Method, system and base station system for processing failure of conditional primary and secondary cell change
By analyzing the failure type of user equipment when the condition primary and secondary cell changes fail, and adjusting the network configuration parameters according to the type, the problem of failure of the condition primary and secondary cell changes is solved, and the success rate is improved.
Patent Information
- Application Number
- CN202110142464.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-02-02
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2041-02-02
AI Technical Summary
User equipment fails when changing the conditional primary and secondary cells, resulting in a low success rate.
By receiving the failure information of the main and auxiliary cell group that contains the conditional change failure indication information of the primary and secondary cell, and analyzing the failure type of the user equipment, the network configuration parameters are adjusted according to the failure type by the user equipment.
The success rate of conditional primary and secondary cell changes is improved, and the problem of triggering time too late, too early and incorrect conditional primary and secondary cell changes is solved by dynamically adjusting the signal quality threshold and reconfiguring the candidate target primary and secondary cell.
Smart Images
Figure CN114845320B_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of wireless communications, and in particular to a method, a processing system and a base station system for processing a conditional primary and secondary cell change failure. Background Art
[0002] The introduction of dual-connectivity technology in the field of wireless communication technology allows different base stations to be split through the X2 / Xn interface, improving the network's coverage capacity and spectrum utilization. MR-DC (Multi-Radio Access Technology Dual Connectivity) technology allows UE (User Equipment) to access MN (Master Node) and SN (Secondary Node) at the same time. This technology has been widely used in 4G (4th Generation) and 5G (5th Generation) coexistence scenarios.
[0003] A conditional primary secondary cell (PSCell) change (Conditional PSCell Change) technology related to MR-DC: MN configures UE to perform a Conditional PSCell Change process. The UE receives reference signals of surrounding candidate SN cells based on their quality. When a candidate SN cell meets the configured threshold, the UE initiates access and synchronization with the SN without having to report measurement reports to the MN.
[0004] However, the inventors have discovered that a user equipment may fail when performing a conditional primary or secondary cell change. Summary of the invention
[0005] A technical problem to be solved by the embodiments of the present disclosure is to improve the success rate of conditional primary and secondary cell changes.
[0006] Some embodiments of the present disclosure provide a method for processing a conditional primary and secondary cell change failure, including:
[0007] When the user equipment fails to perform conditional primary and secondary cell change, receiving primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment;
[0008] Analyzing the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment;
[0009] A network configuration parameter is adjusted based on the failure type.
[0010] In some embodiments, for the conditional primary and secondary cell change process initiated by the master node:
[0011] When the user equipment fails to perform conditional primary and secondary cell change, the master node receives primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment;
[0012] The master node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment;
[0013] The master node adjusts the network configuration parameters according to the failure type.
[0014] In some embodiments, for the conditional primary and secondary cell change process initiated by the source secondary node:
[0015] When the user equipment fails to perform conditional primary and secondary cell change, the master node receives primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment;
[0016] The primary node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment, and sends the failure type to the source secondary node;
[0017] The source secondary node adjusts the network configuration parameters according to the failure type.
[0018] In some embodiments, for the conditional primary and secondary cell change process initiated by the source secondary node:
[0019] When the conditional primary and secondary cell change of the user equipment fails, the primary node receives the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and sends it to the candidate secondary node;
[0020] The candidate secondary node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment, and directly sends the information to the source secondary node or forwards the information to the source secondary node through the primary node;
[0021] The source secondary node adjusts the network configuration parameters according to the failure type.
[0022] In some embodiments, for the conditional primary and secondary cell change process initiated by the source secondary node:
[0023] When the conditional primary and secondary cell change of the user equipment fails, the primary node receives the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and sends it to the source secondary node;
[0024] The source secondary node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment;
[0025] The source secondary node adjusts the network configuration parameters according to the failure type.
[0026] In some embodiments, analysis failure types include:
[0027] When the primary and secondary cell group failure information reported by the user equipment shows that the user equipment has not switched to any candidate target primary and secondary cell for more than the first time threshold, and a radio link connection failure occurs between the user equipment and the primary and secondary cells of the source secondary node, it is determined that the failure type is a failure caused by a conditional primary and secondary cell change trigger time being too late;
[0028] Alternatively, when the primary and secondary cell group failure information reported by the user equipment shows that the user equipment is successfully switched to the target primary and secondary cell, and a radio link connection failure occurs between the user equipment and the target primary and secondary cell when the time is less than the second time threshold, it is determined that the failure type is a failure caused by a conditional primary and secondary cell change trigger time being too early;
[0029] Alternatively, when the primary and secondary cell group failure information reported by the user equipment shows that the primary and secondary cell where the user equipment has a radio link connection failure does not belong to the candidate target primary and secondary cell configured by the network for the user equipment, it is determined that the failure type is a trigger condition primary and secondary cell that changes to an error condition primary and secondary cell.
[0030] In some embodiments, adjusting the network configuration parameters according to the failure type includes:
[0031] When the failure type is a failure caused by too late triggering time of the primary and secondary cell change, the signal quality threshold for triggering the primary and secondary cell change is lowered, wherein, when the user equipment measures that the received signal strength of the candidate secondary node meets the signal quality threshold, the user equipment disconnects the primary and secondary cell of the source secondary node, and initiates access to the primary and secondary cell of the target secondary node using the candidate secondary node as the target secondary node;
[0032] When the failure type is caused by the primary and secondary cell change being triggered too early, the signal quality threshold for triggering the primary and secondary cell change is increased;
[0033] When the failure type is a trigger condition primary and secondary cell that changes to an error condition primary and secondary cell, the candidate target primary and secondary cells are reconfigured.
[0034] In some embodiments, the failure type is added to the secondary cell change failure report, and the secondary cell change failure report further adds conditional primary and secondary cell change failure indication information to indicate that it is a report of conditional primary and secondary cell change failure.
[0035] In some embodiments, the primary node adds the primary and secondary cell group failure information containing the conditional primary and secondary cell change failure indication information to the wireless link connection failure indication signaling and sends it to the secondary node that last provided service to the user to indicate that the wireless link connection failure was caused by the conditional primary and secondary cell change.
[0036] Some embodiments of the present disclosure provide a base station system, including: a memory; and a processor coupled to the memory, wherein the processor is configured to execute the method for processing the conditional primary and secondary cell change failure of each embodiment based on instructions stored in the memory.
[0037] Some embodiments of the present disclosure propose a processing system for conditional primary and secondary cell change failure, including: a base station system, and a user equipment, which is configured to send secondary cell group failure information to a master node in the base station system when a conditional primary and secondary cell change fails, wherein conditional primary and secondary cell change failure indication information is added.
[0038] In some embodiments, the conditional primary and secondary cell change process initiated by the master node of the base station system:
[0039] The master node of the base station system is configured as:
[0040] When the user equipment fails to perform a conditional primary and secondary cell change, receiving conditional primary and secondary cell change failure indication information sent by the user equipment;
[0041] Analyzing the failure type based on the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment;
[0042] A network configuration parameter is adjusted based on the failure type.
[0043] In some embodiments, the conditional primary and secondary cell change process initiated by the source secondary node of the base station system:
[0044] The master node of the base station system is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment; analyze the failure type based on the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment, and send the failure type to the source secondary node;
[0045] The source secondary node of the base station system is configured to adjust network configuration parameters according to the failure type.
[0046] In some embodiments, the conditional primary and secondary cell change process initiated by the source secondary node of the base station system:
[0047] The master node of the base station system is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and send it to the candidate secondary node;
[0048] The candidate secondary node of the base station system is configured to: analyze the failure type based on the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment, and directly send the information to the source secondary node or forward the information to the source secondary node through the primary node;
[0049] The source secondary node of the base station system is configured to adjust network configuration parameters according to the failure type.
[0050] In some embodiments, for the conditional primary and secondary cell change process initiated by the source secondary node:
[0051] The master node of the base station system is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and send it to the source secondary node;
[0052] The source secondary node of the base station system is configured to: analyze the failure type based on the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment; and adjust the network configuration parameters according to the failure type.
[0053] Some embodiments of the present disclosure provide a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for processing a conditional primary and secondary cell change failure of each embodiment.
[0054] The disclosed embodiment receives primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by a user equipment, analyzes the failure type in combination with historical network information of the user equipment, and adjusts network configuration parameters according to the failure type, thereby improving the success rate of conditional primary and secondary cell changes. BRIEF DESCRIPTION OF THE DRAWINGS
[0055] The following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. The present disclosure can be more clearly understood according to the following detailed description with reference to the drawings.
[0056] Obviously, the drawings described below are only some embodiments of the present disclosure, and a person skilled in the art can obtain other drawings based on these drawings without creative work.
[0057] Figure 1 is a schematic diagram of MR-DC according to some embodiments of the present disclosure.
[0058] Figure 2 A flowchart of a method for processing a conditional primary and secondary cell change failure according to some embodiments of the present disclosure is shown.
[0059] Figure 3 A flow chart of a method for processing a conditional primary / secondary cell change failure in a conditional primary / secondary cell change procedure initiated by a master node in some embodiments of the present disclosure is shown.
[0060] Figure 4 A flow chart of a method for processing a conditional primary / secondary cell change failure in a conditional primary / secondary cell change procedure initiated by a secondary node in some embodiments of the present disclosure is shown.
[0061] Figure 5 A flow chart of a method for processing a conditional primary / secondary cell change failure in a conditional primary / secondary cell change procedure initiated by a secondary node in some embodiments of the present disclosure is shown.
[0062] Figure 6 A flow chart of a method for processing a conditional primary / secondary cell change failure in a conditional primary / secondary cell change procedure initiated by a secondary node in some embodiments of the present disclosure is shown.
[0063] Figure 7 A schematic diagram of a system for processing a conditional primary and secondary cell change failure according to some embodiments of the present disclosure is shown.
[0064] Figure 8 A schematic diagram showing a base station system according to some embodiments of the present disclosure. DETAILED DESCRIPTION
[0065] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.
[0066] Unless otherwise specified, descriptions such as “first” and “second” in the present disclosure are used to distinguish different objects and are not used to indicate meanings such as size or time sequence.
[0067] Figure 1 is a schematic diagram of MR-DC according to some embodiments of the present disclosure.
[0068] In MR-DC, DC is the working mode in which the UE is connected to two base stations, and MR refers to multiple RATs (Radio Access Technology). For example, in one MR-DC technology, the UE is connected to an eNB (4G base station) and a gNB (5G base station) respectively.
[0069] In MR-DC, the base station node whose control plane is directly connected to the core network is called MN (Master Node), and the base station node whose control plane is not directly connected to the core network is called SN (Secondary Node). Figure 1 The eNB directly connected to the EPC (Evolved Packet Core) is the MN, and the gNB not directly connected to the EPC is the SN.
[0070] According to the different situations of the two base stations connected to the UE, MR-DC includes multiple specific modes such as EN-DC, NE-DC, and NR-DC. EN-DC, namely LTE-NR DC, the LTE (Long Term Evolution) base station is the primary node and the 5G NG (NewRadio) base station is the secondary node. NE-DC, namely NR-LTE DC, the NR base station is the primary node and the LTE base station is the secondary node. NR-DC, namely NR-NR DC, both the primary node and the secondary node are NR base stations. SgNB represents the secondary node in EN-DC, and SN represents the secondary node in NE-DC or NR-DC.
[0071] Figure 2 A flowchart of a method for processing a conditional primary and secondary cell change failure in some embodiments of the present disclosure is shown. The method is executed by a base station system, for example, by a MN, or by a SN, or by both a MN and a SN. Figure 3-6 The illustrated embodiment is described in detail.
[0072] like Figure 2 As shown, the method of this embodiment includes: steps 210-230.
[0073] In step 210, when the user equipment fails to perform conditional primary and secondary cell change, primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment is received.
[0074] Conditional PScell Change (CPC) failure indication information (CPC failure indicator) is used to indicate that the conditional PScell Change has failed.
[0075] The conditional primary-secondary cell change failure indication information is added to the secondary cell group (SCG) failure information to indicate that the conditional primary-secondary cell change has failed.
[0076] In step 220, the failure type is analyzed based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment.
[0077] The primary and secondary cell group failure information reported by the user equipment includes not only the CPC failure indicator, but also the following information, for example.
[0078] CPC indicator indicates that the current state is a Conditional PScell Change.
[0079] previousPSCellId (source PSCell ID) indicates the source PSCell ID of the last PSCell change.
[0080] failedPSCellId (ID of the PSCell where RLF occurred) indicates the PSCell ID where RLF (Radio Link Failure) was detected or the PSCell ID where PSCell change failed.
[0081] timeConnSource, the time the UE stays in the source PSCell.
[0082] timeConnFailure: the time from the last SN change initialization to the connection failure.
[0083] connectionFailureType, indicating the current failure type, such as a radio link failure or PScell change failure, informs the MN what type of failure the current UE has experienced on the SN side.
[0084] The historical network information of the user equipment includes, for example, the historical network information of the user equipment reported by the user equipment and the historical network information of the user equipment stored by the network side. The historical network information of the user equipment includes, for example, the PCell (Primary Cell) ID, source PSCell ID, and target PSCell ID visited by the user equipment.
[0085] In addition, the historical network information of the user equipment stored on the network side also includes the context information of the user equipment. The context information of the user equipment stored on the network side includes, for example, two thresholds (threshold 1 and threshold 2) set by Conditional PSCell Change and time thresholds (first time threshold and second time threshold) for analyzing the failure type, as well as information such as the candidate target primary and secondary cells configured by the network for the user equipment.
[0086] Threshold 1: used on the base station side, pre-configured by the network or set autonomously by the MN. The MN configures the UE to measure the cell reference signal and report the measurement report. After receiving the measurement report, the MN makes a judgment based on threshold 1. The MN sends an SgNB / SN Addition Request signaling to the SN that meets threshold 1 to start the Conditional PScell change process.
[0087] Threshold 2: used on the UE side, configured by the MN to the UE through an RRC message. The UE continuously monitors the reference signal reception strength of the candidate SNs. When the reception signal strength of a candidate SN is greater than threshold 2, the candidate SN is used as the target SN. The UE disconnects from the source SN and initiates access and synchronization procedures to the target SN.
[0088] The failure types analyzed according to the primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information reported by the user equipment and historical network information include the following situations.
[0089] The network preconfigures a first time threshold for determining Too late PScell Change (i.e., the failure type is failure caused by too late triggering time of primary and secondary cell change). When a PScell Change failure event occurs, if the timeConnSource information shows that the UE's residence time in the source cell (source cell, i.e., the primary and secondary cell of the source secondary node) is greater than the first time threshold, and by judging whether the failedPSCellId is equal to the source ID, it is determined whether the cell where the UE connection failed is the source cell. If it is the source cell, it can be determined that the failure type is Too late PScell Change. Therefore, when the historical network information of the user equipment shows that the user equipment has not switched to the target primary and secondary cell beyond the first time threshold, and the user equipment has a radio link connection failure with the primary and secondary cell of the source secondary node, it is determined that the failure type is failure caused by too late triggering time of the primary and secondary cell change.
[0090] The network preconfigures a second time threshold for determining Too early PScell Change (i.e., the failure type is failure caused by too early triggering time of primary and secondary cell change). When a PScell Change failureevent occurs, if the timeConnFailure information shows that the UE has resided in the current cell for less than the second time threshold, and by judging whether the failedPSCellId is equal to the source ID, it is determined whether the cell where the UE connection failure occurs is the target cell (target cell, i.e., target primary and secondary cell). If it is the target cell, it can be determined that the failure type is Too early PScell Change. Thus, when the historical network information of the user equipment shows that the user equipment has successfully switched to the target primary and secondary cell, and the wireless link connection failure between the user equipment and the target primary and secondary cell occurs when the time is less than the second time threshold, it is determined that the failure type is failure caused by too early triggering time of the primary and secondary cell change.
[0091] By comparing whether failedPSCellId is equal to one of the candidate target cells (i.e., candidate target primary and secondary cells) configured for the UE in the UE context stored on the network side, if it is not, it is determined that the failure type is PScell Change to a wrong cell (i.e., the failure type is the change of the trigger condition primary and secondary cell to the error condition primary and secondary cell). Thus, when the historical network information of the user equipment shows that the primary and secondary cell where the user equipment has a radio link connection failure does not belong to the candidate target primary and secondary cells configured by the network for the user equipment, it is determined that the failure type is the change of the trigger condition primary and secondary cell to the error condition primary and secondary cell.
[0092] At step 230, network configuration parameters are adjusted based on the failure type.
[0093] Adjusting network configuration parameters based on failure type includes the following situations.
[0094] When the failure type is a failure caused by a conditional primary and secondary cell change being triggered too late, the signal quality threshold (ie, threshold 2) for triggering the primary and secondary cell change is lowered.
[0095] When the failure type is a failure caused by the conditional primary and secondary cell change being triggered too early, the signal quality threshold (ie, threshold 2) for triggering the primary and secondary cell change is increased.
[0096] When the failure type is a trigger condition primary and secondary cell that changes to an error condition primary and secondary cell, the candidate target primary and secondary cells are reconfigured.
[0097] The above embodiment receives primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment, analyzes the failure type in combination with the historical network information of the user equipment, and adjusts the network configuration parameters according to the failure type, thereby improving the success rate of conditional primary and secondary cell changes.
[0098] Figure 3 A flow chart of a method for processing a conditional primary and secondary cell change failure in a conditional primary and secondary cell change process initiated by a master node in some embodiments of the present disclosure is shown. In addition, the method is applicable to processing the above three types of failures.
[0099] like Figure 3 As shown, the method of this embodiment includes: steps 31-312.
[0100] Step 31: The MN configures the UE to perform measurement, and the UE measures surrounding cells and reports a measurement report to the MN.
[0101] Step 32: The MN decides whether to use the Conditional PScell Addition procedure for the UE according to the measurement report and the RRM (Radio Resource Management) status.
[0102] Regarding the reliability requirement of the current service of the UE, if the reliability requirement of the current service of the UE is high, the Conditional PScell Addition process is selected to be used; otherwise, the Conditional PScell Addition process may be selected not to be used.
[0103] In addition, based on the measurement report, it can be determined whether there is a candidate SN whose reference signal reception quality meets the condition. If the measurement report reported by the UE indicates that the signal reception strength of the SN is greater than a certain threshold, then the SN is a candidate SN. There can be one or more candidate SNs.
[0104] Step 33: If the MN decides to use the Conditional PScell Addition process, a secondary node addition request SgNB / SN Addition Request is sent to each candidate SN whose reference signal reception quality meets the conditions according to the measurement report.
[0105] There may be one or more candidate SNs that meet the conditions. If there are multiple candidate SNs, such as candidate SN1 and candidate SN2 shown in the figure, SgNB / SN Addition Request may be sent to multiple candidate SNs.
[0106] Step 34: The candidate SN performs access control and determines whether to accept the current secondary node addition request SgNB / SNAddition Request.
[0107] As mentioned above, the candidate SN can decide whether to accept the current secondary node adding request according to its own load, etc.
[0108] Step 35: If the candidate SN accepts the current secondary node addition request SgNB / SN Addition Request, it reserves corresponding resources and feeds back the secondary node addition request response SgNB / SN Addition Request Acknowledge to the MN.
[0109] Step 36: The MN sends the configuration information of Conditional PSCell Addition to the UE through an RRC Reconfiguration (Radio Resource Control Reconfiguration) message, including the Conditional PSCell Addition execution conditions of the candidate SN cell and the configuration parameters of the candidate SN cell.
[0110] Steps 37-38: UE measures candidate SN cells. When a candidate SN cell meets the Conditional PSCellAddition execution condition, the candidate SN cell is used as the target SN cell (i.e., the primary and secondary cells of the target SN), and random access and SN status synchronization are directly initiated to the target SN cell according to the configuration parameters of the target SN cell.
[0111] Step 39: RLF occurs, that is, due to some reasons (for example, the reasons corresponding to the above three types of failures), a conditional primary and secondary cell change failure event occurs.
[0112] Step 310: The UE sends SCG failure information to the MN, in which CPC failure indicator is added to indicate that the conditional primary and secondary cell change fails.
[0113] Step 311: The MN analyzes the failure type according to the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment. For the specific analysis method, refer to the description of the above embodiment.
[0114] Step 312: The MN adjusts the network configuration parameters according to the failure type. For specific adjustment methods, refer to the description of the above embodiment.
[0115] In the above embodiment, the MN receives the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, analyzes the failure type in combination with the historical network information of the user equipment, and adjusts the network configuration parameters according to the failure type, thereby improving the success rate of the conditional primary and secondary cell change.
[0116] Figure 4 A flow chart of a method for processing a conditional primary and secondary cell change failure in a conditional primary and secondary cell change procedure initiated by a secondary node in some embodiments of the present disclosure is shown. In addition, the method is applicable to processing the above three types of failures.
[0117] like Figure 4 As shown, the method of this embodiment includes: steps 41-413.
[0118] Step 41: The source SN configures the UE to perform measurements. The UE measures the surrounding cells and reports the measurement report to the source SN. Based on the measurement report of the UE, the source SN can determine whether there is a candidate SN whose reference signal reception strength meets the conditions. If the measurement report reported by the UE shows that the signal reception strength of the SN is greater than a certain threshold, then the SN can be used as a candidate SN. There can be one or more candidate SNs.
[0119] Step 42: If the source SN decides to use conditional PScell Change for the UE, the candidate SN is sent to the MN via the secondary node change request SgNB / SN Change Required.
[0120] Regarding the reliability requirement of the current service of the UE, if the reliability requirement of the current service of the UE is high, the Conditional PScell Change process is selected to be used; otherwise, the Conditional PScell Change process may be selected not to be used.
[0121] Step 43: The MN sends a secondary node addition request SgNB / SN Addition Request to the candidate SN through the Conditional PScell Addition process.
[0122] Step 44: The candidate SN performs access control and determines whether to accept the current secondary node addition request SgNB / SNAddition Request.
[0123] As mentioned above, the candidate SN can decide whether to accept the current secondary node adding request according to its own load, etc.
[0124] Step 45: If the candidate SN accepts the current secondary node addition request SgNB / SN Addition Request, it reserves corresponding resources and feeds back a secondary node addition request response SgNB / SN Addition Request Acknowledge to the MN.
[0125] Step 46a: The MN returns SgNB / SN change confirm to the source SN and candidate SN to confirm the change of primary and secondary cells.
[0126] Step 46b: The MN sends the configuration information of Conditional PSCell Addition to the UE through an RRC Reconfiguration (Radio Resource Control Reconfiguration) message, including the Conditional PSCell Addition execution conditions of the candidate SN cell and the configuration parameters of the candidate SN cell.
[0127] Steps 47-48: UE measures candidate SN cells. When a candidate SN cell meets the Conditional PSCellAddition execution condition, the candidate SN cell is used as the target SN cell (i.e., the primary and secondary cells of the target SN), and random access and SN status synchronization are directly initiated to the target SN cell according to the configuration parameters of the target SN cell.
[0128] Step 49: RLF occurs, that is, due to some reasons (for example, the reasons corresponding to the above three types of failures), a conditional primary and secondary cell change failure event occurs.
[0129] Step 410: The UE sends SCG failure information to the MN, in which CPC failure indicator is added to indicate that the conditional primary and secondary cell change fails.
[0130] Step 411: The MN analyzes the failure type according to the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment. For the specific analysis method, refer to the above embodiment.
[0131] Step 412: The MN adds the failure type to the secondary cell change failure report and sends it to the source SN. The secondary cell change failure report also adds a CPC failure indicator to indicate that it is a report of conditional primary-secondary cell change failure.
[0132] Step 413: The source SN adjusts the network configuration parameters according to the failure type. For specific adjustment methods, see the above embodiment.
[0133] In the above embodiment, the MN receives the primary and secondary cell group failure information containing the conditional primary and secondary cell change failure indication information sent by the user equipment, analyzes the failure type in combination with the historical network information of the user equipment, and notifies the source SN. The source SN adjusts the network configuration parameters according to the failure type, thereby improving the success rate of the conditional primary and secondary cell change.
[0134] Figure 5 A flow chart of a method for handling a conditional primary and secondary cell change failure in a conditional primary and secondary cell change process initiated by a secondary node in some embodiments of the present disclosure is shown. In addition, the method is applicable to failures caused by too early triggering time of the primary and secondary cell change and failures caused by the triggering condition primary and secondary cell changing to an erroneous condition primary and secondary cell.
[0135] like Figure 5 As shown, the method of this embodiment includes: steps 41-49 and 510-514.
[0136] For details of steps 41-49, please refer to the above.
[0137] Step 510: The UE sends SCG failure information to the MN, in which CPC failure indicator is added to indicate that the conditional primary and secondary cell change fails.
[0138] Step 511: MN receives SCG failure information. If the last secondary node providing service to UE is candidate SN1, MN adds CPC failure indicator to the Radio Link Failure indication signaling and sends it to candidate SN1 to indicate that the radio link connection failure is caused by the change of conditional primary and secondary cells.
[0139] Step 512: The candidate SN1 analyzes the failure type according to the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment. For the specific analysis method, refer to the above embodiment.
[0140] Step 513: the candidate SN1 adds the failure type to the secondary cell change failure report and sends it to the source SN. The secondary cell change failure report also adds a CPC failure indicator to indicate that it is a report of conditional primary and secondary cell change failure.
[0141] When there is no X2 or Xn interface interconnection between the candidate SN1 and the source SN, the candidate SN1 sends the above information to the MN, and the MN then forwards the above information to the source SN.
[0142] Step 514: The source SN adjusts the network configuration parameters according to the failure type. For specific adjustment methods, see the above embodiment.
[0143] In the above embodiment, when the secondary node of the last serving UE is SN1, MN receives the primary and secondary cell group failure information containing the conditional primary and secondary cell change failure indication information sent by the user equipment and forwards it to SN1. SN1 analyzes the failure type in combination with the historical network information of the user equipment and notifies the source SN. The source SN adjusts the network configuration parameters according to the failure type, thereby improving the success rate of the conditional primary and secondary cell change.
[0144] Figure 6 A flow chart of a method for handling a conditional primary and secondary cell change failure in a conditional primary and secondary cell change procedure initiated by a secondary node in some embodiments of the present disclosure is shown. In addition, the method is applicable to handling a failure caused by a primary and secondary cell change being triggered too late.
[0145] like Figure 6 As shown, the method of this embodiment includes: steps 41-49 and 610-614.
[0146] For details of steps 41-49, please refer to the above.
[0147] Step 610: The UE sends SCG failure information to the MN, in which CPC failure indicator is added to indicate that the conditional primary and secondary cell change fails.
[0148] Step 611: MN receives SCG failure information. When the secondary node of the previous service UE is the source SN, MN adds CPC failure indicator to the Radio Link Failure indication signaling and sends it to the source SN to indicate that the radio link connection failure is caused by the change of conditional primary and secondary cells.
[0149] Step 612: The source SN analyzes the failure type according to the historical network information of the user equipment. For the specific analysis method, refer to the above embodiment.
[0150] Step 613: The source SN adjusts the network configuration parameters according to the failure type. For specific adjustment methods, see the above embodiment.
[0151] In the above embodiment, when the secondary node of the last service UE is the source SN, the MN receives the primary and secondary cell group failure information containing the conditional primary and secondary cell change failure indication information sent by the user equipment and forwards it to the source SN. The source SN analyzes the failure type in combination with the historical network information of the user equipment, and adjusts the network configuration parameters according to the failure type, thereby improving the success rate of the conditional primary and secondary cell change.
[0152] Figure 7 A schematic diagram of a system for processing a conditional primary and secondary cell change failure according to some embodiments of the present disclosure is shown.
[0153] like Figure 7 As shown, the processing system 700 of this embodiment includes a user equipment 710 and a base station system 720 .
[0154] The user equipment 710 is configured to send secondary cell group failure information to the master node in the base station system 710 when the conditional primary and secondary cell change fails, wherein the conditional primary and secondary cell change failure indication information is added.
[0155] The base station system 720 is configured to execute the method for processing the conditional primary and secondary cell change failure of each embodiment.
[0156] In some embodiments, the conditional primary and secondary cell change process initiated by the master node of the base station system:
[0157] The master node 721 of the base station system 720 is configured as follows:
[0158] When the user equipment fails to perform a conditional primary and secondary cell change, receiving secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment;
[0159] Analyze the failure type based on the secondary cell group failure information including the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment;
[0160] Adjust network configuration parameters based on the type of failure.
[0161] In some embodiments, the conditional primary and secondary cell change process initiated by the source secondary node of the base station system:
[0162] The master node 721 of the base station system 720 is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment; analyze the failure type based on the secondary cell group failure information including the conditional primary and secondary cell change failure indication information in combination with the historical network information of the user equipment, and send it to the source secondary node;
[0163] The source secondary node 722 of the base station system 720 is configured to adjust network configuration parameters according to the failure type.
[0164] In some embodiments, the conditional primary and secondary cell change process initiated by the source secondary node of the base station system:
[0165] The master node 721 of the base station system 720 is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and send it to the candidate secondary node;
[0166] The candidate secondary node 723 of the base station system is configured to: analyze the failure type based on the secondary cell group failure information including the conditional primary and secondary cell change failure indication information in combination with the historical network information of the user equipment, and directly send it to the source secondary node or forward it to the source secondary node through the primary node;
[0167] The source secondary node 722 of the base station system is configured to adjust the network configuration parameters according to the failure type.
[0168] In some embodiments, for the conditional primary and secondary cell change process initiated by the source secondary node:
[0169] The master node 721 of the base station system 720 is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and send it to the source secondary node;
[0170] The source secondary node 722 of the base station system 720 is configured to: analyze the failure type based on the secondary cell group failure information including the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment; and adjust the network configuration parameters according to the failure type.
[0171] The conditional primary and secondary cell change failure indication information is added to the secondary cell group failure information to indicate that the conditional primary and secondary cell change has failed.
[0172] The failure type is added to the secondary cell change failure report, and conditional primary and secondary cell change failure indication information is also added to the secondary cell change failure report to indicate that it is a report of conditional primary and secondary cell change failure.
[0173] The primary node adds the conditional primary and secondary cell change failure indication information to the radio link connection failure indication signaling and sends it to the secondary node (such as a candidate secondary node or a source secondary node) that provided services to the user last time to indicate that the radio link connection failure was caused by the conditional primary and secondary cell change.
[0174] Figure 8 A schematic diagram showing a base station system according to some embodiments of the present disclosure.
[0175] like Figure 8 As shown, the base station system 720 of this embodiment includes: a memory 821; and a processor 822 coupled to the memory, and the processor 822 is configured to execute the processing method of the conditional primary and secondary cell change failure of the above embodiments based on the instructions stored in the memory.
[0176] The memory 821 may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs.
[0177] Some embodiments of the present disclosure provide a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for processing a conditional primary and secondary cell change failure.
[0178] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more non-transient computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer program code.
[0179] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0180] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.
[0181] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.
[0182] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.
Claims
1. A method for processing a conditional primary and secondary cell change failure, characterized in that: include: When the user equipment fails to perform conditional primary and secondary cell change, receiving primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment; Analyzing the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment includes: According to the time that the user equipment stays in the primary and secondary cells of the source secondary node and the identifier of the primary and secondary cell where the radio link connection failure occurs in the historical network information, when the time that the user equipment stays in the primary and secondary cells of the source secondary node exceeds the first time threshold and is not switched to any candidate target primary and secondary cell, and the user equipment fails to connect to the primary and secondary cells of the source secondary node via a radio link, it is determined that the failure type is a failure caused by a conditional primary and secondary cell change trigger time being too late; or, According to the time elapsed from the last secondary node change initialization to the connection failure and the identifier of the primary and secondary cells where the radio link connection failure occurs in the historical network information, when the user equipment successfully switches to the target primary and secondary cells, and the time elapsed from the last secondary node change initialization to the connection failure is less than the second time threshold, the user equipment and the target primary and secondary cells have a radio link connection failure, and it is determined that the failure type is a failure caused by the conditional primary and secondary cell change trigger time being too early; Adjusting network configuration parameters according to the failure type includes: When the failure type is caused by the primary and secondary cell change being triggered too late, the signal quality threshold for triggering the primary and secondary cell change is lowered, or, When the failure type is caused by the primary and secondary cell change being triggered too early, the signal quality threshold for triggering the primary and secondary cell change is increased.
2. The method according to claim 1, characterized in that include: Conditional primary and secondary cell change process initiated by the master node: When the user equipment fails to perform conditional primary and secondary cell change, the master node receives primary and secondary cell group failure information including conditional primary and secondary cell change failure indication information sent by the user equipment; The master node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment; The master node adjusts the network configuration parameters according to the failure type.
3. The method according to claim 1, characterized in that include: Conditional primary and secondary cell change process initiated by the source secondary node: When the conditional primary and secondary cell change of the user equipment fails, the primary node receives the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment; the primary node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment, and sends the failure type to the source secondary node; The source secondary node adjusts the network configuration parameters according to the failure type.
4. The method according to claim 1, characterized in that include: Conditional primary and secondary cell change process initiated by the source secondary node: When the conditional primary and secondary cell change of the user equipment fails, the primary node receives the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and sends it to the candidate secondary node; The candidate secondary node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment, and directly sends the information to the source secondary node or forwards the information to the source secondary node through the primary node; The source secondary node adjusts the network configuration parameters according to the failure type.
5. The method according to claim 1, characterized in that include: Conditional primary and secondary cell change process initiated by the source secondary node: When the conditional primary and secondary cell change of the user equipment fails, the primary node receives the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and sends it to the source secondary node; The source secondary node analyzes the failure type based on the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment; The source secondary node adjusts the network configuration parameters according to the failure type.
6. According to the method according to any one of claims 1 to 5, analyzing the failure type further comprises: According to the identification of the primary and secondary cells where the wireless link connection failure occurs in the historical network information and the candidate target primary and secondary cells configured for the user equipment, when the primary and secondary cells where the wireless link connection failure occurs in the user equipment do not belong to the candidate target primary and secondary cells configured by the network for the user equipment, it is determined that the failure type is the trigger condition primary and secondary cell changed to the error condition primary and secondary cell.
7. The method according to any one of claims 1 to 5, wherein adjusting the network configuration parameters according to the failure type further comprises: When the failure type is a trigger condition primary and secondary cell that changes to an error condition primary and secondary cell, the candidate target primary and secondary cells are reconfigured.
8. The method according to any one of claims 3 to 4, characterized in that: The failure type is added to the secondary cell change failure report, and conditional primary and secondary cell change failure indication information is also added to the secondary cell change failure report to indicate that it is a report of conditional primary and secondary cell change failure.
9. The method according to claim 4 or 5, characterized in that: The primary node adds the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information to the radio link connection failure indication signaling and sends it to the secondary node that provided services to the user last time, to indicate that the radio link connection failure was caused by the conditional primary and secondary cell change.
10. A base station system, comprising: Memory; and a processor coupled to the memory, wherein the processor is configured to execute the method for processing a conditional primary and secondary cell change failure according to any one of claims 1 to 9 based on instructions stored in the memory.
11. A system for processing a conditional primary and secondary cell change failure, comprising: The base station system according to claim 10, as well as The user equipment is configured to send secondary cell group failure information to a primary node in a base station system when a conditional primary and secondary cell change fails, wherein conditional primary and secondary cell change failure indication information is added.
12. The processing system according to claim 11, characterized in that Conditional primary and secondary cell change process initiated by the master node of the base station system: The master node of the base station system is configured as: When the user equipment fails to perform a conditional primary and secondary cell change, receiving conditional primary and secondary cell change failure indication information sent by the user equipment; Analyzing the failure type based on the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment; A network configuration parameter is adjusted based on the failure type.
13. The processing system according to claim 11, characterized in that Conditional primary and secondary cell change process initiated by the source secondary node of the base station system: The master node of the base station system is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment; analyze the failure type based on the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment, and send the failure type to the source secondary node; The source secondary node of the base station system is configured to adjust network configuration parameters according to the failure type.
14. The processing system according to claim 11, characterized in that Conditional primary and secondary cell change process initiated by the source secondary node of the base station system: The master node of the base station system is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and send it to the candidate secondary node; The candidate secondary node of the base station system is configured to: analyze the failure type based on the conditional primary and secondary cell change failure indication information and the historical network information of the user equipment, and directly send the information to the source secondary node or forward the information to the source secondary node through the primary node; The source secondary node of the base station system is configured to adjust network configuration parameters according to the failure type.
15. The processing system according to claim 11, characterized in that Conditional primary and secondary cell change process initiated by the source secondary node: The master node of the base station system is configured to: when the conditional primary and secondary cell change of the user equipment fails, receive the primary and secondary cell group failure information including the conditional primary and secondary cell change failure indication information sent by the user equipment, and send it to the source secondary node; The source secondary node of the base station system is configured to: analyze the failure type based on the conditional primary and secondary cell change failure indication information and in combination with the historical network information of the user equipment; and adjust the network configuration parameters according to the failure type.
16. A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for processing a conditional primary and secondary cell change failure according to any one of claims 1 to 9.