WO2020088634A1 - 数据转发方法、装置、主基站及从基站 - Google Patents

数据转发方法、装置、主基站及从基站 Download PDF

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Publication number
WO2020088634A1
WO2020088634A1 PCT/CN2019/114964 CN2019114964W WO2020088634A1 WO 2020088634 A1 WO2020088634 A1 WO 2020088634A1 CN 2019114964 W CN2019114964 W CN 2019114964W WO 2020088634 A1 WO2020088634 A1 WO 2020088634A1
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Prior art keywords
base station
identity
data forwarding
data
flow
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PCT/CN2019/114964
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English (en)
French (fr)
Inventor
刘爱娟
张大钧
孙建成
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电信科学技术研究院有限公司
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Priority to EP19880068.2A priority Critical patent/EP3876599B1/en
Priority to JP2021523645A priority patent/JP7260640B2/ja
Priority to US17/290,689 priority patent/US20220022114A1/en
Priority to KR1020217015832A priority patent/KR102524596B1/ko
Publication of WO2020088634A1 publication Critical patent/WO2020088634A1/zh

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    • 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
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • 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
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • 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

Definitions

  • the present disclosure relates to the field of communication technology, and in particular, to a data forwarding method, device, master base station, and slave base station.
  • E-UTRAN Evolved Global Terrestrial Radio Access Network
  • eNodeBs 4G base stations
  • the eNodeB and EPC (4G packet core network) are connected through an S1 interface.
  • the UE terminal
  • the 5G system similarly, similar to the dual connection of the LTE system, it also supports tight coupling interworking (tight interworking) of eNodeB and gNB (5G base station) and dual connection of gNB and gNB.
  • the current specification supports switching from dual connectivity to dual connectivity and from single connectivity to dual connectivity during the switching process.
  • the architecture of the RAN (radio access network) side in the tight interworking scenario of eNodeB and gNB, there are mainly the following two cases, and the second scenario also includes NR-NR DC (5G base station dual connection).
  • NR-NR DC 5G base station dual connection
  • LTE is the primary base station and the 5G node is the secondary base station, connected to the core network (EPC) through the LTE base station, as shown in Figure 1
  • MME in the figure refers to the mobility management entity
  • S1-MME refers to the 4G base station Control plane interface between EPCs
  • X2 refers to the interface between eNB and gNB when eNB is connected to EPC
  • LTE MeNB refers to 4G master base station).
  • Both 5G nodes and LTE base stations are connected to the 5G core network (5GC).
  • 5GC 5G core network
  • NG refers to the interface between gNB and the access and mobility management function AMF
  • Xn refers to the interface between eNB and gNB when eNB and gNB are connected to 5GC
  • NR refers to the new air interface 5G base station
  • eNB Refers to the 4G base station.
  • a user plane connection (or user plane tunnel) with PDU session granularity is established on NG-U (NG interface user plane), a UE Multiple NG-U PDU sessions with granular user plane connections (or user plane tunnels) can be established at the same time.
  • one PDU session corresponds to one tunnel (tunnel).
  • multiple flows under one PDU session may be configured in the MN and SN, respectively.
  • the target base station determines whether the dual connection needs to be established according to the bearer information carried in the handover request message. If a dual connection needs to be established and there is a suitable SCG (Secondary cell group) cell, the target MN will initiate the SN addition process to the target SN. After receiving the response from the SN, the target MN sends a handover response message to the source base station.
  • SCG Secondary cell group
  • the target MN will provide the source MN with a PDU SESSION level (protocol data unit session level) data forwarding address. If the target MN decides to configure part of the SDAP (service data adaptation protocol) layer of a PDU session on the MN side, and part of the flow's SDAP layer is configured on the SN side, the corresponding flow data needs to be forwarded to the target MN node And the target SN node.
  • the current specification does not support this scenario.
  • the target MN decides to configure part of the SDAP layer of the flow in a PDU session in the MN, and the other part of the flow is configured in the SN scenario, the current specification cannot support direct data to the target SN Forwarding affects the performance during the handover process, resulting in a poor user experience.
  • the present disclosure provides a data forwarding method, device, master base station, and slave base station.
  • the target MN decides to configure part of the SDAP layer of a PDU session in the MN, and another part of the flow is configured in the SN scenario.
  • the problem of direct data forwarding to the target SN cannot be achieved.
  • the present disclosure provides a data forwarding method, which is applied to the first primary base station and includes:
  • the SDAP layer of the remaining number of flows is configured in the newly added slave base station node, and then sends a handover request response message carrying the first preset information to the second master base station;
  • the first preset information includes: a first identity identifier of all flows configured for the first master base station and a data forwarding address corresponding to the first identity identifier, and a first slave configured for the newly added slave The second identity of all flows of the base station and the data forwarding address corresponding to the second identity;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the data forwarding address is a PDU session-level data forwarding address for a preset PDU session.
  • the method further includes:
  • the present disclosure also provides a data forwarding method, which is applied to the second primary base station and includes:
  • the first preset information includes: the first identity identifier of all flows configured to the first master base station and the The data forwarding address corresponding to the first identity, and the second identity of all flows configured for the newly added first slave base station and the data forwarding address corresponding to the second identity;
  • the data forwarding is performed according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity ,include:
  • the flow corresponding to the acquired second identity is forwarded according to the data forwarding address corresponding to the acquired second identity.
  • the data forwarding is performed according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity ,include:
  • the data forwarding address corresponding to the first identity identifier, the second identity identifier, and the data forwarding address corresponding to the second identity identifier ,Also includes:
  • the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity send 2. Request for releasing the preset information from the base station;
  • the second preset information includes: the flow identity of the service data adaptation protocol SDAP layer in the flow corresponding to the first identity and / or the second identity in the flow of the second slave base station and the The data forwarding address corresponding to the identification;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the slave base station sends a slave base station release request carrying the second preset information, including:
  • the present disclosure also provides a data forwarding method, which is applied to the second slave base station and includes:
  • the second preset information includes: the service data in the flow corresponding to the first identity and / or the second identity A protocol identification ID of the flow of the SDAP layer in the second slave base station and a data forwarding address corresponding to the identity identification;
  • the first identity identifier is an identity identifier of flow configured for the first master base station
  • the second identity identifier is an identity identifier of flow configured for the newly added first slave base station
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward the first slave The base station forwards the data.
  • the data forwarding according to the identity identifier and the data forwarding address includes:
  • the present disclosure also provides a data forwarding method, which is applied to the first slave base station and includes:
  • the present disclosure also provides a first main base station, which includes a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor implements the program when implemented The following steps:
  • the transceiver After receiving the handover request message sent by the second master base station through the transceiver, if it is determined to add a new slave base station node, and it is determined that the preset protocol data unit session PDU session part of the number of flow service data adaptation protocol SDAP The layer is configured in the master base station node, and the remaining number of flow SDAP layers are configured in the newly added slave base station node, and then a handover request response message carrying first preset information is sent to the second master base station through the transceiver;
  • the first preset information includes: a first identity identifier of all flows configured for the first master base station and a data forwarding address corresponding to the first identity identifier, and a first slave configured for the newly added slave The second identity of all flows of the base station and the data forwarding address corresponding to the second identity;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the data forwarding address is a PDU session-level data forwarding address for a preset PDU session.
  • the processor is also used to:
  • the data directly forwarded by the second master base station and / or the second slave base station is received through the transceiver.
  • the present disclosure also provides a second primary base station, including a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor implements the program when implemented The following steps:
  • the transceiver Receiving, by the transceiver, a handover request response message carrying first preset information sent by the first master base station; wherein, the first preset information includes: the first of all flows configured to the first master base station An identity identifier and a data forwarding address corresponding to the first identity identifier, and a second identity identifier of all flows configured for the newly added first slave base station and a data forwarding address corresponding to the second identity identifier;
  • the processor is specifically used to:
  • transceiver Using the transceiver to forward the flow corresponding to the acquired first identity according to the data forwarding address corresponding to the acquired first identity; and / or
  • the transceiver is used to forward the flow corresponding to the obtained second identity.
  • the processor is specifically used to:
  • the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity The first master base station and / or the first slave base station.
  • the processor is also used to:
  • the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity are sent to the second slave base station by the transceiver A request to release from the base station with second preset information;
  • the second preset information includes: the flow identity of the service data adaptation protocol SDAP layer in the flow corresponding to the first identity and / or the second identity in the flow of the second slave base station and the The data forwarding address corresponding to the identification;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the processor is specifically used to:
  • a slave base station release request carrying second preset information is sent to the second slave base station through the transceiver.
  • the present disclosure also provides a second slave base station, which includes a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor executes the program when implemented The following steps:
  • a slave base station release request carrying second preset information sent by a second master base station; wherein the second preset information includes: a stream corresponding to the first identity identifier and / or the second identity identifier the service ID of the service data adaptation protocol SDAP layer in the flow at the second slave base station and the data forwarding address corresponding to the ID;
  • the first identity identifier is an identity identifier of flow configured for the first master base station
  • the second identity identifier is an identity identifier of flow configured for the newly added first slave base station
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward the first slave The base station forwards the data.
  • the processor is specifically used to:
  • the transceiver is used to forward data to the first master base station and / or the first slave base station.
  • the present disclosure also provides a first slave base station, including a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor implements the program when implemented The following steps:
  • the example of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the data forwarding method described above are implemented.
  • the present disclosure also provides a data forwarding device, which is applied to the first primary base station and includes:
  • the first processing module is configured to, after receiving the handover request message sent by the second master base station, determine to add a new slave base station node, and determine to adapt the service data of the partial flow of the preset protocol data unit session PDU session
  • the protocol SDAP layer is configured at the master base station node, and the remaining number of flow SDAP layers are configured at the newly added slave base station node, and then a handover request response message carrying first preset information is sent to the second master base station;
  • the first preset information includes: a first identity identifier of all flows configured for the first master base station and a data forwarding address corresponding to the first identity identifier, and a first slave configured for the newly added slave The second identity of all flows of the base station and the data forwarding address corresponding to the second identity;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the data forwarding address is a PDU session-level data forwarding address for a preset PDU session.
  • Optional also includes:
  • the first receiving module is configured to receive data directly forwarded by the second master base station and / or the second slave base station after sending a handover request response message carrying first preset information to the second master base station.
  • the present disclosure also provides a data forwarding device, which is applied to the second primary base station and includes:
  • a second receiving module configured to receive a handover request response message carrying first preset information sent by the first master base station; wherein, the first preset information includes: all flows configured to the first master base station A first identity identifier and a data forwarding address corresponding to the first identity identifier, and a second identity identifier of all flows configured for the newly added first slave base station and a data forwarding address corresponding to the second identity identifier;
  • a second processing module configured to perform data according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity Forward.
  • the second processing module includes:
  • a first obtaining submodule configured to obtain a first identity identifier that matches the service identity identifier of the service data adaptation protocol SDAP layer in the flow of the second primary base station;
  • a first processing submodule configured to forward the flow corresponding to the acquired first identity according to the data forwarding address corresponding to the acquired first identity; and / or
  • a second acquiring submodule configured to acquire a second identity identifier that matches the identity identity of the flow of the SDAP layer at the second primary base station;
  • the second processing submodule is configured to forward the flow corresponding to the acquired second identity according to the data forwarding address corresponding to the acquired second identity.
  • the second processing module includes:
  • the third processing submodule is configured to, based on the first identity identifier, the data forwarding address corresponding to the first identity identifier, the second identity identifier, and the data forwarding address corresponding to the second identity identifier, The data is forwarded to the first master base station and / or the first slave base station.
  • Optional also includes:
  • the first sending module is configured to perform the process based on the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity Before data forwarding, according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity, to the second slave base station Send a slave base station release request carrying the second preset information;
  • the second preset information includes: the flow identity of the service data adaptation protocol SDAP layer in the flow corresponding to the first identity and / or the second identity in the flow of the second slave base station and the The data forwarding address corresponding to the identification;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the first sending module includes:
  • the third obtaining submodule is used to obtain the flow ID of the SDAP layer in the flow of the second slave base station in the flow corresponding to the first ID and / or the second ID and the data forwarding corresponding to the ID address;
  • the first sending submodule is configured to send a slave base station release request carrying second preset information to the second slave base station according to the identity identifier and the data forwarding address corresponding to the identity identifier.
  • the present disclosure also provides a data forwarding device applied to the second slave base station, including:
  • a third receiving module configured to receive a slave base station release request carrying second preset information sent by the second master base station; wherein, the second preset information includes: a first identity and / or a second identity The service data adaptation protocol SDAP layer of the flow in the flow of the second slave base station's flow identity and the data forwarding address corresponding to the identity;
  • a third processing module configured to forward data according to the identity identifier and the data forwarding address
  • the first identity identifier is an identity identifier of flow configured for the first master base station
  • the second identity identifier is an identity identifier of flow configured for the newly added first slave base station
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward the first slave The base station forwards the data.
  • the third processing module includes:
  • the fourth processing submodule is configured to forward data to the first master base station and / or the first slave base station according to the identity identifier and the data forwarding address.
  • the present disclosure also provides a data forwarding device applied to the first slave base station, including:
  • the fourth receiving module is configured to receive data directly forwarded by the second master base station and / or the second slave base station.
  • the data forwarding method determines that a new slave base station node is newly added, and determines that the preset protocol data unit session PDU session part of the number of flow services
  • the data adaptation protocol SDAP layer is configured at the master base station node, and the remaining number of flow SDAP layers are configured at the newly added slave base station node, and then a handover request response message carrying first preset information is sent to the second master base station;
  • the first preset information includes: a first identity identifier of all flows allocated to the first master base station and a data forwarding address corresponding to the first identity identifier, and a newly allocated first slave base station
  • the data forwarding address corresponding to the first identity is the first tunnel address, and the first tunnel address is used to
  • the first primary base station forwards data;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel address is used to
  • the target base station decides to add an SN node and decides to add a part of the SDAP layer of the PDU session flow Configured in MN, part of the flow configuration in the SN scenario can support direct data forwarding to the target SN; it is a good solution in the related technology that the target MN decides to configure the SDAP layer of part of the flow in a PDU session in the MN, The other part of the flow is configured in the SN scenario, and the problem of direct data forwarding to the target SN cannot be achieved.
  • Figure 1 is a schematic diagram of the eNodeB and gNB interworking architecture in the related art
  • Figure 2 is a schematic diagram of the eNodeB and gNB interworking and NR-NR DC architecture in the related art
  • FIG. 3 is a schematic flowchart 1 of a data forwarding method according to some embodiments of the present disclosure
  • FIG. 4 is a second schematic flowchart of a data forwarding method according to some embodiments of the present disclosure.
  • FIG. 5 is a schematic flowchart 3 of a data forwarding method according to some embodiments of the present disclosure.
  • FIG. 6 is a fourth schematic flowchart of a data forwarding method according to some embodiments of the present disclosure.
  • FIG. 7 is a schematic flowchart 1 of a specific application process of a data forwarding method according to some embodiments of the present disclosure
  • FIG. 8 is a second schematic flowchart of a specific application of a data forwarding method according to some embodiments of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a first primary base station according to some embodiments of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a second primary base station according to some embodiments of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a second slave base station according to some embodiments of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a first slave base station according to some embodiments of the present disclosure.
  • FIG. 13 is a schematic structural diagram 1 of a data forwarding device according to some embodiments of the present disclosure.
  • FIG. 14 is a second schematic structural diagram of a data forwarding device according to some embodiments of the present disclosure.
  • 15 is a schematic structural diagram 3 of a data forwarding device according to some embodiments of the present disclosure.
  • 16 is a fourth structural diagram of a data forwarding device according to some embodiments of the present disclosure.
  • a data forwarding method is applied to the first master base station (specifically, it can be the target master base station MN in a dual connectivity scenario, but not limited to this), as shown in FIG. 3, including:
  • Step 31 After receiving the handover request message sent by the second master base station, if it is determined that the slave base station node is newly added, and it is determined that the preset protocol data unit session PDU session part of the number of flow service data adaptation protocol SDAP layer configuration At the master base station node, the remaining number of flow SDAP layers are configured at the newly added slave base station node, and then a handover request response message carrying first preset information is sent to the second master base station;
  • the first preset information includes: a first identity identifier of all flows configured for the first master base station and a data forwarding address corresponding to the first identity identifier, and a first slave configured for the newly added slave The second identity of all flows of the base station and the data forwarding address corresponding to the second identity;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the data forwarding method after receiving the handover request message sent by the second master base station, if it is determined to add a new slave base station node, and it is determined that the preset protocol data unit session PDU part of the number of streams will be determined
  • the flow service data adaptation protocol SDAP layer is configured at the master base station node, and the remaining number of flow SDAP layers are configured at the newly added slave base station node, and then a handover request response carrying the first preset information is sent to the second master base station Message; wherein, the first preset information includes: a first identity identifier of all flows configured for the first primary base station and a data forwarding address corresponding to the first identity identifier, and a new A second identity identifier of all flows from the base station and the data forwarding address corresponding to the second identity identifier; the data forwarding address corresponding to the first identity identifier are both the first tunnel address and the first tunnel address For forwarding data to the first primary base station; the data forwarding addresses
  • the target base station decides to add an SN node and decides to transfer
  • the SDAP layer of the partial flow is configured in the MN, and the configuration of the partial flow is in the SN scenario, which can support direct data forwarding to the target SN; it is a good solution in the related technology.
  • the target MN decides to transfer the SDAP of a partial flow in a PDU session In the scenario where the layer is configured in the MN and the other part of the flow is configured in the SN, the problem of direct data forwarding to the target SN cannot be achieved.
  • the data forwarding address is a PDU session-level data forwarding address for a preset PDU session.
  • the method further includes: receiving data directly forwarded by the second master base station and / or the second slave base station.
  • Some embodiments of the present disclosure also provide a data forwarding method, which is applied to the second master base station (specifically, it may be a source base station in a single connection scenario or a source master base station MN in a dual connection scenario, but it is not limited thereto) , As shown in Figure 4, including:
  • Step 41 Receive a handover request response message carrying first preset information sent by the first master base station; wherein, the first preset information includes: a first identity identifier of all flows configured to the first master base station And a data forwarding address corresponding to the first identity identifier, and a second identity identifier of all flows configured for the newly added first slave base station and a data forwarding address corresponding to the second identity identifier;
  • Step 42 Perform data forwarding according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity.
  • the data forwarding method receives the handover request response message carrying the first preset information sent by the first master base station; wherein, the first preset information includes: configured for the first master The first identity of all flows of the base station and the data forwarding address corresponding to the first identity, and the second identity of all flows configured for the newly added first slave base station and the second identity Corresponding data forwarding address; forwarding data according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity It can support the realization that during the handover process, the target base station can provide two tunnel addresses for a PDU session.
  • the target base station decides to add an SN node and decides to configure the SDAP layer of part of the flow under a PDU session in the MN.
  • Part of the flow configuration can support direct data forwarding to the target SN in the SN scenario; a good solution to related technologies MN decides to target a portion of the flow of SDAP PDU session layer disposed MN, additional flow portion disposed at SN scenario, the problem can not be achieved to the target SN direct data forwarding.
  • the data forwarding according to the first identity identifier, the data forwarding address corresponding to the first identity identifier, the second identity identifier, and the data forwarding address corresponding to the second identity identifier includes: : Obtaining a first identity that matches the flow identity of the service data adaptation protocol SDAP layer in the flow of the second primary base station; according to the data forwarding address corresponding to the acquired first identity, the first Forwarding the flow corresponding to an identity; and / or acquiring a second identity that matches the identity of the flow of the SDAP layer at the second primary base station; forwarding data according to the acquired second identity The address forwards the flow corresponding to the obtained second identity.
  • the data forwarding is performed according to the first identity identifier, the data forwarding address corresponding to the first identity identifier, the second identity identifier, and the data forwarding address corresponding to the second identity identifier, It includes: forwarding the data to the first identity according to the first identity, the data forwarding address corresponding to the first identity, the second identity and the data forwarding address corresponding to the second identity A master base station and / or a first slave base station.
  • the data forwarding address when the second primary base station is the source MN, according to the first identity identifier, the data forwarding address corresponding to the first identity identifier, the second identity identifier, and the second identity identifier
  • the data forwarding address, before data forwarding further includes: according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data corresponding to the second identity Forward the address, and send to the second slave base station a slave base station release request carrying second preset information; wherein the second preset information includes: in the flow corresponding to the first identity and / or the second identity
  • the data forwarding address corresponding to the first identity is the first tunnel address,
  • the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second Track address for forwarding the first data from the base station.
  • the The base station sending a slave base station release request carrying the second preset information includes: acquiring the flow identity of the SDAP layer in the flow of the second slave base station in the flow corresponding to the first identity and / or second identity A data forwarding address corresponding to the identity identifier; according to the identity identifier and the data forwarding address corresponding to the identity identifier, a slave base station release request carrying second preset information is sent to the second slave base station.
  • Some embodiments of the present disclosure also provide a data forwarding method, which is applied to the second slave base station (specifically, the source slave base station SN in a dual connection scenario, but not limited to this), as shown in FIG. 5, including :
  • Step 51 Receive a slave base station release request that carries second preset information sent by the second master base station; where the second preset information includes: the flow corresponding to the first identity and / or the second identity The service data adaptation protocol SDAP layer's flow identity in the second slave base station and the data forwarding address corresponding to the identity;
  • Step 52 Perform data forwarding based on the identity identification and data forwarding address
  • the first identity identifier is an identity identifier of flow configured for the first master base station
  • the second identity identifier is an identity identifier of flow configured for the newly added first slave base station
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward the first slave The base station forwards the data.
  • the data forwarding method receives a slave base station release request carrying second preset information sent by a second master base station; wherein, the second preset information includes: a first identity and / or Or the service ID of the service data adaptation protocol SDAP layer in the flow corresponding to the second ID, the flow ID of the second slave base station, and the data forwarding address corresponding to the ID; based on the ID and the data forwarding address For data forwarding; wherein, the first identity identifier is an identity identifier of flow configured for the first master base station, and the second identity identifier is an identity identifier of flow configured for the newly added first slave base station;
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward to the first slave base station Data; can support the realization that during the handover process, the target base station can provide two tunnel addresses for a PDU session, so that the target base station decides
  • the data forwarding according to the identity identifier and the data forwarding address includes: forwarding data to the first master base station and / or the first slave base station according to the identity identifier and the data forwarding address.
  • Some embodiments of the present disclosure also provide a data forwarding method, which is applied to the first slave base station (which may be specifically the target slave base station SN in the dual-connection scenario, but not limited to this), as shown in FIG. 6, including :
  • Step 61 Receive data directly forwarded by the second master base station and / or the second slave base station.
  • the data forwarding method provided by some embodiments of the present disclosure can receive data directly forwarded by the second master base station and / or the second slave base station; it can support the realization that during the handover process, the target base station can provide two tunnel addresses for one PDU session In this way, the target base station decides to add an SN node, and decides to configure part of the SDAP layer of the flow under a PDU session in the MN, and part of the flow configuration in the SN scenario can support direct data forwarding to the target SN; It is a good solution to the problem that in the related technology, the target MN decides to configure part of the SDAP layer of the flow in a PDU session in the MN, and the other part of the flow is configured in the SN scenario, which cannot achieve the direct data forwarding to the target SN.
  • the data forwarding methods provided by some embodiments of the present disclosure will be further described below in combination with the first master base station, the second master base station, the second slave base station, the first slave base station, and other sides.
  • some embodiments of the present disclosure provide a data forwarding method, mainly including:
  • the target master base station receives a handover request from the source base station, it decides to add a new SN node, and decides to put a part of the flow in a PDU session
  • the SDAP layer is configured on the MN node, and the other part of the flow's SDAP layer is configured on the SN node (it can be distributed according to the load of the target MN and the target SN in the dual connection scenario); in this case, the target MN sends two A PDU session level data forwarding address (respectively the tunnel assigned by the target MN and the tunnel assigned by the target SN), each tunnel corresponds to a flow list, indicating that all flow data in the list needs to be forwarded to this address. Based on the information, the source base station forwards the corresponding flow data (which needs to be forwarded) to the target MN and / or target SN (that is, the source base station can directly forward the data to the target M
  • the target master base station receives a handover request from the source master base station, it decides to add a new SN node, and decides to put part of the SDAP flow in a PDU session
  • the layer is configured at the MN node
  • the SDAP layer of another part of the flow is configured at the SN node (it can be distributed according to the load of the target MN and the target SN); in this case, the target MN sends two PDUs to the source MN session level data forwarding Address (respectively the tunnel assigned by the target MN and the tunnel assigned by the target SN), each tunnel corresponds to a flow list, indicating that all flow data in the list needs to be forwarded to this address.
  • the source MN and / or source SN forwards the corresponding flow (required forwarding) data to the target MN and / or target SN (that is, the source MN can directly forward the data to the target MN and / or target SN, and / or Or, the source SN may directly forward the data to the target MN and / or the target SN).
  • the source side as a dual-connection scenario
  • the specific first primary base station uses the target primary base station MN in the dual-connection scenario as an example
  • the second primary base station uses the dual-connection scenario as an example.
  • the source master base station MN is taken as an example
  • the second slave base station takes the source slave base station SN in the dual connectivity scenario as an example
  • the first slave base station takes the target slave base station SN in the dual connectivity scenario as an example).
  • Example 1 Assuming that the terminal UE is in dual connectivity, the serving base station (source master base station) of the UE initiates the Xn handover process according to the measurement report, and the target master base station decides to add a new SgNB based on its own load and the measurement report of the UE. For PDU session 1 (contains four flows), the target MN decides to configure flow 1 and 2 in MN, and flow 3 and 4 in SN.
  • the solutions provided by some embodiments of the present disclosure may specifically include:
  • Step 71 The source master base station (source / MN) sends a handover request Handover Request message to the target master base station (target / MN).
  • Step 72 The target MN sends a slave base station addition request SgNB Addition Request to the target slave base station (target / SN).
  • the target MN decides to add a new SN node according to its own LOAD (load), etc., where flow 1 and 2 of PDU session1 are configured at the MN node, and flow 3 and 4 are configured at the SN node.
  • the SDAP layers of flow 1, 2, 3, and 4 may be at the source MN or the source SN, which is not limited herein.
  • Step 73 The target SN feeds back the target MN an increase request response SgNB Addition Request Ack from the base station.
  • the target SN may provide the data forwarding address of the PDU session 1 (this address is the address to forward data to the target SN, which may specifically be a tunnel in step 74).
  • Step 74 The target MN feeds back the handover request response Handover Request Acknowledge to the source MN (two PDU session level tunnels are configured for the PDU session 1).
  • the target MN provides two PDU session level data forwarding tunnels for PDU session1 in the handover request ACK message to the source MN, and also provides a flow list corresponding to each tunnel (specifically, an idle tunnel can be assigned ID.
  • the ID recorded in the handover request ACK message can be flow ID, which flows correspond to a tunnel).
  • Step 75a The source MN sends a slave base station release request SgNB Release Request to the source slave base station (source / SN / source SN).
  • the source MN seeks to release the source SN, and provides the data forwarding address (specifically, the tunnel assigned to the source SN and the corresponding flow list).
  • the source MN determines whether each flow is at the source SN or the source MN, and for the flow at the source SN of the SDAP layer, forwards the data forwarding address corresponding to the flow to the source SN.
  • Step 75b The source SN feeds back the source MN a request to release request response from the base station SgNB Release Request Acknowledge.
  • Step 76 The source MN sends a radio resource control connection reconfiguration RRC Connection Reconfiguration message to the UE.
  • Step 77 A random access procedure Random Access Procedure is entered between the UE and the target MN.
  • Step 78 The UE sends a RRC Connection Reconfiguration Complete message to the target MN.
  • steps 77 and 78 that is, the UE initiates a random access procedure to the target MN, the UE synchronizes with the target MN, and responds to the RRC Connection Reconfiguration Complete message.
  • Step 79 A random access procedure Random Access Procedure is entered between the UE and the target SN.
  • the UE synchronizes to the target SN.
  • Step 710 The target MN sends to the target SN a SgNB Reconfiguration Complete message from the base station.
  • the target MN notifies the target SN through the SgNB Reconfiguration Complete message.
  • Step 711a The source SN sends the secondary node data volume report Secondary RAT Data Volume Report to the source MN.
  • Step 711b The source MN sends the secondary node report Secondary Report to the mobility management entity MME.
  • Step 712 The source MN sends a serial number status transfer SN Status Transfer message to the target MN.
  • Step 713 The source MN performs data forwarding, and / or the source SN performs data forwarding; the S-GW in the figure represents a serving gateway, and the source MN forwards data to the target MN for illustration only, and the data may also be forwarded to the target SN, and the source SN toward the target
  • the SN forwarding data is only an indication, and data can also be forwarded to the target MN, which is not limited herein.
  • the data forwarding from the source MN begins, and the data forwarding from the source SN also begins: the source MN can directly forward the data to the target MN and / or the target SN, and the source SN can also directly forward the data To the target MN and / or target SN.
  • Step 714 The target MN sends a path switching request Path Switch Request to the MME.
  • Step 715 The S-GW and the MME interact with each other to perform bearer modification.
  • Step 716a The S-GW sends a new path (split / MCG bearer) message to the target MN.
  • Step 716b The S-GW sends a new path (split / slave cell group bearer) New Path (split / SCG bearer) message to the target SN.
  • Step 717 The MME feeds back the path switching request response Path Switch Request Acknowledge to the target MN.
  • steps 714 to 717 that is, the target MN initiates the S1 path update process, where S1 refers to the S1 interface, and the S1 interface is the interface between the LTE eNodeB (base station) and the EPC (packet core network).
  • S1 refers to the S1 interface
  • the S1 interface is the interface between the LTE eNodeB (base station) and the EPC (packet core network).
  • Step 718 The target MN sends a terminal context release UE Context Release message to the source MN.
  • the target MN initiates the UE Context Release process to the source MN.
  • Step 719 The source MN sends a terminal context release UE Context Release message to the source SN.
  • the source SN receives the UE CONTEXT RELEASE message, it will release the resources of the air interface and the control plane, and the data forwarding can continue to be performed.
  • Example 2 Assuming that the UE is in dual connectivity, the serving base station of the UE initiates the NG handover process according to the measurement report, and the target base station decides to add a new SgNB based on its own load and the measurement report of the UE. For PDU session 1 (contains four flows), MN decided to configure flow 1 and 2 in MN, and flow 3 and 4 in SN.
  • the solutions provided by some embodiments of the present disclosure may specifically include:
  • Step 81 The source master base station (source / MN) sends a handover application Handover Required message to the mobility management entity MME.
  • Step 82 The MME sends a handover request Handover Request message to the target master base station (target / MN).
  • Step 83 The target MN sends a slave base station addition request SgNB to the target slave base station (target / SN).
  • the target MN decides to add a new SN node according to its own LOAD, etc., where flow 1 and 2 of PDU session1 are configured on the MN node, and flow 3 and 4 are configured on the SN node.
  • the SDAP layers of flow 1, 2, 3, and 4 may be at the source MN or the source SN, which is not limited herein.
  • Step 84 The target SN feeds back the target MN an increase request response from the base station SgNB Addition Request Ack.
  • the target SN may provide the data forwarding address of the PDU session 1 (this address is the address to forward data to the target SN, which may specifically be a tunnel in step 85).
  • Step 85 The target MN feeds back the handover request response Handover Request Acknowledge to the MME (two PDU session level tunnels are configured for the PDU session 1).
  • the target MN provides two PDU session level data forwarding tunnels for PDU session1 in the MME handover request ACK message, and also provides a flow list corresponding to each tunnel (specific idle tunnel ID can be assigned The flow ID recorded in the handover request ACK message can correspond to which flow corresponds to a tunnel).
  • Step 86 The MME sends a handover command Handover Command to the source MN (two PDU session level tunnels are configured for PDU session1).
  • the MME provides two PDU session level data forwarding tunnels for PDU session1 in the Handover Command to the source MN, and also provides a flow list (specific Handover Command message corresponding to each tunnel) corresponding to each tunnel. It is flow ID, which flow corresponds to a tunnel).
  • Step 87a The source MN sends a slave base station release request SgNB Release Request to the source slave base station (source / SN / source SN).
  • the source MN requests to release the source SN, and provides the data forwarding address (specifically, the tunnel assigned to the source SN and the corresponding flow list).
  • the source MN determines whether each flow is at the source SN or the source MN, and for the flow at the source SN of the SDAP layer, forwards the data forwarding address corresponding to the flow to the source SN.
  • Step 87b The source SN feeds back the source MN a request to release request response from the base station SgNB Release Request Acknowledge.
  • Step 88 The source MN sends a radio resource control connection reconfiguration RRC Connection Reconfiguration message to the UE.
  • Step 89 A random access procedure Random Access Procedure is entered between the UE and the target MN.
  • Step 810 The UE sends a RRC Connection Reconfiguration Complete message to the target MN.
  • steps 89 and 810 that is, the UE initiates a random access procedure to the target MN, the UE synchronizes with the target MN, and responds to the RRC Connection Reconfiguration Complete message.
  • Step 811 A random access procedure Random Access Procedure is entered between the UE and the target SN.
  • the UE synchronizes to the target SN.
  • Step 812 The target MN sends to the target SN a SgNB Reconfiguration Complete message from the base station.
  • the target MN notifies the target SN through the SgNB Reconfiguration Complete message.
  • Step 813a The source SN sends the secondary node data volume report Secondary RAT Data Volume Report to the source MN.
  • Step 813b The source MN sends the secondary node report Secondary RAT Report to the MME.
  • Step 814 The source MN sends a serial number status transfer SN Status Transfer message to the MME.
  • Step 815 The source MN performs data forwarding, and / or the source SN performs data forwarding; the S-GW in the figure represents a serving gateway, and the source MN forwards data to the target MN for illustration only, and may also forward data to the target SN, and the source SN may forward the data
  • the SN forwarding data is only an indication, and data can also be forwarded to the target MN, which is not limited herein.
  • data forwarding from the source MN begins, and data forwarding from the source SN also begins: the source MN can directly forward the data to the target MN and / or target SN, and the source SN can also directly forward the data To the target MN and / or target SN.
  • Step 816 The target MN sends a handover notification Handover Notify to the MME.
  • Step 817 The S-GW and the MME interact with each other to perform bearer modification.
  • Step 818a The S-GW sends a new path (split / MCG bearer) message to the target MN.
  • Step 818b The S-GW sends a new path (split / slave cell group bearer) New Path (split / SCG bearer) message to the target SN.
  • the target MN initiates the S1 path update process.
  • Step 819 The target MN sends a terminal context release UE Context Release message to the source MN.
  • the target MN initiates the UE Context Release process to the source MN.
  • Step 820 The source MN sends a terminal context release UE Context Release message to the source SN.
  • the source SN receives the UE CONTEXT RELEASE message, it will release the resources of the air interface and the control plane, and the data forwarding can continue to be performed.
  • the target MN carries two PDU SESSION LEVEL addresses for one PDU session in the handover response message sent to the source base station in the single-connection scenario (or the source MN in the dual-connection scenario), while carrying each address Corresponding flow ID;
  • the source MN will judge whether each flow is in the source SN or the source MN. For the flow in the source SN of the SDAP layer, forward the data forwarding address corresponding to the flow to the SN.
  • the solutions provided by some embodiments of the present disclosure provide that during the handover process, the target MN may provide two PDU session level tunnel addresses for one PDU session. In this way, the target MN decides to add an SN node and decides to add
  • the SDAP layer of the partial flow under a PDU session is configured in the MN, and the partial flow is configured in the SN scenario, which can support direct data forwarding to the target SN.
  • Some embodiments of the present disclosure also provide a first primary base station, including a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor executes the The program implements the following steps:
  • the transceiver After receiving the handover request message sent by the second master base station through the transceiver, if it is determined to add a new slave base station node, and it is determined that the preset protocol data unit session PDU session part of the number of flow service data adaptation protocol SDAP The layer is configured in the master base station node, and the remaining number of flow SDAP layers are configured in the newly added slave base station node, and then a handover request response message carrying first preset information is sent to the second master base station through the transceiver;
  • the first preset information includes: a first identity identifier of all flows configured for the first master base station and a data forwarding address corresponding to the first identity identifier, and a first slave configured for the newly added slave The second identity of all flows of the base station and the data forwarding address corresponding to the second identity;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the first master base station After receiving the handover request message sent by the second master base station through the transceiver, the first master base station provided in some embodiments of the present disclosure determines that a new slave base station node is added, and determines that the preset protocol data unit session PDU session Part of the number of flow flow service data adaptation protocols SDAP layer is configured at the master base station node, the remaining amount of flow SDAP layer is configured at the newly added slave base station node, then sent to the second master base station through the transceiver A handover request response message carrying first preset information; wherein, the first preset information includes: a first identity identifier of all flows configured for the first primary base station and data corresponding to the first identity identifier The forwarding address, and the second identity identifiers of all flows configured for the newly added first slave base station and the data forwarding addresses corresponding to the second identity identifiers; the data forwarding addresses corresponding to the first identity identifiers are the first A tunnel address, the first tunnel address is used to forward data to the first primary base
  • the first primary base station of some embodiments of the present disclosure includes:
  • the transceiver 94 After receiving the handover request message sent by the second master base station through the transceiver 94, if it is determined that a new slave base station node is newly added, and the service data adaptation protocol of the partial flow of the preset protocol data unit session PDU session is determined
  • the SDAP layer is configured at the master base station node, and the remaining number of flow SDAP layers are configured at the newly added slave base station node, and then a handover request response message carrying first preset information is sent to the second master base station through the transceiver 94 ;
  • the first preset information includes: a first identity identifier of all flows configured for the first master base station and a data forwarding address corresponding to the first identity identifier, and a first slave configured for the newly added slave The second identity of all flows of the base station and the data forwarding address corresponding to the second identity;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the transceiver 94 is connected to the bus interface 92 for receiving and sending data under the control of the processor 91.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 91 and various circuits of the memory represented by the memory 93 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the transceiver 94 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium.
  • the processor 91 is responsible for managing the bus architecture and general processing, and the memory 93 may store data used by the processor 91 when performing operations.
  • the data forwarding address is a PDU session-level data forwarding address for a preset PDU session.
  • the processor is further configured to: after sending the handover request response message carrying the first preset information to the second master base station, receive the second master base station and / or the second slave base station through the transceiver Directly forwarded data.
  • the above-mentioned implementation embodiments of the data forwarding method on the first primary base station side are all applicable to the embodiments of the first primary base station, and can also achieve the same technical effect.
  • Some embodiments of the present disclosure also provide a second primary base station, including a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor executes the The program implements the following steps:
  • the transceiver Receiving, by the transceiver, a handover request response message carrying first preset information sent by the first master base station; wherein, the first preset information includes: the first of all flows configured to the first master base station An identity identifier and a data forwarding address corresponding to the first identity identifier, and a second identity identifier of all flows configured for the newly added first slave base station and a data forwarding address corresponding to the second identity identifier;
  • the second master base station receives a handover request response message carrying first preset information sent by the first master base station through the transceiver; where the first preset information includes: configured to The first identity of all flows of the first master base station and the data forwarding address corresponding to the first identity, and the second identity of all flows configured for the newly added first slave base station A data forwarding address corresponding to the second identity; based on the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding corresponding to the second identity Address, data forwarding through the transceiver; can support the realization that during the handover process, the target base station can provide two tunnel addresses for a PDU session, so that the target base station decides to add an SN node and decides to transfer a PDU session
  • the SDAP layer of the partial flow is configured in the MN, and the partial flow is configured in the SN scenario, which can support direct data to the target SN forwa rding; It is a good solution
  • the second primary base station in some embodiments of the present disclosure includes:
  • the transceiver 104 Receiving, by the transceiver 104, a handover request response message carrying first preset information sent by the first master base station; wherein, the first preset information includes: the first flow of all flows configured for the first master base station An identity identifier and a data forwarding address corresponding to the first identity identifier, and a second identity identifier of all flows allocated to the newly added first slave base station and a data forwarding address corresponding to the second identity identifier;
  • the transceiver 104 is connected to the bus interface 102 for receiving and sending data under the control of the processor 101.
  • the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors represented by the processor 101 and various circuits of the memory represented by the memory 103 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the transceiver 104 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium.
  • the processor 101 is responsible for managing the bus architecture and general processing, and the memory 103 may store data used by the processor 101 in performing operations.
  • the processor is specifically configured to: obtain a first identity that matches the flow identity of the service data adaptation protocol SDAP layer in the flow of the second primary base station; according to the acquired first identity A data forwarding address, using the transceiver to forward the flow corresponding to the acquired first identity; and / or acquiring a second identity that matches the identity of the flow of the SDAP layer at the second primary base station Using the transceiver to forward the flow corresponding to the acquired second identity according to the data forwarding address corresponding to the acquired second identity.
  • the processor is specifically configured to: forward the data according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data corresponding to the second identity Address, using the transceiver to forward data to the first master base station and / or the first slave base station.
  • the processor is further configured to: according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data corresponding to the second identity Forwarding the address, before forwarding the data, according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity, by The transceiver sends a secondary base station release request carrying second preset information to the second secondary base station; wherein the second preset information includes: flow corresponding to the first identity identifier and / or the second identity identifier
  • the service data adaptation protocol SDAP layer 's flow identity in the second slave base station and the data forwarding address corresponding to the identity; the data forwarding address corresponding to the first identity are the first tunnel address ,
  • the first tunnel address is used to forward data to the first primary base station; the data forwarding addresses corresponding to the second identity are all second tunnel addresses.
  • the processor is specifically configured to: acquire the flow identity of the SDAP layer in the flow of the second slave base station in the flow corresponding to the first identity and / or the second identity, and correspond to the identity The data forwarding address of the server; according to the identity identifier and the data forwarding address corresponding to the identity identifier, a slave base station release request carrying second preset information is sent to the second slave base station through the transceiver.
  • the above-mentioned implementation embodiments of the data forwarding method on the second primary base station side are all applicable to the embodiments of the second primary base station, and can also achieve the same technical effect.
  • Some embodiments of the present disclosure also provide a second slave base station, including a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor executes the The program implements the following steps:
  • a slave base station release request carrying second preset information sent by a second master base station; wherein the second preset information includes: a stream corresponding to the first identity identifier and / or the second identity identifier the service ID of the service data adaptation protocol SDAP layer in the flow at the second slave base station and the data forwarding address corresponding to the ID;
  • the first identity identifier is an identity identifier of flow configured for the first master base station
  • the second identity identifier is an identity identifier of flow configured for the newly added first slave base station
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward the first slave The base station forwards the data.
  • the second slave base station receives, through the transceiver, a slave base station release request carrying second preset information sent by the second master base station; where the second preset information includes: The ID of the service data adaptation protocol SDAP layer in the flow corresponding to an identity and / or the second identity in the flow of the second slave base station and the data forwarding address corresponding to the identity; according to the identity An identifier and a data forwarding address, using the transceiver for data forwarding; wherein, the first identity identifier is an identity identifier of flow configured for the first primary base station, and the second identity identifier is the first identifier configured for the newly added first The identity of the flow of the slave base station; the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address It is used to forward data to the first slave base station; it can support that during the handover process, the target base station can provide two tunnel
  • Decided to add a SN node, and decided to configure the SDAP layer of part of the flow under a PDU session in the MN, and the configuration of part of the flow in the SN scenario can support direct data forwarding to the target SN; a good solution to related technologies
  • the target MN decides to configure the SDAP layer of part of the flow in a PDU session in the MN, and the other part of the flow is configured in the SN scenario.
  • the problem of direct data forwarding to the target SN cannot be achieved.
  • the second slave base station of some embodiments of the present disclosure includes:
  • a processor 111 and a memory 113 connected to the processor 111 through a bus interface 112, the memory 113 is used to store programs and data used by the processor 111 when performing operations, when the processor 111 calls and When executing the programs and data stored in the memory 113, the following process is performed:
  • the transceiver 114 Receiving, by the transceiver 114, a slave base station release request carrying second preset information sent by a second master base station; wherein, the second preset information includes: the first identity and / or the second identity the service ID of the service data adaptation protocol SDAP layer in the flow at the second slave base station and the data forwarding address corresponding to the ID;
  • transceiver 114 Use the transceiver 114 to forward data according to the identity identifier and the data forwarding address;
  • the first identity identifier is an identity identifier of a flow configured for a first master base station
  • the second identity identifier is an identity identifier of a flow configured for a newly added first slave base station
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward the first slave The base station forwards the data.
  • the transceiver 114 is connected to the bus interface 112 for receiving and sending data under the control of the processor 111.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 111 and various circuits of the memory represented by the memory 113 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the transceiver 114 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium.
  • the processor 111 is responsible for managing the bus architecture and general processing, and the memory 113 may store data used by the processor 111 when performing operations.
  • the processor is specifically configured to: use the transceiver to forward data to the first master base station and / or the first slave base station according to the identity identifier and the data forwarding address.
  • Some embodiments of the present disclosure also provide a first slave base station, including a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor executes the The program implements the following steps:
  • the first slave base station receives data directly forwarded by the second master base station and / or the second slave base station through the transceiver; it can support the realization that during the handover process, the target base station can target one PDU session Provide two tunnel addresses.
  • the target base station decides to add an SN node, and decides to configure part of the SDAP layer of the flow under a PDU session in the MN, and part of the flow configuration in the SN scenario can support the target SN.
  • Direct data forwarding it is a good solution in the related technology that the target MN decides to configure the SDAP layer of part of the flow in a PDU session in the MN, and the other part of the flow is configured in the SN scenario, which cannot achieve direct data to the target SN The problem of forwarding.
  • the first slave base station of some embodiments of the present disclosure includes:
  • a processor 121 and a memory 123 connected to the processor 121 through a bus interface 122, the memory 123 is used to store programs and data used by the processor 121 when performing operations, when the processor 121 calls and When executing the programs and data stored in the memory 123, the following process is performed:
  • the transceiver 124 is connected to the bus interface 122 for receiving and sending data under the control of the processor 121.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 121 and various circuits of the memory represented by the memory 123 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the transceiver 124 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium.
  • the processor 121 is responsible for managing the bus architecture and general processing, and the memory 123 may store data used by the processor 121 when performing operations.
  • Some embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, which when executed by the processor implements the steps of the data forwarding method on the first primary base station side; or
  • the implementation embodiments of the foregoing data forwarding method on the first master base station side, the second master base station side, the second slave base station side, and / or the first slave base station side are all applicable to the computer-readable storage medium embodiment In the same way, the same technical effect can be achieved.
  • Some embodiments of the present disclosure also provide a data forwarding device, which is applied to the first primary base station, as shown in FIG. 13, and includes:
  • the first processing module 131 is configured to, after receiving the handover request message sent by the second master base station, determine to add a new slave base station node, and determine to adapt the service data of the partial flow of the preset protocol data unit session PDU session
  • the configuration protocol SDAP layer is configured in the master base station node, and the remaining number of flow SDAP layers are configured in the newly added slave base station node, and then a handover request response message carrying first preset information is sent to the second master base station;
  • the first preset information includes: a first identity identifier of all flows configured for the first master base station and a data forwarding address corresponding to the first identity identifier, and a first slave configured for the newly added slave The second identity of all flows of the base station and the data forwarding address corresponding to the second identity;
  • the data forwarding addresses corresponding to the first identity are all first tunnel addresses, and the first tunnel address is used to forward data to the first primary base station;
  • the data forwarding addresses corresponding to the second identity are all second tunnel addresses, and the second tunnel addresses are used to forward data to the first slave base station.
  • the data forwarding device After receiving the handover request message sent by the second master base station, the data forwarding device provided in some embodiments of the present disclosure determines that the slave base station node is newly added and determines that the preset protocol data unit session PDU session part of the number of streams
  • the flow service data adaptation protocol SDAP layer is configured at the master base station node, and the remaining number of flow SDAP layers are configured at the newly added slave base station node, and then a handover request response carrying the first preset information is sent to the second master base station Message;
  • the first preset information includes: a first identity identifier of all flows configured for the first primary base station and a data forwarding address corresponding to the first identity identifier, and a new A second identity identifier of all flows from the base station and the data forwarding address corresponding to the second identity identifier;
  • the data forwarding address corresponding to the first identity identifier are both the first tunnel address and the first tunnel address
  • the target base station decides to add an SN node and decides to transfer
  • the SDAP layer of the partial flow is configured in the MN, and the configuration of the partial flow is in the SN scenario, which can support direct data forwarding to the target SN; it is a good solution in the related technology.
  • the problem of direct data forwarding to the target SN cannot be achieved.
  • the data forwarding address is a PDU session-level data forwarding address for a preset PDU session.
  • the data forwarding device further includes: a first receiving module, configured to receive the second primary base station and / or the second primary base station after sending a handover request response message carrying first preset information to the second primary base station Data directly forwarded from the base station.
  • a first receiving module configured to receive the second primary base station and / or the second primary base station after sending a handover request response message carrying first preset information to the second primary base station Data directly forwarded from the base station.
  • implementation embodiments of the foregoing data forwarding method on the first primary base station side are all applicable to the embodiments of the data forwarding device, and can also achieve the same technical effect.
  • Some embodiments of the present disclosure also provide a data forwarding device, which is applied to the second primary base station, as shown in FIG. 14, including:
  • the second receiving module 141 is configured to receive a handover request response message carrying first preset information sent by the first master base station; wherein, the first preset information includes: all flows configured to the first master base station The first identity and the data forwarding address corresponding to the first identity, and the second identity and the data forwarding address corresponding to the second identity for all flows allocated to the newly added first slave base station ;
  • the second processing module 142 is configured to perform according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity Data forwarding.
  • the data forwarding apparatus receives the handover request response message carrying the first preset information sent by the first master base station; wherein, the first preset information includes: configured for the first master The first identity of all flows of the base station and the data forwarding address corresponding to the first identity, and the second identity of all flows configured for the newly added first slave base station and the second identity Corresponding data forwarding address; forwarding data according to the first identity, the data forwarding address corresponding to the first identity, the second identity, and the data forwarding address corresponding to the second identity It can support the realization that during the handover process, the target base station can provide two tunnel addresses for a PDU session.
  • the target base station decides to add an SN node and decides to configure the SDAP layer of part of the flow under a PDU session in the MN.
  • Part of the flow configuration can support direct data forwarding to the target SN in the SN scenario; a good solution to related technologies MN decides to target a portion of the flow of SDAP PDU session layer disposed MN, additional flow portion disposed at SN scenario, the problem can not be achieved to the target SN direct data forwarding.
  • the second processing module includes: a first acquisition sub-module for acquiring a first identity that matches the flow identity of the service data adaptation protocol SDAP layer at the second primary base station; the first A processing sub-module for forwarding the flow corresponding to the acquired first identity according to the data forwarding address corresponding to the acquired first identity; and / or a second acquisition sub-module for acquiring the SDAP A second identity that matches the identity of the flow in the second primary base station; a second processing sub-module is used to compare the acquired second identity with the data forwarding address corresponding to the acquired second identity The flow corresponding to the identity is forwarded.
  • the second processing module includes: a third processing submodule, configured to use the first identity, the data forwarding address corresponding to the first identity, the second identity, and the The data forwarding address corresponding to the second identity identifier, forwarding the data to the first master base station and / or the first slave base station.
  • a third processing submodule configured to use the first identity, the data forwarding address corresponding to the first identity, the second identity, and the The data forwarding address corresponding to the second identity identifier, forwarding the data to the first master base station and / or the first slave base station.
  • the data forwarding device further includes: a first sending module, configured to use the first identity identifier, the data forwarding address corresponding to the first identity identifier, the second identity identifier, and the The data forwarding address corresponding to the second identity, before data forwarding, according to the first identity, the data forwarding address corresponding to the first identity, the second identity and the second identity Corresponding to the data forwarding address, sending to the second slave base station a slave base station release request carrying second preset information; wherein the second preset information includes: the first identity and / or the second identity
  • the service data adaptation protocol SDAP layer of flow in the flow of the second slave base station has an identity identifier and a data forwarding address corresponding to the identity identifier; the data forwarding address corresponding to the first identity identifier is the first Tunnel address, the first tunnel address is used to forward data to the first primary base station; the data forwarding addresses corresponding to the second identity are all second tunnels Address, the second tunnel address is used to forward data to the first slave base station.
  • the first sending module includes: a third obtaining submodule, configured to obtain the flow of the SDAP layer in the flow of the second slave base station in the flow corresponding to the first identity and / or the second identity An identity identifier and a data forwarding address corresponding to the identity identifier; a first sending submodule, configured to send a second pre-carrying second pre-base station based on the identity identifier and the data forwarding address corresponding to the identity identifier Suppose that the request to release information from the base station.
  • the above-mentioned implementation embodiments of the data forwarding method on the second primary base station side are all applicable to the embodiments of the data forwarding device, and can also achieve the same technical effect.
  • Some embodiments of the present disclosure also provide a data forwarding device, which is applied to a second slave base station, as shown in FIG. 15, including:
  • the third receiving module 151 is configured to receive a slave base station release request that carries second preset information sent by the second master base station; wherein the second preset information includes: a first identity identifier and / or a second identity identifier The ID of the service data adaptation protocol SDAP layer in the corresponding flow in the flow of the second slave base station and the data forwarding address corresponding to the ID;
  • the third processing module 152 is configured to forward data according to the identity identifier and the data forwarding address;
  • the first identity identifier is an identity identifier of flow configured for the first master base station
  • the second identity identifier is an identity identifier of flow configured for the newly added first slave base station
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward the first slave The base station forwards the data.
  • the data forwarding device receives a slave base station release request carrying second preset information sent by a second master base station; wherein the second preset information includes: a first identity identifier and / or Or the service ID of the service data adaptation protocol SDAP layer in the flow corresponding to the second ID, the flow ID of the second slave base station, and the data forwarding address corresponding to the ID; based on the ID and the data forwarding address For data forwarding; wherein, the first identity identifier is an identity identifier of flow configured for the first master base station, and the second identity identifier is an identity identifier of flow configured for the newly added first slave base station;
  • the data forwarding address includes a first tunnel address and / or a second tunnel address, the first tunnel address is used to forward data to the first master base station, and the second tunnel address is used to forward to the first slave base station Data; can support the realization that during the handover process, the target base station can provide two tunnel addresses for a PDU session, so that the target base station
  • the third processing module includes: a fourth processing submodule, configured to forward data to the first master base station and / or the first slave base station according to the identity identifier and the data forwarding address.
  • the above-mentioned implementation embodiments of the second secondary base station side data forwarding method are all applicable to the embodiments of the data forwarding device, and can also achieve the same technical effect.
  • Some embodiments of the present disclosure also provide a data forwarding device, which is applied to the first slave base station, as shown in FIG. 16, including:
  • the fourth receiving module 161 is configured to receive data directly forwarded by the second master base station and / or the second slave base station.
  • the data forwarding device can receive data directly forwarded by the second master base station and / or the second slave base station; it can support the realization that during the handover process, the target base station can provide two tunnel addresses for one PDU session In this way, the target base station decides to add an SN node, and decides to configure part of the SDAP layer of the flow under a PDU session in the MN, and part of the flow configuration in the SN scenario can support direct data forwarding to the target SN; It is a good solution to the problem that in the related technology, the target MN decides to configure part of the SDAP layer of the flow in a PDU session in the MN, and the other part of the flow is configured in the SN scenario, which cannot achieve the direct data forwarding to the target SN.
  • the module / submodule may be implemented in software so as to be executed by various types of processors.
  • an identified executable code module may include one or more physical or logical blocks of computer instructions, which may be constructed as objects, procedures, or functions, for example. Nevertheless, the executable code of the identified module need not be physically located together, but may include different instructions stored in different bits, and when these instructions are logically combined together, it constitutes a module and implements the provisions of the module purpose.
  • the executable code module may be a single instruction or many instructions, and may even be distributed on multiple different code segments, among different programs, and across multiple memory devices.
  • operational data can be identified within the module, and can be implemented in any suitable form and organized within any suitable type of data structure. The operation data may be collected as a single data set, or may be distributed in different locations (including on different storage devices), and may exist at least partially as electronic signals only on the system or network.
  • the hardware circuits include conventional very large scale integration (VLSI) circuits or gate arrays and semiconductor or other discrete components in related technologies such as logic chips and transistors.
  • VLSI very large scale integration
  • Modules can also be implemented with programmable hardware devices, such as field programmable gate arrays, programmable array logic, programmable logic devices, and so on.

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Abstract

本公开提供了一种数据转发方法、装置、主基站及从基站，其中，数据转发方法，包括：接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设PDU session的部分数量的flow的SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向第二主基站发送携带第一预设信息的切换请求应答消息；其中，第一预设信息包括：配置给第一主基站的所有flow的第一身份标识和与第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与第二身份标识对应的数据转发地址。

Description

数据转发方法、装置、主基站及从基站
相关申请的交叉引用
本申请主张在2018年11月2日在中国提交的中国专利申请号No.201811303669.2的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，特别是指一种数据转发方法、装置、主基站及从基站。
背景技术
在LTE(长期演进)系统中，E-UTRAN(演进型全球陆地无线接入网)由多个eNodeB(4G基站)组成，eNodeB与EPC(4G分组核心网)之间通过S1接口连接，eNodeB之间通过X2接口连接，为了支持更高的数据吞吐量，UE(终端)可以通过两个eNodeB实现双连接。在5G系统中，同样的，和LTE系统的双连接类似，也支持eNodeB和gNB(5G基站)的紧耦合互操作(tight interworking)以及gNB和gNB的双连接。目前的规范支持切换过程中从双连接切换到双连接以及从单连接切换到双连接。但是，从双连接或单连切换到双连接过程中如何支持一个PDU SESSION(协议数据单元会话)下不同flow(流)分别到MN(主基站)节点和SN(从基站)节点的data forwarding(数据前传)，目前还没有方法解决该问题。
其中，关于对RAN(无线接入网)侧架构，eNodeB和gNB的tight interworking的场景下，主要有如下两种情况，其中第二种场景也包含了NR-NR DC(5G基站双连接)。
A)LTE是主基站，5G节点为辅基站的场景，通过LTE基站连接到核心网(EPC)，如图1所示(图中MME是指移动性管理实体，S1-MME是指4G基站与EPC之间的控制面接口，X2是指eNB连接到EPC时，eNB和gNB之间的接口，LTE MeNB是指4G主基站)。
B)5G节点和LTE基站都连接到5G的核心网(5GC)，如图2所示，eNodeB 和gNB tight interworking以及NR-NR DC的示意架构(连接到5GC)。图中NG是指gNB和接入和移动性管理功能实体AMF之间的接口，Xn是指eNB和gNB连接到5GC时，eNB和gNB之间的接口，NR gNB是指新空口5G基站，eNB是指4G基站。
在eNB和gNB连接到5G-C(5G核心网)的场景下，在NG-U(NG接口用户面)上建立以PDU session为粒度的用户面连接(或者称为用户面隧道)，一个UE可以同时建立多个NG-U上的PDU Session为粒度的用户面连接(或者称为用户面隧道)。每个PDU session下有多个flow，在单连接的情况下，一个PDU session对应一个tunnel(隧道)；在双连接场景下，一个PDU session下的多个flow可能分别配置在MN和SN。
相关技术中，切换过程中增加双连接的流程中，目标基站在收到源基站的切换请求消息后，根据切换请求消息中携带的承载信息决定是否需要建立双连接。如果需要建立双连接而且有合适的SCG(Secondary cell group辅小区组)小区，目标MN会向目标SN发起SN addition(SN增加)过程。收到SN的响应后，目标MN才向源基站发送切换响应消息。
在目前的切换响应消息中，目标MN会提供给源MN一个PDU SESSION level(协议数据单元会话级别)的data forwarding的地址。如果目标MN决定将一个PDU session中的部分flow的SDAP(服务数据适配协议)层配置在MN侧，另外部分flow的SDAP层配置在SN侧，相应的flow的数据需要分别转发到目标MN节点和目标SN节点。但是，目前的规范不支持该场景。
具体的，在切换过程中，如果目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，目前的规范不能支持到目标SN的直接的数据转发，影响切换过程中的性能，导致用户体验较差。
发明内容
本公开提供一种数据转发方法、装置、主基站及从基站，解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的 问题。
为了解决上述技术问题，本公开提供一种数据转发方法，应用于第一主基站，包括：
接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；
其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
可选的，在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，还包括：
接收第二主基站和/或第二从基站直接转发的数据。
本公开还提供了一种数据转发方法，应用于第二主基站，包括：
接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发。
可选的，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发，包括：
获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；
根据获取到的第一身份标识所对应的数据转发地址，对获取到的第一身份标识所对应的flow进行转发；和/或
获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；
根据获取到的第二身份标识所对应的数据转发地址，对获取到的第二身份标识所对应的flow进行转发。
可选的，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发，包括：
根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
可选的，在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，还包括：
根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求；
其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二 隧道地址用于向所述第一从基站转发数据。
可选的，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求，包括：
获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；
根据所述身份标识和与所述身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求。
本公开还提供了一种数据转发方法，应用于第二从基站，包括：
接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
根据所述身份标识和数据转发地址，进行数据转发；
其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述根据所述身份标识和数据转发地址，进行数据转发，包括：
根据所述身份标识和数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
本公开还提供了一种数据转发方法，应用于第一从基站，包括：
接收第二主基站和/或第二从基站直接转发的数据。
本公开还提供了一种第一主基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流 flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则通过所述收发机向所述第二主基站发送携带第一预设信息的切换请求应答消息；
其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
可选的，所述处理器还用于：
在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，通过所述收发机接收第二主基站和/或第二从基站直接转发的数据。
本公开还提供了一种第二主基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发。
可选的，所述处理器具体用于：
获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识 相匹配的第一身份标识；
根据获取到的第一身份标识所对应的数据转发地址，利用所述收发机对获取到的第一身份标识所对应的flow进行转发；和/或
获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；
根据获取到的第二身份标识所对应的数据转发地址，利用所述收发机对获取到的第二身份标识所对应的flow进行转发。
可选的，所述处理器具体用于：
根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，利用所述收发机将数据转发给所述第一主基站和/或第一从基站。
可选的，所述处理器还用于：
在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，通过所述收发机向第二从基站发送携带有第二预设信息的从基站释放请求；
其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述处理器具体用于：
获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；
根据所述身份标识和与所述身份标识对应的数据转发地址，通过所述收发机向第二从基站发送携带有第二预设信息的从基站释放请求。
本公开还提供了一种第二从基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
根据所述身份标识和数据转发地址，利用所述收发机进行数据转发；
其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述处理器具体用于：
根据所述身份标识和数据转发地址，利用所述收发机将数据转发给所述第一主基站和/或第一从基站。
本公开还提供了一种第一从基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收第二主基站和/或第二从基站直接转发的数据。
本公开例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述的数据转发方法的步骤。
本公开还提供了一种数据转发装置，应用于第一主基站，包括：
第一处理模块，用于接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；
其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第 一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
可选的，还包括：
第一接收模块，用于在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，接收第二主基站和/或第二从基站直接转发的数据。
本公开还提供了一种数据转发装置，应用于第二主基站，包括：
第二接收模块，用于接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
第二处理模块，用于根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发。
可选的，所述第二处理模块，包括：
第一获取子模块，用于获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；
第一处理子模块，用于根据获取到的第一身份标识所对应的数据转发地址，对获取到的第一身份标识所对应的flow进行转发；和/或
第二获取子模块，用于获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；
第二处理子模块，用于根据获取到的第二身份标识所对应的数据转发地 址，对获取到的第二身份标识所对应的flow进行转发。
可选的，所述第二处理模块，包括：
第三处理子模块，用于根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
可选的，还包括：
第一发送模块，用于在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求；
其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述第一发送模块，包括：
第三获取子模块，用于获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；
第一发送子模块，用于根据所述身份标识和与所述身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求。
本公开还提供了一种数据转发装置，应用于第二从基站，包括：
第三接收模块，用于接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
第三处理模块，用于根据所述身份标识和数据转发地址，进行数据转发；
其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
可选的，所述第三处理模块，包括：
第四处理子模块，用于根据所述身份标识和数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
本公开还提供了一种数据转发装置，应用于第一从基站，包括：
第四接收模块，用于接收第二主基站和/或第二从基站直接转发的数据。
本公开的上述技术方案的有益效果如下：
上述方案中，所述数据转发方法通过接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据；能够实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
附图说明
图1为相关技术中的eNodeB和gNB tight interworking架构示意图；
图2为相关技术中的eNodeB和gNB tight interworking以及NR-NR DC架构示意图；
图3为本公开一些实施例的数据转发方法流程示意图一；
图4为本公开一些实施例的数据转发方法流程示意图二；
图5为本公开一些实施例的数据转发方法流程示意图三；
图6为本公开一些实施例的数据转发方法流程示意图四；
图7为本公开一些实施例的数据转发方法具体应用流程示意图一；
图8为本公开一些实施例的数据转发方法具体应用流程示意图二；
图9为本公开一些实施例的第一主基站结构示意图；
图10为本公开一些实施例的第二主基站结构示意图；
图11为本公开一些实施例的第二从基站结构示意图；
图12为本公开一些实施例的第一从基站结构示意图；
图13为本公开一些实施例的数据转发装置结构示意图一；
图14为本公开一些实施例的数据转发装置结构示意图二；
图15为本公开一些实施例的数据转发装置结构示意图三；
图16为本公开一些实施例的数据转发装置结构示意图四。
具体实施方式
为使本公开要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
本公开针对相关的技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题，提供一种数据转发方法，应用于第一主基站(具体可以为双连接场景中的目标主基站MN，但并不以此为限)，如图3所示，包括：
步骤31：接收到第二主基站发送的切换请求消息后，若确定新增从基站 节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；
其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
本公开一些实施例提供的所述数据转发方法通过接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据；能够实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体的，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
进一步的，在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，还包括：接收第二主基站和/或第二从基站直接转发的数据。
本公开一些实施例还提供了一种数据转发方法，应用于第二主基站(具体可以为单连接场景中的源基站或双连接场景中的源主基站MN，但并不以此为限)，如图4所示，包括：
步骤41：接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
步骤42：根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发。
本公开一些实施例提供的所述数据转发方法通过接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
其中，所述根据所述第一身份标识、与所述第一身份标识对应的数据转 发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发，包括：获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；根据获取到的第一身份标识所对应的数据转发地址，对获取到的第一身份标识所对应的flow进行转发；和/或获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；根据获取到的第二身份标识所对应的数据转发地址，对获取到的第二身份标识所对应的flow进行转发。
具体的，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发，包括：根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
进一步的，第二主基站为源MN时，在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，还包括：根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
具体的，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求，包括：获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；根据所述身份标识和与所述身份标识对应的数据转发地址，向第二从基站发送携带有第二预 设信息的从基站释放请求。
本公开一些实施例还提供了一种数据转发方法，应用于第二从基站(具体可以为双连接场景中的源从基站SN，但并不以此为限)，如图5所示，包括：
步骤51：接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
步骤52：根据所述身份标识和数据转发地址，进行数据转发；
其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
本公开一些实施例提供的所述数据转发方法通过接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；根据所述身份标识和数据转发地址，进行数据转发；其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体的，所述根据所述身份标识和数据转发地址，进行数据转发，包括：根据所述身份标识和数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
本公开一些实施例还提供了一种数据转发方法，应用于第一从基站(具体可以为双连接场景中的目标从基站SN，但并不以此为限)，如图6所示，包括：
步骤61：接收第二主基站和/或第二从基站直接转发的数据。
本公开一些实施例提供的所述数据转发方法通过接收第二主基站和/或第二从基站直接转发的数据；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
下面结合第一主基站、第二主基站、第二从基站和第一从基站等多侧对本公开一些实施例提供的所述数据转发方法进行进一步说明。
针对上述技术问题，本公开一些实施例提供一种数据转发方法，主要是：
针对源侧是单连接场景、目标侧是双连接场景的情况，如果目标主基站在收到源基站的切换请求后，决定增加一个新的SN节点，并且决定把某个PDU session中的部分flow的SDAP层配置在MN节点，另外的部分flow的SDAP层配置在SN节点(可根据目标MN和双连接场景中的目标SN的负载进行分配)；这种情况下，目标MN给源基站发送两个PDU session level的data forwarding的地址(分别是目标MN分配的tunnel和目标SN分配的tunnel)，每个tunnel对应一个flow的列表，表示该列表下的所有flow的数据需要转发到该地址。源基站根据该信息将相应的flow的(需要转发的)数据转发到目标MN和/或目标SN(即源基站可直接将数据转发给目标MN和/或目标SN)。
针对源侧以及目标侧均是双连接场景的情况，如果目标主基站在接收到源主基站的切换请求后，决定增加一个新的SN节点，并且决定把某个PDU  session中的部分flow的SDAP层配置在MN节点，另外的部分flow的SDAP层配置在SN节点(可根据目标MN和目标SN的负载进行分配)；这种情况下，目标MN给源MN发送两个PDU session level的data forwarding的地址(分别是目标MN分配的tunnel和目标SN分配的tunnel)，每个tunnel对应一个flow的列表，表示该列表下的所有flow的数据需要转发到该地址。源MN和/或源SN根据该信息将相应的flow的(需要转发的)数据转发到目标MN和/或目标SN(即源MN可将数据直接转发给目标MN和/或目标SN，和/或，源SN可将数据直接转发给目标MN和/或目标SN)。
下面对本公开一些实施例提供的方案进行举例说明，以源侧为双连接场景为例(具体第一主基站以双连接场景中的目标主基站MN为例，第二主基站以双连接场景中的源主基站MN为例，第二从基站以双连接场景中的源从基站SN为例，第一从基站以双连接场景中的目标从基站SN为例)。
举例一，假设终端UE处于双连接，UE的服务基站(源主基站)根据测量上报发起Xn切换过程，目标主基站根据自身的负载情况以及UE的测量上报决定增加一个新的SgNB。对于PDU session 1(包含了四个flow，)，目标MN决定将flow 1和2配置在MN，flow 3和4配置在SN。
如图7所示，本公开一些实施例提供的方案具体可包括：
步骤71：源主基站(source MN/源MN)向目标主基站(target MN/目标MN)发送切换请求Handover Request消息。
步骤72：目标MN向目标从基站(target SN/目标SN)发送从基站增加请求SgNB Addition Request。
具体可为，目标MN根据自身LOAD(负载)等情况决定增加一个新的SN节点，其中，PDU session1的flow 1和2是配置在MN节点，flow3和4是配置在SN节点。
关于flow 1、2、3和4的SDAP层可以在源MN或源SN，在此不作限定。
步骤73：目标SN向目标MN反馈从基站增加请求应答SgNB Addition Request Ack。
其中，目标SN可提供PDU session 1的data forwarding的地址(该地址是向目标SN转发数据的地址，具体可为步骤74中的一个tunnel)。
步骤74：目标MN向源MN反馈切换请求应答Handover Request Acknowledge(针对PDU session 1配置了两个PDU session level的tunnel)。
具体可为，目标MN在给源MN的切换请求ACK消息中，针对PDU session1提供两个PDU session level的data forwarding的tunnel，并且，也提供每个tunnel对应的flow list(具体可分配空闲的tunnel ID。切换请求ACK消息中记录的可为flow ID，一个tunnel对应哪几个flow)。
步骤75a：源MN向源从基站(source SN/源SN)发送从基站释放请求SgNB Release Request。
具体可为，源MN求释放源SN，并提供data forwarding的地址(具体可为分配给源SN的tunnel及对应的flow list)。
更具体的，也就是如果源侧也配置了双连接，源MN判断每个flow是在源SN还是源MN，对于SDAP层在源SN的flow，把该flow对应的data forwarding的地址转发给源SN。
步骤75b：源SN向源MN反馈从基站释放请求应答SgNB Release Request Acknowledge。
步骤76：源MN向UE发送无线资源控制连接重配RRC Connection Reconfiguration消息。
步骤77：UE与目标MN之间进入随机接入过程Random Access Procedure。
步骤78：UE向目标MN发送无线资源控制连接重配完成RRC Connection Reconfiguration Complete消息。
针对步骤77和78，也就是，UE向目标MN发起随机接入过程，UE与目标MN同步，并回应RRC Connection Reconfiguration Complete消息。
步骤79：UE与目标SN之间进入随机接入过程Random Access Procedure。
也就是，UE向目标SN同步。
步骤710：目标MN向目标SN发送从基站重配完成SgNB Reconfiguration Complete消息。
具体的，如果无线承载配置成功，目标MN通过SgNB Reconfiguration Complete消息通知目标SN。
步骤711a：源SN向源MN发送辅节点数据量报告Secondary RAT Data  Volume Report。
步骤711b：源MN向移动性管理实体MME发送辅节点报告Secondary RAT Report。
步骤712：源MN向目标MN发送序列号状态传递SN Status Transfer消息。
此处的SN代表sequence number。
步骤713：源MN进行数据转发，和/或源SN进行数据转发；图中的S-GW表示服务网关，源MN向目标MN转发数据只是示意，也可向目标SN转发数据，源SN向目标SN转发数据只是示意，也可向目标MN转发数据，在此不作限定。
也就是，对于步骤712和713，来自源MN的数据前传开始，来自源SN的数据前传也开始：源MN可以直接将数据前传到目标MN和/或目标SN，源SN也可以直接将数据前传到目标MN和/或目标SN。
步骤714：目标MN向MME发送路径转换请求Path Switch Request。
步骤715：S-GW与MME之间交互进行承载修改Bearer Modification。
步骤716a：S-GW向目标MN发送新路径(分离/主小区组承载)New Path(split/MCG bearer)消息。
步骤716b：S-GW向目标SN发送新路径(分离/从小区组承载)New Path(split/SCG bearer)消息。
步骤717：MME向目标MN反馈路径转换请求应答Path Switch Request Acknowledge。
对于步骤714至717，也就是目标MN发起S1路径更新过程，此处S1是指S1接口，S1接口是LTE eNodeB(基站)与EPC(分组核心网)之间的接口。
步骤718：目标MN向源MN发送终端上下文释放UE Context Release消息。
也就是，目标MN向源MN发起UE Context Release过程。
步骤719：源MN向源SN发送终端上下文释放UE Context Release消息。
具体的，源SN一旦接收到UE CONTEXT RELEASE消息后，会释放空口和控制面的资源，数据前传可以继续执行。
举例二，假设UE处于双连接，UE的服务基站根据测量上报发起NG切换过程，目标基站根据自身的负载情况以及UE的测量上报决定增加一个新的SgNB。对于PDU session 1(包含了四个flow)，MN决定将flow 1和2配置在MN，flow 3和4配置在SN。
如图8所示，本公开一些实施例提供的方案具体可包括：
步骤81：源主基站(source MN/源MN)向移动性管理实体MME发送切换申请Handover Required消息。
步骤82：MME向目标主基站(target MN/目标MN)发送切换请求Handover Request消息。
步骤83：目标MN向目标从基站(target SN/目标SN)发送从基站增加请求SgNB Addition Request。
具体可为，目标MN根据自身LOAD等情况决定增加一个新的SN节点，其中，PDU session1的flow 1和2是配置在MN节点，flow3和4是配置在SN节点。
关于flow 1、2、3和4的SDAP层可以在源MN或源SN，在此不作限定。
步骤84：目标SN向目标MN反馈从基站增加请求应答SgNB Addition Request Ack。
其中，目标SN可提供PDU session 1的data forwarding的地址(该地址是向目标SN转发数据的地址，具体可为步骤85中的一个tunnel)。
步骤85：目标MN向MME反馈切换请求应答Handover Request Acknowledge(针对PDU session 1配置了两个PDU session level的tunnel)。
具体可为，目标MN在MME的切换请求ACK消息中，针对PDU session1提供了两个PDU session level的data forwarding的tunnel，并且，也提供每个tunnel对应的flow list(具体可分配空闲的tunnel ID。切换请求ACK消息中记录的可为flow ID，一个tunnel对应哪几个flow)。
步骤86：MME向源MN发送切换命令Handover Command(针对PDU session1配置了两个PDU session level的tunnel)。
具体可为，MME在给源MN的Handover Command中，针对PDU session1提供了两个PDU session level的data forwarding的tunnel，并且，也提 供每个tunnel对应的flow list(具体Handover Command消息中记录的可为flow ID，一个tunnel对应哪几个flow)。
步骤87a：源MN向源从基站(source SN/源SN)发送从基站释放请求SgNB Release Request。
具体可为，源MN请求释放源SN，并提供data forwarding的地址(具体可为分配给源SN的tunnel及对应的flow list)。
更具体的，也就是如果源侧也配置了双连接，源MN判断每个flow是在源SN还是源MN，对于SDAP层在源SN的flow，把该flow对应的data forwarding的地址转发给源SN。
步骤87b：源SN向源MN反馈从基站释放请求应答SgNB Release Request Acknowledge。
步骤88：源MN向UE发送无线资源控制连接重配RRC Connection Reconfiguration消息。
步骤89：UE与目标MN之间进入随机接入过程Random Access Procedure。
步骤810：UE向目标MN发送无线资源控制连接重配完成RRC Connection Reconfiguration Complete消息。
针对步骤89和810，也就是，UE向目标MN发起随机接入过程，UE与目标MN同步，并回应RRC Connection Reconfiguration Complete消息。
步骤811：UE与目标SN之间进入随机接入过程Random Access Procedure。
也就是，UE向目标SN同步。
步骤812：目标MN向目标SN发送从基站重配完成SgNB Reconfiguration Complete消息。
具体的，如果无线承载配置成功，目标MN通过SgNB Reconfiguration Complete消息通知目标SN。
步骤813a：源SN向源MN发送辅节点数据量报告Secondary RAT Data Volume Report。
步骤813b：源MN向MME发送辅节点报告Secondary RAT Report。
步骤814：源MN向MME发送序列号状态传递SN Status Transfer消息。
此处的SN代表sequence number。
步骤815：源MN进行数据转发，和/或源SN进行数据转发；图中的S-GW表示服务网关，源MN向目标MN转发数据只是示意，也可向目标SN转发数据，源SN向目标SN转发数据只是示意，也可向目标MN转发数据，在此不作限定。
也就是，对于步骤814和815，来自源MN的数据前传开始，来自源SN的数据前传也开始：源MN可以直接将数据前传到目标MN和/或目标SN，源SN也可以直接将数据前传到目标MN和/或目标SN。
步骤816：目标MN向MME发送切换通知Handover Notify。
步骤817：S-GW与MME之间交互进行承载修改Bearer Modification。
步骤818a：S-GW向目标MN发送新路径(分离/主小区组承载)New Path(split/MCG bearer)消息。
步骤818b：S-GW向目标SN发送新路径(分离/从小区组承载)New Path(split/SCG bearer)消息。
对于步骤816-818，也就是目标MN发起S1路径更新过程。
步骤819：目标MN向源MN发送终端上下文释放UE Context Release消息。
也就是，目标MN向源MN发起UE Context Release过程。
步骤820：源MN向源SN发送终端上下文释放UE Context Release消息。
具体的，源SN一旦接收到UE CONTEXT RELEASE消息后，会释放空口和控制面的资源，数据前传可以继续执行。
由上可知，本公开一些实施例提供的方案中涉及以下内容：
(1)目标MN在给单连接场景中的源基站(或双连接场景中的源MN)发送的切换响应消息中针对一个PDU session携带了两个PDU SESSION LEVEL的地址，同时携带每个地址下对应的flow ID；
(2)如果源侧也配置了双连接，源MN会判断每个flow是在源SN还是源MN，对于SDAP层在源SN的flow，把该flow对应的data forwarding的地址转发给SN。
综上，本公开一些实施例提供的方案给出了在切换过程中，目标MN可以针对一个PDU session提供两个PDU session level的tunnel地址，这样，在目标MN决定增加一个SN节点，并且决定将一个PDU session下的部分flow 的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding。
本公开一些实施例还提供了一种第一主基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则通过所述收发机向所述第二主基站发送携带第一预设信息的切换请求应答消息；
其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
本公开一些实施例提供的所述第一主基站通过所述收发机接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则通过所述收发机向所述第二主基站发送携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从 基站转发数据；能够实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体可如图9所示，本公开一些实施例的第一主基站，包括：
处理器91；以及通过总线接口92与所述处理器91相连接的存储器93，所述存储器93用于存储所述处理器91在执行操作时所使用的程序和数据，当处理器91调用并执行所述存储器93中所存储的程序和数据时，执行下列过程：
通过所述收发机94接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则通过所述收发机94向所述第二主基站发送携带第一预设信息的切换请求应答消息；
其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
其中，收发机94与总线接口92连接，用于在处理器91的控制下接收和发送数据。
需要说明的是，在图9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91代表的一个或多个处理器和存储器93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94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91负责管理总线架构和通常的处理，存储器93可以存储处理器91在执行操作时所使用的数据。
本领域技术人员可以理解，实现上述实施例的全部或者部分步骤可以通过硬件来完成，也可以通过计算机程序来指示相关的硬件来完成，所述计算机程序包括执行上述方法的部分或者全部步骤的指令；且该计算机程序可以存储于一可读存储介质中，存储介质可以是任何形式的存储介质。
具体的，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
进一步的，所述处理器还用于：在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，通过所述收发机接收第二主基站和/或第二从基站直接转发的数据。
其中，上述第一主基站侧的数据转发方法的所述实现实施例均适用于该第一主基站的实施例中，也能达到相同的技术效果。
本公开一些实施例还提供了一种第二主基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，通过所述收发机进行数据转发。
本公开一些实施例提供的所述第二主基站通过所述收发机接收第一主基 站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，通过所述收发机进行数据转发；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体可如图10所示，本公开一些实施例的第二主基站，包括：
处理器101；以及通过总线接口102与所述处理器101相连接的存储器103，所述存储器103用于存储所述处理器101在执行操作时所使用的程序和数据，当处理器101调用并执行所述存储器103中所存储的程序和数据时，执行下列过程：
通过所述收发机104接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，通过所述收发机104进行数据转发。
其中，收发机104与总线接口102连接，用于在处理器101的控制下接收和发送数据。
需要说明的是，在图10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101代表的一个或多个处理器和存储器103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104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101负责管理总线架构和通常的处理，存储器103可以存储处理器101在执行操作时所使用的数据。
本领域技术人员可以理解，实现上述实施例的全部或者部分步骤可以通过硬件来完成，也可以通过计算机程序来指示相关的硬件来完成，所述计算机程序包括执行上述方法的部分或者全部步骤的指令；且该计算机程序可以存储于一可读存储介质中，存储介质可以是任何形式的存储介质。
其中，所述处理器具体用于：获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；根据获取到的第一身份标识所对应的数据转发地址，利用所述收发机对获取到的第一身份标识所对应的flow进行转发；和/或获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；根据获取到的第二身份标识所对应的数据转发地址，利用所述收发机对获取到的第二身份标识所对应的flow进行转发。
具体的，所述处理器具体用于：根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，利用所述收发机将数据转发给所述第一主基站和/或第一从基站。
进一步的，所述处理器还用于：在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，通过所述收发机向第二从基站发送携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；与所述第一 身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
具体的，所述处理器具体用于：获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；根据所述身份标识和与所述身份标识对应的数据转发地址，通过所述收发机向第二从基站发送携带有第二预设信息的从基站释放请求。
其中，上述第二主基站侧的数据转发方法的所述实现实施例均适用于该第二主基站的实施例中，也能达到相同的技术效果。
本公开一些实施例还提供了一种第二从基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
根据所述身份标识和数据转发地址，利用所述收发机进行数据转发；
其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
本公开一些实施例提供的所述第二从基站通过所述收发机接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；根据所述身份标识和数据转发地址，利用所述收发机进行数据转发；其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述 第二身份标识为配置给新增的第一从基站的flow的身份标识；所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体可如图11所示，本公开一些实施例的第二从基站，包括：
处理器111；以及通过总线接口112与所述处理器111相连接的存储器113，所述存储器113用于存储所述处理器111在执行操作时所使用的程序和数据，当处理器111调用并执行所述存储器113中所存储的程序和数据时，执行下列过程：
通过所述收发机114接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
根据所述身份标识和数据转发地址，利用所述收发机114进行数据转发；
其中，所述第一身份标识为配置给第一主基站的流flow的身份标识，所述第二身份标识为配置给新增的第一从基站的流flow的身份标识；
所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
其中，收发机114与总线接口112连接，用于在处理器111的控制下接收和发送数据。
需要说明的是，在图11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111代表的一个或多个处理器和存储器113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114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111负责管理总线架构和通常的处理，存储器113可以存储处理器111在执行操作时所使用的数据。
本领域技术人员可以理解，实现上述实施例的全部或者部分步骤可以通过硬件来完成，也可以通过计算机程序来指示相关的硬件来完成，所述计算机程序包括执行上述方法的部分或者全部步骤的指令；且该计算机程序可以存储于一可读存储介质中，存储介质可以是任何形式的存储介质。
具体的，所述处理器具体用于：根据所述身份标识和数据转发地址，利用所述收发机将数据转发给所述第一主基站和/或第一从基站。
其中，上述第二从基站侧的数据转发方法的所述实现实施例均适用于该第二从基站的实施例中，也能达到相同的技术效果。
本公开一些实施例还提供了一种第一从基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现以下步骤：
通过所述收发机接收第二主基站和/或第二从基站直接转发的数据。
本公开一些实施例提供的所述第一从基站通过所述收发机接收第二主基站和/或第二从基站直接转发的数据；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体可如图12所示，本公开一些实施例的第一从基站，包括：
处理器121；以及通过总线接口122与所述处理器121相连接的存储器123，所述存储器123用于存储所述处理器121在执行操作时所使用的程序和 数据，当处理器121调用并执行所述存储器123中所存储的程序和数据时，执行下列过程：
通过所述收发机124接收第二主基站和/或第二从基站直接转发的数据。
其中，收发机124与总线接口122连接，用于在处理器121的控制下接收和发送数据。
需要说明的是，在图12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121代表的一个或多个处理器和存储器123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124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121负责管理总线架构和通常的处理，存储器123可以存储处理器121在执行操作时所使用的数据。
本领域技术人员可以理解，实现上述实施例的全部或者部分步骤可以通过硬件来完成，也可以通过计算机程序来指示相关的硬件来完成，所述计算机程序包括执行上述方法的部分或者全部步骤的指令；且该计算机程序可以存储于一可读存储介质中，存储介质可以是任何形式的存储介质。
其中，上述第一从基站侧的数据转发方法的所述实现实施例均适用于该第一从基站的实施例中，也能达到相同的技术效果。
本公开一些实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述第一主基站侧的数据转发方法的步骤；或者
该程序被处理器执行时实现上述第二主基站侧的数据转发方法的步骤；或者
该程序被处理器执行时实现上述第二从基站侧的数据转发方法的步骤；或者
该程序被处理器执行时实现如上述第一从基站侧的数据转发方法的步骤。
其中，上述第一主基站侧、第二主基站侧、第二从基站侧和/或第一从基站侧的数据转发方法的所述实现实施例均适用于该计算机可读存储介质的实 施例中，也能达到对应相同的技术效果。
本公开一些实施例还提供了一种数据转发装置，应用于第一主基站，如图13所示，包括：
第一处理模块131，用于接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；
其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
本公开一些实施例提供的所述数据转发装置通过接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据；能够实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的 部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体的，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
进一步的，所述数据转发装置还包括：第一接收模块，用于在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，接收第二主基站和/或第二从基站直接转发的数据。
其中，上述第一主基站侧的数据转发方法的所述实现实施例均适用于该数据转发装置的实施例中，也能达到相同的技术效果。
本公开一些实施例还提供了一种数据转发装置，应用于第二主基站，如图14所示，包括：
第二接收模块141，用于接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
第二处理模块142，用于根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发。
本公开一些实施例提供的所述数据转发装置通过接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在 目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
其中，所述第二处理模块，包括：第一获取子模块，用于获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；第一处理子模块，用于根据获取到的第一身份标识所对应的数据转发地址，对获取到的第一身份标识所对应的flow进行转发；和/或第二获取子模块，用于获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；第二处理子模块，用于根据获取到的第二身份标识所对应的数据转发地址，对获取到的第二身份标识所对应的flow进行转发。
具体的，所述第二处理模块，包括：第三处理子模块，用于根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
进一步的，所述数据转发装置还包括：第一发送模块，用于在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
具体的，所述第一发送模块，包括：第三获取子模块，用于获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的 flow的身份标识以及与所述身份标识对应的数据转发地址；第一发送子模块，用于根据所述身份标识和与所述身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求。
其中，上述第二主基站侧的数据转发方法的所述实现实施例均适用于该数据转发装置的实施例中，也能达到相同的技术效果。
本公开一些实施例还提供了一种数据转发装置，应用于第二从基站，如图15所示，包括：
第三接收模块151，用于接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
第三处理模块152，用于根据所述身份标识和数据转发地址，进行数据转发；
其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
本公开一些实施例提供的所述数据转发装置通过接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；根据所述身份标识和数据转发地址，进行数据转发；其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的 SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
具体的，所述第三处理模块，包括：第四处理子模块，用于根据所述身份标识和数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
其中，上述第二从基站侧的数据转发方法的所述实现实施例均适用于该数据转发装置的实施例中，也能达到相同的技术效果。
本公开一些实施例还提供了一种数据转发装置，应用于第一从基站，如图16所示，包括：
第四接收模块161，用于接收第二主基站和/或第二从基站直接转发的数据。
本公开一些实施例提供的所述数据转发装置通过接收第二主基站和/或第二从基站直接转发的数据；能够支撑实现在切换过程中，目标基站可以针对一个PDU session提供两个tunnel地址，这样，在目标基站决定增加一个SN节点，并且决定将一个PDU session下的部分flow的SDAP层配置在MN，部分flow的配置在SN的场景下，可以支持到目标SN的直接的data forwarding；很好的解决相关技术中目标MN决定将一个PDU session中的部分flow的SDAP层配置在MN，另外的部分flow配置在SN的场景下，无法实现到目标SN的直接的数据转发的问题。
其中，上述第一从基站侧的数据转发方法的所述实现实施例均适用于该数据转发装置的实施例中，也能达到相同的技术效果。
需要说明的是，此说明书中所描述的许多功能部件都被称为模块/子模块，以便更加特别地强调其实现方式的独立性。
本公开一些实施例中，模块/子模块可以用软件实现，以便由各种类型的处理器执行。举例来说，一个标识的可执行代码模块可以包括计算机指令的一个或多个物理或者逻辑块，举例来说，其可以被构建为对象、过程或函数。尽管如此，所标识模块的可执行代码无需物理地位于一起，而是可以包括存储在不同位里上的不同的指令，当这些指令逻辑上结合在一起时，其构成模 块并且实现该模块的规定目的。
实际上，可执行代码模块可以是单条指令或者是许多条指令，并且甚至可以分布在多个不同的代码段上，分布在不同程序当中，以及跨越多个存储器设备分布。同样地，操作数据可以在模块内被识别，并且可以依照任何适当的形式实现并且被组织在任何适当类型的数据结构内。所述操作数据可以作为单个数据集被收集，或者可以分布在不同位置上(包括在不同存储设备上)，并且至少部分地可以仅作为电子信号存在于系统或网络上。
在模块可以利用软件实现时，考虑到相关技术中硬件工艺的水平，所以可以以软件实现的模块，在不考虑成本的情况下，本领域技术人员都可以搭建对应的硬件电路来实现对应的功能，所述硬件电路包括常规的超大规模集成(VLSI)电路或者门阵列以及诸如逻辑芯片、晶体管之类的相关技术中半导体或者是其它分立的元件。模块还可以用可编程硬件设备，诸如现场可编程门阵列、可编程阵列逻辑、可编程逻辑设备等实现。
以上所述的是本公开的一些实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述原理前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (33)

  1. 一种数据转发方法，应用于第一主基站，包括：
    接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；
    其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
    与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
    与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
  2. 根据权利要求1所述的数据转发方法，其中，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
  3. 根据权利要求1所述的数据转发方法，其中，在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，还包括：
    接收第二主基站和/或第二从基站直接转发的数据。
  4. 一种数据转发方法，应用于第二主基站，包括：
    接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
    根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发。
  5. 根据权利要求4所述的数据转发方法，其中，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发，包括：
    获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；
    根据获取到的第一身份标识所对应的数据转发地址，对获取到的第一身份标识所对应的flow进行转发；和/或
    获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；
    根据获取到的第二身份标识所对应的数据转发地址，对获取到的第二身份标识所对应的flow进行转发。
  6. 根据权利要求4或5所述的数据转发方法，其中，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发，包括：
    根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
  7. 根据权利要求4所述的数据转发方法，其中，在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，还包括：
    根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求；
    其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
    与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
    与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二 隧道地址用于向所述第一从基站转发数据。
  8. 根据权利要求7所述的数据转发方法，其中，所述根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求，包括：
    获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；
    根据所述身份标识和与所述身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求。
  9. 一种数据转发方法，应用于第二从基站，包括：
    接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
    根据所述身份标识和数据转发地址，进行数据转发；
    其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
    所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
  10. 根据权利要求9所述的数据转发方法，其中，所述根据所述身份标识和数据转发地址，进行数据转发，包括：
    根据所述身份标识和数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
  11. 一种数据转发方法，应用于第一从基站，包括：
    接收第二主基站和/或第二从基站直接转发的数据。
  12. 一种第一主基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；其中，所述处理器执行所述程序时实现以下步骤：
    通过所述收发机接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则通过所述收发机向所述第二主基站发送携带第一预设信息的切换请求应答消息；
    其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
    与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
    与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
  13. 根据权利要求12所述的第一主基站，其中，所述数据转发地址为针对预设PDU session的PDU session级别的数据转发地址。
  14. 根据权利要求12所述的第一主基站，其中，所述处理器还用于：
    在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，通过所述收发机接收第二主基站和/或第二从基站直接转发的数据。
  15. 一种第二主基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；其中，所述处理器执行所述程序时实现以下步骤：
    通过所述收发机接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
    根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，通过所述收发机进行数据转发。
  16. 根据权利要求15所述的第二主基站，其中，所述处理器具体用于：
    获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；
    根据获取到的第一身份标识所对应的数据转发地址，利用所述收发机对获取到的第一身份标识所对应的flow进行转发；和/或
    获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；
    根据获取到的第二身份标识所对应的数据转发地址，利用所述收发机对获取到的第二身份标识所对应的flow进行转发。
  17. 根据权利要求15或16所述的第二主基站，其中，所述处理器具体用于：
    根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，利用所述收发机将数据转发给所述第一主基站和/或第一从基站。
  18. 根据权利要求15所述的第二主基站，其中，所述处理器还用于：
    在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，通过所述收发机向第二从基站发送携带有第二预设信息的从基站释放请求；
    其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
    与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
    与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
  19. 根据权利要求18所述的第二主基站，其中，所述处理器具体用于：
    获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述 第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；
    根据所述身份标识和与所述身份标识对应的数据转发地址，通过所述收发机向第二从基站发送携带有第二预设信息的从基站释放请求。
  20. 一种第二从基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；其中，所述处理器执行所述程序时实现以下步骤：
    通过所述收发机接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
    根据所述身份标识和数据转发地址，利用所述收发机进行数据转发；
    其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
    所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
  21. 根据权利要求20所述的第二从基站，其中，所述处理器具体用于：
    根据所述身份标识和数据转发地址，利用所述收发机将数据转发给所述第一主基站和/或第一从基站。
  22. 一种第一从基站，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的计算机程序；其中，所述处理器执行所述程序时实现以下步骤：
    通过所述收发机接收第二主基站和/或第二从基站直接转发的数据。
  23. 一种计算机可读存储介质，其上存储有计算机程序，其中，该程序被处理器执行时实现如权利要求1至3任一项所述的数据转发方法的步骤；或者
    该程序被处理器执行时实现如权利要求4至8任一项所述的数据转发方法的步骤；或者
    该程序被处理器执行时实现如权利要求9至10任一项所述的数据转发方 法的步骤；或者
    该程序被处理器执行时实现如权利要求11所述的数据转发方法的步骤。
  24. 一种数据转发装置，应用于第一主基站，包括：
    第一处理模块，用于接收到第二主基站发送的切换请求消息后，若确定新增从基站节点，且确定将预设协议数据单元会话PDU session的部分数量的流flow的服务数据适配协议SDAP层配置在主基站节点，剩余数量的flow的SDAP层配置在新增的从基站节点，则向所述第二主基站发送携带第一预设信息的切换请求应答消息；
    其中，所述第一预设信息包括：配置给所述第一主基站的所有flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
    与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
    与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
  25. 根据权利要求24所述的数据转发装置，还包括：
    第一接收模块，用于在向所述第二主基站发送携带第一预设信息的切换请求应答消息之后，接收第二主基站和/或第二从基站直接转发的数据。
  26. 一种数据转发装置，应用于第二主基站，包括：
    第二接收模块，用于接收第一主基站发送的携带第一预设信息的切换请求应答消息；其中，所述第一预设信息包括：配置给所述第一主基站的所有流flow的第一身份标识和与所述第一身份标识对应的数据转发地址，以及配置给新增的第一从基站的所有flow的第二身份标识和与所述第二身份标识对应的数据转发地址；
    第二处理模块，用于根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发。
  27. 根据权利要求26所述的数据转发装置，其中，所述第二处理模块， 包括：
    第一获取子模块，用于获取与服务数据适配协议SDAP层在所述第二主基站的flow的身份标识相匹配的第一身份标识；
    第一处理子模块，用于根据获取到的第一身份标识所对应的数据转发地址，对获取到的第一身份标识所对应的flow进行转发；和/或
    第二获取子模块，用于获取与SDAP层在所述第二主基站的flow的身份标识相匹配的第二身份标识；
    第二处理子模块，用于根据获取到的第二身份标识所对应的数据转发地址，对获取到的第二身份标识所对应的flow进行转发。
  28. 根据权利要求26或27所述的数据转发装置，其中，所述第二处理模块，包括：
    第三处理子模块，用于根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
  29. 根据权利要求26所述的数据转发装置，还包括：
    第一发送模块，用于在根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，进行数据转发之前，根据所述第一身份标识、与所述第一身份标识对应的数据转发地址、所述第二身份标识以及与所述第二身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求；
    其中，所述第二预设信息包括：所述第一身份标识和/或第二身份标识对应的flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
    与所述第一身份标识对应的数据转发地址均为第一隧道地址，所述第一隧道地址用于向所述第一主基站转发数据；
    与所述第二身份标识对应的数据转发地址均为第二隧道地址，所述第二隧道地址用于向所述第一从基站转发数据。
  30. 根据权利要求29所述的数据转发装置，其中，所述第一发送模块，包括：
    第三获取子模块，用于获取所述第一身份标识和/或第二身份标识对应的flow中SDAP层在所述第二从基站的flow的身份标识以及与所述身份标识对应的数据转发地址；
    第一发送子模块，用于根据所述身份标识和与所述身份标识对应的数据转发地址，向第二从基站发送携带有第二预设信息的从基站释放请求。
  31. 一种数据转发装置，应用于第二从基站，包括：
    第三接收模块，用于接收第二主基站发送的携带有第二预设信息的从基站释放请求；其中，所述第二预设信息包括：第一身份标识和/或第二身份标识对应的流flow中服务数据适配协议SDAP层在所述第二从基站的flow的身份标识和与所述身份标识对应的数据转发地址；
    第三处理模块，用于根据所述身份标识和数据转发地址，进行数据转发；
    其中，所述第一身份标识为配置给第一主基站的flow的身份标识，所述第二身份标识为配置给新增的第一从基站的flow的身份标识；
    所述数据转发地址包括第一隧道地址和/或第二隧道地址，所述第一隧道地址用于向所述第一主基站转发数据，所述第二隧道地址用于向所述第一从基站转发数据。
  32. 根据权利要求31所述的数据转发装置，其中，所述第三处理模块，包括：
    第四处理子模块，用于根据所述身份标识和数据转发地址，将数据转发给所述第一主基站和/或第一从基站。
  33. 一种数据转发装置，应用于第一从基站，包括：
    第四接收模块，用于接收第二主基站和/或第二从基站直接转发的数据。
PCT/CN2019/114964 2018-11-02 2019-11-01 数据转发方法、装置、主基站及从基站 WO2020088634A1 (zh)

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