Critical failure information reporting method and device and storage medium

Abstract

The invention relates to a critical failure information reporting method and device and a storage medium, and belongs to the technical field of communication. The method is applied to UE, and the method comprises the following steps: recording critical failure information and sending the critical failure information to a network node under the condition that the UE successfully executes LTM and a preset critical failure condition is satisfied. By adopting the method and the device, the reporting of the LTM critical failure information and the LTM critical failure optimization can be realized.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method, device, and storage medium for reporting critical failure information. Background Art

[0002] The R18 NR (New Radio) mobility project introduced the LTM (L1L2 triggered mobility) mechanism. Specifically, the network node pre-configures multiple candidate cell configurations and their L1 measurement configurations for the UE (User Equipment). The UE performs L1 measurements based on the L1 measurement configurations configured by the network node and reports them. The network node sends an LTM cell change (LTM cell switch) command to the UE based on the L1 measurements reported by the UE. The UE executes LTM based on the LTM cell switch command. The LTM cell switch command is sent to the UE via the MAC CE (Medium Access Control Control Element).

[0003] However, for the UE to successfully execute LTM, there is a lack of corresponding monitoring and optimization of the LTM execution process. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, device and storage medium for reporting critical failure information to address the above technical issues.

[0005] In a first aspect, a method for reporting critical failure information is provided, the method being applied to a user equipment (UE), the method comprising:

[0006] When the UE successfully executes the L1 / L2 triggered mobility LTM and meets a preset critical failure condition, critical failure information is recorded and sent to a network node.

[0007] As an optional implementation manner, the critical failure condition includes at least one or more of the following:

[0008] First critical failure condition: the LTM cell switch command carries non-contention random access CFRA resources, and the UE successfully executes LTM using the CFRA resources in the radio resource control RRC configuration;

[0009] Second critical failure condition: the LTM cell switch command carries CFRA resources, and the UE successfully performs LTM using contention random access CBRA resources;

[0010] Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using the CBRA resources;

[0011] Fourth critical failure condition: the LTM cell switch command carries a timing advance (TA) value, and the UE successfully performs RACH-less LTM using the measured TA value;

[0012] Fifth critical failure condition: the LTM cell switch command carries a TA value, and the UE successfully executes RACH-based LTM;

[0013] Sixth critical failure condition: the UE is configured with early TA measurement and the UE successfully performs RACH-based LTM;

[0014] Seventh critical failure condition: the duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell;

[0015] Eighth critical failure condition: the duration of the UE's access to the target cell is less than a second duration threshold, and the UE changes from the target cell to a non-source cell.

[0016] As an optional implementation manner, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following:

[0017] First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command;

[0018] Second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration;

[0019] CBRA resource information, where the CBRA resource information is resource information corresponding to the CBRA resource;

[0020] First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cellswitch command, and the execution of LTM fails;

[0021] Second execution indication information, where the second execution indication information is used to indicate that there is no synchronization signal / physical broadcast channel SSB or downlink channel state information reference signal CSI-RS that meets the conditions in the CFRA resources configured in the RRC configuration;

[0022] third execution indication information, where the third execution indication information is used to indicate that a satisfying SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM;

[0023] Source indication information of the RACH resource for the random access channel RACH attempt.

[0024] As an optional implementation manner, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following:

[0025] first TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cellswitch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command;

[0026] second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE;

[0027] third TA indication information, where the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid;

[0028] Fourth TA indication information, where the fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

[0029] As an optional implementation manner, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following:

[0030] The duration of the UE's stay in the target cell;

[0031] Cell indication information, where the cell indication information is used to indicate that the UE has experienced cell ping-pong reselection or has a short access time to a target cell;

[0032] Identification information of the cell where ping-pong reselection occurs;

[0033] Cell identification information of the target cell with the shortest access time;

[0034] The interval between the last LTM cell switch command and the current LTM cell switch command.

[0035] As an optional implementation manner, the critical failure information includes one or more of the following:

[0036] Failure condition indication information, wherein the failure condition indication information is used to indicate a triggering condition for triggering recording of the critical failure information;

[0037] L1 measurement configuration information;

[0038] L1 measurement result information;

[0039] Source cell information;

[0040] Target cell information;

[0041] Location information;

[0042] LTM candidate cell information.

[0043] As an optional implementation manner, the first CFRA resource information includes at least one or more of the following:

[0044] Random access preamble index;

[0045] SSB index;

[0046] Physical random access channel PRACH mask index;

[0047] Supplementary Uplink SUL / Uplink UL.

[0048] As an optional implementation manner, the second CFRA resource information includes at least one or more of the following:

[0049] SSB index or CSI-RS index;

[0050] Random access preamble index;

[0051] Random access timing;

[0052] Reference signal received power RSRP threshold.

[0053] As an optional implementation manner, the CBRA resource information includes at least one or more of the following:

[0054] SSB index or CSI-RS index;

[0055] PRACH mask index;

[0056] SUL / UL;

[0057] Random access preamble index;

[0058] Random access timing;

[0059] RSRP threshold.

[0060] As an optional implementation manner, the L1 measurement configuration information includes at least one or more of the following:

[0061] SSB frequency;

[0062] subcarrier spacing;

[0063] SSB cycle;

[0064] SSB time domain position;

[0065] SSB power.

[0066] As an optional implementation, the method further includes:

[0067] Receive configuration information sent by the network node, where the configuration information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the critical failure condition is met.

[0068] As an optional implementation manner, the configuration information includes at least one or more of the following:

[0069] First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the first critical failure condition is met;

[0070] Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the second critical failure condition is met;

[0071] third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the third critical failure condition is met;

[0072] Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the fourth critical failure condition is met;

[0073] fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the fifth critical failure condition is met;

[0074] Sixth feedback indication information, where the sixth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the sixth critical failure condition is met;

[0075] the first stay duration threshold;

[0076] The second stay duration threshold.

[0077] As an optional implementation manner, recording critical failure information includes:

[0078] The critical failure information is recorded in a successful handover report SHR or a successful PSCell change or addition report SPR, or in an existing report or a new report.

[0079] As an optional implementation manner, the sending the critical failure information to the network node includes:

[0080] receiving a UE information request message sent by the network node;

[0081] A UE information response message is sent to the network node, where the UE information response message carries the critical failure information.

[0082] As an optional implementation manner, before sending the critical failure information to the network node, the method further includes:

[0083] Sending critical failure record indication information to the network node, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0084] In a second aspect, a method for reporting critical failure information is provided, the method being applied to a network node, the method comprising:

[0085] Critical failure information recorded by a user equipment (UE) is obtained, where the critical failure information is recorded when the UE successfully performs L1 / L2 triggered mobility LTM and satisfies a preset critical failure condition.

[0086] As an optional implementation manner, obtaining critical failure information recorded by the UE includes:

[0087] Sending a UE information request message to the UE;

[0088] A UE information response message sent by the UE is received, where the UE information response message carries the critical failure information.

[0089] As an optional implementation manner, obtaining critical failure information recorded by the UE includes:

[0090] In response to the critical failure record indication information sent by the UE, the critical failure information recorded by the UE is acquired, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0091] As an optional implementation, the method further includes:

[0092] Perform LTM critical failure optimization based on the critical failure information; or forward the critical failure information to relevant network nodes through interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

[0093] In a third aspect, a user equipment (UE) is provided, including a memory, a transceiver, and a processor;

[0094] The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; and the processor is used to read the computer program in the memory and perform the following operations:

[0095] When the UE successfully executes the L1 / L2 triggered mobility LTM and meets a preset critical failure condition, critical failure information is recorded and sent to a network node.

[0096] As an optional implementation manner, the critical failure condition includes at least one or more of the following:

[0097] First critical failure condition: the LTM cell switch command carries non-contention random access CFRA resources, and the UE successfully executes LTM using the CFRA resources in the radio resource control RRC configuration;

[0098] Second critical failure condition: the LTM cell switch command carries CFRA resources, and the UE successfully performs LTM using contention random access CBRA resources;

[0099] Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using the CBRA resources;

[0100] Fourth critical failure condition: the LTM cell switch command carries a timing advance (TA) value, and the UE successfully performs RACH-less LTM using the measured TA value;

[0101] Fifth critical failure condition: the LTM cell switch command carries a TA value, and the UE successfully executes RACH-based LTM;

[0102] Sixth critical failure condition: the UE is configured with early TA measurement and the UE successfully performs RACH-based LTM;

[0103] Seventh critical failure condition: the duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell;

[0104] Eighth critical failure condition: the duration of the UE's access to the target cell is less than a second duration threshold, and the UE changes from the target cell to a non-source cell.

[0105] As an optional implementation manner, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following:

[0106] First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command;

[0107] Second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration;

[0108] CBRA resource information, where the CBRA resource information is resource information corresponding to the CBRA resource;

[0109] First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cellswitch command, and the execution of LTM fails;

[0110] Second execution indication information, where the second execution indication information is used to indicate that there is no synchronization signal / physical broadcast channel SSB or downlink channel state information reference signal CSI-RS that meets the conditions in the CFRA resources configured in the RRC configuration;

[0111] third execution indication information, where the third execution indication information is used to indicate that a satisfying SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM;

[0112] Source indication information of the RACH resource for the random access channel RACH attempt.

[0113] As an optional implementation manner, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following:

[0114] first TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cellswitch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command;

[0115] second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE;

[0116] third TA indication information, where the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid;

[0117] Fourth TA indication information, where the fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

[0118] As an optional implementation manner, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following:

[0119] The duration of the UE's stay in the target cell;

[0120] Cell indication information, where the cell indication information is used to indicate that the UE has experienced cell ping-pong reselection or has a short access time to a target cell;

[0121] Identification information of the cell where ping-pong reselection occurred;

[0122] Cell identification information of the target cell with the shortest access time;

[0123] The interval between the last LTM cell switch command and the current LTM cell switch command.

[0124] As an optional implementation manner, the critical failure information includes one or more of the following:

[0125] Failure condition indication information, wherein the failure condition indication information is used to indicate a triggering condition for triggering recording of the critical failure information;

[0126] L1 measurement configuration information;

[0127] L1 measurement result information;

[0128] Source cell information;

[0129] Target cell information;

[0130] Location information;

[0131] LTM candidate cell information.

[0132] As an optional implementation manner, the first CFRA resource information includes at least one or more of the following:

[0133] Random access preamble index;

[0134] SSB index;

[0135] Physical random access channel PRACH mask index;

[0136] Supplementary Uplink SUL / Uplink UL.

[0137] As an optional implementation manner, the second CFRA resource information includes at least one or more of the following:

[0138] SSB index or CSI-RS index;

[0139] Random access preamble index;

[0140] Random access timing;

[0141] Reference signal received power RSRP threshold.

[0142] As an optional implementation manner, the CBRA resource information includes at least one or more of the following:

[0143] SSB index or CSI-RS index;

[0144] PRACH mask index;

[0145] SUL / UL;

[0146] Random access preamble index;

[0147] Random access timing;

[0148] RSRP threshold.

[0149] As an optional implementation manner, the L1 measurement configuration information includes at least one or more of the following:

[0150] SSB frequency;

[0151] subcarrier spacing;

[0152] SSB cycle;

[0153] SSB time domain position;

[0154] SSB power.

[0155] As an optional implementation manner, the processor is further configured to read the computer program in the memory and perform the following operations:

[0156] Receive configuration information sent by the network node, where the configuration information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the critical failure condition is met.

[0157] As an optional implementation manner, the configuration information includes at least one or more of the following:

[0158] First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the first critical failure condition is met;

[0159] Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the second critical failure condition is met;

[0160] third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the third critical failure condition is met;

[0161] Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the fourth critical failure condition is met;

[0162] fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the fifth critical failure condition is met;

[0163] Sixth feedback indication information, where the sixth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the sixth critical failure condition is met;

[0164] the first stay duration threshold;

[0165] The second stay duration threshold.

[0166] As an optional implementation manner, recording critical failure information includes:

[0167] The critical failure information is recorded in a successful handover report SHR or a successful PSCell change or addition report SPR, or in an existing report or a new report.

[0168] As an optional implementation manner, the sending the critical failure information to the network node includes:

[0169] receiving a UE information request message sent by the network node;

[0170] A UE information response message is sent to the network node, where the UE information response message carries the critical failure information.

[0171] As an optional implementation manner, before sending the critical failure information to the network node, the processor is further configured to read the computer program in the memory and perform the following operations:

[0172] Sending critical failure record indication information to the network node, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0173] In a fourth aspect, a network node is provided, comprising a memory, a transceiver, and a processor;

[0174] The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; and the processor is used to read the computer program in the memory and perform the following operations:

[0175] Critical failure information recorded by a user equipment (UE) is obtained, where the critical failure information is recorded when the UE successfully performs L1 / L2 triggered mobility LTM and satisfies a preset critical failure condition.

[0176] As an optional implementation manner, obtaining critical failure information recorded by the UE includes:

[0177] Sending a UE information request message to the UE;

[0178] A UE information response message sent by the UE is received, where the UE information response message carries the critical failure information.

[0179] As an optional implementation manner, obtaining critical failure information recorded by the UE includes:

[0180] In response to the critical failure record indication information sent by the UE, the critical failure information recorded by the UE is acquired, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0181] As an optional implementation manner, the processor is further configured to read the computer program in the memory and perform the following operations:

[0182] Perform LTM critical failure optimization based on the critical failure information; or forward the critical failure information to relevant network nodes through interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

[0183] In a fifth aspect, a device for reporting critical failure information is provided, the device being applied to a user equipment (UE), the device including:

[0184] The first sending unit is configured to record critical failure information and send the critical failure information to a network node if the UE successfully executes L1 / L2 triggered mobility LTM and meets a preset critical failure condition.

[0185] As an optional implementation manner, the critical failure condition includes at least one or more of the following:

[0186] First critical failure condition: the LTM cell switch command carries non-contention random access CFRA resources, and the UE successfully executes LTM using the CFRA resources in the radio resource control RRC configuration;

[0187] Second critical failure condition: the LTM cell switch command carries CFRA resources, and the UE successfully performs LTM using contention random access CBRA resources;

[0188] Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using the CBRA resources;

[0189] Fourth critical failure condition: the LTM cell switch command carries a timing advance (TA) value, and the UE successfully performs RACH-less LTM using the measured TA value;

[0190] Fifth critical failure condition: the LTM cell switch command carries a TA value, and the UE successfully executes RACH-based LTM;

[0191] Sixth critical failure condition: the UE is configured with early TA measurement and the UE successfully performs RACH-based LTM;

[0192] Seventh critical failure condition: the duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell;

[0193] Eighth critical failure condition: the duration of the UE's access to the target cell is less than a second duration threshold, and the UE changes from the target cell to a non-source cell.

[0194] As an optional implementation manner, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following:

[0195] First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command;

[0196] Second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration;

[0197] CBRA resource information, where the CBRA resource information is resource information corresponding to the CBRA resource;

[0198] First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cellswitch command, and the execution of LTM fails;

[0199] Second execution indication information, where the second execution indication information is used to indicate that there is no synchronization signal / physical broadcast channel SSB or downlink channel state information reference signal CSI-RS that meets the conditions in the CFRA resources configured in the RRC configuration;

[0200] third execution indication information, where the third execution indication information is used to indicate that a satisfying SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM;

[0201] Source indication information of the RACH resource for the random access channel RACH attempt.

[0202] As an optional implementation manner, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following:

[0203] first TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cellswitch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command;

[0204] second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE;

[0205] third TA indication information, where the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid;

[0206] Fourth TA indication information, where the fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

[0207] As an optional implementation manner, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following:

[0208] The duration of the UE's stay in the target cell;

[0209] Cell indication information, where the cell indication information is used to indicate that the UE has experienced cell ping-pong reselection or has a short access time to a target cell;

[0210] Identification information of the cell where ping-pong reselection occurred;

[0211] Cell identification information of the target cell with the shortest access time;

[0212] The interval between the last LTM cell switch command and the current LTM cell switch command.

[0213] As an optional implementation manner, the critical failure information includes one or more of the following:

[0214] Failure condition indication information, wherein the failure condition indication information is used to indicate a triggering condition for triggering recording of the critical failure information;

[0215] L1 measurement configuration information;

[0216] L1 measurement result information;

[0217] Source cell information;

[0218] Target cell information;

[0219] Location information;

[0220] LTM candidate cell information.

[0221] As an optional implementation manner, the first CFRA resource information includes at least one or more of the following:

[0222] Random access preamble index;

[0223] SSB index;

[0224] Physical random access channel PRACH mask index;

[0225] Supplementary Uplink SUL / Uplink UL.

[0226] As an optional implementation manner, the second CFRA resource information includes at least one or more of the following:

[0227] SSB index or CSI-RS index;

[0228] Random access preamble index;

[0229] Random access timing;

[0230] Reference signal received power RSRP threshold.

[0231] As an optional implementation manner, the CBRA resource information includes at least one or more of the following:

[0232] SSB index or CSI-RS index;

[0233] PRACH mask index;

[0234] SUL / UL;

[0235] Random access preamble index;

[0236] Random access timing;

[0237] RSRP threshold.

[0238] As an optional implementation manner, the L1 measurement configuration information includes at least one or more of the following:

[0239] SSB frequency;

[0240] subcarrier spacing;

[0241] SSB cycle;

[0242] SSB time domain position;

[0243] SSB power.

[0244] As an optional implementation, the device further includes:

[0245] A receiving unit is configured to receive configuration information sent by the network node, where the configuration information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully executed and the critical failure condition is met.

[0246] As an optional implementation manner, the configuration information includes at least one or more of the following:

[0247] First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the first critical failure condition is met;

[0248] Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the second critical failure condition is met;

[0249] third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the third critical failure condition is met;

[0250] Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the fourth critical failure condition is met;

[0251] fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the fifth critical failure condition is met;

[0252] Sixth feedback indication information, where the sixth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the sixth critical failure condition is met;

[0253] the first stay duration threshold;

[0254] The second stay duration threshold.

[0255] As an optional implementation manner, the first sending unit is specifically configured to:

[0256] The critical failure information is recorded in a successful handover report SHR or a successful PSCell change or addition report SPR, or in an existing report or a new report.

[0257] As an optional implementation manner, the first sending unit is specifically configured to:

[0258] receiving a UE information request message sent by the network node;

[0259] A UE information response message is sent to the network node, where the UE information response message carries the critical failure information.

[0260] As an optional implementation, the device further includes:

[0261] The second sending unit is configured to send critical failure record indication information to the network node, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0262] In a sixth aspect, a device for reporting critical failure information is provided, the device being applied to a network node, the device comprising:

[0263] The acquiring unit is configured to acquire critical failure information recorded by a user equipment (UE), where the critical failure information is recorded when the UE successfully performs L1 / L2 triggered mobility LTM and satisfies a preset critical failure condition.

[0264] As an optional implementation manner, the acquiring unit is specifically configured to:

[0265] Sending a UE information request message to the UE;

[0266] A UE information response message sent by the UE is received, where the UE information response message carries the critical failure information.

[0267] As an optional implementation manner, the acquiring unit is specifically configured to:

[0268] In response to the critical failure record indication information sent by the UE, the critical failure information recorded by the UE is acquired, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0269] As an optional implementation, the device further includes:

[0270] The optimization unit is configured to perform LTM critical failure optimization based on the critical failure information; or forward the critical failure information to relevant network nodes through interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

[0271] In a seventh aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any one of claims 1 to 15, or 16 to 19 are implemented.

[0272] The present application provides a method, apparatus, and storage medium for reporting critical failure information. The technical solutions provided by the embodiments of the present application provide at least the following beneficial effects: When a UE successfully executes LTM and meets preset critical failure conditions, the UE records the critical failure information and sends it to a network node. The network node then performs LTM critical failure optimization based on the critical failure information. In this way, the network node performs LTM critical failure optimization based on the critical failure information reported by the UE, thereby avoiding subsequent LTM failures caused by the risk of critical failure.

[0273] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0274] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0275] Figure 1 A flowchart of a method for reporting critical failure information provided in an embodiment of the present application;

[0276] Figure 2 A flowchart of a method for reporting critical failure information provided in an embodiment of the present application;

[0277] Figure 3 A schematic diagram of the structure of a UE provided in an embodiment of the present application;

[0278] Figure 4 A schematic diagram of the structure of a network node provided in an embodiment of the present application;

[0279] Figure 5 A schematic diagram of the structure of a critical failure information reporting device provided in an embodiment of the present application;

[0280] Figure 6 A structural diagram of a critical failure information reporting device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0281] In embodiments of the present invention, the term "and / or" describes the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0282] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0283] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0284] LTM supports RACH-based LTM (LTM based on RACH (Random Access Channel) process) and RACH-less LTM (LTM without RACH process), among which RACH-based LTM can support CFRA (Contention Free Random Access) and CBRA (Contention Based Random Access). When the UE receives the LTM cell switch command sent by the network node, if the LTM cell switch command carries CFRA resources, the UE uses the CFRA resources in the LTM cell switch command to execute RACH-based LTM. If the LTM cell switch command does not carry CFRA resources, but the RRC (Radio Resource Control) configuration is configured with CFRA configuration information, the UE uses the CFRA resources in the RRC configuration to execute RACH-based LTM. If the network node does not provide CFRA resources, the UE uses CBRA resources to execute RACH-based LTM.

[0285] If the UE can obtain the TA (Timing Advance) value of the target candidate cell, the UE can perform RACH-less LTM. Among them, the UE can obtain the TA value in two ways. The first is that the UE obtains the TA value from the LTM cellswitch command, and the other is that the UE calculates the TA value by itself. If the LTM cell switch command carries a TA value, the UE uses the TA value carried in the LTM cell switch command to perform RACH-less LTM. If the LTM cellswitch command does not carry a TA value, but the UE is configured to perform early TA measurement, the UE uses the measured TA value to perform RACH-less LTM. If the UE cannot obtain the TA value, the UE performs RACH-based LTM.

[0286] However, even if a UE successfully executes LTM, some critical failure risks still exist. These critical failure risks can include failure to execute LTM as expected due to inappropriate configuration information or commands, or cell ping-pong reselection, short stay, and other issues. When a UE successfully executes LTM due to these critical failure risks, the UE does not report the corresponding critical failure information to the network node, potentially causing subsequent LTM execution failures due to the critical failure risk.

[0287] The present application embodiment provides a method for reporting critical failure information, such as Figure 1 As shown, the method is applied to UE, and the specific processing steps are as follows:

[0288] Step 101: When the UE successfully executes LTM and meets a preset critical failure condition, the UE records critical failure information and sends the critical failure information to a network node.

[0289] In implementations, a network node may pre-configure multiple candidate cell configurations and their L1 measurement configurations for a UE. The UE may perform and report L1 measurements based on the L1 measurement configurations configured by the network node. The network node may send an LTM cell switch command to the UE based on the L1 measurements reported by the UE. Accordingly, the UE may receive the LTM cell switch command sent by the network node. The UE may then execute LTM based on the LTM cell switch command. If the UE successfully executes LTM and meets preset critical failure conditions, the UE may record critical failure information and send the critical failure information to the network node. Critical failure risks may include failure to execute LTM according to the expected configuration due to inappropriate configuration information or commands, or the occurrence of cell ping-pong reselection, short of stay, and other issues. In this way, if the UE successfully executes LTM and meets preset critical failure conditions, the UE may record the critical failure information and send the critical failure information to the network node. This allows the network node to perform LTM critical failure optimization based on the critical failure information reported by the UE, thereby preventing subsequent LTM failures caused by critical failure risks.

[0290] It should be noted that the LTM can be the MCG LTM (LTM on the MCG (Master Cell Group) side) or the SCG LTM (LTM on the SCG (Secondary Cell Group) side). The reporting of critical failure information of the MCG LTM and SCG LTM can be configured separately or together. In the case where the MCG LTM and SCG LTM are configured separately, the reporting of critical failure information can be reported in different reports. In the case where the MCG LTM and SCG LTM are configured together, the reporting of critical failure information can be reported together through the same report.

[0291] As an optional implementation, the critical failure risk faced by the UE when executing LTM is different, and the critical failure conditions corresponding to different critical failure risks are also different. Based on this, the critical failure conditions include at least one or more of the following:

[0292] Critical failure risk 1 (CFRA resource critical failure risk):

[0293] First critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using the CFRA resources in the RRC configuration;

[0294] Second critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using CBRA resources;

[0295] Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using CBRA resources;

[0296] Critical failure risk 2 (TA resource critical failure risk):

[0297] Fourth critical failure condition: The LTM cell switch command carries a TA value, and the UE successfully executes RACH-less LTM using the measured TA value;

[0298] Fifth critical failure condition: The LTM cell switch command carries a TA value and the UE successfully executes RACH-based LTM;

[0299] Sixth critical failure condition: The UE is configured with early TA (early timing advance) measurement and the UE successfully performs RACH-based LTM;

[0300] Critical failure risk three (critical failure risk of cell change):

[0301] Seventh critical failure condition: The duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell;

[0302] Eighth critical failure condition: The UE's dwell time in the target cell is less than the second dwell time threshold, and the UE changes from the target cell to a non-source cell, where the non-source cell is a third cell other than the source cell and the target cell.

[0303] As an optional implementation, the UE may receive configuration information sent by the network node, wherein the configuration information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a critical failure condition is met.

[0304] As an optional implementation manner, the configuration information includes at least one or more of the following:

[0305] First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a first critical failure condition is met;

[0306] Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and the second critical failure condition is met;

[0307] Third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a third critical failure condition is met;

[0308] Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fourth critical failure condition is met;

[0309] Fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fifth critical failure condition is met;

[0310] Sixth feedback indication information, the sixth feedback indication information is used to instruct the UE to record and feedback critical failure information to the network node when LTM is successfully executed and a sixth critical failure condition is met;

[0311] First stay duration threshold;

[0312] Second stay duration threshold.

[0313] Optionally, the above indication information may be 1-bit indication information, and the first stay time threshold and the second stay time threshold may be specific time lengths, and the units may be milliseconds, seconds, etc.

[0314] As an optional implementation, for critical failure risk 1 (CFRA resource critical failure risk), that is, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following:

[0315] First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command;

[0316] The second CFRA resource indication information and / or the second CFRA resource information, the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is the resource information corresponding to the CFRA resources configured in the RRC configuration; wherein the RRC configuration is the LTM candidate cell configuration pre-configured by the network node.

[0317] CBRA resource information, which is resource information corresponding to CBRA resources;

[0318] First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cell switch command, and the execution of LTM fails;

[0319] Second execution indication information, where the second execution indication information is used to indicate that no SSB (SS (Synchronization Signal, synchronization signal) / PBCH block (PBCH (Physical broadcast channel, physical broadcast channel) block)) or CSI-RS (Channel State Information-Reference Signal, downlink channel state information reference signal) meeting the conditions exists in the CFRA resources configured in the RRC configuration;

[0320] The third execution indication information is used to indicate that a qualified SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM;

[0321] Source indication information of the RACH resources for the RACH attempt, where the UE can record during each RACH attempt recording whether the RACH resources used for this RACH attempt are from the CFRA resources carried in the LTM cell switch command, from the CFRA resources configured in the RRC configuration, or from the CBRA resources. The above can be for a specific SSB or CSI-RS, indicating the source of the RACH resources used for each RACH attempt.

[0322] Optionally, each of the above indication information may be 1-bit indication information. In particular, the RACH resource source indication information may be 1-bit or multi-bit indication information, and may be an enumeration type, such as ENUMERATED{LTM cellswitch command CFRA resource, RRC configuration CFRA resource, CBRA resource}.

[0323] As an optional implementation manner, the first CFRA resource information includes at least one or more of the following:

[0324] Random Access Preamble index;

[0325] SSB index;

[0326] PRACH mask index (PRACH (Physical Random Access Channel, physical random access channel) Mask index);

[0327] SUL (Supplementary Uplink) / UL (Uplink).

[0328] As an optional implementation manner, the second CFRA resource information includes at least one or more of the following:

[0329] SSB index or CSI-RS index (CSI-RS index);

[0330] Random access preamble index;

[0331] Random Access Occasion;

[0332] RSRP (Reference Signal Received Power) threshold, where the RSRP threshold can be a threshold related to SSB or a threshold related to CSI-RS.

[0333] As an optional implementation, the CBRA resource information includes at least one or more of the following:

[0334] SSB index or CSI-RS index;

[0335] PRACH mask index;

[0336] SUL / UL;

[0337] Random access preamble index;

[0338] Random access timing;

[0339] RSRP threshold.

[0340] The embodiment of the present application is directed to critical failure risk one (CFRA resource critical failure risk), that is, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information reported by the UE can be used by the network node to optimize the RACH resources, so that the network node can provide effective RACH resources to the UE.

[0341] As an optional implementation, for critical failure risk 2 (TA resource critical failure risk), that is, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following:

[0342] First TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cell switch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command;

[0343] Second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE;

[0344] Third TA indication information, the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid;

[0345] The fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

[0346] Optionally, each of the above indication information may be 1-bit indication information.

[0347] The embodiment of the present application is aimed at critical failure risk 2 (critical failure risk of TA resources), that is, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information reported by the UE can be used by the network node to optimize the configuration and decision of early TA acquisition, reduce resource waste and energy consumption, and improve the performance of early TA acquisition.

[0348] As an optional implementation, for critical failure risk three (cell change critical failure risk), that is, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following:

[0349] The duration of the UE's stay in the target cell; for example, for ping-pong handover, the duration of the UE's stay in the target cell before returning to the source cell is recorded; or for short of stay, the duration of the UE's stay in the target cell before accessing a third cell that is neither the source nor the target cell is recorded;

[0350] Cell indication information: The cell indication information is used to indicate that the UE has experienced a cell ping-pong reselection (such as ping-pong handover) or a short time to access the target cell. This indication information can be the same indication information or separate different indication information for the ping-pong reselection or the short time to access the target cell. This cell indication information can also be recorded as a cause value that triggers the recording of this critical failure information;

[0351] The identification information of the cell where ping-pong reselection occurs; may include the identification information of the source cell or the identification information of the target cell where ping-pong reselection occurs;

[0352] The cell identification information of the target cell accessed for a short time may include source cell identification information, target cell identification information, or third cell identification information, where the third cell is a cell newly accessed by the UE after accessing the target cell for a short time;

[0353] The interval between the last LTM cell switch command and the current LTM cell switch command.

[0354] Optionally, each of the above indication information may be 1 bit or multiple bits of indication information, and the units of the above time interval and dwell time may be milliseconds or seconds.

[0355] The embodiment of the present application is aimed at critical failure risk three (critical failure risk of cell change), that is, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information reported by the UE can be used by the network node to optimize the ping-pong or short of stay problem and reduce data interruption delay.

[0356] As an optional implementation, the critical failure information includes one or more of the following:

[0357] Failure condition indication information, which is used to indicate the triggering condition (also called cause value) for triggering the recording of this critical failure information, i.e., one or more of the first to eighth critical failure conditions. The failure condition indication information may be 1 bit or multiple bits, and may also be an enumeration type, such as the first critical failure condition ENUMERATED{true}, and / or the second critical failure condition ENUMERATED{true}, and / or the third critical failure condition ENUMERATED{true}, and so on;

[0358] L1 measurement configuration information;

[0359] L1 measurement result information, where the L1 measurement result information may include the measurement result of each candidate cell, and the measurement result may be SSB L1-RSRP, CSI-RS L1-RSRP, etc.;

[0360] Source cell information, where the source cell information includes source cell identification information and / or source cell L1 measurement result information. The L1 measurement result information may be SSB L1-RSRP or CSI-RS L1-RSRP, etc. The source cell identification information may be PCI (Physical Cell ID, physical cell ID) + frequency or CGI (Cell Global Identifier, global cell unified identification);

[0361] Target cell information, where the target cell information may include target cell identification information and / or target cell L1 measurement result information, the L1 measurement result information may be SSB L1-RSRP, or CSI-RS L1-RSRP, etc., and the target cell identification information may be PCI+frequency or CGI;

[0362] Location information, where the location information may include longitude, latitude, altitude, GPS (Global Positioning System) information, etc. of the UE;

[0363] LTM candidate cell information, where the LTM candidate cell information may include the identification information of the LTM candidate cell and / or the L1 measurement result information of the candidate cell, the L1 measurement result information may be SSB L1-RSRP, or CSI-RS L1-RSRP, etc., and the LTM candidate cell identification information may be PCI+frequency or CGI (the LTM candidate cell identification information and / or the L1 measurement result information of the LTM candidate cell may be recorded in a list format, and each entry in the list is the identification information and / or L1 measurement result information of an LTM candidate cell), or an indication information may be added to the L1 or L3 neighboring area measurement result to indicate that this neighboring area is an LTM candidate cell.

[0364] It should be noted that the UE may record the information included in the above critical failure information separately, or may record the information included in the above critical failure information on the basis of recording the information included in the critical failure information corresponding to critical failure risks one and / or two and / or three.

[0365] As an optional implementation manner, the L1 measurement configuration information includes at least one or more of the following:

[0366] SSB frequency (SSB-Frequency);

[0367] Sub-Carrier Spacing;

[0368] SSB-Periodicity;

[0369] SSB time domain position (SSB-Positions In Burst);

[0370] SSB power (SSB-Power).

[0371] As an optional implementation method, the UE records critical failure information and can record the critical failure information in SHR (Successful Handover Report) or SPR (Successful PSCell change or addition Report), or in an existing report (such as CEF (Connection Establishment Failure) report, RLF (Radio Link Failure) report, etc.), or in a newly introduced report, where the PSCell is the primary cell (Primary SCG Cell) of the secondary cell group.

[0372] As an optional implementation, the UE sends critical failure information to the network node, and the processing process is as follows:

[0373] Step 1: Receive a UE information request message sent by a network node.

[0374] In implementation, the network node may send a UE information request message to the UE, and correspondingly, the UE may receive the UE information request message sent by the network node.

[0375] Step 2: Send a UE information response message to the network node, wherein the UE information response message carries critical failure information.

[0376] In implementation, after receiving the UE information request message sent by the network node, the UE may send a UE information response message to the network node, wherein the UE information response message carries critical failure information.

[0377] As an optional implementation, before the UE sends the critical failure information to the network node, the UE may send critical failure record indication information to the network node, wherein the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0378] In implementations, after recording critical failure information, the UE may send critical failure record indication information to the network node. The critical failure record indication information is used to indicate that the UE has recorded the critical failure information. In this way, after recording the critical failure information, the UE sends the critical failure record indication information to the network node. The network node receives the critical failure record indication information sent by the UE and then obtains the critical failure information recorded by the UE. This can reduce the signaling overhead caused by the network node repeatedly obtaining critical failure information.

[0379] The present application also provides a method for reporting critical failure information, such as Figure 2 As shown, this method is applied to network nodes, and the specific processing steps are as follows:

[0380] Step 201: Acquire critical failure information recorded by the UE, wherein the critical failure information is recorded when the UE successfully executes LTM and meets a preset critical failure condition.

[0381] In implementation, after the UE successfully executes LTM and records critical failure information when a preset critical failure condition is met, the network node may obtain the critical failure information recorded by the UE.

[0382] As an optional implementation, in the above step 201, the process of the network node obtaining the critical failure information recorded by the UE is as follows.

[0383] Step 1: Send a UE information request message to the UE.

[0384] In implementation, when the network node needs to obtain critical failure information recorded by the UE, the network node may send an information request message to the UE.

[0385] Step 2: Receive a UE information response message sent by the UE, where the UE information response message carries critical failure information.

[0386] In implementation, after receiving the UE information request message sent by the network node, the UE may send a UE information response message to the network node. The UE information response message may include critical failure information. Accordingly, the network node may receive the UE information response message sent by the UE.

[0387] As an optional implementation manner, the network node may obtain the critical failure information recorded by the UE in response to the critical failure record indication information sent by the UE, wherein the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0388] In implementations, after recording critical failure information, the UE may send critical failure record indication information to the network node. The critical failure record indication information is used to indicate that the UE has recorded the critical failure information. Accordingly, after receiving the critical failure record indication information sent by the UE, the network node may, in response to the critical failure record indication information sent by the UE, obtain the critical failure information recorded by the UE. In this way, after receiving the critical failure record indication information sent by the UE, the network node can obtain the critical failure information recorded by the UE, thereby reducing the signaling overhead caused by the network node repeatedly obtaining critical failure information.

[0389] As an optional implementation, the network node may perform LTM critical failure optimization based on critical failure information; or, forward the critical failure information to relevant network nodes via interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

[0390] In implementation, after receiving critical failure information, the network node can perform LTM critical failure optimization based on the critical failure information. Alternatively, the network node can forward the critical failure information to relevant network nodes via interface signaling, so that the relevant network nodes can perform LTM critical failure optimization based on the critical failure information. The interface signaling can be one or more of Xn, X2, F1, and E1 interface signaling; and the relevant network nodes are network nodes equipped with LTM critical failure optimization capabilities. In this way, for critical failure risk one (CFRA resource critical failure risk), that is, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information reported by the UE can be used by the network node to optimize the RACH resources, so that the network node can provide effective RACH resources to the UE; for critical failure risk two (TA resource critical failure risk), that is, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information reported by the UE can be used by the network node to optimize the configuration and decision of early TA acquisition, reduce resource waste and energy consumption, and improve the performance of early TA acquisition; for critical failure risk three (cell change critical failure risk), that is, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information reported by the UE can be used by the network node to optimize the ping-pong or short of stay problem and reduce data interruption delay.

[0391] The present application provides three different embodiments, which are as follows:

[0392] Example 1:

[0393] Step 1: The network node sends configuration information to the UE. The configuration information is used to instruct the UE to record and feedback critical failure information to the network node when LTM is successfully executed and the critical failure condition is met. The configuration information includes at least one or more of the following:

[0394] (1) First feedback indication information, which is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a first critical failure condition is met;

[0395] First critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using the CFRA resources in the RRC configuration;

[0396] (2) second feedback indication information, which is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and the second critical failure condition is met;

[0397] Second critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using CBRA resources;

[0398] (3) third feedback indication information, which is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and the third critical failure condition is met;

[0399] Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using CBRA resources;

[0400] Optionally, the above indication information may be 1-bit indication information, and the first stay time threshold and the second stay time threshold may be specific time lengths, and the units may be milliseconds, seconds, etc.

[0401] Step 2: The UE receives the LTM cell switch command sent by the network node. The UE executes LTM successfully and meets one or more of the following critical failure conditions:

[0402] (1) First critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using the CFRA resources in the RRC configuration;

[0403] (2) Second critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using CBRA resources;

[0404] (3) Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using CBRA resources.

[0405] Step 3: The UE records critical failure information. The critical failure information includes one or more of the following:

[0406] (1) First CFRA resource indication information and / or first CFRA resource information. The first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource. The first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command.

[0407] The first CFRA resource information includes at least one or more of the following:

[0408] 1) Random Access Preamble Index;

[0409] 2)SSB index;

[0410] 3)PRACH Mask Index;

[0411] 4)SUL / UL.

[0412] (2) second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration; wherein the RRC configuration is an LTM candidate cell configuration preconfigured by the network node.

[0413] The second CFRA resource information includes at least one or more of the following:

[0414] 1) SSB index or CSI-RS index;

[0415] 2) Random access preamble index;

[0416] 3) Random Access Occasion;

[0417] 4) RSRP threshold, where the RSRP threshold can be a threshold related to SSB or a threshold related to CSI-RS.

[0418] (3) CBRA resource information: CBRA resource information is resource information corresponding to CBRA resources.

[0419] The CBRA resource information includes at least one or more of the following:

[0420] SSB index or CSI-RS index;

[0421] PRACH mask index;

[0422] SUL / UL;

[0423] Random access preamble index;

[0424] Random access timing;

[0425] RSRP threshold.

[0426] (4) first execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cell switch command, and the execution of LTM fails;

[0427] (5) second execution indication information, where the second execution indication information is used to indicate that no SSB or CSI-RS meeting the conditions exists in the CFRA resources configured in the RRC configuration;

[0428] (6) third execution indication information, where the third execution indication information is used to indicate that a qualified SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM;

[0429] (7) Information indicating the source of RACH resources for a RACH attempt. During each RACH attempt recording, the UE may record whether the RACH resources used for this RACH attempt are from the CFRA resources carried in the LTM cellswitch command, from the CFRA resources configured in the RRC configuration, or from the CBRA resources. This may be for a specific SSB or CSI-RS, indicating the source of the RACH resources used for each RACH attempt.

[0430] Optionally, each of the above indication information may be 1-bit indication information. In particular, the RACH resource source indication information may be 1-bit or multi-bit indication information, and may be an enumeration type, such as ENUMERATED{LTM cellswitch command CFRA resource, RRC configuration CFRA resource, CBRA resource}.

[0431] In addition, the critical failure information includes one or more of the following (even if the UE does not record the above critical failure information, the UE may also record one or more of the following critical failure information):

[0432] (1) Failure condition indication information, which is used to indicate the triggering condition (also called cause value) for triggering the recording of the critical failure information, i.e., one or more of the first critical failure condition to the third critical failure condition. The failure condition indication information may be 1 bit or multiple bits, and may also be an enumeration type, such as the first critical failure condition ENUMERATED{true}, and / or the second critical failure condition ENUMERATED{true}, and / or the third critical failure condition ENUMERATED{true};

[0433] (2) L1 measurement configuration information;

[0434] The L1 measurement configuration information includes at least one or more of the following:

[0435] 1)SSB frequency (SSB-Frequency);

[0436] 2) Sub-Carrier Spacing;

[0437] 3)SSB-Periodicity;

[0438] 4)SSB time domain position (SSB-Positions In Burst);

[0439] 5)SSB power (SSB-Power).

[0440] (3) L1 measurement result information, where the L1 measurement result information may include the measurement result of each candidate cell, and the measurement result may be SSB L1-RSRP, CSI-RS L1-RSRP, etc.;

[0441] (4) Source cell information, where the source cell information includes source cell identification information and / or source cell L1 measurement result information. The L1 measurement result information may be SSB L1-RSRP or CSI-RS L1-RSRP, etc. The source cell identification information may be PCI (Physical Cell ID, physical cell ID) + frequency or CGI (Cell Global Identifier, global cell unified identification);

[0442] (5) Target cell information, where the target cell information may include target cell identification information and / or target cell L1 measurement result information. The L1 measurement result information may be SSB L1-RSRP or CSI-RS L1-RSRP, etc. The target cell identification information may be PCI+frequency or CGI;

[0443] (6) Location information, where the location information may include the UE's longitude, latitude, altitude, GPS information, etc.

[0444] (7) LTM candidate cell information, where the LTM candidate cell information may include the identification information of the LTM candidate cell and / or the L1 measurement result information of the candidate cell. The L1 measurement result information may be SSB L1-RSRP, or CSI-RS L1-RSRP, etc. The LTM candidate cell identification information may be PCI+frequency or CGI (the LTM candidate cell identification information and / or the L1 measurement result information of the LTM candidate cell may be recorded in a list format, where each entry in the list is the identification information and / or L1 measurement result information of an LTM candidate cell). Alternatively, an indication information may be added to the L1 or L3 neighboring cell measurement result to indicate that the neighboring cell is an LTM candidate cell.

[0445] The UE records the critical failure information, and may record the critical failure information in the SHR or SPR, or in an existing report (such as a CEF report, an RLF report, etc.), or in a newly introduced report.

[0446] Step 4: The UE sends critical failure record indication information to the network node, wherein the critical failure record indication information is used to indicate that the UE has recorded critical failure information.

[0447] Step 5: The network node receives the critical failure record indication information sent by the UE and sends a UE information request message to the UE.

[0448] Step 6: The UE receives the UE information request message sent by the network node and sends a UE information response message to the network node, wherein the UE information response message carries critical failure information.

[0449] Step 7: The network node receives a UE information response message sent by the UE, wherein the UE information response message carries critical failure information.

[0450] In step 8, the network node may perform LTM critical failure optimization based on the critical failure information; alternatively, the network node may forward the critical failure information to relevant network nodes via interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information. The interface signaling may be one or more of Xn, X2, F1, and E1 interface signaling, and the relevant network nodes may be network nodes capable of LTM critical failure optimization.

[0451] Example 2:

[0452] Step 1: The network node sends configuration information to the UE. The configuration information is used to instruct the UE to record and feedback critical failure information to the network node when LTM is successfully executed and the critical failure condition is met. The configuration information includes at least one or more of the following:

[0453] Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fourth critical failure condition is met;

[0454] Fourth critical failure condition: The LTM cell switch command carries a TA value, and the UE successfully executes RACH-less LTM using the measured TA value;

[0455] Fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fifth critical failure condition is met;

[0456] Fifth critical failure condition: The LTM cell switch command carries a TA value and the UE successfully executes RACH-based LTM;

[0457] Sixth feedback indication information, the sixth feedback indication information is used to instruct the UE to record and feedback critical failure information to the network node when LTM is successfully executed and a sixth critical failure condition is met;

[0458] Sixth critical failure condition: The UE is configured with early TA (early timing advance) measurement and the UE successfully performs RACH-based LTM;

[0459] Optionally, the above indication information may be 1-bit indication information.

[0460] Step 2: The UE receives the LTM cell switch command sent by the network node. The UE executes LTM successfully and meets one or more of the following critical failure conditions:

[0461] Fourth critical failure condition: The LTM cell switch command carries a TA value, and the UE successfully executes RACH-less LTM using the measured TA value;

[0462] Fifth critical failure condition: The LTM cell switch command carries a TA value and the UE successfully executes RACH-based LTM;

[0463] Sixth critical failure condition: The UE is configured with early TA (early timing advance) measurement and the UE successfully performs RACH-based LTM.

[0464] Step 3: The UE records critical failure information. The critical failure information includes one or more of the following:

[0465] (1) First TA indication information and / or first TA value. The first TA indication information is used to indicate whether the LTM cell switch command carries a TA value. The first TA value is the TA value carried in the LTM cell switch command.

[0466] (2) second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is the TA value measured by the UE;

[0467] (3) third TA indication information, which is used to indicate whether the TA value carried in the LTM cell switch command is invalid;

[0468] (4) Fourth TA indication information: The fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

[0469] Optionally, each of the above indication information may be 1-bit indication information.

[0470] In addition, the critical failure information includes one or more of the following (even if the UE does not record the above critical failure information, the UE may also record one or more of the following critical failure information):

[0471] (1) Failure condition indication information, which is used to indicate the triggering condition (also called cause value) for triggering the recording of the critical failure information, i.e., one or more of the fourth critical failure condition to the sixth critical failure condition. The failure condition indication information may be 1 bit or multiple bits, and may also be an enumeration type, such as the fourth critical failure condition ENUMERATED{true}, and / or the fifth critical failure condition ENUMERATED{true}, and / or the sixth critical failure condition ENUMERATED{true};

[0472] (2) L1 measurement configuration information;

[0473] The L1 measurement configuration information includes at least one or more of the following:

[0474] 1)SSB frequency (SSB-Frequency);

[0475] 2) Sub-Carrier Spacing;

[0476] 3)SSB-Periodicity;

[0477] 4)SSB time domain position (SSB-Positions In Burst);

[0478] 5)SSB power (SSB-Power).

[0479] (3) L1 measurement result information, where the L1 measurement result information may include the measurement result of each candidate cell, and the measurement result may be SSB L1-RSRP, CSI-RS L1-RSRP, etc.;

[0480] (4) Source cell information, where the source cell information includes source cell identification information and / or source cell L1 measurement result information. The L1 measurement result information may be SSB L1-RSRP or CSI-RS L1-RSRP, etc. The source cell identification information may be PCI (Physical Cell ID, physical cell ID) + frequency or CGI (Cell Global Identifier, global cell unified identification);

[0481] (5) Target cell information, where the target cell information may include target cell identification information and / or target cell L1 measurement result information. The L1 measurement result information may be SSB L1-RSRP or CSI-RS L1-RSRP, etc. The target cell identification information may be PCI+frequency or CGI;

[0482] (6) Location information, where the location information may include the UE's longitude, latitude, altitude, GPS information, etc.

[0483] (7) LTM candidate cell information, where the LTM candidate cell information may include the identification information of the LTM candidate cell and / or the L1 measurement result information of the candidate cell. The L1 measurement result information may be SSB L1-RSRP, or CSI-RS L1-RSRP, etc. The LTM candidate cell identification information may be PCI+frequency or CGI (the LTM candidate cell identification information and / or the L1 measurement result information of the LTM candidate cell may be recorded in a list format, where each entry in the list is the identification information and / or L1 measurement result information of an LTM candidate cell). Alternatively, an indication information may be added to the L1 or L3 neighboring cell measurement result to indicate that the neighboring cell is an LTM candidate cell.

[0484] The UE records the critical failure information, and may record the critical failure information in the SHR or SPR, or in an existing report (such as a CEF report, an RLF report, etc.), or in a newly introduced report.

[0485] Step 4: The UE sends critical failure record indication information to the network node, wherein the critical failure record indication information is used to indicate that the UE has recorded critical failure information.

[0486] Step 5: The network node receives the critical failure record indication information sent by the UE and sends a UE information request message to the UE.

[0487] Step 6: The UE receives the UE information request message sent by the network node and sends a UE information response message to the network node, wherein the UE information response message carries critical failure information.

[0488] Step 7: The network node receives a UE information response message sent by the UE, wherein the UE information response message carries critical failure information.

[0489] In step 8, the network node may perform LTM critical failure optimization based on the critical failure information; alternatively, the network node may forward the critical failure information to relevant network nodes via interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information. The interface signaling may be one or more of Xn, X2, F1, and E1 interface signaling, and the relevant network nodes may be network nodes capable of LTM critical failure optimization.

[0490] Example 3:

[0491] Step 1: The network node sends configuration information to the UE. The configuration information is used to instruct the UE to record and feedback critical failure information to the network node when LTM is successfully executed and the critical failure condition is met. The configuration information includes at least one or more of the following:

[0492] First stay duration threshold;

[0493] Second stay duration threshold.

[0494] Optionally, the first stay time threshold and the second stay time threshold may be specific time lengths, and the units may be milliseconds, seconds, etc.

[0495] Step 2: The UE receives the LTM cell switch command sent by the network node. The UE executes LTM successfully and meets one or more of the following critical failure conditions:

[0496] Seventh critical failure condition: The duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell;

[0497] Eighth critical failure condition: The UE's dwell time in the target cell is less than the second dwell time threshold, and the UE changes from the target cell to a non-source cell, where the non-source cell is a third cell other than the source cell and the target cell.

[0498] Step 3: The UE records critical failure information. The critical failure information includes one or more of the following:

[0499] (1) The duration of the UE's stay in the target cell; for example, for ping-pong handover, the duration of the UE's stay in the target cell before returning to the source cell is recorded; or for short of stay, the duration of the UE's stay in the target cell before accessing a third cell that is neither the source nor the target cell is recorded;

[0500] (2) Cell indication information: The cell indication information is used to indicate that the UE has experienced a cell ping-pong reselection (such as a ping-pong handover) or a short time to access the target cell. This indication information can be the same indication information or separate different indication information for the ping-pong reselection or the short time to access the target cell. This cell indication information can also be recorded as a cause value that triggers the recording of this critical failure information;

[0501] (3) Identification information of the cell where ping-pong reselection occurs; this may include identification information of the source cell or identification information of the target cell where ping-pong reselection occurs;

[0502] (4) Cell identification information of a cell that has been accessed to the target cell for a short time, which may include source cell identification information, target cell identification information, or third cell identification information, where the third cell is a cell that the UE newly accesses after having been accessed to the target cell for a short time;

[0503] (5) The time interval between the last LTM cell switch command received and the current LTM cell switch command received.

[0504] Optionally, each of the above indication information may be 1 bit or multiple bits of indication information, and the units of the above time interval and dwell time may be milliseconds or seconds.

[0505] In addition, the critical failure information includes one or more of the following (even if the UE does not record the above critical failure information, the UE may also record one or more of the following critical failure information):

[0506] (1) Failure condition indication information, which is used to indicate the triggering condition (also called the cause value) for triggering the recording of the critical failure information, i.e., one or more of the seventh critical failure condition to the eighth critical failure condition. The failure condition indication information may be 1 bit or multiple bits, and may also be an enumeration type, such as the seventh critical failure condition ENUMERATED{true} and / or the eighth critical failure condition ENUMERATED{true};

[0507] (2) L1 measurement configuration information;

[0508] The L1 measurement configuration information includes at least one or more of the following:

[0509] 1)SSB frequency (SSB-Frequency);

[0510] 2) Sub-Carrier Spacing;

[0511] 3)SSB-Periodicity;

[0512] 4)SSB time domain position (SSB-Positions In Burst);

[0513] 5)SSB power (SSB-Power).

[0514] (3) L1 measurement result information, where the L1 measurement result information may include the measurement result of each candidate cell, and the measurement result may be SSB L1-RSRP, CSI-RS L1-RSRP, etc.;

[0515] (4) Source cell information, where the source cell information includes source cell identification information and / or source cell L1 measurement result information. The L1 measurement result information may be SSB L1-RSRP or CSI-RS L1-RSRP, etc. The source cell identification information may be PCI (Physical Cell ID, physical cell ID) + frequency or CGI (Cell Global Identifier, global cell unified identification);

[0516] (5) Target cell information, where the target cell information may include target cell identification information and / or target cell L1 measurement result information. The L1 measurement result information may be SSB L1-RSRP or CSI-RS L1-RSRP, etc. The target cell identification information may be PCI+frequency or CGI;

[0517] (6) Location information, where the location information may include the UE's longitude, latitude, altitude, GPS information, etc.

[0518] (7) LTM candidate cell information, where the LTM candidate cell information may include the identification information of the LTM candidate cell and / or the L1 measurement result information of the candidate cell. The L1 measurement result information may be SSB L1-RSRP, or CSI-RS L1-RSRP, etc. The LTM candidate cell identification information may be PCI+frequency or CGI (the LTM candidate cell identification information and / or the L1 measurement result information of the LTM candidate cell may be recorded in a list format, where each entry in the list is the identification information and / or L1 measurement result information of an LTM candidate cell). Alternatively, an indication information may be added to the L1 or L3 neighboring cell measurement result to indicate that the neighboring cell is an LTM candidate cell.

[0519] The UE records the critical failure information, and may record the critical failure information in the SHR or SPR, or in an existing report (such as a CEF report, an RLF report, etc.), or in a newly introduced report.

[0520] Step 4: The UE sends critical failure record indication information to the network node, wherein the critical failure record indication information is used to indicate that the UE has recorded critical failure information.

[0521] Step 5: The network node receives the critical failure record indication information sent by the UE and sends a UE information request message to the UE.

[0522] Step 6: The UE receives the UE information request message sent by the network node and sends a UE information response message to the network node, wherein the UE information response message carries critical failure information.

[0523] Step 7: The network node receives a UE information response message sent by the UE, wherein the UE information response message carries critical failure information.

[0524] In step 8, the network node may perform LTM critical failure optimization based on the critical failure information; alternatively, the network node may forward the critical failure information to relevant network nodes via interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information. The interface signaling may be one or more of Xn, X2, F1, and E1 interface signaling, and the relevant network nodes may be network nodes capable of LTM critical failure optimization.

[0525] This application provides a method for reporting critical failure information. When a UE successfully executes LTM and meets preset critical failure conditions, the UE records the critical failure information and sends it to a network node. The network node then performs LTM critical failure optimization based on the critical failure information. In this way, the network node performs LTM critical failure optimization based on the critical failure information reported by the UE, thereby avoiding subsequent LTM failures caused by the risk of critical failure.

[0526] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. For related parts, please refer to the description of other method embodiments.

[0527] The embodiment of the present application further provides a UE, such as Figure 3 As shown, it includes a memory 310, a transceiver 320 and a processor 330;

[0528] The memory 310 is used to store computer programs; the transceiver 320 is used to send and receive data under the control of the processor 330; and the processor 330 is used to read the computer program in the memory 310 and perform the following operations:

[0529] When the UE successfully executes LTM and meets the preset critical failure condition, the critical failure information is recorded and sent to the network node.

[0530] As an optional implementation, the critical failure condition includes at least one or more of the following:

[0531] First critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using the CFRA resources in the RRC configuration;

[0532] Second critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using CBRA resources;

[0533] Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using CBRA resources;

[0534] Fourth critical failure condition: The LTM cell switch command carries a TA value, and the UE successfully executes RACH-less LTM using the measured TA value;

[0535] Fifth critical failure condition: The LTM cell switch command carries a TA value and the UE successfully executes RACH-based LTM;

[0536] Sixth critical failure condition: The UE is configured with early TA measurement and the UE successfully performs RACH-based LTM;

[0537] Seventh critical failure condition: The duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell;

[0538] Eighth critical failure condition: the duration of the UE's access to the target cell is less than the second duration threshold, and the UE changes from the target cell to a non-source cell.

[0539] As an optional implementation, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following:

[0540] First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command;

[0541] Second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration;

[0542] CBRA resource information, which is resource information corresponding to CBRA resources;

[0543] First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cell switch command, and the execution of LTM fails;

[0544] Second execution indication information, where the second execution indication information is used to indicate that there is no SSB or CSI-RS meeting the conditions in the CFRA resources configured in the RRC configuration;

[0545] The third execution indication information is used to indicate that a qualified SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM;

[0546] Indication of the source of RACH resources for the RACH attempt.

[0547] As an optional implementation, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following:

[0548] First TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cell switch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command;

[0549] Second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE;

[0550] Third TA indication information, the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid;

[0551] The fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

[0552] As an optional implementation, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following:

[0553] The duration of the UE's stay in the target cell;

[0554] Cell indication information: The cell indication information is used to indicate that the UE has experienced a cell ping-pong reselection or a short time to access the target cell;

[0555] Identification information of the cell where ping-pong reselection occurred;

[0556] Cell identification information of the target cell with the shortest access time;

[0557] The interval between the last LTM cell switch command and the current LTM cell switch command.

[0558] As an optional implementation, the critical failure information includes one or more of the following:

[0559] Failure condition indication information, which is used to indicate the critical failure condition that is successfully met when executing the LTM;

[0560] L1 measurement configuration information;

[0561] L1 measurement result information;

[0562] Source cell information;

[0563] Target cell information;

[0564] Location information;

[0565] LTM candidate cell information.

[0566] As an optional implementation manner, the first CFRA resource information includes at least one or more of the following:

[0567] Random access preamble index;

[0568] SSB index;

[0569] PRACH mask index;

[0570] SUL / UL.

[0571] As an optional implementation manner, the second CFRA resource information includes at least one or more of the following:

[0572] SSB index or CSI-RS index;

[0573] Random access preamble index;

[0574] Random access timing;

[0575] RSRP threshold.

[0576] As an optional implementation, the CBRA resource information includes at least one or more of the following:

[0577] SSB index or CSI-RS index;

[0578] PRACH mask index;

[0579] SUL / UL;

[0580] Random access preamble index;

[0581] Random access timing;

[0582] RSRP threshold.

[0583] As an optional implementation manner, the L1 measurement configuration information includes at least one or more of the following:

[0584] SSB frequency;

[0585] subcarrier spacing;

[0586] SSB cycle;

[0587] SSB time domain position;

[0588] SSB power.

[0589] As an optional implementation manner, the processor 330 is further configured to read the computer program in the memory 310 and perform the following operations:

[0590] Receive configuration information sent by the network node, where the configuration information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a critical failure condition is met.

[0591] As an optional implementation manner, the configuration information includes at least one or more of the following:

[0592] First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a first critical failure condition is met;

[0593] Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and the second critical failure condition is met;

[0594] Third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a third critical failure condition is met;

[0595] Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fourth critical failure condition is met;

[0596] Fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fifth critical failure condition is met;

[0597] Sixth feedback indication information, the sixth feedback indication information is used to instruct the UE to record and feedback critical failure information to the network node when LTM is successfully executed and a sixth critical failure condition is met;

[0598] First stay duration threshold;

[0599] Second stay duration threshold.

[0600] As an optional implementation, recording critical failure information includes:

[0601] Record critical failure information in the SHR or SPR, either in an existing report or in a new report.

[0602] As an optional implementation, sending critical failure information to a network node includes:

[0603] receiving a UE information request message sent by a network node;

[0604] A UE information response message is sent to the network node, where the UE information response message carries critical failure information.

[0605] As an optional implementation manner, before sending the critical failure information to the network node, the processor 330 is further configured to read the computer program in the memory 310 and perform the following operations:

[0606] Send critical failure record indication information to the network node, where the critical failure record indication information is used to indicate that the UE has recorded critical failure information.

[0607] The embodiment of the present application also provides a network node, such as Figure 4 As shown, it includes a memory 410, a transceiver 420 and a processor 430;

[0608] The memory 410 is used to store computer programs; the transceiver 420 is used to send and receive data under the control of the processor 430; and the processor 430 is used to read the computer program in the memory 410 and perform the following operations:

[0609] Acquire critical failure information recorded by the UE. The critical failure information is recorded when the UE successfully executes LTM and meets a preset critical failure condition.

[0610] As an optional implementation manner, obtaining critical failure information recorded by the UE includes:

[0611] Sending a UE information request message to the UE;

[0612] A UE information response message sent by the UE is received, where the UE information response message carries critical failure information.

[0613] As an optional implementation manner, obtaining critical failure information recorded by the UE includes:

[0614] In response to the critical failure record indication information sent by the UE, the critical failure information recorded by the UE is acquired, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0615] As an optional implementation manner, the processor 430 is further configured to read the computer program in the memory 410 and perform the following operations:

[0616] Perform LTM critical failure optimization based on critical failure information; or forward the critical failure information to relevant network nodes through interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

[0617] The embodiment of the present application also provides a device for reporting critical failure information, such as Figure 5 As shown, the device is applied to UE, and the device includes:

[0618] The first sending unit 510 is configured to record critical failure information and send the critical failure information to a network node when the UE successfully executes LTM and meets a preset critical failure condition.

[0619] As an optional implementation, the critical failure condition includes at least one or more of the following:

[0620] First critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using the CFRA resources in the RRC configuration;

[0621] Second critical failure condition: The LTM cell switch command carries CFRA resources, and the UE successfully executes LTM using CBRA resources;

[0622] Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using CBRA resources;

[0623] Fourth critical failure condition: The LTM cell switch command carries a TA value, and the UE successfully executes RACH-less LTM using the measured TA value;

[0624] Fifth critical failure condition: The LTM cell switch command carries a TA value and the UE successfully executes RACH-based LTM;

[0625] Sixth critical failure condition: The UE is configured with early TA measurement and the UE successfully performs RACH-based LTM;

[0626] Seventh critical failure condition: The duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell;

[0627] Eighth critical failure condition: the duration of the UE's access to the target cell is less than the second duration threshold, and the UE changes from the target cell to a non-source cell.

[0628] As an optional implementation, when the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following:

[0629] First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command;

[0630] Second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration;

[0631] CBRA resource information, which is resource information corresponding to CBRA resources;

[0632] First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cell switch command, and the execution of LTM fails;

[0633] Second execution indication information, where the second execution indication information is used to indicate that there is no SSB or CSI-RS meeting the conditions in the CFRA resources configured in the RRC configuration;

[0634] The third execution indication information is used to indicate that a qualified SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM;

[0635] Indication of the source of RACH resources for the RACH attempt.

[0636] As an optional implementation, when the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following:

[0637] First TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cell switch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command;

[0638] Second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE;

[0639] Third TA indication information, the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid;

[0640] The fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

[0641] As an optional implementation, when the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following:

[0642] The duration of the UE's stay in the target cell;

[0643] Cell indication information: The cell indication information is used to indicate that the UE has experienced a cell ping-pong reselection or a short time to access the target cell;

[0644] Identification information of the cell where ping-pong reselection occurs;

[0645] Cell identification information of the target cell with the shortest access time;

[0646] The interval between the last LTM cell switch command and the current LTM cell switch command.

[0647] As an optional implementation, the critical failure information includes one or more of the following:

[0648] Failure condition indication information, which is used to indicate the critical failure condition that is successfully met when executing the LTM;

[0649] L1 measurement configuration information;

[0650] L1 measurement result information;

[0651] Source cell information;

[0652] Target cell information;

[0653] Location information;

[0654] LTM candidate cell information.

[0655] As an optional implementation manner, the first CFRA resource information includes at least one or more of the following:

[0656] Random access preamble index;

[0657] SSB index;

[0658] PRACH mask index;

[0659] SUL / UL.

[0660] As an optional implementation manner, the second CFRA resource information includes at least one or more of the following:

[0661] SSB index or CSI-RS index;

[0662] Random access preamble index;

[0663] Random access timing;

[0664] RSRP threshold.

[0665] As an optional implementation, the CBRA resource information includes at least one or more of the following:

[0666] SSB index or CSI-RS index;

[0667] PRACH mask index;

[0668] SUL / UL;

[0669] Random access preamble index;

[0670] Random access timing;

[0671] RSRP threshold.

[0672] As an optional implementation manner, the L1 measurement configuration information includes at least one or more of the following:

[0673] SSB frequency;

[0674] subcarrier spacing;

[0675] SSB cycle;

[0676] SSB time domain position;

[0677] SSB power.

[0678] As an optional embodiment, the device further includes:

[0679] The receiving unit is configured to receive configuration information sent by a network node, where the configuration information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a critical failure condition is met.

[0680] As an optional implementation manner, the configuration information includes at least one or more of the following:

[0681] First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a first critical failure condition is met;

[0682] Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and the second critical failure condition is met;

[0683] Third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a third critical failure condition is met;

[0684] Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fourth critical failure condition is met;

[0685] Fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back critical failure information to the network node when LTM is successfully executed and a fifth critical failure condition is met;

[0686] Sixth feedback indication information, the sixth feedback indication information is used to instruct the UE to record and feedback critical failure information to the network node when LTM is successfully executed and a sixth critical failure condition is met;

[0687] First stay duration threshold;

[0688] Second stay duration threshold.

[0689] As an optional implementation manner, the first sending unit 510 is specifically configured to:

[0690] Record critical failure information in the SHR or SPR, either in an existing report or in a new report.

[0691] As an optional implementation manner, the first sending unit 510 is specifically configured to:

[0692] receiving a UE information request message sent by a network node;

[0693] A UE information response message is sent to the network node, where the UE information response message carries critical failure information.

[0694] As an optional embodiment, the device further includes:

[0695] The second sending unit is configured to send critical failure record indication information to the network node, where the critical failure record indication information is used to indicate that the UE has recorded critical failure information.

[0696] The embodiment of the present application also provides a device for reporting critical failure information, such as Figure 6 As shown, the device is applied to a network node, and the device includes:

[0697] The acquiring unit 610 is configured to acquire critical failure information recorded by the UE, where the critical failure information is recorded when the UE successfully executes LTM and satisfies a preset critical failure condition.

[0698] As an optional implementation manner, the acquiring unit 610 is specifically configured to:

[0699] Sending a UE information request message to the UE;

[0700] A UE information response message sent by the UE is received, where the UE information response message carries critical failure information.

[0701] As an optional implementation manner, the acquiring unit 610 is specifically configured to:

[0702] In response to the critical failure record indication information sent by the UE, the critical failure information recorded by the UE is acquired, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

[0703] As an optional embodiment, the device further includes:

[0704] The optimization unit is configured to perform LTM critical failure optimization based on the critical failure information; or, to forward the critical failure information to relevant network nodes through interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

[0705] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0706] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the part that essentially contributes to the technical solution of the present application or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application.

[0707] It should be noted here that the above-mentioned device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0708] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned method for reporting critical failure information are implemented.

[0709] The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid-state drives (SSDs)), etc.

[0710] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) that contain computer-usable program code.

[0711] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0712] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce an article of manufacture comprising an instruction device that implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0713] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A method for reporting critical failure information, characterized in that: The method is applied to user equipment UE, and the method includes: When the UE successfully executes the L1 / L2 triggered mobility LTM and meets a preset critical failure condition, critical failure information is recorded and sent to a network node.

2. The method according to claim 1, characterized in that The critical failure conditions include at least one or more of the following: First critical failure condition: the LTM cell switch command carries non-contention random access CFRA resources, and the UE successfully executes LTM using the CFRA resources in the radio resource control RRC configuration; Second critical failure condition: the LTM cell switch command carries CFRA resources, and the UE successfully performs LTM using contention random access CBRA resources; Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using the CBRA resources; Fourth critical failure condition: the LTM cell switch command carries a timing advance (TA) value, and the UE successfully performs RACH-less LTM using the measured TA value; Fifth critical failure condition: the LTM cell switch command carries a TA value, and the UE successfully executes RACH-based LTM; Sixth critical failure condition: the UE is configured with early TA measurement and the UE successfully performs RACH-based LTM; Seventh critical failure condition: the duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell; Eighth critical failure condition: the duration of the UE's access to the target cell is less than a second duration threshold, and the UE changes from the target cell to a non-source cell.

3. The method according to claim 2, characterized in that In the case where the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following: First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command; Second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration; CBRA resource information, where the CBRA resource information is resource information corresponding to the CBRA resource; First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cellswitch command, and the execution of LTM fails; Second execution indication information, where the second execution indication information is used to indicate that there is no synchronization signal / physical broadcast channel SSB or downlink channel state information reference signal CSI-RS that meets the conditions in the CFRA resources configured in the RRC configuration; third execution indication information, where the third execution indication information is used to indicate that a satisfying SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM; Source indication information of the RACH resource for the random access channel RACH attempt.

4. The method according to claim 2, characterized in that When the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following: first TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cell switch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command; second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE; third TA indication information, where the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid; Fourth TA indication information, where the fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

5. The method according to claim 2, characterized in that When the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following: The duration of the UE's stay in the target cell; Cell indication information, where the cell indication information is used to indicate that the UE has experienced cell ping-pong reselection or has a short access time to a target cell; Identification information of the cell where ping-pong reselection occurs; Cell identification information of the target cell with the shortest access time; The interval between the last LTM cell switch command and the current LTM cell switch command.

6. The method according to any one of claims 1 to 5, characterized in that The critical failure information includes one or more of the following: Failure condition indication information, the failure condition indication information is used to indicate the triggering condition for triggering the recording of the critical failure information; L1 measurement configuration information; L1 measurement result information; Source cell information; Target cell information; Location information; LTM candidate cell information.

7. The method according to claim 3, characterized in that The first CFRA resource information includes at least one or more of the following: Random access preamble index; SSB index; Physical random access channel PRACH mask index; Supplementary Uplink SUL / Uplink UL.

8. The method according to claim 3, characterized in that The second CFRA resource information includes at least one or more of the following: SSB index or CSI-RS index; Random access preamble index; Random access timing; Reference signal received power RSRP threshold.

9. The method according to claim 3, characterized in that The CBRA resource information includes at least one or more of the following: SSB index or CSI-RS index; PRACH mask index; SUL / UL; Random access preamble index; Random access timing; RSRP threshold.

10. The method according to claim 6, characterized in that The L1 measurement configuration information includes at least one or more of the following: SSB frequency; subcarrier spacing; SSB cycle; SSB time domain position; SSB power.

11. The method according to claim 2, characterized in that The method further comprises: Receive configuration information sent by the network node, where the configuration information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the critical failure condition is met.

12. The method according to claim 11, characterized in that The configuration information includes at least one or more of the following: First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the first critical failure condition is met; Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the second critical failure condition is met; third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the third critical failure condition is met; Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the fourth critical failure condition is met; fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the fifth critical failure condition is met; Sixth feedback indication information, where the sixth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the sixth critical failure condition is met; the first stay duration threshold; The second stay duration threshold.

13. The method according to claim 1, wherein The recording of critical failure information includes: The critical failure information is recorded in a successful handover report SHR or a successful PSCell change or addition report SPR, or in an existing report or a new report.

14. The method according to claim 1, wherein The sending the critical failure information to the network node includes: receiving a UE information request message sent by the network node; A UE information response message is sent to the network node, where the UE information response message carries the critical failure information.

15. The method according to claim 1 or 14, characterized in that Before sending the critical failure information to the network node, the method further includes: Sending critical failure record indication information to the network node, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

16. A method for reporting critical failure information, characterized in that: The method is applied to a network node, and the method includes: Critical failure information recorded by a user equipment (UE) is obtained, where the critical failure information is recorded when the UE successfully performs L1 / L2 triggered mobility LTM and satisfies a preset critical failure condition.

17. The method according to claim 16, characterized in that The obtaining of critical failure information recorded by the UE includes: Sending a UE information request message to the UE; A UE information response message sent by the UE is received, where the UE information response message carries the critical failure information.

18. The method according to claim 16 or 17, characterized in that The obtaining of critical failure information recorded by the UE includes: In response to the critical failure record indication information sent by the UE, the critical failure information recorded by the UE is acquired, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

19. The method according to claim 16, wherein The method further comprises: Perform LTM critical failure optimization based on the critical failure information; or forward the critical failure information to relevant network nodes through interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

20. A user equipment UE, characterized in that: including memory, transceiver and processor; The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; and the processor is used to read the computer program in the memory and perform the following operations: When the UE successfully executes the L1 / L2 triggered mobility LTM and meets a preset critical failure condition, critical failure information is recorded and sent to a network node.

21. The UE according to claim 20, wherein: The critical failure conditions include at least one or more of the following: First critical failure condition: the LTM cell switch command carries non-contention random access CFRA resources, and the UE successfully executes LTM using the CFRA resources in the radio resource control RRC configuration; Second critical failure condition: the LTM cell switch command carries CFRA resources, and the UE successfully performs LTM using contention random access CBRA resources; Third critical failure condition: CFRA resources are configured in the RRC configuration, and the UE successfully performs LTM using the CBRA resources; Fourth critical failure condition: the LTM cell switch command carries a timing advance (TA) value, and the UE successfully performs RACH-less LTM using the measured TA value; Fifth critical failure condition: the LTM cell switch command carries a TA value, and the UE successfully executes RACH-based LTM; Sixth critical failure condition: the UE is configured with early TA measurement and the UE successfully performs RACH-based LTM; Seventh critical failure condition: the duration of the UE's access to the target cell is less than the first duration threshold, and the UE changes from the target cell to the source cell; Eighth critical failure condition: the duration of the UE's access to the target cell is less than a second duration threshold, and the UE changes from the target cell to a non-source cell.

22. The UE according to claim 21, wherein: In the case where the critical failure condition is the first critical failure condition and / or the second critical failure condition and / or the third critical failure condition, the critical failure information includes one or more of the following: First CFRA resource indication information and / or first CFRA resource information, where the first CFRA resource indication information is used to indicate whether the LTM cell switch command carries a CFRA resource, and the first CFRA resource information is resource information corresponding to the CFRA resource carried in the LTM cell switch command; Second CFRA resource indication information and / or second CFRA resource information, where the second CFRA resource indication information is used to indicate whether CFRA resources are configured in the RRC configuration, and the second CFRA resource information is resource information corresponding to the CFRA resources configured in the RRC configuration; CBRA resource information, where the CBRA resource information is resource information corresponding to the CBRA resource; First execution instruction information, where the first execution instruction information is used to instruct the UE to execute LTM using the CFRA resources carried in the LTM cellswitch command, and the execution of LTM fails; Second execution indication information, where the second execution indication information is used to indicate that there is no synchronization signal / physical broadcast channel SSB or downlink channel state information reference signal CSI-RS that meets the conditions in the CFRA resources configured in the RRC configuration; third execution indication information, where the third execution indication information is used to indicate that a satisfying SSB or CSI-RS exists in the CFRA resource configured in the RRC configuration, and that the UE fails to execute LTM; Source indication information of the RACH resource for the random access channel RACH attempt.

23. The UE according to claim 21, wherein: When the critical failure condition is the fourth critical failure condition and / or the fifth critical failure condition and / or the sixth critical failure condition, the critical failure information includes one or more of the following: first TA indication information and / or a first TA value, where the first TA indication information is used to indicate whether the LTM cell switch command carries a TA value, and the first TA value is the TA value carried in the LTM cell switch command; second TA indication information and / or a second TA value, where the second TA indication information is used to indicate whether the UE is configured to perform TA measurement in the RRC configuration, and the second TA value is a TA value measured by the UE; third TA indication information, where the third TA indication information is used to indicate whether the TA value carried in the LTM cell switch command is invalid; Fourth TA indication information, where the fourth TA indication information is used to indicate whether the TA value measured by the UE is invalid.

24. The UE according to claim 21, wherein: When the critical failure condition is the seventh critical failure condition and / or the eighth critical failure condition, the critical failure information includes one or more of the following: The duration of the UE's stay in the target cell; Cell indication information, where the cell indication information is used to indicate that the UE has experienced cell ping-pong reselection or has a short access time to a target cell; Identification information of the cell where ping-pong reselection occurs; Cell identification information of the target cell with the shortest access time; The interval between the last LTM cell switch command and the current LTM cell switch command.

25. The UE according to any one of claims 20 to 24, characterized in that The critical failure information includes one or more of the following: Failure condition indication information, the failure condition indication information is used to indicate the triggering condition for triggering the recording of the critical failure information; L1 measurement configuration information; L1 measurement result information; Source cell information; Target cell information; Location information; LTM candidate cell information.

26. The UE according to claim 22, wherein: The first CFRA resource information includes at least one or more of the following: Random access preamble index; SSB index; Physical random access channel PRACH mask index; Supplementary Uplink SUL / Uplink UL.

27. The UE according to claim 22, wherein: The second CFRA resource information includes at least one or more of the following: SSB index or CSI-RS index; Random access preamble index; Random access timing; Reference signal received power RSRP threshold.

28. The UE according to claim 22, wherein: The CBRA resource information includes at least one or more of the following: SSB index or CSI-RS index; PRACH mask index; SUL / UL; Random access preamble index; Random access timing; RSRP threshold.

29. The UE according to claim 25, wherein: The L1 measurement configuration information includes at least one or more of the following: SSB frequency; subcarrier spacing; SSB cycle; SSB time domain position; SSB power.

30. The UE according to claim 21, wherein: The processor is further configured to read the computer program in the memory and perform the following operations: Receive configuration information sent by the network node, where the configuration information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the critical failure condition is met.

31. The UE according to claim 30, wherein: The configuration information includes at least one or more of the following: First feedback indication information, where the first feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the first critical failure condition is met; Second feedback indication information, where the second feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the second critical failure condition is met; third feedback indication information, where the third feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the third critical failure condition is met; Fourth feedback indication information, where the fourth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when the LTM is successfully performed and the fourth critical failure condition is met; fifth feedback indication information, where the fifth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the fifth critical failure condition is met; Sixth feedback indication information, where the sixth feedback indication information is used to instruct the UE to record and feed back the critical failure information to the network node when LTM is successfully performed and the sixth critical failure condition is met; the first stay duration threshold; The second stay duration threshold.

32. The UE according to claim 20, wherein: The recording of critical failure information includes: The critical failure information is recorded in a successful handover report SHR or a successful PSCell change or addition report SPR, or in an existing report or a new report.

33. The UE according to claim 20, wherein: The sending the critical failure information to the network node includes: receiving a UE information request message sent by the network node; A UE information response message is sent to the network node, where the UE information response message carries the critical failure information.

34. The UE according to claim 20 or 33, wherein: Before sending the critical failure information to the network node, the processor is further configured to read the computer program in the memory and perform the following operations: Sending critical failure record indication information to the network node, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

35. A network node, characterized in that: including memory, transceiver and processor; The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; and the processor is used to read the computer program in the memory and perform the following operations: Critical failure information recorded by a user equipment (UE) is obtained, where the critical failure information is recorded when the UE successfully performs L1 / L2 triggered mobility LTM and satisfies a preset critical failure condition.

36. The network node according to claim 35, characterized in that The obtaining of critical failure information recorded by the UE includes: Sending a UE information request message to the UE; A UE information response message sent by the UE is received, where the UE information response message carries the critical failure information.

37. The network node according to claim 35 or 36, characterized in that The obtaining of critical failure information recorded by the UE includes: In response to the critical failure record indication information sent by the UE, the critical failure information recorded by the UE is acquired, where the critical failure record indication information is used to indicate that the UE has recorded the critical failure information.

38. The network node according to claim 35, characterized in that The processor is further configured to read the computer program in the memory and perform the following operations: Perform LTM critical failure optimization based on the critical failure information; or forward the critical failure information to relevant network nodes through interface signaling, so that the relevant network nodes perform LTM critical failure optimization based on the critical failure information.

39. A critical failure information reporting device, characterized in that: The device is applied to a user equipment UE, and includes: The first sending unit is configured to record critical failure information and send the critical failure information to a network node if the UE successfully executes L1 / L2 triggered mobility LTM and meets a preset critical failure condition.

40. A critical failure information reporting device, characterized in that: The device is applied to a network node, and includes: The acquiring unit is configured to acquire critical failure information recorded by a user equipment (UE), where the critical failure information is recorded when the UE successfully performs L1 / L2 triggered mobility LTM and satisfies a preset critical failure condition.

41. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 15 or 16 to 19 are implemented.

Images