Method, terminal and base station for reporting link failure

Abstract

The present disclosure provides a link failure reporting method, a terminal and a base station. The link failure reporting method comprises: sending first information to a first base station, the first information being used to inform the base station of information related to link failure reporting.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of wireless communication, and more particularly, to a method for reporting link failure, a terminal and a base station. BACKGROUND

[0002] To meet the demand for wireless data traffic "off the chart" since the deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a "beyond 4G network" or a "post LTE system."

[0003] Wireless communication is one of the most successful innovations in modern history. Recently, the number of subscribers to wireless communication services has exceeded 5 billion and is still growing rapidly. As smartphones and other mobile data devices (e.g., tablet computers, notebook computers, netbooks, e-book readers, and machine-type devices) are increasingly popular among consumers and businesses, the demand for wireless data services is rapidly growing. In order to meet the high-speed growth of mobile data services and support new applications and deployments, it is essential to improve the efficiency and coverage of the wireless interface. SUMMARY

[0004] TECHNICAL PROBLEM

[0005] There is a need for a method for reporting link failure, a terminal and a base station.

[0006] TECHNICAL SOLUTION

[0007] According to an aspect of the present disclosure, a method for reporting link failure performed by a user equipment is provided, the method comprising: transmitting first information to a first base station, the first information being used to inform the base station of information related to reporting of link failure.

[0008] According to another aspect of the present disclosure, a method for reporting link failure performed by a first base station is provided, further comprising: receiving first information transmitted by a user equipment, the first information being used to inform the base station of information related to reporting of link failure.

[0009] According to another aspect of the present disclosure, a method for forwarding link failure information performed by a second base station is provided, the method comprising: receiving a first failure indication message transmitted by a first base station, the first failure indication message being used for the first base station to inform the second base station of information related to reporting of link failure of a user equipment or information related to reestablishment; transmitting a first handover report message to a third base station, the first handover report being used for the second base station to inform the third base station of information related to reporting of link failure of the user equipment or information related to reestablishment.

[0010] According to another aspect of the disclosure, a user equipment is provided, the user equipment comprising: a transceiver configured to transmit and receive signals with an external; and a processor configured to control the transceiver to perform any of the above-mentioned methods performed by a user terminal.

[0011] According to another aspect of the disclosure, a base station is provided, the base station comprising: a transceiver configured to transmit and receive signals with an external; and a processor configured to control the transceiver to perform any of the above-mentioned methods performed by the above-mentioned first base station or second base station.

[0012] According to another aspect of the disclosure, a non-transitory computer-readable recording medium having stored thereon a program for executing any of the above-mentioned methods when executed by a computer is provided.

[0013] Advantageous Effects

[0014] The disclosure provides a method, a terminal and a base station for reporting link failure, which helps to solve the problem caused by link failure in the handover process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is an exemplary system architecture of system architecture evolution (SAE).

[0016] Figure 2 is an exemplary system architecture according to various embodiments of the disclosure.

[0017] Figure 3 Fig. 1 shows a schematic diagram of a communication process between a user equipment and a network side in a handover process according to an embodiment of the disclosure.

[0018] Figure 4 Fig. 3 shows a schematic diagram of a link failure condition according to an embodiment of the disclosure.

[0019] Figure 5 Fig. 5 shows a flowchart of a method for recording link failure related information according to an embodiment of the disclosure.

[0020] Figure 6 Fig. 7 shows a flowchart of a configuration method of a link failure according to an embodiment of the disclosure.

[0021] Figure 7 Fig. 9 shows an interaction schematic diagram of a configuration method of a link failure according to an embodiment of the disclosure.

[0022] Figure 8 Fig. 11 shows an interaction schematic diagram of a configuration method of a link failure according to an embodiment of the disclosure.

[0023] Figure 9A flow chart of a method for reporting link failure is shown.

[0024] Figure 10 An interaction schematic diagram of a method for reporting link failure is shown.

[0025] Figure 11 A flow chart of a method for reporting link failure is shown.

[0026] Figure 12 An interaction schematic diagram of a method for reporting link failure is shown.

[0027] Figure 13 A partial flow chart of a method for reporting link failure is shown.

[0028] Figure 14 A partial flow chart of a method for reporting link failure is shown.

[0029] Figure 15 A flow chart of a method for reporting link failure is shown.

[0030] Figure 16 A flow chart of a method for forwarding link failure information is shown.

[0031] Figure 17 An interaction schematic diagram between a first base station and a second base station of a method for forwarding link failure information is shown.

[0032] Figure 18 An interaction schematic diagram between a second base station and a third base station of a method for forwarding link failure information is shown.

[0033] Figure 19 A flow chart of a method for reporting link failure is shown.

[0034] Figure 20 An interaction schematic diagram of a method for reporting link failure is shown.

[0035] Figure 21 A timing diagram of a method for reporting link failure is shown.

[0036] Figure 22 is a block diagram showing the structure of a user terminal according to an embodiment of the present disclosure.

[0037] Figure 23 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure. Detailed Implementation

[0038] The following discussion Figures 1 to 23 The various embodiments used to describe the principles of this disclosure in this patent document are for illustrative purposes only and should not be construed as limiting the scope of this disclosure in any way. Those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged system or device.

[0039] Figure 1 This is an exemplary system architecture 100 of System Architecture Evolution (SAE). User Equipment (UE) 101 is a terminal device used to receive data. Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 102 is a radio access network, including macro base stations (eNodeB / NodeB) that provide the UE with an interface to access the radio network. Mobility Management Entity (MME) 103 is responsible for managing the UE's mobility context, session context, and security information. Serving Gateway (SGW) 104 primarily provides user plane functions; MME 103 and SGW 104 may reside in the same physical entity. Packet Data Network Gateway (PGW) 105 is responsible for functions such as charging and lawful interception, and may also reside in the same physical entity as SGW 104. Policy and Charging Rules Function Entity (PCRF) 106 provides Quality of Service (QoS) policies and charging criteria. Universal Packet Radio Service Support Node (SGSN) 108 is a network node device in the Universal Mobile Telecommunications System (UMTS) that provides routing for data transmission. The Home Subscriber Server (HSS) 109 is the UE's home subsystem, responsible for protecting user information including the UE's current location, the address of the serving node, user security information, and the UE's packet data context.

[0040] Figure 2 This is an exemplary system architecture 200 according to various embodiments of the present disclosure. Other embodiments of the system architecture 200 can be used without departing from the scope of the present disclosure.

[0041] User Equipment (UE) 201 is the terminal equipment used to receive data. Next-Generation Radio Access Network (NG-RAN) 202 is the radio access network, which includes base stations (gNBs or eNBs connected to the 5G core network 5GC; eNBs connected to the 5GC are also called ng-gNBs) that provide the UE with an access radio network interface. Access Control and Mobility Management Function Entity (AMF) 203 is responsible for managing the UE's mobility context and security information. User Plane Function Entity (UPF) 204 primarily provides user plane functions. Session Management Function Entity (SMF) 205 is responsible for session management. Data Network (DN) 206 includes services such as operator services, internet access, and third-party services.

[0042] Exemplary embodiments of the present disclosure are further described below with reference to the accompanying drawings.

[0043] The text and drawings are provided only as examples to help understand the present disclosure. They should not be interpreted in any way to limit the scope of the present disclosure. Although certain embodiments and examples have been provided, based on the content disclosed herein, it will be apparent to those skilled in the art that modifications can be made to the embodiments and examples shown without departing from the scope of the present disclosure.

[0044] In a conventional handover process, after receiving a handover command, the user equipment first disconnects the communication with the source base station, and then starts the process of accessing the target base station. Therefore, the conventional handover mechanism causes the interruption of the communication between the user equipment and the network side during the handover process.

[0045] With the development of technology, a new handover mechanism has appeared, in which the user equipment maintains the connection with the source base station during the handover process. Specifically, after receiving the handover command from the network side, the user equipment maintains the communication with the source base station, and at the same time starts to establish a connection with the target base station (for example, starts the random access process). After the user equipment establishes a connection with the target base station, it still maintains the communication with the source base station until it receives an indication to release the connection with the source base station.

[0046] As an implementation, the handover mechanism may, for example, be a DAPS (Dual Active Protocol stack) handover. The embodiments of the present application do not make any limitation on the specific implementation of the handover mechanism, and can also be other types of handover, such as make before break handover ("first connect then disconnect" handover), conditional handover, etc. For the convenience of description, the following description of the present application is taken as an example of DAPS handover.

[0047] When the user equipment uses this DAPS handover mechanism for handover, link failure still occurs, and the link reporting method suitable for the conventional handover mechanism is not suitable for this handover mechanism. Therefore, a link failure reporting method is needed that can be adapted to this handover mechanism.

[0048] Specifically, the following takes Figure 3 as an example to illustrate the handover mechanism. Referring to Figure 3 , Figure 3 A schematic diagram of the communication process between the user equipment and the network side during the handover process is shown.

[0049] As Figure 3 shown, at time 1, the user equipment receives a handover command sent by the source base station.

[0050] As an implementation form, the handover command can be a DAPS handover command. Of course, the implementation form of the handover command is not limited thereto, for example, it can also be a handover command in make before break handover, a handover command in conditional handover, etc.

[0051] Specifically, the handover command, for example, can be an RRCReconfiguration message containing reconfigurationWithSync information in TS38.331 standard; for example, it can also be an RRCConnectionReconfiguration message containing mobile control information in TS36.331 standard.

[0052] As an implementation form, the handover command can include indication information indicating the user equipment to perform handover. Further, the handover command can be for the user equipment, or for one or more radio bearers of the user equipment. If the handover command is for one and more radio bearers of the user equipment, it means that only these radio bearers will maintain communication with the source base station and the target base station at the same time during the handover process.

[0053] As a specific example, the handover command is a DAPS handover command, and the DAPS handover command contains indication information indicating the user equipment to perform DAPS handover. The indication information indicating the user equipment to perform DAPS handover can be for the user equipment, or for one or more radio bearers of the user equipment.

[0054] Please continue to refer to Figure 3 At time 2, the user equipment successfully accesses the target base station.

[0055] As an implementation form, if the user equipment successfully completes the random access procedure in the target cell, or sends an RRCReconfigurationComplete message to the target base station, the user equipment successfully accesses the target base station.

[0056] Next, at time 3, the network side informs the user to release the connection with the source base station.

[0057] As an implementation form, the network side, for example, can be the target base station.

[0058] As Figure 3As shown, in the switching mechanism, the user equipment can keep communicating with the source base station until time 3. Specifically, before time 3, the user equipment can receive downlink data from the source base station, i.e. information from the source base station to the user equipment, such as downlink control information (e.g. PDCCH) or downlink data information (e.g. PDSCH); or the user equipment can send uplink data to the source base station, i.e. information from the user equipment to the source base station, such as uplink control information (e.g. PUCCH) or uplink data information (e.g. PUSCH); or the user equipment can receive downlink data from the source base station and send uplink data to the source base station.

[0059] Meanwhile, from time 2, the user equipment can communicate with the target base station. Specifically, from time 2, the user equipment can receive downlink data from the target base station, i.e. information from the target base station to the user equipment, such as downlink control information (e.g. PDCCH) or downlink data information (e.g. PDSCH); or the user equipment can send uplink data to the target base station, i.e. information from the user equipment to the target base station, such as uplink control information (e.g. PUCCH) or uplink data information (e.g. PUSCH); or the user equipment can receive downlink data from the target base station and send uplink data to the target base station.

[0060] Further, the uplink data can be all uplink data or part of uplink data; the downlink data can be all downlink data or part of downlink data. The uplink data or downlink data can be data packets or signals.

[0061] In the conventional switching process, after receiving the switching command, the user equipment will first disconnect the communication with the source base station, and then start the process of accessing the target base station. Therefore, the conventional switching mechanism will cause the interruption of the communication between the user equipment and the network side during the switching process. However, the switching mechanism can effectively avoid the interruption of the data communication between the user equipment and the network side during the switching process.

[0062] Under the switching mechanism, the user equipment can also experience link failure. For example, the user equipment can experience one or more of the following link failures:

[0063] (1) Source link failure: i.e. the link between the user equipment and the source base station experiences link failure, such as radio link failure (RLF);

[0064] (2) Target link failure: i.e. the link between the user equipment and the target base station experiences link failure, such as radio link failure (RLF);

[0065] (3) Handover Failure: the user equipment fails in the process of accessing the target base station. As an example, it can also be referred to as DAPS handover failure in the DAPS handover mechanism.

[0066] It can be understood that the above-mentioned naming of link failure is only an example of naming, and other naming methods also belong to the protection scope of the present disclosure. As an example, the subsequent elaboration of the present disclosure will adopt the above-mentioned naming of link failure to distinguish different link failures.

[0067] Further, based on the above-mentioned handover mechanism, one or more of the above-mentioned link failures can occur, and the time when each link failure occurs in the handover process can also be different.

[0068] The following is an example of the above-mentioned handover mechanism. Figure 4 As an example, the link failure cases that can occur in the handover mechanism are described, but it can be understood that the link failure cases that can occur in the above-mentioned handover mechanism are not limited to Figure 4 the cases shown, and other link failure cases also belong to the protection scope of the present disclosure.

[0069] Reference is made to Figure 4 , Figure 4 A schematic diagram of a link failure case occurring in the above-mentioned handover mechanism is shown.

[0070] As shown in Figure 4 , the link failure cases occurring in the handover process can be divided into 9 cases, and each case will be described in detail below.

[0071] Case 1: the user equipment only occurs a source link failure, and the source link failure occurs before the user equipment successfully accesses the target base station;

[0072] Case 2: the user equipment only occurs a handover failure, for example, a DAPS handover failure;

[0073] Case 3: the user equipment only occurs a source link failure, and the source link failure occurs after the user equipment successfully accesses the target base station;

[0074] Case 4: the user equipment only occurs a target link failure, and the target link failure occurs after the user equipment successfully accesses the target base station;

[0075] Case 5: the user equipment first occurs a source link failure, and then occurs a handover failure, for example, a DAPS handover failure;

[0076] Case 6: the user equipment first occurs a handover failure (for example, a DAPS handover failure), and then occurs a source link failure;

[0077] Case 7: The user equipment first experiences a source link failure, and after the user equipment successfully accesses the target base station, a target link failure occurs;

[0078] Case 8: After the user equipment successfully accesses the target base station, a source link failure occurs first, and then a target link failure occurs;

[0079] Case 9: After the user equipment successfully accesses the target base station, a target link failure occurs first, and then a source link failure occurs.

[0080] The above link failures can be caused by unreasonable parameter settings of the switching mechanism. The traditional link failure reporting mechanism is not suitable for the above switching mechanism, and the information reported in the traditional link failure reporting mechanism cannot help the network side to find the problem of parameter configuration when the above switching is performed. Therefore, the present disclosure aims to provide a link failure reporting mechanism to help the network side solve the problems encountered in the switching process.

[0081] First, several types of information to be used in the embodiments of the present disclosure will be introduced below.

[0082] 1. First link failure information

[0083] The first link failure information can include at least one of the following information:

[0084] (1) Measurement information of a cell obtained by the user equipment when the first link failure occurs

[0085] The cell may, for example, be a 5G cell or an LTE cell, and the present disclosure does not make any limitation in this regard.

[0086] As an implementation, the cell may, for example, include one or more of the following:

[0087] - a serving cell in which the user equipment is located when the first link failure occurs;

[0088] - one or more neighbor cells of the serving cell in which the user equipment is located when the first link failure occurs;

[0089] - a source cell in which the user equipment is located when performing switching (e.g., DAPS switching, etc.);

[0090] - one or more neighbor cells of the source cell in which the user equipment is located when performing switching (e.g., DAPS switching, etc.);

[0091] - a target cell in which the user equipment is located when performing switching (e.g., DAPS switching, etc.);

[0092] - one or more neighbor cells of a target cell when the user equipment performs a handover (e.g., a DAPS handover, etc.).

[0093] As an implementation, the measurement information of a cell acquired by the user equipment may, for example, comprise one or more of the following:

[0094] - a RSRP (Reference Signal Receiving Power) of the cell, and / or a RSRQ (Reference Signal Receiving Quality) of the cell, and / or a SINR (Signal to Interference plus Noise Ratio) of the cell;

[0095] - a measurement result of the cell based on SSB (Synchronization Signal Block) measurement, which may, for example, be a RSRP, and / or a RSRQ, and / or a SINR;

[0096] - a measurement result of the cell based on CSI-RS measurement, which may, for example, be a RSRP, and / or a RSRQ, and / or a SINR;

[0097] - measurement information of each SSB, wherein each SSB measurement information comprises index information of the SSB and a measurement result of the SSB corresponding to the index information of the SSB, which may, for example, be a RSRP, and / or a RSRQ, and / or a SINR;

[0098] - measurement information of each CSI-RS, wherein each CSI-RS measurement information comprises index information of the CSI-RS and a measurement result of the CSI-RS corresponding to the index information of the CSI-RS, which may, for example, be a RSRP, and / or a RSRQ, and / or a SINR.

[0099] It can be understood that the above-mentioned embodiments are only shown as examples, and are not limited to the disclosure, and each embodiment can be used alone or in combination. For example, the measurement information of the cell acquired by the user equipment when the first link failure occurs can be the RSRP and / or RSRQ and / or SINR of the serving cell in which the user equipment is located when the first link failure occurs; or the RSRP and / or RSRQ and / or SINR of the serving cell in which the user equipment is located when the first link failure occurs based on SSB measurement; or the RSRP and / or RSRQ and / or SINR of the source cell in which the user equipment is located when performing switching (such as DAPS switching, etc.) based on CSI-RS measurement, etc., and any combination thereof is within the protection scope of the disclosure.

[0100] (2) first identification information of the user equipment

[0101] The identification information of the user equipment can be, for example, C-RNTI (Cell-Radio Network Temporary Identifier, cell radio network temporary identifier), or other information used to identify the user equipment. As an embodiment, the first identification information can be the identification information of the user equipment when the first link failure occurs, which can include at least one of the following information:

[0102] -identification information in the serving cell (or PCell) in which the user equipment is located when the first link failure occurs;

[0103] -identification information in the source cell (or source PCell) in which the user equipment is located when the first link failure occurs;

[0104] -identification information of the user equipment in the source cell (or source PCell), for example, C-RNTI, which indicates the identification information of the user equipment in the source cell (or source PCell) when performing switching (such as DAPS switching, etc.);

[0105] -identification information of the user equipment in the target cell (or target PCell), for example, C-RNTI, which indicates the identification information of the user equipment in the target cell (or target PCell) when performing switching (such as DAPS switching, etc.).

[0106] (3) identification information (previousCell / PCell ID) of the cell or PCell in which the user equipment is located when receiving the switching command before the first link failure

[0107] The identification information may be, for example, one or more of an NR (new radio) CGI (Cell Global Identifier), a PCI (Physical Cell Identifier), a carrier frequency, and the like.

[0108] As an implementation, the identification information may include, for example, at least one of the following information:

[0109] - identification information of a cell (or source cell) in which the user equipment is located when receiving a handover command before the first link failure occurs, for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like, of a cell (or source cell) in which the user equipment is located when receiving a handover command before the first link failure occurs;

[0110] - identification information of a source cell of a handover (e.g., DAPS handover), for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like, of a source cell of a handover (e.g., DAPS handover);

[0111] - identification information of a cell in which the user equipment is located when receiving a handover (e.g., DAPS handover) command, for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like, of a cell in which the user equipment is located when receiving a handover (e.g., DAPS handover) command.

[0112] (4) Indication information of a cell in which the first link failure occurs

[0113] As an implementation, the indication information may indicate, for example, at least one of the following information:

[0114] - indicating that the first link failure occurs in a source cell of a handover (e.g., DAPS handover);

[0115] - indicating that the first link failure occurs in a target cell of a handover (e.g., DAPS handover).

[0116] (5) Identification information (failedPCellID) of a cell in which the first link failure occurs

[0117] The identification information may be, for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like.

[0118] As an implementation, the identification information may include, for example, at least one of the following information:

[0119] - identification information of a cell or a PCell where the user equipment detects the first link failure, for example, one or more of NR CGI, PCI, carrier frequency, etc. of the cell or the PCell where the user equipment detects the first link failure;

[0120] - identification information of a target cell or a target PCell when the user equipment experiences a handover failure (or a DAPS handover failure), for example, one or more of NR CGI, PCI, carrier frequency, etc. of the target cell or the target PCell when the user equipment experiences the handover failure (or the DAPS handover failure);

[0121] - identification information of a source cell or a source PCell of a handover (e.g., a DAPS handover, etc.), for example, one or more of NR CGI, PCI, carrier frequency, etc. of the source cell or the source PCell of the handover (e.g., the DAPS handover, etc.);

[0122] - identification information of a target cell or a target PCell of a handover (e.g., a DAPS handover, etc.), for example, one or more of NR CGI, PCI, carrier frequency, etc. of the target cell or the target PCell of the handover (e.g., the DAPS handover, etc.).

[0123] (6) indication information of a time when the first link failure occurs;

[0124] As an implementation form, the indication information may, for example, indicate at least one of:

[0125] - indicating that the first link failure occurs before successfully accessing a cell.

[0126] The successfully accessed cell may, for example, be a target cell of a handover (e.g., a DAPS handover, etc.), and the successfully accessing a cell may, for example, refer to successfully completing a random access procedure in the cell or sending an RRCReconfigurationComplete message to the cell.

[0127] As an implementation form, the indication information may, for example, indicate that the source link failure occurs before successfully accessing a DAPS target cell.

[0128] - indicating that the first link failure occurs after successfully accessing a cell.

[0129] The successfully accessed cell may, for example, be a target cell of a handover (e.g., a DAPS handover, etc.), and the successfully accessing a cell may, for example, refer to successfully completing a random access procedure in the cell or sending an RRCReconfigurationComplete message to the cell.

[0130] As an implementation form, the indication information may, for example, indicate that the source link failure occurs after the successful access to the target cell of DAPS.

[0131] - indicates that the first link failure occurs after the second link failure.

[0132] As an implementation form, the indication information may, for example, indicate that the source link failure occurs after the target link failure.

[0133] As another implementation form, the indication information may, for example, indicate that the target link failure occurs after the source link failure.

[0134] - indicates that the second link failure occurs before the first link failure.

[0135] As an implementation form, the indication information may, for example, indicate that the source link failure occurs before the target link failure.

[0136] As another implementation form, the indication information may, for example, indicate that the target link failure occurs before the source link failure.

[0137] (7) indication information of a first link failure type;

[0138] As an implementation form, the indication information may, for example, indicate at least one of the following:

[0139] - radio link failure;

[0140] - handover failure (e.g., DAPS handover failure, etc.);

[0141] - source link failure, i.e., indicating that the first link failure is a radio link failure of a source cell of handover (e.g., DAPS handover failure, etc.);

[0142] - target link failure, i.e., indicating that the first link failure is a radio link failure of a target cell of handover (e.g., DAPS handover failure, etc.).

[0143] (8) cause information of the first link failure;

[0144] As an implementation form, the cause information of the first link failure may, for example, include at least one of the following:

[0145] - timer timeout, e.g., t310 timeout, etc.;

[0146] - random access failure;

[0147] - reaching the maximum number of retransmissions at RLC layer;

[0148] - a recovery failure of a beam failure.

[0149] (9) identification information of a target cell of the handover;

[0150] The identification information may, for example, be an NR CGI, and / or a PCI, and / or a carrier frequency, etc.

[0151] As an implementation, the target cell is a target cell of a DAPS handover, and the identification information of the target cell is an NR CGI, and / or a PCI, and / or a carrier frequency, etc. of the target cell of the DAPS handover.

[0152] (10) indication information of a handover type.

[0153] The indication information may, for example, indicate a handover type including a non-DAPS handover, a DAPS handover, a traditional / normal handover, etc.

[0154] Of course, it can be understood that the indication information may, for example, also include a make before break handover, a non-make before break handover, a conditional handover, a non-conditional handover, etc. The present disclosure does not limit this.

[0155] 2. Second link failure information

[0156] The second link failure information may include at least one of the following information:

[0157] (1) measurement information of a cell acquired by the user equipment when the second link failure occurs;

[0158] The cell may, for example, be a 5G cell or an LTE cell, and the present disclosure does not limit this.

[0159] As an implementation, the cell may, for example, include one or more of the following:

[0160] - a serving cell in which the user equipment is located when the second link failure occurs;

[0161] - one or more neighbor cells of the serving cell in which the user equipment is located when the second link failure occurs;

[0162] - a source cell in which the user equipment is located when performing a handover (for example, a DAPS handover, etc.);

[0163] - one or more neighbor cells of a source cell in which the user equipment is located when performing a handover (e.g., a DAPS handover, etc.);

[0164] - a target cell in which the user equipment is located when performing a handover (e.g., a DAPS handover, etc.);

[0165] - one or more neighbor cells of a target cell in which the user equipment is located when performing a handover (e.g., a DAPS handover, etc.).

[0166] As an implementation, the measurement information of a cell acquired by the user equipment may, for example, comprise one or more of the following:

[0167] - a RSRP (Reference Signal Receiving Power) and / or a RSRQ (Reference Signal Receiving Quality) and / or a SINR (Signal to Interference plus Noise Ratio) of the cell;

[0168] - a measurement result of the cell based on SSB (Synchronization Signal Block) measurement, which may, for example, be a RSRP and / or a RSRQ and / or a SINR;

[0169] - a measurement result of the cell based on CSI-RS measurement, which may, for example, be a RSRP and / or a RSRQ and / or a SINR;

[0170] - measurement information of each SSB, wherein each SSB measurement information comprises index information of the SSB and a measurement result of the SSB corresponding to the index information of the SSB, wherein the measurement result of the SSB may, for example, be a RSRP and / or a RSRQ and / or a SINR;

[0171] - measurement information of each CSI-RS, wherein each CSI-RS measurement information comprises index information of the CSI-RS and a measurement result of the CSI-RS corresponding to the index information of the CSI-RS, wherein the measurement result of the CSI-RS may, for example, be a RSRP and / or a RSRQ and / or a SINR.

[0172] It can be understood that the above-mentioned embodiments are only shown as examples, and are not limited to the disclosure, and each embodiment can be used alone or in combination. For example, the measurement information of the cell acquired by the user equipment when the second link failure occurs can be the RSRP and / or RSRQ and / or SINR of the serving cell in which the user equipment is located when the second link failure occurs; or the RSRP and / or RSRQ and / or SINR of the serving cell in which the user equipment is located based on SSB measurement when the second link failure occurs; or the RSRP and / or RSRQ and / or SINR of the source cell in which the user equipment is located when performing switching (such as DAPS switching, etc.) based on CSI-RS measurement, etc., and any combination thereof is within the protection scope of the disclosure.

[0173] (2) second identification information of the user equipment;

[0174] The identification information of the user equipment can be C-RNTI (Cell-Radio Network Temporary Identifier, cell radio network temporary identifier) or other information used to identify the user equipment. As an embodiment, the second identification information can be the identification information of the user equipment when the second link failure occurs, which can include at least one of the following information:

[0175] -identification information in the serving cell (or PCell) in which the user equipment is located when the second link failure occurs;

[0176] -identification information in the source cell (or source PCell) in which the user equipment is located when the second link failure occurs;

[0177] -identification information of the user equipment in the source cell (or source PCell), for example, C-RNTI, which indicates the identification information of the user equipment in the source cell (or source PCell) when performing switching (such as DAPS switching, etc.);

[0178] -identification information of the user equipment in the target cell (or target PCell), for example, C-RNTI, which indicates the identification information of the user equipment in the target cell (or target PCell) when performing switching (such as DAPS switching, etc.).

[0179] (3) identification information (previousCell / PCell ID) of the cell or PCell in which the user equipment is located when receiving the switching command before the second link failure;

[0180] The identification information may be, for example, one or more of an NR (new radio) CGI (Cell Global Identifier), a PCI (Physical Cell Identifier), a carrier frequency, and the like.

[0181] As an implementation, the identification information may include, for example, at least one of the following information:

[0182] - identification information of a cell (or source cell) in which the user equipment is located when receiving the handover command before the second link failure occurs, for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like, of a cell (or source cell) in which the user equipment is located when receiving the handover command before the second link failure occurs;

[0183] - identification information of a source cell of a handover (e.g., DAPS handover), for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like, of a source cell of a handover (e.g., DAPS handover);

[0184] - identification information of a cell in which the user equipment is located when receiving a handover (e.g., DAPS handover) command, for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like, of a cell in which the user equipment is located when receiving a handover (e.g., DAPS handover) command.

[0185] (4) indication information of a cell in which the second link failure occurs;

[0186] As an implementation, the indication information may indicate, for example, at least one of the following information:

[0187] - indicating that the second link failure occurs in a source cell of a handover (e.g., DAPS handover);

[0188] - indicating that the second link failure occurs in a target cell of a handover (e.g., DAPS handover).

[0189] (5) identification information of a cell in which the second link failure occurs (failedPCellID)

[0190] The identification information may be, for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like.

[0191] As an implementation, the identification information may include, for example, at least one of the following information:

[0192] - identification information of a cell or a PCell in which the user equipment is located when the second link failure is detected, for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like of the cell or the PCell in which the user equipment is located when the second link failure is detected;

[0193] - identification information of a target cell or a target PCell when the user equipment experiences a handover failure (or a DAPS handover failure), for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like of the target cell or the target PCell when the user equipment experiences the handover failure (or the DAPS handover failure);

[0194] - identification information of a source cell or a source PCell of a handover (e.g., a DAPS handover), for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like of the source cell or the source PCell of the handover (e.g., the DAPS handover);

[0195] - identification information of a target cell or a target PCell of a handover (e.g., a DAPS handover), for example, one or more of an NR CGI, a PCI, a carrier frequency, and the like of the target cell or the target PCell of the handover (e.g., the DAPS handover).

[0196] (6) indication information of a time when the second link failure occurs;

[0197] As an implementation form, the indication information may, for example, indicate at least one of the following:

[0198] - indicating that the second link failure occurs before successfully accessing a cell.

[0199] The successfully accessed cell may, for example, be a target cell of a handover (e.g., a DAPS handover), and the successfully accessing the cell may, for example, refer to successfully completing a random access procedure in the cell or sending an RRCReconfigurationComplete message to the cell.

[0200] As an implementation form, the indication information may, for example, indicate that the source link failure occurs before successfully accessing a DAPS target cell.

[0201] - indicating that the second link failure occurs after successfully accessing a cell.

[0202] The successfully accessed cell may, for example, be a target cell of a handover (e.g., a DAPS handover), and the successfully accessing the cell may, for example, refer to successfully completing a random access procedure in the cell or sending an RRCReconfigurationComplete message to the cell.

[0203] As an implementation form, the indication information may, for example, indicate that the source link failure occurs after the successful access to the target cell of DAPS.

[0204] - indicates that the first link failure occurs after the second link failure.

[0205] As an implementation form, the indication information may, for example, indicate that the source link failure occurs after the target link failure.

[0206] As another implementation form, the indication information may, for example, indicate that the target link failure occurs after the source link failure.

[0207] - indicates that the second link failure occurs before the first link failure.

[0208] As an implementation form, the indication information may, for example, indicate that the source link failure occurs before the target link failure;

[0209] As another implementation form, the indication information may, for example, indicate that the target link failure occurs before the source link failure.

[0210] (7) indication information of a second link failure type;

[0211] As an implementation form, the indication information may, for example, indicate at least one of the following:

[0212] - a radio link failure;

[0213] - a handover failure (e.g., a DAPS handover failure, etc.);

[0214] - a source link failure, i.e., indicating that the second link failure is a radio link failure of a source cell of a handover (e.g., a DAPS handover failure, etc.);

[0215] - a target link failure, i.e., indicating that the second link failure is a radio link failure of a target cell of a handover (e.g., a DAPS handover failure, etc.).

[0216] (8) cause information of the second link failure;

[0217] As an implementation form, the cause information of the second link failure may, for example, include at least one of the following:

[0218] - a timer timeout, e.g., a t310 timeout, etc.;

[0219] - a random access failure;

[0220] - reaching a maximum number of retransmissions at an RLC layer;

[0221] - a beam failure recovery failure.

[0222] (9) identification information of a target cell of the handover;

[0223] For example, the identification information can be NR CGI, and / or PCI, and / or carrier frequency, etc.

[0224] As an implementation, the target cell is a target cell of DAPS handover, and the identification information of the target cell is NR CGI, and / or PCI, and / or carrier frequency, etc. of the target cell of DAPS handover.

[0225] (10) indication information of a handover type.

[0226] For example, the indication information can indicate a handover type including non-DAPS handover, DAPS handover, traditional / normal handover, etc.

[0227] Of course, it can be understood that the indication information can also include make before break handover, non-make before break handover, conditional handover, non-conditional handover, etc. The present application does not limit this.

[0228] 3. Time length information

[0229] The time length information can include at least one of the following information:

[0230] (1) time length information experienced from handover initialization to occurrence of a first link failure.

[0231] As an implementation, the handover initialization can be, for example, that the user receives a handover command (e.g., a DAPS handover command, etc.).

[0232] As an implementation, the time length information can include, for example, time length information experienced from handover initialization (e.g., receiving a DAPS handover command, etc.) to occurrence of a source link failure.

[0233] As another implementation, the time length information can include, for example, time length information experienced from handover initialization (e.g., receiving a DAPS handover command) to occurrence of a handover failure (e.g., DAPS handover failure, etc.).

[0234] As yet another implementation, the time length information may, for example, include time length information experienced from handover initialization (e.g., receiving a DAPS handover command, etc.) to occurrence of a target link failure.

[0235] (2) time length information experienced from handover initialization to occurrence of a second link failure;

[0236] As an implementation, the handover initialization may, for example, be when a user receives a handover command (e.g., a DAPS handover command, etc.).

[0237] As an implementation, the time length information may, for example, include time length information experienced from handover initialization (e.g., receiving a DAPS handover command, etc.) to occurrence of a source link failure.

[0238] As another implementation, the time length information may, for example, include time length information experienced from handover initialization (e.g., receiving a DAPS handover command, etc.) to occurrence of a handover failure (e.g., a DAPS handover failure, etc.).

[0239] As yet another implementation, the time length information may, for example, include time length information experienced from handover initialization (e.g., receiving a DAPS handover command, etc.) to occurrence of a target link failure.

[0240] (3) time length information between occurrence of a first link failure and occurrence of a second link failure;

[0241] As an implementation, if the second link failure occurs before the first link failure, the time length information may, for example, include time length information experienced from occurrence of the second link failure to occurrence of the first link failure.

[0242] As another implementation, if the second link failure occurs after the first link failure, the time length information may, for example, include time length information experienced from occurrence of the first link failure to occurrence of the second link failure.

[0243] As a specific implementation, the time length information may, for example, include time length information experienced from occurrence of a source link failure to occurrence of a handover failure (e.g., a DAPS handover failure, etc.).

[0244] As another specific implementation, the time length information may, for example, include time length information experienced from occurrence of a source link failure to occurrence of a target link failure.

[0245] As still another specific implementation, the time length information may, for example, include time length information experienced from occurrence of a handover failure (e.g., DAPS handover failure, etc.) to occurrence of a source link failure.

[0246] As still another specific implementation, the time length information may, for example, include time length information experienced from occurrence of a target link failure to occurrence of a source link failure.

[0247] (4) time length information experienced from successfully accessing a target cell of a handover (e.g., successfully completing a random access procedure at the target cell, or sending an RRCReconfigurationComplete message to the target base station, etc.) to occurrence of a first link failure;

[0248] As an implementation, the time length information may, for example, include time length information experienced from successfully accessing a target cell of a handover (e.g., DAPS handover, etc.) to occurrence of a source link failure.

[0249] As another implementation, the time length information may, for example, include time length information experienced from successfully accessing a target cell of a handover (e.g., DAPS handover, etc.) to occurrence of a target link failure.

[0250] (5) time length information experienced from successfully accessing a target cell of a handover (e.g., successfully completing a random access procedure at the target cell, or sending an RRCReconfigurationComplete message to the target base station, etc.) to occurrence of a second link failure;

[0251] As an implementation, the time length information may, for example, include time length information experienced from successfully accessing a target cell of a handover (e.g., DAPS handover, etc.) to occurrence of a source link failure.

[0252] As another implementation, the time length information may, for example, include time length information experienced from successfully accessing a target cell of a handover (e.g., DAPS handover, etc.) to occurrence of a target link failure.

[0253] (6) time length experienced from occurrence of a first link failure to successfully accessing one cell;

[0254] As an implementation, the successfully accessed one cell may, for example, be a target cell of a handover (e.g., DAPS handover, etc.), a cell accessed by user RRC reestablishment, a cell accessed by user RRC connection establishment, etc. The successfully accessed one cell may, for example, be successfully completing a random access procedure at the cell, or sending an RRCReconfigurationComplete message to the cell.

[0255] As an implementation form, the time length information may, for example, include time length information experienced from occurrence of source link failure to successful access to a DAPS target cell (or successful access to a cell where RRC reestablishment is located, or successful access to a cell where RRC connection establishment is located).

[0256] (7) time length from occurrence of second link failure to successful access to a cell;

[0257] As an implementation form, the successfully accessed cell may, for example, be a target cell of handover (e.g., DAPS handover, etc.), a cell accessed by user RRC reestablishment, or a cell accessed by user RRC connection establishment. The successfully accessed cell may, for example, be successful completion of random access procedure in the cell, or sending of RRCReconfigurationComplete message, or RRCReestablishmentComplete message, or RRCSetupComplete message, etc.

[0258] As an implementation form, the time length information may, for example, include time length information experienced from occurrence of source link failure to successful access to a DAPS target cell (or successful access to a cell where RRC reestablishment is located, or successful access to a cell where RRC connection establishment is located).

[0259] (8) time length from receiving handover command (e.g., DAPS handover command, etc.) to successful access to a target cell of handover (e.g., DAPS handover, etc.) (e.g., successful completion of random access procedure in the target cell, or sending of RRCReconfigurationComplete message to the target base station);

[0260] (9) time length of communication interruption with a DAPS source cell.

[0261] As a specific embodiment, the link failure related information may, for example, include at least one of the following information:

[0262] - measurement information of a cell acquired by the user equipment when the first link failure occurs;

[0263] - first identification information of the user equipment;

[0264] - identification information of a cell or PCell cell where the handover command is received before the first link failure

[0265] (previous Cell / PCell ID);

[0266] - an indication of the cell in which the first link failure occurred;

[0267] - identification information of the cell in which the first link failure occurred (failedPCellID);

[0268] - an indication of the time at which the first link failure occurred;

[0269] - an indication of the type of the first link failure;

[0270] - cause information of the first link failure;

[0271] - second link failure information;

[0272] - time length information;

[0273] - identification information of the target cell of the handover;

[0274] - an indication of the type of the handover.

[0275] The specific embodiments of each type of information can be found in the above description, and will not be repeated here. It can be understood that the above specific embodiments of the link failure related information are only used as examples and are not limiting to the present disclosure. Any combination of the above types of information is within the scope of the present disclosure.

[0276] 4. Link failure related information

[0277] The link failure related information may, for example, include at least one of the following information: first link failure information; second link failure information; time length information.

[0278] It can be understood that the "first" and "second" in the above first link failure and second link failure are only used for naming the link failure, which indicates two different link failures detected by the user. The first link failure can be a radio link failure or a handover failure. Specifically, the first link failure can be a source link failure, a target link failure, or a handover failure. Similarly, the second link failure can be a radio link failure or a handover failure. Specifically, the second link failure can be a source link failure, a target link failure, or a handover failure.

[0279] Further, when the first link failure is a source link failure, the first link failure information is source link failure related information; when the first link failure is a target link failure, the first link failure information is target link failure related information; and when the first link failure is a handover failure, the first link failure information is handover failure related information.

[0280] Similarly, when the second link failure is a source link failure, the second link failure information is source link failure related information; when the second link failure is a target link failure, the second link failure information is target link failure related information; when the second link failure is a handover failure, the second link failure information is handover failure related information.

[0281] Further, the source link failure related information can be the above-described link failure related information, and can include at least one of the following information: the first link failure information; the second link failure information; and time length information.

[0282] Further, the target link failure related information can be the above-described link failure related information, and can include at least one of the following information: the first link failure information; the second link failure information; and time length information.

[0283] Further, the handover failure related information can be the above-described link failure related information, and can include at least one of the following information: the first link failure information; the second link failure information; and time length information.

[0284] In addition, if more than two link failures occur during the handover process, the link failure related information can further include, for example, third link failure information, fourth link failure information, and the like. The definitions of the third link failure information, the fourth link failure information, and the like are similar to the first link failure information or the second link failure information.

[0285] 5. Information related to link failure reporting

[0286] For example, the information related to the link failure reporting can be the above-described link failure related information, and for another example, the information related to the link failure reporting can further include other information in addition to the above-described link failure related information, for example, can include at least one of the following information:

[0287] identification information of a reestablished cell;

[0288] time length information of a time period experienced after the link failure;

[0289] time length information of a time period experienced for successfully accessing a network;

[0290] indication information indicating a link failure type;

[0291] time length information from the source link failure to successful access of a target cell by the user equipment;

[0292] time length information from the source link failure to the target link failure;

[0293] time length information from the source link failure to the handover failure;

[0294] time length information from the time when the user equipment successfully accesses the target cell to the time when the source link failure occurs;

[0295] time length information from the time when the target link failure occurs to the time when the source link failure occurs;

[0296] time length information from the time when the handover failure occurs to the time when the source link failure occurs;

[0297] interval time between the source link failure and the target link failure;

[0298] time length information of the communication interruption of the user equipment;

[0299] time length information from the time when the handover is initialized to the time when the user equipment successfully accesses the target cell;

[0300] time length information from the time when the handover is initialized to the time when the source link failure occurs;

[0301] indication information that the source link failure occurs before the user equipment successfully accesses the target cell;

[0302] indication information that the source link failure occurs after the user equipment successfully accesses the target cell.

[0303] Of course, other information besides the above information can also be included, and the present disclosure does not make any limitation in this regard.

[0304] It can be understood that, as an implementation manner, the user terminal can only record the link failure related information, and report other information besides the link failure related information when reporting; as another implementation manner, the user terminal can record all information related to the link failure. Information related to link failure reporting, except The link failure related information can be recorded and reported at the time of reporting; as another implementation manner, the user terminal can record all information related to the link failure. Information related to link failure reporting.

[0305] The above information will be combined to describe in detail the processing mechanism provided by the present disclosure when the link failure occurs in the above handover mechanism.

[0306] Please refer to Figure 5 , Figure 5 a flowchart of a method for recording link failure related information provided by an embodiment of the present disclosure is shown. The method for recording link failure related information can be executed by a user equipment, and the method comprises the following steps:

[0307] In step S301, the user equipment detects a link failure.

[0308] As an implementation, the user equipment can detect one link failure at a time, for example, the user equipment can detect a first link failure, a second link failure, and so on. Specifically, the first link failure can be a source link failure, a target link failure, or a handover failure (e.g., a DAPS handover failure, etc.). The second link failure can be a source link failure, a target link failure, or a handover failure (e.g., a DAPS handover failure, etc.). It can be understood that,

[0309] The user equipment can obtain multiple link failures through multiple detections, for example, the user equipment can first detect a second link failure and then detect a first link failure. Specifically, reference can be made to Figure 4 the multiple cases shown in the table, for example, the user equipment can first detect a source link failure and then detect a handover failure (e.g., a DAPS handover failure, etc.); for another example, the user equipment can first detect a handover failure (e.g., a DAPS handover failure, etc.) and then detect a source link failure; for another example, the user equipment can first detect a source link failure and then detect a target link failure after the user equipment successfully accesses a target base station; for another example, the user equipment can first detect a source link failure after the user equipment successfully accesses a target base station and then detect a target link failure; for another example, the user equipment can first detect a target link failure after the user equipment successfully accesses a target base station and then detect a source link failure; and so on.

[0310] As another implementation, the user equipment can also simultaneously detect multiple link failures, for example, the user equipment can simultaneously detect a first link failure and a second link failure, and so on.

[0311] The specific detection method is not limited in the present disclosure, for example, the detection method in the standard TS38.331 or TS36.331, and it can be understood that any method capable of detecting a link failure falls within the protection scope of the present disclosure.

[0312] In step S302, the user equipment records information related to link failure reporting.

[0313] It can be understood that in the handover mechanism, there are multiple cases in which the user equipment can experience a link failure (e.g., reference can be made to the 9 cases in Figure 4 of course, the present disclosure is not limited to the above 9 cases) and there are multiple types of link failures (e.g., a source link failure, a target link failure, and a handover failure, etc.), therefore, there are multiple implementations of the information related to link failure reporting recorded by the user equipment, for example, the information related to link failure reporting can be the link failure related information described above, for another example, the information related to link failure reporting can also include other information in addition to the link failure related information described above, and the present disclosure does not make any limitation in this regard.

[0314] As an implementation, when the user equipment obtains multiple link failures through multiple detections, the user equipment can record the link failure related information related to the current detection each time (for specific implementation, refer to the description of the link failure related information above), and encapsulate the link failure related information recorded each time as the information related to the link failure reporting, so as to send it to the base station when requested or actively. In this way, the user equipment can make the way of reporting the information related to the link failure reporting simple, and the reporting times are reduced.

[0315] As another implementation, the user equipment can also record the link failure related information detected each time as the information related to the link failure reporting, and send it to the base station when requested or actively.

[0316] The following takes the case that the second link failure occurs before the first link failure as an example.

[0317] As a specific implementation, when the user equipment detects the second link failure, the link failure related information recorded by the user equipment can include only the second link failure information, for example; or the link failure related information recorded by the user equipment can also include the time length information, and the link failure related information is taken as the information related to the link failure reporting.

[0318] As a specific implementation, when the user equipment detects the first link failure (which can be the source link failure, the target link failure, or the handover failure), and no second link failure is detected before that, the link failure related information recorded by the user equipment can refer to the description above, and can not include the second link failure information, and the link failure related information is taken as the information related to the link failure reporting.

[0319] As a specific implementation, when the user equipment detects that the first link failure is the handover failure (for example, DAPS handover failure) or the target link failure, and the second link failure is the source link failure, the link failure related information recorded by the user equipment refers to the description above, which will not be repeated here. As an example, the link failure related information can include the second link failure information, and the link failure related information is taken as the information related to the link failure reporting.

[0320] As a specific implementation, when the user equipment detects that the first link failure is the source link failure, the handover failure (for example, DAPS handover failure) or the target link failure, the link failure related information recorded by the user equipment refers to the description above, which will not be repeated here. As an example, the link failure related information can include the second link failure information, and the link failure related information is taken as the information related to the link failure reporting.

[0321] By the method for recording the link failure related information, the user equipment can record the information obtained by the user equipment when the link failure occurs after the link failure occurs, which can help the user equipment to report to the base station, so as to help the base station to find the problem of the network (for example, the problem of the handover (for example, the DAPS handover, etc.), whether the communication between the user equipment and the base station is interrupted during the handover process, etc.), and further help the base station to reasonably set the configuration parameters to avoid the problem from occurring again.

[0322] Please refer to Figure 6 and Figure 7 , Figure 6 A flowchart of a configuration method of link failure provided by an embodiment of the present disclosure is shown. Figure 7 An interaction schematic diagram of a configuration method of link failure provided by an embodiment of the present disclosure is shown. The configuration method of link failure can be executed by a user equipment, and the method comprises:

[0323] In step S401, the first configuration information sent by the base station is received, and the first configuration information is used for the user equipment to determine whether to record the information related to the link failure report.

[0324] The base station may, for example, be a source base station, a target base station, or another base station other than the source base station and the target base station, and may also be any base station in the network, etc.

[0325] As an implementation manner, the base station can send the first configuration information to the user equipment through an RRC message, for example, through a handover command or a handover command containing a DAPS indication; as another implementation manner, the base station can send the first configuration information to the user equipment in the form of broadcasting.

[0326] As an implementation manner, the first configuration information can comprise at least one of the following:

[0327] (1) indication information indicating whether to record the link failure related information;

[0328] As an implementation manner, the indication information can comprise information indicating to record the link failure related information, or information indicating not to record the link failure related information. Specifically, the indication information may, for example, be 0 / 1, if the indication information is 1, it indicates to record the link failure related information; if the indication information is 0, it indicates not to record the link failure related information; and vice versa. The user equipment can determine whether to record the link failure related information according to the indication information.

[0329] (2) indication information indicating whether to record the source link failure related information in the handover process (for example, the DAPS handover, etc.);

[0330] As an implementation, the indication information can comprise information indicating to record source link failure related information in a handover procedure (e.g., DAPS handover, etc.), or to not record source link failure related information in a handover procedure (e.g., DAPS handover, etc.). Specifically, the indication information can be 0 / 1, for example, where 1 indicates to record source link failure related information in a handover procedure (e.g., DAPS handover, etc.), and 0 indicates to not record source link failure related information in a handover procedure (e.g., DAPS handover, etc.), or vice versa. The user equipment can determine whether to record source link failure related information in a handover procedure (e.g., DAPS handover, etc.) according to the indication information, where the source link failure related information can be the link failure related information, the time length information, the first link failure information, or the second link failure information, etc.

[0331] (3) time threshold information indicating whether to record link failure related information;

[0332] As an implementation, if the time length obtained by the user equipment is greater than or equal to the time threshold information, the user equipment records the link failure related information; if the time length obtained by the user equipment is less than the time threshold information, the user equipment does not record the link failure related information. As another implementation, if the time length obtained by the user equipment is greater than or equal to the time threshold information, the user equipment does not record the link failure related information; if the time length obtained by the user equipment is less than the time threshold information, the user equipment records the link failure related information.

[0333] The time length obtained by the user equipment can be the time length information contained in the link failure related information.

[0334] For example, if the time length obtained by the user equipment is the time length experienced by the user equipment from the occurrence of source link failure to the successful access of the target cell by the user equipment, and the time length is less than the time threshold information (which indicates that the communication interruption time before the user equipment accesses the target cell is short), the user equipment can not record the link failure related information; otherwise, if the time length is greater than the time threshold information (which indicates that the communication interruption time before the user equipment accesses the target cell is long), the user equipment records the link failure related information, such as one or more of the first link failure information, the second link failure information, or the time length information.

[0335] Of course, the time length obtained by the user equipment can also be other time lengths obtained by the user equipment.

[0336] Through the first configuration information, the user equipment can not only determine whether to record information about source link failure occurring in the switching process (e.g., DAPS switching, etc.), but also determine whether to record information about other link failures, such as information about switching failure (e.g., DAPS switching failure, etc.), information about wireless link failure (e.g., target link failure, etc.), etc.

[0337] It can be understood that the above can be an example of the first configuration information for the first link failure or the second link failure being a source link failure, and the implementation of the first configuration information can also have many.

[0338] For example, the indication information included in the first configuration information indicating whether to record source link failure related information in the switching process (e.g., DAPS switching, etc.) is only an example, and can also be indication information indicating whether to record other link failure information in the switching process (e.g., DAPS switching, etc.), such as indication information indicating whether to record switching failure (e.g., DAPS switching failure, etc.) information in the switching process, indication information indicating whether to record target link failure related information in the switching process, etc., wherein the switching failure (e.g., DAPS switching failure, etc.) failure information or the target link failure related information can be the above-mentioned link failure related information, time length information, first link failure information, or second link failure information, etc.

[0339] Please continue to refer to Figure 6 The method further includes a step S402 of determining, according to the first configuration information, whether to record information related to link failure reporting.

[0340] For example, whether to record information related to link failure reporting can be determined according to the value of the indication information indicating whether to record link failure related information or the indication information indicating whether to record source link failure related information in the switching process (e.g., DAPS switching, etc.) included in the first configuration information being 1 or 0.

[0341] For another example, whether to record information related to link failure reporting can be determined according to the comparison value of the time threshold information indicating whether to record link failure related information included in the first configuration information and the time length obtained by the user equipment.

[0342] For another example, if the first configuration information includes two or more of the above information, whether to record information related to link failure reporting can be determined according to the combination of the above information.

[0343] Through the above-mentioned link failure configuration method, the user equipment can determine whether to record information related to link failure reporting, thereby effectively controlling the amount of information stored by the user equipment.

[0344] Reference is made to Figure 8 . Figure 8 An interaction schematic diagram of a link failure configuration method provided by an embodiment of the present disclosure is shown. The link failure configuration method can be executed by a user equipment, and the method comprises:

[0345] In step S501, it is determined whether to record information related to link failure reporting according to a default configuration.

[0346] As an implementation form, the default configuration can comprise at least one of the following:

[0347] (1) If the source link failure occurs after the user equipment successfully accesses the target cell of the handover (for example, DAPS handover, etc.), as an implementation form, the user equipment can not record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information; as another implementation form, the user equipment records information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information.

[0348] (2) If the source link failure occurs before the user equipment successfully accesses the target cell, as an implementation form, the user equipment can not record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information; as another implementation form, the user equipment can record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information.

[0349] (3) If the time length obtained by the user equipment (wherein the time length obtained by the user equipment can be the time length information contained in the above-mentioned link failure related information) is less than a preset time threshold value (for example, a default value preset in the standard), the user equipment can not record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information; if the time length obtained by the user equipment is greater than the time threshold value, the user equipment can not record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information; if the time length obtained by the user equipment is less than the time threshold value, the user equipment can record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information; if the time length obtained by the user equipment is greater than the time threshold value, the user equipment can record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information.

[0350] (4) The user equipment always records information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information.

[0351] (5) The user equipment does not record information related to link failure reporting, for example, at least one of the first link failure information, the second link failure information, or the time length information.

[0352] Through the above default configuration, not only can the user equipment determine whether to record information when a source link failure occurs in a handover process (for example, DAPS handover, etc.), but also can help the user equipment determine whether to record information when other link failures occur, such as information when a handover failure (for example, DAPS handover failure, etc.) occurs, information when a radio link failure (for example, target link failure, etc.) occurs, etc.

[0353] It can be understood that the above default configuration is only an example, and there can be many implementations of the default configuration. For example, the source link failure in the above default configuration can be replaced by a target link failure, or a handover failure (for example, DAPS handover failure, etc.), etc. to form other default configurations, which will not be described in detail, and the present disclosure is not limited thereto.

[0354] Through the above configuration method of link failure, the user equipment can determine whether to record information related to link failure reporting, thereby effectively controlling the amount of information stored by the user equipment.

[0355] Please refer to Figure 9 and Figure 10 , Figure 9 a flowchart of a method of link failure reporting provided by an embodiment of the present disclosure is shown. Figure 10 a schematic diagram of interaction of a method of link failure reporting provided by an embodiment of the present disclosure is shown. The method of link failure reporting can be performed by a base station, and the method comprises:

[0356] Step S601, receiving a first link failure report message sent by a user equipment, the first link failure report message being used to inform a base station whether the user equipment stores information related to link failure reporting.

[0357] As an implementation manner, the first link failure report message can be an existing RRC message, for example, one or more of RRCSetupComplete, RRCReestablishmentComplete, RRCResumeComplete, and RRCReconfigurationComplete.

[0358] As another implementation, the first link failure report message can also be a new RRC message. Specifically, the first link failure report message can include at least one of the following information:

[0359] (1) indication information indicating whether to store the link failure related information;

[0360] As an implementation, the indication information can be, for example, rlf-InfoAvailable indication information defined in TS 38.331 or TS 36.331 standards.

[0361] As another implementation, the indication information can include information indicating that the link failure related information has been stored, or information indicating that the link failure related information has not been stored. Specifically, the indication information can be, for example, 0 / 1, where 1 indicates that the link failure related information has been stored, and 0 indicates that the link failure related information has not been stored, and vice versa.

[0362] (2) indication information indicating whether to store the source link failure related information;

[0363] As an implementation, the indication information can be, for example, source RLF information available.

[0364] As another implementation, the indication information can include information indicating that the source link failure related information has been stored, or information indicating that the source link failure related information has not been stored. Specifically, the indication information can be, for example, 0 / 1, where 1 indicates that the source link failure related information has been stored, and 0 indicates that the source link failure related information has not been stored, and vice versa, where the source link failure related information can be, for example, the above-mentioned link failure related information, time length information, first link failure information, or second link failure information, etc.

[0365] The indication information can help the base station obtain at least one of the following information: 1) the user equipment has experienced a source link failure during the handover (e.g., DAPS handover, etc.); or 2) the user equipment has recorded the source link failure related information. Through the indication information, it can be indicated whether the user equipment has stored the source link failure related information during the handover (e.g., DAPS handover, etc.), which is different from the way in which the rlf-InfoAvailable indication information is used to indicate whether to store the link failure related information.

[0366] As an implementation, before step S601, the base station sends second configuration information to the user equipment, the second configuration information being used by the user equipment to determine whether the indication information indicating whether to store the source link failure related information is included in the first link failure report message. According to the second configuration information, the user equipment determines whether the indication information indicating whether to store the source link failure related information is included in the first link failure report message.

[0367] As an implementation, the base station sends second configuration information to the user equipment, the second configuration information including time threshold information, the threshold information being used by the user equipment to determine whether the indication information indicating whether to store the source link failure related information is included in the first link failure report message.

[0368] As an implementation, if the time length obtained by the user equipment (which can be the time length information included in the above-mentioned link failure related information) is greater than the threshold information, the user equipment determines that the indication information indicating whether to store the source link failure related information is included in the first link failure report message; if the time length obtained by the user equipment is less than the threshold information, the user equipment determines that the indication information indicating whether to store the source link failure related information is not included in the first link failure report message.

[0369] As another implementation, if the time length obtained by the user equipment is greater than the threshold information, the user equipment determines that the indication information indicating whether to store the source link failure related information is not included in the first link failure report message; if the time length obtained by the user equipment is less than the threshold information, the user equipment determines that the indication information indicating whether to store the source link failure related information is included in the first link failure report message.

[0370] Specifically, assuming that the time length obtained by the user equipment is the time length experienced by the user equipment from the occurrence of the source link failure to the successful access of the target cell, if the time length is less than the threshold information (which indicates that the time of communication interruption occurring before the user equipment accesses the target cell is short), the user equipment determines that the indication information indicating whether to store the source link failure related information is not included in the first link failure report message; if the time length is greater than the threshold information (which indicates that the time of communication interruption occurring before the user equipment accesses the target cell is long), the user equipment determines that the indication information indicating whether to store the source link failure related information is included in the first link failure report message.

[0371] Step S602, based on the first link failure report message, determining whether to request the user equipment for information related to link failure reporting.

[0372] For example, whether to request the user equipment for the information related to the link failure reporting can be determined according to the indication information included in the first link failure report message and / or the value of the indication information indicating whether to store the source link failure related information is 1 or 0.

[0373] Through the above method of link failure reporting, the base station can know that the user equipment has stored the information related to the link failure reporting, and further, the base station can decide whether to request the user equipment for the stored link failure related information.

[0374] Please refer to Figure 11 and Figure 12 , Figure 11 a flow chart of a method of link failure reporting provided by an embodiment of the present disclosure is shown. Figure 12 a schematic diagram of interaction of a method of link failure reporting provided by an embodiment of the present disclosure is shown. The method of link failure reporting can be performed by a base station, and the method comprises:

[0375] In step S701, a first information request message is sent to a user equipment, and the first information request message is used to request information related to link failure reporting of the user equipment.

[0376] As an implementation manner, the first information request message can comprise at least one of the following information:

[0377] (1) indication information for requesting to report link failure related information;

[0378] The indication information is used to request the user equipment to report the stored link failure related information.

[0379] As an implementation manner, the indication information can be, for example, rlf-ReportReq in the UEInformationRequest message in the standard TS38.331.

[0380] As another implementation, the indication information can be a new indication information requesting the user equipment to report the link failure related information, which can include information related to all the link failures. For example, if the user equipment stores information related to two link failures (e.g., a first link failure and a second link failure), the indication information indicates the user equipment to report the link failure related information related to the two link failures, such as the first link failure information, the second link failure information, and the time length information. For another example, if the user equipment stores information related to three link failures (e.g., a first link failure, a second link failure, and a third link failure), the indication information indicates the user equipment to report the link failure related information related to the three link failures, such as the first link failure information, the second link failure information, the third link failure information, and the time length information.

[0381] (2) the indication information requesting to report the source link failure related information;

[0382] The indication information is used to request the user equipment to report the source link failure related information stored by the user equipment, where the source link failure related information can be the link failure related information, the time length information, the first link failure information, or the second link failure information, etc. As an implementation, the source link failure is a source link failure occurred by the user equipment during the switching (e.g., DAPS switching, etc.).

[0383] (3) the indication information requesting to report the target link failure related information;

[0384] The indication information is used to request the user equipment to report the target link failure related information stored by the user equipment, where the target link failure related information can be the link failure related information, the time length information, the first link failure information, or the second link failure information, etc. As an implementation, the target link failure is a target link failure occurred by the user equipment during the switching (e.g., DAPS switching, etc.).

[0385] (4) the indication information requesting to report the switching failure related information.

[0386] The indication information is used to request the user equipment to report the switching failure related information stored by the user equipment, where the switching failure related information can be the first link failure information or the second link failure information, etc. As an implementation, the switching failure is a failure occurred by the user equipment when accessing the target cell during the switching (e.g., DAPS switching, etc.).

[0387] Through the above steps, the base station can request the user equipment for the link failure related information, the user equipment can provide the base station with the information related to one or more link failures detected by the user equipment; when the user equipment performs switching (for example, DAPS switching, etc.), the base station can obtain the information related to one or more link failures detected by the base station in the switching process. When the user equipment performs switching (for example, DAPS switching, etc.), if only a source link failure occurs, the base station can obtain the source link failure related information.

[0388] In step S702, the first information sent by the user equipment is received, and the first information is used to inform the base station of the information related to the link failure reporting.

[0389] As an implementation form, the first information can include at least one of the following information:

[0390] (1) link failure related information;

[0391] The link failure related information can be a source link failure, a target link failure, a switching failure (for example, DAPS switching failure, etc.), etc. For details of the link failure related information, refer to the description above, which will not be repeated here.

[0392] (2) first link failure information or second link failure information;

[0393] The first link failure information or the second link failure information can be a source link failure, a target link failure, a switching failure (for example, DAPS switching failure, etc.), etc. For details of the first link failure information or the second link failure information, refer to the description above, which will not be repeated here.

[0394] (3) identification information of a reestablishment cell;

[0395] The identification information of the reestablishment cell can be, for example, NR CGI, and / or PCI, and / or carrier frequency, etc. The information indicates the cell in which the user equipment is located when performing cell reestablishment (for example, when sending a reestablishment request message). The reestablishment cell is the reestablishment cell group performed by the user equipment after the link failure.

[0396] (4) time length information experienced after the link failure;

[0397] The information is used to indicate the time length experienced by the user equipment from the occurrence of the link failure to the sending of the first information by the user equipment.

[0398] As an implementation form, the time length can be, for example, the time length experienced from the occurrence of the source link failure to the sending of the first information by the user equipment in the switching process (for example, DAPS switching, etc.).

[0399] As another implementation, the time length may, for example, be a time length experienced from occurrence of a target link failure (or a handover failure (e.g., DAPS handover failure), etc.) to the user equipment sending the first information during a handover (e.g., DAPS handover, etc.).

[0400] As yet another implementation, the time length may, for example, be timeSinceFailure in the standard TS 38.331.

[0401] (5) time length information experienced for successfully accessing the network;

[0402] wherein the information is used to indicate a time length experienced by the user equipment from occurrence of a link failure to the user equipment accessing a cell;

[0403] As an implementation, the time length may, for example, be a time length experienced from occurrence of a source link failure to the user equipment accessing a cell during a handover (e.g., DAPS handover, etc.).

[0404] As another implementation, the time length may, for example, be a time length experienced from occurrence of a target link failure (or a handover failure (e.g., DAPS handover failure), etc.) to the user equipment accessing a cell during a handover (e.g., DAPS handover, etc.).

[0405] (6) indication information indicating a link failure type;

[0406] wherein the type indicated by the indication information may, for example, include: a source link failure during a handover (e.g., DAPS handover, etc.), a target link failure during a handover (e.g., DAPS handover, etc.), a handover failure (e.g., DAPS handover failure, etc.), etc.

[0407] (7) time length information from a source link failure to the user equipment successfully accessing a target cell;

[0408] (8) time length information from a source link failure to a target link failure;

[0409] (9) time length information from a source link failure to a handover failure (e.g., DAPS handover failure, etc.);

[0410] (10) time length information from the user equipment successfully accessing a target cell to a source link failure;

[0411] (11) time length information from a target link failure to a source link failure;

[0412] (12) time length information from a handover failure (e.g., DAPS handover failure, etc.) to a source link failure;

[0413] (13) an interval time between the source link failure and the target link failure (or a handover failure (e.g., a DAPS handover failure, etc.));

[0414] (14) time length information of a user equipment communication interruption;

[0415] (15) time length information from the initialization of the handover to the successful access to the target cell;

[0416] (16) time length information from the initialization of the handover to the occurrence of the source link failure;

[0417] (17) indication information that the source link failure occurs before the successful access of the user equipment to the target cell;

[0418] (18) indication information that the source link failure occurs after the successful access of the user equipment to the target cell.

[0419] As another above-mentioned manner, if only the source link failure occurs in the process of the handover (e.g., a DAPS handover, etc.) of the user equipment, the first information sent by the user equipment can include at least one of the following information:

[0420] (1) source link failure related information;

[0421] The source link failure related information can be, for example, the above-mentioned link failure related information, time length information, first link failure information, or second link failure information, etc.

[0422] (2) indication information indicating that the link failure type is the source link failure in the handover (e.g., a DAPS handover, etc.);

[0423] (3) indication information indicating that the cell where the link failure occurs is the source cell in the handover (e.g., a DAPS handover, etc.);

[0424] (4) identification information of the cell where the link failure occurs, i.e., identification information of the source cell in the handover (e.g., a DAPS handover, etc.);

[0425] (5) time length information from the source link failure to the successful access of the user equipment to the target cell;

[0426] (6) time length information from the initialization of the handover to the successful access of the user equipment to the target cell;

[0427] (7) time length information from the initialization of the handover to the occurrence of the source link failure.

[0428] As an implementation manner, please refer to Figure 13 The above-mentioned link failure reporting method can further include: a step S703 of performing network parameter configuration according to the first information.

[0429] As another implementation, please refer to Figure 14 The method for reporting the link failure can further include: transmitting the information included in the first information to another base station to cause the another base station to configure network parameters.

[0430] Through the method for reporting the link failure, the base station can request the user equipment for information related to the reporting of the link failure, the user equipment can provide the base station with information related to one or more link failures detected by the user equipment; when the user equipment performs switching (for example, DAPS switching, etc.), the base station can obtain information related to one or more link failures detected by the base station during the switching; when the user equipment performs switching (for example, DAPS switching, etc.), if only a source link failure occurs, the base station can obtain information related to the reporting of the link failure; the base station can set network parameters according to the received first information or forward the received first information to other base stations; further, the base station can determine whether a source link failure occurs during the switching (for example, DAPS switching, etc.) performed by the user equipment, a time of a communication interruption of the user equipment caused by the source link failure, etc., according to the information, the base station can know whether the parameters of the switching (for example, DAPS switching, etc.) set by the base station are appropriate, whether the target cell of the switching selected by the base station is appropriate, etc., thereby helping the base station to optimize the configuration of the switching parameters.

[0431] It can be understood that in the method for reporting the link failure, step S701 can be omitted, that is, the user terminal can actively transmit the first information to the base station without receiving the first information request message transmitted by the base station.

[0432] Please refer to Figure 15 , Figure 15 A flowchart of a method for reporting a link failure is shown, the method for reporting the link failure can be performed by a user equipment, and the method includes:

[0433] Step S801: receiving a first information request message transmitted by a base station, the first information request message being used to request information related to the reporting of a link failure of the user equipment.

[0434] Step S802: transmitting first information to the base station, the first information being used to notify the base station of the information related to the reporting of the link failure.

[0435] If the first information request message transmitted by the base station requests information related to the reporting of the link failure of the user equipment which is not stored by the user equipment, the user equipment can ignore the first information request message and not transmit the first information.

[0436] It can be understood that in the above method of reporting link failure, step S801 can be omitted, that is, the user terminal can actively send the first information to the base station without receiving the first information request message sent by the base station.

[0437] Wherein, the similar parts as in the previous embodiment are not repeated.

[0438] Through the above method, the base station can request the user equipment for information related to link failure reporting, and the user equipment can provide the base station with information related to one or more link failures detected by the user equipment; when the user equipment performs handover (such as DAPS handover, etc.), the base station can obtain information related to one or more link failures detected by the base station during the handover process; when the user equipment performs handover (such as DAPS handover, etc.), if only a source link failure occurs, the base station can obtain information of the source link failure; the base station can set network parameters according to the received information or forward the received information to other base stations; further, the base station can determine whether a source link failure occurs during the handover (such as DAPS handover, etc.) process of the user equipment, the time of the user communication interruption caused by the source link failure, etc., according to these information, the base station can know whether the parameters of the handover (such as DAPS handover, etc.) set by it are appropriate, whether the target cell of the handover selected by it is appropriate, etc., thereby helping the base station to optimize the handover parameter configuration.

[0439] Please refer to Figure 16 , Figure 17 and Figure 18 , Figure 16 Fig. 1 shows a flowchart of a link failure information forwarding method provided by an embodiment of the present disclosure, Figure 17 Fig. 2 shows an interaction schematic diagram between a first base station and a second base station in a link failure information forwarding method provided by an embodiment of the present disclosure, Figure 18 Fig. 3 shows an interaction schematic diagram between a second base station and a third base station in a link failure information forwarding method provided by an embodiment of the present disclosure. The link failure information forwarding method can be executed by the second base station, and the method comprises:

[0440] Step S901, receiving a first failure indication message sent by a first base station, the first failure indication message being used to notify the second base station of information related to link failure reporting of a user equipment or information related to reestablishment.

[0441] The content contained in the first failure indication message may be, for example, a Failure Indication message in the standard TS 38.331, or an RLF Indication message in the standard TS 36.331, or a Handover Report message in the standards TS 38.423 and TS 36.423, or a newly defined message as follows.

[0442] As one of the above-mentioned manners, the first failure indication message may further include at least one of the following information:

[0443] (1) Information related to the reporting of the link failure of the user equipment, the content of which may refer to at least one of the above-mentioned link failure related information, time length information, first link failure information, or second link failure information;

[0444] (2) Source link failure related information, the content of which may refer to at least one of the above-mentioned link failure related information, time length information, first link failure information, or second link failure information;

[0445] (3) Target link failure related information, the content of which may refer to at least one of the above-mentioned link failure related information, time length information, first link failure information, or second link failure information;

[0446] (4) Information related to the handover failure (e.g., DAPS handover failure, etc.), the content of which may refer to at least one of the above-mentioned link failure related information, time length information, first link failure information, or second link failure information;

[0447] (5) Indicating information indicating that the source link failure is a handover (e.g., DAPS handover, etc.) link failure;

[0448] (6) Indicating information indicating that the cell where the link failure occurs is the source cell of the handover (e.g., DAPS handover, etc.);

[0449] (7) Indicating information indicating the time when the source link failure occurs, for example, indicating that the source link failure occurs before successfully accessing the target cell, or indicating that the source link failure occurs after successfully accessing the target cell;

[0450] (8) Identification information of the cell where the link failure occurs, for example, identification information of the source cell of the handover (e.g., DAPS handover, etc.);

[0451] (9) Time length information from the source link failure to the successful access of the user equipment to the target cell, which may help the second base station to know the time length of the communication interruption experienced by the user equipment in the handover process;

[0452] (10) Time length information from the initialization of the handover to the successful access to the target cell, which can help the second base station to know the time length of the communication interruption experienced by the user equipment in the handover process;

[0453] (11) Time length information from the initialization of the handover to the occurrence of the source link failure, which can help the second base station to know the time length of the communication interruption experienced by the user equipment in the handover process.

[0454] As a specific embodiment, for the case that the user equipment only detects the source link failure in the handover (e.g., DAPS handover, etc.) process, the second base station is the base station where the target cell of the user equipment in the handover (e.g., DAPS handover, etc.) process is located, and the first base station is the base station where the source cell of the user equipment in the handover (e.g., DAPS handover, etc.) process is located, the first failure indication message can include at least one of the following information:

[0455] (1) Source link failure related information, the content of which can be referred to at least one of the above link failure related information, time length information, first link failure information, or second link failure information;

[0456] (2) Indicating information indicating that the link failure type is the source link failure in the handover (e.g., DAPS handover, etc.);

[0457] (3) Indicating information indicating that the cell where the link failure occurs is the source cell in the handover (e.g., DAPS handover, etc.);

[0458] (4) Indicating information indicating the time when the source link failure occurs, for example, indicating that the source link failure occurs before the successful access to the target cell, or indicating that the source link failure occurs after the successful access to the target cell;

[0459] (5) Identification information of the cell where the link failure occurs, for example, identification information of the source cell in the handover (e.g., DAPS handover, etc.);

[0460] (6) Time length information from the source link failure to the successful access to the target cell by the user equipment;

[0461] (7) Time length information from the initialization of the handover to the successful access to the target cell;

[0462] (8) Time length information from the initialization of the handover to the occurrence of the source link failure.

[0463] As another specific embodiment, for the case that the user equipment only detects the target link failure or the handover failure (e.g., DAPS handover failure) during the handover (e.g., DAPS handover, etc.), the content contained in the first failure indication message can be, for example, the Failure Indication message in the standard TS 38.331 or the RLF Indication message in the standard TS 36.331, but the link failure related information contained in the first failure indication message can refer to at least one of the above-mentioned link failure related information, time length information, first link failure information, or second link failure information.

[0464] Through the above method, other base stations can obtain the information related to the link failure reported by the user equipment; the base station can know the information related to the source link failure occurred during the handover (e.g., DAPS handover, etc.); the base station can optimize the parameter setting during the handover (e.g., DAPS handover, etc.), and / or the selection of the target cell, and / or whether to use DAPS handover, etc. Further, the base station can determine whether the source link failure occurred during the handover (e.g., DAPS handover, etc.) of the user equipment, the time of the communication interruption of the user equipment caused by the source link failure, etc. According to these information, the base station can know whether the parameters of the handover (e.g., DAPS handover, etc.) it sets are appropriate, whether the target cell of the handover (e.g., DAPS handover, etc.) it selects is appropriate, etc., thereby helping the base station to optimize the parameter configuration of the handover (e.g., DAPS handover, etc.).

[0465] Further, in actual situations, when the second base station receives the first failure indication message sent by the first base station, the second base station is not the base station causing the link failure, so the second base station can process the first failure indication message, determine the cause of the link failure, and generate a first handover report message and send it to the third base station.

[0466] In one specific embodiment, when the second base station receives the first failure indication message, it can determine that the cause of the link failure is too early handover, too late handover, handover to wrong cell, etc., and then it can send these cause information and part or all of the information contained in the first failure indication message to the third base station, and finally the third base station solves the problem of link failure, such as adjusting the handover parameters.

[0467] Please continue to see Figure 11The method for forwarding the link failure information can further include: sending, to the third base station, a first handover report message, the first handover report being used by the second base station to inform the third base station of information related to reporting of link failure or information related to reestablishment.

[0468] The first handover report message can be a HandoverReport message in standards TS38.423 and TS36.423, a Failure Indication message in standard TS38.331, or an RLFIndication message in TS36.331, or a newly defined message.

[0469] As an implementation form, the first handover report message can include at least one of the following:

[0470] (1) indication information of a link failure type, the indicated type for example including source link failure in a handover (for example, DAPS handover, etc.) process, target link failure in a handover (for example, DAPS handover, etc.) process, handover failure, handover too early, handover too late, handover to an error cell, etc.;

[0471] (2) indication information indicating occurrence of source link failure, the indication information being used to inform the third base station that the user equipment has occurred source link failure when performing handover (for example, DAPS handover, etc.);

[0472] (3) information related to link failure of the user equipment, for example, the above-mentioned link failure related information, time length information, first link failure information, or second link failure information, etc.;

[0473] (4) source link failure related information, for example, the above-mentioned link failure related information, time length information, first link failure information, or second link failure information, etc.;

[0474] (5) target link failure related information, for example, the above-mentioned link failure related information, time length information, first link failure information, or second link failure information, etc.;

[0475] (6) information related to handover failure (for example, DAPS handover failure, etc.), for example, the above-mentioned link failure related information, time length information, first link failure information, or second link failure information, etc.;

[0476] (7) information related to mobility,

[0477] The information is used to indicate the configuration information used by the user equipment when switching, for example, the information sent by the source base station to the target base station when the user equipment switches; further, the mobility-related information can be information related to switching (e.g., DAPS switching, etc.), which is used to indicate the configuration information used by the user equipment when switching (e.g., DAPS switching, etc.), which can be, for example, the information sent by the source base station to the target base station when the user equipment switches.

[0478] (8) Indicating information indicating that the source link failure type is switching (e.g., DAPS switching, etc.);

[0479] (9) Indicating information indicating that the cell where the link failure occurs is the source cell when switching (e.g., DAPS switching, etc.);

[0480] (10) Indicating information indicating the time when the source link failure occurs, for example, indicating that the source link failure occurs before successfully accessing the target cell, or indicating that the source link failure occurs after successfully accessing the target cell;

[0481] (11) Identification information of the cell where the link failure occurs, i.e., identification information of the source cell when switching (e.g., DAPS switching, etc.);

[0482] (12) Time length information from the source link failure to the successful access of the target cell by the user equipment, which can help the third base station to know the time length of the communication interruption experienced by the user equipment during switching;

[0483] (13) Time length information from the initialization of switching to the successful access of the target cell, which can help the third base station to know the time length of the communication interruption experienced by the user equipment during switching;

[0484] (14) Time length information from the initialization of switching to the occurrence of the source link failure, which can help the third base station to know the time length of the communication interruption experienced by the user equipment during switching;

[0485] (15) Information contained in the Handover Report in TS38.423 and TS36.423.

[0486] Through the above method, the other base station can obtain the information about the link failure reported by the user equipment; the base station can obtain the information about the source link failure occurring in the handover (for example, DAPS handover, etc.) process; the base station can optimize the parameter setting in the handover (for example, DAPS handover, etc.) process, and / or the selection of the target cell, and / or whether to use DAPS handover, etc. Further, the base station can determine whether the source link failure occurs in the handover (for example, DAPS handover, etc.) process of the user equipment, the time of the communication interruption of the user equipment caused by the source link failure, etc. According to the information, the base station can know whether the parameters of the handover (for example, DAPS handover, etc.) set by it are appropriate, whether the target cell of the handover (for example, DAPS handover, etc.) selected by it is appropriate, etc., thereby helping the base station to optimize the parameter configuration of the handover (for example, DAPS handover, etc.).

[0487] Reference is made to Figure 19 and Figure 20 , Figure 19 A flowchart of a method for reporting a link failure provided by an embodiment of the present disclosure is shown, Figure 20 A schematic diagram of the interaction of a method for reporting a link failure provided by an embodiment of the present disclosure is shown. The method for reporting a link failure can be performed by a first base station, and the method comprises:

[0488] In step S1001, a first user information reporting message sent by a user equipment is received, and the first user information reporting message comprises source link failure related information.

[0489] As an implementation manner, the first base station can be, for example, a base station where a target cell for the user equipment to perform handover is located.

[0490] As an implementation manner, the first user information reporting message can be, for example, an RRC message, such as RRCReconfigurationComplete in the standard TS38.331 or TS36.331, or other existing RRC messages.

[0491] As another implementation manner, the first user information reporting message can be a newly defined RRC message. Specifically, the first user information reporting message can comprise at least one of the following, for example:

[0492] (1) indication information of the occurrence of the source link failure;

[0493] (2) link failure related information, which can refer to the above-mentioned link failure related information, time length information, first link failure information and / or second link failure information;

[0494] (3) indication information of the time of the occurrence of the source link failure;

[0495] As an implementation form, the indication information can be, for example, that the source link failure occurs before the successful access to the target cell; as another implementation form, the indication information can be, for example, that the source link failure occurs after the successful access to the target cell, where the successful access to the target cell can be, for example, the successful completion of the random access procedure in the target cell, or the sending of the RRCReconfigurationComplete message by the user equipment to the base station, and the like.

[0496] (4) Time length information from the source link failure to the successful access of the user equipment to the target cell, which can help the first base station to know the time length of the communication interruption experienced by the user equipment in the handover process;

[0497] (5) Time length information from the initialization of the handover to the successful access to the target cell, which can help the first base station to know the time length of the communication interruption experienced by the user equipment in the handover process;

[0498] (6) Time length information from the initialization of the handover to the occurrence of the source link failure, which can help the first base station to know the time length of the communication interruption experienced by the user in the handover process;

[0499] (7) Time length information of the communication interruption of the user equipment.

[0500] In the above manner, the first base station can know that the user equipment has occurred the source link failure, and further, the first base station can not need to send the indication information for releasing the source link to the user equipment.

[0501] Step S1002, sending a first user information forwarding message to the second base station, where the first user information forwarding message is used for the first base station to inform the second base station of the source link failure related information.

[0502] As an implementation form, the second base station can be, for example, the source base station when the user equipment performs the handover.

[0503] As an implementation form, the first user information forwarding message can contain the same information content as the first user information reporting message.

[0504] As an implementation form, the first user information forwarding message can be, for example, the Failure Indication message in the standard TS38.331, the RLF Indication message in the standard TS36.331, the HO Success message, or other existing messages of the X2 / Xn interface, and the like.

[0505] As another implementation, the first user information forwarding message can also be a message of the new X2 / Xn interface. Specifically, the first user information forwarding message can include at least one of the following information:

[0506] (1) indication information of releasing the source link, which is used to inform the second base station that the user configuration can be released and / or the communication with the user can be stopped

[0507] (2) indication information of the occurrence of the source link failure;

[0508] (3) link failure related information, which can refer to the above-mentioned link failure related information, the first link failure information and / or the second link failure information;

[0509] (4) indication information of the time of the occurrence of the source link failure;

[0510] One embodiment of the indication information is that the source link failure occurs before the successful access to the target cell, and another embodiment is that the source link failure occurs after the successful access to the target cell. One example of the successful access to the target cell is the successful completion of the random access procedure in the target cell, and another example is that the user sends the RRCReconfigurationComplete message to the base station;

[0511] (5) time length information from the source link failure to the successful access to the target cell, which can help the second base station to know the time length of the communication interruption experienced by the user equipment in the handover process;

[0512] (6) time length information from the initialization of the handover to the successful access to the target cell, which can help the second base station to know the time length of the communication interruption experienced by the user equipment in the handover process;

[0513] (7) time length information from the initialization of the handover to the occurrence of the source link failure, which can help the second base station to know the time length of the communication interruption experienced by the user equipment in the handover process;

[0514] (8) time length information of the communication interruption of the user equipment.

[0515] It can be understood that in the handover mechanism of the present disclosure, the source link failure can occur during the handover (e.g., DAPS handover) of the user equipment, and the user equipment successfully accesses the target cell. Specifically, it is further divided into two cases: 1) the source link failure occurs before the user equipment successfully accesses the target cell, and 2) the source link failure occurs after the user equipment successfully accesses the target cell. In the above two cases, the method of reporting the link failure can help the base station to know that the source link failure of the user equipment has occurred.

[0516] Further, the method for reporting the link failure can help the base station obtain the source link failure related information, and can help the base station configure the parameters for switching of the user equipment. For example, if the second base station learns that the user equipment has the source link failure, and learns the time length information from the source link failure to the user equipment accessing the target cell, the second base station can determine whether the user has the communication interruption in the switching process (for example, DAPS switching, etc.), and further can determine the time length of the communication interruption of the user equipment, thereby helping the second base station to determine the parameter setting of the switching (for example, DAPS switching, etc.), or the selection of the target cell, etc.

[0517] It can be understood that the above various embodiments can be combined for use, and when the various embodiments are combined, some steps in the various embodiments can be omitted or deleted, and the steps in the various embodiments are not limited when combined, and any combined manner belongs to the protection scope of the present application. The following is described with a specific example.

[0518] Please refer to Figure 21 , Figure 21 A timing diagram of a method for reporting a link failure provided by an embodiment of the present disclosure is shown, which can include:

[0519] Step S1101, the user equipment detects a link failure.

[0520] Step S1102, the user equipment records information related to reporting of the link failure.

[0521] Step S1103, a first link failure report message sent by the user equipment is received, and the first link failure report message is used to notify the base station whether the user equipment stores the information related to reporting of the link failure.

[0522] Step S1104, in response to the first link failure report message, the first base station determines whether to request the information related to reporting of the link failure from the user equipment.

[0523] Step S1105, the first base station sends a first information request message to the user equipment, and the first information request message is used to request the information related to reporting of the link failure.

[0524] Step S1106, the first base station receives first information sent by the user equipment, and the first information is used to notify the base station the information related to reporting of the link failure.

[0525] Step S1107, the first base station sends a first failure indication message to the second base station, and the first failure indication message is used for the first base station to notify the second base station the information related to reporting of the link failure of the user equipment or the information related to reestablishment.

[0526] In step S1108, the second base station sends a first handover report message to the third base station, where the first handover report is used to inform the third base station of the information related to the link failure reporting or the information related to the reestablishment.

[0527] The detailed implementation of each step can refer to the description of each step in the foregoing embodiments, which will not be repeated here. In addition, the order between the steps can be changed, and the steps are not necessarily required, for example, some steps can not be performed in the actual system.

[0528] Through the above method, the user equipment can determine whether to record the information related to the link failure reporting detected by the user equipment; the user equipment can indicate to the network side that it has stored the information related to the link failure reporting; the base station can request the user equipment for the information related to the link failure reporting; the user equipment can provide the base station with the information related to the link failure reporting; after receiving the information related to the link failure reporting from the user equipment, the base station can adjust the network parameter configuration or the user equipment handover configuration; after receiving the information related to the link failure reporting, the base station can forward it to other base stations.

[0529] In addition, the link failure can be a radio link failure, a handover failure (for example, a DAPS handover failure), a source link failure during a handover (for example, a DAPS handover), a target link failure during a handover (for example, a DAPS handover), or other types of link failures.

[0530] Further, through the above method, the base station can determine whether the source link failure occurs during the handover (for example, a DAPS handover) of the user equipment, the time of the communication interruption of the user equipment caused by the source link failure, and the like. According to the information, the base station can know whether the parameters of the handover (for example, a DAPS handover) set by the base station are appropriate, whether the target cell of the handover (for example, a DAPS handover) selected by the base station is appropriate, and the like, thereby helping the base station to optimize the handover parameter configuration of the handover (for example, a DAPS handover).

[0531] Figure 22 is a block diagram illustrating the structure of the user terminal 1200 according to an embodiment of the present disclosure.

[0532] Reference Figure 22The user terminal 1200 includes a transceiver 1201 and a processor 1202. The transceiver 1201 is configured to transmit and receive a signal to and from the outside. The processor 1202 is configured to perform the above-described link failure reporting method, the link failure configuration method, or the method of recording link failure-related information. The user terminal 1200 can be implemented in the form of hardware, software, or a combination of hardware and software to enable it to perform the above-described link failure reporting method, the link failure configuration method, or the method of recording link failure-related information described in the disclosure.

[0533] Figure 21 is a block diagram illustrating a structure of a base station 1300 according to an embodiment of the disclosure.

[0534] Referring to Figure 21 The base station 1300 includes a transceiver 1301 and a processor 1302. The transceiver 1301 is configured to transmit and receive a signal to and from the outside. The processor 1302 is configured to perform the above-described link failure reporting method or the link failure information forwarding method. The base station 1300 can be implemented in the form of hardware, software, or a combination of hardware and software to enable it to perform the above-described link failure reporting method or the link failure information forwarding method described in the disclosure.

[0535] At least one embodiment of the disclosure also provides a non-transitory computer-readable recording medium having stored thereon a program for executing the above-described method when executed by a computer.

[0536] Various embodiments of the disclosure can be implemented as computer-readable codes on a specific recording medium, which are specifically realized in a computer-readable recording medium. The computer-readable recording medium is any data storage device that can store data readable by a computer system. Examples of the computer-readable recording medium can include a read-only memory (ROM), a random access memory (RAM), a compact disc-read only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, a carrier wave (e.g., data transmission via the Internet), and the like. The computer-readable recording medium can be distributed over network-coupled computer systems so that the computer-readable code is stored and executed in a distributed manner. Moreover, functional programs, codes, and code segments for implementing various embodiments of the disclosure can be easily construed by those skilled in the art to which the disclosure pertains.

[0537] It will be understood that the embodiments of the present disclosure can be implemented in the form of hardware, software or a combination of hardware and software. The software can be stored as program instructions or computer readable codes executable on a processor on a non-transitory computer readable medium. Examples of the non-transitory computer readable recording medium include magnetic storage media (e.g., ROM, floppy disks, hard disks, etc.) and optical recording media (e.g., CD-ROMs, Digital Video Discs (DVDs), etc.). The non-transitory computer readable recording medium can also be distributed over network-coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. The medium can be read by a computer, stored in a memory, and executed by a processor. Various embodiments can be implemented by a computer or a portable terminal including a controller and a memory, and the memory can be an example of a non-transitory computer readable recording medium suitable for storing a program(s) having instructions for implementing embodiments of the present disclosure. The present disclosure can be implemented by a program having a code for specifically implementing the apparatus and method described in the claims, which is stored in a machine (or computer) readable storage medium. The program can be electronically carried on any medium, such as a communication signal transmitted via a wired or wireless connection, and the present disclosure suitably includes its equivalents.

[0538] The above-described embodiments are merely specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto, and those skilled in the art, within the technical scope disclosed by the present disclosure, can make various changes or substitutions, and these changes or substitutions should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be construed as the scope of protection of the claims.

[0539] Embodiments of the present disclosure also disclose:

[0540] (1) A method of reporting a link failure performed by a user equipment, the method comprising:

[0541] transmitting first information to a first base station, the first information being used to inform the base station of information related to reporting of a link failure.

[0542] (2) The method of (1), wherein,

[0543] receiving a first information request message transmitted by the first base station, the first information request message being used to request information related to reporting of a link failure.

[0544] (3) The method of (2), wherein, the first information request message comprises at least one of the following information:

[0545] indication information for requesting reporting of link failure related information, wherein the link failure related information comprises at least one of first link failure information, second link failure information, or time length information.

[0546] indication information for requesting reporting of source link failure related information;

[0547] indication information for requesting reporting of target link failure related information;

[0548] indication information for requesting reporting of handover failure related information.

[0549] (4) The method of (1), wherein the first information comprises at least one of:

[0550] link failure related information, wherein the link failure related information comprises at least one of first link failure information, second link failure information, or time length information;

[0551] first link failure information or second link failure information;

[0552] identification information of a reestablishment cell;

[0553] time length information of a time period experienced after link failure;

[0554] time length information of a time period experienced for successfully accessing a network;

[0555] indication information indicating a link failure type;

[0556] time length information from source link failure to successful access of a target cell by the user equipment;

[0557] time length information from source link failure to target link failure;

[0558] time length information from source link failure to handover failure;

[0559] time length information from successful access of a target cell by the user equipment to source link failure;

[0560] time length information from target link failure to source link failure;

[0561] time length information from handover failure to source link failure;

[0562] interval time between source link failure and target link failure;

[0563] time length information of a time period of communication interruption of the user equipment;

[0564] time length information from initiation of handover to successful access of a target cell;

[0565] time length information from initiation of handover to occurrence of source link failure;

[0566] Indication information indicating that source link failure occurs before the user equipment successfully accesses the target cell;

[0567] Indication information indicating that source link failure occurs after the user equipment successfully accesses the target cell.

[0568] (5) The method of (1), wherein the first information comprises at least one of the following information:

[0569] Source link failure related information;

[0570] Indication information indicating that the source link failure is a handover type link failure;

[0571] Indication information indicating that the cell where the link failure occurs is the source cell in handover;

[0572] Identification information of the cell where the link failure occurs;

[0573] Time length information from source link failure to successful access of the target cell by the user equipment;

[0574] Time length information from handover initialization to successful access of the target cell;

[0575] Time length information from handover initialization to the occurrence of source link failure.

[0576] (6) The method of (1), further comprising:

[0577] Receiving first configuration information sent by the first base station, wherein the first configuration information is used by the user equipment to determine whether to record information related to link failure reporting.

[0578] According to the first configuration information, it is determined whether to record information related to link failure reporting.

[0579] (7) The method of (6), wherein the first configuration information comprises at least one of the following information:

[0580] Indication information indicating whether to record link failure related information;

[0581] Indication information indicating whether to record source link failure related information in the handover process;

[0582] Time threshold information indicating whether to record link failure related information.

[0583] (8) The method of (6), further comprising:

[0584] According to the default configuration, it is determined whether to record information related to link failure reporting.

[0585] (9) The method of (6), wherein the default configuration is configured based on time or time length information of source link failure occurrence.

[0586] (10) The method of (6), further comprising:

[0587] detecting a link failure;

[0588] recording information related to link failure reporting.

[0589] (11) The method of (10), wherein recording information related to link failure reporting comprises recording link failure related information, wherein the link failure related information comprises at least one of first link failure information, second link failure information, or time length information.

[0590] (12) The method of (11), wherein the first link failure or the second link failure comprises source link failure, target link failure, or handover failure.

[0591] (13) The method of (11), wherein the first link failure information comprises at least one of:

[0592] measurement information of a cell acquired by the user equipment when the first link failure occurs;

[0593] first identification information of the user equipment;

[0594] identification information of a cell in which a handover command is received before the first link failure;

[0595] indication information of a cell in which the first link failure occurs;

[0596] identification information of a cell in which the first link failure occurs;

[0597] indication information of a time when the first link failure occurs;

[0598] indication information of a first link failure type;

[0599] reason information of the first link failure;

[0600] identification information of a target cell of handover;

[0601] indication information of a handover type.

[0602] (14) The method of (11), wherein the time length information comprises at least one of:

[0603] time length information of a time experienced from handover initialization to occurrence of the first link failure.

[0604] information of a length of time elapsed from the handover initialization to the occurrence of the second link failure;

[0605] information of a length of time elapsed from the occurrence of the first link failure to the occurrence of the second link failure;

[0606] information of a length of time elapsed from the successful access to the target cell of the handover to the occurrence of the first link failure;

[0607] information of a length of time elapsed from the successful access to the target cell of the handover to the occurrence of the second link failure;

[0608] a length of time elapsed from the occurrence of the first link failure to the successful access to a cell;

[0609] a length of time elapsed from the occurrence of the second link failure to the successful access to a cell;

[0610] information of a length of time elapsed from the reception of the handover command to the successful access to the target cell of the handover;

[0611] information of a length of time of the interruption of the communication with the source cell of the handover.

[0612] (15) A method of link failure reporting performed by a first base station, further comprising:

[0613] receiving first information transmitted by a user equipment, the first information including information related to link failure reporting.

[0614] (16) The method of (15), further comprising:

[0615] transmitting a first information request message to the user equipment, the first information request message being used to request information related to link failure reporting.

[0616] (17) The method of (16), wherein the first information request message includes at least one of:

[0617] indication information requesting reporting of link failure related information, wherein the link failure related information includes at least one of first link failure information, second link failure information, or information of a length of time;

[0618] indication information requesting reporting of source link failure related information;

[0619] indication information requesting reporting of target link failure related information;

[0620] indication information requesting reporting of handover failure related information.

[0621] (18) The method of (15), wherein the first information includes at least one of:

[0622] link failure related information, wherein the link failure related information comprises at least one of first link failure information, second link failure information, or time length information;

[0623] first link failure information or second link failure information;

[0624] identification information of the reestablished cell;

[0625] time length information of a time period experienced after the link failure;

[0626] time length information of a time period experienced for successfully accessing the network;

[0627] indication information indicating a link failure type;

[0628] time length information from a source link failure to successful access of a target cell by the user equipment;

[0629] time length information from the source link failure to a target link failure;

[0630] time length information from the source link failure to a handover failure;

[0631] time length information from successful access of the target cell by the user equipment to the source link failure;

[0632] time length information from the target link failure to the source link failure;

[0633] time length information from the handover failure to the source link failure;

[0634] interval time between the source link failure and the target link failure;

[0635] time length information of a time period of communication interruption of the user equipment;

[0636] time length information from initiation of the handover to successful access of the target cell;

[0637] time length information from initiation of the handover to occurrence of the source link failure;

[0638] indication information that the source link failure occurs before successful access of the target cell by the user equipment;

[0639] indication information that the source link failure occurs after successful access of the target cell by the user equipment.

[0640] (19) The method of (15), wherein the first information comprises at least one of:

[0641] source link failure related information;

[0642] indication information indicating that the link failure type is a source link failure at handover;

[0643] indication information indicating that the cell where the link failure occurs is a source cell at handover;

[0644] identification information of the cell where the link failure occurs;

[0645] time length information from the source link failure to successful access of the target cell by the user equipment;

[0646] time length information from the initialization of handover to the successful access of the target cell;

[0647] time length information from the initialization of handover to the source link failure.

[0648] (20) The method of (15), further comprising:

[0649] receiving a first link failure report message sent by the user equipment, the first link failure report message being used to inform the base station whether the user equipment stores information related to link failure reporting;

[0650] determining whether to request the user equipment for information related to link failure reporting based on the first link failure report message.

[0651] (21) The method of (19), wherein the first link failure report message comprises at least one of the following information:

[0652] indication information indicating whether to store link failure related information;

[0653] indication information indicating whether to store source link failure related information.

[0654] (22) The method of (15), further comprising:

[0655] receiving first user information reporting information sent by the user equipment, the first user information reporting information comprising source link failure related information;

[0656] sending a first user information forwarding message to the second base station, the first user information forwarding message being used for the first base station to inform the second base station of the source link failure related information.

[0657] (23) The method of (22), wherein the first user information reporting information comprises at least one of the following information:

[0658] indication information of the source link failure;

[0659] link failure related information;

[0660] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0661] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0662] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0663] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0664] indication information of a time length from the source link failure to successful access of the target cell by the user equipment.

[0665] (24) The method of (22), wherein the first user information forwarding message comprises at least one of the following information:

[0666] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0667] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0668] link failure related information;

[0669] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0670] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0671] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0672] indication information of a time length from the source link failure to successful access of the target cell by the user equipment;

[0673] indication information of a time length from the source link failure to successful access of the target cell by the user equipment.

[0674] (25) The method of (15), further comprising:

[0675] sending, to the second base station, a first failure indication message for the first base station to inform the second base station of information related to the link failure of the user equipment or information related to the reestablishment.

[0676] (26) The method of (25), wherein the first failure indication message comprises at least one of the following information:

[0677] link failure related information;

[0678] source link failure related information;

[0679] target link failure related information;

[0680] handover failure related information;

[0681] indication information indicating that the link failure type is a source link failure at handover;

[0682] indication information indicating that the cell where the link failure occurs is a source cell at handover;

[0683] indication information indicating a time when the source link failure occurs;

[0684] identification information of the cell where the link failure occurs;

[0685] time length information from the source link failure to successful access of the target cell by the user;

[0686] time length information from the initialization of handover to successful access of the target cell;

[0687] time length information from the initialization of handover to the occurrence of the source link failure.

[0688] (27) The method of (15), further comprising:

[0689] configuring network parameters according to the first information.

[0690] (28) The method of (15), further comprising:

[0691] sending the first information to another base station to enable another base station to configure network parameters.

[0692] (29) A method of forwarding link failure information performed by a second base station, the method comprising:

[0693] receiving a first failure indication message sent by a first base station, the first failure indication message being used by the first base station to notify the second base station of information related to link failure reporting of a user equipment or information related to reestablishment;

[0694] sending a first handover report message to a third base station, the first handover report being used by the second base station to notify the third base station of information related to link failure reporting of the user equipment or information related to reestablishment.

[0695] (30) The method of (29), wherein the first failure indication message comprises at least one of the following information:

[0696] link failure related information;

[0697] source link failure related information;

[0698] target link failure related information;

[0699] handover failure related information;

[0700] indication information indicating that the link failure type is a source link failure at handover;

[0701] indication information indicating that the cell where the link failure occurs is a source cell at handover;

[0702] indication information indicating a time when the source link failure occurs;

[0703] identification information of the cell where the link failure occurs;

[0704] time length information from the source link failure to successful access of the user equipment to a target cell;

[0705] time length information from initialization of handover to successful access to the target cell;

[0706] time length information from initialization of handover to occurrence of the source link failure.

[0707] (31) The method of (29), wherein the first handover report message comprises at least one of the following information:

[0708] indication information of a link failure type;

[0709] indication information indicating occurrence of a source link failure;

[0710] link failure related information;

[0711] source link failure related information;

[0712] target link failure related information;

[0713] handover failure related information;

[0714] mobility related information;

[0715] indication information indicating that the link failure type is a source link failure at handover;

[0716] indication information indicating that the cell where the link failure occurs is a source cell at handover;

[0717] indication information indicating a time when the source link failure occurs;

[0718] identification information of the cell where the link failure occurs;

[0719] time length information from the source link failure to successful access of the user equipment to a target cell;

[0720] time length information from initialization of handover to successful access to the target cell;

[0721] time length information from initialization of handover to occurrence of the source link failure.

[0722] (32) A method of recording link failure related information performed by a user equipment, the method comprising:

[0723] detecting a link failure;

[0724] recording link failure related information, wherein the link failure related information comprises at least one of first link failure information, second link failure information, or time length information.

[0725] (33) The method of (32), wherein the first link failure or the second link failure comprises a source link failure, a target link failure, or a handover failure.

[0726] (34) The method of (32), wherein the first link failure information comprises at least one of:

[0727] measurement information of a cell acquired by the user equipment when the first link failure occurs;

[0728] first identification information of the user equipment;

[0729] identification information of a cell in which a handover command is received before the first link failure occurs;

[0730] indication information of a cell in which the first link failure occurs;

[0731] identification information of a cell in which the first link failure occurs;

[0732] indication information of a time when the first link failure occurs;

[0733] indication information of a first link failure type;

[0734] cause information of the first link failure;

[0735] identification information of a target cell of a handover;

[0736] indication information of a handover type.

[0737] (35) The method of (32), wherein the time length information comprises at least one of:

[0738] time length information of a time elapsed from a handover initialization to the occurrence of the first link failure.

[0739] time length information of a time elapsed from the handover initialization to the occurrence of the second link failure;

[0740] time length information of a time interval between the occurrence of the first link failure and the occurrence of the second link failure;

[0741] information of time length experienced from successfully accessing the target cell of handover to occurrence of the first link failure;

[0742] information of time length experienced from successfully accessing the target cell of handover to occurrence of the second link failure;

[0743] time length experienced from occurrence of the first link failure to successfully accessing a cell;

[0744] time length experienced from occurrence of the second link failure to successfully accessing a cell;

[0745] information of time length experienced from receiving the handover command to successfully accessing the target cell of handover;

[0746] information of time length of breaking communication with the source cell of handover.

[0747] (36) A method of configuring link failure performed by a user equipment, further comprising:

[0748] receiving first configuration information sent by a first base station, the first configuration information being used for the user equipment to determine whether to record information related to link failure reporting;

[0749] determining whether to record the information related to link failure reporting according to the first configuration information.

[0750] (37) The method of (36), wherein the first configuration information comprises at least one of the following information:

[0751] indication information indicating whether to record link failure related information;

[0752] indication information indicating whether to record source link failure related information in a handover process;

[0753] time threshold information indicating whether to record link failure related information.

[0754] (38) The method of (36), further comprising:

[0755] determining whether to record the information related to link failure reporting according to a default configuration.

[0756] (39) The method of (38), wherein the default configuration is configured based on time or time length information of occurrence of a source link failure.

[0757] (40) The method of (36), further comprising:

[0758] detecting a link failure;

[0759] recording the information related to link failure reporting.

[0760] (41) The method of (40), wherein recording the information related to the link failure reporting comprises at least one of recording the link failure related information, and recording the source link failure related information in the handover procedure.

[0761] (42) The method of (41), wherein the link failure related information comprises at least one of first link failure information, second link failure information, or time length information.

[0762] (43) The method of (42), wherein the first link failure information comprises at least one of:

[0763] measurement information of a cell acquired by the user equipment when the first link failure occurs;

[0764] first identification information of the user equipment;

[0765] identification information of a cell in which the handover command is received before the first link failure occurs;

[0766] indication information of a cell in which the first link failure occurs;

[0767] identification information of a cell in which the first link failure occurs;

[0768] indication information of a time when the first link failure occurs;

[0769] indication information of a first link failure type;

[0770] cause information of the first link failure;

[0771] identification information of a target cell of the handover;

[0772] indication information of a handover type.

[0773] (44) The method of (42), wherein the time length information comprises at least one of:

[0774] time length information of a time experienced from the handover initialization to the occurrence of the first link failure.

[0775] time length information of a time experienced from the handover initialization to the occurrence of the second link failure;

[0776] time length information of a time interval between the occurrence of the first link failure and the occurrence of the second link failure;

[0777] time length information of a time experienced from the successful access to the target cell of the handover to the occurrence of the first link failure;

[0778] information on a length of time taken from successfully accessing a target cell of handover to occurrence of a second link failure;

[0779] information on a length of time taken from occurrence of a first link failure to successfully accessing a cell;

[0780] information on a length of time taken from occurrence of a second link failure to successfully accessing a cell;

[0781] information on a length of time taken from receiving a handover command to successfully accessing a target cell of handover;

[0782] information on a length of time of communication interruption with a source cell of handover.

[0783] (45) A method of link failure reporting performed by a first base station, the method comprising:

[0784] receiving a first link failure report message transmitted by a user equipment, the first link failure report message being used to inform a base station of whether the user equipment stores information related to link failure reporting;

[0785] determining whether to request the user equipment for information related to link failure reporting based on the first link failure report message.

[0786] (46) The method of (45), wherein the first link failure report message includes at least one of the following information:

[0787] indication information indicating whether to store link failure related information;

[0788] indication information indicating whether to store source link failure related information.

[0789] (47) A user equipment comprising:

[0790] a transceiver configured to transmit and receive signals with an outside; and

[0791] a processor configured to control the transceiver to perform the method according to any one of (1) to (14) or (32) to (44).

[0792] (48) A base station comprising:

[0793] a transceiver configured to transmit and receive signals with an outside; and

[0794] a processor configured to control the transceiver to perform the method according to any one of (15) to (31) or (43) to (46).

[0795] (49) A non-transitory computer-readable recording medium having stored thereon a program for causing a computer to execute the method of any one of (1) to (46) when the program is run by the computer.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: Receive a reconfiguration message related to the handover of the dual-activation protocol stack (DAPS) from the base station (BS), the reconfiguration message including threshold information; If the handover is successful, the handover information is stored based on the time length obtained by the UE and the threshold information; as well as Send a report message including the handover information to the BS. In the event that a Radio Link Failure (RLF) occurs in the source cell during the DAPS handover, the handover information includes indication information indicating that an RLF occurred in the source cell.

2. The method according to claim 1, wherein, The occurrence of RLF in the source cell is determined based on the timeout of the timer.

3. The method according to claim 1, wherein, The reconfiguration message includes an indication of whether the UE stores handover information in the event that the RLF occurs in the source cell during the DAPS handover.

4. The method according to claim 1, wherein, The information used for the switch includes at least one of the following: Measurement information regarding the UE's cell. Regarding the identification information of the UE, Regarding the identification information of the source community, Regarding the identification information of the target community, or Indication information regarding the type of the RLF.

5. The method according to claim 4, wherein, The measurement information regarding the UE's cell includes at least one of the following: The reference signal received power (RSRP) of the source cell or the target cell. The reference signal reception quality (RSRQ) of the source cell or the target cell, and The signal-to-interference-noise ratio (SINR) of the source cell or the target cell.

6. The method according to claim 4, wherein, The identification information regarding the UE includes the UE's Cell Radio Network Temporary Identifier (C-RNTI) in the target cell, and The indication information regarding the type of RLF indicates whether an RLF has occurred in the source cell.

7. The method according to claim 1, further comprising: Detection link failed; as well as Send a report message related to the link failure to the BS.

8. The method according to claim 7, wherein, The reporting message related to the link failure includes at least one of the following: The type of link failure indication is a handover failure indication message. The indication type of the handover is the indication information for DAPS handover. Indication information indicating the length of time between instructing the UE to perform a DAPS handover and the UE experiencing a link failure in the source cell.

9. The method according to claim 1, wherein, The reconfiguration message includes indication information indicating whether the UE generates the handover if the RLF occurs in the source cell during the DAPS handover.

10. A method performed by a base station (BS), the method comprising: Send a reconfiguration message to the user equipment (UE) that is related to the handover of the dual-activation protocol stack (DAPS), the reconfiguration message including threshold information; as well as Receive a report message from the UE that includes information about the handover. The handover information, in the event of a successful handover, is stored by the UE based on the time duration obtained by the UE and the threshold information, and is included in the report message. In the event that a Radio Link Failure (RLF) occurs in the source cell during the DAPS handover, the handover information includes indication information indicating that an RLF occurred in the source cell.

11. The method according to claim 10, wherein, The occurrence of RLF in the source cell is determined based on the timeout of the timer.

12. The method according to claim 10, wherein, The reconfiguration message includes an indication of whether the UE stores handover information in the event that the RLF occurs in the source cell during the DAPS handover.

13. The method according to claim 10, wherein, The information used for the switch includes at least one of the following: Measurement information regarding the UE's cell. Regarding the identification information of the UE, Regarding the identification information of the source community, Regarding the identification information of the target community, or Indication information regarding the type of the RLF.

14. The method according to claim 13, wherein, The measurement information regarding the UE's cell includes at least one of the following: The reference signal received power (RSRP) of the source cell or the target cell. The reference signal reception quality (RSRQ) of the source cell or the target cell, and The signal-to-interference-noise ratio (SINR) of the source cell or the target cell.

15. The method according to claim 13, wherein, The identification information regarding the UE includes the UE's Cell Radio Network Temporary Identifier (C-RNTI) in the target cell, and The indication information regarding the type of RLF indicates whether an RLF has occurred in the source cell.

16. The method of claim 10, wherein, The method further includes: Receive a report message related to the link failure from the UE.

17. The method according to claim 16, wherein, The reporting message related to the link failure includes at least one of the following: The type of link failure indication is a handover failure indication message. The indication type of the handover is the indication information for DAPS handover. Indication information indicating the length of time between instructing the UE to perform a DAPS handover and the UE experiencing a link failure in the source cell.

18. The method according to claim 10, wherein, The reconfiguration message includes indication information indicating whether the UE generates the handover if the RLF occurs in the source cell during the DAPS handover.

19. A user equipment (UE) in a wireless communication system, the UE comprising: transceiver; as well as A processor coupled to the transceiver, wherein the processor is configured to: Receive a reconfiguration message related to the handover of the dual-activation protocol stack (DAPS) from the base station (BS), the reconfiguration message including threshold information; If the handover is successful, the handover information is stored based on the time duration obtained by the UE and the threshold information; and Send a report message including the handover information to the BS. In the event that a Radio Link Failure (RLF) occurs in the source cell during the DAPS handover, the handover information includes indication information indicating that an RLF occurred in the source cell.

20. The UE according to claim 19, wherein, The occurrence of RLF in the source cell is determined based on the timeout of the timer.

21. The UE according to claim 19, wherein, The reconfiguration message includes an indication of whether the UE stores handover information in the event that the RLF occurs in the source cell during the DAPS handover.

22. The UE according to claim 19, wherein, The information used for the switch includes at least one of the following: Measurement information regarding the UE's cell. Regarding the identification information of the UE, Regarding the identification information of the source community, Regarding the identification information of the target community, or Indication information regarding the type of the RLF.

23. The UE according to claim 22, wherein, The measurement information regarding the UE's cell includes at least one of the following: The reference signal received power (RSRP) of the source cell or the target cell. The reference signal reception quality (RSRQ) of the source cell or the target cell, and The signal-to-interference-noise ratio (SINR) of the source cell or the target cell.

24. The UE according to claim 22, wherein, The identification information regarding the UE includes the UE's Cell Radio Network Temporary Identifier (C-RNTI) in the target cell, and The indication information regarding the type of RLF indicates whether an RLF has occurred in the source cell.

25. The UE according to claim 19, wherein, The processor is also configured to: Detection link failure; and Send a report message related to the link failure to the BS.

26. The UE according to claim 25, wherein, The reporting message related to the link failure includes at least one of the following: The type of link failure indication is a handover failure indication message. The indication type of the handover is the indication information for DAPS handover. Indication information indicating the length of time between instructing the UE to perform a DAPS handover and the UE experiencing a link failure in the source cell.

27. The UE according to claim 19, wherein, The reconfiguration message includes indication information indicating whether the UE generates the handover if the RLF occurs in the source cell during the DAPS handover.

28. A base station (BS) in a wireless communication system, the BS comprising: transceiver; as well as A processor coupled to the transceiver, wherein the processor is configured to: Sending a reconfiguration message to the user equipment (UE) including a reconfiguration message related to dual-activation protocol stack (DAPS) handover, the reconfiguration message including threshold information; and Receive a report message from the UE that includes information about the handover. The handover information, in the event of a successful handover, is stored by the UE based on the time duration obtained by the UE and the threshold information, and is included in the report message. In the event that a Radio Link Failure (RLF) occurs in the source cell during the DAPS handover, the handover information includes indication information indicating that an RLF occurred in the source cell.

29. The BS according to claim 28, wherein, The occurrence of RLF in the source cell is determined based on the timeout of the timer.

30. The BS according to claim 28, wherein, The reconfiguration message includes an indication of whether the UE stores handover information in the event that the RLF occurs in the source cell during the DAPS handover.

31. The BS according to claim 28, wherein, The information used for the switch includes at least one of the following: Measurement information regarding the UE's cell. Regarding the identification information of the UE, Regarding the identification information of the source community, Regarding the identification information of the target community, or Indication information regarding the type of the RLF.

32. The BS according to claim 31, wherein, The measurement information regarding the UE's cell includes at least one of the following: The reference signal received power (RSRP) of the source cell or the target cell. The reference signal reception quality (RSRQ) of the source cell or the target cell, and The signal-to-interference-noise ratio (SINR) of the source cell or the target cell.

33. The BS according to claim 31, wherein, The identification information regarding the UE includes the UE's Cell Radio Network Temporary Identifier (C-RNTI) in the target cell and... The indication information regarding the type of RLF indicates whether an RLF has occurred in the source cell.

34. The BS according to claim 28, wherein, The processor is also configured to: Receive a report message related to the link failure from the UE.

35. The BS according to claim 34, wherein, The reporting message related to the link failure includes at least one of the following: The type of link failure indication is a handover failure indication message. The indication type of the handover is the indication information for DAPS handover. Indication information indicating the length of time between instructing the UE to perform a DAPS handover and the UE experiencing a link failure in the source cell.

36. The BS according to claim 28, wherein, The reconfiguration message includes indication information indicating whether the UE generates the handover if the RLF occurs in the source cell during the DAPS handover.

Images