Dual-connection auxiliary node recovery method and device

Abstract

The present invention provides a dual-connection auxiliary node recovery method and device, which belongs to the field of wireless communication technology. The dual-connection auxiliary node recovery method includes: the source main base station sends a first message to the source auxiliary base station, and the first message requests to obtain the terminal information saved by the source auxiliary base station; or, the first message requests the source auxiliary base station to send the saved terminal information to the new main base station and / or the new auxiliary base station; and / or, the first message carries the identification of the new main base station and / or the new auxiliary base station. The technical solution of the present invention can obtain the UE information saved in the source auxiliary base station as soon as possible, reduce the signaling load and delay of the interaction between the UE and the new auxiliary base station, so that the UE can obtain the desired slice service as soon as possible.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a dual-connection auxiliary node recovery method and device. Background Art

[0002] In a dual-connection scenario, the primary base station and the secondary base station can support different slices, and both the primary base station and the secondary base station can store UE (User Equipment) information.

[0003] In the prior art, the UE information stored in the secondary base station is not sent to the new base station during the RNA (RAN Notification Area) update process or the RRC (Radio Resource Control) recovery process, and there is no process for requesting UE information between the source primary base station and the source secondary base station.

[0004] Assume that the source primary base station and the target primary base station support slice 1, the source secondary base station and the target secondary base station support slice 2, and the UE wants to obtain services of both slice 1 and slice 2. In the prior art, the source primary base station will first release the source secondary base station, and then the new primary base station will add a new secondary base station, and then provide the UE with services of slice 2, which will cause additional delays and signaling overhead, and the UE information stored in the source secondary base station will not play a role. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a dual-connection auxiliary node recovery method and device, which can obtain the UE information stored in the source auxiliary base station as soon as possible, reduce the signaling load and delay of the interaction between the UE and the new auxiliary base station, so that the UE can obtain the desired slice service as soon as possible.

[0006] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0007] On the one hand, a dual-connection secondary node recovery method is provided, comprising:

[0008] The source main base station sends a first message to the source secondary base station, and the first message requests to obtain the terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to the new main base station and / or the new secondary base station; and / or, the first message carries the identifier of the new main base station and / or the new secondary base station, and the terminal information is requested to be obtained by the new secondary base station.

[0009] In some embodiments, the method further comprises:

[0010] The source primary base station verifies the new primary base station and / or the new secondary base station.

[0011] In some embodiments, the method further comprises:

[0012] The source primary base station receives a second message from the new secondary base station, where the second message requests to obtain the terminal information stored by the source secondary base station.

[0013] In some embodiments, the method further comprises:

[0014] The source primary base station receives the terminal information sent by the source secondary base station;

[0015] The source primary base station sends the terminal information to the new primary base station and / or the new secondary base station.

[0016] In some embodiments, the method further comprises:

[0017] The source primary base station receives a third message sent by the new primary base station; the third message is used to indicate the release of the stored terminal information;

[0018] The source primary base station sends a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0019] An embodiment of the present invention further provides a dual-connection secondary node recovery method, the method comprising:

[0020] The source secondary base station receives a first message sent by the source primary base station, where the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new primary base station and / or a new secondary base station of the terminal; and / or, the first message carries an identifier of the new primary base station and / or the new secondary base station;

[0021] The source secondary base station sends the terminal information to the source primary base station and / or the new primary base station and / or the new secondary base station;

[0022] The terminal information is requested to be obtained by the new secondary base station.

[0023] In some embodiments, the method further comprises:

[0024] The source secondary base station receives a fourth message sent by the new primary base station and / or a fifth message sent by the new secondary base station, where the fourth message and the fifth message request to obtain the terminal information.

[0025] In some embodiments, the method further comprises:

[0026] The source secondary base station receives a third message sent by the source primary base station and / or the new primary base station and / or the new secondary base station;

[0027] The source secondary base station releases the stored terminal information.

[0028] An embodiment of the present invention further provides a dual-connection secondary node recovery method, the method comprising:

[0029] The new primary base station receives terminal information sent by the source primary base station and / or the source secondary base station, where the terminal information is terminal information stored by the source secondary base station and is requested to be obtained by the new secondary base station.

[0030] In some embodiments, the method further comprises:

[0031] The new primary base station sends the terminal information to the new secondary base station.

[0032] In some embodiments, the method further comprises:

[0033] The new primary base station sends a sixth message to the source primary base station, where the sixth message requests the source primary base station to verify the new secondary base station.

[0034] In some embodiments, the method further comprises:

[0035] The new primary base station sends the identifiers of the source primary base station and / or the source secondary base station to the new secondary base station.

[0036] In some embodiments, the method further comprises:

[0037] The new primary base station sets a first timer, and if the terminal information has not been received after the first timer times out, sends a fourth message to the source secondary base station, where the fourth message is used to request to obtain the terminal information.

[0038] In some embodiments, the method further comprises:

[0039] The new primary base station sends a third message to the source primary base station and / or the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0040] An embodiment of the present invention further provides a dual-connection secondary node recovery method, the method comprising:

[0041] The new secondary base station receives the terminal information sent by the source primary base station and / or the source secondary base station and / or the new primary base station, where the terminal information is the terminal information stored by the source secondary base station and is requested to be obtained by the new secondary base station.

[0042] In some embodiments, the method further comprises:

[0043] Receiving, by the new secondary base station, an identifier of the source primary base station and / or the source secondary base station sent by the new primary base station;

[0044] The new secondary base station sends a second message to the source primary base station and / or sends a fifth message to the source secondary base station, where the second message and the fifth message are used to request to obtain the terminal information.

[0045] In some embodiments, the method further comprises:

[0046] The new secondary base station sends a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0047] In some embodiments, the method further comprises:

[0048] The new secondary base station sets a second timer, and if the terminal information is not received after the second timer times out, sends a fifth message to the source secondary base station and / or sends a second message to the source primary base station, wherein the fifth message and the second message request to obtain the terminal information.

[0049] The embodiment of the present invention further provides a dual-connection secondary node recovery device, which is applied to a source primary base station. The device includes a transceiver and a processor.

[0050] The transceiver is used to send a first message to the source secondary base station, wherein the first message requests to obtain the terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to the new primary base station and / or the new secondary base station; and / or, the first message carries the identifier of the new primary base station and / or the new secondary base station, and the terminal information is requested to be obtained by the new secondary base station.

[0051] In some embodiments, the processor is configured to verify the new primary base station and / or the new secondary base station.

[0052] In some embodiments, the transceiver is further configured to receive a second message from the new secondary base station, where the second message requests to obtain the terminal information stored by the source secondary base station.

[0053] In some embodiments, the transceiver is further configured to receive the terminal information sent by the source secondary base station; and send the terminal information to the new primary base station and / or the new secondary base station.

[0054] In some embodiments, the transceiver is further used to receive a third message sent by the new primary base station; the third message is used to instruct the release of the stored terminal information; and send the third message to the source secondary base station to instruct the source secondary base station to release the stored terminal information.

[0055] The embodiment of the present invention further provides a dual-connection secondary node recovery device, which is applied to a source secondary base station. The device includes a transceiver and a processor.

[0056] The transceiver is used to receive a first message sent by a source main base station, wherein the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new main base station and / or a new secondary base station of the terminal; and / or, the first message carries an identifier of the new main base station and / or the new secondary base station; and sends the terminal information to the source main base station and / or the new main base station and / or the new secondary base station, wherein the terminal information is requested to be obtained by the new secondary base station.

[0057] In some embodiments, the transceiver is further configured to receive a fourth message sent by the new primary base station and / or a fifth message sent by the new secondary base station, wherein the fourth message and the fifth message request to obtain the terminal information.

[0058] In some embodiments, the transceiver is further configured to receive a third message sent by the source primary base station and / or the new primary base station and / or the new secondary base station;

[0059] The processor is used for releasing the stored terminal information.

[0060] The embodiment of the present invention further provides a dual-connection secondary node recovery device, which is applied to a new primary base station. The device includes a transceiver and a processor.

[0061] The transceiver is used to receive terminal information sent by a source primary base station and / or a source secondary base station, where the terminal information is terminal information stored by the source secondary base station and is requested to be obtained by the new secondary base station.

[0062] In some embodiments, the transceiver is used to send the terminal information to the new secondary base station.

[0063] In some embodiments, the transceiver is used to send a sixth message to the source primary base station, where the sixth message requests the source primary base station to verify the new secondary base station.

[0064] In some embodiments, the transceiver is used to send the identifier of the source primary base station and / or the source secondary base station to the new secondary base station.

[0065] In some embodiments, the transceiver is used to set a first timer, and if the terminal information is not received after the first timer times out, send a fourth message to the source secondary base station, where the fourth message is used to request to obtain the terminal information.

[0066] In some embodiments, the transceiver is used to send a third message to the source primary base station and / or the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0067] The embodiment of the present invention further provides a dual-connection secondary node recovery device, which is applied to a new secondary base station. The device includes a transceiver and a processor.

[0068] The transceiver is used to receive terminal information sent by the source primary base station and / or the source secondary base station and / or the new primary base station, where the terminal information is the terminal information stored by the source secondary base station and is requested to be obtained by the new secondary base station.

[0069] In some embodiments, the transceiver is used to receive the identifier of the source main base station and / or the source auxiliary base station sent by the new main base station; send a second message to the source main base station and / or send a fifth message to the source auxiliary base station, and the second message and the fifth message are used to request to obtain the terminal information.

[0070] In some embodiments, the transceiver is used to send a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0071] In some embodiments, the transceiver is used to set a second timer. If the terminal information is not received after the second timer expires, a fifth message is sent to the source auxiliary base station and / or a second message is sent to the source main base station. The fifth message and the second message request to obtain the terminal information.

[0072] An embodiment of the present invention also provides a dual-connection auxiliary node recovery device, including a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the program, the dual-connection auxiliary node recovery method described above is implemented.

[0073] In some embodiments, the dual-connection secondary node recovery device is applied to the source primary base station.

[0074] The processor is used to send a first message to the source secondary base station, wherein the first message requests to obtain the terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to the new primary base station and / or the new secondary base station; and / or, the first message carries the identifier of the new primary base station and / or the new secondary base station, and the terminal information is requested to be obtained by the new secondary base station.

[0075] In some embodiments, the processor is configured to verify the new primary base station and / or the new secondary base station.

[0076] In some embodiments, the processor is configured to receive a second message from the new secondary base station, where the second message requests to obtain the terminal information stored by the source secondary base station.

[0077] In some embodiments, the processor is configured to receive the terminal information sent by the source secondary base station; and send the terminal information to the new primary base station and / or the new secondary base station.

[0078] In some embodiments, the processor is configured to receive a third message sent by the new primary base station; the third message is used to instruct the release of the stored terminal information; and the third message is sent to the source secondary base station to instruct the source secondary base station to release the stored terminal information.

[0079] In some embodiments, the dual-connection secondary node recovery device is applied to a source secondary base station.

[0080] The processor is used to receive a first message sent by a source main base station, wherein the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new main base station and / or a new secondary base station of the terminal; and / or, the first message carries an identifier of the new main base station and / or the new secondary base station; and send the terminal information to the source main base station and / or the new main base station and / or the new secondary base station, wherein the terminal information is requested to be obtained by the new secondary base station.

[0081] In some embodiments, the processor is configured to receive a fourth message sent by the new primary base station and / or a fifth message sent by the new secondary base station, where the fourth message and the fifth message request to obtain the terminal information.

[0082] In some embodiments, the processor is configured to receive a third message sent by the source primary base station and / or the new primary base station and / or the new secondary base station; and release the stored terminal information.

[0083] In some embodiments, the dual-connection secondary node recovery device is applied to the new primary base station, and the processor is used to receive terminal information sent by the source primary base station and / or the source secondary base station, the terminal information is the terminal information saved by the source secondary base station, and the terminal information is requested by the new secondary base station.

[0084] In some embodiments, the processor is configured to send the terminal information to a new secondary base station.

[0085] In some embodiments, the processor is configured to send a sixth message to the source primary base station, wherein the sixth message requests the source primary base station to verify the new secondary base station.

[0086] In some embodiments, the processor is configured to send an identifier of the source primary base station and / or the source secondary base station to the new secondary base station.

[0087] In some embodiments, the processor is configured to set a first timer, and if the terminal information has not been received after the first timer times out, send a fourth message to the source secondary base station, where the fourth message is used to request to obtain the terminal information.

[0088] In some embodiments, the processor is configured to send a third message to the source primary base station and / or the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0089] In some embodiments, the dual-connection secondary node recovery device is applied to the new secondary base station, and the processor is used to receive terminal information sent by the source main base station and / or the source secondary base station and / or the new main base station, the terminal information is the terminal information saved by the source secondary base station, and the terminal information is requested by the new secondary base station.

[0090] In some embodiments, the processor is used to receive the identifier of the source main base station and / or the source secondary base station sent by the new main base station; send a second message to the source main base station and / or send a fifth message to the source secondary base station, and the second message and the fifth message are used to request to obtain the terminal information.

[0091] In some embodiments, the processor is configured to send a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0092] In some embodiments, the processor is used to set a second timer. If the terminal information is not received after the second timer expires, a fifth message is sent to the source secondary base station and / or a second message is sent to the source main base station. The fifth message and the second message request to obtain the terminal information.

[0093] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the dual-connection secondary node recovery method described above are implemented.

[0094] The embodiments of the present invention have the following beneficial effects:

[0095] In the above scheme, an interaction process between base stations is introduced so that the new secondary base station can obtain the UE information stored in the source secondary base station as soon as possible through the source main base station or the new main base station or directly communicate with the source secondary base station, thereby reducing the signaling load and delay of the interaction between the UE and the new secondary base station, so that the UE can obtain the desired slice service as soon as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] Figure 1 Schematic diagram of RNA renewal process;

[0097] Figure 2 is a schematic diagram of the RRC recovery process;

[0098] Figure 3 Schematic diagram of dual connection scenario and slicing scenario;

[0099] Figure 4-Figure 13 A schematic diagram of a process of a dual-connection auxiliary node recovery method according to an embodiment of the present invention;

[0100] Fig.14This is a schematic diagram of the structure of a dual-connection auxiliary node recovery device according to an embodiment of the present invention;

[0101] Fig.15 The figure is a schematic diagram of the composition of a dual-connection auxiliary node recovery device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0102] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0103] When the UE enters the RRC_INACTIVE (Radio Resource Control_Inactive) state, the source base station will save the UE context and configure RNA (Notification Area of ​​Radio Access Network) for the UE. When the RRC_INACTIVE UE moves out of RNA or periodically initiates RNA update (see the flowchart for details) Figure 1 ), or when conducting MO traffic (terminal triggered services) or responding to paging, the RRC (Radio Resource Control) recovery process will be initiated (see the flowchart for details) Figure 2 ). If the UE is not within the coverage of the source base station, the new base station will request the UE context from the source base station, and the source base station will send the stored UE information to the new base station.

[0104] Figure 1In the example, gNB is the base station, Last Serving gNB is the source serving base station, AMF is the access and mobility management function, and the RNA update process includes the following steps: Step 1, UE sends RRC Resume Request RNA Update to gNB; Step 2, gNB sends RETRIEVE UE CONTEXT REQUEST to Last Serving gNB; Step 3, Last Serving gNB sends RETRIEVE UE CONTEXTRESPONSE to gNB; Step 4, gNB sets UE to inactive state; Step 5, gNB sends Xn-U ADDRESS INDICATION to Last Serving gNB; Step 6, Last Serving gNB sends PATH SWITCH REQUEST to AMF; Step 7, AMF sends PATH SWITCHREQUEST to Last Serving gNB RESPONSE (path switch request response); Step 8. The gNB sends an RRC Release Suspend Indication (RRC release suspension indication) to the UE; Step 9. The gNB sends a UE CONTEXT RELEASE (terminal context release) message to the Last Serving gNB.

[0105] Figure 2In the example, gNB is a base station, Last Serving gNB is a source serving base station, and AMF is an access and mobility management function, which includes the following steps: Step 1, UE sends RRC Resume Request to gNB; Step 2, gNB sends RETRIEVE UE CONTEXT REQUEST to Last Serving gNB; Step 3, Last Serving gNB sends RETRIEVE UE CONTEXT RESPONSE to gNB; Step 4, gNB sends RRC Resume to UE, and UE is in RRC connected state; Step 5, UE sends RRC ResumeComplete to gNB; Step 6, gNB sends Xn-U ADDRESS INDICATION to Last Serving gNB; Step 7, Last Serving gNB sends PATH SWITCH REQUEST to AMF; Step 8, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 9, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 10, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 11, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 12, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 13, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 14, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 15, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 16, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 17, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 18, AMF sends PATH SWITCH REQUEST to Last Serving gNB; Step 19, AMF sends PATH SWITCH REQUEST to Last Serving gNB. The gNB sends a PATH SWITCH REQUEST RESPONSE. Step 9: The gNB sends a UE CONTEXT RELEASE message to the Last Serving gNB.

[0106] In the dual connection scenario, the primary base station and the secondary base station can support different slices, and both the primary base station and the secondary base station can store UE information.

[0107] In the prior art, the UE information stored in the secondary base station is not sent to the new base station during the RNA update process or the RRC recovery process, and there is no process of requesting UE information between the source primary base station and the source secondary base station.

[0108] Assume that the source primary base station and the target primary base station support slice 1, the source secondary base station and the target secondary base station support slice 2, and the UE wants to obtain services of slice 1 and slice 2 at the same time. In the prior art, the source primary base station will first release the source secondary base station, and then the new primary base station will add a new secondary base station, and then provide the UE with services of slice 2, which will cause additional delays and signaling overhead. In addition, the UE information stored in the source secondary base station does not play a role.

[0109] An embodiment of the present invention provides a dual-connection auxiliary node recovery method and device, which can obtain UE information stored in the source auxiliary base station as soon as possible, reduce the signaling load and delay of the interaction between the UE and the new auxiliary base station, so that the UE can obtain the desired slice service as soon as possible.

[0110] An embodiment of the present invention provides a dual-connection secondary node recovery method, which is performed by a source primary base station, and the method includes:

[0111] The source main base station sends a first message to the source secondary base station, and the first message requests to obtain the terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to the new main base station and / or the new secondary base station; and / or, the first message carries the identifier of the new main base station and / or the new secondary base station, and the terminal information is requested to be obtained by the new secondary base station.

[0112] In some embodiments, the method further comprises:

[0113] The source primary base station verifies the new primary base station and / or the new secondary base station.

[0114] In some embodiments, the method further comprises:

[0115] The source primary base station receives a second message from the new secondary base station, where the second message requests to obtain the terminal information stored by the source secondary base station.

[0116] In some embodiments, the method further comprises:

[0117] The source primary base station receives the terminal information sent by the source secondary base station;

[0118] The source primary base station sends the terminal information to the new primary base station and / or the new secondary base station.

[0119] In some embodiments, the method further comprises:

[0120] The source primary base station receives a third message sent by the new primary base station; the third message is used to indicate the release of the stored terminal information;

[0121] The source primary base station sends a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0122] An embodiment of the present invention further provides a dual-connection secondary node recovery method, which is performed by a source secondary base station, and the method includes:

[0123] The source secondary base station receives a first message sent by the source primary base station, where the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new primary base station and / or a new secondary base station of the terminal; and / or, the first message carries an identifier of the new primary base station and / or the new secondary base station;

[0124] The source secondary base station sends the terminal information to the source primary base station and / or the new primary base station and / or the new secondary base station;

[0125] The terminal information is requested to be obtained by the new secondary base station.

[0126] In some embodiments, the method further comprises:

[0127] The source secondary base station receives a fourth message sent by the new primary base station and / or a fifth message sent by the new secondary base station, where the fourth message and the fifth message request to obtain the terminal information.

[0128] In some embodiments, the method further comprises:

[0129] The source secondary base station receives a third message sent by the source primary base station and / or the new primary base station and / or the new secondary base station;

[0130] The source secondary base station releases the stored terminal information.

[0131] The embodiment of the present invention further provides a dual-connection secondary node recovery method, which is performed by a new primary base station, and the method includes:

[0132] The new primary base station receives terminal information sent by the source primary base station and / or the source secondary base station, where the terminal information is terminal information stored by the source secondary base station and is requested to be obtained by the new secondary base station.

[0133] In some embodiments, the method further comprises:

[0134] The new primary base station sends the terminal information to the new secondary base station.

[0135] In some embodiments, the method further comprises:

[0136] The new primary base station sends a sixth message to the source primary base station, where the sixth message requests the source primary base station to verify the new secondary base station.

[0137] In some embodiments, the method further comprises:

[0138] The new primary base station sends the identifiers of the source primary base station and / or the source secondary base station to the new secondary base station.

[0139] In some embodiments, the method further comprises:

[0140] The new primary base station sets a first timer, and if the terminal information has not been received after the first timer times out, sends a fourth message to the source secondary base station, where the fourth message is used to request to obtain the terminal information.

[0141] In some embodiments, the method further comprises:

[0142] The new primary base station sends a third message to the source primary base station and / or the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0143] The embodiment of the present invention further provides a dual-connection secondary node recovery method, which is performed by a new secondary base station, and the method includes:

[0144] The new secondary base station receives the terminal information sent by the source primary base station and / or the source secondary base station and / or the new primary base station, where the terminal information is the terminal information stored by the source secondary base station and is requested to be obtained by the new secondary base station.

[0145] In some embodiments, the method further comprises:

[0146] Receiving, by the new secondary base station, an identifier of the source primary base station and / or the source secondary base station sent by the new primary base station;

[0147] The new secondary base station sends a second message to the source primary base station and / or sends a fifth message to the source secondary base station, where the second message and the fifth message are used to request to obtain the terminal information.

[0148] In some embodiments, the method further comprises:

[0149] The new secondary base station sends a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0150] In some embodiments, the method further comprises:

[0151] The new secondary base station sets a second timer, and if the terminal information is not received after the second timer times out, sends a fifth message to the source secondary base station and / or sends a second message to the source primary base station, wherein the fifth message and the second message request to obtain the terminal information.

[0152] Among them, the first message is sent from the source main base station to the source secondary base station, requesting terminal information; the second message is sent from the new secondary base station to the source main base station, requesting terminal information; the third message is a message for releasing terminal information; the fourth message is sent from the new main base station to the source secondary base station, requesting terminal information; the fifth message is sent from the new secondary base station to the source secondary base station, requesting terminal information; the sixth message is sent from the new main base station to the source main base station, requesting terminal information.

[0153] The terminal information may include slice information, but is not limited to slice information.

[0154] In this embodiment, an interaction process between base stations is introduced so that the new secondary base station can obtain the UE information stored in the source secondary base station as quickly as possible by means of relaying through the source main base station or the new main base station or directly communicating with the source secondary base station, thereby reducing the signaling load and delay of the interaction between the UE and the new secondary base station, so that the UE can obtain the desired slice service as soon as possible.

[0155] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The technical solution of the present invention is applied to Figure 3 The dual connection scenario and slicing scenario are shown.

[0156] In a specific embodiment, the source main base station requests UE information from the source secondary base station, and the source secondary base station sends the UE information to the source main base station through the Xn interface (which can be in an RRC Container, or in an existing message or a new message between base stations, which is not limited in this embodiment), and the source main base station sends the UE information stored in the source secondary base station to the new main base station, and the new main base station sends the UE information of the source secondary base station to the new secondary base station.

[0157] like Figure 4 As shown, this embodiment specifically includes the following steps:

[0158] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0159] Step 2: The new primary base station sends a Retrive UE context Request message to the source primary base station to request the UE context;

[0160] Step 2a: The source primary base station requests the source secondary base station for UE information stored in the source secondary base station;

[0161] Step 2b: The source secondary base station sends the UE information stored by itself to the source primary base station;

[0162] Step 3: The source primary base station carries the UE information of the source secondary base station in a Retrive UE context Response message;

[0163] Step 4a: The new primary base station carries the UE information of the source secondary base station in an SN Addition Request message to the new secondary base station;

[0164] Step 4b: The new secondary base station sends an SN Addition Request ACK (sequence number addition request confirmation) message to the new primary base station;

[0165] Step 5: The new primary base station sends an RRC Resume message to the UE;

[0166] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0167] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0168] Step 9a: the source primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0169] In another specific embodiment, the source primary base station verifies the identity of the new secondary base station and then notifies the source secondary base station. The new primary base station notifies the new secondary base station of the identity information of the source secondary base station. The source secondary base station directly sends its stored UE information to the new secondary base station.

[0170] like Figure 5 As shown, this embodiment specifically includes the following steps:

[0171] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0172] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0173] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0174] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station, which carries the information of the new secondary base station so that the source primary base station can verify the identity of the new secondary base station;

[0175] Step 3a: After verification, the source primary base station sends the identity information of the new secondary base station (such as base station identification, etc.) to the source secondary base station, and requests the source secondary base station to send the stored UE information to the new secondary base station;

[0176] Step 4: The source primary base station carries the identity information of the source secondary base station (such as base station identifier, etc.) in the Retrive UE context Response message;

[0177] Step 4a: The new primary base station sends the identity information of the source secondary base station (such as base station identification, etc.) to the new secondary base station;

[0178] Step 3b: The source secondary base station sends the stored UE information to the new secondary base station;

[0179] Step 5: The new primary base station sends an RRC Resume message to the UE;

[0180] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0181] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0182] Step 9a: the new secondary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0183] Step 9b: the source primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0184] In this embodiment, it is worth noting that only one of step 9a and step 9b can be executed, and the order of step 3b and step 4 is not limited.

[0185] In another specific embodiment, the source primary base station verifies the identity of the new secondary base station and then notifies the source secondary base station. The new primary base station notifies the new secondary base station of the identity information of the source secondary base station. The new secondary base station requests the source secondary base station to send the stored UE information to the new secondary base station.

[0186] like Figure 6 As shown, this embodiment includes the following steps:

[0187] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0188] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0189] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0190] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station, which carries the information of the new secondary base station so that the source primary base station can verify the identity of the new secondary base station;

[0191] Step 3a: After verification by the source primary base station, the identity information of the new secondary base station (such as base station identification, etc.) is sent to the source secondary base station;

[0192] Step 4: The source primary base station carries the identity information of the source secondary base station (such as base station identifier, etc.) in the Retrive UE context Response message;

[0193] Step 4a: The new primary base station sends the identity information of the source secondary base station (such as base station identification, etc.) to the new secondary base station;

[0194] Step 4b: the new secondary base station sends a message to the source secondary base station to request the UE information stored by the source secondary base station;

[0195] Step 3b: The source secondary base station sends the stored UE information to the new secondary base station;

[0196] Step 5: The new primary base station sends an RRC Resume message to the UE;

[0197] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0198] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0199] Step 9a: the new secondary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0200] Step 9b: the source primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0201] In this embodiment, it is worth noting that only one of step 9a and step 9b can be executed, and the order of step 3a and step 4 is not limited.

[0202] In another specific embodiment, the source primary base station verifies the identity of the new secondary base station and then notifies the source secondary base station. The new primary base station notifies the new secondary base station of the identity information of the source secondary base station. After the set timer times out, the new secondary base station requests the source secondary base station for UE information.

[0203] like Figure 7 As shown, this embodiment specifically includes the following steps:

[0204] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0205] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0206] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0207] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station, which carries the information of the new secondary base station so that the source primary base station can verify the identity of the new secondary base station;

[0208] Step 3a: After verification, the source primary base station sends the identity information of the new secondary base station (such as base station identification, etc.) to the source secondary base station, and requests the source secondary base station to send the stored UE information to the new secondary base station;

[0209] Step 4: The source primary base station carries the identity information of the source secondary base station (such as base station identifier, etc.) in the Retrive UE context Response message;

[0210] Step 4a: The new primary base station sends the identity information of the source secondary base station (such as base station identification, etc.) to the new secondary base station;

[0211] After receiving the source secondary base station identity information (such as base station identification) sent by the new primary base station, the new secondary base station sets a timer. After the timer times out, step 4b is executed to request UE information of the source secondary base station;

[0212] Step 3b: The source secondary base station sends the stored UE information to the new secondary base station;

[0213] Step 5: The new primary base station sends an RRC Resume or RRC Release message to the UE;

[0214] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0215] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0216] Step 9a: the new secondary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0217] Step 9b: the source primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0218] In this embodiment, it is worth noting that only one of step 9a and step 9b can be executed, and the order of step 3a and step 4 is not limited.

[0219] In another specific embodiment, the source primary base station notifies the source secondary base station of the identity information of the new primary base station (such as base station identification, etc.), requests the source secondary base station to send UE information to the new primary base station, and the source secondary base station sends its stored UE information to the new primary base station, which then sends it to the new secondary base station.

[0220] like Figure 8 As shown, this embodiment specifically includes the following steps:

[0221] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0222] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0223] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0224] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station;

[0225] Step 3a: The source primary base station sends the identity information (such as base station identification, etc.) of the new primary base station to the source secondary base station, and requests the source secondary base station to send the stored UE information to the new primary base station;

[0226] Step 4: The source primary base station sends a Retrive UE context Response message to the new primary base station, which carries the identity information of the source secondary base station (such as base station identifier, etc.);

[0227] Step 4a: The source secondary base station sends the stored UE information to the new primary base station;

[0228] Step 4b: The new primary base station sends the UE information of the source secondary base station to the new secondary base station;

[0229] Step 5: The new primary base station sends an RRC Resume or RRC Release message to the UE;

[0230] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0231] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0232] Step 9a: the new primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0233] Step 9b: the source primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0234] In this embodiment, it is worth noting that only one of step 9a and step 9b can be executed, and the order of step 3a and step 4 is not limited.

[0235] In another specific embodiment, the source primary base station notifies the source secondary base station of the identity information of the new primary base station (such as base station identification, etc.), the new primary base station requests UE information from the source secondary base station, the source secondary base station sends the UE information to the new primary base station, and the new primary base station sends it to the new secondary base station.

[0236] like Fig. 9 As shown, this embodiment specifically includes the following steps:

[0237] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0238] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0239] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0240] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station;

[0241] Step 3a: The source primary base station sends the identity information (such as base station identification, etc.) of the new primary base station to the source secondary base station, and requests the source secondary base station to send the stored UE information to the new primary base station;

[0242] Step 4: The source primary base station sends a Retrive UE context Response message to the new primary base station, which carries the identity information of the source secondary base station (such as base station identifier, etc.);

[0243] Step 3b: the new primary base station sends a message to the source secondary base station to request the UE information stored by the source secondary base station;

[0244] Step 4a: The source secondary base station sends the stored UE information to the new primary base station;

[0245] Step 4b: The new primary base station sends the UE information of the source secondary base station to the new secondary base station;

[0246] Step 5: The new primary base station sends an RRC Resume or RRC Release message to the UE;

[0247] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0248] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0249] Step 9a: the new primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0250] Step 9b: the source primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0251] In this embodiment, it is worth noting that only one of step 9a and step 9b can be executed, and the order of step 3a and step 4 is not limited.

[0252] In another specific embodiment, the source primary base station notifies the source secondary base station of the identity information of the new primary base station (such as a base station identifier, etc.). After the set timer expires, the new primary base station requests the source secondary base station for UE information. The source secondary base station sends the UE information to the new primary base station, and the new primary base station sends it to the new secondary base station.

[0253] like Fig.10 As shown, this embodiment specifically includes the following steps:

[0254] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0255] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0256] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0257] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station;

[0258] Step 3a: The source primary base station sends the identity information (such as base station identification, etc.) of the new primary base station to the source secondary base station, and requests the source secondary base station to send the stored UE information to the new primary base station;

[0259] Step 4: The source primary base station sends a Retrive UE context Response message to the new primary base station, which carries the identity information of the source secondary base station (such as base station identifier, etc.);

[0260] After receiving the identity information of the source secondary base station (such as a base station identifier, etc.), the new primary base station sets a timer. After the timer times out, step 3b is executed, and the new primary base station sends a message to the source secondary base station to request the UE information stored by the source secondary base station;

[0261] Step 4a: The source secondary base station sends the stored UE information to the new primary base station;

[0262] Step 4b: The new primary base station sends the UE information of the source secondary base station to the new secondary base station;

[0263] Step 5: The new primary base station sends an RRC Resume or RRC Release message to the UE;

[0264] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0265] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0266] Step 9a: the new primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0267] Step 9b: the source primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0268] In this embodiment, it is worth noting that only one of step 9a and step 9b can be executed, and the order of step 3a and step 4 is not limited.

[0269] In another specific embodiment, the source primary base station verifies the identity of the new secondary base station, the source primary base station requests UE information of the source secondary base station, and the source primary base station sends the UE information of the source secondary base station to the new secondary base station.

[0270] like Fig.11 As shown, this embodiment specifically includes the following steps:

[0271] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0272] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0273] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0274] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station, which carries the identity information of the new secondary base station for verification by the source primary base station;

[0275] Step 3a: The source primary base station requests the UE information stored by the source secondary base station;

[0276] Step 3b: The source secondary base station sends the stored UE information to the source primary base station;

[0277] Step 4: The source primary base station sends a Retrive UE context Response message to the new primary base station;

[0278] Step 4a: The new primary base station sends the identity information of the source primary base station (such as base station identification, etc.) to the new secondary base station;

[0279] Step 4b: The source primary base station sends the UE information of the source secondary base station to the new secondary base station;

[0280] Step 5: The new primary base station sends an RRC Resume or RRC Release message to the UE;

[0281] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0282] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0283] Step 9a: the new primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0284] In this embodiment, it is worth noting that steps 3a and 3b can be in any position in step 3 and step 4b, and the order of step 4 and step 4b is not limited. If the verification fails, the new primary base station tells the new secondary base station to delete the UE information.

[0285] In another specific embodiment, the source primary base station verifies the identity of the new secondary base station, the new primary base station informs the new secondary base station of the source primary base station identity information, the new secondary base station requests the source primary base station for UE information of the source secondary base station, and the source primary base station sends the UE information of the source secondary base station to the new secondary base station.

[0286] like Fig.12 As shown, this embodiment specifically includes the following steps:

[0287] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0288] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0289] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0290] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station, which carries the identity information of the new secondary base station for verification by the source primary base station;

[0291] Step 4: The source primary base station sends a Retrive UE context Response message to the new primary base station;

[0292] Step 4a: The new primary base station sends the identity information of the source primary base station (such as base station identification, etc.) to the new secondary base station;

[0293] Step 4ab: the new secondary base station sends a message to the source primary base station to request UE information of the source secondary base station;

[0294] Step 3a: The source primary base station requests the UE information stored by the source secondary base station;

[0295] Step 3b: The source secondary base station sends the stored UE information to the source primary base station;

[0296] Step 4b: The source primary base station sends the UE information of the source secondary base station to the new secondary base station;

[0297] Step 5: The new primary base station sends an RRC Resume or RRC Release message to the UE;

[0298] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0299] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0300] Step 9a: the new primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0301] In this embodiment, it is worth noting that steps 3a and 3b can be placed at any position in step 3 and step 4b.

[0302] In another specific embodiment, the source primary base station verifies the identity of the new secondary base station, the new primary base station informs the new secondary base station of the identity information of the source primary base station, the new secondary base station sets a timer that requests the source primary base station for UE information of the source secondary base station after it times out, and the source primary base station sends the UE information of the source secondary base station to the new secondary base station.

[0303] like Fig.13 As shown, this embodiment specifically includes the following steps:

[0304] Step 1: The UE sends an RRC Resume Request message to the new primary base station;

[0305] Step 2a: The new primary base station sends an SN Addition Request message to the new secondary base station;

[0306] Step 2b: The new secondary base station sends an SN Addition Request ACK message to the new primary base station;

[0307] Step 3: The new primary base station sends a Retrive UE context Request message to the source primary base station, which carries the identity information of the new secondary base station for verification by the source primary base station;

[0308] Step 3a: The source primary base station requests the UE information stored by the source secondary base station;

[0309] Step 3b: The source secondary base station sends the stored UE information to the source primary base station;

[0310] Step 4: The source primary base station sends a Retrive UE context Response message to the new primary base station;

[0311] Step 4a: The new primary base station sends the identity information of the source primary base station (such as base station identification, etc.) to the new secondary base station;

[0312] After receiving the identity information of the new primary base station (such as a base station identifier, etc.), the new secondary base station sets a timer. After the timer times out, step 4ab is executed to request the UE information of the source secondary base station from the source primary base station;

[0313] Step 4b: The source primary base station sends the UE information of the source secondary base station to the new secondary base station;

[0314] Step 5: The new primary base station sends an RRC Resume or RRC Release message to the UE;

[0315] Steps 6 to 8: Path switching process, such as Figure 2 As shown in steps 6 to 8;

[0316] Step 9: The new primary base station sends a UE context Release message to the source primary base station to release the UE context;

[0317] Step 9a: the new primary base station sends a message to the source secondary base station to release the UE information stored in the source secondary base station.

[0318] In this embodiment, it is worth noting that steps 3a and 3b can be in any position in step 3 and step 4b, and the order of step 4 and step 4b is not limited. If the verification fails, the new primary base station tells the new secondary base station to delete the UE information.

[0319] The embodiment of the present invention also provides a dual connection secondary node recovery device, which is applied to a source primary base station, such as Fig.14 As shown, the device includes a transceiver 11 and a processor 12.

[0320] The transceiver 11 is used to send a first message to the source secondary base station, wherein the first message requests to obtain the terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to the new primary base station and / or the new secondary base station; and / or, the first message carries the identifier of the new primary base station and / or the new secondary base station.

[0321] In some embodiments, the processor 12 is configured to verify the new primary base station and / or the new secondary base station.

[0322] In some embodiments, the transceiver 11 is further configured to receive a second message from the new secondary base station, where the second message requests to obtain the terminal information stored in the source secondary base station.

[0323] In some embodiments, the transceiver 11 is further configured to receive the terminal information sent by the source secondary base station; and send the terminal information to the new primary base station and / or the new secondary base station.

[0324] In some embodiments, the transceiver 11 is further used to receive a third message sent by the new primary base station; the third message is used to instruct the release of the stored terminal information; and send the third message to the source secondary base station to instruct the source secondary base station to release the stored terminal information.

[0325] The embodiment of the present invention also provides a dual-connection secondary node recovery device, which is applied to a source secondary base station, such as Fig.14 As shown, the device includes a transceiver 11 and a processor 12.

[0326] The transceiver 11 is used to receive a first message sent by a source main base station, wherein the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new main base station and / or a new secondary base station of the terminal; and / or, the first message carries the identifier of the new main base station and / or the new secondary base station; and sends the terminal information to the source main base station and / or the new main base station and / or the new secondary base station.

[0327] In some embodiments, the transceiver 11 is further configured to receive a fourth message sent by the new primary base station and / or a fifth message sent by the new secondary base station, wherein the fourth message and the fifth message request to obtain the terminal information.

[0328] In some embodiments, the transceiver 11 is further configured to receive a third message sent by the source primary base station and / or the new primary base station and / or the new secondary base station;

[0329] The processor 12 is used for releasing the stored terminal information.

[0330] The embodiment of the present invention also provides a dual-connection secondary node recovery device, which is applied to a new primary base station, such as Fig.14 As shown, the device includes a transceiver 11 and a processor 12.

[0331] The transceiver 11 is used to receive terminal information sent by a source primary base station and / or a source secondary base station, where the terminal information is terminal information stored by the source secondary base station.

[0332] In some embodiments, the transceiver 11 is used to send the terminal information to the new secondary base station.

[0333] In some embodiments, the transceiver 11 is configured to send a sixth message to the source primary base station, where the sixth message requests the source primary base station to verify the new secondary base station.

[0334] In some embodiments, the transceiver 11 is used to send the identifier of the source primary base station and / or the source secondary base station to the new secondary base station.

[0335] In some embodiments, the transceiver 11 is used to set a first timer, and if the terminal information is not received after the first timer times out, send a fourth message to the source secondary base station, where the fourth message is used to request to obtain the terminal information.

[0336] In some embodiments, the transceiver 11 is configured to send a third message to the source primary base station and / or the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0337] The embodiment of the present invention also provides a dual-connection secondary node recovery device, which is applied to a new secondary base station, such as Fig.14 As shown, the device includes a transceiver 11 and a processor 12.

[0338] The transceiver 11 is used to receive terminal information sent by the source primary base station and / or the source secondary base station and / or the new primary base station, where the terminal information is the terminal information stored by the source secondary base station.

[0339] In some embodiments, the transceiver 11 is used to receive the identifier of the source main base station and / or the source auxiliary base station sent by the new main base station; send a second message to the source main base station and / or send a fifth message to the source auxiliary base station, and the second message and the fifth message are used to request to obtain the terminal information.

[0340] In some embodiments, the transceiver 11 is configured to send a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0341] In some embodiments, the transceiver 11 is used to set a second timer. If the terminal information is not received after the second timer expires, a fifth message is sent to the source auxiliary base station and / or a second message is sent to the source main base station. The fifth message and the second message request to obtain the terminal information.

[0342] The source main base station refers to the source main base station of the terminal, the source secondary base station refers to the source secondary base station of the terminal, the new main base station refers to the new main base station, and the new secondary base station refers to the new secondary base station; the first message is sent by the source main base station to the source secondary base station, requesting terminal information; the second message is sent by the new secondary base station to the source main base station, requesting terminal information; the third message is a message for releasing terminal information; the fourth message is sent by the new main base station to the source secondary base station, requesting terminal information; the fifth message is sent by the new secondary base station to the source secondary base station, requesting terminal information; the sixth message is sent by the new main base station to the source main base station, requesting terminal information.

[0343] The terminal information may include slice information, but is not limited to slice information.

[0344] In this embodiment, an interaction process between base stations is introduced so that the new secondary base station can obtain the UE information stored in the source secondary base station as quickly as possible by means of relaying through the source main base station or the new main base station or directly communicating with the source secondary base station, thereby reducing the signaling load and delay of the interaction between the UE and the new secondary base station, so that the UE can obtain the desired slice service as soon as possible.

[0345] The embodiment of the present invention also provides a dual-connection auxiliary node recovery device, such as Fig.15 As shown, it includes a memory 21, a processor 22, and a computer program stored in the memory 21 and executable on the processor 22; when the processor 22 executes the program, the dual-connection auxiliary node recovery method as described above is implemented.

[0346] In some embodiments, the dual-connection secondary node recovery device is applied to the source primary base station.

[0347] The processor 22 is used to send a first message to the source secondary base station, wherein the first message requests to obtain the terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to the new primary base station and / or the new secondary base station; and / or, the first message carries the identifier of the new primary base station and / or the new secondary base station.

[0348] In some embodiments, the processor 22 is configured to verify the new primary base station and / or the new secondary base station.

[0349] In some embodiments, the processor 22 is configured to receive a second message from the new secondary base station, where the second message requests to obtain the terminal information stored by the source secondary base station.

[0350] In some embodiments, the processor 22 is configured to receive the terminal information sent by the source secondary base station; and send the terminal information to the new primary base station and / or the new secondary base station.

[0351] In some embodiments, the processor 22 is configured to receive a third message sent by the new primary base station; the third message is used to instruct the release of the stored terminal information; and send the third message to the source secondary base station to instruct the source secondary base station to release the stored terminal information.

[0352] In some embodiments, the dual-connection secondary node recovery device is applied to a source secondary base station.

[0353] The processor 22 is used to receive a first message sent by a source main base station, wherein the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new main base station and / or a new secondary base station of the terminal; and / or, the first message carries an identifier of the new main base station and / or the new secondary base station; and sends the terminal information to the source main base station and / or the new main base station and / or the new secondary base station.

[0354] In some embodiments, the processor 22 is configured to receive a fourth message sent by the new primary base station and / or a fifth message sent by the new secondary base station, where the fourth message and the fifth message request to obtain the terminal information.

[0355] In some embodiments, the processor 22 is configured to receive a third message sent by the source primary base station and / or the new primary base station and / or the new secondary base station; and release the stored terminal information.

[0356] In some embodiments, the dual-connection secondary node recovery device is applied to a new primary base station, and the processor is used to receive terminal information sent by a source primary base station and / or a source secondary base station, and the terminal information is terminal information stored by the source secondary base station.

[0357] In some embodiments, the processor 22 is configured to send the terminal information to a new secondary base station.

[0358] In some embodiments, the processor 22 is configured to send a sixth message to the source primary base station, where the sixth message requests the source primary base station to verify the new secondary base station.

[0359] In some embodiments, the processor 22 is configured to send an identifier of the source primary base station and / or the source secondary base station to the new secondary base station.

[0360] In some embodiments, the processor 22 is configured to set a first timer, and if the terminal information is not received after the first timer times out, send a fourth message to the source secondary base station, where the fourth message is used to request to obtain the terminal information.

[0361] In some embodiments, the processor 22 is configured to send a third message to the source primary base station and / or the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0362] In some embodiments, the dual-connection secondary node recovery device is applied to the new secondary base station, and the processor is used to receive terminal information sent by the source primary base station and / or the source secondary base station and / or the new primary base station, and the terminal information is the terminal information stored by the source secondary base station.

[0363] In some embodiments, the processor 22 is used to receive the identifier of the source main base station and / or the source secondary base station sent by the new main base station; send a second message to the source main base station and / or send a fifth message to the source secondary base station, and the second message and the fifth message are used to request to obtain the terminal information.

[0364] In some embodiments, the processor 22 is configured to send a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

[0365] In some embodiments, the processor 22 is used to set a second timer. If the terminal information is not received after the second timer expires, a fifth message is sent to the source secondary base station and / or a second message is sent to the source main base station. The fifth message and the second message request to obtain the terminal information.

[0366] Among them, the source main base station refers to the source main base station of the terminal, the source secondary base station refers to the source secondary base station of the terminal, the new main base station refers to the new main base station, and the new secondary base station refers to the new secondary base station; the first message is sent by the source main base station to the source secondary base station, requesting terminal information; the second message is sent by the new secondary base station to the source main base station, requesting terminal information; the third message is a message for releasing terminal information; the fourth message is sent by the new main base station to the source secondary base station, requesting terminal information; the fifth message is sent by the new secondary base station to the source secondary base station, requesting terminal information; the sixth message is sent by the new main base station to the source main base station, requesting terminal information.

[0367] The terminal information may include slice information, but is not limited to slice information.

[0368] In this embodiment, an interaction process between base stations is introduced so that the new secondary base station can obtain the UE information stored in the source secondary base station as quickly as possible by means of relaying through the source main base station or the new main base station or directly communicating with the source secondary base station, thereby reducing the signaling load and delay of the interaction between the UE and the new secondary base station, so that the UE can obtain the desired slice service as soon as possible.

[0369] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the dual-connection secondary node recovery method described above are implemented.

[0370] Computer readable media include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage terminal devices to be detected or any other non-transmission media that can be used to store information that can be accessed by the computer terminal device to be detected. As defined in this article, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carriers.

[0371] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dual-connection secondary node recovery method, characterized in that: The method comprises: The source primary base station sends a first message to the source secondary base station, where the first message requests to obtain terminal information saved by the source secondary base station; or, the first message requests the source secondary base station to send the saved terminal information to a new primary base station or a new secondary base station and the first message carries an identifier of the new primary base station or the new secondary base station, and the terminal information is requested to be obtained by the new secondary base station; Wherein, the terminal information includes slice information; The source primary base station receives the terminal information sent by the source secondary base station; The source primary base station sends the terminal information to the new primary base station or the new secondary base station.

2. The method according to claim 1, characterized in that The method further comprises: The source primary base station verifies the new primary base station and / or the new secondary base station.

3. The method according to claim 1, characterized in that The method further comprises: The source primary base station receives a second message from the new secondary base station, where the second message requests to obtain the terminal information stored by the source secondary base station.

4. The method according to claim 1, characterized in that: The method further comprises: The source primary base station receives a third message sent by the new primary base station; the third message is used to indicate the release of the stored terminal information; The source primary base station sends a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

5. A dual-connection secondary node recovery method, characterized in that: The method comprises: The source secondary base station receives a first message sent by the source primary base station, where the first message requests to obtain the terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new primary base station or a new secondary base station of the terminal, and the first message carries an identifier of the new primary base station or the new secondary base station; The source secondary base station sends the terminal information to the source primary base station or the new primary base station or the new secondary base station; The terminal information is requested to be obtained by the new auxiliary base station; the terminal information includes slice information.

6. The method according to claim 5, characterized in that The method further comprises: The source secondary base station receives a fourth message sent by the new primary base station and / or a fifth message sent by the new secondary base station, where the fourth message and the fifth message request to obtain the terminal information.

7. The method according to claim 5, characterized in that The method further comprises: The source secondary base station receives a third message sent by the source primary base station and / or the new primary base station and / or the new secondary base station; The source secondary base station releases the stored terminal information.

8. A dual-connection secondary node recovery method, characterized in that: The method comprises: The new primary base station receives terminal information sent by the source primary base station or the source secondary base station, where the terminal information is terminal information saved by the source secondary base station, and the terminal information is requested by the new secondary base station; wherein the terminal information includes slice information; The new primary base station sends the terminal information to the new secondary base station.

9. The method according to claim 8, characterized in that The method further comprises: The new primary base station sends a sixth message to the source primary base station, where the sixth message requests the source primary base station to verify the new secondary base station.

10. The method according to claim 9, characterized in that The method further comprises: The new primary base station sends the identifiers of the source primary base station and / or the source secondary base station to the new secondary base station.

11. The method according to claim 8, characterized in that The method further comprises: The new primary base station sets a first timer, and if the terminal information has not been received after the first timer times out, sends a fourth message to the source secondary base station, where the fourth message is used to request to obtain the terminal information.

12. The method according to claim 8, characterized in that The method further comprises: The new primary base station sends a third message to the source primary base station and / or the source secondary base station, instructing the source secondary base station to release the stored terminal information.

13. A dual-connection secondary node recovery method, characterized in that: The method comprises: The new secondary base station receives terminal information sent by the source primary base station or the source secondary base station or the new primary base station, where the terminal information is the terminal information stored by the source secondary base station; Wherein, the terminal information includes slice information.

14. The method according to claim 13, characterized in that The method further comprises: Receiving, by the new secondary base station, an identifier of the source primary base station and / or the source secondary base station sent by the new primary base station; The new secondary base station sends a second message to the source primary base station and / or sends a fifth message to the source secondary base station, where the second message and the fifth message are used to request to obtain the terminal information.

15. The method according to claim 13, characterized in that The method further comprises: The new secondary base station sends a third message to the source secondary base station, instructing the source secondary base station to release the stored terminal information.

16. The method according to claim 13, characterized in that The method further comprises: The new secondary base station sets a second timer, and if the terminal information is not received after the second timer times out, sends a fifth message to the source secondary base station and / or sends a second message to the source primary base station, wherein the fifth message and the second message request to obtain the terminal information.

17. A dual-connection auxiliary node recovery device, characterized in that: Applied to a source primary base station, the device comprises a transceiver and a processor, The transceiver is configured to send a first message to a source secondary base station, where the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new primary base station or a new secondary base station and the first message carries an identifier of the new primary base station or the new secondary base station, and the terminal information is requested to be obtained by the new secondary base station; Wherein, the terminal information includes slice information; The source primary base station receives the terminal information sent by the source secondary base station; The source primary base station sends the terminal information to the new primary base station or the new secondary base station.

18. A dual-connection auxiliary node recovery device, characterized in that: Applied to a source secondary base station, the device includes a transceiver and a processor, The transceiver is used to receive a first message sent by a source primary base station, where the first message requests to obtain terminal information stored by the source secondary base station; or, the first message requests the source secondary base station to send the stored terminal information to a new primary base station or a new secondary base station of the terminal, and the first message carries an identifier of the new primary base station or the new secondary base station; Sending the terminal information to the source primary base station or the new primary base station or the new secondary base station, where the terminal information is requested to be obtained by the new secondary base station; Wherein, the terminal information includes slice information.

19. A dual-connection auxiliary node recovery device, characterized in that: Applied to a new master base station, the device comprises a transceiver and a processor, The transceiver is used to receive terminal information sent by a source primary base station or a source secondary base station, where the terminal information is terminal information stored by the source secondary base station and is requested to be obtained by a new secondary base station; Wherein, the terminal information includes slice information; The transceiver is further used for: the new primary base station sending the terminal information to the new secondary base station.

20. A dual-connection auxiliary node recovery device, characterized in that: Applied to a new auxiliary base station, the device includes a transceiver and a processor. The transceiver is used to receive terminal information sent by a source primary base station, a source secondary base station, or a new primary base station, where the terminal information is terminal information stored by the source secondary base station, and the terminal information is requested to be obtained by the new secondary base station; Wherein, the terminal information includes slice information.

21. A dual-connection auxiliary node recovery device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the dual-connection secondary node recovery method according to any one of claims 1 to 16 is implemented.

22. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in the dual-connection auxiliary node recovery method as described in any one of claims 1 to 16 are implemented.

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