Dual-connection reconstruction method, readable storage medium, and base station

Abstract

The present disclosure provides a dual-connection re-establishment method, applied to a primary base station, comprising: sending a configuration information request to a target secondary base station in response to an RRC connection re-establishment completion instruction sent by a terminal; receiving first configuration information fed back by the target secondary base station; and sending the first configuration information and second configuration information corresponding to the primary base station to the terminal, so that the terminal completes RRC connection reconfiguration with the primary base station and the target secondary base station based on the first configuration information and the second configuration information. The present disclosure also provides a readable storage medium and a base station.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a dual connectivity reestablishment method, a readable storage medium, and a base station. Background Art

[0002] During the dual-connection service process, the master base station (Master Node, referred to as MN) triggers re-establishment due to air interface quality or other configuration factors. The current protocol definition requires releasing the source secondary base station (Secondary Node, referred to as SN), and does not clearly describe the dual-connection configuration processing flow during the re-establishment process; the existing dual-connection re-establishment configuration process takes a long time and has a large interruption delay. Summary of the Invention

[0003] Embodiments of the present disclosure provide a dual connectivity reestablishment method, a readable storage medium, and a base station.

[0004] In a first aspect, an embodiment of the present disclosure provides a dual connectivity reestablishment method, applied to a primary base station side, including:

[0005] In response to the RRC connection re-establishment complete instruction sent by the terminal, sending a configuration information request to the target secondary base station;

[0006] receiving first configuration information fed back by the target secondary base station;

[0007] The first configuration information and second configuration information corresponding to the primary base station are sent to the terminal, so that the terminal completes RRC connection reconfiguration with the primary base station and the target secondary base station according to the first configuration information and the second configuration information.

[0008] In some embodiments, the configuration information request is sent in a secondary node modification request instruction;

[0009] Alternatively, the configuration information request is sent in a secondary node addition request instruction.

[0010] In some embodiments, the first configuration information and the second configuration information are sent in an RRC connection reconfiguration instruction.

[0011] In some embodiments, before the step of sending a configuration information request to the target secondary base station, the method further includes:

[0012] When the terminal does not need to switch to a secondary base station, a source secondary base station to which the terminal was last connected is determined as the target secondary base station.

[0013] In some embodiments, when the source secondary base station serves as the target secondary base station, the step of sending a configuration information request to the target secondary base station further includes:

[0014] A first instance maintenance request is sent to the target secondary base station, so that the target secondary base station maintains the terminal instance.

[0015] In some embodiments, the first instance maintain request is sent in a secondary node modify request instruction.

[0016] In some embodiments, when the source secondary base station serves as the target secondary base station, the step of sending a configuration information request to the target secondary base station further includes:

[0017] Sending a resource maintenance request to the target secondary base station, so that the target secondary base station maintains terminal resources;

[0018] A second instance maintenance request is sent to the terminal, so that the terminal maintains the source secondary base station instance.

[0019] In some embodiments, the resource maintenance request is sent in a secondary node modification request instruction.

[0020] In some embodiments, before the step of sending a configuration information request to the target secondary base station, the method further includes:

[0021] Receiving an RRC connection re-establishment request instruction sent by the terminal;

[0022] Feedback an RRC connection re-establishment instruction to the terminal, so that the terminal can complete the RRC connection re-establishment with the master base station.

[0023] In some embodiments, after the step of receiving the RRC connection re-establishment request instruction sent by the terminal and before the step of feeding back the RRC connection re-establishment instruction to the terminal, the method further includes:

[0024] In response to the terminal needing to perform a primary base station handover, context information of the terminal is acquired from a source primary base station to which the terminal was last connected.

[0025] In a second aspect, an embodiment of the present disclosure further provides a readable storage medium having a program stored thereon, wherein when the program is executed, the steps in the method provided in the aforementioned embodiment are implemented.

[0026] In a third aspect, an embodiment of the present disclosure further provides a base station, comprising:

[0027] one or more processors;

[0028] a memory having one or more programs stored therein;

[0029] When the one or more programs are executed by the one or more processors, the one or more processors are enabled to implement the steps in the method provided in the aforementioned embodiment.

[0030] The embodiments of the present disclosure provide a dual connection re-establishment method, a readable storage medium, and a base station. When the terminal completes the RRC connection re-establishment with the main base station, the MN sends a configuration information request to the target SN so that the target SN provides the corresponding first configuration information. Then, the first configuration information corresponding to the SN and the second configuration information corresponding to the MN are sent together to the UE so that the UE can establish a connection with the MN and the SN at one time. That is, the dual connection is configured at one time during the re-establishment process, thereby effectively reducing the time spent in the dual connection re-establishment process, reducing the interruption delay, and ensuring the user's throughput.

[0031] In addition, when the target SN is the source SN to which the UE was last connected, by sending a request to the source SN to control the SN to maintain the UE instance or the original configuration resources, the service interruption delay can be further reduced and the success rate of dual connection configuration can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing detailed example embodiments with reference to the accompanying drawings, in which:

[0033] Figure 1 A flowchart of a dual connection reestablishment method provided in an embodiment of the present disclosure;

[0034] Figure 2 A flowchart of another dual connection reestablishment method provided by an embodiment of the present disclosure;

[0035] Figure 3 A flowchart of another dual connection reestablishment method provided in an embodiment of the present disclosure;

[0036] Figure 4 A flowchart of another dual connection reestablishment method provided in an embodiment of the present disclosure;

[0037] Figure 5 A flowchart of another dual connection reestablishment method provided in an embodiment of the present disclosure;

[0038] Figure 6 A signaling diagram for implementing dual connectivity reestablishment in an embodiment of the present disclosure;

[0039] Figure 7 A signaling diagram for implementing dual connectivity reestablishment in an embodiment of the present disclosure;

[0040] Figure 8 A signaling diagram for implementing dual connectivity reestablishment in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] To enable those skilled in the art to better understand the technical solution of the present disclosure, a dual connectivity reestablishment method, a readable storage medium, and a base station provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0042] Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of this disclosure to those skilled in the art.

[0043] The terms used herein are used only to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, they specify the presence of the features, integers, steps, and / or operations, but do not preclude the presence or addition of one or more other features, integers, steps, and / or operations.

[0044] It will be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms, and these terms are only used to distinguish one object from another.

[0045] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined as such herein.

[0046] In the related art of dual connectivity re-establishment, SNs are added after the mobile node's cell is restored, and the corresponding SNs are re-added according to the secondary base station policy pre-configured in the mobile node. That is, after the primary base station completes the Radio Resource Control (RRC) connection re-establishment and reconfiguration process with the terminal (UE), the mobile node determines the target SN to connect to using a specific secondary base station selection policy. It then requests relevant matching information from the target SN and sends the target SN's configuration information to the terminal, allowing the UE to complete the reconfiguration with the target SN, thus achieving dual connectivity re-establishment.

[0047] Here, “reestablishment” specifically refers to: establishing a signaling radio bearer (SRB) between the UE and the base station; and “reconfiguration” specifically refers to: configuring a data bearer between the UE and the base station.

[0048] In actual applications, it is found that the dual connection reestablishment process takes a long time and has a large interruption delay, which leads to a sharp drop in user throughput. To solve the above technical problems, the embodiments of the present disclosure provide a dual connection reestablishment method.

[0049] Figure 1 A flowchart of a dual connection reestablishment method provided by an embodiment of the present disclosure is shown in FIG. Figure 1 As shown, the execution subject of the dual connection reestablishment method is the mobile node to which the UE is connected when performing dual connection reestablishment. The mobile node may be the source mobile node to which the UE was last connected, or a non-source mobile node. In addition, the target mobile node to which the UE is connected when performing dual connection reestablishment may be the source mobile node to which the UE was last connected, or a non-source mobile node. Specific application scenarios will be described in detail later. The dual connection reestablishment method includes:

[0050] Step S1: In response to the sent RRC connection re-establishment complete instruction, a configuration information request is sent to a target secondary base station.

[0051] After the UE completes the RRC connection reestablishment with the MN, the UE will send an RRC connection reestablishment complete (RRCConnection Reestablishment Complete) instruction to the MN to inform the MN that the RRC connection reestablishment process between the UE and the MN is completed.

[0052] Different from the related art, in the embodiment of the present disclosure, when the MN receives the RRC connection re-establishment completion instruction, the MN no longer immediately triggers sending its own configuration information to the UE for the reconfiguration process, but instead sends a configuration information request to the target SN so that the target SN can provide the corresponding configuration information.

[0053] In some embodiments, when the execution subject is the source MN (MN has not been handed over) and the target SN is the source SN (SN has not been handed over), the configuration information request is sent in a secondary node modification request (SN Modification Request, also known as secondary base station node modification request) instruction.

[0054] In some embodiments, when the execution subject is not the source MN (MN is switched) or the target SN is not the source SN (SN is switched), the configuration information request is sent in a secondary node addition request (SN Addition Request, also known as secondary base station node addition request) instruction.

[0055] Step S2: Receive first configuration information fed back by the target secondary base station.

[0056] Among them, the first configuration information includes the configuration parameters of the target SN required for the access process between the UE and the target SN; for example, the secondary cell group (SCG) configuration, Ethernet chip (including Ethernet media access controller MAC and physical interface transceiver PHY) configuration details, etc.

[0057] In some embodiments, when the configuration information request is sent in a secondary node modification request instruction, the first configuration information is sent back to the MN in a secondary node modification response (SN Modification Response) instruction.

[0058] In some embodiments, when the configuration information request is sent in a secondary node addition request instruction, the first configuration information is sent back to the MN in a secondary node addition response (SN Addition Response) instruction.

[0059] Step S3: Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.

[0060] The second configuration information corresponding to the MN includes configuration parameters of the MN required for the reconfiguration process between the UE and the MN; for example, Master Cell Group (MCG) configuration, Ethernet chip configuration details, etc.

[0061] The MN sends the first configuration information received in step S2 and its corresponding second configuration information to the terminal, so that the UE completes the reconfiguration with the target SN according to the first configuration information and completes the reconfiguration with the MN according to the second configuration information, thereby completing the dual connection between the UE and the MN and the SN. It should be noted that the specific process of completing the reconfiguration with the MN or SN according to the configuration information of the MN or SN belongs to the conventional technology in the field and is not described in detail here.

[0062] In some embodiments, the first configuration information and the second configuration information are sent in an RRC Connection Reconfiguration command.

[0063] In the present disclosure, when the MN receives the RRC connection re-establishment completion instruction, the MN sends a configuration information request to the target SN for the target SN to provide the corresponding first configuration information, and then sends the first configuration information corresponding to the SN and the second configuration information corresponding to the MN to the UE, so that the UE can establish a connection with the MN and the SN at one time, that is, the dual connection is configured at one time during the re-establishment process, thereby effectively reducing the time spent in the dual connection reconstruction process, reducing the interruption delay, and ensuring the user's throughput.

[0064] Figure 2 A flowchart of another dual connection reestablishment method provided by an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the method includes not only the above steps S1 to S3, but also steps S1a and S1b. Step S1a is performed before step S1, and step S1b can be performed simultaneously with step S1.

[0065] Step S1a: Determine whether the terminal needs to switch to a secondary base station.

[0066] In some scenarios, the main possible reasons for MN triggering dual connection re-establishment service are that MN configuration does not support it, or the downlink air interface signal quality of the MN cell is poor. Due to the difference in frequency band coverage of the MN and SN site cells, when the MN cell signal quality is poor, the SN cell signal quality may not be poor. At this time, the MN triggering re-establishment needs to consider the status processing of the SN. In addition, due to terminal mobility factors, MN re-establishment may be in the source cell of the source MN, or in other cells of the source MN. In most cases, a good connection is maintained between the NR and the UE. Otherwise, the UE will report the NR SCG Failure indication to the MN.

[0067] For the above scenario, the MN can determine whether the UE needs to switch SN based on a predefined judgment strategy. For example, if the signal quality of the source NR cell is good, there is no need to switch the SN; if the signal quality of the source SN cell is poor (the UE reports NR SCG Failure), it is necessary to switch the SN. It should be noted that the judgment strategy used to determine whether the UE needs to switch the SN can be preset and adjusted according to actual needs, and this disclosure does not limit this.

[0068] When step S1a determines that the UE does not need to switch SN, the source secondary base station to which the terminal was last connected is determined as the target secondary base station, and then steps S1b and S1 are executed simultaneously; when step S1a determines that the UE needs to switch SN, the target SN can be determined according to the pre-set secondary base station selection strategy, and then only step S1 is executed without executing step S1b.

[0069] Step S1b: Send a first instance maintenance request to the target secondary base station.

[0070] Step S1: Send a configuration information request to a target secondary base station.

[0071] After determining that the target SN is the source SN, steps S1b and S1 can be performed simultaneously. In some embodiments, the first instance maintenance request and the configuration information request are sent together in a secondary node modification request instruction. After receiving the secondary node modification request instruction, the source SN responds to the first instance maintenance request, maintains the UE instance and configures the new configuration, generates the first configuration information, and feeds the first configuration information back to the mobile node via a secondary node modification response instruction.

[0072] For the scenario where the SN remains unchanged, the technical solution disclosed in the present invention maintains the UE instance unchanged by controlling the source SN, so there is no need for backhaul, thereby reducing the service interruption delay.

[0073] After determining that the target SN is not the source SN, only step S1 is executed without step S1b. In some embodiments, the configuration information request is sent in a secondary node modification request instruction; in this case, the secondary node modification request instruction does not include a first instance maintenance request. After receiving the secondary node modification request instruction, the target SN creates a new UE instance and configures the new configuration, generates the first configuration information, and feeds the first configuration information back to the mobile node via a secondary node modification response instruction.

[0074] Step S2: Receive first configuration information fed back by the target secondary base station.

[0075] Step S3: Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.

[0076] Figure 3 A flowchart of another dual connection reestablishment method provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the method includes not only the above steps S1 to S3, but also steps S1a and S1c. Step S1a is executed before step S1, and step S1c can be executed simultaneously with step S1.

[0077] Step S1a: Determine whether the terminal needs to switch to a secondary base station.

[0078] When step S1a determines that the UE does not need to switch SN, the source secondary base station to which the terminal was last connected is determined as the target secondary base station, and then steps S1c, S1d and S1 are executed simultaneously; when step S1a determines that the UE needs to switch SN, the target SN can be determined according to a pre-set secondary base station selection strategy, and then only step S1 is executed without executing steps S1c and S1d.

[0079] Step S1c: Send a resource maintenance request to the target secondary base station, so that the target secondary base station maintains terminal resources.

[0080] Step S1d: Send a second instance maintenance request to the terminal.

[0081] Step S1: Send a configuration information request to a target secondary base station.

[0082] After determining that the target SN is the source SN, steps S1c, S1d, and S1 may be executed synchronously. In some embodiments, the resource maintenance request and the configuration information request are sent together in the auxiliary node modification request instruction. After receiving the auxiliary node modification request instruction, the source SN responds to the resource maintenance request, maintains the UE instance and uses the original configuration resources, generates the first configuration information, and feeds back the first configuration information to the MN through the auxiliary node modification response instruction. The UE responds to the second instance maintenance request sent by the MN, maintains the source SN instance, and does not release the SCG, so as to reduce the SN secondary acceptance process when subsequently reconfiguring with the source SN, thereby improving the success rate of the dual-connection configuration.

[0083] It should be noted that the second instance maintenance request may be sent via the SRB established between the UE and the MN.

[0084] For scenarios where the SN remains unchanged, the disclosed technical solution maintains the UE instance unchanged and uses the original configured resources by controlling the source SN, eliminating the need for backhaul and thus reducing service interruption delays. Furthermore, it reduces the number of SN reacquisitions and improves the success rate of dual connectivity configuration.

[0085] After determining that the target SN is not the source SN, only step S1 is executed without executing steps S1c and S1d.

[0086] Step S2: Receive first configuration information fed back by the target secondary base station.

[0087] Step S3: Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.

[0088] Figure 4 A flowchart of another dual connection reestablishment method provided in an embodiment of the present disclosure is shown in FIG. Figure 4 As shown, the method not only includes the above steps S1 to S3, but also includes: step S01 and step S02.

[0089] Step S01: Receive an RRC connection re-establishment request instruction sent by a terminal.

[0090] When the UE needs to reestablish dual connectivity, it will send an RRC Connection Reestablishment Request instruction to the MN to be connected. The RRC Connection Reestablishment Request instruction can be sent over SRB 0. The MN to be connected may be the source MN to which the UE was last connected, or a non-source MN.

[0091] Step S02: Feedback an RRC connection re-establishment instruction to the terminal, so that the terminal can complete the RRC connection re-establishment with the master base station.

[0092] In response to the RRC Connection Reestablishment Request command, the MN verifies whether it can reestablish a connection with the UE. If successful, it returns an RRC Connection Reestablishment command to the UE. This command carries instructions for the UE to reestablish the Packet Data Convergence Protocol (PDCP) and Radio Link Control (RLC) sublayer of SRB1, update security keys, and resume operations on SRB1.

[0093] After receiving the RRC connection re-establishment instruction, the UE completes the re-establishment process with the MN and feeds back an RRC connection re-establishment completion instruction to the MN.

[0094] Step S1: Send a configuration information request to a target secondary base station.

[0095] Step S2: Receive first configuration information fed back by the target secondary base station.

[0096] Step S3: Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.

[0097] Figure 5 A flowchart of another dual connection reestablishment method provided in an embodiment of the present disclosure is shown in FIG. Figure 5 As shown, the method not only includes the above steps S1 to S3, but also includes: steps S01, S02a and step S02.

[0098] Step S01: Receive an RRC connection re-establishment request instruction sent by a terminal.

[0099] In this embodiment, the MN to be connected is a non-source MN, that is, the UE sends an RRC connection re-establishment request instruction to the non-source MN.

[0100] Step S02a: In response to the terminal needing to switch the primary base station, the context information of the terminal is obtained from the source primary base station to which the terminal was last connected.

[0101] The non-source MN can determine that the terminal needs to perform MN switching based on the relevant information recorded in the RRC connection re-establishment request instruction. At this time, the non-source MN obtains the UE context information from the source MN through the base station switching process based on the X2 interface; the context information may include the UE's network capability information, authentication information, negotiated security algorithm, key, established connection information, bearer information, etc.

[0102] The non-source MN verifies whether it can re-establish the connection with the UE according to the RRC connection re-establishment request instruction and the context information of the UE obtained from the source MN; if the verification is successful, it feeds back the RRC connection re-establishment instruction to the UE.

[0103] Step S02: Feedback an RRC connection re-establishment instruction to the terminal, so that the terminal can complete the RRC connection re-establishment with the master base station.

[0104] Step S1: Send a configuration information request to a target secondary base station.

[0105] It should be noted that the target SN may be the source SN to which the UE was last connected, or may be a non-source MN.

[0106] Step S2: Receive first configuration information fed back by the target secondary base station.

[0107] Step S3: Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.

[0108] It should be noted that the different steps in the above embodiments can be combined with each other to obtain a new technical solution, and the new technical solution thus combined also falls within the scope of protection of the present disclosure.

[0109] Several scenarios applicable to the technical solution of the present disclosure are described below by way of example, which will not limit the technical solution of the present disclosure.

[0110] Figure 6 A signaling diagram for implementing dual connectivity reestablishment in an embodiment of the present disclosure is shown in FIG. Figure 6 As shown, in this dual connection reestablishment scenario, the MN has not switched and the SN has not switched; that is, the MN to which the UE is to be connected is the source MN, and the target SN is the source SN. Specifically, the following scenarios can be corresponded:

[0111] 1) The MN re-establishes to the source cell of the source MN, and the signal quality of the source SN is better.

[0112] 2) The MN re-establishes to another cell of the source MN (MN intra-site cell handover), and the signal quality of the source SN is better.

[0113] The specific process is as follows:

[0114] A1. The UE sends an RRC connection re-establishment request instruction to the source MN.

[0115] A2. The source MN sends an RRC connection re-establishment instruction to the UE.

[0116] A3. The UE sends an RRC connection re-establishment complete instruction to the source MN.

[0117] A4. The source MN sends a secondary node modification request instruction to the source SN. The secondary node modification request instruction includes a first instance maintenance request and a configuration information request.

[0118] A5. The source SN maintains the UE instance and newly configures resources.

[0119] A6. The source SN sends a secondary node modification request response instruction to the source MN. The secondary node modification request response instruction includes the first configuration information of the source SN.

[0120] A7. The source MN sends an RRC connection reconfiguration instruction to the UE. The RRC connection reconfiguration instruction includes the first configuration information corresponding to the source SN and the second configuration information corresponding to the source MN.

[0121] A8. The UE completes the reconfiguration with the source SN and the source MN according to the first configuration information and the second configuration information, and sends an RRC Connection Reconfiguration Complete instruction to the source MN.

[0122] Figure 7 A signaling diagram for realizing dual connectivity reestablishment in an embodiment of the present disclosure is shown in FIG. Figure 7 As shown, Figure 7 Applicable scenarios and Figure 6 The same as in , I will not repeat it here.

[0123] The specific process is as follows:

[0124] B1. The UE sends an RRC connection re-establishment request instruction to the source MN.

[0125] B2. The source MN sends an RRC connection re-establishment instruction to the UE.

[0126] B3. The UE sends an RRC connection re-establishment complete instruction to the source MN.

[0127] B4. The source MN sends a secondary node modification request instruction to the source SN. The secondary node modification request instruction includes a resource maintenance request and a configuration information request.

[0128] B5. The source MN sends a second instance maintenance request to the UE, so that the UE can maintain the source SN instance without releasing the SCG.

[0129] B6. The source SN maintains the UE instance and uses the original configured resources.

[0130] B7. The source SN sends a secondary node modification request response instruction to the source MN. The secondary node modification request response instruction includes the first configuration information of the source SN.

[0131] B8. The source MN sends an RRC connection reconfiguration instruction to the UE. The RRC connection reconfiguration instruction includes the first configuration information corresponding to the source SN and the second configuration information corresponding to the source MN.

[0132] B9. The UE completes the reconfiguration with the source SN and the source MN according to the first configuration information and the second configuration information, and sends an RRC Connection Reconfiguration Complete instruction to the source MN.

[0133] Figure 8 A signaling diagram for realizing dual connectivity reestablishment in an embodiment of the present disclosure is shown in FIG. Figure 8 As shown, in this dual connection reestablishment scenario, the MN switches but the SN does not switch; that is, the target MN to be connected by the UE is a non-source MN, and the target SN is the source SN. Specifically, it corresponds to the following scenarios:

[0134] 1) The MN re-establishes to a cell that is not the source MN, and the non-source MN determines the target SN as the source SN (e.g., in a scenario where the UE moves);

[0135] The specific process is as follows:

[0136] C1. The source MN triggers base station handover and sends a handover reconfiguration instruction to the UE.

[0137] C2. The UE sends an RRC connection re-establishment request instruction to the non-source MN.

[0138] C3. The non-source MN obtains the UE context information from the source MN through the base station handover process based on the X2 interface and performs the corresponding verification process.

[0139] C4. The non-source MN sends an RRC connection re-establishment instruction to the UE.

[0140] C5. The UE sends an RRC connection re-establishment complete instruction to the non-source MN.

[0141] C6. The non-source MN sends a secondary node adding request instruction to the source SN, where the secondary node adding request instruction includes a configuration information request.

[0142] C7. When the secondary node addition request instruction does not include a second instance maintenance request and a resource maintenance request, the source SN creates a new instance and configures new resources.

[0143] C8. The source SN sends a secondary node adding request response instruction to the non-source MN, where the secondary node adding request response instruction includes the first configuration information of the source SN.

[0144] C9. The source MN sends an RRC connection reconfiguration instruction to the UE. The RRC connection reconfiguration instruction includes the first configuration information corresponding to the source SN and the second configuration information corresponding to the non-source MN.

[0145] C10. The UE completes the reconfiguration with the source SN and the non-source MN according to the first configuration information and the second configuration information, and sends an RRC connection reconfiguration complete instruction to the source MN.

[0146] Other application scenarios to which the technical solution of the present disclosure is applicable will not be described one by one here.

[0147] An embodiment of the present disclosure further provides a readable storage medium having a program stored thereon, wherein when the program is executed, the steps in the dual connectivity reestablishment method provided in the aforementioned embodiment are implemented.

[0148] An embodiment of the present disclosure also provides a base station, including: one or more processors and a memory, on which one or more programs are stored; when the one or more programs are executed by one or more processors, the one or more processors implement the steps in the dual connection reestablishment method provided in the aforementioned embodiment.

[0149] It will be appreciated by those skilled in the art that all or some of the steps in the method disclosed above, and the functional modules / units in the device can be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media generally embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0150] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly indicated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A dual connectivity reestablishment method, applied to a master base station side, comprising: In response to the RRC connection re-establishment complete instruction sent by the terminal, sending a configuration information request to the target secondary base station; receiving first configuration information fed back by the target secondary base station; Sending the first configuration information and second configuration information corresponding to the primary base station to the terminal, so that the terminal completes RRC connection reconfiguration with the primary base station and the target secondary base station according to the first configuration information and the second configuration information; When the target secondary base station is the source secondary base station to which the terminal was last connected, the step of sending a configuration information request to the target secondary base station further includes: A first instance maintenance request is sent to the target secondary base station, so that the target secondary base station maintains the terminal instance, wherein the target secondary base station maintains the terminal instance and newly configures in response to the first instance maintenance request to generate the first configuration information.

2. The method according to claim 1, wherein The configuration information request is sent in a secondary node modification request instruction; Alternatively, the configuration information request is sent in a secondary node addition request instruction.

3. The method according to claim 1, wherein The first configuration information and the second configuration information are sent in an RRC connection reconfiguration instruction.

4. The method according to claim 1, wherein Before the step of sending a configuration information request to the target secondary base station, the method further includes: When the terminal does not need to switch to a secondary base station, a source secondary base station to which the terminal was last connected is determined as the target secondary base station.

5. The method according to claim 1, wherein The first instance maintain request is sent in a secondary node modify request instruction.

6. The method according to claim 4, wherein: When the source secondary base station serves as the target secondary base station, the step of sending a configuration information request to the target secondary base station further includes: Sending a resource maintenance request to the target secondary base station, so that the target secondary base station maintains terminal resources; A second instance maintenance request is sent to the terminal, so that the terminal maintains the source secondary base station instance.

7. The method according to claim 6, wherein: The resource maintenance request is sent in a secondary node modification request instruction.

8. The method according to any one of claims 1 to 7, wherein Before the step of sending a configuration information request to the target secondary base station, the method further includes: Receiving an RRC connection re-establishment request instruction sent by the terminal; Feedback an RRC connection re-establishment instruction to the terminal, so that the terminal can complete the RRC connection re-establishment with the master base station.

9. The method according to claim 8, wherein After the step of receiving the RRC connection re-establishment request instruction sent by the terminal and before the step of feeding back the RRC connection re-establishment instruction to the terminal, the method further includes: In response to the terminal needing to perform a primary base station handover, context information of the terminal is acquired from a source primary base station to which the terminal was last connected.

10. A readable storage medium having a program stored thereon, wherein: When the program is executed, the steps of the method according to any one of claims 1 to 9 are implemented.

11. A base station, wherein: include: one or more processors; a memory having one or more programs stored therein; When the one or more programs are executed by the one or more processors, the one or more processors are enabled to implement the steps of the method according to any one of claims 1 to 9.

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