WO2019129252A1 - 一种通知执行pdcp数据恢复的方法及设备 - Google Patents

一种通知执行pdcp数据恢复的方法及设备 Download PDF

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Publication number
WO2019129252A1
WO2019129252A1 PCT/CN2018/125092 CN2018125092W WO2019129252A1 WO 2019129252 A1 WO2019129252 A1 WO 2019129252A1 CN 2018125092 W CN2018125092 W CN 2018125092W WO 2019129252 A1 WO2019129252 A1 WO 2019129252A1
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WIPO (PCT)
Prior art keywords
base station
secondary base
data recovery
pdcp data
inter
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PCT/CN2018/125092
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English (en)
French (fr)
Inventor
许萌
陈瑞卡
梁靖
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority to US16/958,705 priority Critical patent/US11558925B2/en
Priority to JP2020536192A priority patent/JP7146922B2/ja
Priority to KR1020207022008A priority patent/KR102347905B1/ko
Priority to EP18893983.9A priority patent/EP3734870B1/en
Publication of WO2019129252A1 publication Critical patent/WO2019129252A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • 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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H04W12/043—Key management, e.g. using generic bootstrapping architecture [GBA] using a trusted network node as an anchor
    • H04W12/0433—Key management protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H04W36/0038—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of security context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/50—Service provisioning or reconfiguring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/002—Mutual synchronization
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
    • 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
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points
    • 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
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and device for notifying the execution of PDCP data recovery.
  • a user equipment can simultaneously connect two Radio Access Network (RAN) nodes for which communication services are provided, one of which is a RAN node.
  • the primary base station (MN) and the other are secondary nodes (SNs).
  • the MN can generate the wireless configuration information of the MN end
  • the SN can generate the wireless configuration information of the SN end
  • the MN and the SN can both include multiple cells (Cells) to provide services for the UE, and one of the multiple cells is the primary cell (Primary) Cell, PCell), and the rest are secondary cells (SCell).
  • Cells multiple cells
  • the SN When the SN is configured to provide services for the UE, if the MN has a primary cell (Intra-MN) handover in the MN, or the primary cell in the central unit (CU) of the radio access network (intra-CU) The handover process, since the MN or CU has not changed, the location of the Packet Data Convergence Protocol (PDCP) has not changed, so the security key cannot be updated, and the corresponding PDCP reconstruction process does not need to be performed. However, the MN needs to perform the PDCP data recovery process and the corresponding underlying synchronization reconfiguration process. In the dual connectivity scenario, the SN also provides a data transmission process for the user.
  • Intra-MN the MN has a primary cell
  • CU central unit
  • intra-CU radio access network
  • the SN side also needs to perform a PDCP data recovery procedure, but for the Intra-MN or intra-CU handover, the MN node can know The PDCP data recovery process needs to be performed, but the SN is not known.
  • the embodiment of the invention provides a method and a device for notifying the SN to perform a PDCP data recovery process.
  • a method for notifying execution of a packet data convergence layer protocol PDCP data recovery comprising:
  • the primary base station sends an inter-node signaling message between the primary base station and the secondary base station to the secondary base station to notify the secondary base station to perform a PDCP data recovery process, where the inter-node signaling message is used to indicate The secondary base station performs a PDCP data recovery procedure.
  • the method further includes:
  • the primary base station triggers an intra-MN handover procedure in the primary base station or an intra-CU handover procedure in the same manner as the primary cell in the central access node of the radio access network, and the primary base station determines to keep the secondary base station unchanged and not A security key update is required.
  • the inter-node signaling message carries indication information, where the indication information is encoded by an encoding format of an X2/Xn AP message, or is encoded by an encoding format of an RRC message; wherein the indication information is used for Instructing the secondary base station to perform the PDCP data recovery procedure.
  • the method further includes:
  • the primary base station carries the indication information by using the newly defined first field in the inter-node signaling message, where the indication information is used to instruct the secondary base station to perform a PDCP data recovery process, where the first field is optional.
  • the primary base station carries the indication information by multiplexing a second field in the inter-node signaling message, where the second field includes at least two coding forms, and different coding forms are used to carry different information. And one of the at least two coding forms is used to carry the indication information.
  • the inter-node signaling is performed.
  • the message is a secondary base station modification request message in the secondary base station modification process initiated by the primary base station.
  • the second field is multiplexed with a PDCP change indication for notifying the secondary base station to perform a security key update, where the PDCP change indication is used to indicate that the secondary base station performs
  • the coding form when the PDCP data is recovered is different from the coding form used to indicate that the secondary base station performs the security key update.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the secondary base station is configured to determine, according to the synchronous reconfiguration request, whether to perform the PDCP data recovery process, where the synchronization reconfiguration is performed.
  • the request does not carry the updated security key, or does not carry the information indicating that the secondary base station performs security key update, and the secondary base station can determine to perform the PDCP data recovery process.
  • the inter-node signaling message is further used to instruct the secondary base station to perform an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the bottom synchronization reconfiguration process includes radio link control.
  • RLC radio link control
  • a method for performing packet data convergence layer protocol PDCP data recovery comprising:
  • the secondary base station receives the inter-node signaling message sent by the primary base station, where the inter-node signaling message is used to instruct the secondary base station to perform a PDCP data recovery process;
  • the secondary base station performs the PDCP data recovery process according to the inter-node signaling message.
  • the inter-node signaling message carries the indication information by using the newly defined first field, where the indication information is used to indicate that the secondary base station performs a PDCP data recovery process, where the first field is an optional attribute. Or choose the field of the attribute; or,
  • the inter-node signaling message carries the indication information by using a multiplexed second field, where the second field includes at least two coding forms, and different coding forms are used to carry different information, the at least two One of the coding forms is used to carry the indication information.
  • the method before the performing, by the secondary base station, the PDCP data recovery process according to the inter-node signaling message, the method further includes:
  • the secondary base station determines to perform the PDCP data recovery process.
  • the method further includes:
  • the secondary base station determines that the PDCP change indication has a valid value for indicating that the secondary base station performs the PDCP data recovery procedure, the secondary base station determines to perform the PDCP data recovery process; or
  • the secondary base station determines that the PDCP change indication has a valid value for indicating that the secondary base station performs a security key update procedure, the secondary base station determines to perform the security key update procedure.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request, and the method further includes:
  • the secondary base station Determining, by the secondary base station, whether to perform the PDCP data recovery process according to the synchronous reconfiguration request; wherein, if the synchronous reconfiguration request does not carry the updated security key, or does not carry the indication, the secondary base station performs The security key update information, the secondary base station can determine to perform the PDCP data recovery process;
  • the secondary base station determines to perform the PDCP data recovery procedure.
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the method further includes:
  • the secondary base station determines to perform the bottom synchronization reconfiguration process according to the inter-node signaling message.
  • the bottom synchronization reconfiguration process includes one of an RLC entity re-establishment process, a MAC entity reset process, and a random access process. Or multiple processes.
  • a base station is provided, the base station being a primary base station in a dual-connected and multi-connected communication system, including:
  • a memory for storing instructions
  • the transceiver is configured to send data under the control of the processor.
  • the processor is further configured to send, by using a transceiver, an inter-node signaling message between the primary base station and the secondary base station to the secondary base station, to notify the secondary base station to perform a PDCP data recovery process.
  • a transceiver an inter-node signaling message between the primary base station and the secondary base station to the secondary base station.
  • the primary cell handover intra-MN handover procedure in the primary base station or the primary cell handover intra-CU handover procedure in the radio access network central node is triggered, and it is determined that the secondary base station remains unchanged and the security key is not required. Update.
  • the inter-node signaling message carries indication information, where the indication information is encoded by an encoding format of an X2/Xn AP message, or encoded by an encoding format of a radio resource control RRC message; wherein the indication The information is used to instruct the secondary base station to perform the PDCP data recovery process.
  • the processor is further configured to:
  • the first field that is newly defined in the inter-node signaling message carries the indication information, where the indication information is used to indicate that the secondary base station performs a PDCP data recovery process, where the first field is an optional attribute or a candidate The field of the attribute; or,
  • the indication information transmitting, by the second field in the inter-node signaling message, the indication information, where the second field includes at least two coding forms, and different coding forms are used to carry different information, where the at least One of the two coding forms is used to carry the indication information.
  • the inter-node signaling message is used in the secondary base station modification process initiated by the primary base station.
  • the base station modifies the request message.
  • the second field multiplexes a PDCP change indication for notifying the secondary base station to perform a security key update, where the PDCP change indication is used to indicate that the secondary base station performs PDCP data recovery.
  • the form is different from the coding form used to indicate that the secondary base station performs security key update.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the secondary base station is configured to determine, according to the synchronous reconfiguration request, whether to perform the PDCP data recovery process, where the synchronization reconfiguration is performed.
  • the request does not carry the updated security key, or does not carry the information indicating that the secondary base station performs security key update, and the secondary base station can determine to perform the PDCP data recovery process.
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the bottom synchronization reconfiguration process includes an RLC entity re-establishment process. , MAC entity reset process and one or more processes in the random access process.
  • a base station where the base station is a secondary base station in a dual-connected and multi-connected communication system, including:
  • a memory for storing instructions
  • the transceiver is configured to receive data under the control of the processor.
  • the inter-node signaling message carries the indication information by using the newly defined first field, where the indication information is used to indicate that the secondary base station performs a PDCP data recovery process, where the first field is an optional attribute. Or choose the field of the attribute; or,
  • the inter-node signaling message carries the indication information by using a multiplexed second field, where the second field includes at least two coding forms, and different coding forms are used to carry different information, the at least two One of the coding forms is used to carry the indication information.
  • the processor is further configured to:
  • the processor Before determining, by the processor, the PDCP data recovery process according to the inter-node signaling message, determining whether the first field has a valid value for indicating that the secondary base station performs the PDCP data recovery process; or Determining whether the second field has a valid value for indicating that the secondary base station performs the PDCP data recovery process;
  • the processor is further configured to:
  • the PDCP change indication has a valid value for instructing the secondary base station to perform the PDCP data recovery process, determining to perform the PDCP data recovery process;
  • the PDCP change indication has a valid value for instructing the secondary base station to perform a security key update procedure, it is determined to perform the security key update procedure.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the processor is further configured to:
  • the processor can determine to perform the PDCP data recovery process;
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the processor is further configured to:
  • the bottom synchronization reconfiguration process includes one or more processes in an RLC entity re-establishment process, a MAC entity reset process, and a random access process .
  • a base station being a primary base station in a dual connectivity and multi-connection communication system, the primary base station comprising:
  • a sending unit configured to send an inter-node signaling message between the primary base station and the secondary base station to the secondary base station, to notify the secondary base station to perform a PDCP data recovery process, where the inter-node signaling message is used by Instructing the secondary base station to perform a PDCP data recovery process.
  • the primary base station further includes a determining unit
  • the determining unit is configured to trigger a primary cell handover intra-MN handover procedure in the primary base station or an intra-CU handover procedure in the same manner as the primary cell in the radio access network central node, and determine that the secondary base station remains unchanged and does not need to be secure. Update of the key.
  • the inter-node signaling message carries indication information, where the indication information is encoded by an encoding format of an X2/Xn AP message, or is encoded by an encoding format of an RRC message; wherein the indication information is used for Instructing the secondary base station to perform the PDCP data recovery procedure.
  • the primary base station carries the indication information by using the newly defined first field in the inter-node signaling message, where the indication information is used to instruct the secondary base station to perform a PDCP data recovery process, where the first The field is an optional attribute or a field of the attribute selected; or,
  • the primary base station carries the indication information by multiplexing a second field in the inter-node signaling message, where the second field includes at least two coding forms, and different coding forms are used to carry different information. And one of the at least two coding forms is used to carry the indication information.
  • the inter-node signaling message is used in the secondary base station modification process initiated by the primary base station.
  • the base station modifies the request message.
  • the second field multiplexes a PDCP change indication for notifying the secondary base station to perform a security key update, where the PDCP change indication is used to indicate that the secondary base station performs PDCP data recovery.
  • the form is different from the coding form used to indicate that the secondary base station performs security key update.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the secondary base station is configured to determine, according to the synchronous reconfiguration request, whether to perform the PDCP data recovery process, where the synchronization reconfiguration is performed.
  • the request does not carry the updated security key, or does not carry the information indicating that the secondary base station performs security key update, and the secondary base station can determine to perform the PDCP data recovery process.
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the bottom synchronization reconfiguration process includes an RLC entity re-establishment process. , MAC entity reset process and one or more processes in the random access process.
  • a base station is provided, where the base station is a secondary base station in a dual-connected and multi-connected communication system, and the secondary base station includes:
  • a receiving unit configured to receive an inter-node signaling message sent by the primary base station, where the inter-node signaling message is used to instruct the secondary base station to perform a PDCP data recovery process
  • an executing unit configured to execute the PDCP data recovery process according to the inter-node signaling message.
  • the inter-node signaling message carries the indication information by using the newly defined first field, where the indication information is used to indicate that the secondary base station performs a PDCP data recovery process, where the first field is an optional attribute. Or choose the field of the attribute; or,
  • the inter-node signaling message carries the indication information by using a multiplexed second field, where the second field includes at least two coding forms, and different coding forms are used to carry different information, the at least two One of the coding forms is used to carry the indication information.
  • the secondary base station further includes a second determining unit
  • the determining unit is configured to determine whether the first field has a valid value for indicating that the secondary base station performs the PDCP data recovery process, or determine whether the second field exists to indicate the secondary base station Performing a valid value of the PDCP data recovery process;
  • the determining unit is further configured to: if the determination result is yes, determine to perform the PDCP data recovery process.
  • the second field is multiplexed to notify the secondary base station to perform a security key update
  • the PDCP change indication is used to indicate that the secondary base station performs a PDCP data recovery process.
  • the coding form is different from the coding form used to indicate that the secondary base station performs security key update;
  • the determining unit is further configured to: if it is determined that the PDCP change indication has a valid value for instructing the secondary base station to perform the PDCP data recovery process, determine to perform the PDCP data recovery process; or, if The PDCP change indication has a valid value for instructing the secondary base station to perform a security key update procedure, and then determining to perform the security key update procedure.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the secondary base station further includes a third determining unit.
  • the third determining unit is configured to determine, according to the synchronous reconfiguration request, whether to perform the PDCP data recovery process, where the updated security key is not carried in the synchronous reconfiguration request, or the indication is not carried. And the third determining unit is configured to determine to execute the PDCP data recovery process, where the secondary base station performs the information of the security key update;
  • the third determining unit is further configured to determine to perform the PDCP data recovery process when the determination result is yes.
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the secondary base station further includes a fourth determining unit;
  • the fourth determining unit is configured to determine, according to the inter-node signaling message, the performing the bottom synchronization reconfiguration process, where the bottom synchronization reconfiguration process includes an RLC entity re-establishment process, a MAC entity reset process, and a random connection.
  • the bottom synchronization reconfiguration process includes an RLC entity re-establishment process, a MAC entity reset process, and a random connection.
  • a computer readable storage medium comprising:
  • the computer readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method of the first or second aspect.
  • the MN may notify the SN of the PDCP data recovery process by using an inter-node message between the MN and the SN, so that only the PDCP data needs to be performed when the MN does not need to update the security key.
  • the MN can also notify the SN through the inter-node signaling message, so that the SN can also perform the PDCP data recovery process accordingly, and can avoid introducing the SN side link communication interruption and the SN side data loss, so that the MN and the SN
  • the data transmission that provides services to users can continue to execute, improving the user experience.
  • FIG. 1 is a schematic flowchart of a method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a primary base station according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a primary base station according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a secondary base station according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a secondary base station according to an embodiment of the present invention.
  • the SN when the SN is configured to provide services for the UE, if the MN has an Intra-MN handover or an intra-CU handover, the MN or the CU does not change, so the PDCP location does not change, so the security secret may not be updated.
  • the key does not need to perform the corresponding PDCP reconstruction process, but at this time, the MN needs to perform the PDCP data recovery process and the corresponding underlying synchronization reconfiguration process.
  • the SN In the dual connectivity scenario, the SN is also providing a data transmission process for the user. To achieve synchronization between the MN and the SN, the SN side also needs to perform a PDCP data recovery procedure.
  • the MN may It is known that the PDCP data recovery process needs to be performed, but the SN is not known, and, for this scenario, there is currently no scheme for triggering the SN to perform PDCP data recovery.
  • the embodiment of the present invention provides a scheme for notifying a secondary base station to perform packet data convergence layer protocol PDCP data recovery, in which the MN may notify the SN to perform PDCP data recovery by using an inter-node signaling message between the MN and the SN.
  • the process is such that when the MN does not need to update the security key and only needs to perform the PDCP data recovery process, the MN can also notify the SN by using the inter-node signaling message, so that the SN can also perform the PDCP data recovery process accordingly, which can avoid introduction.
  • the SN side link communication interruption and the SN side data loss enable the MN and the SN to continue to perform data transmission for providing services to the user, thereby improving the user experience.
  • an embodiment of the present invention provides a method for notifying a secondary base station to perform packet data aggregation layer protocol PDCP data recovery, which may be performed by a MN.
  • a MN packet data aggregation layer protocol
  • the process of the method is described as follows. Among them, the description of the method on the SN side is also involved in the following flow description. It should be noted here that the method of the embodiment of the present invention can be applied to a scenario in which a dual-connected and multi-connected communication system needs to notify other network nodes to perform a PDCP data recovery process, for example, a SN or other non-SN node can be notified.
  • the PDCP data recovery process is performed. The following takes the MN to notify the SN to perform the PDCP data recovery process as an example.
  • Step 101 The MN triggers an Intra-MN handover procedure and determines that no security key update is performed.
  • the MN triggers the Intra-MN handover procedure. Since only the primary cell in the MN changes, and the primary base station does not change, the PDCP location does not change, so the security key may not be updated.
  • the PDCP data recovery process and the underlying synchronization configuration process corresponding to the PDCP data recovery process are required.
  • the PDCP data recovery process is to restore the data of the user being transmitted due to the interruption of the Intra-MN handover procedure, so that the continuity and integrity of the data of the user who has not completed the transmission can be ensured after the Intra-MN handover is performed. .
  • the SN when the MN performs the Intra-MN handover procedure, the SN that has been configured for the user can also be maintained.
  • the MN needs to perform the PDCP data recovery process
  • the SN also needs to perform the PDCP data recovery process and the PDCP data.
  • the underlying synchronous reconfiguration process corresponding to the recovery process.
  • the scenario that needs to notify the SN that the PDCP data recovery process needs to be performed is not limited, that is, the MN triggers the Intra-MN handover process and keeps the SN unchanged, which is only a possible scenario, and other possible notifications are needed.
  • the method of the embodiment of the present invention is also applicable.
  • Step 102 The MN sends an inter-node signaling message to the SN, and the SN receives the inter-node signaling message.
  • the MN may use an inter-node signaling message between the MN and the SN, where the inter-node signaling message is used to indicate that the SN performs a PDCP data recovery process.
  • the inter-node signaling message may also be used to indicate the SN.
  • the underlying synchronous reconfiguration process corresponding to the PDCP data recovery process is performed.
  • the inter-node signaling message may notify the SN to perform the PDCP data recovery process in an explicit or implicit manner.
  • the explicit manner may be that the indication information indicating the execution process of the PDCP data by the secondary base station is directly carried in the inter-node signaling message.
  • the indication information may be encoded by an encoding format of the X2/Xn AP message, X2/Xn is an interface between the two base stations, and the X2/Xn AP message is encoded by using an X2/Xn AP protocol; or the indication information may also be wireless.
  • the encoding format of the Resource Control (RRC) message is encoded.
  • the inter-node signaling message may carry the indication information by using the newly defined first field, that is, the first field may be added to the original inter-node signaling message to carry the indication information.
  • the first field of the newly defined field may be an optional attribute or a field of the attribute selected.
  • the field of the optional attribute is that when the indication information is not required, the first field may not exist or exist other than the valid value.
  • the value of the mandatory attribute is that when the indication information is carried, the first field has a valid value indicating that the SN performs the PDCP data recovery process. If the indication information is not required, the first field may have other values different from the valid value.
  • the number of bits in the first field is not limited in the embodiment of the present invention.
  • the first field may be 1 bit or 2 bits.
  • 0 can be used to indicate that the SN performs the PDCP data recovery process.
  • the first field is an optional attribute field, if the first field has 0, the SN needs to perform the PDCP data recovery process. If the first field does not exist or exists and is not 0, the SN does not need to perform the PDCP data recovery process. If the first field is a mandatory attribute field and the first field has 0, the SN needs to perform a PDCP data recovery process. If the first field is other values other than 0, for example, the other value may be 1, The SN does not need to perform the PDCP data recovery process. Conversely, the rule 1 or other value indicates that the SN can perform the PDCP data recovery process.
  • the use of a value of 0 or 1 or other value to characterize the SN to perform the PDCP data recovery process is not limited.
  • the inter-node signaling message may carry the indication information by multiplexing the second field in the inter-node signaling message.
  • the second field may be any one of the inter-node signaling messages, and the second field includes at least two coding forms, and different coding forms may be used to carry different information, one of at least two coding forms.
  • the coding form can be used to carry indication information.
  • the second field may also be a field of an optional attribute or a selected attribute in the inter-node signaling message, and the number of bits included in the second field is not limited in the embodiment of the present invention.
  • the second field of multiplexing is described below for a specific application scenario.
  • the MN may be an E-Utran type base station or a 5G base station, and the SN is a 5G base station or an E-Utran type base station.
  • the MN adds, modifies, and releases the SCG part of the Secondary Cell Group (SCG) bearer or the Master Cell Group (MCG)/SCG split (split) bearer.
  • the isochronous base station modification request (SgNB Modification Reuqest) message may be initiated to notify the SN to perform an update of the SCG configuration.
  • the SgNB Modification Reuqest message may include bearer context information, UE context information, data preamble address information, and SCG configuration information that requires SN update.
  • the MN needs to notify the SN to perform security key update, and the SgNB Modification Reuqest message may also be used.
  • the PDCP change indication is included, and the PDCP change indication is used to notify the SN to perform the security key update process. Therefore, in the MR-DC scenario, the second field may be a PDCP change indication.
  • the PDCP change indication is only required to indicate that the secondary base station performs PDCP data recovery, and is used to indicate the secondary base station.
  • the encoding format of the security key is different when updating.
  • the PDCP change indication can include 1 bit
  • the 0 indicates that the SN performs the security key update procedure
  • the 1 indicates that the SN performs the PDCP data recovery procedure.
  • the SN can The specific value of the PDCP change indication is used to determine the flow to be performed.
  • the rule 1 is used to indicate that the SN performs the security key update process
  • 0 is used to indicate that the SN performs the PDCP data recovery process.
  • the number of the bits used by the PDCP change indication may also be other values, for example, 2 bits, which is not limited by the embodiment of the present invention.
  • there is no limit to what kind of coding is used to characterize the PDCP data recovery process.
  • the implicit manner may be that the inter-node signaling message does not include the indication information directly indicating that the SN performs PDCP data recovery, but after receiving the inter-node signaling message, the SN can be based on the inter-node signaling message.
  • the content included in the signaling message is used to determine whether to perform the PDCP data recovery process.
  • the inter-node signaling message may be a message including a synchronous reconfiguration request
  • the MN may carry the updated security key in the synchronous reconfiguration request, or carry information indicating that the SN performs security key update, such that the SN
  • the security key update process may be performed according to the synchronous reconfiguration request, and correspondingly, if the MN sends a synchronous reconfiguration request to the SN, but does not carry any indication SN to perform security key update in the synchronous reconfiguration request.
  • the information for example, does not carry the updated security key, or does not carry the information indicating that the SN performs the security key update, so that after receiving the synchronization reconfiguration request, the SN can know that the synchronization reconfiguration needs to be performed.
  • no need to update the security key then only the PDCP data recovery process can be performed, that is, the PDCP data recovery process can be determined by excluding other possibilities.
  • the inter-node signaling message may be used to instruct the SN to perform the PDCP data recovery process, and may also be used to instruct the SN to perform an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, so that the SN is in the according to the node.
  • the inter-signaling message determines that the PDCP data recovery process is performed, it can also determine that the underlying synchronous reconfiguration process needs to be performed.
  • the underlying synchronous reconfiguration process may include one or more processes in the RLC entity re-establishment process, the MAC entity reset process, and the random access process, that is, the underlying synchronous reconfiguration process may be any one of the three processes. Or any combination.
  • the SN may be instructed to perform the bottom synchronization reconfiguration process corresponding to the PDCP data recovery process by using the indication information carried in the inter-node signaling message, or may be in an implicit manner indicating the SN to perform the PDCP data recovery process.
  • the corresponding underlying synchronous reconfiguration process for example, when the MN sends a message including the synchronous reconfiguration request to the SN, the MN may not carry the updated security key, or does not carry the information indicating that the SN performs the security key update, so that The SN can determine that the PDCP data recovery process needs to be performed according to the synchronous reconfiguration request, and accordingly determines that the underlying synchronous reconfiguration process corresponding to the PDCP data recovery process needs to be performed.
  • Step 103 The SN determines whether to perform a PDCP data recovery process according to the inter-node signaling message.
  • the SN may, after receiving the inter-node signaling message, whether the SN performs an effective value for performing the PDCP data recovery process according to the first field, if If yes, the SN determines to perform a PDCP data recovery process and an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process. If not, the SN determines that the PDCP data recovery process and the underlying synchronization weight corresponding to the PDCP data recovery process are not required to be performed. Distribution process.
  • the SgNB Modification Reuqest message sent by the MN to the SN may not include the first field, or the first field does not carry the indication that the SN performs PDCP data.
  • the RMS receives the SgNB Modification Reuqest message, the SN directly releases the DRB that the MN indicates to release, without performing the synchronous reconfiguration process.
  • the second field may be a PDCP change indication in the SgNB Modification Reuqest message.
  • the SN may determine whether the value of the PDCP change indication is a valid value for indicating that the SN performs the PDCP data recovery process, or is used to indicate that the SN performs a valid value of the security key update process, and determines the SN. The behavior that needs to be done.
  • the SN determines to perform a PDCP data recovery procedure and an underlying synchronous reconfiguration procedure corresponding to the PDCP data recovery procedure, if the value of the PDCP change indication is To indicate that the SN performs a valid value of the security key update procedure, the SN determines to perform a security key update procedure.
  • the SN can determine to perform the PDCP data recovery process and The underlying synchronous reconfiguration process corresponding to the PDCP data recovery process.
  • Step 104 When the determination result is yes, the SN performs a PDCP data recovery process and an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process.
  • Step 105 The SN sends a response message to the MN, and the MN receives the response message.
  • the SN After the SN performs the PDCP data recovery process and the underlying synchronization reconfiguration process corresponding to the PDCP data recovery process, the SN generates a response message, which may include the indication that the UE performs the SN, because the UE also needs to perform the synchronization reconfiguration process corresponding to the SN.
  • the information of the synchronization reconfiguration is forwarded to the UE by the MN to instruct the UE to perform SN synchronization reconfiguration.
  • Step 106 The MN sends an RRC synchronization reconfiguration message to the UE, and the UE receives the RRC synchronization reconfiguration message.
  • the MN may send an RRC synchronization reconfiguration message to the UE, where the RRC synchronization reconfiguration message includes the information of the synchronization reconfiguration of the MN and the information of the SN synchronization reconfiguration, to notify the UE that the message is not to be performed.
  • the security key is updated, and the PDCP data recovery process and the corresponding synchronous reconfiguration process are executed.
  • the MN may notify the SN of the PDCP data recovery process by using the inter-node signaling message between the MN and the SN, so that the MN does not need to update the security key only needs to perform the PDCP data recovery process.
  • the MN can also notify the SN through the inter-node signaling message, so that the SN can also perform the PDCP data recovery process correspondingly, and avoid introducing the SN side link communication interruption and the SN side data loss, so that the MN and the SN provide the user with the MN and the SN.
  • the data transmission of the service can continue to execute, improving the user experience.
  • an embodiment of the present invention further provides a base station, which is a primary base station in a dual-connected and multi-connected communication system, where the primary base station includes a memory 201, a processor 202, and a transceiver 203.
  • the memory 201 and the transceiver 203 may be connected to the processor 202 through a bus interface (as shown in FIG. 2 as an example), or may be connected to the processor 202 through a dedicated connection line.
  • the memory 201 can be used to store programs.
  • the processor 202 can be configured to read a program in the memory 201, and perform the following process: sending, by the transceiver 203, an inter-node signaling message between the primary base station and the secondary base station to the secondary base station, to notify the secondary base station to perform a PDCP data recovery process.
  • the inter-node signaling message is used to instruct the secondary base station to perform a PDCP data recovery process.
  • Transceiver 203 can be used to transmit data under the control of processor 202.
  • the processor 202 is further configured to: send, by using the transceiver 203, an inter-node signaling message between the primary base station and the secondary base station to the secondary base station, to notify the secondary base station to perform the PDCP data recovery process, and trigger the internal base station to The primary cell switches the intra-MN handover procedure or the intra-CU handover procedure with the primary cell in the central node of the radio access network, and determines to keep the secondary base station unchanged and does not need to update the security key.
  • the inter-node signaling message carries the indication information, where the indication information is encoded by the coding format of the X2/Xn AP message, or is encoded by the coding format of the RRC message of the radio resource control; wherein the indication information is used to indicate the secondary base station Perform the PDCP data recovery process.
  • processor 202 is further configured to:
  • the first field that is newly defined in the inter-node signaling message carries the indication information, where the indication information is used to indicate that the secondary base station performs the PDCP data recovery process; where the first field is an optional attribute or a field of an attribute selected; or
  • the indication information is carried by the second field in the inter-node signaling message; wherein the second field includes at least two coding forms, and different coding forms are used to carry different information, and at least one of the two coding forms
  • the encoded form is used to carry the indication information.
  • the inter-node signaling message is a secondary base station modification request message in the secondary base station modification process initiated by the primary base station.
  • the second field multiplexes a PDCP change indication for notifying the secondary base station to perform the security key update; where the PDCP change indication is used to indicate that the secondary base station performs PDCP data recovery, and is used to indicate that the secondary base station performs
  • the encoding format of the security key is different when it is updated.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the secondary base station is configured to determine whether to perform a PDCP data recovery process according to the synchronous reconfiguration request; wherein, if the synchronous reconfiguration request does not carry the updated security key Or, the information indicating that the secondary base station performs the security key update is not carried, and the secondary base station can determine to perform the PDCP data recovery process.
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the underlying synchronous reconfiguration process includes an RLC entity re-establishment process, a MAC entity reset process, and a random process.
  • the underlying synchronous reconfiguration process includes an RLC entity re-establishment process, a MAC entity reset process, and a random process.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 202 and various circuits of memory represented by memory 201.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 203 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 202 is responsible for managing the bus architecture and general processing, and the memory 201 can store data used by the processor 202 in performing operations.
  • an embodiment of the present invention provides a base station, which is a primary base station in a dual-connected and multi-connected communication system, and the device includes:
  • the sending unit 301 is configured to send an inter-node signaling message between the primary base station and the secondary base station to the secondary base station, to notify the secondary base station to perform a PDCP data recovery process, where the inter-node signaling message is used to indicate that the secondary base station performs PDCP data. Recovery process.
  • the primary base station further includes a determining unit 302;
  • the determining unit 302 is configured to trigger a primary cell handover intra-MN handover procedure in the primary base station or an intra-CU handover procedure in the same manner as the primary cell in the radio access network central node, and determine to keep the secondary base station unchanged and does not need to perform security secret Update of the key.
  • the inter-node signaling message carries the indication information, where the indication information is encoded by using an encoding format of the X2/Xn AP message, or is encoded by an encoding format of the RRC message, where the indication information is used to indicate that the secondary base station performs PDCP data. Recovery process.
  • the primary base station carries the indication information by using the newly defined first field in the inter-node signaling message, where the indication information is used to indicate that the secondary base station performs the PDCP data recovery process; where the first field is an optional attribute or an attribute selected Field; or,
  • the primary base station carries the indication information by using the second field in the inter-node signaling message; wherein the second field includes at least two coding forms, and different coding forms are used to carry different information, in at least two coding forms.
  • An encoded form is used to carry indication information.
  • the inter-node signaling message is a secondary base station modification request message in the secondary base station modification process initiated by the primary base station.
  • the second field multiplexes a PDCP change indication for notifying the SN to perform the security key update; where the PDCP change indication is used to indicate that the secondary base station performs PDCP data recovery, and is used to indicate that the secondary base station performs security.
  • the encoding form is different when the key is updated.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the secondary base station is configured to determine whether to perform a PDCP data recovery process according to the synchronous reconfiguration request; wherein, if the synchronous reconfiguration request does not carry the updated security key Or, the information indicating that the secondary base station performs the security key update is not carried, and the secondary base station can determine to perform the PDCP data recovery process.
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, where the underlying synchronous reconfiguration process includes an RLC entity re-establishment process, a MAC entity reset process, and a random process.
  • the underlying synchronous reconfiguration process includes an RLC entity re-establishment process, a MAC entity reset process, and a random process.
  • the device can be used to perform the method provided by the embodiment shown in FIG. 1. Therefore, for the functions and the like that can be implemented for each functional module of the device, reference may be made to the description of the embodiment shown in FIG.
  • the first determining unit 302 is shown together in FIG. 2, but it should be understood that the first determining unit 302 is not a mandatory functional module, and thus is shown by a broken line in FIG. 2 .
  • an embodiment of the present invention provides a base station, which is a secondary base station in a dual-connected and multi-connected communication system, where the secondary base station includes: a memory 401, a processor 402, and a transceiver 403. .
  • the memory 401 and the transceiver 403 may be connected to the processor 402 through a bus interface (as shown in FIG. 4), or may be connected to the processor 402 through a dedicated connection line.
  • the memory 401 can be used to store programs.
  • the transceiver 403 can receive the inter-node signaling message sent by the primary base station.
  • the processor 402 is configured to read the instructions in the memory 401 and perform the following process: performing a PDCP data recovery process according to the inter-node signaling message.
  • the inter-node signaling message is used to instruct the secondary base station to perform a PDCP data recovery process.
  • the inter-node signaling message carries the indication information by using the newly defined first field, where the indication information is used to indicate that the secondary base station performs the PDCP data recovery process; where the first field is an optional attribute or a field of an attribute selected; or ,
  • the inter-node signaling message carries the indication information by using the multiplexed second field, where the second field includes at least two coding forms, and different coding forms are used to carry different information, and one of the at least two coding forms is encoded.
  • the form is used to carry the indication information.
  • processor 402 is further configured to:
  • the processor 402 Before the processor 402 performs the PDCP data recovery process according to the inter-node signaling message, determining whether the first field has a valid value for indicating that the secondary base station performs the PDCP data recovery process; or determining whether the second field exists for indicating the secondary base station Perform the effective value of the PDCP data recovery process;
  • the processor 402 is further configured to:
  • the PDCP change indication has a valid value for indicating that the secondary base station performs the PDCP data recovery process, determining to perform a PDCP data recovery process;
  • the PDCP change indication has a valid value for instructing the secondary base station to perform the security key update procedure, it is determined to perform the security key update procedure.
  • the inter-node signaling message is a message that includes a synchronous reconfiguration request
  • the processor 402 is further configured to:
  • the processor 402 can Determine the implementation of the PDCP data recovery process
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, and the processor 402 is further configured to:
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 402 and various circuits of memory represented by memory 401.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 403 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 402 is responsible for managing the bus architecture and general processing, and the memory 401 can store data used by the processor 402 in performing operations.
  • an embodiment of the present invention provides a base station, which is a secondary base station in a dual-connected and multi-connected communication system, and the secondary base station includes:
  • the receiving unit 501 is configured to receive an inter-node signaling message sent by the primary base station, where the inter-node signaling message is used to indicate that the secondary base station performs a PDCP data recovery process.
  • the executing unit 502 is configured to perform a PDCP data recovery process according to the inter-node signaling message.
  • the inter-node signaling message carries the indication information by using the newly defined first field, where the indication information is used to indicate that the secondary base station performs the PDCP data recovery process; where the first field is an optional attribute or a field of an attribute selected; or ,
  • the inter-node signaling message carries the indication information by using the multiplexed second field, where the second field includes at least two coding forms, and different coding forms are used to carry different information, and one of the at least two coding forms is encoded.
  • the form is used to carry the indication information.
  • the secondary base station further includes a second determining unit 503;
  • a determining unit configured to determine whether the first field has a valid value for indicating that the secondary base station performs a PDCP data recovery process; or determining whether the second field has a valid value for indicating that the secondary base station performs a PDCP data recovery process;
  • the determining unit is further configured to determine to perform a PDCP data recovery process if the determination result is yes.
  • the second field multiplexes a PDCP change indication for notifying the secondary base station to perform the security key update
  • the PDCP change indication is used to indicate that the secondary base station performs the PDCP data recovery process, and is used to indicate the secondary base station.
  • the encoding format is different when performing security key update
  • the determining unit is further configured to: if it is determined that the PDCP change indication has a valid value for indicating that the secondary base station performs the PDCP data recovery procedure, determine to perform a PDCP data recovery procedure; or if it is determined that the PDCP change indication exists to indicate that the secondary base station performs security
  • the valid value of the key update process determines the process of performing the security key update.
  • the inter-node signaling message is a message including a synchronous reconfiguration request
  • the secondary base station further includes a third determining unit 504;
  • the third determining unit 504 is configured to determine, according to the synchronization reconfiguration request, whether to perform a PDCP data recovery process, where the updated reconfiguration request does not carry the updated security key, or does not carry the indication secondary base station to perform security key update.
  • the third determining unit 504 can determine to perform a PDCP data recovery process;
  • the third determining unit 504 is further configured to determine to perform a PDCP data recovery process when the determination result is YES.
  • the inter-node signaling message is further used to indicate that the secondary base station performs an underlying synchronous reconfiguration process corresponding to the PDCP data recovery process, and the secondary base station further includes a fourth determining unit 505;
  • the fourth determining unit 505 is configured to determine, according to the inter-node signaling message, the performing an underlying synchronous reconfiguration process, where the underlying synchronous reconfiguration process includes one or more of an RLC entity re-establishment process, a MAC entity reset process, and a random access process. Process.
  • the device can be used to perform the method provided by the embodiment shown in FIG. 1. Therefore, for the functions and the like that can be implemented for each functional module of the device, reference may be made to the description of the embodiment shown in FIG. 1, and details are not described herein.
  • the second determining unit 503 to the fourth determining unit 505 are shown together in FIG. 5, but it should be noted that the second determining unit 503 to the fourth determining unit 505 are not mandatory functional modules, and therefore 5 is shown by a broken line.
  • an embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores computer instructions, and when the computer instructions are run on a computer, causes the computer to execute as shown in FIG. method.
  • the computer readable storage medium includes: a Universal Serial Bus flash drive (USB), a mobile hard disk, a Read-Only Memory (ROM), a random access memory ( Random Access Memory (RAM), disk or optical disc, and other storage media that can store program code.
  • USB Universal Serial Bus flash drive
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit or unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.
  • the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may also be an independent physical module.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • all or part of the technical solutions of the embodiments of the present invention may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a computer device, for example, A personal computer, server, or network device, or the like, or a processor, performs all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a universal serial bus flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, and the like, which can store program codes.

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Abstract

一种通知执行PDCP数据恢复的方法及设备，用于通知SN执行PDCP数据恢复流程。通知执行分组数据汇聚层协议PDCP数据恢复的方法包括：主基站将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程。执行分组数据汇聚层协议PDCP数据恢复的方法包括：辅基站接收主基站发送的节点间信令消息；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；所述辅基站根据所述节点间信令消息执行所述PDCP数据恢复流程。

Description

一种通知执行PDCP数据恢复的方法及设备
本申请要求在2017年12月29日提交中国专利局、申请号为201711476873.X、发明名称为“一种通知执行PDCP数据恢复的方法及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，特别涉及一种通知执行PDCP数据恢复的方法及设备。
背景技术
目前，在双连接(Dual Connectivity，DC)场景中，用户设备(User Equipment，UE)可以同时连接两个为其提供通信服务的无线接入网(Radio Access Network，RAN)节点，其中一个RAN节点为主基站(Master Node，MN)，另一个为辅基站(Secondary Node，SN)。其中，MN能够产生MN端的无线配置信息，SN能够产生SN端的无线配置信息，并且MN和SN都可以包括多个小区(Cell)为UE提供服务，这多个小区中其中一个为主小区(Primary Cell，PCell)，其余的皆为辅小区(Secondary Cell，SCell)。当网络侧配置了SN为UE提供服务时，若是MN发生MN内的主小区(Intra-MN)切换时，或同无线接入网中心节点(Central Unit，CU)内主小区切换(intra-CU handover)流程，由于MN或CU并未发生改变，所以分组数据汇聚层协议(Packet Data Convergence Protocol，PDCP)位置并未发生改变，因此可以不更新安全密钥，也就无需执行相应的PDCP重建流程，但是MN需要执行PDCP数据恢复(PDCP data recovery)流程以及相应的底层同步重配流程。在双连接场景中，SN也为用户提供数据传输过程，为实现MN和SN的同步，SN侧也需要执行PDCP数据恢复流程，但是针对在Intra-MN或intra-CU切换时，MN节点可以知道需要执行PDCP数据恢复流程，但是SN却无法知晓，同时，针对于 这种场景目前还未存在触发SN执行PDCP数据恢复的方案。
发明内容
本发明实施例提供一种通知执行分组数据汇聚层协议PDCP数据恢复的方法及设备，用于通知SN执行PDCP数据恢复流程。
第一方面，提供一种通知执行分组数据汇聚层协议PDCP数据恢复的方法，该方法包括：
主基站将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程。
可选的，在主基站将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程之前，所述方法还包括：
所述主基站触发主基站内的主小区切换(intra-MN handover)流程或同无线接入网中心节点内主小区切换intra-CU handover流程，且所述主基站确定保持辅基站不变以及不需要进行安全密钥的更新。
可选的，所述节点间信令消息携带指示信息，所述指示信息通过X2/Xn AP消息的编码格式进行编码，或者，通过RRC消息的编码格式进行编码；其中，所述指示信息用于指示所述辅基站执行所述PDCP数据恢复流程。
可选的，所述方法还包括：
所述主基站通过所述节点间信令消息中新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
所述主基站通过复用所述节点间信令消息中的第二字段携带所述指示信息；其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
可选的，若所述主基站和所述辅基站分别为多无线接入技术双连接(Multi-RAT Dual Connectivity,MR-DC)场景中的主基站和辅基站，则所述节点间信令消息为所述主基站发起的辅基站修改流程中的辅基站修改请求消息。
可选的，所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP修改指示信息(PDCP change indication)；其中，所述PDCP change indication在用于指示所述辅基站进行PDCP数据恢复时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同。
可选的，所述节点间信令消息为包括同步重配请求的消息，所述辅基站能够根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述辅基站能够确定执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程；其中，所述底层同步重配流程包括无线链路控制(RLC)实体重建流程、媒体接入控制(MAC)实体重置流程和随机接入过程中的一个或者多个流程。
第二方面，提供一种执行分组数据汇聚层协议PDCP数据恢复的方法，该方法包括：
辅基站接收主基站发送的节点间信令消息；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；
所述辅基站根据所述节点间信令消息执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息通过新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
所述节点间信令消息通过复用的第二字段携带所述指示信息，其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
可选的，在所述辅基站根据所述节点间信令消息执行所述PDCP数据恢复流程之前，所述方法还包括：
所述辅基站确定所述第一字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；或者，
所述辅基站确定所述第二字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；
若确定结果为是，则所述辅基站确定执行所述PDCP数据恢复流程。
可选的，若所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP change indication，且所述PDCP change indication在用于指示所述辅基站执行PDCP数据恢复流程时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同；则所述方法还包括：
若所述辅基站确定所述PDCP change indication存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值，则所述辅基站确定执行所述PDCP数据恢复流程；或者，
若所述辅基站确定所述PDCP change indication存在用于指示所述辅基站执行安全密钥更新流程的有效值，则所述辅基站确定执行所述安全密钥更新流程。
可选的，所述节点间信令消息为包括同步重配请求的消息，则所述方法还包括：
所述辅基站根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述辅基站能够确定执行所述PDCP数据恢复流程；
在确定结果为是时，所述辅基站确定执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程，则所述方法还包括：
所述辅基站根据所述节点间信令消息确定执行所述底层同步重配流程； 其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
第三方面，提供一种基站，该基站是双连接以及多连接的通信系统中的主基站，包括：
存储器，用于存储指令；
处理器，用于读取所述存储器中的指令，执行下列过程：
通过收发机将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程。
所述收发机，用于在所述处理器的控制下发送数据。
可选的，所述处理器，还用于在通过收发机将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程之前，触发所述主基站内的主小区切换intra-MN handover流程或同无线接入网中心节点内主小区切换intra-CU handover流程，且确定保持辅基站不变以及不需要进行安全密钥的更新。
可选的，所述节点间信令消息携带指示信息，所述指示信息通过X2/Xn AP消息的编码格式进行编码，或者，通过无线资源控制RRC消息的编码格式进行编码；其中，所述指示信息用于指示所述辅基站执行所述PDCP数据恢复流程。
可选的，所述处理器还用于：
通过所述节点间信令消息中新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
通过复用所述节点间信令消息中的第二字段携带所述指示信息；其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
可选的，若所述主基站和所述辅基站分别为MR-DC场景中的主基站和辅 基站，则所述节点间信令消息为所述主基站发起的辅基站修改流程中的辅基站修改请求消息。
可选的，所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP change indication；其中，所述PDCP change indication在用于指示所述辅基站进行PDCP数据恢复时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同。
可选的，所述节点间信令消息为包括同步重配请求的消息，所述辅基站能够根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述辅基站能够确定执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程；其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
第四方面，提供一种基站，该基站是双连接以及多连接的通信系统中的辅基站，包括：
存储器，用于存储指令；
处理器，用于读取所述存储器中的指令，执行下列过程：
通过收发机接收主基站发送的节点间信令消息；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；
根据所述节点间信令消息执行所述PDCP数据恢复流程；
所述收发机，用于在所述处理器的控制下接收数据。
可选的，所述节点间信令消息通过新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
所述节点间信令消息通过复用的第二字段携带所述指示信息，其中，所 述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
可选的，所述处理器还用于：
在所述处理器根据所述节点间信令消息执行所述PDCP数据恢复流程之前，确定所述第一字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；或者，确定所述第二字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；
若确定结果为是，则确定执行所述PDCP数据恢复流程。
可选的，若所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP change indication，且所述PDCP change indication在用于指示所述辅基站执行PDCP数据恢复流程时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同，则所述处理器还用于：
若确定所述PDCP change indication存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值，则确定执行所述PDCP数据恢复流程；或者，
若确定所述PDCP change indication存在用于指示所述辅基站执行安全密钥更新流程的有效值，则确定执行所述安全密钥更新流程。
可选的，所述节点间信令消息为包括同步重配请求的消息，则所述处理器还用于：
根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述处理器能够确定执行所述PDCP数据恢复流程；
在确定结果为是时，确定执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程，则所述处理器还用于：
根据所述节点间信令消息确定执行所述底层同步重配流程；其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入 过程中的一个或者多个流程。
第五方面，提供一种基站，该基站是双连接以及多连接的通信系统中的主基站，所述主基站包括：
发送单元，用于将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程。
可选的，所述主基站还包括确定单元；
所述确定单元，用于触发主基站内的主小区切换intra-MN handover流程或同无线接入网中心节点内主小区切换intra-CU handover流程，且确定保持辅基站不变以及不需要进行安全密钥的更新。
可选的，所述节点间信令消息携带指示信息，所述指示信息通过X2/Xn AP消息的编码格式进行编码，或者，通过RRC消息的编码格式进行编码；其中，所述指示信息用于指示所述辅基站执行所述PDCP数据恢复流程。
可选的，所述主基站通过所述节点间信令消息中新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
所述主基站通过复用所述节点间信令消息中的第二字段携带所述指示信息；其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
可选的，若所述主基站和所述辅基站分别为MR-DC场景中的主基站和辅基站，则所述节点间信令消息为所述主基站发起的辅基站修改流程中的辅基站修改请求消息。
可选的，所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP change indication；其中，所述PDCP change indication在用于指示所述辅基站进行PDCP数据恢复时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同。
可选的，所述节点间信令消息为包括同步重配请求的消息，所述辅基站能够根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述辅基站能够确定执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程；其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
第六方面，提供一种基站，该基站是双连接以及多连接的通信系统中的辅基站，所述辅基站包括：
接收单元，用于接收主基站发送的节点间信令消息；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；
执行单元，用于根据所述节点间信令消息执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息通过新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
所述节点间信令消息通过复用的第二字段携带所述指示信息，其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
可选的，所述辅基站还包括第二确定单元；
所述确定单元，用于确定所述第一字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；或者，确定所述第二字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；
所述确定单元，还用于若确定结果为是，则确定执行所述PDCP数据恢复流程。
可选的，若所述第二字段复用用于通知所述辅基站进行安全秘钥更新的 PDCP change indication，且所述PDCP change indication在用于指示所述辅基站执行PDCP数据恢复流程时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同；
则所述确定单元，还用于若确定所述PDCP change indication存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值，则确定执行所述PDCP数据恢复流程；或者，若确定所述PDCP change indication存在用于指示所述辅基站执行安全密钥更新流程的有效值，则确定执行所述安全密钥更新流程。
可选的，所述节点间信令消息为包括同步重配请求的消息，则所述辅基站还包括第三确定单元；
所述第三确定单元，用于根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述第三确定单元能够确定执行所述PDCP数据恢复流程；
所述第三确定单元，还用于在确定结果为是时，确定执行所述PDCP数据恢复流程。
可选的，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程，则所述辅基站还包括第四确定单元；
所述第四确定单元，用于根据所述节点间信令消息确定执行所述底层同步重配流程；其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
第七方面，提供一种计算机可读存储介质，包括：
所述计算机可读存储介质存储有计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如第一方面或第二方面所述的方法。
在本发明实施例中，MN可以通过MN与SN之间的节点间信令消息(inter-node message)通知SN进行PDCP数据恢复流程，这样，在MN不需要更新安全密钥只需要进行PDCP数据恢复流程时，MN也能够通过节点间信 令消息来通知SN，以使得SN也能够相应的执行PDCP数据恢复流程，可以避免引入SN侧链路通信间断和SN侧数据损失，以使得MN和SN为用户提供服务的数据传输都能够继续执行，提升用户体验。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面所介绍的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的方法的流程示意图；
图2为本发明实施例提供的主基站的一种结构示意图；
图3为本发明实施例提供的主基站的一种结构示意图；
图4为本发明实施例提供的辅基站的一种结构示意图；
图5为本发明实施例提供的辅基站的一种结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
发明人在发明过程中注意到：
目前，当网络侧配置了SN为UE提供服务时，若是MN发生Intra-MN切换或intra-CU切换，由于MN或CU并未发生改变，所以PDCP位置并未发生改变，因此可以不更新安全密钥，也就无需执行相应的PDCP重建流程，但是此时MN需要执行PDCP数据恢复流程以及相应的底层同步重配流程。在双连接场景中，SN也在为用户提供数据传输过程，为实现MN和SN的同步，SN侧也需要执行PDCP数据恢复流程，然而，针对在Intra-MN切换或intra-CU切换，MN可以知道需要执行PDCP数据恢复流程，但是SN却无法知晓，并且，针对于这种场景，目前也还没有触发SN执行PDCP数据恢复的方案。
鉴于此，本发明实施例提供一种通知辅基站执行分组数据汇聚层协议PDCP数据恢复的方案，在该方案中，MN可以通过MN与SN之间的节点间信令消息通知SN进行PDCP数据恢复流程，这样，在MN不需要更新安全密钥只需要进行PDCP数据恢复流程时，MN也能够通过节点间信令消息来通知SN，以使得SN也能够相应的执行PDCP数据恢复流程，可以避免引入SN侧链路通信间断和SN侧数据损失，使得MN和SN为用户提供服务的数据传输都能够继续执行，提升用户体验。
下面结合附图介绍本发明实施例提供的技术方案。
请参见图1，本发明一实施例提供一种通知辅基站执行分组数据汇聚层协议PDCP数据恢复的方法，该方法可以通过MN来执行。以intra-MN切换场景为例，该方法的流程描述如下。其中，在下面的流程描述中还涉及到SN侧的方法描述。在这里需要声明的是，本发明实施例的方法能够适用于在双连接以及多连接的通信系统中，需要通知其他网络节点执行PDCP数据恢复流程的场景，例如，可以通知SN或者其他非SN节点执行PDCP数据恢复流程，下面以MN通知SN执行PDCP数据恢复流程为例进行描述。
步骤101：MN触发Intra-MN切换流程，并且确定不进行安全密钥更新。
本发明实施例中，MN触发Intra-MN切换流程，由于只是MN内的主小区发生变化，而主基站并未发生变化，因而PDCP位置并未发生变化，因此可以不更新安全密钥，而只需要进行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步配置流程。其中，PDCP数据恢复流程是为了恢复由于被Intra-MN切换流程中断的正在传输的用户的数据，以使得在进行Intra-MN切换之后，能够保证未传输完成的用户的数据的连续性与完整性。
具体的，在MN进行Intra-MN切换流程时，已经为用户配置的SN也可以继续保持，那么在MN需要进行PDCP数据恢复流程时，相应的，SN也需要执行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步重配流程。
在本发明实施中，并不限制需要通知SN需要执行PDCP数据恢复流程的 场景，也就是说，MN触发Intra-MN切换流程且保持SN不变只是一种可能的场景，在其他可能的需要通知SN需要执行PDCP数据恢复流程的场景中，本发明实施例的方法同样适用。
步骤102：MN向SN发送节点间信令消息，SN接收该节点间信令消息。
本发明实施例中，MN可以通过MN与SN之间的节点间信令消息，该节点间信令消息用于指示SN执行PDCP数据恢复流程，当然，节点间信令消息也可以用于指示SN执行与PDCP数据恢复流程相对应的底层同步重配流程。其中，节点间信令消息可以通过显性或者隐式的方式来通知SN执行PDCP数据恢复流程。
下面对显性的方式进行描述。
在本发明实施中，显性的方式可以是在节点间信令消息中直接携带用于指示辅基站执行PDCP数据恢复流程的指示信息。其中，指示信息可以通过X2/Xn AP消息的编码格式进行编码，X2/Xn为两基站之间的接口，X2/Xn AP消息采用X2/Xn AP协议进行编码；或者，指示信息还可以通过无线资源控制(Radio Resource Control，RRC)消息的编码格式进行编码。
具体的，节点间信令消息可以通过新定义的第一字段来携带指示信息，也就是说，可以在原有的节点间信令消息中增加第一字段，来携带指示信息。其中，新定义的第一字段可以是可选属性或者必选属性的字段，可选属性的字段即为在无需携带指示信息时，第一字段可以不存在或存在携带不同于该有效值的其他值；必选属性的字段即为在携带该指示信息时，第一字段存在指示SN执行PDCP数据恢复流程的有效值，若是无需携带指示信息，第一字段可以存在不同于有效值的其他值。
第一字段的比特(bit)数本发明实施例并不进行限制，例如第一字段可以为1bit或者2bit。例如，第一字段为1bit时，0可以表征指示SN执行PDCP数据恢复流程，那么在第一字段为可选属性的字段时，若是第一字段存在0时，则表征SN需要执行PDCP数据恢复流程，若是第一字段不存在或存在且不为0时，则SN无需执行PDCP数据恢复流程。若第一字段为必选属性的字 段，且第一字段存在0时，则表征SN需要执行PDCP数据恢复流程，若第一字段是不为0的其他值时，例如其他值可以为1，则SN无需执行PDCP数据恢复流程。反之，规定1或其他值指示SN执行PDCP数据恢复流程亦可。使用何值0或1或其他值表征指示SN执行PDCP数据恢复流程不限制。
具体的，节点间信令消息可以通过复用节点间信令消息中的第二字段来携带指示信息。其中，第二字段可以是节点间信令消息中的任一字段，并且第二字段包括至少两种编码形式，不同的编码形式可以用于携带不同的信息，至少两种编码形式中的其中一种编码形式可以用于携带指示信息。当然，第二字段也可以是节点间信令消息中可选属性或者必选属性的字段，并且对于第二字段包括的bit数本发明实施例也并不进行限制。下面针对具体的应用场景对复用的第二字段进行描述。
在MR-DC场景中，MN可以为E-Utran类型的基站或5G基站，SN为5G基站或E-Utran类型的基站。在MR-DC场景中，MN对于辅节点小区组(Secondary Cell Group，SCG)承载或者主节点小区组(Master Cell Group，MCG)/SCG分离(split)承载中的SCG部分的增加、修改和释放等时，可以发起辅基站修改请求(SgNB Modification Reuqest)消息，以通知SN进行SCG配置的更新。具体的，SgNB Modification Reuqest消息中可以包括承载上下文信息、UE上下文信息、数据前传地址信息以及需要SN更新的SCG配置信息，若是，MN需要通知SN进行安全密钥更新，SgNB Modification Reuqest消息中还可以包括PDCP修改指示信息(PDCP change indication)，PDCP change indication即用于通知SN执行安全密钥更新流程。因此，在MR-DC场景中，第二字段可以为PDCP change indication，在具体应用中，只需将PDCP change indication在用于指示辅基站进行PDCP数据恢复时的编码形式与用于指示辅基站进行安全秘钥更新时的编码形式不同即可。例如，PDCP change indication可以包括1bit，那么则可以用0来表征指示SN执行安全密钥更新流程，用1来表征指示SN执行PDCP数据恢复流程，则SN在接收到SgNB Modification Reuqest消息之后则可以根据PDCP change indication的具体值来 判断所要执行的流程。反之规定1用来表征指示SN执行安全秘钥更新流程，0用来表征指示SN执行PDCP数据恢复流程亦可。当然，PDCP change indication使用的bit的数量也可以为其他值，例如为2bit，本发明实施例对此不作限制。当然，使用何种编码表征PDCP数据恢复流程也不限制。
下面对隐性的方式进行描述。
在本发明实施中，隐性的方式可以是在节点间信令消息中虽然没有包括直接指示SN执行PDCP数据恢复的指示信息，但是SN在收到节点间信令消息之后，能够根据该节点间信令消息所包括的内容来判断是否要执行PDCP数据恢复流程。
具体的，节点间信令消息可以是包括同步重配请求的消息，MN可以在同步重配请求中携带更新后的安全密钥，或者，携带指示SN进行安全密钥更新的信息，这样，SN则可以根据同步重配请求执行安全密钥更新流程，那么与之相对应的，若是MN向SN发送了同步重配请求，但是并未在同步重配请求中携带任何指示SN进行安全密钥更新的信息，例如未携带更新后的安全密钥，或者，未携带指示SN进行安全密钥更新的信息，这样，SN在收到这样的同步重配请求之后，则可以知道需要进行同步重配，并且无需进行安全密钥的更新，那么就只能执行PDCP数据恢复流程了，也就是说可以通过排除其他可能性来确定是否执行PDCP数据恢复流程。
本发明实施例中，节点间信令消息除了可以通知SN执行PDCP数据恢复流程之外，还可以用于指示SN进行与PDCP数据恢复流程相对应的底层同步重配流程，这样，SN在根据节点间信令消息确定执行PDCP数据恢复流程时，还可以确定需要执行底层同步重配流程。其中，底层同步重配流程可以包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程，也就是说，底层同步重配流程可以是这三种流程中任意一个或者是任意的组合。
具体的，可以通过节点间信令消息携带的指示信息来指示SN进行与PDCP数据恢复流程相对应的底层同步重配流程，或者，还可以通过隐式的方 式指示SN进行与PDCP数据恢复流程相对应的底层同步重配流程，例如上述在MN向SN发送包括同步重配请求的消息时，可以不携带更新后的安全密钥，或者，不携带指示SN进行安全密钥更新的信息，这样，SN则可以根据同步重配请求确定需要执行PDCP数据恢复流程，也就相应的确定了需要执行与PDCP数据恢复流程相对应的底层同步重配流程。
步骤103：SN根据节点间信令消息确定是否执行PDCP数据恢复流程。
具体的，若是MN通过新定义的第一字段携带指示信息，那么SN在接收到节点间信令消息之后，则可以根据第一字段是否存在用于指示SN执行PDCP数据恢复流程的有效值，若存在，则SN确定执行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步重配流程，若不存在，则SN确定无需执行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步重配流程。例如，MN发起SN modification流程释放MCG split无线数据承载(Data Radio Bearer，DRB)，那么MN向SN发送的SgNB Modification Reuqest消息则可以不包含第一字段，或者第一字段不携带指示SN执行PDCP数据恢复流程的有效值，那么SN接收到SgNB Modification Reuqest消息之后，则会直接释放MN指示释放的DRB，而不进行同步重配过程。
具体的，若是MN通过复用的第二字段携带指示信息，例如在MR-DC场景中，第二字段可以为SgNB Modification Reuqest消息中的PDCP change indication。那么SN在接收到SgNB Modification Reuqest消息之后，则可以根据PDCP change indication的值是用于指示SN执行PDCP数据恢复流程的有效值，还是用于指示SN执行安全密钥更新流程的有效值，确定SN需要进行的行为。若PDCP change indication的值是用于指示SN执行PDCP数据恢复流程的有效值，则SN确定执行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步重配流程，若PDCP change indication的值是用于指示SN执行安全密钥更新流程的有效值，则SN确定执行安全密钥更新流程。
具体的，若是MN向SN发送的包含同步重配请求的消息中未携带更新后的安全密钥，或者，未携带指示SN进行安全密钥更新的信息，则SN能够确 定执行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步重配流程。
步骤104：在确定结果为是时，SN执行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步重配流程。
步骤105：SN向MN发送响应消息，MN接收响应消息。
在SN执行PDCP数据恢复流程以及与PDCP数据恢复流程相对应的底层同步重配流程之后，由于UE也需要进行与SN相应的同步重配过程，因而SN生成的响应消息中可以包括指示UE进行SN同步重配的信息，通过MN将指示UE进行SN同步重配的信息转发给UE。
步骤106：MN向UE发送RRC同步重配消息，UE接收RRC同步重配消息。
在MN接收到SN的响应消息之后，MN则可以向UE发送RRC同步重配消息，其中，RRC同步重配消息包括MN的同步重配的信息和SN同步重配的信息，以通知UE不进行安全密钥的更新，而是执行PDCP数据恢复流程和底层相应的同步重配流程。
综上所述，本发明实施例中，MN可以通过MN与SN之间的节点间信令消息通知SN进行PDCP数据恢复流程，这样，在MN不需要更新安全密钥只需要进行PDCP数据恢复流程时，MN也能够通过节点间信令消息来通知SN，以使得SN也能够相应的执行PDCP数据恢复流程，避免引入SN侧链路通信间断和SN侧数据损失，以使得MN和SN为用户提供服务的数据传输都能够继续执行，提升用户体验。
本发明实施例中，为了方便整个流程的描述，对于图1所示的流程将MN和SN所执行的方法混合进行描述，但需要知道的是，MN和SN均能够独立执行各自对应的方法步骤。
请参见图2，基于同一发明构思，本发明一实施例还提供一种基站，该基站是双连接以及多连接的通信系统中的主基站，主基站包括存储器201、处理器202和收发机203。其中，存储器201和收发机203可以通过总线接口与处 理器202相连接(图2以此为例)，或者也可以通过专门的连接线与处理器202连接。
其中，存储器201可以用于存储程序。处理器202可以用于读取存储器201中的程序，执行下列过程：通过收发机203将主基站与辅基站之间的节点间信令消息发送给辅基站，以通知辅基站执行PDCP数据恢复流程；其中，节点间信令消息用于指示辅基站执行PDCP数据恢复流程。收发机203可以用于在处理器202的控制下发送数据。
可选的，处理器202，还用于在通过收发机203将主基站与辅基站之间的节点间信令消息发送给辅基站，以通知辅基站执行PDCP数据恢复流程之前，触发主基站内的主小区切换intra-MN handover流程或同无线接入网中心节点内主小区切换intra-CU handover流程，且确定保持辅基站不变以及不需要进行安全密钥的更新。
可选的，节点间信令消息携带指示信息，指示信息通过X2/Xn AP消息的编码格式进行编码，或者，通过无线资源控制RRC消息的编码格式进行编码；其中，指示信息用于指示辅基站执行PDCP数据恢复流程。
可选的，处理器202还用于：
通过节点间信令消息中新定义的第一字段携带指示信息，指示信息用于指示辅基站执行PDCP数据恢复流程；其中，第一字段为可选属性或者必选属性的字段；或者，
通过复用节点间信令消息中的第二字段携带指示信息；其中，第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，至少两种编码形式中的一种编码形式用于携带指示信息。
可选的，若主基站和辅基站分别为MR-DC场景中的主基站和辅基站，则节点间信令消息为主基站发起的辅基站修改流程中的辅基站修改请求消息。
可选的，第二字段复用用于通知辅基站进行安全秘钥更新的PDCP change indication；其中，PDCP change indication在用于指示辅基站进行PDCP数据恢复时的编码形式与用于指示辅基站进行安全秘钥更新时的编码形式不同。
可选的，节点间信令消息为包括同步重配请求的消息，辅基站能够根据同步重配请求确定是否执行PDCP数据恢复流程；其中，若同步重配请求中未携带更新后的安全密钥，或者，未携带指示辅基站进行安全密钥更新的信息，则辅基站能够确定执行PDCP数据恢复流程。
可选的，节点间信令消息还用于指示辅基站执行与PDCP数据恢复流程相对应的底层同步重配流程；其中，底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
其中，在图2中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器202代表的一个或多个处理器和存储器201代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机203可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器202负责管理总线架构和通常的处理，存储器201可以存储处理器202在执行操作时所使用的数据。
请参见图3，基于同一发明构思，本发明一实施例提供一种基站，该基站是双连接以及多连接的通信系统中的主基站，该设备包括：
发送单元301，用于将主基站与辅基站之间的节点间信令消息发送给辅基站，以通知辅基站执行PDCP数据恢复流程；其中，节点间信令消息用于指示辅基站执行PDCP数据恢复流程。
可选的，主基站还包括确定单元302；
确定单元302，用于触发主基站内的主小区切换intra-MN handover流程或同无线接入网中心节点内主小区切换intra-CU handover流程，且确定保持辅基站不变以及不需要进行安全密钥的更新。
可选的，节点间信令消息携带指示信息，指示信息通过X2/Xn AP消息的编码格式进行编码，或者，通过RRC消息的编码格式进行编码；其中，指示信息用于指示辅基站执行PDCP数据恢复流程。
可选的，主基站通过节点间信令消息中新定义的第一字段携带指示信息，指示信息用于指示辅基站执行PDCP数据恢复流程；其中，第一字段为可选属性或者必选属性的字段；或者，
主基站通过复用节点间信令消息中的第二字段携带指示信息；其中，第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，至少两种编码形式中的一种编码形式用于携带指示信息。
可选的，若主基站和辅基站分别为MR-DC场景中的主基站和辅基站，则节点间信令消息为主基站发起的辅基站修改流程中的辅基站修改请求消息。
可选的，第二字段复用用于通知SN进行安全秘钥更新的PDCP change indication；其中，PDCP change indication在用于指示辅基站进行PDCP数据恢复时的编码形式与用于指示辅基站进行安全秘钥更新时的编码形式不同。
可选的，节点间信令消息为包括同步重配请求的消息，辅基站能够根据同步重配请求确定是否执行PDCP数据恢复流程；其中，若同步重配请求中未携带更新后的安全密钥，或者，未携带指示辅基站进行安全密钥更新的信息，则辅基站能够确定执行PDCP数据恢复流程。
可选的，节点间信令消息还用于指示辅基站执行与PDCP数据恢复流程相对应的底层同步重配流程；其中，底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
该设备可以用于执行图1所示的实施例所提供的方法，因此，对于该设备的各功能模块所能够实现的功能等可参考图1所示的实施例的描述，不多赘述。其中，第一确定单元302在图2中一并示出，但需要知道的是，第一确定单元302并不是必选的功能模块，因此在图2中以虚线示出。
请参见图4，基于同一发明构思，本发明一实施例提供一种基站，该基站是双连接以及多连接的通信系统中的辅基站，辅基站包括：存储器401、处理器402和收发机403。其中，存储器401和收发机403可以通过总线接口与处理器402相连接(图4以此为例)，或者也可以通过专门的连接线与处理器402连接。
其中，存储器401可以用于存储程序。收发机403可以接收主基站发送的节点间信令消息。处理器402，用于读取存储器401中的指令，执行下列过程：根据节点间信令消息执行PDCP数据恢复流程。其中，节点间信令消息用于指示辅基站执行PDCP数据恢复流程。
可选的，节点间信令消息通过新定义的第一字段携带指示信息，指示信息用于指示辅基站执行PDCP数据恢复流程；其中，第一字段为可选属性或者必选属性的字段；或者，
节点间信令消息通过复用的第二字段携带指示信息，其中，第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，至少两种编码形式中的一种编码形式用于携带指示信息。
可选的，处理器402还用于：
在处理器402根据节点间信令消息执行PDCP数据恢复流程之前，确定第一字段是否存在用于指示辅基站执行PDCP数据恢复流程的有效值；或者，确定第二字段是否存在用于指示辅基站执行PDCP数据恢复流程的有效值；
若确定结果为是，则确定执行PDCP数据恢复流程。
可选的，若第二字段复用用于通知辅基站进行安全秘钥更新的PDCP change indication，且PDCP change indication在用于指示辅基站执行PDCP数据恢复流程时的编码形式与用于指示辅基站进行安全秘钥更新时的编码形式不同，则处理器402还用于：
若确定PDCP change indication存在用于指示辅基站执行PDCP数据恢复流程的有效值，则确定执行PDCP数据恢复流程；或者，
若确定PDCP change indication存在用于指示辅基站执行安全密钥更新流程的有效值，则确定执行安全密钥更新流程。
可选的，节点间信令消息为包括同步重配请求的消息，则处理器402还用于：
根据同步重配请求确定是否执行PDCP数据恢复流程；其中，若同步重配请求中未携带更新后的安全密钥，或者，未携带指示辅基站进行安全密钥 更新的信息，则处理器402能够确定执行PDCP数据恢复流程；
在确定结果为是时，确定执行PDCP数据恢复流程。
可选的，节点间信令消息还用于指示辅基站执行与PDCP数据恢复流程相对应的底层同步重配流程，则处理器402还用于：
根据节点间信令消息确定执行底层同步重配流程；其中，底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
其中，在图4中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器402代表的一个或多个处理器和存储器401代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机403可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器402负责管理总线架构和通常的处理，存储器401可以存储处理器402在执行操作时所使用的数据。
请参见图5，基于同一发明构思，本发明一实施例提供一种基站，该基站是双连接以及多连接的通信系统中的辅基站，辅基站包括：
接收单元501，用于接收主基站发送的节点间信令消息；其中，节点间信令消息用于指示辅基站执行PDCP数据恢复流程；
执行单元502，用于根据节点间信令消息执行PDCP数据恢复流程。
可选的，节点间信令消息通过新定义的第一字段携带指示信息，指示信息用于指示辅基站执行PDCP数据恢复流程；其中，第一字段为可选属性或者必选属性的字段；或者，
节点间信令消息通过复用的第二字段携带指示信息，其中，第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，至少两种编码形式中的一种编码形式用于携带指示信息。
可选的，辅基站还包括第二确定单元503；
确定单元，用于确定第一字段是否存在用于指示辅基站执行PDCP数据恢复流程的有效值；或者，确定第二字段是否存在用于指示辅基站执行PDCP数据恢复流程的有效值；
确定单元，还用于若确定结果为是，则确定执行PDCP数据恢复流程。
可选的，若第二字段复用用于通知辅基站进行安全秘钥更新的PDCP change indication，且PDCP change indication在用于指示辅基站执行PDCP数据恢复流程时的编码形式与用于指示辅基站进行安全秘钥更新时的编码形式不同；
则确定单元，还用于若确定PDCP change indication存在用于指示辅基站执行PDCP数据恢复流程的有效值，则确定执行PDCP数据恢复流程；或者，若确定PDCP change indication存在用于指示辅基站执行安全密钥更新流程的有效值，则确定执行安全密钥更新流程。
可选的，节点间信令消息为包括同步重配请求的消息，则辅基站还包括第三确定单元504；
第三确定单元504，用于根据同步重配请求确定是否执行PDCP数据恢复流程；其中，若同步重配请求中未携带更新后的安全密钥，或者，未携带指示辅基站进行安全密钥更新的信息，则第三确定单元504能够确定执行PDCP数据恢复流程；
第三确定单元504，还用于在确定结果为是时，确定执行PDCP数据恢复流程。
可选的，节点间信令消息还用于指示辅基站执行与PDCP数据恢复流程相对应的底层同步重配流程，则辅基站还包括第四确定单元505；
第四确定单元505，用于根据节点间信令消息确定执行底层同步重配流程；其中，底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
该设备可以用于执行图1所示的实施例所提供的方法，因此，对于该设备的各功能模块所能够实现的功能等可参考图1所示的实施例的描述，不多 赘述。其中，第二确定单元503～第四确定单元505在图5中一并示出，但需要知道的是，第二确定单元503～第四确定单元505并不是必选的功能模块，因此在图5中以虚线示出。
基于同一发明构思，本发明实施例提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如图1所示的方法。
在具体的实施过程中，计算机可读存储介质包括：通用串行总线闪存盘(Universal Serial Bus flash drive，USB)、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的存储介质。
在本发明实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。例如，以上所描述的设备实施例仅仅是示意性的，例如，所述单元或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性或其它的形式。
在本发明实施例中的各功能单元可以集成在一个处理单元中，或者各个单元也可以均是独立的物理模块。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备，例如可以是个人计算机，服务器，或者网络设备等，或处理器(processor)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：通用串行总线闪存盘(universal serial bus flash drive)、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，以上实施例仅用以对本申请的技术方案进行了详细介绍，但以上实施例的说明只是用于帮助理解本发明实施例的方法，不应理解为对本发明实施例的限制。本技术领域的技术人员可轻易想到的变化或替换，都应涵盖在本发明实施例的保护范围之内。

Claims (31)

  1. 一种通知执行分组数据汇聚层协议PDCP数据恢复的方法，其特征在于，包括：
    主基站将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程。
  2. 如权利要求1所述的方法，其特征在于，在主基站将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程之前，所述方法还包括：
    所述主基站触发主基站内的主小区切换intra-MN handover流程或同无线接入网中心节点内主小区切换intra-CU handover流程，且所述主基站确定保持辅基站不变以及不需要进行安全密钥的更新。
  3. 如权利要求1所述的方法，其特征在于，所述节点间信令消息携带指示信息，所述指示信息通过X2/Xn AP消息的编码格式进行编码，或者，通过无线资源控制RRC消息的编码格式进行编码；其中，所述指示信息用于指示所述辅基站执行所述PDCP数据恢复流程。
  4. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述主基站通过所述节点间信令消息中新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
    所述主基站通过复用所述节点间信令消息中的第二字段携带所述指示信息；其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
  5. 如权利要求4所述的方法，其特征在于，若所述主基站和所述辅基站分别为多无线接入技术双连接MR-DC场景中的主基站和辅基站，则所述节点 间信令消息为所述主基站发起的辅基站修改流程中的辅基站修改请求消息。
  6. 如权利要求5所述方法，其特征在于，所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP修改指示信息PDCP change indication；其中，所述PDCP change indication在用于指示所述辅基站进行PDCP数据恢复时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同。
  7. 如权利要求1所述的方法，其特征在于，所述节点间信令消息为包括同步重配请求的消息，所述辅基站能够根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述辅基站能够确定执行所述PDCP数据恢复流程。
  8. 如权利要求1所述的方法，其特征在于，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程；其中，所述底层同步重配流程包括无线链路控制RLC实体重建流程、媒体接入控制MAC实体重置流程和随机接入过程中的一个或者多个流程。
  9. 一种执行分组数据汇聚层协议PDCP数据恢复的方法，其特征在于，包括：
    辅基站接收主基站发送的节点间信令消息；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；
    所述辅基站根据所述节点间信令消息执行所述PDCP数据恢复流程。
  10. 如权利要求9所述的方法，其特征在于，
    所述节点间信令消息通过新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
    所述节点间信令消息通过复用的第二字段携带所述指示信息，其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
  11. 如权利要求10所述的方法，其特征在于，在所述辅基站根据所述节 点间信令消息执行所述PDCP数据恢复流程之前，所述方法还包括：
    所述辅基站确定所述第一字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；或者，
    所述辅基站确定所述第二字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；
    若确定结果为是，则所述辅基站确定执行所述PDCP数据恢复流程。
  12. 如权利要求10或11所述的方法，其特征在于，若所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP change indication，且所述PDCP change indication在用于指示所述辅基站执行PDCP数据恢复流程时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同；则所述方法还包括：
    若所述辅基站确定所述PDCP change indication存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值，则所述辅基站确定执行所述PDCP数据恢复流程；或者，
    若所述辅基站确定所述PDCP change indication存在用于指示所述辅基站执行安全密钥更新流程的有效值，则所述辅基站确定执行所述安全密钥更新流程。
  13. 如权利要求9所述的方法，其特征在于，所述节点间信令消息为包括同步重配请求的消息，则所述方法还包括：
    所述辅基站根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述辅基站能够确定执行所述PDCP数据恢复流程；
    在确定结果为是时，所述辅基站确定执行所述PDCP数据恢复流程。
  14. 如权利要求9所述的方法，其特征在于，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程，则所述方法还包括：
    所述辅基站根据所述节点间信令消息确定执行所述底层同步重配流程；其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
  15. 一种基站，其特征在于，该基站是双连接以及多连接的通信系统中的主基站，所述主基站包括：
    存储器，用于存储指令；
    处理器，用于读取所述存储器中的指令，执行下列过程：
    通过收发机将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；
    所述收发机，用于在所述处理器的控制下发送数据。
  16. 如权利要求15所述的基站，其特征在于，
    所述处理器，还用于在通过收发机将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程之前，触发所述主基站内的主小区切换intra-MN handover流程或同无线接入网中心节点内主小区切换intra-CU handover流程，且确定保持辅基站不变以及不需要进行安全密钥的更新。
  17. 如权利要求15所述的基站，其特征在于，所述节点间信令消息携带指示信息，所述指示信息通过X2/Xn AP消息的编码格式进行编码，或者，通过无线资源控制RRC消息的编码格式进行编码；其中，所述指示信息用于指示所述辅基站执行所述PDCP数据恢复流程。
  18. 如权利要求15所述的基站，其特征在于，所述处理器还用于：
    通过所述节点间信令消息中新定义的第一字段携带指示信息，所述指示信息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
    通过复用所述节点间信令消息中的第二字段携带所述指示信息；其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信 息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
  19. 如权利要求18所述的基站，其特征在于，若所述主基站和所述辅基站分别为MR-DC场景中的主基站和辅基站，则所述节点间信令消息为所述主基站发起的辅基站修改流程中的辅基站修改请求消息。
  20. 如权利要求19所述的基站，其特征在于，所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP change indication；其中，所述PDCP change indication在用于指示所述辅基站进行PDCP数据恢复时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同。
  21. 如权利要求15所述的基站，其特征在于，所述节点间信令消息为包括同步重配请求的消息，所述辅基站能够根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述辅基站能够确定执行所述PDCP数据恢复流程。
  22. 如权利要求15所述的基站，其特征在于，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程；其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
  23. 一种基站，其特征在于，该基站是双连接以及多连接的通信系统中的辅基站，所述辅基站包括：
    存储器，用于存储指令；
    处理器，用于读取所述存储器中的指令，执行下列过程：
    通过收发机接收主基站发送的节点间信令消息；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；
    根据所述节点间信令消息执行所述PDCP数据恢复流程；
    所述收发机，用于在所述处理器的控制下接收数据。
  24. 如权利要求23所述的基站，其特征在于，
    所述节点间信令消息通过新定义的第一字段携带指示信息，所述指示信 息用于指示所述辅基站执行PDCP数据恢复流程；其中，所述第一字段为可选属性或者必选属性的字段；或者，
    所述节点间信令消息通过复用的第二字段携带所述指示信息，其中，所述第二字段包括至少两种编码形式，且不同的编码形式用于携带不同的信息，所述至少两种编码形式中的一种编码形式用于携带所述指示信息。
  25. 如权利要求24所述的基站，其特征在于，所述处理器还用于：
    在所述处理器根据所述节点间信令消息执行所述PDCP数据恢复流程之前，确定所述第一字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；或者，确定所述第二字段是否存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值；
    若确定结果为是，则确定执行所述PDCP数据恢复流程。
  26. 如权利要求24或25所述的基站，其特征在于，若所述第二字段复用用于通知所述辅基站进行安全秘钥更新的PDCP change indication，且所述PDCP change indication在用于指示所述辅基站执行PDCP数据恢复流程时的编码形式与用于指示所述辅基站进行安全秘钥更新时的编码形式不同，则所述处理器还用于：
    若确定所述PDCP change indication存在用于指示所述辅基站执行所述PDCP数据恢复流程的有效值，则确定执行所述PDCP数据恢复流程；或者，
    若确定所述PDCP change indication存在用于指示所述辅基站执行安全密钥更新流程的有效值，则确定执行所述安全密钥更新流程。
  27. 如权利要求23所述的基站，其特征在于，所述节点间信令消息为包括同步重配请求的消息，则所述处理器还用于：
    根据所述同步重配请求确定是否执行所述PDCP数据恢复流程；其中，若所述同步重配请求中未携带更新后的安全密钥，或者，未携带指示所述辅基站进行安全密钥更新的信息，则所述处理器能够确定执行所述PDCP数据恢复流程；
    在确定结果为是时，确定执行所述PDCP数据恢复流程。
  28. 如权利要求23所述的基站，其特征在于，所述节点间信令消息还用于指示所述辅基站执行与所述PDCP数据恢复流程相对应的底层同步重配流程，则所述处理器还用于：
    根据所述节点间信令消息确定执行所述底层同步重配流程；其中，所述底层同步重配流程包括RLC实体重建流程、MAC实体重置流程和随机接入过程中的一个或者多个流程。
  29. 一种基站，其特征在于，该基站是双连接以及多连接的通信系统中的主基站，包括：
    发送单元，用于将所述主基站与辅基站之间的节点间信令消息发送给所述辅基站，以通知所述辅基站执行PDCP数据恢复流程；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程。
  30. 一种基站，其特征在于，该基站是双连接以及多连接的通信系统中的辅基站，包括：
    接收单元，用于接收主基站发送的节点间信令消息；其中，所述节点间信令消息用于指示所述辅基站执行PDCP数据恢复流程；
    执行单元，用于根据所述节点间信令消息执行所述PDCP数据恢复流程。
  31. 一种计算机可读存储介质，其特征在于：
    所述计算机可读存储介质存储有计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如权利要求1-14中任一项所述的方法。
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