Information transmission method, device and equipment

Abstract

The invention provides an information transmission method, device and equipment, and the method comprises the steps: receiving first information transmitted by a centralized unit, and enabling the first information to be used for assisting the MRO related operation; wherein the MRO related operation comprises any one of the following steps: the distributed unit directly executes the MRO operation of the distributed unit according to the first information; if the distributed unit determines that the distributed unit needs to be subjected to the MRO operation after analyzing the first information, executing the MRO operation of the distributed unit; if the distributed unit determines that other network nodes except the distributed unit need to perform MRO operation after analyzing the first information, sending second information to other network nodes; the other network nodes comprise at least one other distributed unit and / or concentration unit except the distributed unit; the second information is used for assisting the MRO operation. Therefore, the problem that the existing network optimization scheme is not suitable for the scene of DU trigger switching is solved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an information transmission method, apparatus, and device. Background Art

[0002] Existing Layer 3 (L3) handovers are triggered by a Central Unit (CU). For handover failure scenarios, the base station that receives the Self-Organizing Network (SON) report sends it to the source base station CU, which then analyzes and optimizes. For scenarios where the handover succeeds but quickly fails (such as a Radio Link Failure (RLF) case), the base station that receives the SON report sends it to the failed node (target node), which then analyzes it. If it determines that the problem lies with the source node, the target node CU sends the SON report to the source node CU, which then performs optimization. However, the above solution does not support network optimization in scenarios where handovers are triggered by a Distributed Unit (DU). Summary of the Invention

[0003] The purpose of the present application is to provide an information transmission method, apparatus and device to solve the problem that the network optimization method in the prior art does not support the scenario of DU triggered switching.

[0004] In order to solve the above technical problems, an embodiment of the present application provides an information transmission method applied to a distributed unit, including:

[0005] receiving first information sent by a centralized unit, where the first information is used to assist in performing a mobility robustness optimization (MRO) related operation;

[0006] Among them, performing MRO-related operations includes any of the following:

[0007] The distributed unit directly performs the MRO operation of the distributed unit according to the first information;

[0008] If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit;

[0009] If the distributed unit determines that other network nodes other than the distributed unit need to perform MRO operations after analyzing the first information, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0010] Optionally, the first information includes at least one of the following:

[0011] Failure type information;

[0012] Mobile information;

[0013] Time threshold information;

[0014] Self-organizing network SON report information;

[0015] Information of a first cell supporting communication of the terminal;

[0016] Information of a first primary and secondary cell supporting communication of the terminal;

[0017] Candidate cell information;

[0018] Information of candidate primary and secondary cells;

[0019] Switching reason value;

[0020] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0021] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0022] Optionally, the SON report information includes at least one of the following:

[0023] Layer 1 or Layer 2 measurement information;

[0024] Restore cell information;

[0025] Candidate cell information;

[0026] Information of candidate primary and secondary cells;

[0027] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0028] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0029] Optionally, analyzing the first information includes:

[0030] Determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal;

[0031] Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication;

[0032] The first network node includes: the distributed unit and / or the other network nodes.

[0033] Optionally, the determining, according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication, the first network node requiring MRO operation includes:

[0034] In a case where the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the first network node requiring the MRO operation includes a source SN-DU of the terminal;

[0035] In a case where the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit;

[0036] When the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, the first network node for performing the MRO operation is determined to include the target SN-DU of the terminal.

[0037] Optionally, the second information includes at least one of the following:

[0038] Failure type information;

[0039] Mobile information;

[0040] Time threshold information;

[0041] SON report information;

[0042] Information of a first cell supporting communication of the terminal;

[0043] Information of a first primary and secondary cell supporting communication of the terminal;

[0044] Information of a second cell supporting communication of the terminal;

[0045] Information of a second primary and secondary cell supporting terminal communication;

[0046] Candidate cell information;

[0047] Information of candidate primary and secondary cells;

[0048] Switching reason value;

[0049] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0050] Optionally, analyzing the first information includes:

[0051] In a case where the connection failure is related to the current handover or to the handover timing triggered by the source side or to the handover failure, determining, according to the RLF report information and / or mobility information in the first information, a second network node on which an MRO operation needs to be performed;

[0052] The second network node includes: the distributed unit and / or other distributed units.

[0053] Optionally, analyzing the first information further includes:

[0054] According to the time threshold information and RLF report information in the first information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0055] Optionally, the receiving the first information sent by the centralized unit includes:

[0056] A handover report message sent by a centralized unit is received, where the handover report message carries the first information.

[0057] Optionally, when the other network node is another distributed unit, the sending the second information to the other network node includes:

[0058] The second information is sent to the other distributed units through the centralized unit.

[0059] The embodiment of the present application further provides an information transmission method, which is applied to a centralized unit and includes:

[0060] Upon receiving the SON report information, sending first information to at least one distributed unit, where the first information is used to assist in performing MRO-related operations;

[0061] Among them, performing MRO-related operations includes any of the following:

[0062] The distributed unit directly performs the MRO operation of the distributed unit according to the first information;

[0063] If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit;

[0064] If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes;

[0065] The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0066] Optionally, the first information includes at least one of the following:

[0067] Failure type information;

[0068] Mobile information;

[0069] Time threshold information;

[0070] Self-organizing network SON report information;

[0071] Information of a first cell supporting communication of the terminal;

[0072] Information of a first primary and secondary cell supporting communication of the terminal;

[0073] Candidate cell information;

[0074] Information of candidate primary and secondary cells;

[0075] Switching reason value;

[0076] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0077] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0078] Optionally, the SON report information includes at least one of the following:

[0079] Layer 1 or Layer 2 measurement information;

[0080] Restore cell information;

[0081] Candidate cell information;

[0082] Information of candidate primary and secondary cells;

[0083] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0084] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0085] Optionally, the method further includes:

[0086] The candidate cells or candidate primary and secondary cells selected by the centralized unit are updated.

[0087] Optionally, the method further includes:

[0088] determining, based on the third information, a third network node on which an MRO operation needs to be performed;

[0089] Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit;

[0090] The third information includes at least one of RLF report information, information of a first cell supporting terminal communication or information of a first primary and secondary cell supporting terminal communication, and information of a second cell supporting terminal communication or information of a second primary and secondary cell supporting terminal communication.

[0091] Optionally, before determining, according to the third information, the third network node on which the MRO operation is to be performed, the method further includes:

[0092] According to the SCG failure information, information about a first cell supporting communication of the terminal or information about a first primary and secondary cell supporting communication of the terminal is determined.

[0093] Optionally, before determining, according to the third information, the third network node on which the MRO operation is to be performed, the method further includes:

[0094] receiving the second information sent by a first distributed unit among the at least one distributed unit according to the first information;

[0095] The first distributed unit is: a secondary node distributed unit SN-DU that provides services to the terminal before RLF, or a source SN-DU of the terminal.

[0096] Optionally, the second information includes at least one of the following:

[0097] Failure type information;

[0098] Mobile information;

[0099] Time threshold information;

[0100] SON report information;

[0101] Information of a first cell supporting communication of the terminal;

[0102] Information of a first primary and secondary cell supporting communication of the terminal;

[0103] Information of a second cell supporting communication of the terminal;

[0104] Information of a second primary and secondary cell supporting terminal communication;

[0105] Candidate cell information;

[0106] Information of candidate primary and secondary cells;

[0107] Switching reason value;

[0108] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0109] Optionally, updating the candidate cell or candidate primary and secondary cells selected by the centralized unit includes:

[0110] The candidate cell or candidate primary and secondary cells selected by the centralization unit is updated according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication.

[0111] Optionally, determining, according to the third information, a third network node on which an MRO operation needs to be performed includes:

[0112] In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes a source SN-DU of the terminal;

[0113] When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit;

[0114] When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

[0115] Optionally, determining, according to the third information, a third network node on which an MRO operation needs to be performed includes:

[0116] In the case that the connection failure is related to the current handover, or is related to the handover timing triggered by the source side, or is related to the handover failure, the third network node that needs to perform the MRO operation is determined according to the third information.

[0117] Optionally, the method further includes:

[0118] According to the time threshold information and the RLF report information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0119] Optionally, the sending the first information to at least one distributed unit includes:

[0120] A handover report message is sent to at least one distributed unit, where the handover report message carries the first information.

[0121] Optionally, the method further includes:

[0122] In a case where the other network node is another distributed unit, the second information is sent to the other distributed unit.

[0123] The embodiment of the present application further provides an information transmission device, which is a distributed unit and includes a memory, a transceiver, and a processor:

[0124] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0125] Receiving, by the transceiver, first information sent by a centralized unit, where the first information is used to assist in performing operations related to mobility robustness optimization (MRO);

[0126] Among them, performing MRO-related operations includes any of the following:

[0127] directly performing the MRO operation of the distributed unit according to the first information;

[0128] If it is determined after analyzing the first information that the distributed unit needs to perform an MRO operation, performing the MRO operation of the distributed unit;

[0129] If it is determined after analyzing the first information that other network nodes other than the distributed unit need to perform MRO operations, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0130] Optionally, the first information includes at least one of the following:

[0131] Failure type information;

[0132] Mobile information;

[0133] Time threshold information;

[0134] Self-organizing network SON report information;

[0135] Information of a first cell supporting communication of the terminal;

[0136] Information of a first primary and secondary cell supporting communication of the terminal;

[0137] Candidate cell information;

[0138] Information of candidate primary and secondary cells;

[0139] Switching reason value;

[0140] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0141] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0142] Optionally, the SON report information includes at least one of the following:

[0143] Layer 1 or Layer 2 measurement information;

[0144] Restore cell information;

[0145] Candidate cell information;

[0146] Information of candidate primary and secondary cells;

[0147] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0148] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0149] Optionally, analyzing the first information includes:

[0150] Determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal;

[0151] Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication;

[0152] The first network node includes: the distributed unit and / or the other network nodes.

[0153] Optionally, the determining, according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication, the first network node requiring MRO operation includes:

[0154] In a case where the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the first network node requiring the MRO operation includes a source SN-DU of the terminal;

[0155] In a case where the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit;

[0156] When the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, the first network node for performing the MRO operation is determined to include the target SN-DU of the terminal.

[0157] Optionally, the second information includes at least one of the following:

[0158] Failure type information;

[0159] Mobile information;

[0160] Time threshold information;

[0161] SON report information;

[0162] Information of a first cell supporting communication of the terminal;

[0163] Information of a first primary and secondary cell supporting communication of the terminal;

[0164] Information of a second cell supporting communication of the terminal;

[0165] Information of a second primary and secondary cell supporting terminal communication;

[0166] Candidate cell information;

[0167] Information of candidate primary and secondary cells;

[0168] Switching reason value;

[0169] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0170] Optionally, analyzing the first information includes:

[0171] In a case where the connection failure is related to the current handover or to the handover timing triggered by the source side or to the handover failure, determining, according to the RLF report information and / or mobility information in the first information, a second network node on which an MRO operation needs to be performed;

[0172] The second network node includes: the distributed unit and / or other distributed units.

[0173] Optionally, analyzing the first information further includes:

[0174] According to the time threshold information and RLF report information in the first information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0175] Optionally, the receiving the first information sent by the centralized unit includes:

[0176] A handover report message sent by a centralized unit is received, where the handover report message carries the first information.

[0177] Optionally, when the other network node is another distributed unit, the sending the second information to the other network node includes:

[0178] The second information is sent to the other distributed units through the centralized unit.

[0179] The embodiment of the present application further provides an information transmission device, which is a centralized unit including a memory, a transceiver, and a processor:

[0180] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0181] When receiving the SON report information, sending first information to at least one distributed unit through the transceiver, where the first information is used to assist in performing MRO-related operations;

[0182] Among them, performing MRO-related operations includes any of the following:

[0183] The distributed unit directly performs the MRO operation of the distributed unit according to the first information;

[0184] If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit;

[0185] If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes;

[0186] The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0187] Optionally, the first information includes at least one of the following:

[0188] Failure type information;

[0189] Mobile information;

[0190] Time threshold information;

[0191] Self-organizing network SON report information;

[0192] Information of a first cell supporting communication of the terminal;

[0193] Information of a first primary and secondary cell supporting communication of the terminal;

[0194] Candidate cell information;

[0195] Information of candidate primary and secondary cells;

[0196] Switching reason value;

[0197] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0198] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0199] Optionally, the SON report information includes at least one of the following:

[0200] Layer 1 or Layer 2 measurement information;

[0201] Restore cell information;

[0202] Candidate cell information;

[0203] Information of candidate primary and secondary cells;

[0204] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0205] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0206] Optionally, the operation further includes:

[0207] The candidate cells or candidate primary and secondary cells selected by the centralized unit are updated.

[0208] Optionally, the operation further includes:

[0209] determining, based on the third information, a third network node on which an MRO operation needs to be performed;

[0210] Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit;

[0211] The third information includes at least one of RLF report information, information of a first cell supporting terminal communication or information of a first primary and secondary cell supporting terminal communication, and information of a second cell supporting terminal communication or information of a second primary and secondary cell supporting terminal communication.

[0212] Optionally, before determining, according to the third information, the third network node on which the MRO operation needs to be performed, the operation further includes:

[0213] According to the SCG failure information, information about a first cell supporting communication of the terminal or information about a first primary and secondary cell supporting communication of the terminal is determined.

[0214] Optionally, before determining, according to the third information, the third network node on which the MRO operation needs to be performed, the operation further includes:

[0215] receiving the second information sent by a first distributed unit among the at least one distributed unit according to the first information;

[0216] The first distributed unit is: a secondary node distributed unit SN-DU that provides services to the terminal before RLF, or a source SN-DU of the terminal.

[0217] Optionally, the second information includes at least one of the following:

[0218] Failure type information;

[0219] Mobile information;

[0220] Time threshold information;

[0221] SON report information;

[0222] Information of a first cell supporting communication of the terminal;

[0223] Information of a first primary and secondary cell supporting communication of the terminal;

[0224] Information of a second cell supporting communication of the terminal;

[0225] Information of a second primary and secondary cell supporting terminal communication;

[0226] Candidate cell information;

[0227] Information of candidate primary and secondary cells;

[0228] Switching reason value;

[0229] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0230] Optionally, updating the candidate cell or candidate primary and secondary cells selected by the centralized unit includes:

[0231] The candidate cell or candidate primary and secondary cells selected by the centralization unit is updated according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication.

[0232] Optionally, determining, according to the third information, a third network node on which an MRO operation needs to be performed includes:

[0233] In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes a source SN-DU of the terminal;

[0234] When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit;

[0235] When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

[0236] Optionally, determining, according to the third information, a third network node on which an MRO operation needs to be performed includes:

[0237] In the case that the connection failure is related to the current handover, or is related to the handover timing triggered by the source side, or is related to the handover failure, the third network node that needs to perform the MRO operation is determined according to the third information.

[0238] Optionally, the determining, according to the third information, a third network node on which an MRO operation needs to be performed further includes:

[0239] According to the time threshold information and the RLF report information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0240] Optionally, the sending the first information to at least one distributed unit includes:

[0241] A handover report message is sent to at least one distributed unit, where the handover report message carries the first information.

[0242] Optionally, the operation further includes:

[0243] In a case where the other network node is another distributed unit, the second information is sent to the other distributed unit.

[0244] The present application also provides an information transmission device, which is applied to a distributed unit and includes:

[0245] A receiving unit, configured to receive first information sent by a central unit, where the first information is used to assist in performing operations related to mobility robustness optimization (MRO);

[0246] Among them, performing MRO-related operations includes any of the following:

[0247] directly performing the MRO operation of the distributed unit according to the first information;

[0248] If it is determined after analyzing the first information that the distributed unit needs to perform an MRO operation, performing the MRO operation of the distributed unit;

[0249] If it is determined after analyzing the first information that other network nodes other than the distributed unit need to perform MRO operations, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0250] Optionally, the first information includes at least one of the following:

[0251] Failure type information;

[0252] Mobile information;

[0253] Time threshold information;

[0254] Self-organizing network SON report information;

[0255] Information of a first cell supporting communication of the terminal;

[0256] Information of a first primary and secondary cell supporting communication of the terminal;

[0257] Candidate cell information;

[0258] Information of candidate primary and secondary cells;

[0259] Switching reason value;

[0260] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0261] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0262] Optionally, the SON report information includes at least one of the following:

[0263] Layer 1 or Layer 2 measurement information;

[0264] Restore cell information;

[0265] Candidate cell information;

[0266] Information of candidate primary and secondary cells;

[0267] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0268] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0269] Optionally, analyzing the first information includes:

[0270] Determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal;

[0271] Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication;

[0272] The first network node includes: the distributed unit and / or the other network nodes.

[0273] Optionally, the determining, according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication, the first network node requiring MRO operation includes:

[0274] In a case where the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the first network node requiring the MRO operation includes a source SN-DU of the terminal;

[0275] In a case where the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit;

[0276] When the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, the first network node for performing the MRO operation is determined to include the target SN-DU of the terminal.

[0277] Optionally, the second information includes at least one of the following:

[0278] Failure type information;

[0279] Mobile information;

[0280] Time threshold information;

[0281] SON report information;

[0282] Information of a first cell supporting communication of the terminal;

[0283] Information of a first primary and secondary cell supporting communication of the terminal;

[0284] Information of a second cell supporting communication of the terminal;

[0285] Information of a second primary and secondary cell supporting terminal communication;

[0286] Candidate cell information;

[0287] Information of candidate primary and secondary cells;

[0288] Switching reason value;

[0289] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0290] Optionally, analyzing the first information includes:

[0291] In a case where the connection failure is related to the current handover or to the handover timing triggered by the source side or to the handover failure, determining, according to the RLF report information and / or mobility information in the first information, a second network node on which an MRO operation needs to be performed;

[0292] The second network node includes: the distributed unit and / or other distributed units.

[0293] Optionally, analyzing the first information further includes:

[0294] According to the time threshold information and RLF report information in the first information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0295] Optionally, the receiving the first information sent by the centralized unit includes:

[0296] A handover report message sent by a centralized unit is received, where the handover report message carries the first information.

[0297] Optionally, when the other network node is another distributed unit, the sending the second information to the other network node includes:

[0298] The second information is sent to the other distributed units through the centralized unit.

[0299] The present application also provides an information transmission device, which is applied to a centralized unit. The device includes:

[0300] A first sending unit is configured to send first information to at least one distributed unit when receiving SON report information, where the first information is used to assist in performing MRO-related operations;

[0301] Among them, performing MRO-related operations includes any of the following:

[0302] The distributed unit directly performs the MRO operation of the distributed unit according to the first information;

[0303] If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit;

[0304] If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes;

[0305] The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0306] Optionally, the first information includes at least one of the following:

[0307] Failure type information;

[0308] Mobile information;

[0309] Time threshold information;

[0310] Self-organizing network SON report information;

[0311] Information of a first cell supporting communication of the terminal;

[0312] Information of a first primary and secondary cell supporting communication of the terminal;

[0313] Candidate cell information;

[0314] Information of candidate primary and secondary cells;

[0315] Switching reason value;

[0316] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0317] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0318] Optionally, the SON report information includes at least one of the following:

[0319] Layer 1 or Layer 2 measurement information;

[0320] Restore cell information;

[0321] Candidate cell information;

[0322] Information of candidate primary and secondary cells;

[0323] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0324] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0325] Optionally, the device further includes:

[0326] The updating unit is configured to update the candidate cells or candidate primary and secondary cells selected by the centralization unit.

[0327] Optionally, the device further includes:

[0328] A first determining unit, configured to determine, based on the third information, a third network node on which an MRO operation needs to be performed;

[0329] Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit;

[0330] The third information includes at least one of RLF report information, information of a first cell supporting terminal communication or information of a first primary and secondary cell supporting terminal communication, and information of a second cell supporting terminal communication or information of a second primary and secondary cell supporting terminal communication.

[0331] Optionally, the device further includes:

[0332] The second determining unit is configured to determine information of the first cell supporting terminal communication or information of the first primary and secondary cells supporting terminal communication according to the SCG failure information before the first determining unit determines the third network node requiring MRO operation according to the third information.

[0333] Optionally, the device further includes:

[0334] a receiving unit, configured to receive, before the first determining unit determines, based on the third information, the third network node on which the MRO operation needs to be performed, the second information sent by the first distributed unit among the at least one distributed unit according to the first information;

[0335] The first distributed unit is: a secondary node distributed unit SN-DU that provides services to the terminal before RLF, or a source SN-DU of the terminal.

[0336] Optionally, the second information includes at least one of the following:

[0337] Failure type information;

[0338] Mobile information;

[0339] Time threshold information;

[0340] SON report information;

[0341] Information of a first cell supporting communication of the terminal;

[0342] Information of a first primary and secondary cell supporting communication of the terminal;

[0343] Information of a second cell supporting communication of the terminal;

[0344] Information of a second primary and secondary cell supporting terminal communication;

[0345] Candidate cell information;

[0346] Information of candidate primary and secondary cells;

[0347] Switching reason value;

[0348] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0349] Optionally, updating the candidate cell or candidate primary and secondary cells selected by the centralized unit includes:

[0350] The candidate cell or candidate primary and secondary cells selected by the centralization unit is updated according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication.

[0351] Optionally, determining, according to the third information, a third network node on which an MRO operation needs to be performed includes:

[0352] In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes a source SN-DU of the terminal;

[0353] When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit;

[0354] When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

[0355] Optionally, determining, according to the third information, a third network node on which an MRO operation needs to be performed includes:

[0356] In the case that the connection failure is related to the current handover, or is related to the handover timing triggered by the source side, or is related to the handover failure, the third network node that needs to perform the MRO operation is determined according to the third information.

[0357] Optionally, the determining, according to the third information, a third network node on which an MRO operation needs to be performed further includes:

[0358] According to the time threshold information and the RLF report information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0359] Optionally, the sending the first information to at least one distributed unit includes:

[0360] A handover report message is sent to at least one distributed unit, where the handover report message carries the first information.

[0361] Optionally, the device further includes:

[0362] The second sending unit is configured to send the second information to other distributed units when the other network nodes are other distributed units.

[0363] An embodiment of the present application further provides a non-transitory readable storage medium storing a computer program, wherein the computer program is used to enable a processor to execute the information transmission method applied to a distributed unit or a centralized unit as described above.

[0364] An embodiment of the present application further provides a computer program product, including computer instructions, which, when executed by a processor, implement the above-mentioned information transmission method applied to a distributed unit or a centralized unit.

[0365] The beneficial effects of the above technical solution of this application are as follows:

[0366] In the above scheme, the distributed unit receives first information sent by the centralized unit for assisting in performing MRO-related operations for mobile robustness optimization, wherein performing MRO-related operations includes any one of the following: the distributed unit directly performs the MRO operation of the distributed unit according to the first information; if the distributed unit determines that the distributed unit needs to perform the MRO operation after analyzing the first information, then performs the MRO operation of the distributed unit; if the distributed unit determines that other network nodes other than the distributed unit need to perform the MRO operation after analyzing the first information, then sends second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation; in this way, it supports the implementation of: the distributed unit directly performs the MRO operation based on the first information, or performs the MRO operation after analyzing the first information and determining that it needs to perform the MRO operation, or sends the second information to support the MRO operation after analyzing the first information and determining that other network nodes need to perform the MRO operation. In this way, network optimization in the DU-triggered switching scenario can be achieved, solving the problem that the existing network optimization solution is not applicable to the DU-triggered switching scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0367] Figure 1 A schematic diagram of the wireless communication system architecture according to an embodiment of the present application;

[0368] Figure 2 Schematic diagram of the process of performing layer 1 / layer 2 (layer 1 or layer 2) triggered switching (L1 / L2 triggered Mobility, LTM) within the DU according to an embodiment of the present application;

[0369] Figure 3 This is a schematic diagram of the handover report message transmission process according to an embodiment of the present application;

[0370] Figure 4 This is a schematic diagram of the information transmission method process of the embodiment of the present application Figure 1 ;

[0371] Figure 5 This is a schematic diagram of the information transmission method process of the embodiment of the present application Figure 2 ;

[0372] Figure 6 This is a schematic diagram of the information transmission device structure of the embodiment of the present application Figure 1 ;

[0373] Figure 7 This is a schematic diagram of the information transmission device structure of the embodiment of the present application Figure 2 ;

[0374] Figure 8 This is a schematic diagram of the structure of the information transmission device according to the embodiment of the present application. Figure 1 ;

[0375] Figure 9 This is a schematic diagram of the structure of the information transmission device according to the embodiment of the present application. Figure 2 . DETAILED DESCRIPTION

[0376] 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.

[0377] In the embodiments of this application, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can 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.

[0378] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0379] It is explained here that the technical solutions provided in the embodiments of the present application can be applicable to a variety of systems, especially 5G systems. For example, applicable systems can be global system of mobile communication (GSM) systems, code division multiple access (CDMA) systems, wideband code division multiple access (WCDMA) general packet radio service (GPRS) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, long term evolution advanced (LTE-A) systems, universal mobile telecommunication systems (UMTS), worldwide interoperability for microwave access (WiMAX) systems, 5G new air interface (NR) systems, etc. These various systems include terminal devices and network devices. The system can also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0380] Figure 1 A block diagram of a wireless communication system applicable to the embodiments of the present application is shown. The wireless communication system includes a terminal device (referred to as a terminal for short) and a network device.

[0381] The terminal device involved in the embodiments of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called User Equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, or a user device, but is not limited in the embodiments of the present application.

[0382] The network device involved in the embodiments of the present application may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface, or may be named otherwise. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (eNB or e-NodeB) in the Long Term Evolution (LTE) system, a 5G base station (the next Generation Node B, gNB) in the 5G network architecture, or a home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0383] Network devices and terminal devices can each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission. MIMO transmission can be either Single User MIMO (SU-MIMO) or Multi User MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or Massive-MIMO. It can also use diversity transmission, precoding, or beamforming.

[0384] The following first introduces the contents involved in the solution provided in the embodiment of the present application.

[0385] (1)LTM;

[0386] In traditional handover, the CU makes handover decisions based on the L3 (Layer 3) measurements reported by the UE, and triggers handover by sending a Radio Resource Control (RRC) message. LTM is also currently under discussion: the DU makes handover decisions based on the L1 / L2 measurements reported by the UE, and triggers handover via a Medium Access Control (MAC) Control Element (CE). The cell change mechanism triggered by L1 / L2 can achieve a faster handover process than that triggered by L3. To support mobility triggered by L1 / L2 measurements, the CU needs to request the configuration information of the candidate cell from the candidate DU in advance, and pre-configure this information to the UE in advance through an RRC message. The UE performs L1 / L2 measurements on the neighboring cells based on the received configuration, and reports it to the serving DU. The serving DU makes handover decisions based on the measurement report.

[0387] The LTM process executed within the DU (Intra-DU) can be as follows: Figure 2 As shown, the following steps are included:

[0388] 1. The CU sends a UE context modification request (requesting candidate cell configuration) to the serving DU; specifically, the CU requests the DU to pre-configure the underlying configuration information of the LTM candidate cell for the UE.

[0389] 2. The serving DU sends a UE context modification response (candidate cell configuration) to the CU; specifically, the DU generates a candidate cell underlying configuration and responds to the CU.

[0390] 3. The CU sends an RRC message to the UE. Specifically, the CU generates configuration information for the UE to switch to the candidate cell and sends the information to the UE via an RRC message, which carries the L1 measurement configuration information.

[0391] 4. The serving CU and the UE interact to complete beam measurement and reporting. Specifically, the UE performs L1 measurement based on the L1 measurement configuration information and reports the L1 measurement result to the DU.

[0392] 5. The serving DU sends an L1 / L2 message to the UE (serving cell change (handover) decision); specifically, the DU makes a cell change (handover) decision based on the L1 measurement result information reported by the UE. If the network decides that a cell change (handover) is required, the network sends a cell change (handover) command to the UE via the MAC CE.

[0393] 6. The UE sends an L1 / L2 message (serving cell change (handover) completed) to the serving DU; specifically, when the UE receives the cell change (handover) MAC CE, the UE will perform a cell change (handover) and access the target candidate cell.

[0394] 7. The serving DU sends an access notification (target cell identity) to the CU; specifically, after the DU sends a MACCE to the UE, the DU also sends an F1 interface message to the connected CU to inform the CU that the UE has executed LTM handover to another cell.

[0395] 1) The above process is applicable to both Master Cell Group (MCG) LTM and Secondary Cell Group (SCG) LTM. For MCG LTM, the serving DU is the Master Node (MN) serving DU, and the CU is the MN-CU. For SCG LTM, the serving DU is the Secondary Node (SN) serving DU, and the CU is the SN-CU.

[0396] 2) LTM also supports inter-DU. The basic process is similar. It only needs to change steps 1, 2, and 7 above to between the CU and the candidate DU, and step 6 to between the UE and the candidate DU.

[0397] (2) SON optimization;

[0398] In the event of a handover failure or RLF, the terminal will measure the configured frequency points and record the measurement results. The terminal will also record relevant information such as random access, handover, and re-establishment. After a handover failure, the terminal will select a cell and then re-access the network through RRC connection re-establishment or RRC connection establishment. The terminal will notify the network to retain information such as radio link failure or handover failure on the terminal side, which the network side will obtain from the terminal when necessary for network optimization on the network side. The network can optimize the configuration parameters of network devices during the handover process through SON-related reports reported by the UE (such as RLF report, Random Access Channel (RACH) report, Successful Handover Report (SHR)), which can improve network performance, increase handover success rate, and improve handover performance.

[0399] (3) Traditional Mobility Robust Optimization (MRO) inter-node message flow;

[0400] 1) Failure indication message:

[0401] After a network node receives an RRC connection re-establishment request message or obtains an RLF report from a UE, if the current node is not the node where the failure occurred, it needs to forward MRO related information to the failed network node across the network. The message involved is the following failure indication, and the main message content is as follows:

[0402] Table 1: Failure indication message content

[0403]

[0404] After receiving the UE's re-establishment request, the network sends a Failure Indication message using the RRC re-establishment branch. If RRC re-establishment is successful and a UE RLF report is obtained, the UE RLF report is also included in the Failure Indication message. If the UE successfully accesses the network through RRC establishment and generates a UE RLF report, the network obtains the RLF report and sends a Failure Indication message to the failed node through the RRC establishment branch.

[0405] 2) Handover report message:

[0406] After the network failure node analyzes the failure indication message, it may need to continue to send the handoverreport message for scenarios where other nodes need to be optimized. Figure 3 , for example:

[0407] 1. Handover is successful, including: UE successfully switches from NG-RAN1 to NG-RAN2.

[0408] 2-1. RLF occurs quickly. Specifically, after the UE successfully switches from NG-RAN1 to NG-RAN2, RLF occurs quickly in NG-RAN2.

[0409] 2-2. The UE records the RLF report information; specifically, when RLF occurs soon in NG-RAN2, the UE records the RLF report.

[0410] 3. Successful access; specifically, the UE successfully accesses NG-RAN3.

[0411] 4. Obtaining the RLF report; specifically, the UE interacts with NG-RAN3 to obtain the UE's RLF report.

[0412] 5. NG-RAN3 sends a failure indication to NG-RAN2. Specifically, if RLF occurs soon after a successful handover (the failed base station is NG-RAN2), a failure indication message is sent to NG-RAN2.

[0413] 6. NG-RAN2 sends a handover report to NG-RAN1. Specifically, NG-RAN2 finds after analysis that the RLF failure is caused by an unreasonable target cell selected by NG-RAN1 for handover. For a handover failure type of wrong cell, NG-RAN3 should be selected, and a handover report message is sent to NG-RAN1.

[0414] The content of the handover report message is as follows:

[0415] Table 2: Handover report message

[0416]

[0417]

[0418] 3) Threshold time (Tstore_UE_cntxt):

[0419] Whether the failure is related to the current handover is determined by T. Specifically, if the UE reports the time from when the handover connection failure occurred and the UE reporting time is shorter than the network-configured threshold T (Tstore_UE_cntxt), the failure is considered to be related to the handover. If the UE does not report the time or the reporting time is greater than the network-configured threshold and there has been no recent handover, the failure is considered to be related to the source side triggering the handover too late (which can be understood as being related to the source side not triggering the handover for too long).

[0420] Based on the above, embodiments of the present application provide information transmission methods, devices, and equipment to address the problem that existing network optimization methods do not support DU-triggered switching scenarios. The methods, devices, and equipment are based on the same application concept. Since the principles for solving the problems are similar, the implementation of the methods, devices, and equipment can refer to each other, and any repetitions will not be repeated.

[0421] The information transmission method provided in the embodiment of the present application is applied to distributed units, such as Figure 4 As shown, the method includes:

[0422] Step 401: Receive first information sent by a centralized unit, where the first information is used to assist in performing operations related to mobility robustness optimization (MRO).

[0423] Among them, performing MRO-related operations includes any of the following:

[0424] (1) The distributed unit directly performs the MRO operation of the distributed unit according to the first information; for example, if the first information includes failure type information, the DU directly performs the MRO operation;

[0425] (2) if the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, then executing the MRO operation of the distributed unit;

[0426] Wherein, “determining that the distributed unit needs to perform an MRO operation” may include: determining that the distributed unit is related to the connection failure; more specifically, it may include: determining that the connection failure is caused by the distributed unit;

[0427] In addition, a specific implementation of item (2) may include: if the first information does not include failure type information, obtaining second information based on the first information; if it is determined based on the second information that the distributed unit needs to perform an MRO operation, then the distributed unit performs the MRO operation; wherein "obtaining second information based on the first information" may include: obtaining the second information after analyzing the first information;

[0428] (3) If the distributed unit determines, after analyzing the first information, that other network nodes other than the distributed unit need to perform an MRO operation, sending second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation;

[0429] Wherein, “determining that other network nodes other than the distributed unit need to perform an MRO operation” may include: determining that other network nodes other than the distributed unit are related to the connection failure; more specifically, it may include: the connection failure is caused by the network nodes other than the distributed unit;

[0430] In addition, a specific implementation of item (3) may include: if the first information does not include failure type information, obtaining second information based on the first information; if it is determined based on the second information that other network nodes other than the distributed unit need to perform an MRO operation, sending the second information to the other network nodes. "Obtaining second information based on the first information" may include: obtaining the second information after analyzing the first information;

[0431] Among them, "determining that other network nodes other than the distributed unit need to perform an MRO operation" includes: case 1, determining that other network nodes other than the distributed unit need to perform an MRO operation, and determining the specific network node information of the other network nodes (such as a centralized unit or other distributed units); or case 2, determining that other network nodes other than the distributed unit need to perform an MRO operation, but not determining the specific network node information; for the above two cases, item (3) may specifically include the following two examples:

[0432] Example 1 for situation 1: According to the specific network node information, the second information is sent to the other network nodes; if the other network nodes are the centralized units, the second information is sent directly to the centralized units, and the centralized units perform their own MRO operations after receiving the information; if the other network nodes are other distributed units, the second information can be sent to the other distributed units through the centralized units; it can be understood as instructing the other distributed nodes to perform MRO operations through the centralized units.

[0433] Example 2 for situation 2: the second information is sent to the centralized unit in the other network nodes; the centralized unit determines the specific network node that needs to perform the MRO operation based on the second information; if the centralized unit determines that the specific network node that needs to perform the MRO operation is the centralized unit itself, the centralized unit performs its own MRO operation; if the centralized unit determines that the specific network node that needs to perform the MRO operation is other distributed units, the centralized unit instructs the other distributed units to perform the MRO operation based on the second information.

[0434] Simply put, the above three situations for MRO-related operations can be understood as:

[0435] When the first information includes failure type information, the distributed unit directly performs the MRO operation.

[0436] When the first information does not include the failure type information, the distributed unit analyzes the first information, and if it is determined that the connection failure is caused by the distributed unit itself, the distributed unit performs an MRO operation.

[0437] When the failure type information is not included in the first information, the distributed unit analyzes the first information. If it is determined that the connection failure is caused by a specific network node (such as a centralized unit or other distributed units), the distributed unit sends second information to the centralized unit, and the centralized unit performs an MRO operation according to the second information (the connection failure is caused by the centralized unit), or the centralized unit sends the second information to other distributed units (the other distributed units cause the connection failure), instructing the other distributed units to perform the MRO operation.

[0438] When the failure type information is not included in the first information, the distributed unit analyzes the first information. If it is determined that the connection failure is not caused by the distributed unit itself (the distributed unit has not analyzed the specific network node that caused the connection failure), the distributed unit sends second information to the centralized unit. The centralized unit analyzes the specific network node that caused the connection failure based on the second information. If it is analyzed that the network node that caused the connection failure is the centralized unit itself, the centralized unit performs the MRO operation. If it is analyzed that the network node that caused the connection failure is other distributed units, the centralized unit sends second information to the other distributed units that caused the connection failure, instructing the other distributed units that caused the connection failure to perform the MRO operation.

[0439] Here, it should be noted that the above MRO operation includes optimization (update) of handover parameters and / or selected third cells, wherein the third cell is a candidate cell or a candidate primary and secondary cell. The distributed unit can be a source DU or a target DU, which is not limited here.

[0440] In the information transmission method of an embodiment of the present application, a distributed unit receives first information sent by a centralized unit for assisting in performing MRO-related operations, wherein performing MRO-related operations includes any one of the following: the distributed unit directly performs the MRO operation of the distributed unit according to the first information; if the distributed unit determines that the distributed unit needs to perform the MRO operation after analyzing the first information, then performs the MRO operation of the distributed unit; if the distributed unit determines that other network nodes other than the distributed unit need to perform the MRO operation after analyzing the first information, then sends second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation; in this way, it supports the implementation of: the distributed unit directly performs the MRO operation based on the first information, or performs the MRO operation after analyzing the first information to determine that it needs to perform the MRO operation, or sends the second information to support the MRO operation after analyzing the first information to determine that other network nodes need to perform the MRO operation; in this way, network optimization in the DU triggered switching scenario can be achieved, solving the problem that the existing network optimization solution is not applicable to the DU triggered switching scenario.

[0441] Optionally, the first information includes at least one of the following:

[0442] Failure type information; for example, failure type information includes premature handover, late handover, or handover to an incorrect cell;

[0443] Mobility Information (mobility information); Here, the mobility information may be the mobility information of the terminal (UE) generated by the network side device;

[0444] Time threshold information; Here, the time threshold information is used to determine whether the failure is related to switching or whether it is related to the source side switching being too late;

[0445] Self-organizing network SON report information;

[0446] Information about a first cell supporting communication of the terminal; here, the first cell supporting communication of the terminal refers to a cell in which the terminal user can obtain normal communication services. For example, the first cell supporting communication of the terminal may be referred to as a suitable first cell, denoted as Suitable Cell;

[0447] Information about first primary and secondary cells supporting terminal communication; for example, the information about first primary and secondary cells supporting terminal communication may be a list of first primary and secondary cells supporting terminal communication, which may also be referred to as a suitable first primary and secondary cell list, expressed as: Suitable (Primary Secondary, PS) cell list;

[0448] Candidate cell information; for example, the candidate cell information may be a candidate cell list, expressed as: Candidate cell list;

[0449] Candidate primary and secondary cell information; for example, the candidate primary and secondary cell information may be a candidate primary and secondary cell list, expressed as: Cadidate (Primary Secondary, PS) cell list;

[0450] Switching reason value; for example, the switching reason value is LTM switching;

[0451] Reference information, the reference information including: at least one of source cell information, target cell information, recovery cell information, re-established cell information, and re-connected cell information.

[0452] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information. Here, it should be noted that the SON report information can be recorded by the UE and sent to the network device based on a request of the network device.

[0453] Optionally, the SON report information includes at least one of the following:

[0454] Layer 1 or Layer 2 measurement information;

[0455] Restore cell information;

[0456] Candidate cell information;

[0457] Information of candidate primary and secondary cells;

[0458] First indication information, the first indication information is used to indicate whether the cell to which the terminal successfully accesses belongs to a candidate cell or a candidate primary and secondary cell; that is, whether the cell to which the UE subsequently successfully switches belongs to the candidate cell or the candidate primary and secondary cell;

[0459] The second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching, that is, to indicate the execution of LTM.

[0460] As an optional implementation, analyzing the first information includes:

[0461] determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal; wherein the second cell supporting communication of the terminal may also be referred to as a suitable second cell, and the second primary and secondary cell supporting communication of the terminal may be referred to as a suitable second primary and secondary cell (suitable PS cell);

[0462] Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication;

[0463] The first network node includes: the distributed unit and / or the other network nodes.

[0464] Here, it should be noted that the first network node can be the target SN-DU, but the interaction with the target SN-DU needs to be transferred through the SN-CU, for example: the source SN-DU sends an F1 message (including suitable PScell and / or candidate PScell list) to the SN-CU, and the SN-CU then forwards it to the target SN-DU via the F1 message.

[0465] In the above optional implementation manner, by analyzing the first information, the network node that requires network optimization can be determined, so as to facilitate subsequent instructing the network node to perform the MRO operation.

[0466] As a specific implementation manner, determining the first network node that needs to perform the MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication includes:

[0467] When the second primary and secondary cell supporting communication of the terminal belongs to the candidate primary and secondary cell selected by the target secondary node SN, the first network node determined to perform the MRO operation includes the source SN-DU of the terminal; accordingly, the source SN-DU (which may be the current DU) automatically optimizes the handover-related parameters; here, the target SN may be the target SN-DU or the SN-CU, which is not limited here;

[0468] When the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit; in this case, F1 signaling may be sent to the centralized unit (e.g., SN-CU), where the F1 signaling includes information about the second primary and secondary cell supporting communication of the terminal and / or candidate primary and secondary cells (e.g., Candidate PScell list);

[0469] In the case where the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, it is determined that the first network node requiring MRO operation includes the target SN-DU of the terminal. In this case, first, this DU can send F1 signaling to the centralized unit (such as SN-CU) as the source SN-DU, wherein the F1 signaling includes the second primary and secondary cells supporting terminal communication (and / or candidate primary and secondary cell information (such as CandidatePScell list); secondly, the centralized unit (such as SN-CU) forwards the F1 signaling to the target SN-DU.

[0470] Here, it should be noted that the above-mentioned "determining the first network node that needs to perform the MRO operation" is explained using the second primary and secondary cell as an example, and can also be similarly applied to the second cell. The corresponding "candidate primary and secondary cell" is adjusted to the candidate cell (for example, when the second cell supporting terminal communication belongs to the candidate cell selected by the target secondary node SN, determining the first network node that needs to perform the MRO operation includes the source SN-DU of the terminal), and it will not be repeated here.

[0471] Optionally, the second information includes at least one of the following:

[0472] Failure type information;

[0473] Mobile information; here, the mobile information may be the mobile information of the terminal generated by the network side (network device);

[0474] Time threshold information;

[0475] SON report information; further, the SON report information may include RLF report information and / or SCG failure information; specifically, the SON report information includes at least one of the following: layer 1 or layer 2 measurement information; recovery cell information; candidate cell information; candidate primary and secondary cell information; first indication information, the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to the candidate cell or the candidate primary and secondary cell; second indication information, the second indication information is used to indicate the execution of layer 1 or layer 2 triggered handover;

[0476] Information of a first cell supporting communication of the terminal;

[0477] Information of a first primary and secondary cell supporting communication of the terminal;

[0478] Information of a second cell supporting communication of the terminal;

[0479] Information of a second primary and secondary cell supporting terminal communication;

[0480] Candidate cell information;

[0481] Information of candidate primary and secondary cells;

[0482] Switching reason value;

[0483] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0484] Here, it should be noted that the specific content of the information with the same name (such as failure type information) included in the first information and the second information may be the same or different, and is not limited here.

[0485] As an optional implementation, analyzing the first information includes:

[0486] In a case where the connection failure is related to the current handover or to the handover timing triggered by the source side or to the handover failure, determining, according to the RLF report information and / or mobility information in the first information, a second network node on which an MRO operation needs to be performed;

[0487] The second network node includes: the distributed unit and / or other distributed units.

[0488] Here, it should be noted that, in the above optional implementation, the second network node is a network node related to the cause of the current connection failure, that is, the network node that caused the current connection failure is determined by analyzing the RLF report information and / or mobility information in the first information.

[0489] Furthermore, based on the above optional implementation, analyzing the first information further includes:

[0490] According to the time threshold information and RLF report information in the first information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0491] It should be noted that a specific implementation example of the above steps may include: comparing the time information in the RLF report information with the time threshold; when the time information in the RLF report information is less than the time threshold, determining that the connection failure is related to the current handover; when the time information in the RLF report information is greater than the time threshold and there has been no handover in the recent period, or when the RLF report information does not contain time information, determining that the connection failure is related to the timing of handover triggered by the source side. The time information in the RLF report information is the time from when handover was executed to when the connection failed, or the time from when conditional handover (CHO) was executed to when the connection failed.

[0492] As an optional implementation, step 401, receiving first information sent by the centralized unit, includes:

[0493] A handover report message sent by a centralized unit is received, where the handover report message carries the first information.

[0494] Here, it should be noted that, as in this optional implementation, the first information can be carried by a switching report message. Of course, the first information can also be carried by other information, which is not limited here.

[0495] As an optional implementation manner, when the other network node is another distributed unit, the sending the second information to the other network node includes:

[0496] The second information is sent to the other distributed units through the centralized unit.

[0497] This enables information to be transferred and accurately transmitted to other distributed units.

[0498] The embodiment of the present application also provides an information transmission method, which is applied to a centralized unit, such as Figure 5 As shown, the method includes:

[0499] Step 501: Upon receiving SON report information, first information is sent to at least one distributed unit, where the first information is used to assist in performing MRO-related operations. This step may include: when a connection failure is related to at least one distributed unit, sending the first information to the at least one distributed unit. Specifically, the connection failure may include a connection failure on the target radio link after a successful handover, a handover failure, or an RLF on the source side caused by a handover being too late on the source side. In addition, the at least one distributed unit in this step may be determined based on the SON report information. For example, the at least one distributed unit may be at least one distributed unit associated with the RLF report in the SON report information.

[0500] Among them, performing MRO-related operations includes any of the following:

[0501] (1) The distributed unit directly performs the MRO operation of the distributed unit according to the first information; for example, if the first information includes failure type information, the DU directly performs the MRO operation;

[0502] (2) If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, then the MRO operation of the distributed unit is performed; specifically, in this case, the first information does not include connection failure type information, and the analysis of the first information determines that the connection failure is caused by the distributed unit itself;

[0503] (3) if the distributed unit determines, after analyzing the first information, that other network nodes other than the distributed unit need to perform an MRO operation, sending a second information to the other network nodes;

[0504] The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0505] In the information transmission method of an embodiment of the present application, upon receiving SON report information, a centralized unit sends first information to at least one distributed unit, the first information being used to assist in performing MRO-related operations. Performing MRO-related operations includes any of the following: the distributed unit directly performing an MRO operation on the distributed unit based on the first information; if the distributed unit determines, after analyzing the first information, that the distributed unit needs to perform an MRO operation, then performing the MRO operation on the distributed unit; if the distributed unit determines, after analyzing the first information, that other network nodes other than the distributed unit need to perform an MRO operation, then sending second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information being used to assist in performing the MRO operation. This supports the following implementations: the distributed unit directly performing an MRO operation based on the first information, performing an MRO operation after analyzing the first information and determining that the distributed unit needs to perform an MRO operation, or sending second information to support the MRO operation after analyzing the first information and determining that other network nodes need to perform an MRO operation. This enables network optimization in DU-triggered handover scenarios, resolving the problem that existing network optimization solutions are not applicable to DU-triggered handover scenarios.

[0506] Optionally, the first information includes at least one of the following:

[0507] Failure type information; for example, failure type information includes premature handover, late handover, or handover to an incorrect cell;

[0508] Mobility Information (mobility information); Here, the mobility information may be the mobility information of the terminal (UE) generated by the network side device;

[0509] Time threshold information; Here, the time threshold information is used to determine whether the failure is related to switching or whether it is related to the source side switching being too late;

[0510] Self-organizing network SON report information;

[0511] Information about a first cell supporting communication of the terminal; here, the first cell supporting communication of the terminal refers to a cell in which the terminal user can obtain normal communication services. For example, the first cell supporting communication of the terminal may also be referred to as a suitable first cell, and a suitable cell may be expressed as a Suitable Cell;

[0512] Information about a first primary and secondary cell supporting terminal communication; for example, the information about the first primary and secondary cell supporting terminal communication may be a list of suitable first primary and secondary cells, where a suitable primary and secondary cell is represented by: Suitable (Primary Secondary, PS) cell list;

[0513] Candidate cell information; for example, the candidate cell information may be a candidate cell list, expressed as: Candidate cell list;

[0514] Candidate primary and secondary cell information; for example, the candidate primary and secondary cell information may be a candidate primary and secondary cell list, expressed as: Cadidate (Primary Secondary, PS) cell list;

[0515] Switching reason value; for example, the switching reason value is LTM switching;

[0516] Reference information, the reference information including: at least one of source cell information, target cell information, recovery cell information, re-established cell information, and re-connected cell information.

[0517] Based on the above content, sending the first information to at least one distributed unit in step 501 may include:

[0518] Send at least one of the time threshold information, RLF report information and mobility information to the second distributed unit; wherein, the second distributed unit may be a distributed unit that provides services to the terminal before the RLF, which is not limited here.

[0519] Optionally, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information. Here, it should be noted that the SON report information can be recorded by the UE and sent to the network device based on a request of the network device.

[0520] Optionally, the SON report information includes at least one of the following:

[0521] Layer 1 or Layer 2 measurement information;

[0522] Restore cell information;

[0523] Candidate cell information;

[0524] Information of candidate primary and secondary cells;

[0525] First indication information, the first indication information is used to indicate whether the cell to which the terminal successfully accesses belongs to a candidate cell or a candidate primary and secondary cell; that is, whether the cell to which the UE subsequently successfully switches belongs to the candidate cell or the candidate primary and secondary cell;

[0526] The second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching, that is, to indicate the execution of LTM.

[0527] Furthermore, as an optional implementation, the method further includes:

[0528] The candidate cells or candidate primary and secondary cells selected by the centralized unit are updated.

[0529] Here, it should be noted that the above-mentioned optional implementation method specifically includes: when the centralized unit needs to perform an MRO operation, updating the candidate cell or the candidate primary and secondary cell selected by the centralized unit; wherein, "the situation where the centralized unit needs to perform an MRO operation" may include: the situation where the connection failure is related to the centralized unit; correspondingly, the above-mentioned method may include: when the connection failure is caused by the centralized unit, the centralized unit updates the candidate cell or the candidate primary and secondary cell selected by the centralized unit.

[0530] It should also be noted here that in the above-mentioned optional implementation method, the determination of whether the connection failure is related to the centralized unit (i.e. whether the connection failure is caused by the centralized unit) can be determined by the distributed unit, or by the centralized unit based on the second information sent by the distributed unit.

[0531] Furthermore, as an optional implementation, the method further includes:

[0532] determining, based on the third information, a third network node on which an MRO operation needs to be performed;

[0533] Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit;

[0534] The third information includes at least one of RLF report information, information about a first cell supporting communication with the terminal or information about a first primary and secondary cell supporting communication with the terminal, and information about a second cell supporting communication with the terminal or information about a second primary and secondary cell supporting communication with the terminal. This allows accurate determination of the network node requiring MRO.

[0535] As an optional implementation manner, updating the candidate cell or the candidate primary and secondary cells selected by the centralized unit includes:

[0536] The candidate cell or candidate primary and secondary cell selected by the centralized unit is updated based on the information of the second cell supporting terminal communication or the information of the second primary and secondary cell supporting terminal communication. That is, the CU updates the corresponding cell selected by the CU based on the information of the appropriate related cell fed back by the DU.

[0537] As a specific implementation manner, determining the third network node that needs to perform the MRO operation based on the third information includes:

[0538] In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes the source SN-DU of the terminal; correspondingly, the source SN-DU may optimize the handover-related parameters on its own;

[0539] When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit;

[0540] When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

[0541] Here, it should be noted that, based on the above specific implementation, the method further includes:

[0542] When it is determined that the third network node that needs to perform the MRO operation includes the source SN-DU of the terminal, sending SCG failure information to the source SN-DU to instruct the source SN-DU to perform the MRO operation;

[0543] In a case where it is determined that the third network node that needs to perform the MRO operation includes the centralized unit, the centralized unit performs the MRO operation (such as optimizing the candidate PScell list);

[0544] When it is determined that the third network node requiring MRO operation includes the target SN-DU of the terminal, the suitable PScell and / or the candidate primary and secondary cell identifiers selected by the target SN are sent to the target SN-DU to instruct the target SN-DU to perform the MRO operation.

[0545] The above steps can be implemented by sending the F1 instruction, but are not limited thereto.

[0546] As another specific implementation, determining the third network node that needs to perform the MRO operation according to the third information includes:

[0547] In the case that the connection failure is related to the current handover, or is related to the handover timing triggered by the source side, or is related to the handover failure, the third network node that needs to perform the MRO operation is determined according to the third information.

[0548] Here, it should be noted that, in the above optional implementation, the third network node is a network node related to the connection failure, that is, the network node causing the connection failure is determined by analyzing the third information.

[0549] Based on the above another specific implementation, the method further includes:

[0550] According to the time threshold information and the RLF report information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0551] Here, it should be noted that the relevant contents of the information transmission method applied to the distributed unit and the information transmission method applied to the centralized unit can refer to each other, and the repeated parts will not be repeated.

[0552] Furthermore, as an optional implementation, before determining the third network node on which the MRO operation is to be performed according to the third information, the method further includes:

[0553] According to the SCG failure information, the information of the first cell supporting the terminal communication or the information of the first primary and secondary cells supporting the terminal communication is determined. In this way, the above cell information can be accurately obtained.

[0554] Furthermore, as another optional implementation, before determining the third network node that needs to perform the MRO operation according to the third information, the method further includes:

[0555] receiving the second information sent by a first distributed unit among the at least one distributed unit according to the first information;

[0556] The first distributed unit is: a secondary node distributed unit SN-DU that provided services to the terminal before the RLF, or the source SN-DU of the terminal. Here, in the case of handover failure, the secondary node distributed unit SN-DU that provided services to the terminal before the RLF can be the source DU. In the case of handover failure soon after success, the secondary node distributed unit SN-DU that provided services to the terminal before the RLF can be the target DU.

[0557] Optionally, the second information includes at least one of the following:

[0558] Failure type information;

[0559] Mobile information; here, the mobile information may be the mobile information of the terminal generated by the network side (network device);

[0560] Time threshold information;

[0561] SON report information; further, the SON report information may include RLF report information and / or SCG failure information; specifically, the SON report information includes at least one of the following: layer 1 or layer 2 measurement information; recovery cell information; candidate cell information; candidate primary and secondary cell information; first indication information, the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to the candidate cell or the candidate primary and secondary cell; second indication information, the second indication information is used to indicate the execution of layer 1 or layer 2 triggered handover;

[0562] Information of a first cell supporting communication of the terminal;

[0563] Information of a first primary and secondary cell supporting communication of the terminal;

[0564] Information of a second cell supporting communication of the terminal;

[0565] Information of a second primary and secondary cell supporting terminal communication;

[0566] Candidate cell information;

[0567] Information of candidate primary and secondary cells;

[0568] Switching reason value;

[0569] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0570] Here, it should be noted that the specific content of the information with the same name (such as failure type information) included in the first information and the second information may be the same or different, and is not limited here.

[0571] As an optional implementation, in step 501, sending first information to at least one distributed unit includes:

[0572] A handover report message is sent to at least one distributed unit, where the handover report message carries the first information.

[0573] Here, it should be noted that, as in the above optional implementation, the first information can be carried by a switching report message. Of course, the first information can also be carried by other information, which is not limited here.

[0574] Furthermore, as an optional implementation, the method further includes:

[0575] In the case where the other network node is another distributed unit, the second information is sent to the other distributed unit. For example, the other distributed unit here is a target SN-DU of the terminal.

[0576] It is noted here that the relevant contents of the above-mentioned methods can be referenced to each other, and the repeated contents will not be repeated.

[0577] The following is an example of the information transmission method in the embodiment of the present application.

[0578] To address the above technical issues, an embodiment of the present application provides an information transmission method, which can be specifically implemented as a network optimization method under CU / DU (i.e., centralized unit (CU) and distributed unit (DU)) separation. The following describes the following scenarios separately:

[0579] Scenario 1: MCG-based LTM (LTM applicable to MCG);

[0580] Example 1:

[0581] The CU determines whether the radio link failure is related to the current handover (for example, the handover succeeded but failed quickly), or whether the handover on the source side was too late (for example, the handover failed on the source side). If the CU believes that it is related to the current handover or the handover on the source side is too late, it analyzes the RLF report (reported by the UE upon request) and sends one or more of the analyzed failure type, cell information (corresponding to the above reference information), handover cause value, etc. to the DU (for example, the source DU or the target DU). The optional information sent may also include mobility information, RLF report, and candidate cell list; based on this, the DU is used to optimize the handover-related configuration. If it is determined that other DUs (corresponding to the target DU or the source DU) other than the aforementioned DU also need to be optimized (for example, optimizing the selection of the candidate cell list), a suitable cell list and / or candidate cell list is sent to the other DU.

[0582] This example may correspond to the above-mentioned centralized unit determining, according to the third information, a third network node on which an MRO operation needs to be performed when the connection failure is related to the current switching, or is related to the switching timing triggered by the source side, or is related to the switching failure; wherein the third network node includes: the at least one distributed unit; the third information includes: RLF report information; sending first information to the at least one distributed unit, the first information being used to assist in performing MRO-related operations; wherein performing MRO-related operations includes: the distributed unit directly performing the MRO operation of the distributed unit according to the first information.

[0583] Example 2: The DU obtains the time threshold T (corresponding to the aforementioned time threshold information), which can be obtained through Operation Administration and Maintenance (OAM), or sent by the CU to the DU (for example, the last serving DU) through F1 signaling. The CU sends the RLF report and / or mobility information to the DU. The DU determines whether the radio link failure is related to the current handover or whether the source side handover is too late based on the threshold T. If the DU believes that it is related to the current handover, the DU analyzes the RLF report and optimizes the handover-related configuration. If it is considered to be a problem with other DUs, one or more of the failure type, cell information, handover reason value, etc. analyzed by the DU on the RLF report needs to be sent. The optional information sent also includes mobility information, RLF report, and candidate cell list (these contents correspond to the second information mentioned above); based on this, it is sent to the DU that needs to be optimized, and can be specifically forwarded and sent through the CU.

[0584] This example may correspond to the above-mentioned centralized unit sending first information to at least one distributed unit, where the first information is used to assist in performing MRO-related operations; wherein performing MRO-related operations includes any one of the following: (1) if the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, then executing the MRO operation of the distributed unit; (2) if the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, then sending second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation.

[0585] Scenario 2: SCG-based LTM (LTM applicable to SCG);

[0586] Example three: After the MN-CU forwards the SCG failure information to the SN-CU, the SN-CU sends the SCG failure information to the last serving SN-DU (which may be the source DU in the case of a handover failure; or the target DU in the case of a handover failure soon after success) or the source SN-DU; the information sent may also include mobility information. The last serving or source SN-DU is analyzed to obtain a suitable Pscell (corresponding to the aforementioned determination of the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication based on the SCG failure information in the first information). Optionally, the suitable PScell is sent to the SN-CU (corresponding to the aforementioned sending of the second information to the other network nodes; applicable to situations where SN-CU optimization is required, SN-CU forwarding is required to optimize other DUs, and SN-CU analysis is required to perform operations on the network node that caused the connection failure. If the suitable PScell is in the candidate PScell list selected by the target SN, the source SN-DU automatically optimizes the switching related parameters (corresponding to the aforementioned case where the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells selected by the target secondary node SN, and the first network node that needs to perform the MRO operation is determined to include the source SN-DU of the terminal); if the suitable PScell is not in the candidate PScell list configured by the SN-CU, the SN-CU performs optimization (corresponding to the aforementioned case where the second primary and secondary cells supporting terminal communication do not belong to the candidate primary and secondary cells configured by the centralized unit, and the first network node that needs to perform the MRO operation is determined to include the centralized unit). If the suitable PScell is in the candidate PScell list configured by the SN-CU but not in the candidate PScell list selected by the target SN, the SN-CU will send the suitable PScell to the target SN (corresponding to the aforementioned situation where the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, and the first network node that needs to perform the MRO operation includes the target SN-DU of the terminal), and the target SN-DU is optimized; in this case, information forwarding can be performed through the CU (corresponding to the aforementioned sending of the second information to the other distributed units through the centralized unit).Among them, the source SN-DU sends the suitable PScell to the SN-CU, which may correspond to the above-mentioned centralized unit receiving the second information sent by the first distributed unit in the at least one distributed unit according to the first information; updating the candidate cell or candidate primary and secondary cell selected by the centralized unit; or, based on the third information, determining the third network node that needs to perform the MRO operation; wherein, the third network node includes: the at least one distributed unit and / or the centralized unit; the third information includes: information of the second primary and secondary cell supporting terminal communication.

[0587] Example 4: After the MN-CU forwards the SCG failure information to the SN-CU, the SN-CU analyzes and obtains a suitable PScell (corresponding to the centralized unit determining, based on the SCG failure information, the information of the first primary and secondary cells supporting terminal communication; and determining, based on the third information, the third network node on which the MRO operation needs to be performed; wherein the third network node includes: the at least one distributed unit and / or the centralized unit; and the third information includes: information of the first primary and secondary cells supporting terminal communication). If the suitable PScell is in the candidate PScell list selected by the target SN, the SCG failure information is sent to the source SN-DU (corresponding to the above-mentioned determination that the third network node requiring the MRO operation includes the source SN-DU of the terminal when the first primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells selected by the target secondary node SN), and the source SN-DU automatically optimizes the handover-related parameters (corresponding to the distributed unit directly performing the MRO operation of the distributed unit based on the first information). If the suitable PScell is not in the candidate PScell list configured by the SN-CU, list, the SN-CU optimizes itself (corresponding to the above-mentioned case where the first primary and secondary cell supporting terminal communication does not belong to the candidate primary and secondary cell configured by the centralized unit, determining that the third network node that needs to perform the MRO operation includes the centralized unit; the centralized unit updates the candidate cell or candidate primary and secondary cell selected by the centralized unit). If the suitable PScell is in the candidate PScell list configured by the SN-CU, but not in the candidate PScell list selected by the target SN, the SN-CU sends the suitable PScell to the target SN, and the target SN-DU is optimized (corresponding to the above-mentioned case where the first primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cell configured by the centralized unit but does not belong to the candidate primary and secondary cell selected by the target SN, determining that the third network node that needs to perform the MRO operation includes the target SN-DU of the terminal). It should be noted that the difference between Example 3 and Example 4 is that the SCG failure information is analyzed for the last serving SN-DU (Example 3) or SN-CU (Example 4).

[0588] It should be noted here that in the above example, the CU example is SN-CU, but the CU that executes the information transmission method of the embodiment of the present application can also be MN-CU, and the relevant operations are performed by MN-CU, which is not limited here.

[0589] In addition, it should be noted that for SCG LTM (Example 3 and Example 4 above), the three options mentioned above (suitable PScell is in the candidate PScell list selected by the target DU, in the candidate PScell list configured by the CU but not in the candidate PScell list selected by the target DU, and not in the candidate PScell list selected by the CU) can also be simplified into two cases: suitable PScell is in the candidate PScelllist selected by the CU and not in the candidate PScell list selected by the CU. This does not involve signaling interaction between the source SN-DU or CU and the target SN-DU, which is similar to the above scheme. Please refer to the above related content for details and will not be repeated here.

[0590] Specifically, this plan involves the following contents:

[0591] 1. The CU sends F1 signaling to the DU, which contains the first information. The first information is used by the DU to optimize the handover-related parameters and / or candidate (PS) cell list selection, and can also be used to assist the DU in analyzing network nodes related to connection failures. The CU can be an MN-CU or SN-CU in a dual connectivity (DC) scenario, or a CU in a non-DC scenario. The same applies to the DU and will not be repeated here.

[0592] 2. The first information may include one or more of the following:

[0593] a) Failure type information, including premature handover, late handover, and handover to the wrong cell;

[0594] b) mobile information;

[0595] c) a time threshold T (corresponding to the above-mentioned time threshold information), which can be used to determine whether the (connection) failure is related to handover or to a late handover on the source side;

[0596] d) SON report information;

[0597] e) Suitable (PS) cell (corresponding to the information of the first cell supporting terminal communication and / or the information of the first primary and secondary cell supporting terminal communication);

[0598] f) Candidate (PS) cell list (corresponding to the above-mentioned candidate cell information and / or candidate primary and secondary cell information);

[0599] g) Handover cause value (e.g., LTM handover);

[0600] h) Cell information (corresponding to the above-mentioned reference information), including one or more of the following: source cell information, target cell information, recovery cell information, re-established cell information, and reconnected cell information.

[0601] 3. Based on 2, the SON report may be an RLF report or SCG failure information (corresponding to the above SON report information including: radio link failure RLF report information and / or secondary cell group SCG failure information). The report may be recorded by the UE and sent to the network based on a network request.

[0602] 4. Based on 3, the terminal records one or more of the following in the SON report:

[0603] L1 / L2 measurement information, recovery cell information, candidate (PS) cell list (corresponding to the above-mentioned candidate cells and / or candidate primary and secondary cells), indication information (corresponding to the above-mentioned first indication information) indicating whether a cell in the candidate (PS) cell list is selected (that is, whether the cell that was later successfully switched belongs to this table), and execution LTM indication information (corresponding to the above-mentioned second indication information).

[0604] 5. Based on step 1, the CU sends F1 interface signaling to the DU, which can be the current access and mobility indication (Access and Mobility Indication) or a new F1 signaling.

[0605] 6. Based on 2, the CU analyzes the SON report and sends the first information to the DU, which optimizes the handover parameters.

[0606] 7. Based on 6, after receiving the SON report, the CU analyzes the SON report, optimizes the candidate cell list, and / or sends an F1 message (including f) and / or e)) to other nodes that need to be optimized (target DU).

[0607] 8. Based on 2, the CU sends c) and / or d) to the target DU, optionally including b), or the target DU obtains c) through OAM. The DU determines whether the failure is related to the handover based on the above information, and performs SON report analysis if so. This may correspond to a case where the connection failure is related to the current handover, or is related to the timing of the handover triggered by the source side, or is related to the handover failure, and the distributed unit determines, based on the first information, the second network node on which the MRO operation needs to be performed.

[0608] 9. Based on step 2, after receiving the SON report, the CU analyzes the SON report and optimizes the candidate cell list; corresponding to the above-mentioned determination of a third network node requiring MRO based on the third information; the third network node includes: the centralized unit; updating the candidate cells or candidate primary and secondary cells selected by the centralized unit; or, the CU sends the SON report to the DU; if the DU determines that the CU requires optimization, at least e) is sent back to the CU for optimization; corresponding to the above-mentioned distributed unit receiving the first information sent by the centralized unit, the first information is used to assist in performing MRO-related operations; wherein performing MRO-related operations includes: if the distributed unit determines, after analyzing the first information, that other network nodes other than the distributed unit require MRO, sending second information to the other network nodes. Specifically, for inter-DU LTM scenarios, in the case of handover failure, the DU may be the source DU; in the case of handover success followed by subsequent failure, the DU may be the target DU. For intra-DU LTM scenarios, the DU may be the serving DU; this is not limited herein.

[0609] 10. Based on 8, after the target DU analyzes the SON report, if it believes that the source DU also needs to be optimized, the target DU sends the first information (specifically, it can be information obtained based on the first information, which can be called updated first information and can correspond to the above-mentioned second information) to the node that needs to be optimized through the CU.

[0610] 11. Based on 2, the SN-CU sends F1 signaling to the last serving SN-DU and / or the source SN-DU. The information sent may include d) and, optionally, b).

[0611] 12. Based on 11, the last serving SN-DU may receive d) and perform analysis to obtain e). Optionally, the first information (specifically, the updated first information) may be sent to the SN-CU.

[0612] 13. Based on step 11, the source SN-DU may receive d) and analyze it to obtain e). Optionally, e) may be sent to the CU.

[0613] 14. Optionally, based on 12, the SN-CU sends the first information to the source SN-DU, allowing the source SN-DU to perform optimization;

[0614] 15. Optionally, based on 13, the SN-CU sends e) and / or f) to the target SN-DU, allowing the target SN-DU to perform optimization.

[0615] 16. Based on 2, the SN-CU analyzes the SON report and obtains e); corresponding to the aforementioned determination of information of the first cell supporting terminal communication or information of the first primary and secondary cells supporting terminal communication based on the SCG failure information.

[0616] 17. Optionally, based on step 16, the SN-CU sends d) to the source SN-DU, and the source SN-DU optimizes the handover parameters. Optionally, steps a) and / or b) and / or e) and / or g) and / or h) may correspond to the aforementioned step of sending first information to at least one distributed unit; the distributed unit directly performs the MRO operation of the distributed unit based on the first information.

[0617] 18. Optionally, based on 16, the SN-CU sends e) and / or f) to the target SN-DU to allow the target SN-DU to be optimized, and optionally also includes d); it may also correspond to the aforementioned sending of first information to at least one distributed unit; the distributed unit directly performs the MRO operation of the distributed unit based on the first information.

[0618] The following is a specific example to illustrate this solution.

[0619] Example 1: For MCG-based LTM and / or LTM failure scenarios in non-DC scenarios (corresponding to Example 1 above), this solution may include the following steps:

[0620] 1) The CU generates the time threshold T or obtains the time threshold T from OAM.

[0621] 2) The CU requests the DU to generate the underlying configuration of the candidate cell. Here, for intra-DU LTM, the DU is the serving DU; for inter-DU LTM, the DU is the candidate DU.

[0622] 3) The DU responds to the CU with the UE's candidate cell underlying configuration. Optionally, the DU sends mobility information to the CU, where the mobility information can be handover-related information encoded by the DU, such as the UE type. The CU stores this mobility information. Alternatively, the mobility information sent by the DU to the CU can be any F1 message during the LTM handover process, such as a request from the CU for L1 / L2 measurement reporting resources from the serving DU. The serving DU then sends the mobility information in its response to the L1 / L2 measurement reporting resources.

[0623] 4) The DU sends a MAC CE to trigger handover based on the L1 / L2 measurement report. If the UE fails soon after a successful handover or the radio link on the source side fails, the UE recovers to the LTM candidate cell or re-establishes RRC or reconnects to another cell.

[0624] 5) The UE generates an RLF report and records handover-related information. This report may include at least one of the following information: the time of handover failure, the time of the last handover connection failure, L1 and / or L2 and / or L3 measurement information, recovery cell information, candidate cell list, an indication of whether a cell in the candidate cell list is selected as the recovery cell, information about the cell being reconnected or reestablished by the UE, and LTM indication information.

[0625] 6) The UE sends an RLF report according to the network instruction. The CU compares the time reported by the UE with the time threshold T to determine whether the connection failure is related to the current handover or to the source side's late handover.

[0626] 7) If the CU believes that the radio link failure is related to this handover, or is related to the source side handover being too late, the CU will analyze whether the settings of the candidate cell list selection are reasonable (for example, whether a suitable cell is included in the candidate cell list). Specifically, if the CU believes that the settings of the candidate cell list selection are reasonable, the following steps will be executed; if the CU believes that the settings of the candidate cell list selection are unreasonable, the CU will optimize the selection of the candidate cell list (that is, optimize the selected cell) and / or send the candidate cell list to the target DU; thereafter, the CU may optionally execute the following steps.

[0627] 8) If the failure is a handover failure, the CU directly sends an RLF report to the source DU (for intra-DU LTM, this DU can be a serving DU. Both the source DU and the target DU are serving DUs; that is, in this case there is only one DU, and the handover may be between two cells under one DU). If the failure is a radio link failure soon after a successful handover, the CU analyzes the failure type, which can be too early handover, too late handover, or handover to the wrong cell (too early handover / too late handover / to wrong cell handover), and notifies the target DU (for intra-DU LTM, the serving DU) of the failure type via F1 interface signaling.

[0628] The F1 interface signaling may also carry one or more of the following: a handover cause value (e.g., LTM handover), a candidate cell list, a source side cell identifier, a target side cell identifier, a reestablished or reconnected cell identifier, a recovered cell identifier, and an RLF report. Specifically, the cell identifier may be represented as: a global cell identifier (Cell Global Identifier, CGI), a globally unique NG-RAN identifier (Global (NG-RAN) Cell Identity), and / or a physical cell identifier (Physical Cell ID, PCI). If step 3) is performed, the F1 interface signaling may also include the DU-coded mobility information stored by the CU.

[0629] 9) After receiving the F1 interface signaling, the source DU (for intra-DU LTM, the source DU is the serving DU) optimizes the handover parameters based on the information carried in the signaling. In step 7), the target DU has already updated its cell list. Specifically, the source DU updates the handover parameters, the target DU updates its selected cell list, and the CU also updates its selected cell list.

[0630] Example 2: MCG-based LTM and / or LTM failure scenario in non-DC scenario (corresponding to the above example 2), including the following steps:

[0631] 1) The CU generates the time threshold T or obtains it from OAM and sends it to the DU (for intra-DU LTM, the serving DU; for inter-DU LTM, the candidate DU) via F1 signaling. Specifically, the CU can send this threshold T to the DU when requesting the DU to generate the underlying configuration for the candidate cell, or before handover. Alternatively, the DU (for intra-DU LTM, the serving DU; for inter-DU LTM, the candidate DU) directly obtains the time threshold T from OAM.

[0632] 2) The DU (for intra-DU LTM, the serving DU; for inter-DU LTM, the candidate DU) responds to the CU with the UE's candidate cell low-level configuration. Optionally, the DU sends mobility information to the CU in this step. Mobility information is handover-related information encoded by the DU, such as the UE type. The CU stores this mobility information. Optionally, the mobility information sent by the DU to the CU can also be any F1 message during the LTM handover process.

[0633] 3) The DU sends a MAC CE to trigger handover based on the L1 / L2 measurement report. If the handover fails soon after success or the radio link fails on the source side, the UE recovers to the LTM candidate cell, or the RRC is re-established or reconnected to another cell.

[0634] 4) The UE generates an RLF report and records handover-related information, including at least one of the following: the time of handover failure, the time of the last handover connection failure, L1 and / or L2 and / or L3 measurement information, recovery cell information, candidate cell list, an indication of whether a cell in the candidate cell list is selected as the recovery cell, information about the cell to be reconnected or reestablished by the UE, and LTM indication information.

[0635] 5) The UE reports an RLF report according to the network instruction.

[0636] In the case of a handover failure (HOF) scenario, the CU receives the RLF report and sends it to the source DU (for intra-DU LTM, the serving DU) via an F1 message. The DU then analyzes the RLF report. Optionally, the F1 message also carries the mobility information stored by the CU.

[0637] For the RLF scenario that occurs soon after a successful handover: the CU receives the RLF report and sends it to the target DU (for intra-DU LTM, the serving DU) for analysis.

[0638] Optionally, after receiving the RLF report, the CU analyzes the candidate cell list in the RLF report. If the CU determines that the candidate cell list selection is problematic, it optimizes the candidate cell list selection. (This step is similar to the step 6 where the DU receives the RLF report, analyzes it, and determines that the CU needs to optimize the candidate cell list.) The DU then sends the relevant information to the CU, allowing the CU to optimize the two different solutions.

[0639] In addition, if the CU currently receiving the RLF report has no direct interface with the DU where the source or target cell related to the RLF report is located, the CU needs to first send the RLF report to the CU with an F1 interface with the DU where the source or target cell is located, and the CU then forwards it to the DU where the source or target cell is located.

[0640] 6) The source DU or target DU or serving DU compares the time reported by the UE in the RLF report with the time threshold T to determine whether the connection failure is related to the current handover or to a late handover on the source side.

[0641] If the DU believes that the RLF is related to this handover, or is related to the source side handover being too late. The DU analyzes the RLF report. If it is HOF: the source DU (for intra-DU LTM, it is the serving DU) performs handover-related optimization. If the handover succeeds and fails quickly (RLF case): the target DU (for intra-DU LTM, it is the serving DU) analyzes the RLF report and forwards the analysis result of the RLF report to the DU that needs to be optimized, such as the source DU, through the CU. That is, the target DU will send F1 message 1 to the CU, and the CU will send F1 message 2 to the source DU. F1 message 1 and F1 message 2 include one or more of the following: failure type (which can be too early handover / too late handover / to wrong cell handover), handover reason value (for example, LTM handover), candidate cell list, source side cell identifier, target side cell identifier, reestablished or reconnected cell identifier, and restored cell identifier. Optionally, F1 message 2 can also include DU-coded mobility information saved by the CU. Optional F1 message 1 and F1 message 2 also contain an RLF report.

[0642] Optionally, if the source DU, target DU, or serving DU finds that the candidate cell list selection is inappropriate, the DU sends at least the suitable cell to the CU, allowing the CU to optimize the candidate cell list. (This step differs from the CU's direct optimization of the candidate cell list upon receiving the RLF report in step 5.)

[0643] Example 3: SCG based LTM (corresponding to the aforementioned Example 3), including the following steps:

[0644] 1) SN-CU requests candidate PScell underlying configuration from SN-DU.

[0645] 2) The SN-DU replies to the SN-CU with the candidate PScell underlying configuration of the UE. Optionally, the SN-DU sends mobility information to the SN-CU. The mobility information is handover-related information encoded by the SN-DU, such as the UE type; the SN-CU stores the mobility information. The mobility information sent by the SN-DU to the SN-CU can also be carried in any F1 message during the LTM handover process. The SN-CU can also choose to send the mobility information to the MN-CU, which will store it.

[0646] 3) The SN-DU sends a MAC CE to trigger handover based on the L1 / L2 measurement report. If the handover fails soon after success or the radio link fails on the source side, the UE recovers to the LTM candidate cell or the RRC is re-established or reconnected to another cell.

[0647] 4) The UE generates SCG failure information, records PScell handover related information, and reports the SCG failure information to the MN. The SCG failure information includes at least one of the following: the time of the handover failure, the time of the last handover connection failure, L1 and / or L2 and / or L3 measurement information, recovery PScell information, candidate PScell list, UE reconnection or reestablishment cell information, and LTM triggering handover indication information.

[0648] 5) After receiving the SCG failure information, the MN-CU forwards it to the SN-CU via the Xn or X2 interface. Optionally, the SCG failure information carries the mobility information stored by the MN-CU. After receiving the SCG failure information, the SN-CU sends it to the last serving SN-DU or the source SN-DU via the F1 interface for analysis. Optionally, it carries the mobility information stored by the MN-CU or SN-CU.

[0649] 6) Including the following two situations:

[0650] A) When the last serving SN-DU is the target SN-DU (RLF scenario), the target SN-DU analyzes the suitable PScell after receiving the SCG failure information.

[0651] If the suitable PScell is in the candidate PScell list configured by the SN-CU but not in the candidate PScell list selected by the target SN, the target SN-DU optimizes itself.

[0652] If the suitable PScell is in the candidate PScell list selected by the target SN and in the candidate PScell list selected by the SN-CU, the SN-DU sends one or more of the suitable PScell, failure type, handover cause value, and cell information to the source SN-DU, and the source SN-DU performs optimization.

[0653] If the target SN-DU determines that the suitable PScell is not in the candidate PScell list configured by the SN-CU, it sends the suitable PScell to the SN-CU, and the SN-CU optimizes it on its own. Alternatively, the target SN-DU directly sends one or more of the suitable PScell, failure type, switching reason value, and cell information to the SN-CU, and the SN-CU decides whether to optimize it on its own.

[0654] B) When the last serving SN-DU is the source SN-DU, or the SN-CU directly sends the SCG failure information to the source SN-DU. The source SN-DU analyzes the suitable PScell. If the suitable PScell is in the candidate PScell list selected by the target SN, the SN-DU optimizes itself. Otherwise, the suitable PScell is sent to the SN-CU. The SN-CU makes a judgment. If the suitable PScell is not in the candidate PScell list configured by the SN-CU, the source SN-CU optimizes itself. If the suitable PScell is in the candidate PScell list configured by the SN-CU but not in the candidate PScell list selected by the target SN, the SN-CU sends the suitable PScell (optionally including at least one of the candidate PScell list, SCG failure information, etc.) to the target SN-DU via F1 interface signaling. The target SN-DU can optimize the selection of the candidate PScell list.

[0655] Example 4: SCG based LTM (corresponding to Example 4), including the following steps:

[0656] 1) SN-CU requests candidate PScell underlying configuration from SN-DU.

[0657] 2) The SN-DU replies to the SN-CU with the candidate PScell underlying configuration of the UE. Optionally, the SN-DU sends mobility information to the SN-CU. The mobility information is handover-related information encoded by the SN-DU, such as the UE type; the SN-CU stores the mobility information. The mobility information sent by the SN-DU to the SN-CU can also be carried in any F1 message during the LTM handover process. The SN-CU can also choose to send the mobility information to the MN-CU, which will store it.

[0658] 3) The SN-DU sends a MAC CE to trigger handover based on the L1 / L2 measurement report. If the handover fails soon after success or the radio link fails on the source side, the UE recovers to the LTM candidate cell or the RRC is re-established or reconnected to another cell.

[0659] 4) The UE generates SCG failure information, records PScell handover related information, and reports the SCG failure information to the MN. The SCG failure information includes at least one of the following: the time of the handover failure, the time of the last handover connection failure, L1 and / or L2 and / or L3 measurement information, recovery PScell information, candidate PScell list, UE reconnection or reestablishment cell information, and LTM triggering handover indication information.

[0660] 5) After receiving the SCG failure information, the MN-CU forwards it to the SN-CU via the Xn or X2 interface. Optionally, the SCG failure information carries the mobility information stored by the MN-CU.

[0661] After receiving the SCG failure information, the SN-CU analyzes the suitable Pscell:

[0662] If the suitable PScell is in the candidate PScell list configured by the SN-CU, the SCG failure information is sent to the source SN-DU to allow the SN-DU to optimize the handover parameters. It can also carry one or more of the suitable PScell, mobility information, failure type, handover cause value, and cell information to the source SN-DU.

[0663] If the suitable PScell is not in the candidate PScell list configured by the SN-CU, the SN-CU optimizes itself, for example, by subsequently including the suitable PScell in the candidate PScell list.

[0664] If the suitable PScell is in the candidate PScell list configured by the SN-CU but is not in the candidate PScell list selected by the target SN, the SN-CU sends the suitable PScell, optionally including the candidate PScelllist, and SCG failure information to the target SN-DU via F1 interface signaling. The target SN-DU can optimize the selection of the candidate PScell list.

[0665] It is to be noted that the relevant contents of the above embodiments can be referred to each other, and the repeated parts will not be repeated here.

[0666] As described above, the embodiments of the present application propose a method for network optimization during DU-triggered handover in CU / DU separation. This method provides a solution for determining analysis nodes and optimization nodes in LTM scenarios, as well as for transmitting signaling content between nodes. This method implements network optimization during DU-triggered handover, resolving the issue that existing network optimization solutions are unsuitable for DU-triggered handover scenarios.

[0667] The embodiment of the present application further provides an information transmission device, which is a distributed unit. Figure 6 As shown, the device includes a memory 620, a transceiver 610, and a processor 600:

[0668] The memory 620 is used to store computer programs; the transceiver 610 is used to send and receive data under the control of the processor 600; the processor 600 is used to read the computer program in the memory 620 and perform the following operations:

[0669] Receiving, through the transceiver 610, first information sent by a centralized unit, where the first information is used to assist in performing operations related to mobility robustness optimization (MRO);

[0670] Among them, performing MRO-related operations includes any of the following:

[0671] directly performing the MRO operation of the distributed unit according to the first information;

[0672] If it is determined after analyzing the first information that the distributed unit needs to perform an MRO operation, performing the MRO operation of the distributed unit;

[0673] If it is determined after analyzing the first information that other network nodes other than the distributed unit need to perform MRO operations, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0674] The information transmission device provided in an embodiment of the present application receives first information sent by a centralized unit for assisting in performing MRO-related operations, wherein performing MRO-related operations includes any one of the following: the distributed unit directly performs the MRO operation of the distributed unit according to the first information; if the distributed unit determines that the distributed unit needs to perform the MRO operation after analyzing the first information, then performs the MRO operation of the distributed unit; if the distributed unit determines that other network nodes other than the distributed unit need to perform the MRO operation after analyzing the first information, then sends second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation; in this way, it supports the implementation of: the distributed unit directly performs the MRO operation based on the first information, or performs the MRO operation after analyzing the first information to determine that it needs to perform the MRO operation, or sends the second information to support the MRO operation after analyzing the first information to determine that other network nodes need to perform the MRO operation; in this way, network optimization in the DU triggered switching scenario can be achieved, which solves the problem that the existing network optimization solution is not suitable for the DU triggered switching scenario.

[0675] Specifically, the transceiver 610 is configured to receive and send data under the control of the processor 600 .

[0676] Among them, Figure 6 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 610 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 when performing operations.

[0677] The processor 600 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0678] In this embodiment of the present application, the first information includes at least one of the following:

[0679] Failure type information;

[0680] Mobile information;

[0681] Time threshold information;

[0682] Self-organizing network SON report information;

[0683] Information of a first cell supporting communication of the terminal;

[0684] Information of a first primary and secondary cell supporting communication of the terminal;

[0685] Candidate cell information;

[0686] Information of candidate primary and secondary cells;

[0687] Switching reason value;

[0688] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0689] In the embodiment of the present application, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0690] In this embodiment of the present application, the SON report information includes at least one of the following:

[0691] Layer 1 or Layer 2 measurement information;

[0692] Restore cell information;

[0693] Candidate cell information;

[0694] Information of candidate primary and secondary cells;

[0695] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0696] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0697] In the embodiment of the present application, analyzing the first information includes:

[0698] Determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal;

[0699] Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication;

[0700] The first network node includes: the distributed unit and / or the other network nodes.

[0701] In the embodiment of the present application, determining the first network node that needs to perform the MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication includes:

[0702] In a case where the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the first network node requiring the MRO operation includes a source SN-DU of the terminal;

[0703] In a case where the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit;

[0704] When the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, the first network node for performing the MRO operation is determined to include the target SN-DU of the terminal.

[0705] In this embodiment of the present application, the second information includes at least one of the following:

[0706] Failure type information;

[0707] Mobile information;

[0708] Time threshold information;

[0709] SON report information;

[0710] Information of a first cell supporting communication of the terminal;

[0711] Information of a first primary and secondary cell supporting communication of the terminal;

[0712] Information of a second cell supporting communication of the terminal;

[0713] Information of a second primary and secondary cell supporting terminal communication;

[0714] Candidate cell information;

[0715] Information of candidate primary and secondary cells;

[0716] Switching reason value;

[0717] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0718] In the embodiment of the present application, analyzing the first information includes:

[0719] In a case where the connection failure is related to the current handover or to the handover timing triggered by the source side or to the handover failure, determining, according to the RLF report information and / or mobility information in the first information, a second network node on which an MRO operation needs to be performed;

[0720] The second network node includes: the distributed unit and / or other distributed units.

[0721] In the embodiment of the present application, analyzing the first information further includes:

[0722] According to the time threshold information and RLF report information in the first information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0723] In the embodiment of the present application, the first information sent by the receiving centralized unit includes:

[0724] A handover report message sent by a centralized unit is received, where the handover report message carries the first information.

[0725] In the embodiment of the present application, when the other network nodes are other distributed units, sending the second information to the other network nodes includes:

[0726] The second information is sent to the other distributed units through the centralized unit.

[0727] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned distributed unit side method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0728] The embodiment of the present application further provides an information transmission device, which is a centralized unit, such as Figure 7As shown, the device includes a memory 720, a transceiver 710, and a processor 700:

[0729] The memory 720 is used to store computer programs; the transceiver 710 is used to send and receive data under the control of the processor 700; the processor 700 is used to read the computer program in the memory 720 and perform the following operations:

[0730] When receiving the SON report information, sending first information to at least one distributed unit through the transceiver 710, where the first information is used to assist in performing MRO-related operations;

[0731] Among them, performing MRO-related operations includes any of the following:

[0732] The distributed unit directly performs the MRO operation of the distributed unit according to the first information;

[0733] If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit;

[0734] If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes;

[0735] The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0736] In an embodiment of the present application, upon receiving SON report information, the information transmission device sends first information to at least one distributed unit, wherein the first information is used to assist in performing MRO-related operations. Performing MRO-related operations includes any of the following: the distributed unit directly performing the MRO operation of the distributed unit based on the first information; if the distributed unit determines that the distributed unit needs to perform the MRO operation after analyzing the first information, then performing the MRO operation of the distributed unit; if the distributed unit determines that other network nodes other than the distributed unit need to perform the MRO operation after analyzing the first information, then sending second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation. This supports the following implementations: the distributed unit directly performing the MRO operation based on the first information, or performing the MRO operation after analyzing the first information and determining that the distributed unit needs to perform the MRO operation, or sending the second information to support the MRO operation after analyzing the first information and determining that other network nodes need to perform the MRO operation. This enables network optimization in DU-triggered switching scenarios, resolving the problem that existing network optimization solutions are not applicable to DU-triggered switching scenarios.

[0737] Specifically, the transceiver 710 is configured to receive and send data under the control of the processor 700 .

[0738] Among them, Figure 7 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 710 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 when performing operations.

[0739] The processor 700 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0740] In this embodiment of the present application, the first information includes at least one of the following:

[0741] Failure type information;

[0742] Mobile information;

[0743] Time threshold information;

[0744] Self-organizing network SON report information;

[0745] Information of a first cell supporting communication of the terminal;

[0746] Information of a first primary and secondary cell supporting communication of the terminal;

[0747] Candidate cell information;

[0748] Information of candidate primary and secondary cells;

[0749] Switching reason value;

[0750] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0751] In the embodiment of the present application, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0752] In this embodiment of the present application, the SON report information includes at least one of the following:

[0753] Layer 1 or Layer 2 measurement information;

[0754] Restore cell information;

[0755] Candidate cell information;

[0756] Information of candidate primary and secondary cells;

[0757] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0758] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0759] Optionally, the operation further includes:

[0760] The candidate cells or candidate primary and secondary cells selected by the centralized unit are updated.

[0761] In the embodiment of the present application, the operation further includes:

[0762] determining, based on the third information, a third network node on which an MRO operation needs to be performed;

[0763] Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit;

[0764] The third information includes at least one of RLF report information, information of a first cell supporting terminal communication or information of a first primary and secondary cell supporting terminal communication, and information of a second cell supporting terminal communication or information of a second primary and secondary cell supporting terminal communication.

[0765] In the embodiment of the present application, before determining the third network node on which the MRO operation is required to be performed according to the third information, the operation further includes:

[0766] According to the SCG failure information, information about a first cell supporting communication of the terminal or information about a first primary and secondary cell supporting communication of the terminal is determined.

[0767] In the embodiment of the present application, before determining the third network node on which the MRO operation is required to be performed according to the third information, the operation further includes:

[0768] receiving the second information sent by a first distributed unit among the at least one distributed unit according to the first information;

[0769] The first distributed unit is: a secondary node distributed unit SN-DU that provides services to the terminal before RLF, or a source SN-DU of the terminal.

[0770] In this embodiment of the present application, the second information includes at least one of the following:

[0771] Failure type information;

[0772] Mobile information;

[0773] Time threshold information;

[0774] SON report information;

[0775] Information of a first cell supporting communication of the terminal;

[0776] Information of a first primary and secondary cell supporting communication of the terminal;

[0777] Information of a second cell supporting communication of the terminal;

[0778] Information of a second primary and secondary cell supporting terminal communication;

[0779] Candidate cell information;

[0780] Information of candidate primary and secondary cells;

[0781] Switching reason value;

[0782] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0783] In the embodiment of the present application, updating the candidate cells or candidate primary and secondary cells selected by the centralized unit includes:

[0784] The candidate cell or candidate primary and secondary cells selected by the centralization unit is updated according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication.

[0785] In the embodiment of the present application, determining the third network node that needs to perform the MRO operation according to the third information includes:

[0786] In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes a source SN-DU of the terminal;

[0787] When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit;

[0788] When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

[0789] In the embodiment of the present application, determining the third network node that needs to perform the MRO operation according to the third information includes:

[0790] In the case that the connection failure is related to the current handover, or is related to the handover timing triggered by the source side, or is related to the handover failure, the third network node that needs to perform the MRO operation is determined according to the third information.

[0791] In the embodiment of the present application, determining the third network node that needs to perform the MRO operation according to the third information further includes:

[0792] According to the time threshold information and the RLF report information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

[0793] In the embodiment of the present application, the sending of the first information to at least one distributed unit includes:

[0794] A handover report message is sent to at least one distributed unit, where the handover report message carries the first information.

[0795] In the embodiment of the present application, the operation further includes:

[0796] In a case where the other network node is another distributed unit, the second information is sent to the other distributed unit.

[0797] It should be noted here that the above-mentioned equipment provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned centralized unit side method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0798] The embodiment of the present application also provides an information transmission device, which is applied to a distributed unit, such as Figure 8 As shown, the device includes:

[0799] A receiving unit 801 is configured to receive first information sent by a centralized unit, where the first information is used to assist in performing operations related to mobility robustness optimization (MRO);

[0800] Among them, performing MRO-related operations includes any of the following:

[0801] directly performing the MRO operation of the distributed unit according to the first information;

[0802] If it is determined after analyzing the first information that the distributed unit needs to perform an MRO operation, performing the MRO operation of the distributed unit;

[0803] If it is determined after analyzing the first information that other network nodes other than the distributed unit need to perform MRO operations, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0804] The information transmission device of an embodiment of the present application receives first information sent by a centralized unit for assisting in performing MRO-related operations, wherein performing MRO-related operations includes any one of the following: the distributed unit directly performs the MRO operation of the distributed unit according to the first information; if the distributed unit determines that the distributed unit needs to perform the MRO operation after analyzing the first information, then performs the MRO operation of the distributed unit; if the distributed unit determines that other network nodes other than the distributed unit need to perform the MRO operation after analyzing the first information, then sends second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation; in this way, it supports the implementation of: the distributed unit directly performs the MRO operation based on the first information, or performs the MRO operation after analyzing the first information to determine that it needs to perform the MRO operation, or sends the second information to support the MRO operation after analyzing the first information to determine that other network nodes need to perform the MRO operation; in this way, network optimization in the DU triggered switching scenario can be achieved, which solves the problem that the existing network optimization solution is not applicable to the DU triggered switching scenario.

[0805] The first information includes at least one of the following:

[0806] Failure type information;

[0807] Mobile information;

[0808] Time threshold information;

[0809] Self-organizing network SON report information;

[0810] Information of a first cell supporting communication of the terminal;

[0811] Information of a first primary and secondary cell supporting communication of the terminal;

[0812] Candidate cell information;

[0813] Information of candidate primary and secondary cells;

[0814] Switching reason value;

[0815] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0816] Specifically, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0817] Specifically, the SON report information includes at least one of the following:

[0818] Layer 1 or Layer 2 measurement information;

[0819] Restore cell information;

[0820] Candidate cell information;

[0821] Information of candidate primary and secondary cells;

[0822] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0823] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0824] In the embodiment of the present application, analyzing the first information includes:

[0825] Determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal;

[0826] Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication;

[0827] The first network node includes: the distributed unit and / or the other network nodes.

[0828] In the embodiment of the present application, determining the first network node that needs to perform the MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication includes:

[0829] In a case where the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the first network node requiring the MRO operation includes a source SN-DU of the terminal;

[0830] In a case where the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit;

[0831] When the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, the first network node for performing the MRO operation is determined to include the target SN-DU of the terminal.

[0832] The second information includes at least one of the following:

[0833] Failure type information;

[0834] Mobile information;

[0835] Time threshold information;

[0836] SON report information;

[0837] Information of a first cell supporting communication of the terminal;

[0838] Information of a first primary and secondary cell supporting communication of the terminal;

[0839] Information of a second cell supporting communication of the terminal;

[0840] Information of a second primary and secondary cell supporting terminal communication;

[0841] Candidate cell information;

[0842] Information of candidate primary and secondary cells;

[0843] Switching reason value;

[0844] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0845] In an embodiment of the present application, analyzing the first information includes: when the connection failure is related to the current handover or is related to the timing of the handover triggered by the source side or is related to the handover failure, determining the second network node on which the MRO operation needs to be performed based on the RLF report information and / or mobility information in the first information; wherein the second network node includes: the distributed unit and / or other distributed units.

[0846] In an embodiment of the present application, analyzing the first information further includes: judging whether the connection failure is related to the current switching or related to the timing of the switching triggered by the source side based on the time threshold information and RLF report information in the first information.

[0847] In the embodiment of the present application, when the receiving unit 801 is used to receive the first information sent by the centralized unit, it is specifically used to: receive a handover report message sent by the centralized unit, where the handover report message carries the first information.

[0848] In the embodiment of the present application, when the other network nodes are other distributed units, sending the second information to the other network nodes includes: sending the second information to the other distributed units through the centralized unit.

[0849] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned distributed unit side method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0850] The embodiment of the present application also provides an information transmission device, which is applied to a centralized unit, such as Figure 9 As shown, the device includes:

[0851] The first sending unit 901 is configured to send first information to at least one distributed unit when receiving SON report information, where the first information is used to assist in performing MRO-related operations;

[0852] Among them, performing MRO-related operations includes any of the following:

[0853] The distributed unit directly performs the MRO operation of the distributed unit according to the first information;

[0854] If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit;

[0855] If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes;

[0856] The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

[0857] In an information transmission device according to an embodiment of the present application, upon receiving SON report information, first information is sent to at least one distributed unit, wherein the first information is used to assist in performing MRO-related operations. Performing MRO-related operations includes any of the following: the distributed unit directly performing the MRO operation of the distributed unit based on the first information; if the distributed unit determines that the distributed unit needs to perform the MRO operation after analyzing the first information, then performing the MRO operation of the distributed unit; if the distributed unit determines that other network nodes other than the distributed unit need to perform the MRO operation after analyzing the first information, then sending second information to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing the MRO operation. This supports the following implementations: the distributed unit directly performing the MRO operation based on the first information, performing the MRO operation after analyzing the first information and determining that the distributed unit needs to perform the MRO operation, or sending the second information to support the MRO operation after analyzing the first information and determining that other network nodes need to perform the MRO operation. This enables network optimization in DU-triggered handover scenarios, resolving the problem that existing network optimization solutions are not applicable to DU-triggered handover scenarios.

[0858] The first information includes at least one of the following:

[0859] Failure type information;

[0860] Mobile information;

[0861] Time threshold information;

[0862] Self-organizing network SON report information;

[0863] Information of a first cell supporting communication of the terminal;

[0864] Information of a first primary and secondary cell supporting communication of the terminal;

[0865] Candidate cell information;

[0866] Information of candidate primary and secondary cells;

[0867] Switching reason value;

[0868] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0869] Specifically, the SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

[0870] Specifically, the SON report information includes at least one of the following:

[0871] Layer 1 or Layer 2 measurement information;

[0872] Restore cell information;

[0873] Candidate cell information;

[0874] Information of candidate primary and secondary cells;

[0875] First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell;

[0876] Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

[0877] Optionally, the device further includes:

[0878] The updating unit is configured to update the candidate cells or candidate primary and secondary cells selected by the centralization unit.

[0879] In the embodiment of the present application, the device further includes:

[0880] A first determining unit, configured to determine, based on the third information, a third network node on which an MRO operation needs to be performed;

[0881] Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit;

[0882] The third information includes at least one of RLF report information, information of a first cell supporting terminal communication or information of a first primary and secondary cell supporting terminal communication, and information of a second cell supporting terminal communication or information of a second primary and secondary cell supporting terminal communication.

[0883] In the embodiment of the present application, the device further includes:

[0884] The second determining unit is configured to determine information of the first cell supporting terminal communication or information of the first primary and secondary cells supporting terminal communication according to the SCG failure information before the first determining unit determines the third network node requiring MRO operation according to the third information.

[0885] In the embodiment of the present application, the device further includes:

[0886] a receiving unit, configured to receive, before the first determining unit determines, based on the third information, the third network node on which the MRO operation needs to be performed, the second information sent by the first distributed unit among the at least one distributed unit according to the first information;

[0887] The first distributed unit is: a secondary node distributed unit SN-DU that provides services to the terminal before RLF, or a source SN-DU of the terminal.

[0888] The second information includes at least one of the following:

[0889] Failure type information;

[0890] Mobile information;

[0891] Time threshold information;

[0892] SON report information;

[0893] Information of a first cell supporting communication of the terminal;

[0894] Information of a first primary and secondary cell supporting communication of the terminal;

[0895] Information of a second cell supporting communication of the terminal;

[0896] Information of a second primary and secondary cell supporting terminal communication;

[0897] Candidate cell information;

[0898] Information of candidate primary and secondary cells;

[0899] Switching reason value;

[0900] Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

[0901] In an embodiment of the present application, when the update unit is used to update the candidate cell or candidate primary and secondary cell selected by the centralized unit, it is specifically used to: update the candidate cell or candidate primary and secondary cell selected by the centralized unit according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cell supporting terminal communication.

[0902] In the embodiment of the present application, when the first determining unit is used to determine the third network node on which the MRO operation needs to be performed according to the third information, it is specifically used to:

[0903] In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes a source SN-DU of the terminal;

[0904] When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit;

[0905] When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

[0906] In an embodiment of the present application, when the first determination unit is used to determine the third network node on which the MRO operation needs to be performed based on the third information, it is specifically used to: when the connection failure is related to the current switching or is related to the switching timing triggered by the source side or is related to the switching failure, determine the third network node on which the MRO operation needs to be performed based on the third information.

[0907] In an embodiment of the present application, when the first determination unit is used to determine the third network node on which the MRO operation needs to be performed based on the third information, it is specifically further used to: determine whether the connection failure is related to the current switch or is related to the timing of the switch triggered by the source side based on the time threshold information and the RLF report information.

[0908] In the embodiment of the present application, when the first sending unit 901 is used to send the first information to at least one distributed unit, it is specifically used to: send a switching report message to the at least one distributed unit, where the switching report message carries the first information.

[0909] In the embodiment of the present application, the device further includes:

[0910] The second sending unit is configured to send the second information to other distributed units when the other network nodes are other distributed units.

[0911] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned centralized unit side method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0912] 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.

[0913] 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 technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of 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 method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0914] An embodiment of the present application further provides a non-transitory readable storage medium storing a computer program, wherein the computer program is used to enable a processor to execute the information transmission method applied to a distributed unit or a centralized unit as described above.

[0915] The non-transitory 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), etc.), optical storage (such as compact discs (CD), digital video discs (DVD), Blu-ray discs (BD), high-definition versatile discs (HVD), etc.), and semiconductor storage (such as ROM, erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), non-volatile memory (NAND (Non-volatile Memory Device) FLASH), solid-state drives (SSD)), etc.

[0916] Among them, the implementation embodiments of the above-mentioned information transmission method applied to distributed units or centralized units are all applicable to the embodiments of the non-transitory readable storage medium and can also achieve the same technical effects.

[0917] An embodiment of the present application also provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, the various processes of the above-mentioned information transmission method embodiment applied to distributed units or centralized units are implemented, and the same technical effect can be achieved. To avoid repetition, they will not be repeated here.

[0918] 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.

[0919] 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.

[0920] 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.

[0921] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0922] 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. An information transmission method, applied to a distributed unit, characterized in that: include: receiving first information sent by a centralized unit, where the first information is used to assist in performing a mobility robustness optimization (MRO) related operation; Among them, performing MRO-related operations includes any of the following: The distributed unit directly performs the MRO operation of the distributed unit according to the first information; If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit; If the distributed unit determines that other network nodes other than the distributed unit need to perform MRO operations after analyzing the first information, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

2. The information transmission method according to claim 1, wherein: The first information includes at least one of the following: Failure type information; Mobile information; Time threshold information; Self-organizing network SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

3. The information transmission method according to claim 2, wherein: The SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

4. The information transmission method according to claim 2 or 3, characterized in that: The SON report information includes at least one of the following: Layer 1 or Layer 2 measurement information; Restore cell information; Candidate cell information; Information of candidate primary and secondary cells; First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell; Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

5. The information transmission method according to claim 3, wherein: Analyzing the first information includes: Determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal; Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication; The first network node includes: the distributed unit and / or the other network nodes.

6. The information transmission method according to claim 5, characterized in that: The determining, according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication, the first network node requiring MRO operation includes: In a case where the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the first network node requiring the MRO operation includes a source SN-DU of the terminal; In a case where the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit; When the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, the first network node for performing the MRO operation is determined to include the target SN-DU of the terminal.

7. The information transmission method according to claim 5, characterized in that: The second information includes at least one of the following: Failure type information; Mobile information; Time threshold information; SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Information of a second cell supporting communication of the terminal; Information of a second primary and secondary cell supporting terminal communication; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

8. The information transmission method according to claim 3, wherein: Analyzing the first information includes: In a case where the connection failure is related to the current handover or to the handover timing triggered by the source side or to the handover failure, determining, according to the RLF report information and / or mobility information in the first information, a second network node on which an MRO operation needs to be performed; The second network node includes: the distributed unit and / or other distributed units.

9. The information transmission method according to claim 8, characterized in that: Analyzing the first information further includes: According to the time threshold information and RLF report information in the first information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

10. The information transmission method according to claim 1 or 2, characterized in that: The receiving unit sends the first information, including: A handover report message sent by a centralized unit is received, where the handover report message carries the first information.

11. The information transmission method according to claim 1, wherein: In a case where the other network node is another distributed unit, the sending the second information to the other network node includes: The second information is sent to the other distributed units through the centralized unit.

12. An information transmission method, applied to a centralized unit, characterized in that: include: Upon receiving the SON report information, sending first information to at least one distributed unit, where the first information is used to assist in performing MRO-related operations; Among them, performing MRO-related operations includes any of the following: The distributed unit directly performs the MRO operation of the distributed unit according to the first information; If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit; If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes; The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

13. The information transmission method according to claim 12, characterized in that: The first information includes at least one of the following: Failure type information; Mobile information; Time threshold information; Self-organizing network SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

14. The information transmission method according to claim 13, characterized in that: The SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

15. The information transmission method according to claim 13 or 14, characterized in that: The SON report information includes at least one of the following: Layer 1 or Layer 2 measurement information; Restore cell information; Candidate cell information; Information of candidate primary and secondary cells; First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell; Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

16. The information transmission method according to claim 12, wherein: Also includes: The candidate cells or candidate primary and secondary cells selected by the centralized unit are updated.

17. The information transmission method according to claim 12 or 16, characterized in that: Also includes: determining, based on the third information, a third network node on which an MRO operation needs to be performed; Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit; The third information includes at least one of RLF report information, information of a first cell supporting terminal communication or information of a first primary and secondary cell supporting terminal communication, and information of a second cell supporting terminal communication or information of a second primary and secondary cell supporting terminal communication.

18. The information transmission method according to claim 17, characterized in that: Before determining the third network node on which the MRO operation is required according to the third information, the method further includes: According to the SCG failure information, information about a first cell supporting communication of the terminal or information about a first primary and secondary cell supporting communication of the terminal is determined.

19. The information transmission method according to claim 17, wherein: Before determining the third network node on which the MRO operation is required according to the third information, the method further includes: receiving the second information sent by a first distributed unit among the at least one distributed unit according to the first information; The first distributed unit is: a secondary node distributed unit SN-DU that provides services to the terminal before RLF, or a source SN-DU of the terminal.

20. The information transmission method according to claim 19, characterized in that: The second information includes at least one of the following: Failure type information; Mobile information; Time threshold information; SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Information of a second cell supporting communication of the terminal; Information of a second primary and secondary cell supporting terminal communication; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

21. The information transmission method according to claim 17, wherein: Updating the candidate cells or candidate primary and secondary cells selected by the centralized unit includes: The candidate cell or candidate primary and secondary cells selected by the centralization unit is updated according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication.

22. The information transmission method according to claim 17, wherein: The determining, according to the third information, a third network node on which the MRO operation needs to be performed includes: In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes a source SN-DU of the terminal; When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit; When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

23. The information transmission method according to claim 17, wherein: The determining, according to the third information, a third network node on which the MRO operation needs to be performed includes: In the case that the connection failure is related to the current handover, or is related to the handover timing triggered by the source side, or is related to the handover failure, the third network node that needs to perform the MRO operation is determined according to the third information.

24. The information transmission method according to claim 23, characterized in that: Also includes: According to the time threshold information and the RLF report information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

25. The information transmission method according to claim 12 or 13, characterized in that: The sending the first information to at least one distributed unit includes: A handover report message is sent to at least one distributed unit, where the handover report message carries the first information.

26. The information transmission method according to claim 12, characterized in that: Also includes: In a case where the other network node is another distributed unit, the second information is sent to the other distributed unit.

27. An information transmission device, characterized in that: The information transmission device is a distributed unit, and the device includes a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Receiving, by the transceiver, first information sent by a centralized unit, where the first information is used to assist in performing operations related to mobility robustness optimization (MRO); Among them, performing MRO-related operations includes any of the following: directly performing the MRO operation of the distributed unit according to the first information; If it is determined after analyzing the first information that the distributed unit needs to perform an MRO operation, performing the MRO operation of the distributed unit; If it is determined after analyzing the first information that other network nodes other than the distributed unit need to perform MRO operations, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

28. The information transmission device according to claim 27, characterized in that The first information includes at least one of the following: Failure type information; Mobile information; Time threshold information; Self-organizing network SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

29. The information transmission device according to claim 28, characterized in that The SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

30. The information transmission device according to claim 28 or 29, characterized in that: The SON report information includes at least one of the following: Layer 1 or Layer 2 measurement information; Restore cell information; Candidate cell information; Information of candidate primary and secondary cells; First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell; Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

31. The information transmission device according to claim 29, characterized in that Analyzing the first information includes: Determining, according to the SCG failure information in the first information, information of a second cell supporting communication of the terminal or information of a second primary and secondary cell supporting communication of the terminal; Determining a first network node that needs to perform an MRO operation according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication; The first network node includes: the distributed unit and / or the other network nodes.

32. The information transmission device according to claim 31, characterized in that The determining, according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication, the first network node requiring MRO operation includes: In a case where the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the first network node requiring the MRO operation includes a source SN-DU of the terminal; In a case where the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the first network node requiring the MRO operation includes the centralized unit; When the second primary and secondary cells supporting terminal communication belong to the candidate primary and secondary cells configured by the centralized unit but do not belong to the candidate primary and secondary cells selected by the target SN, the first network node for performing the MRO operation is determined to include the target SN-DU of the terminal.

33. The information transmission device according to claim 31, characterized in that The second information includes at least one of the following: Failure type information; Mobile information; Time threshold information; SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Information of a second cell supporting communication of the terminal; Information of a second primary and secondary cell supporting terminal communication; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

34. The information transmission device according to claim 29, characterized in that Analyzing the first information includes: In a case where the connection failure is related to the current handover or to the handover timing triggered by the source side or to the handover failure, determining, according to the RLF report information and / or mobility information in the first information, a second network node on which an MRO operation needs to be performed; The second network node includes: the distributed unit and / or other distributed units.

35. The information transmission device according to claim 34, characterized in that Analyzing the first information further includes: According to the time threshold information and RLF report information in the first information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

36. The information transmission device according to claim 27 or 28, characterized in that: The receiving unit sends the first information, including: A handover report message sent by a centralized unit is received, where the handover report message carries the first information.

37. The information transmission device according to claim 27, characterized in that In a case where the other network node is another distributed unit, the sending the second information to the other network node includes: The second information is sent to the other distributed units through the centralized unit.

38. An information transmission device, the information transmission device being a centralized unit, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: When receiving the SON report information, sending first information to at least one distributed unit through the transceiver, where the first information is used to assist in performing MRO-related operations; Among them, performing MRO-related operations includes any of the following: The distributed unit directly performs the MRO operation of the distributed unit according to the first information; If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit; If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes; The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

39. The information transmission device according to claim 38, characterized in that The first information includes at least one of the following: Failure type information; Mobile information; Time threshold information; Self-organizing network SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

40. The information transmission device according to claim 39, characterized in that The SON report information includes: radio link failure RLF report information and / or secondary cell group SCG failure information.

41. The information transmission device according to claim 39 or 40, characterized in that: The SON report information includes at least one of the following: Layer 1 or Layer 2 measurement information; Restore cell information; Candidate cell information; Information of candidate primary and secondary cells; First indication information, where the first indication information is used to indicate whether the cell successfully accessed by the terminal belongs to a candidate cell or a candidate primary and secondary cell; Second indication information, where the second indication information is used to indicate the execution of layer 1 or layer 2 triggered switching.

42. The information transmission device according to claim 38, characterized in that The operations further include: The candidate cells or candidate primary and secondary cells selected by the centralized unit are updated.

43. The information transmission device according to claim 38 or 42, characterized in that: The operations further include: determining, based on the third information, a third network node on which an MRO operation needs to be performed; Wherein, the third network node includes: the at least one distributed unit and / or the centralized unit; The third information includes at least one of RLF report information, information of a first cell supporting terminal communication or information of a first primary and secondary cell supporting terminal communication, and information of a second cell supporting terminal communication or information of a second primary and secondary cell supporting terminal communication.

44. The information transmission device according to claim 43, characterized in that Before determining, according to the third information, the third network node on which the MRO operation is required, the operation further includes: According to the SCG failure information, information about a first cell supporting communication of the terminal or information about a first primary and secondary cell supporting communication of the terminal is determined.

45. The information transmission device according to claim 43, characterized in that Before determining, according to the third information, the third network node on which the MRO operation is required, the operation further includes: receiving the second information sent by a first distributed unit among the at least one distributed unit according to the first information; The first distributed unit is: a secondary node distributed unit SN-DU that provides services to the terminal before RLF, or a source SN-DU of the terminal.

46. The information transmission device according to claim 45, characterized in that The second information includes at least one of the following: Failure type information; Mobile information; Time threshold information; SON report information; Information of a first cell supporting communication of the terminal; Information of a first primary and secondary cell supporting communication of the terminal; Information of a second cell supporting communication of the terminal; Information of a second primary and secondary cell supporting terminal communication; Candidate cell information; Information of candidate primary and secondary cells; Switching reason value; Reference information, the reference information including: at least one of source cell information, target cell information, restored cell information, re-established cell information and re-connected cell information.

47. The information transmission device according to claim 43, characterized in that Updating the candidate cells or candidate primary and secondary cells selected by the centralized unit includes: The candidate cell or candidate primary and secondary cells selected by the centralization unit is updated according to the information of the second cell supporting terminal communication or the information of the second primary and secondary cells supporting terminal communication.

48. The information transmission device according to claim 43, characterized in that The determining, according to the third information, a third network node on which the MRO operation needs to be performed includes: In a case where the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal belongs to a candidate primary and secondary cell selected by the target secondary node SN, determining that the third network node requiring the MRO operation includes a source SN-DU of the terminal; When the first primary and secondary cell supporting communication of the terminal or the second primary and secondary cell supporting communication of the terminal does not belong to the candidate primary and secondary cells configured by the centralized unit, determining that the third network node requiring the MRO operation includes the centralized unit; When the first primary and secondary cell supporting terminal communication or the second primary and secondary cell supporting terminal communication belongs to the candidate primary and secondary cells configured by the centralized unit but does not belong to the candidate primary and secondary cells selected by the target SN, the third network node determining the need for MRO operation includes the target SN-DU of the terminal.

49. The information transmission device according to claim 43, characterized in that The determining, according to the third information, a third network node on which the MRO operation needs to be performed includes: In the case that the connection failure is related to the current handover, or is related to the handover timing triggered by the source side, or is related to the handover failure, the third network node that needs to perform the MRO operation is determined according to the third information.

50. The information transmission device according to claim 49, characterized in that Also includes: According to the time threshold information and the RLF report information, it is determined whether the connection failure is related to the current handover or to the timing of the handover triggered by the source side.

51. The information transmission device according to claim 38 or 39, characterized in that: The sending the first information to at least one distributed unit includes: A handover report message is sent to at least one distributed unit, where the handover report message carries the first information.

52. The information transmission device according to claim 38, characterized in that The operations further include: In a case where the other network node is another distributed unit, the second information is sent to the other distributed unit.

53. An information transmission device, applied to a distributed unit, characterized in that: The device comprises: A receiving unit, configured to receive first information sent by a central unit, where the first information is used to assist in performing operations related to mobility robustness optimization (MRO); Among them, performing MRO-related operations includes any of the following: directly performing the MRO operation of the distributed unit according to the first information; If it is determined after analyzing the first information that the distributed unit needs to perform an MRO operation, performing the MRO operation of the distributed unit; If it is determined after analyzing the first information that other network nodes other than the distributed unit need to perform MRO operations, second information is sent to the other network nodes; the other network nodes include: at least one other distributed unit other than the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

54. An information transmission device, applied to a centralized unit, characterized in that: The device comprises: A first sending unit is configured to send first information to at least one distributed unit when receiving SON report information, where the first information is used to assist in performing MRO-related operations; Among them, performing MRO-related operations includes any of the following: The distributed unit directly performs the MRO operation of the distributed unit according to the first information; If the distributed unit determines that the distributed unit needs to perform an MRO operation after analyzing the first information, performing the MRO operation of the distributed unit; If the distributed unit determines that other network nodes other than the distributed unit need to perform an MRO operation after analyzing the first information, sending second information to the other network nodes; The other network nodes include: at least one other distributed unit except the distributed unit and / or the centralized unit; the second information is used to assist in performing MRO operations.

55. A non-transitory readable storage medium, characterized in that The non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the information transmission method according to any one of claims 1 to 26.

56. A computer program product, characterized in that The method comprises computer instructions, which, when executed by a processor, implement the information transmission method according to any one of claims 1 to 26.

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