is an available non-direct path, the network side (base station) sends an indication message (RRC signaling) to the remote user equipment to switch to the non-direct path through the relay user equipment to continue service transmission. For example, if the network side does not find a suitable neighboring cell to be switched, but the current non-direct path is still available, the remote UE is instructed to switch to the current non-direct path to continue service transmission. For another example, the network side can also instruct the remote UE to trigger relay UE reselection, reselect to other relay UEs with better link quality, and continue service transmission through the non-direct path.

[0072] (3) Based on the measurement results reported by the remote UE, if there is no target cell that meets the handover conditions and no available indirect connection path, the network side (base station) sends an RRC release message to the remote UE through the relay UE, instructing the remote UE to release the RRC connection and enter the idle state.

[0073] In step 230, the remote user equipment receives the indication information related to the radio link failure processing returned by the base station through the relay user equipment, and performs corresponding processing operations according to the indication information related to the radio link failure processing.

[0074] The remote user equipment receives the RRC signaling carrying the indication information related to the radio link failure processing returned by the base station through the relay user equipment, and performs corresponding processing operations according to the indication information related to the radio link failure processing. For example, the remote user equipment switches to the target cell according to the switching related configuration information of the indicated target cell; or, the remote user equipment switches to the non-direct path according to the indication of switching to the non-direct path; or, the remote user equipment releases the RRC connection according to the indicated RRC release message.

[0075] In some embodiments, the remote user equipment starts a timer while sending a radio link failure indication to the base station through a relay user equipment, and stops the timer when receiving indication information related to radio link failure processing returned by the base station, and triggers the RRC reestablishment process when the timer times out if the indication information related to radio link failure processing returned by the base station is still not received. The indication information related to radio link failure processing includes at least one of the aforementioned, such as indication information for switching to a target cell, indication information for switching to a non-direct path, RRC release message, etc.

[0076] The remote UE can send a radio link failure indication to the network side through the relay UE, helping the network side to quickly understand that the radio link failure occurs in the direct connection path of the remote UE, and quickly help the remote UE restore the direct connection path or switch to the indirect connection path to continue service transmission or release the RRC connection, so as to report the radio link failure based on the indirect connection path and perform rapid recovery, effectively reducing unnecessary RRC reconstruction process and service interruption time in the multi-path Relay scenario, thereby better ensuring service continuity and improving user experience.

[0077] Multi-path relay communication scenarios include the same-base-station multi-path relay scenario and the inter-base-station multi-path relay scenario. The following describes the wireless link failure handling process in each scenario.

[0078] like Figure 1 As shown in (a), in the same base station multi-path relay scenario, the direct base station of the remote UE and the relay UE is the same base station (set as the third base station). When a wireless link failure occurs in the direct connection path between the remote UE and the base station, the remote UE can forward the RRC signaling sent by the remote UE to the base station through an indirect connection path, indicating that the wireless link failure occurs in the direct connection path of the remote UE.

[0079] Figure 3 A schematic diagram of a wireless link failure processing flow in a same-base station multi-path relay scenario according to some embodiments of the present disclosure is shown.

[0080] like Figure 3 As shown, the method for handling wireless link failure in the same base station multi-path relay scenario of this embodiment includes:

[0081] In step 310, the remote UE detects that a radio link failure occurs on the direct connection path, triggers a radio link failure reporting process, and starts a timer related to the radio link failure.

[0082] In step 320, the remote UE sends a first RRC signaling to the base station through a non-direct path, which is forwarded by the relay UE, indicating that a radio link failure occurs in the direct path of the remote UE; the first RRC signaling includes at least an indication of the type of radio link failure and all currently available measurement results.

[0083] In step 330, the base station receives the first RRC signaling indicating the failure of the radio link, and sends a second RRC signaling to the remote UE through the relay UE, carrying the indication information related to the radio link failure processing, for example, indicating the remote UE to restore the switching related configuration information of the direct path, or instructing the remote UE to switch to the non-direct path, or instructing the remote UE to release the RRC connection. The base station can choose to instruct the remote UE to switch to another target cell, or instruct the remote UE to switch to the non-direct path, or instruct the remote UE to release the RRC connection based on the measurement result reported by the remote UE.

[0084] In step 340, the remote UE receives the second RRC signaling sent by the base station forwarded by the relay UE, and stops the operation of the timer related to the wireless link failure; the remote UE performs corresponding processing operations according to the indication information of the second RRC signaling, such as switching to other target cells, switching to a non-direct connection path, or releasing the RRC connection.

[0085] In step 350, if the timer related to the radio link failure times out and the remote UE still does not receive the second RRC signaling, the remote UE triggers the RRC reestablishment process.

[0086] In the multi-path relay scenario on the same base station, when a wireless link failure occurs on the direct connection path, the wireless link failure is reported based on the indirect connection path and quickly recovered, reducing unnecessary RRC reconstruction processes, shortening service interruption time, and improving user experience.

[0087] like Figure 4As shown, in the multi-path relay scenario between base stations, the directly connected base stations of the remote UE and the relay UE are different base stations, where the directly connected base station of the remote UE is base station 1 (set as the first base station), and the directly connected base station of the relay UE is base station 2 (set as the second base station), and the base stations need to interact through the Xn interface. When the wireless link fails in the direct connection path between the remote UE and base station 1, the remote UE can forward the RRC signaling sent by the remote UE to base station 2 through a non-direct connection path, and through the Xn interface between base stations, base station 2 encapsulates the RRC signaling sent by the remote UE in the Xn signaling and forwards it to base station 1, indicating that the remote UE has a wireless link failure. The direct connection base station of the remote UE (base station 1) makes subsequent decisions on wireless link failure recovery and base station signaling interaction with the target cell of the handover (if a cell handover is decided).

[0088] Figure 5 A schematic diagram of the wireless link failure processing flow in a multi-path relay scenario between base stations in some embodiments of the present disclosure is shown.

[0089] like Figure 5 As shown, the method for handling wireless link failure in the multi-path relay scenario between base stations of this embodiment includes:

[0090] In step 510, the remote UE detects that a radio link failure occurs on the direct connection path, triggers a radio link failure reporting process, and starts a timer related to the radio link failure.

[0091] In step 520, the remote UE sends a first RRC signaling to base station 2 via a non-direct path and forwarded by the relay UE, indicating that a radio link failure occurs in the direct path of the remote UE; the first RRC signaling includes at least an indication of the type of radio link failure and all currently available measurement results.

[0092] In step 530, base station 2 receives the first RRC signaling forwarded by the relay UE indicating the failure of the radio link of the remote UE, encapsulates the first RRC signaling in the first Xn signaling, and sends it to the directly connected base station 1 of the remote UE through the Xn interface.

[0093] In step 540, base station 1 receives the first Xn signaling sent by base station 2, obtains the first RRC signaling encapsulated in the Xn signaling, and makes a decision on radio link failure recovery based on the measurement results reported by the remote UE. It can choose to instruct the remote UE to switch to other target cells to restore the direct path, or instruct the remote UE to switch to a non-direct path, or instruct the remote UE to release the RRC connection. If base station 1 chooses to switch the remote UE to other target cells, base station 1 performs handover-related signaling interaction with the base station of the target cell to be switched. Based on the decision, base station 1 generates a second RRC signaling sent to the remote UE, carrying indication information related to radio link failure processing, and encapsulates it in the second Xn signaling and sends it to base station 2. The second RRC signaling sent by base station 1 to the remote UE indicates the handover-related configuration information used by the remote UE to restore the direct path, or instructs the remote UE to switch to a non-direct path, or instructs the remote UE to release the RRC connection.

[0094] In step 550, base station 2 receives the second Xn signaling sent by base station 1, obtains the second RRC signaling encapsulated in the second Xn signaling, and forwards the second RRC signaling to the relay UE, which then forwards it to the remote UE.

[0095] In step 560, the remote UE receives the second RRC signaling forwarded by the relay UE and stops the operation of the timer related to the wireless link failure; the remote UE performs corresponding processing operations according to the indication information of the second RRC signaling, such as switching to other target cells, switching to a non-direct connection path, or releasing the RRC connection.

[0096] In step 570, if the timer related to the radio link failure times out and the remote UE still does not receive the second RRC signaling, the remote UE triggers the RRC reestablishment process.

[0097] In the multi-path relay scenario between base stations, the directly connected base station of the remote UE is responsible for the decision and instruction of wireless link failure recovery. When the remote UE needs to be switched to another cell, the directly connected base station of the remote UE will perform switching-related signaling interaction with the target cell; the directly connected base station of the relay UE is responsible for forwarding and cannot modify the content of the RRC signaling message.

[0098] In the multi-path relay scenario between base stations, when a wireless link failure occurs on the direct path, the wireless link failure is reported based on the indirect path and quickly recovered, reducing unnecessary RRC reconstruction processes, shortening service interruption time, and improving user experience.

[0099] Figure 6 A schematic diagram showing the structure of a remote user device according to some embodiments of the present disclosure is shown.

[0100] like Figure 6 As shown, the remote user equipment 600 of this embodiment includes: a memory 610 and a processor 620 coupled to the memory 610, and the processor 620 is configured to execute the wireless link failure processing method in any of the aforementioned embodiments based on the instructions stored in the memory 610.

[0101] The remote user equipment 600 may further include an input / output interface 630 , a network interface 640 , a storage interface 650 , etc. These interfaces 630 , 640 , 650 , the memory 610 , and the processor 620 may be connected, for example, via a bus 660 .

[0102] Figure 7 A schematic diagram showing the structure of a remote user device according to some embodiments of the present disclosure is shown.

[0103] like Figure 7 As shown, the remote user equipment 700 of this embodiment includes:

[0104] The sending module 710 is configured to monitor that a radio link failure occurs in the direct connection path between the remote user equipment and the base station of the current serving cell, and to send a radio link failure indication to the base station through the relay user equipment, indicating that a radio link failure occurs in the direct connection path between the remote user equipment and the base station of the current serving cell. The content of the radio link failure indication includes: an indication of the type of radio link failure and currently available measurement results. The currently available measurement results include: one or more of the available measurement results of the measurement objects related to the current serving cell, the available measurement results of the measurement objects related to the neighboring cell, and the available measurement results of the measurement objects related to the direct link between the remote user equipment and the relay user equipment.

[0105] The receiving module 720 is configured to receive, through the relay user equipment, indication information related to radio link failure processing returned by the base station.

[0106] The execution module 730 is configured to perform corresponding processing operations according to the indication information related to the radio link failure processing. The remote user equipment switches to the target cell according to the switching related configuration information of the indicated target cell; or the remote user equipment switches to the non-direct path according to the indication of switching to the non-direct path; or the remote user equipment releases the RRC connection according to the indicated radio resource control RRC release message.

[0107] The sending module 710 starts the timer while sending the wireless link failure indication to the base station through the relay user equipment; the receiving module 720 stops the timer when receiving the indication information related to the wireless link failure processing returned by the base station; the remote user equipment 700 also includes a timeout processing module 740, which is configured to trigger the RRC reconstruction process when the timer times out and the indication information related to the wireless link failure processing returned by the base station is not received.

[0108] When the directly connected base station of the remote user equipment is the first base station and the directly connected base station of the relay user equipment is the second base station: the sending module 710 sends the radio link failure indication to the relay user equipment through the first RRC signaling, the relay user equipment sends the first RRC signaling to the second base station, the second base station encapsulates the first RRC signaling in the first Xn signaling, sends the first Xn signaling to the first base station, the first base station sends the indication information related to the radio link failure processing to the second base station through the second Xn signaling, the second base station sends the indication information related to the radio link failure processing encapsulated in the second Xn signaling to the relay user equipment through the second RRC signaling, and the relay user equipment sends the second RRC signaling to the remote user equipment. The receiving module 720 receives the second RRC signaling sent by the relay user equipment.

[0109] When the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are the third base station: the sending module 710 sends the wireless link failure indication to the relay user equipment through the first RRC signaling, the relay user equipment sends the first RRC signaling to the third base station, the third base station sends the indication information related to the wireless link failure processing to the relay user equipment through the second RRC signaling, and the relay user equipment sends the second RRC signaling to the remote user equipment; the receiving module 720 receives the second RRC signaling sent by the relay user equipment.

[0110] Figure 8 A schematic diagram of the structure of a base station according to some embodiments of the present disclosure is shown.

[0111] like Figure 8 As shown, the base station 800 of this embodiment includes: a memory 810 and a processor 820 coupled to the memory 810, and the processor 820 is configured to execute the wireless link failure processing method in any of the aforementioned embodiments based on the instructions stored in the memory 810.

[0112] The base station 800 may further include an input / output interface 830 , a network interface 840 , a storage interface 850 , etc. These interfaces 830 , 840 , 850 , the memory 810 , and the processor 820 may be connected via a bus 860 , for example.

[0113] Fig. 9 A schematic diagram of the structure of a base station according to some embodiments of the present disclosure is shown.

[0114] like Fig. 9 As shown, the base station 900 of this embodiment includes:

[0115] The receiving module 910 is configured to receive a radio link failure indication sent by a remote user equipment via a relay user equipment, which is used to indicate that a radio link failure occurs in a direct connection path between the remote user equipment and a base station of a current serving cell.

[0116] The sending module 920 is configured to send the indication information related to the wireless link failure processing to the remote user equipment through the relay user equipment to instruct the remote user equipment to perform the corresponding processing operation. For example, according to the currently available measurement results, if there is a target cell that meets the switching conditions, the indication information of switching to the target cell is sent to the remote user equipment through the relay user equipment, and the switching-related configuration information is carried; or, according to the currently available measurement results, if there is an available non-direct path, the indication information of switching to the non-direct path is sent to the remote user equipment through the relay user equipment; according to the currently available measurement results, if there is no target cell that meets the switching conditions and an available non-direct path, an RRC release message is sent to the remote user equipment through the relay user equipment.

[0117] When the directly connected base station of the remote user equipment is the first base station and the directly connected base station of the relay user equipment is the second base station, the base stations include the first base station and the second base station: the second base station receives the wireless link failure indication reported by the remote user equipment forwarded by the relay user equipment, performs signaling conversion and sends it to the first base station; the first base station sends the indication information related to the wireless link failure processing to the second base station, and the second base station performs signaling conversion and sends it to the remote user equipment through the relay user equipment.

[0118] When the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are a third base station, the base station includes a third base station: the third base station receives the wireless link failure indication reported by the remote user equipment forwarded by the relay user equipment; the third base station sends the indication information related to the wireless link failure processing to the remote user equipment through the relay user equipment.

[0119] Fig.10 A schematic diagram showing a multi-path relay communication system according to some embodiments of the present disclosure.

[0120] like Fig.10As shown, the multi-path relay communication system of this embodiment includes: remote user equipment 600, 700; relay user equipment 1000; and base stations 800, 900.

[0121] Among them, the memory 610, 810 may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs. Among them, the processor 620, 820 may be implemented by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistors and other discrete hardware components. The input and output interface 630, 830 provides a connection interface for input and output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 640, 840 provides a connection interface for various networked devices. The storage interface 650, 850 provides a connection interface for external storage devices such as SD cards and USB flash drives. The bus 660, 860 may use any of a variety of bus structures. For example, the bus structure includes, but is not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, and a Peripheral Component Interconnect (PCI) bus.

[0122] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more non-transient computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer program code.

[0123] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0124] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0125] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0126] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A method for handling wireless link failure, characterized in that: include: The remote user equipment detects that a radio link failure occurs in a direct connection path between the remote user equipment and a base station of a current serving cell, and sends a radio link failure indication to the base station through a relay user equipment, which is used to indicate that a radio link failure occurs in a direct connection path between the remote user equipment and the base station of the current serving cell, wherein the content of the radio link failure indication includes: currently available measurement results, including: available measurement results of measurement objects related to the current serving cell, available measurement results of measurement objects related to neighboring cells, and available measurement results of measurement objects related to a direct link between the remote user equipment and the relay user equipment; The remote user equipment receives the indication information related to the wireless link failure processing sent by the base station through the relay user equipment, wherein the indication information related to the wireless link failure processing is decided by the base station based on the currently available measurement results and indicated to the remote user equipment, and the indication content includes: a target cell that meets the switching conditions and switching-related configuration information, or an available non-direct connection path for switching, or an RRC release message, so that the remote user equipment switches to the target cell according to the indication, or switches to the non-direct connection path, or releases the RRC connection.

2. The method according to claim 1, characterized in that: Also includes: The remote user equipment receives, through the relay user equipment, a second RRC signaling returned by the base station, where the second RRC signaling includes indication information related to radio link failure processing; The remote user equipment performs corresponding processing operations according to the second RRC signaling.

3. The method according to claim 1, characterized in that The content of the radio link failure indication also includes: a type indication of the radio link failure.

4. The method according to claim 2, characterized in that: The remote user equipment performs corresponding processing operations including: The remote user equipment switches to the target cell according to the switching related configuration information of the indicated target cell; or, The remote user equipment switches to the indirect path according to the instruction to switch to the indirect path; or, The remote user equipment releases the RRC connection according to the indicated radio resource control RRC release message. Among them, the direct connection path refers to the communication path between the remote user equipment and the base station through the Uu interface between it and the base station, and the indirect connection path refers to the communication path between the remote user equipment and the base station through the PC5 interface between it and the relay user equipment and the Uu interface between the relay user equipment and the base station.

5. The method according to claim 1, 2 or 3, characterized in that: Also includes: When the remote user equipment sends a wireless link failure indication to the base station through the relay user equipment, the remote user equipment starts a timer, and when the second RRC signaling or indication information related to the wireless link failure processing returned by the base station is received, the timer is stopped. When the timer times out, if the second RRC signaling or indication information related to the wireless link failure processing returned by the base station is still not received, the RRC reconstruction process is triggered.

6. The method according to claim 1, 2 or 3, characterized in that: When the directly connected base station of the remote user equipment is the first base station and the directly connected base station of the relay user equipment is the second base station: The remote user equipment sends the radio link failure indication to the relay user equipment through the first RRC signaling, the relay user equipment sends the first RRC signaling to the second base station, the second base station encapsulates the first RRC signaling in the first Xn signaling, and sends the first Xn signaling to the first base station; or The first base station sends a second RRC signaling or indication information related to the radio link failure processing to the second base station through a second Xn signaling, and the second base station sends the second RRC signaling or the indication information related to the radio link failure processing encapsulated in the second Xn signaling to the relay user equipment through a second RRC signaling, and the relay user equipment sends the second RRC signaling to the remote user equipment.

7. The method according to claim 1, 2 or 3, characterized in that: When the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are the third base station: The remote user equipment sends the radio link failure indication to the relay user equipment through the first RRC signaling, and the relay user equipment sends the first RRC signaling to the third base station; The third base station sends the second RRC signaling or indication information related to the radio link failure processing to the relay user equipment through the second RRC signaling, and the relay user equipment sends the second RRC signaling to the remote user equipment.

8. A method for handling wireless link failure, characterized in that: include: Receiving a radio link failure indication sent by a remote user equipment through a relay user equipment, which is used to indicate that a radio link failure occurs in a direct connection path between the remote user equipment and a base station of a current serving cell, wherein the content of the radio link failure indication includes currently available measurement results, including: available measurement results of measurement objects related to the current serving cell, available measurement results of measurement objects related to neighboring cells, and available measurement results of measurement objects related to a direct link between the remote user equipment and the relay user equipment; According to the currently available measurement result, the indication information related to the wireless link failure processing is sent to the remote user equipment through the relay user equipment, including: according to the currently available measurement result, if there is a target cell that meets the switching condition, sending the indication information of switching to the target cell to the remote user equipment through the relay user equipment, and carrying the switching related configuration information; or, according to the currently available measurement result, if there is an available non-direct path, sending the indication information of switching to the non-direct path to the remote user equipment through the relay user equipment; according to the currently available measurement result, if there is no target cell that meets the switching condition and no available non-direct path, sending an RRC release message to the remote user equipment through the relay user equipment.

9. The method according to claim 8, characterized in that Also includes: The second RRC signaling is sent to the remote user equipment through the relay user equipment to instruct the remote user equipment to perform a corresponding processing operation, wherein the second RRC signaling includes indication information related to radio link failure processing.

10. The method according to claim 8 or 9, characterized in that: The content of the radio link failure indication also includes: a type indication of the radio link failure.

11. The method according to claim 8 or 9, characterized in that: When the directly connected base station of the remote user equipment is the first base station and the directly connected base station of the relay user equipment is the second base station: The second base station receives the first RRC signaling carrying the radio link failure indication sent by the remote user equipment through the relay user equipment, encapsulates the first RRC signaling in a first Xn signaling, and sends the first Xn signaling to the first base station; The first base station sends the second RRC signaling or the indication information related to the radio link failure processing to the second base station through the second Xn signaling, and the second base station sends the second RRC signaling or the indication information related to the radio link failure processing encapsulated in the second Xn signaling to the relay user equipment through the second RRC signaling, so that the relay user equipment sends the second RRC signaling to the remote user equipment.

12. The method according to claim 9, characterized in that When the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are the third base station: Receiving, by the third base station, a first RRC signaling carrying the radio link failure indication and sent by the remote user equipment through the relay user equipment; The third base station sends the second RRC signaling carrying the second RRC signaling or the indication information related to the radio link failure processing to the remote user equipment through the relay user equipment.

13. A remote user equipment, comprising: A sending module is configured to monitor that a radio link failure occurs in a direct connection path between a remote user equipment and a base station of a current serving cell, and to send a radio link failure indication to the base station through a relay user equipment, to indicate that a radio link failure occurs in a direct connection path between the remote user equipment and the base station of the current serving cell, wherein the content of the radio link failure indication includes: currently available measurement results, including: available measurement results of measurement objects related to the current serving cell, available measurement results of measurement objects related to neighboring cells, and available measurement results of measurement objects related to a direct link between the remote user equipment and the relay user equipment; The receiving module is configured to receive indication information related to wireless link failure processing sent by the base station through the relay user equipment, wherein the indication information related to wireless link failure processing is decided by the base station based on the currently available measurement results and indicated to the remote user equipment, and the indication content includes: a target cell that meets the switching conditions and switching-related configuration information, or an available non-direct path for switching, or an RRC release message, so that the remote user equipment switches to the target cell according to the indication, or switches to the non-direct path, or releases the RRC connection.

14. A remote user equipment, comprising: Memory; And a processor coupled to the memory, wherein the processor is configured to execute the wireless link failure processing method according to any one of claims 1 to 5 based on instructions stored in the memory.

15. A base station, comprising: A receiving module is configured to receive a radio link failure indication sent by a remote user equipment through a relay user equipment, which is used to indicate that a radio link failure occurs in a direct connection path between the remote user equipment and a base station of a current serving cell, wherein the content of the radio link failure indication includes currently available measurement results, including: available measurement results of measurement objects related to the current serving cell, available measurement results of measurement objects related to neighboring cells, and available measurement results of measurement objects related to a direct link between the remote user equipment and the relay user equipment; The sending module is configured to send the indication information related to the wireless link failure processing to the remote user equipment through the relay user equipment according to the currently available measurement result, including: according to the currently available measurement result, if there is a target cell that meets the switching condition, sending the indication information of switching to the target cell to the remote user equipment through the relay user equipment, and carrying the switching related configuration information; or, according to the currently available measurement result, if there is an available non-direct path, sending the indication information of switching to the non-direct path to the remote user equipment through the relay user equipment; according to the currently available measurement result, if there is no target cell that meets the switching condition and no available non-direct path, sending an RRC release message to the remote user equipment through the relay user equipment.

16. A base station, comprising: Memory; and a processor coupled to the memory, wherein the processor is configured to execute the wireless link failure processing method according to any one of claims 8 to 12 based on instructions stored in the memory.

17. The base station according to claim 15 or 16, characterized in that: When the directly connected base station of the remote user equipment is the first base station and the directly connected base station of the relay user equipment is the second base station, the base stations include the first base station and the second base station; When the directly connected base station of the remote user equipment and the directly connected base station of the relay user equipment are third base stations, the base station is the third base station.

18. A relay communication system, comprising: The remote user equipment according to claim 13 or 14; Relay user equipment; as well as, A base station as described in any one of claims 15 to 17.

19. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the steps of the wireless link failure processing method according to any one of claims 1 to 12 are implemented.

Images