WO2021093599A1 - 双连接重建方法、可读存储介质和基站 - Google Patents

双连接重建方法、可读存储介质和基站 Download PDF

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Publication number
WO2021093599A1
WO2021093599A1 PCT/CN2020/124988 CN2020124988W WO2021093599A1 WO 2021093599 A1 WO2021093599 A1 WO 2021093599A1 CN 2020124988 W CN2020124988 W CN 2020124988W WO 2021093599 A1 WO2021093599 A1 WO 2021093599A1
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WIPO (PCT)
Prior art keywords
base station
configuration information
terminal
request
secondary base
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PCT/CN2020/124988
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English (en)
French (fr)
Inventor
王军涛
杜高鹏
黄雪英
司伟
刘蕊
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中兴通讯股份有限公司
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Priority to JP2022527870A priority Critical patent/JP7383149B2/ja
Priority to EP20888286.0A priority patent/EP4054261A4/en
Priority to US17/776,128 priority patent/US20220304095A1/en
Publication of WO2021093599A1 publication Critical patent/WO2021093599A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the embodiments of the present disclosure relate to the field of communication technologies, and in particular to a dual-connection reconstruction method, a readable storage medium, and a base station.
  • the master base station (Master Node, referred to as MN) triggers re-establishment due to air interface quality or other configuration factors.
  • MN master Node
  • the current protocol defines that the source secondary base station (Secondary Node, referred to as SN) needs to be released, and the re-establishment process is not clearly stated Dual-connection configuration processing flow; the existing dual-connection re-establishment configuration process takes a long time, and the interruption time delay is large.
  • the addition of the secondary base station (SN) is to add the corresponding SN again according to the secondary base station strategy preset in the MN after the cell of the primary base station (MN) is restored. That is, after the primary base station completes the radio resource control (Radio Resource Control, RRC) connection re-establishment and reconfiguration process between the primary base station and the terminal (UE), the MN determines the target SN to be connected through a certain secondary base station selection strategy , And then request relevant matching information from the target SN, and send the configuration information of the target SN to the terminal for the UE to complete the reconfiguration with the target SN, so as to realize the dual connection re-establishment.
  • RRC Radio Resource Control
  • the embodiments of the present disclosure provide a dual-connection reconstruction method, a readable storage medium, and a base station.
  • the embodiments of the present disclosure provide a dual connection re-establishment method, applied to the main base station side, including: responding to the radio resource control (Radio Resource Control, RRC) connection re-establishment completion instruction sent by the terminal, sending the target secondary
  • the base station sends a configuration information request; receives the first configuration information fed back by the target secondary base station; sends the first configuration information and the second configuration information corresponding to the primary base station to the terminal for the terminal to follow
  • the first configuration information and the second configuration information complete the RRC connection reconfiguration with the primary base station and the target secondary base station.
  • the embodiments of the present disclosure also provide a readable storage medium that stores a program, wherein when the program is executed, the steps in the method provided in the foregoing embodiments are implemented.
  • embodiments of the present disclosure also provide a base station, including: one or more processors; a memory, storing one or more programs; wherein, when the one or more programs are used by the one or more When executed by the two processors, the one or more processors are caused to implement the steps in the methods provided in the foregoing embodiments.
  • the embodiments of the present disclosure provide a dual connection re-establishment method, applied to the terminal side, including: sending an RRC connection re-establishment completion instruction to a primary base station, so that the primary base station can send a configuration information request to the target secondary base station.
  • FIG. 1 is a flowchart of a dual-connection reconstruction method provided by an embodiment of the disclosure
  • FIG. 2 is a flowchart of another dual-connection re-establishment method provided by an embodiment of the disclosure
  • FIG. 3 is a flowchart of another dual-connection re-establishment method provided by an embodiment of the disclosure
  • FIG. 4 is a flowchart of yet another dual-connection re-establishment method provided by an embodiment of the present disclosure
  • FIG. 5 is a flowchart of still another dual-connection re-establishment method provided by an embodiment of the disclosure.
  • Fig. 6 is a signaling diagram for realizing dual connection re-establishment in an embodiment of the disclosure
  • FIG. 7 is a signaling diagram for realizing dual connection re-establishment in an embodiment of the disclosure.
  • Fig. 8 is a signaling diagram for realizing dual connection re-establishment in an embodiment of the disclosure
  • FIG. 9 is a schematic structural diagram of a base station provided by an embodiment of the disclosure.
  • FIG. 10 is a flowchart of a dual connection re-establishment method provided by an embodiment of the disclosure.
  • the addition of the secondary base station (SN) is to add the corresponding SN again according to the secondary base station strategy preset in the MN after the cell of the primary base station (MN) is restored. That is, after the primary base station completes the radio resource control (Radio Resource Control, RRC) connection re-establishment and reconfiguration process between the primary base station and the terminal (UE), the MN determines the target SN to be connected through a certain secondary base station selection strategy , And then request relevant matching information from the target SN, and send the configuration information of the target SN to the terminal for the UE to complete the reconfiguration with the target SN, so as to realize the dual connection re-establishment.
  • RRC Radio Resource Control
  • re-establishment specifically refers to: setting up command bearers (Signalling Radio Bearers, SRB) between the UE and the base station;
  • reconfiguration specifically refers to: configuring the data bearer between the UE and the base station.
  • the embodiments of the present disclosure provide a dual-connection reconstruction method.
  • FIG. 1 is a flowchart of a dual-connection re-establishment method provided by an embodiment of the disclosure.
  • the executor of the dual-connection re-establishment method is the MN to which the UE is connected during dual-connection re-establishment, and the MN may be
  • the source MN that the UE was connected to last time may also be a non-source MN; in addition, the target SN that the UE was connected to during the dual connection reestablishment may be the source SN that the UE was connected to last time, or it may be a non-source MN.
  • the dual connection reconstruction method includes:
  • Step S1 In response to the sent RRC connection re-establishment completion instruction, a configuration information request is sent to the target secondary base station.
  • the UE After the UE completes the RRC connection re-establishment with the MN, the UE will send an RRC Connection Reestablishment Complete command to the MN to inform the MN that it has completed the RRC connection re-establishment procedure with the UE.
  • the MN when the MN receives the RRC connection re-establishment completion instruction, the MN no longer immediately triggers the sending of its configuration information to the UE for the reconfiguration process, but sends the target The SN sends a configuration information request for the target SN to provide corresponding configuration information.
  • the configuration information request is in the secondary node modification request (SN Modification Request, also known as the secondary base station). Node modification request) command is sent.
  • the configuration information request is added in the secondary node (SN Addition Request, also known as the secondary base station). Node Add Request) command is sent.
  • Step S2 Receive the first configuration information fed back by the target secondary base station.
  • 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, secondary cell group (SCG) configuration, Ethernet chip (including Ethernet) Network media access controller MAC and physical interface transceiver PHY) configuration details, etc.
  • SCG secondary cell group
  • Ethernet chip including Ethernet
  • Network media access controller MAC and physical interface transceiver PHY
  • the first configuration information is sent back to the MN in the secondary node modification response (SN Modification Response) instruction.
  • the first configuration information is sent back to the MN in the secondary node addition response (SN Addition Response) instruction.
  • Step S3 Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.
  • 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 Wait.
  • MCG master cell group
  • Ethernet chip configuration details Wait for example, Ethernet chip configuration details Wait.
  • the MN sends the first configuration information received in step S2 and the second configuration information corresponding to itself to the terminal, so that the UE can complete the reconfiguration with the target SN according to the first configuration information, and complete the communication with the target SN according to the second configuration information.
  • the reconfiguration of the MN completes the dual connection between the UE and the MN and SN. It should be noted that completing the specific process of reconfiguration with the MN or SN according to the configuration information of the MN or SN belongs to a conventional technology in the field and will not be described in detail here.
  • the first configuration information and the second configuration information are sent in an RRC Connection Reconfiguration (RRC Connection Reconfiguration) instruction.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • the MN 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 the first configuration information corresponding to the SN and The second configuration information corresponding to the MN is sent to the UE together for the UE to establish a connection with the MN and SN at one time, that is, the dual connection is configured at one time during the re-establishment process, which can effectively reduce the time spent in the dual connection re-establishment process , To reduce the interruption delay and ensure the throughput of users.
  • FIG. 2 is a flowchart of another dual-connection reconstruction method provided by an embodiment of the disclosure. As shown in FIG. 2, the method not only includes the above steps S1 to S3, but also includes: step S1a and step S1b. Wherein, step S1a is executed before step S1, and step S1b can be executed simultaneously with step S1.
  • Step S1a It is judged whether the terminal needs to switch the secondary base station.
  • the main possible reasons for the MN triggering the dual-connection re-establishment service are that the 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 between MN and SN site cells, when the signal quality of the MN cell is poor, the signal quality of the SN cell may not be poor. At this time, MN triggers re-establishment and needs to consider SN status processing. In addition, due to terminal mobility, the MN may be re-established 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 NR SCG. Failure is indicated to MN.
  • the MN can determine whether the UE needs to switch the SN based on a predefined determination 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), the SN needs to be switched. It should be noted that the determination strategy used to determine whether the UE needs to switch the SN can be preset and adjusted according to actual needs, which is not limited in the present disclosure.
  • step S1a When it is determined in step S1a that the UE does not need to switch SN, the source secondary base station connected to the terminal last time is determined as the target secondary base station, and then step S1b and step S1 are performed simultaneously; when step S1a determines that the UE needs to switch SN, then The target SN is determined according to the preset secondary base station selection strategy, and then only step S1 is executed without step S1b.
  • Step S1b Send a first instance maintenance request to the target secondary base station.
  • Step S1 Send a configuration information request to the target secondary base station.
  • step S1b and step S1 can be performed synchronously.
  • the first instance maintenance request and the configuration information request are sent together in the secondary node modification request instruction.
  • the source SN After receiving the secondary node modification request instruction, the source SN maintains the UE instance and configures a new configuration in response to the first instance maintenance request, generates first configuration information, and feeds the first configuration information back to the MN through the secondary node modification response instruction.
  • the technical solution of the embodiment of the present disclosure maintains the UE instance unchanged by controlling the source SN, and therefore does not need to perform back transmission, thereby reducing the service interruption time delay.
  • step S1 After determining that the target SN is not the source SN, only step S1 is performed without performing step S1b.
  • the configuration information request is sent in the secondary node modification request instruction; at this time, the secondary node modification request instruction does not include the first instance maintenance request.
  • the target SN After receiving the secondary node modification request instruction, the target SN creates a new UE instance and configures a new configuration, generates first configuration information, and feeds the first configuration information back to the MN through the secondary node modification response instruction.
  • Step S2 Receive the first configuration information fed back by the target secondary base station.
  • Step S3 Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.
  • Fig. 3 is a flowchart of another dual-connection reconstruction method provided by an embodiment of the present disclosure. As shown in Fig. 3, the method not only includes the above steps S1 to S3, but also includes: step S1a and step S1c. Wherein, step S1a is executed before step S1, and step S1c can be executed simultaneously with step S1.
  • Step S1a It is judged whether the terminal needs to switch the secondary base station.
  • step S1a When it is determined in step S1a that the UE does not need to switch SN, the source secondary base station connected to the terminal last time is determined as the target secondary base station, and then step S1c, step S1d, and step S1 are executed simultaneously; when step S1a determines that the UE needs to switch SN , The target SN can be determined according to the preset secondary base station selection strategy, and then only step S1 is performed without performing step S1c and step S1d.
  • Step S1c Send a resource maintenance request to the target secondary base station for the target secondary base station to maintain terminal resources.
  • Step S1d Send a second instance maintenance request to the terminal.
  • Step S1 Send a configuration information request to the target secondary base station.
  • step S1c, step S1d, and step S1 can be executed simultaneously.
  • the resource maintenance request and the configuration information request are sent together in the secondary node modification request instruction.
  • the source SN maintains the UE instance and uses the original configuration resource in response to the resource maintenance request, generates first configuration information, and feeds the first configuration information back to the MN through the secondary node modification response instruction.
  • the UE maintains the source SN instance and does not release the SCG, so as to reduce the SN secondary admission process during subsequent reconfiguration with the source SN and improve the success rate of dual connection configuration.
  • the second instance maintenance request may be sent through the SRB established between the UE and the MN.
  • the technical solution of the embodiment of the present disclosure maintains the UE instance unchanged and uses the original configured resources by controlling the source SN, so there is no need to perform back transmission, thereby reducing the service interruption delay.
  • reducing the SN secondary admission process can improve the success rate of dual-connection configuration.
  • step S1 is performed without performing step S1c and step S1d.
  • Step S2 Receive the first configuration information fed back by the target secondary base station.
  • Step S3 Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.
  • Fig. 4 is a flowchart of yet another dual connection re-establishment method provided by an embodiment of the disclosure. As shown in Fig. 4, the method not only includes the above steps S1 to S3, but also includes: step S01 and step S02.
  • Step S01 Receive the RRC connection re-establishment request instruction sent by the terminal.
  • the UE When the UE needs to perform dual connection reestablishment, it sends an RRC Connection Reestablishment Request (RRC Connection Reestablishment Request) instruction to the MN to be connected, and the RRC Connection Reestablishment Request instruction can be sent on SRB0.
  • RRC Connection Reestablishment Request RRC Connection Reestablishment Request
  • the MN to be connected may be the source MN that the UE was connected to last time, or it may be a non-source MN.
  • Step S02 Feed back the RRC connection re-establishment instruction to the terminal, so that the terminal can complete the RRC connection re-establishment with the primary base station.
  • the MN responds to the RRC connection re-establishment request instruction to verify whether it can re-establish itself with the UE; when the verification passes, the MN feeds back an RRC connection re-establishment (RRC Connection Reestablishment) instruction to the UE.
  • This command carries the packet data convergence protocol (Packet Data Convergence Protocol, referred to as PDCP), radio link control sublayer (Radio Link Control, referred to as RLC) that the UE can rebuild SRB1, update the security key, and can restore the command on SRB1 And other related content.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control sublayer
  • the UE After receiving the RRC connection re-establishment instruction, the UE completes the re-establishment procedure with the MN, and feeds back the RRC connection re-establishment completion instruction to the MN.
  • Step S1 Send a configuration information request to the target secondary base station.
  • Step S2 Receive the first configuration information fed back by the target secondary base station.
  • Step S3 Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.
  • Fig. 5 is a flowchart of yet another dual connection re-establishment method provided by an embodiment of the disclosure. As shown in Fig. 5, the method not only includes steps S1 to S3, but also includes steps S01, S02a, and S02.
  • Step S01 Receive the RRC connection re-establishment request instruction sent by the terminal.
  • the MN to be connected is a non-source MN. That is, the RRC connection re-establishment request instruction sent by the UE to the non-source MN.
  • Step S02a In response to the terminal's need to switch the primary base station, obtain the context information of the terminal from the source primary base station to which the terminal was connected last time.
  • the non-source MN can determine that the terminal needs to perform MN handover according to the relevant information recorded in the RRC connection re-establishment request instruction. At this time, the non-source MN obtains the context information of the UE from the source MN through the base station handover procedure based on the X2 interface;
  • the context information may include UE network capability information, authentication information, negotiated security algorithms, keys, created connection information, bearer information, and so on.
  • the non-source MN verifies whether it can re-establish with the UE according to the RRC connection re-establishment request instruction and the context information of the UE obtained from the source MN; when the verification passes, the RRC connection re-establishment instruction is fed back to the UE.
  • Step S02 Feed back the RRC connection re-establishment instruction to the terminal, so that the terminal can complete the RRC connection re-establishment with the primary base station.
  • Step S1 Send a configuration information request to the target secondary base station.
  • the target SN may be the source SN to which the UE was connected last time, or it may be a non-source MN.
  • Step S2 Receive the first configuration information fed back by the target secondary base station.
  • Step S3 Send the first configuration information and the second configuration information corresponding to the primary base station to the terminal.
  • FIG. 10 is a flowchart of a dual-connection re-establishment method according to an embodiment of the present disclosure.
  • the executor of the dual-connection re-establishment method is a terminal (UE), and the dual-connection re-establishment method includes:
  • Step S11 Send an RRC connection re-establishment completion instruction to the primary base station, so that the primary base station sends a configuration information request to the target secondary base station and receives the first configuration information fed back by the target secondary base station;
  • Step S12 receiving the first configuration information sent by the primary base station and the second configuration information corresponding to the primary base station;
  • Step S13 Complete the 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.
  • Fig. 6 is a signaling diagram for realizing dual connection re-establishment in an embodiment of the disclosure.
  • the MN is not switched and the SN is not switched; that is, the MN to which the UE is to be connected is the source MN ,
  • the target SN is the source SN.
  • it can correspond to the following scenarios:
  • the MN re-establishes to other cells of the source MN (cell handover in the MN station), and the signal quality of the source SN is better.
  • the UE sends an RRC connection re-establishment request instruction to the source MN.
  • the source MN sends an RRC connection re-establishment instruction to the UE.
  • the UE sends an RRC connection re-establishment completion instruction to the source MN.
  • the source MN sends a secondary node modification request instruction to the source SN, and the secondary node modification request instruction includes the first instance maintenance request and the configuration information request.
  • the source SN maintains the UE instance and newly allocates configuration resources.
  • the source SN sends a secondary node modification request response instruction to the source MN, and the secondary node modification request response instruction contains the first configuration information of the active SN.
  • 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 active SN and the second configuration information corresponding to the source MN.
  • 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.
  • FIG. 7 is a signaling diagram for realizing dual connection reconstruction in an embodiment of the disclosure. As shown in FIG. 7, the applicable scenario of FIG. 7 is the same as that in FIG. 6, and will not be repeated here.
  • the UE sends an RRC connection re-establishment request instruction to the source MN.
  • the source MN sends an RRC connection re-establishment instruction to the UE.
  • the UE sends an RRC connection re-establishment completion instruction to the source MN.
  • the source MN sends a secondary node modification request instruction to the source SN, and the secondary node modification request instruction includes a resource maintenance request and a configuration information request.
  • the source MN sends a second instance maintenance request to the UE for the UE to maintain the source SN instance without releasing the SCG.
  • the source SN maintains the UE instance and uses the original configured resources.
  • the source SN sends a secondary node modification request response instruction to the source MN, and the secondary node modification request response instruction contains the first configuration information of the active SN.
  • 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 active SN and the second configuration information corresponding to the source MN.
  • 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 (RRC Connection Reconfiguration Complete) instruction to the source MN.
  • RRC connection reconfiguration complete RRC Connection Reconfiguration Complete
  • Fig. 8 is a signaling diagram for realizing dual connection re-establishment in an embodiment of the disclosure.
  • the MN is switched but the SN is not switched; that is, the target MN to be connected by the UE is a non-source MN, the target SN is the source SN.
  • the target MN to be connected by the UE is a non-source MN
  • the target SN is the source SN.
  • it can correspond to the following scenarios:
  • the MN re-establishes to the cell of the non-source MN, and the non-source MN determines that the target SN is the source SN (for example, the scenario where the UE moves);
  • the source MN triggers a base station handover and sends a handover reconfiguration instruction to the UE.
  • the UE sends an RRC connection re-establishment request instruction to the non-source MN.
  • the non-source MN obtains the context information of the UE from the source MN through the base station handover procedure based on the X2 interface, and performs the corresponding verification procedure.
  • the non-source MN sends an RRC connection re-establishment instruction to the UE.
  • the UE sends an RRC connection re-establishment completion instruction to the non-source MN.
  • the non-source MN sends an auxiliary node addition request instruction to the source SN, and the auxiliary node addition request instruction includes a configuration information request.
  • the source SN creates a new instance and newly allocates configuration resources.
  • the source SN sends an auxiliary node addition request response instruction to the non-source MN, and the auxiliary node addition request response instruction includes the first configuration information of the active SN.
  • 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 active SN and the second configuration information corresponding to the non-source MN.
  • 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.
  • the embodiment of the present disclosure also provides a readable storage medium that stores a program, wherein when the program is executed, the steps in the dual connection reconstruction method provided in the foregoing embodiments are implemented.
  • the embodiment of the present disclosure also provides a base station, as shown in FIG. 9, including: one or more processors 91 and a memory 92, wherein one or more programs are stored in the memory 92; when one or more programs are When executed by the one or more processors 91, the one or more processors 91 implement the steps in the dual connection reconstruction method provided in the foregoing embodiment.
  • the embodiments of the present disclosure provide a dual connection re-establishment method, a readable storage medium, and a base station.
  • the MN sends a configuration information request to the target SN for the target SN to provide the corresponding first Configuration information, and then the first configuration information corresponding to the SN and the second configuration information corresponding to the MN are sent to the UE together, so that the UE can establish a connection with the MN and SN at one time, that is, the dual configuration information is configured at one time during the re-establishment process. Therefore, it can effectively reduce the time spent in the dual-connection reconstruction process, reduce the interruption delay, and ensure the user's throughput.
  • the target SN is the source SN that the UE was connected to last time
  • the service interruption delay can be further reduced and the success rate of dual connection configuration can be improved.
  • the functional modules/units in the device can be implemented as software, firmware, hardware, and appropriate combinations thereof.
  • the division between 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 consist of several physical components.
  • the components are executed cooperatively.
  • Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit .
  • Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium).
  • the term computer storage medium includes volatile and non-volatile data implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Sexual, removable and non-removable media.
  • Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or Any other medium used to store desired information and that can be accessed by a computer.
  • communication media usually contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery media. .

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Abstract

一种双连接重建方法、可读存储介质和基站，所述双连接重建方法应用于主基站侧，包括：响应于终端发送的RRC连接重建立完成指令，向目标辅基站发送配置信息请求（S1）；接收所述目标辅基站反馈的第一配置信息（S2）；将所述第一配置信息和所述主基站所对应的第二配置信息发送至所述终端，以供所述终端根据所述第一配置信息和所述第二配置信息完成与所述主基站、所述目标辅基站的RRC连接重配置（S3）。

Description

双连接重建方法、可读存储介质和基站
相关申请的交叉引用
本申请基于申请号为201911107547.0、申请日为2019年11月13日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本公开实施例涉及通信技术领域，特别涉及一种双连接重建方法、可读存储介质和基站。
背景技术
在双连接业务过程中，主基站(Master Node，简称MN)由于空口质量或者其他配置因素触发重建立，当前协议定义需要释放源辅基站(Secondary Node，简称SN)，且未明确说明重建立过程双连接配置处理流程；现有的双连接重建立配置过程需花费较长时间，中断时延较大。
此外，在相关的实现双连接重建立的过程中，辅基站(SN)的添加都是在主基站(MN)的小区恢复之后，重新按照MN中预设配置的辅基站策略添加相应SN。即，在主基站完成与终端(UE)之间的无线电资源控制(Radio Resource Control，简称RRC)连接重建立和重配置流程之后，再由MN通过一定辅基站选取策略确定出待连接的目标SN，然后向该目标SN请求相关相配信息，并将该目标SN的配置信息发送至终端，以供UE完成与目标SN的重配置，以实现双连接重建。
在实际应用中发现，上述双连接重建过程花费时间较长，中断时延较大，从而导致用户吞吐量的急剧下降。
发明内容
有鉴于此，本公开实施例提供了一种双连接重建方法、可读存储介质和基站。
第一方面，本公开实施例提供了一种双连接重建方法，应用于主基站侧，包括：响应于终端发送的无线电资源控制(Radio Resource Control，简称RRC)连接重建立完成指令，向目标辅基站发送配置信息请求；接收所述目标辅基站反馈的第一配置信息；将所述第一配置信息和所述主基站所对应的第二配置信息发送至所述终端，以供所述终端根据所述第一配置信息和所述第二配置信息完成与所述主基站和所述目标辅基站的RRC连接重配置。
第二方面，本公开实施例还提供了一种可读存储介质，存储有程序，其中，当所述程 序被执行时实现如前述实施例提供的方法中的步骤。
第三方面，本公开实施例还提供了一种基站，包括：一个或多个处理器；存储器，存储有一个或多个程序；其中，当所述一个或多个程序被所述一个或多个处理器执行时，使得所述一个或多个处理器实现如前述实施例提供的方法中的步骤。
第四方面，本公开实施例提供了一种双连接重建方法，应用于终端侧，包括：向主基站发送RRC连接重建立完成指令，以供所述主基站向目标辅基站发送配置信息请求并接收所述目标辅基站反馈的第一配置信息；接收所述主基站发送的所述第一配置信息和所述主基站所对应的第二配置信息；根据所述第一配置信息和所述第二配置信息完成与所述主基站和所述目标辅基站的RRC连接重配置。
附图说明
附图用来提供对本公开实施例的进一步理解，并且构成说明书的一部分，与本公开的实施例一起用于解释本公开，并不构成对本公开的限制。通过参考附图对一些详细实施例进行描述，以上和其他特征和优点对本领域技术人员将变得更加显而易见，在附图中：
图1为本公开实施例提供的一种双连接重建方法的流程图；
图2为本公开实施例提供的另一种双连接重建方法的流程图；
图3为本公开实施例提供的又一种双连接重建方法的流程图；
图4为本公开实施例提供的再一种双连接重建方法的流程图；
图5为本公开实施例提供的再一种双连接重建方法的流程图；
图6为本公开实施例中实现双连接重建的一种信令图；
图7为本公开实施例中实现双连接重建的一种信令图；
图8为本公开实施例中实现双连接重建的一种信令图；
图9为本公开实施例提供的一种基站的结构示意图；
图10为本公开实施例提供的一种双连接重建方法的流程图。
具体实施方式
为使本领域的技术人员更好地理解本公开的技术方案，下面结合附图对本公开实施例提供的一种双连接重建方法、可读存储介质和基站进行详细描述。
在下文中将参考附图更充分地描述本公开的一些实施例，但是所述实施例可以以不同形式来体现且不应当被解释为限于本文阐述的实施例。反之，提供这些实施例的目的在于使本公开透彻和完整，并将使本领域技术人员充分理解本公开的范围。
本文所使用的术语仅用于描述特定实施例，且不意欲限制本公开。如本文所使用的，单数形式“一个”和“该”也意欲包括复数形式，除非上下文另外清楚指出。还将理解的 是，当本说明书中使用术语“包括”和/或“由……制成”时，指定存在所述特征、整体、步骤和/或操作，但不排除存在或添加一个或多个其他特征、整体、步骤和/或操作。
将理解的是，虽然本文可以使用术语第一、第二等来描述各种元件，但这些元件不应当受限于这些术语，这些术语仅用于区分一个对象和另一对象。
除非另外限定，否则本文所用的所有术语(包括技术和科学术语)的含义与本领域普通技术人员通常理解的含义相同。还将理解，诸如那些在常用字典中限定的那些术语应当被解释为具有与其在相关领域以及本公开的背景下的含义一致的含义，且将不解释为具有理想化或过度形式上的含义，除非本文明确如此限定。
在相关的实现双连接重建立的过程中，辅基站(SN)的添加都是在主基站(MN)的小区恢复之后，重新按照MN中预设配置的辅基站策略添加相应SN。即，在主基站完成与终端(UE)之间的无线电资源控制(Radio Resource Control，简称RRC)连接重建立和重配置流程之后，再由MN通过一定辅基站选取策略确定出待连接的目标SN，然后向该目标SN请求相关相配信息，并将该目标SN的配置信息发送至终端，以供UE完成与目标SN的重配置，以实现双连接重建。
其中，“重建立”具体是指：建立UE与基站之间的指令承载(Signalling Radio Bearers，简称SRB)；“重配置”具体是指：配置UE与基站之间的数据承载。
在实际应用中发现，上述双连接重建过程花费时间较长，中断时延较大，从而导致用户吞吐量的急剧下降。有鉴于此，本公开实施例提供了一种双连接重建方法。
图1为本公开实施例提供的一种双连接重建方法的流程图，如图1所示，该双连接重建方法的执行主体为在进行双连接重建时UE所连接的MN，该MN可为UE上一次所连接的源MN，也可能是非源MN；另外，在进行双连接重建时UE所连接的目标SN可能为UE上一次所连接的源SN，也可能是非源MN。具体应用场景将在后续进行详细描述。该双连接重建方法包括：
步骤S1、响应于发送的RRC连接重建立完成指令，向目标辅基站发送配置信息请求。
在UE完成与MN的RRC连接重建立之后，UE会向MN发送RRC连接重建立完成(RRC Connection Reestablishment Complete)指令，以告知MN其与UE之间完成了RRC连接重建立流程。
与相关方法中不同的是，在本公开实施例中，当MN接收到RRC连接重建立完成指令时，MN不再立即触发将自身的配置信息发送至UE以进行重配置流程，而是向目标SN发送配置信息请求，以供目标SN提供相应的配置信息。
在一些实施例中，当执行主体为源MN(MN未发生切换)且目标SN为源SN(SN 未发生切换)时，配置信息请求在辅节点修改请求(SN Modification Request，也称为辅基站节点修改请求)指令中被发送。
在一些实施例中，当执行主体不为源MN(MN发生切换)或目标SN不为源SN(SN发生切换)时，配置信息请求在辅节点添加请求(SN Addition Request，也称为辅基站节点添加请求)指令中被发送。
步骤S2、接收目标辅基站反馈的第一配置信息。
其中，该第一配置信息包括针对UE与该目标SN之间的接入过程所需要的目标SN的配置参数；例如，辅小区组(Secondary Cell Group，简称SCG)配置、以太网芯片(包括太网媒体接入控制器MAC和物理接口收发器PHY)配置细节等。
在一些实施例中，当配置信息请求在辅节点修改请求指令中被发送时，则第一配置信息在辅节点修改响应(SN Modification Response)指令中被发送反馈至MN。
在一些实施例中，当配置信息请求在辅节点添加请求指令中被发送，则第一配置信息在辅节点添加响应(SN Addition Response)指令中被发送反馈至MN。
步骤S3、将第一配置信息和主基站所对应的第二配置信息发送至终端。
其中，MN所对应的第二配置信息包括针对UE与该MN之间的重配置过程所需要的MN的配置参数；例如，主小区组(Master Cell Group，简称MCG)配置、以太网芯片配置细节等。
MN将通过步骤S2所接收到的第一配置信息以及自身所对应的第二配置信息发送至终端，以供UE根据第一配置信息完成与目标SN的重配置，以及根据第二配置信息完成与MN的重配置，从而完成UE与MN和SN的双连接。需要说明的是，根据MN或SN的配置信息完成与MN或SN进行重配置的具体过程，属于本领域的常规技术，此处不进行详细描述。
在一些实施例中，第一配置信息和第二配置信息在RRC连接重配置(RRC Connection Reconfiguration)指令中被发送。
在本公开实施例中，当MN接收到RRC连接重建立完成指令时，MN向目标SN发送配置信息请求以供目标SN提供相应的第一配置信息，然后将SN所对应的第一配置信息以及MN所对应的第二配置信息一起发送至UE，以供UE一次性与MN和SN建立连接，即在重建立过程中一次性配置了双连接，因而可有效减少双连接重建过程所花费的时间，减小中断时延，保障用户的吞吐量。
图2为本公开实施例提供的另一种双连接重建方法的流程图，如图2所示，该方法不但包括上述步骤S1～步骤S3，还包括：步骤S1a以及步骤S1b。其中，步骤S1a位于步骤 S1之前执行，步骤S1b可以与步骤S1同时执行。
步骤S1a、判断终端是否需要切换辅基站。
在一些场景中，MN触发双连接重建立业务主要可能原因有MN配置不支持，或者MN小区下行空口信号质量差。由于MN和SN站点小区频段覆盖差异性，因此在MN小区信号质量差的情况下，SN小区信号质量未必差。此时，MN触发重建立需要考虑SN的状态处理。另外，由于终端移动因素，MN重建立可能在源MN的源小区，或者在源MN的其他小区重建立，在多数情况下NR和UE之间是维持良好连接的，否则的话UE会上报NR SCG Failure指示给MN。
针对上述场景，MN可基于预定义判断策略来判断UE是否需要切换SN。例如，若源NR小区信号质量较佳，则无需切换SN；若源SN小区信号质量较差(UE上报NR SCG Failure)，则需要切换SN。需要说明的是，对于判断UE是否需要切换SN所采用的判断策略可以根据实际需要来进行预设设定、调整，本公开对此不作限定。
当步骤S1a判断出UE不需要切换SN时，则确定终端上一次所连接的源辅基站作为目标辅基站，此后同时执行步骤S1b和步骤S1；当步骤S1a判断出UE需要切换SN时，则可以根据预先设定的辅基站选取策略来确定出目标SN，此后仅执行步骤S1而不执行步骤S1b。
步骤S1b、向目标辅基站发送第一实例维持请求。
步骤S1、向目标辅基站发送配置信息请求。
在确定出目标SN为源SN后，可同步执行步骤S1b和步骤S1。在一些实施例中，第一实例维持请求和配置信息请求在辅节点修改请求指令中一起被发送。源SN接收到辅节点修改请求指令后，响应于第一实例维持请求，维持UE实例并新配配置，生成第一配置信息，并将第一配置信息通过辅节点修改响应指令反馈至MN。
针对SN不变的场景，本公开实施例的技术方案通过控制源SN维持UE实例不变，因而不用进行反传，从而能减小业务中断时延。
在确定出目标SN不为源SN后，仅执行步骤S1而不执行步骤S1b。在一些实施例中，配置信息请求在辅节点修改请求指令中被发送；此时，辅节点修改请求指令中不包括第一实例维持请求。目标SN接收到辅节点修改请求指令后，新建UE实例并新配配置，生成第一配置信息，并将第一配置信息通过辅节点修改响应指令反馈至MN。
步骤S2、接收目标辅基站反馈的第一配置信息。
步骤S3、将第一配置信息和主基站所对应的第二配置信息发送至终端。
图3为本公开实施例提供的又一种双连接重建方法的流程图，如图3所示，该方法不 但包括上述步骤S1～步骤S3，还包括：步骤S1a以及步骤S1c。其中，步骤S1a位于步骤S1之前执行，步骤S1c可以与步骤S1同时执行。
步骤S1a、判断终端是否需要切换辅基站。
当步骤S1a判断出UE不需要切换SN时，则确定终端上一次所连接的源辅基站作为目标辅基站，此后同时执行步骤S1c、步骤S1d和步骤S1；当步骤S1a判断出UE需要切换SN时，则可以根据预先设定的辅基站选取策略来确定出目标SN，此后仅执行步骤S1而不执行步骤S1c和步骤S1d。
步骤S1c、向目标辅基站发送资源维持请求，以供目标辅基站维持终端资源。
步骤S1d、向终端发送第二实例维持请求。
步骤S1、向目标辅基站发送配置信息请求。
在确定出目标SN为源SN后，可同步执行步骤S1c、步骤S1d和步骤S1。在一些实施例中，资源维持请求和配置信息请求在辅节点修改请求指令中一起被发送。源SN接收到辅节点修改请求指令后，响应于资源维持请求，维持UE实例并使用原配置资源，生成第一配置信息，并将第一配置信息通过辅节点修改响应指令反馈至MN。UE响应于MN所发送的第二实例维持请求，维持源SN实例，不释放SCG，以供后续在与源SN进行重配置时减少SN二次接纳过程，提高双连接配置成功率。
需要说明的是，第二实例维持请求可通过UE与MN之间所建立的SRB进行发送。
针对SN不变的场景，本公开实施例的技术方案通过控制源SN维持UE实例不变且使用原配置资源，因而不用进行反传，从而能减少业务中断时延。与此同时，减少SN二次接纳过程，可提高双连接配置成功率。
在确定出目标SN不为源SN后，仅执行步骤S1而不执行步骤S1c和步骤S1d。
步骤S2、接收目标辅基站反馈的第一配置信息。
步骤S3、将第一配置信息和主基站所对应的第二配置信息发送至终端。
图4为本公开实施例提供的再一种双连接重建方法的流程图，如图4所示，该方法不但包括上述步骤S1～步骤S3，还包括：步骤S01和步骤S02。
步骤S01、接收终端发送的RRC连接重建立请求指令。
在UE需要进行双连接重建时，其会向待连接的MN发送RRC连接重建立请求(RRC Connection Reestablishment Request)指令，该RRC连接重建立请求指令可在SRB0上发送。其中，该待连接的MN可能为UE上一次所连接的源MN，也可能是非源MN。
步骤S02、向终端反馈RRC连接重建立指令，以供终端完成与主基站的RRC连接重建立。
MN响应于RRC连接重建立请求指令，验证自身是否可以与UE进行重建立；当验证通过时，向UE反馈RRC连接重建立(RRC Connection Reestablishment)指令。该指令携带有UE可以重建SRB1的分组数据汇聚协议(Packet Data Convergence Protocol，简称PDCP)、无线链路控制子层(Radio Link Control，简称RLC)，更新安全密钥，并且可以在SRB1上恢复指令等相关内容。
UE接收到RRC连接重建立指令后，完成与MN的重建立流程，并向MN反馈RRC连接重建立完成指令。
步骤S1、向目标辅基站发送配置信息请求。
步骤S2、接收目标辅基站反馈的第一配置信息。
步骤S3、将第一配置信息和主基站所对应的第二配置信息发送至终端。
图5为本公开实施例提供的再一种双连接重建方法的流程图，如图5所示，该方法不但包括上述步骤S1～步骤S3，还包括：步骤S01、S02a和步骤S02。
步骤S01、接收终端发送的RRC连接重建立请求指令。
在本实施例中，待连接的MN为非源MN。即UE向非源MN发送的RRC连接重建立请求指令。
步骤S02a、响应于终端需进行主基站的切换，从终端上一次所连接的源主基站获取终端的上下文信息。
该非源MN根据RRC连接重建立请求指令所记载的相关信息可确定出终端需进行MN的切换，此时非源MN基于X2接口通过基站切换流程从源MN处获取该UE的上下文信息；该上下文信息可以包括UE的网络能力信息、鉴权信息、协商的安全算法、密钥、创建的连接信息、承载信息等。
该非源MN根据RRC连接重建立请求指令和从源MN处获取到UE的上下文信息，验证自身是否可以与UE进行重建立；当验证通过时，则向UE反馈RRC连接重建立指令。
步骤S02、向终端反馈RRC连接重建立指令，以供终端完成与主基站的RRC连接重建立。
步骤S1、向目标辅基站发送配置信息请求。
需要说明的是，目标SN可能为UE上一次所连接的源SN，也可能是非源MN。
步骤S2、接收目标辅基站反馈的第一配置信息。
步骤S3、将第一配置信息和主基站所对应的第二配置信息发送至终端。
图10为本公开实施例提供的一种双连接重建方法的流程图，如图10所示，该双连接重建方法的执行主体为终端(UE)，该双连接重建方法包括：
步骤S11、向主基站发送RRC连接重建立完成指令，以供所述主基站向目标辅基站发送配置信息请求并接收所述目标辅基站反馈的第一配置信息；
步骤S12、接收所述主基站发送的所述第一配置信息和所述主基站所对应的第二配置信息；
步骤S13、根据所述第一配置信息和所述第二配置信息完成与所述主基站和所述目标辅基站的RRC连接重配置。
需要说明的是，上述各实施例中不同的步骤之间可以相互组合以得到新技术方案，该组合出的新技术方案也属于本公开的保护范围。
下面将对适用于本公开的一些实施例技术方案的几个场景进行描述，其不会对本公开的技术方案产生限制。
图6为本公开实施例中实现双连接重建的一种信令图，如图6所示，在该双连接重建场景中，MN未切换且SN未切换；即UE待连接的MN为源MN，目标SN为源SN。具体地可对应如下场景：
1)MN重建立到源MN的源小区，且源SN的信号质量较佳。
2)MN重建立到源MN的其他小区(MN站内小区切换)，且源SN的信号质量较佳。
具体流程如下：
A1.UE向源MN发送RRC连接重建立请求指令。
A2.源MN向UE发送RRC连接重建立指令。
A3.UE向源MN发送RRC连接重建立完成指令。
A4.源MN向源SN发送辅节点修改请求指令，辅节点修改请求指令中包含有第一实例维持请求和配置信息请求。
A5.源SN维持UE实例且新配配置资源。
A6.源SN向源MN发送辅节点修改请求响应指令，辅节点修改请求响应指令中包含有源SN的第一配置信息。
A7.源MN向UE发送RRC连接重配置指令，RRC连接重配置指令中包含有源SN所对应的第一配置信息和源MN所对应的第二配置信息。
A8.UE根据第一配置信息和第二配置信息完成与源SN和源MN的重配置，并向源MN发送RRC连接重配置完成(RRC Connection Reconfiguration Complete)指令。
图7为本公开实施例中实现双连接重建的一种信令图，如图7所示，图7所适用场景与图6中相同，此处不在赘述。
具体流程如下：
B1.UE向源MN发送RRC连接重建立请求指令。
B2.源MN向UE发送RRC连接重建立指令。
B3.UE向源MN发送RRC连接重建立完成指令。
B4.源MN向源SN发送辅节点修改请求指令，辅节点修改请求指令中包含有资源维持请求和配置信息请求。
B5.源MN向UE发送第二实例维持请求，以供UE维持源SN实例，不释放SCG。
B6.源SN维持UE实例且使用原配置资源。
B7.源SN向源MN发送辅节点修改请求响应指令，辅节点修改请求响应指令中包含有源SN的第一配置信息。
B8.源MN向UE发送RRC连接重配置指令，RRC连接重配置指令中包含有源SN所对应的第一配置信息和源MN所对应的第二配置信息。
B9.UE根据第一配置信息和第二配置信息完成与源SN和源MN的重配置，并向源MN发送RRC连接重配置完成(RRC Connection Reconfiguration Complete)指令。
图8为本公开实施例中实现双连接重建的一种信令图，如图8所示，在该双连接重建场景中，MN切换但SN未切换；即UE待连接的目标MN为非源MN，目标SN为源SN。具体地可对应如下场景：
1)MN重建立到非源MN的小区，且非源MN确定目标SN为源SN(例如UE移动的场景)；
具体流程如下：
C1.源MN触发基站切换，向UE发送切换重配指令。
C2.UE向非源MN发送RRC连接重建立请求指令。
C3.非源MN基于X2接口通过基站切换流程从源MN处获取该UE的上下文信息，并进行相应验证流程。
C4.非源MN向UE发送RRC连接重建立指令。
C5.UE向非源MN发送RRC连接重建立完成指令。
C6.非源MN向源SN发送辅节点添加请求指令，辅节点添加请求指令中包含有配置信息请求。
C7.在辅节点添加请求指令中未包含第二实例维持请求和资源维持请求的情况下，源SN新建实例并新配配置资源。
C8.源SN向非源MN发送辅节点添加请求响应指令，辅节点添加请求响应指令中包含有源SN的第一配置信息。
C9.源MN向UE发送RRC连接重配置指令，RRC连接重配置指令中包含有源SN所对应的第一配置信息和非源MN所对应的第二配置信息。
C10.UE根据第一配置信息和第二配置信息完成与源SN和非源MN的重配置，并向源MN发送RRC连接重配置完成指令。
对于本公开实施例技术方案所适用的其他应用场景此处不再一一举例描述。
本公开实施例还提供了一种可读存储介质，存储有程序，其中，当程序被执行时实现如前述实施例所提供的双连接重建方法中的步骤。
本公开实施例还提供了一种基站，如图9所示，包括：一个或多个处理器91以及存储器92，其中，存储器92上存储有一个或多个程序；当一个或多个程序被一个或多个处理器91执行时，使得一个或多个处理器91实现如前述实施例所提供的双连接重建方法中的步骤。
本公开实施例提供了一种双连接重建方法、可读存储介质和基站，通过在终端完成与主基站的RRC连接重建立时，MN向目标SN发送配置信息请求以供目标SN提供相应的第一配置信息，然后将SN所对应的第一配置信息以及MN所对应的第二配置信息一起发送至UE，以供UE一次性与MN和SN建立连接，即在重建立过程中一次性配置了双连接，因而可有效减少双连接重建过程所花费的时间，减小中断时延，保障用户的吞吐量。
另外，当目标SN为UE上一次所连接的源SN时，通过向源SN发送请求以控制SN维持UE实例或原配置资源，可进一步减小业务中断时延，以及提高双连接配置成功率。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介 质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
本文已经公开了一些实施例，并且虽然采用了具体术语，但它们仅用于并仅应当被解释为一般说明性含义，并且不用于限制的目的。在一些实例中，对本领域技术人员显而易见的是，除非另外明确指出，否则可单独使用与特定实施例相结合描述的特征、特性和/或元素，或可与其他实施例相结合描述的特征、特性和/或元件组合使用。因此，本领域技术人员将理解，在不脱离由所附的权利要求阐明的本公开的范围的情况下，可进行各种形式和细节上的改变。

Claims (13)

  1. 一种双连接重建方法，应用于主基站侧，包括：
    响应于终端发送的RRC连接重建立完成指令，向目标辅基站发送配置信息请求；
    接收所述目标辅基站反馈的第一配置信息；
    将所述第一配置信息和所述主基站所对应的第二配置信息发送至所述终端，以供所述终端根据所述第一配置信息和所述第二配置信息完成与所述主基站和所述目标辅基站的RRC连接重配置。
  2. 根据权利要求1所述的方法，其中，所述配置信息请求在辅节点修改请求指令中被发送；
    或者，所述配置信息请求在辅节点添加请求指令中被发送。
  3. 根据权利要求1所述的方法，其中，所述第一配置信息和所述第二配置信息在RRC连接重配置指令中被发送。
  4. 根据权利要求1所述的方法，在所述向目标辅基站发送配置信息请求的步骤之前，还包括：
    在所述终端不需要切换辅基站时，确定所述终端上一次所连接的源辅基站作为所述目标辅基站。
  5. 根据权利要求4所述的方法，其中，当所述源辅基站作为所述目标辅基站时，所述向目标辅基站发送配置信息请求的步骤包括：
    向所述目标辅基站发送配置信息请求和第一实例维持请求，以供所述目标辅基站反馈第一配置信息并维持终端实例。
  6. 根据权利要求5所述的方法，其中，所述第一实例维持请求在辅节点修改请求指令中被发送。
  7. 根据权利要求4所述的方法，其中，当所述源辅基站作为所述目标辅基站时，所述向目标辅基站发送配置信息请求的步骤包括：
    向所述目标辅基站发送配置信息请求和资源维持请求，以供所述目标辅基站反馈第一配置信息并维持终端资源；
    在所述将所述第一配置信息和所述主基站所对应的第二配置信息发送至所述终端的步骤之前，还包括：
    向所述终端发送第二实例维持请求，以供所述终端维持源辅基站实例。
  8. 根据权利要求7所述的方法，其中，所述资源维持请求在辅节点修改请求指令中被发送。
  9. 根据权利要求1-8中任一所述的方法，在所述向目标辅基站发送配置信息请求的步骤之前，还包括：
    接收所述终端发送的RRC连接重建立请求指令；
    向所述终端反馈RRC连接重建立指令，以供所述终端完成与主基站的RRC连接重建立。
  10. 根据权利要求9所述的方法，在所述接收所述终端发送的RRC连接重建立请求指令的步骤之后，且在所述向所述终端反馈RRC连接重建立指令的步骤之前，还包括：
    响应于所述终端需进行主基站的切换，从所述终端上一次所连接的源主基站获取所述终端的上下文信息。
  11. 一种可读存储介质，存储有程序，其中，当所述程序被执行时实现如权利要求1-10中任一所述的方法中的步骤。
  12. 一种基站，包括：
    一个或多个处理器；
    存储器，存储有一个或多个程序；其中，
    当所述一个或多个程序被所述一个或多个处理器执行时，使得所述一个或多个处理器实现如权利要求1-10中任一所述的方法中的步骤。
  13. 一种双连接重建方法，应用于终端侧，包括：
    向主基站发送RRC连接重建立完成指令，以供所述主基站向目标辅基站发送配置信息请求并接收所述目标辅基站反馈的第一配置信息；
    接收所述主基站发送的所述第一配置信息和所述主基站所对应的第二配置信息；
    根据所述第一配置信息和所述第二配置信息完成与所述主基站和所述目标辅基站的RRC连接重配置。
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