WO2016161785A1 - 跨MeNB切换方法、装置及基站 - Google Patents

跨MeNB切换方法、装置及基站 Download PDF

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Publication number
WO2016161785A1
WO2016161785A1 PCT/CN2015/091122 CN2015091122W WO2016161785A1 WO 2016161785 A1 WO2016161785 A1 WO 2016161785A1 CN 2015091122 W CN2015091122 W CN 2015091122W WO 2016161785 A1 WO2016161785 A1 WO 2016161785A1
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WIPO (PCT)
Prior art keywords
senb
menb
sipto
service
target menb
Prior art date
Application number
PCT/CN2015/091122
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English (en)
French (fr)
Inventor
高音
黄莹
梁爽
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US15/563,589 priority Critical patent/US10285104B2/en
Priority to EP15888337.1A priority patent/EP3282759B1/en
Publication of WO2016161785A1 publication Critical patent/WO2016161785A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • 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
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H04W36/125—Reselecting a serving backbone network switching or routing node involving different types of service backbones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/082—Mobility data transfer for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections
    • H04W76/36—Selective release of ongoing connections for reassigning the resources associated with the released connections

Definitions

  • the present invention relates to the field of communications, and in particular to a method, an apparatus, and a base station for handover across MeNBs.
  • the LTE architecture includes: a Mobility Management Entity (MME) and a Serving Gateway ( Serving GetWay (SGW for short) is a UU interface between a user equipment or a user equipment (UE) and a base station (eNodeB, eNB for short).
  • MME Mobility Management Entity
  • SGW Serving GetWay
  • UE user equipment
  • eNodeB base station
  • S1-MME S1 for the control
  • the plane interface is an S1-U interface between the eNB and the SGW, and an X2-U (X2-User plane) and an X2-C (X2-Control plane) interface between the eNBs.
  • the protocol stack of the S1-MME interface is divided into the following protocol layers from the bottom to the top: L1 protocol, L2 protocol, Internet Protocol (IP), and Stream Control Transmission Protocol (Stream Control Transmission Protocol). It is abbreviated as SCTP), S1 Application Protocol (S1-Application Protocol, S1-AP for short).
  • the protocol stack of the S1-U interface is divided into the following protocol layers from bottom to top: L1 protocol, L2 protocol, user data protocol/Internet protocol (UDP/IP), GPRS tunneling protocol-user plane (GTP- U, GPRS Tunneling Protocol-User plane).
  • L1 protocol L2 protocol
  • UDP/IP user data protocol/Internet protocol
  • GTP- U GPRS tunneling protocol-user plane
  • GTP- U GPRS Tunneling Protocol-User plane
  • FIG. 2 is a schematic diagram of an overall architecture of a small cell base station system, as shown in FIG. 2, the architecture includes: a Mobility Management Entity (MME), a Serving GateWay (SGW), a user equipment or A UU interface is used between the user equipment (the UE) and the eNodeB (the eNB for short).
  • the primary base station (Master eNB, MeNB for short) and the MME are S1-MME (S1 for the control plane).
  • the interface, the MeNB, the secondary eNB (SeNB) and the SGW are S1-U interfaces, and the eNBs are Xn interfaces.
  • the user data can be delivered from the core network to the user through the MeNB, or can be delivered to the user through the SeNB from the core network. After the user accesses the MeNB, the dual connection can be implemented by adding, modifying, and deleting the SeNB.
  • the UE and the core network support the always-on function, that is, after the data connection is established, the UE can send data to the external data network at any time, and the external data network can also The UE sends data.
  • the external data network referred to herein refers to an Internet Protocol (IP) network that is not part of the Public Land Mobile Network (PLMN) but is connected to the PLMN, such as a home internal network or the Internet.
  • IP Internet Protocol
  • LIPA@LN Local IP Access at Local Network
  • SIPTO@LN Select IP Traffic Offload at Local Network
  • L-GW Local GateWay, L-GW for short
  • LIPA or SIPTO service is set on the base station (which may be a macro base station or a home base station)
  • base station which may be a macro base station or a home base station
  • the base station where the L-GW is located needs to pass the IP address of the local L-GW through the UE-specific message.
  • the SIPTO/LIPA Packet Data Network Gateway (PDN GW) is selected to use the L-GW address provided by the (H)eNB instead of the DNS query. Therefore, the base station needs to carry the L-GW in the INITIAL UE MESSAGE (passed to the MME for the NAS layer security authentication between the network and the UE) and the UPLINK NAS TRANSPORT (Non-access stratum) message. IP address.
  • the present invention provides a handover method, apparatus, and base station across MeNBs.
  • a cross-MeNB handover method including: a target MeNB determines that a UE has established SIPTO/LIPA service on a SeNB before handover; and the target MeNB maintains or releases the SIPTO/LIPA service; The UE accesses the source MeNB and the SeNB through the dual connectivity before the handover, and the UE supports the connection of the SIPTO/LIPA service by using the dual connectivity to access the target MeNB and the SeNB after the handover.
  • the L-GW is set on the SeNB.
  • the target MeNB determines to maintain the SIPTO/LIPA service
  • the target MeNB maintains the SIPTO/LIPA service, where the target MeNB acquires service bearer information of the SIPTO/LIPA service;
  • the target MeNB sends the service bearer information to the MME.
  • the target MeNB maintaining the SIPTO/LIPA service further includes: the target MeNB transmitting the service bearer information to the SeNB .
  • the service bearer information includes at least one of the following: an evolved radio access bearer identifier (ERAB ID), a correlation identifier (Correlation ID), and L-GW address information.
  • EMB ID evolved radio access bearer identifier
  • Correlation ID correlation identifier
  • L-GW address information L-GW address information
  • the acquiring, by the target MeNB, the service bearer information of the SIPTO/LIPA service includes: the target MeNB receiving a handover request from the source MeNB, where the handover request carries the service bearer information.
  • the sending, by the target MeNB, the service bearer information to the SeNB includes: sending, by the target MeNB, an SeNB addition request or a SeNB modification request to the SeNB, where the SeNB adds a request or the SeNB modifies The request carries the service bearer information.
  • the sending, by the target MeNB, the service bearer information to the MME includes: sending, by the target MeNB, a path switch request to the MME, where the path switch request carries the service bearer information.
  • the target MeNB maintaining the SIPTO/LIPA service further includes: the SeNB receiving a UE context release message; the SeNB does not release the Said SIPTO / LIPA business.
  • the target MeNB releasing the SIPTO/LIPA service includes: the target MeNB acquiring service bearer information of the SIPTO/LIPA service; The target MeNB sends the service bearer information to the SeNB to instruct the SeNB to release the SIPTO/LIPA service.
  • the target MeNB sending, by the target MeNB, the service bearer information to the SeNB, the target MeNB sending the delete bearer list information to the SeNB, where the deleted bearer list information carries the service bearer information.
  • the target MeNB releasing the SIPTO/LIPA service further includes: the SeNB receiving the delete bearer list information/SeNB release message/UE text Release the message; the SeNB releases the SIPTO/LIPA service according to the deleted bearer list information/the SeNB release message/the UE text release message.
  • the method further includes: the target MeNB transmitting at least the IP address information of the set L-GW to the MME.
  • the sending, by the target MeNB, the IP address information of the set L-GW to the MME includes: sending, by the target MeNB, IP address information of the set L-GW and/or indicating the Let L-GW set the indication information of the location to the MME.
  • the indication information includes one of the following: a global identifier of the SeNB where the L-GW is set, and an indicator for indicating that the set L-GW is located at the SeNB.
  • a cross-MeNB handover method including: acquiring, by the target MeNB, IP address information of the L-GW on the SeNB; and transmitting, by the target MeNB, the IP address information to the MME
  • the UE accesses the source MeNB before the handover, and the UE accesses the target MeNB and the SeNB through the dual connectivity after the handover, and the set L-GW that supports the SIPTO/LIPA service is set in the Said on the SeNB.
  • the acquiring, by the target MeNB, the IP address information of the L-GW on the SeNB includes: the target MeNB receiving the handover request sent by the source MeNB, where the handover request carries the IP address information; or The target MeNB receives an SeNB addition request acknowledgement message sent by the SeNB, where the SeNB adds a request acknowledgement message. Carrying the IP address information.
  • the sending, by the target MeNB, the IP address information to the MME includes: sending, by the target MeNB, the IP address information and/or indication information for indicating the location of the set L-GW to the MME.
  • the indication information includes one of the following: a global identifier of the SeNB where the L-GW is set, and an indicator for indicating that the set L-GW is located at the SeNB.
  • a cross-MeNB switching apparatus is further applied to a target MeNB, including: a determining module, configured to determine that a UE has established a SIPTO/LIPA service on a SeNB before handover; a processing module, setting In order to maintain or release the SIPTO/LIPA service, wherein the UE accesses the source MeNB and the SeNB through a dual connectivity before handover, and the UE accesses the target MeNB and the SeNB through dual connectivity after handover
  • the set L-GW supporting the SIPTO/LIPA service is set on the SeNB.
  • the processing module includes: a first acquiring unit, configured to acquire service bearer information of the SIPTO/LIPA service; and a first sending unit, configured to send the service bearer information to the MME.
  • the processing module further includes: a second sending unit, configured to send the service bearer information to the SeNB.
  • the service bearer information includes at least one of the following: an ERAB ID, a Correlation ID, and L-GW address information.
  • the first acquiring unit is configured to: receive a handover request from the source MeNB, where the handover request carries the service bearer information.
  • the second sending unit is configured to: send an SeNB add request or a SeNB modify request to the SeNB, where the SeNB adds a request or the SeNB modification request carries the service bearer information.
  • the first sending unit is configured to send a path switching request to the MME, where the path switching request carries the service bearer information.
  • the processing module further includes: a second acquiring unit, configured to acquire service bearer information of the SIPTO/LIPA service; and a third sending unit, configured to send the service bearer information to the SeNB, to Instructing the SeNB to release the SIPTO/LIPA service.
  • a second acquiring unit configured to acquire service bearer information of the SIPTO/LIPA service
  • a third sending unit configured to send the service bearer information to the SeNB, to Instructing the SeNB to release the SIPTO/LIPA service.
  • the third sending unit is configured to: send the deleted bearer list information to the SeNB, where the deleted bearer list information carries the service bearer information.
  • the device further includes: a first sending module, configured to send at least the IP address information of the set L-GW to the MME.
  • a first sending module configured to send at least the IP address information of the set L-GW to the MME.
  • the first sending module is further configured to: send IP address information of the set L-GW and/or indication information used to indicate the location of the set L-GW to the MME.
  • the indication information includes one of the following: a global identifier of the SeNB where the L-GW is set, and An indicator indicating that the set L-GW is located at the SeNB.
  • a base station including: the foregoing cross-MeNB switching device.
  • a cross-MeNB switching apparatus is further applied to the target MeNB, including: an acquiring module, configured to acquire IP address information of the L-GW that is set on the SeNB; and a second sending module, The method is configured to send the IP address information to the MME, where the UE accesses the source MeNB before the handover, and the UE accesses the target MeNB and the SeNB through the dual connection after the handover, and supports the SIPTO/LIPA service.
  • the set L-GW is set on the SeNB.
  • the acquiring module is further configured to: receive a handover request sent by the source MeNB, where the handover request carries the IP address information; or receive an SeNB add request acknowledgement message sent by the SeNB, where The SeNB adds a request acknowledgement message carrying the IP address information.
  • the second sending module is further configured to: send the IP address information and/or indication information used to indicate the location of the set L-GW to the MME.
  • the indication information includes one of the following: a global identifier of the SeNB where the L-GW is set, and an indicator for indicating that the set L-GW is located at the SeNB.
  • a base station including: the foregoing cross-MeNB switching device.
  • the target MeNB determines that the UE has established SIPTO/LIPA service on the SeNB before the handover; the target MeNB maintains or releases the SIPTO/LIPA service; wherein the UE passes the dual-connection access source MeNB and the SeNB, UE before the handover.
  • the target MeNB and the SeNB are connected through the dual connectivity, and the L-GW supporting the SIPTO/LIPA service is set on the SeNB, which solves the problem that the SIPTO/LIPA service is not considered in the handover process of the MeNB in the related art.
  • the problem is to provide a SIPTO/LIPA service processing method in the process of handover across MeNBs.
  • FIG. 1 is a schematic diagram of an overall architecture of an LTE according to related art
  • FIG. 2 is a schematic diagram of a dual-connected user plane 1A architecture in a small base station scenario according to the related art
  • FIG. 3 is a schematic diagram of an architecture supporting SIPTO@LN and supporting a set L-GW in a SeNB according to the related art
  • FIG. 4 is a schematic flowchart 1 of a method for switching across MeNBs according to an embodiment of the present invention
  • FIG. 5 is a second schematic flowchart of a method for switching across MeNBs according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram 1 of a device for switching across MeNBs according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram 1 of an optional structure of a device for switching across MeNBs according to an embodiment of the present invention.
  • FIG. 8 is a second schematic diagram of an alternative structure of a device for switching across MeNBs according to an embodiment of the present invention.
  • FIG. 9 is a third schematic diagram of an optional structure of a device for switching across MeNBs according to an embodiment of the present invention.
  • FIG. 10 is a fourth schematic diagram of an alternative structure of a device for switching across MeNBs according to an embodiment of the present invention.
  • FIG. 11 is a second schematic structural diagram of a device for switching across MeNBs according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of a method for switching across MeNBs according to an alternative embodiment 1 of the present invention.
  • FIG. 13 is a schematic flowchart of a method for switching across MeNBs according to an optional embodiment 2 of the present invention.
  • FIG. 14 is a schematic flowchart of a method for switching across MeNBs according to an alternative embodiment 3 of the present invention.
  • FIG. 4 is a schematic flowchart 1 of a cross-MeNB handover method according to an embodiment of the present invention. As shown in FIG. 4, the process includes the following steps:
  • Step S402 the target MeNB determines that the UE has established SIPTO/LIPA service on the SeNB before handover;
  • Step S404 the target MeNB maintains or releases the SIPTO/LIPA service.
  • the UE accesses the source MeNB and the SeNB through the dual connectivity before the handover, and the UE accesses the target MeNB and the SeNB through the dual connectivity after the handover, and the L-GW supporting the SIPTO/LIPA service is set on the SeNB.
  • the target MeNB determines to maintain the SIPTO/LIPA service
  • the target MeNB maintains the SIPTO/LIPA service, including: the target MeNB acquires service bearer information of the SIPTO/LIPA service; and the target MeNB sends the service bearer information.
  • the target MeNB acquires service bearer information of the SIPTO/LIPA service
  • the target MeNB sends the service bearer information.
  • the target MeNB maintaining the SIPTO/LIPA service further includes: the target MeNB transmitting the service bearer information to the SeNB.
  • the foregoing service bearer information includes at least one of the following: an ERAB ID, a Correlation ID, and L-GW address information.
  • the target MeNB obtains the service bearer information of the SIPTO/LIPA service, where the target MeNB receives the handover request from the source MeNB, where the handover request carries the service bearer information.
  • the target MeNB obtains the service bearer information of the SIPTO/LIPA service, where the target MeNB receives the handover request from the source MeNB, where the handover request carries the service bearer information.
  • the target MeNB sends the service bearer information to the SeNB, where the target MeNB sends the SeNB addition request or the SeNB modification request to the SeNB, where the SeNB adds the request or the SeNB modification request carries the service bearer information.
  • the target MeNB sends the SeNB addition request or the SeNB modification request to the SeNB, where the SeNB adds the request or the SeNB modification request carries the service bearer information.
  • the target MeNB sends the service bearer information to the MME, where the target MeNB sends a path switch request to the MME, where the path switch request carries the service bearer information.
  • the target MeNB sends the service bearer information to the MME, where the target MeNB sends a path switch request to the MME, where the path switch request carries the service bearer information.
  • the target MeNB determines to maintain the SIPTO/LIPA service
  • the target MeNB maintains the SIPTO/LIPA service further includes: the SeNB receives the UE context release message; the SeNB does not release the SIPTO /LIPA service, and can release other services of UEs other than SIPTO/LIPA services. In this manner, other services before the handover on the SeNB can be released, and the SIPTO/LIPA service specified in the service bearer information is retained.
  • the target MeNB determines to release the SIPTO/LIPA service
  • the target MeNB releases the SIPTO/LIPA service, including: the target MeNB acquires service bearer information of the SIPTO/LIPA service; and the target MeNB sends the service bearer information.
  • the SeNB is given to instruct the SeNB to release the SIPTO/LIPA service. In this way, a method for releasing SIPTO/LIPA services is provided.
  • the target MeNB sends the service bearer information to the SeNB, where the target MeNB sends the delete bearer list information to the SeNB, where the deleted bearer list information carries the service bearer information.
  • the target MeNB sends the service bearer information to the SeNB, where the target MeNB sends the delete bearer list information to the SeNB, where the deleted bearer list information carries the service bearer information.
  • the target MeNB releasing the SIPTO/LIPA service further includes: the SeNB receiving the delete bearer list information/SeNB release message/UE text The message is released; the SeNB releases the SIPTO/LIPA service according to the Delete Bearer List Information/SeNB Release Message/UE Text Release message. In this way, the release of the SIPTO/LIPA service on the SeNB is implemented.
  • the method further includes: the target MeNB sending at least the IP address information of the L-GW to the MME.
  • the core network can be used for subsequent SIPTO/LIPA@LN service establishment according to the combined L-GW address information reported by the target MeNB.
  • the target MeNB sending at least the IP address information of the L-GW to the MME includes: sending by the target MeNB The IP address information of the L-GW and the indication information for indicating the location of the L-GW setting are set to the MME.
  • the indication information includes one of the following: a global identifier of the SeNB in which the L-GW is located, and an indicator for indicating that the setup L-GW is located in the SeNB.
  • FIG. 5 is a second schematic flowchart of a method for switching across MeNBs according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:
  • Step S502 The target MeNB acquires IP address information of the L-GW that is set on the SeNB.
  • Step S504 the target MeNB sends at least the IP address information to the MME.
  • the UE accesses the source MeNB before the handover, and the UE accesses the target MeNB and the SeNB through the dual connectivity after the handover, and the set L-GW supporting the SIPTO/LIPA service is set on the SeNB.
  • the acquiring, by the target MeNB, the IP address information of the L-GW on the SeNB includes: the target MeNB receiving the handover request sent by the source MeNB, where the handover request carries the IP address information; or the target MeNB receives The SeNB adds a request acknowledgement message sent by the SeNB, where the SeNB adds a request acknowledgement message carrying the IP address information.
  • the target MeNB transmitting the IP address information to the MME includes: the target MeNB sends the IP address information and/or the indication information used to indicate the set L-GW setting location to the MME.
  • the foregoing indication information includes one of the following: a global identifier of the SeNB where the L-GW is located, and an indicator for indicating that the set L-GW is located at the SeNB.
  • a cross-MeNB switching device is also provided to implement the foregoing embodiments and optional implementation manners, which have not been described again.
  • the modules involved in the device are described below.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 6 is a first schematic structural diagram of a cross-MeNB switching apparatus according to an embodiment of the present invention, where the apparatus is applied to a target MeNB.
  • the apparatus includes: a determining module 62 and a processing module 64, wherein the determining module 62 is configured to determine that the UE has established SIPTO/LIPA service on the SeNB before the handover; the processing module 64 is coupled to the determining module 62, The UE is configured to maintain or release the SIPTO/LIPA service.
  • the UE accesses the source MeNB and the SeNB through the dual connectivity before the handover.
  • the UE accesses the target MeNB and the SeNB through the dual connectivity after the handover, and supports the SIP-/LIPA service setup L-
  • the GW is set on the SeNB.
  • FIG. 7 is a schematic diagram of an optional structure of a device for switching across MeNBs according to an embodiment of the present invention.
  • the processing module 64 includes: a first obtaining unit 642 configured to acquire a service of a SIPTO/LIPA service. Carrying information; the first sending unit 644 is configured to send the service bearer information to the MME.
  • FIG. 8 is a schematic diagram of an optional structure of a device for switching across MeNBs according to an embodiment of the present invention.
  • the processing module 64 further includes: a second sending unit 646, configured to send service bearer information to SeNB.
  • the service bearer information includes at least one of the following: an ERAB ID, a Correlation ID, and L-GW address information.
  • the first obtaining unit 642 is configured to: receive a handover request from the source MeNB, where the handover request carries service bearer information.
  • the second sending unit 646 is configured to: send an SeNB add request or a SeNB modify request to the SeNB, where the SeNB adds the request or the SeNB modification request carries the service bearer information.
  • the first sending unit 644 is configured to: send a path switching request to the MME, where the path switching request carries the service bearer information.
  • FIG. 9 is a third schematic diagram of an optional structure of a device for switching across MeNBs according to an embodiment of the present invention.
  • the processing module 64 further includes: a second obtaining unit 648 configured to acquire SIPTO/LIPA services.
  • the service bearer information is configured to send the service bearer information to the SeNB to instruct the SeNB to release the SIPTO/LIPA service.
  • the third sending unit 649 is configured to: send the deleted bearer list information to the SeNB, where the deleted bearer list information carries the service bearer information.
  • FIG. 10 is a schematic diagram of an optional structure of a device for switching across a MeNB according to an embodiment of the present invention.
  • the device further includes: a first sending module 66 coupled to the processing module 64, configured to send at least The IP address information of the L-GW is set to the MME.
  • the first sending module 66 is further configured to: send IP address information of the combined L-GW and/or indication information for indicating the location of the L-GW setting to the MME.
  • the indication information includes one of the following: a global identifier of the SeNB where the L-GW is set up, and an indicator for indicating that the set L-GW is located at the SeNB.
  • the embodiment of the present invention further provides a base station including the foregoing MeNB switching device.
  • FIG. 11 is a schematic structural diagram of a cross-MeNB switching apparatus according to an embodiment of the present invention.
  • the apparatus includes: an obtaining module 112 and a second sending module 114, where the acquiring module 112 is configured to acquire an SeNB.
  • the IP address information of the L-GW is set.
  • the second sending module 114 is coupled to the obtaining module 112 and configured to send at least the IP address information to the MME.
  • the UE accesses the source MeNB before the handover, and the UE connects through the dual connection after the handover.
  • the target MeNB and the SeNB, and the set L-GW supporting the SIPTO/LIPA service are set on the SeNB.
  • the obtaining module 112 is further configured to: receive the handover request sent by the source MeNB, where the handover request carries the IP address information; or receive the SeNB add request acknowledgement message sent by the SeNB, where the SeNB adds the request acknowledgement message to carry Have IP address information.
  • the second sending module 114 is further configured to: send IP address information and/or to indicate a set L-GW setting bit.
  • the indication information is set to the MME.
  • the indication information includes one of the following: a global identifier of the SeNB where the L-GW is set up, and an indicator for indicating that the set L-GW is located at the SeNB.
  • the embodiment of the invention further provides a base station including the foregoing MeNB switching device.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • An alternative embodiment of the present invention provides a method for implementing handover in a small base station environment, so as to implement SIPTO@LN or LIPA@LN in a scenario of small cell environment switching, which is a problem to be solved in the embodiment of the present invention.
  • An alternative embodiment of the present invention provides a method for implementing handover in a small base station environment, and optimizes SIPTO/LIPA service processing in two scenarios: single connection switching to dual connectivity and dual connectivity switching to dual connectivity.
  • the base station that the UE connects before the handover is called the handover source base station, and the UE implements the dual connection with the handover target MeNB and the SeNB after the handover.
  • the set L-GW of SIPTO/LIPA@LN is on the SeNB.
  • the target MeNB acquires the IP address information of the L-GW that is set up on the SeNB.
  • the target MeNB may be acquired by using a handover request message sent by the source base station, or may be acquired by the SeNB adding a request acknowledgement message between the SeNB and the target MeNB.
  • the target MeNB may send the IP address information of the L-GW on the SeNB to the MME through the path switch request message.
  • the indication information that the L-GW is located in the MeNB or the SeNB may be included, and one or more of the following representations may be adopted: a global identifier of the SeNB where the L-GW is located, and the L-GW is located at the SeNB indicator.
  • the user can establish a SIPTO/LIPA@LN service on the SeNB.
  • the dual-connection is switched to dual-connection
  • the UE is dual-connected before the handover, and the handover source MeNB and the SeNB are connected.
  • the UE double-connects to the handover target MeNB and the SeNB, where the SeNB remains unchanged.
  • the set L-GW of SIPTO/LIPA@LN is on the SeNB.
  • the SIPTO/LIPA service can be maintained or the SIPTO/LIPA service can be released during the handover.
  • the target MeNB acquires SIPTO/LIPA service bearer information of the UE on the handover source side.
  • the SIPTO/LIPA bearer information (eg, ERAB ID, Correlation ID, and L-GW address information) may be sent to the target MeNB in the handover request message by the source MeNB;
  • the target MeNB decides to keep the SIPTO service unchanged, it needs to carry the SIPTO/LIPA bearer information in the handshake process with the SeNB, for example, the Evolved Radio Access Bearer ID (ERAB ID) and the correlation identifier. (Correlation ID) and L-GW address information, such as carried in the SeNB Add Request or SeNB Modify Request message.
  • Evolved Radio Access Bearer ID Evolved Radio Access Bearer ID
  • correlation ID correlation ID
  • L-GW address information such as carried in the SeNB Add Request or SeNB Modify Request message.
  • the target MeNB sends the SIPTO/LIPA bearer information (eg, ERAB ID, Correlation ID, and L-GW address information) information that remains unchanged on the SeNB to the MME through the Path Switch Request message.
  • SIPTO/LIPA bearer information eg, ERAB ID, Correlation ID, and L-GW address information
  • the handover target MeNB may send the IP address information of the L-GW on the SeNB to the MME, or optionally include the indication information that the L-GW is located in the MeNB or the SeNB, and may adopt one or more of the following representations.
  • Form The global identifier of the SeNB where the L-GW is located, and the L-GW is located at the SeNB indicator.
  • the SeNB After the handover process is completed, when the SeNB receives the UE text release message, the SeNB should not release the SIPTO/LIPA bearer.
  • the target MeNB acquires SIPTO/LIPA service bearer information of the UE on the handover source side.
  • the SIPTO/LIPA bearer information (eg, ERAB ID, Correlation ID, and L-GW address information) may be sent to the target MeNB in the handover request message by the source MeNB;
  • the target MeNB decides to release the SIPTO/LIPA service, it needs to notify the SeNB in the handshake process with the SeNB, for example, the SIPTO/LIPA bearer information exists in the deleted bearer list.
  • the SeNB releases the local SIPTO/LIPA service.
  • the SeNB may locally release the SIPTO/LIPA service in the handshake process or after receiving the SeNB release message or receiving the UE text release message after the handover process is completed.
  • the target MeNB may send the IP address information of the L-GW on the SeNB to the MME through the path switch request message.
  • the indication information that the L-GW is located in the MeNB or the SeNB may be included, and one or more of the following representations may be adopted: a global identifier of the SeNB where the L-GW is located, and the L-GW is located at the SeNB indicator.
  • the present invention is not limited to the LTE system, and the third generation communication system (3G system) is also applicable.
  • Scenario 1 Single-switching dual-switching scenario.
  • the L-GW is set up in the SeNB.
  • the UE Before the handover, the UE is a single connection.
  • the UE implements dual connectivity and establishes a SIPTO/LIPA bearer on the SeNB.
  • Step 1 The source MeNB (S-MeNB) sends an X2 handover request message to the target MeNB (T-MeNB).
  • the IP address information of the L-GW is set on the SeNB, and the source MeNB can obtain the IP address information of the L-GW on the SeNB through the X2 interface process.
  • the indication information of the L-GW in the MeNB or the SeNB is optionally included.
  • Step 2 The T-MeNB sends a SeNB Add Request message to the SeNB according to the dual connectivity indication information in the X2 handover request message.
  • Step 3 The SeNB replies to the SeNB Add Request Acknowledgement message to the T-MeNB.
  • the IP address information of the L-GW is set on the SeNB.
  • Step 4 The T-MeNB replies to the X2 handover request acknowledgement message to the S-MeNB.
  • Steps 5 to 8 The UE air interface is synchronized and accesses the T-MeNB and the SeNB.
  • Step 9 The T-MeNB sends an SeNB reconfiguration complete message to the SeNB.
  • Steps 10-11 The T-MeNB sends a Sequence Number (SN) status transmission message to the SeNB and starts data forwarding.
  • SN Sequence Number
  • Steps 12-14 The T-MeNB sends a Path Switch Request message to the MME to notify the new downlink path (from S-MeNB->T-MeNB).
  • the path switch request message may optionally include the IP address information of the L-GW on the SeNB, and optionally, the indication information of the L-GW in the MeNB or the SeNB.
  • the core network may be used for subsequent SIPTO/LIPA@LN service establishment according to the combined L-GW address information reported by the MeNB.
  • Step 15 The MME replies with a Path Switch Request Acknowledgement message to the T-MeNB.
  • Step 16 The T-MeNB sends a UE context release message to the S-MeNB to trigger release of resources in the S-MeNB.
  • Scenario 2 Dual-switched dual-switching scenario.
  • the UE is dual-connected before the handover, and connects the handover source MeNB and the SeNB. After the handover, the UE double-connects to the handover target MeNB and the SeNB, where the SeNB remains unchanged.
  • the set L-GW of SIPTO/LIPA@LN is on the SeNB.
  • the SIPTO/LIPA service remains unchanged before and after the switchover.
  • Step 1 The S-MeNB sends an X2 Handover Request message to the T-MeNB.
  • Step 2 The T-MeNB sends a SeNB Add Request message to the SeNB according to the dual connectivity indication information in the X2 handover request message. If the target MeNB decides to keep the SIPTO/LIPA service unchanged, the SeNB addition request message includes SIPTO/LIPA bearer information (for example, ERAB ID, Correlation ID, and L-GW address information).
  • SIPTO/LIPA bearer information for example, ERAB ID, Correlation ID, and L-GW address information.
  • Step 3 The SeNB replies to the SeNB Add Request Acknowledgement message to the T-MeNB.
  • Step 4 The T-MeNB replies to the X2 handover request acknowledgement message to the S-MeNB.
  • Step 5 The S-MeNB sends a SeNB release message to the SeNB, and the SeNB stops sending data to the UE.
  • Steps 6-9 The UE implements air interface synchronization and accesses the T-MeNB and the SeNB.
  • Step 10 The T-MeNB sends an SeNB reconfiguration complete message to the SeNB.
  • Steps 11 to 12 The T-MeNB sends an SN status transmission message to the SeNB and starts data forwarding.
  • Steps 13 to 15 The T-MeNB sends a Path Switch Request message to the MME to notify the new downlink path (from S-MeNB->T-MeNB).
  • the target MeNB sends the SIPTO/LIPA bearer information (eg, ERAB ID, Correlation ID, and L-GW address information) information that remains unchanged on the SeNB to the MME through the Path Switch Request message.
  • the handover target MeNB may send the IP address information of the L-GW on the SeNB to the MME, or optionally include the indication information that the L-GW is located in the MeNB or the SeNB, and may adopt one or more of the following representations.
  • the core network may be used for subsequent SIPTO/LIPA@LN service establishment according to the combined L-GW address information reported by the MeNB.
  • Step 16 The MME replies with a Path Switch Request Acknowledgement message to the T-MeNB.
  • Step 17 The T-MeNB sends a UE context release message to the S-MeNB to trigger release of resources in the S-MeNB.
  • Step 18 The S-MeNB may optionally send a UE context release message to the SeNB.
  • the SeNB only releases the local resources related to the UE and the S-MeNB, and the services reserved on the SeNB after the handover are not released, including the SIPTO/LIPA service.
  • Scenario 3 Dual-switching dual-switching scenario, the UE is dual-connected before the handover, and connects the handover source MeNB and the SeNB. After the handover, the UE double-connects to the handover target MeNB and the SeNB, where the SeNB remains unchanged.
  • the set L-GW of SIPTO/LIPA@LN is on the SeNB. The SIPTO/LIPA service is released after switching.
  • Step 1 The S-MeNB sends an X2 Handover Request message to the T-MeNB.
  • Step 2 The T-MeNB sends a SeNB Add Request message to the SeNB according to the dual connectivity indication information in the X2 handover request message. If the target MeNB decides to release the SIPTO/LIPA service, the SeNB add request message includes the SIPTO/LIPA bearer information to be released.
  • Step 3 The SeNB replies to the SeNB Add Request Acknowledgement message to the T-MeNB.
  • Step 4 The T-MeNB replies to the X2 handover request acknowledgement message to the S-MeNB.
  • Step 5 The S-MeNB sends a SeNB release message to the SeNB, and the SeNB stops sending data to the UE.
  • Steps 6-9 The UE implements air interface synchronization and accesses the T-MeNB and the SeNB.
  • Step 10 The T-MeNB sends an SeNB reconfiguration complete message to the SeNB.
  • Steps 11 to 12 The T-MeNB sends an SN status transmission message to the SeNB and starts data forwarding.
  • Steps 13 to 15 The T-MeNB sends a Path Switch Request message to the MME to notify the new downlink path (from S-MeNB->T-MeNB).
  • the target MeNB sends the SIPTO/LIPA bearer information (for example, ERAB ID, Correlation ID, and L-GW address information) information that needs to be released on the SeNB to the MME through the path switch request message.
  • SIPTO/LIPA bearer information for example, ERAB ID, Correlation ID, and L-GW address information
  • the handover target MeNB may optionally send the IP address information of the L-GW on the SeNB to the MME, or optionally include the indication information that the L-GW is located in the MeNB or the SeNB, and may adopt one or more of the following forms: L- The global identifier of the SeNB where the GW is located, and the L-GW is located at the SeNB indicator.
  • the core network may be used for subsequent SIPTO/LIPA@LN service establishment according to the combined L-GW address information reported by the MeNB.
  • Step 16 The MME replies with a Path Switch Request Acknowledgement message to the T-MeNB.
  • Step 17 The T-MeNB sends a UE context release message to the S-MeNB to trigger release of resources in the S-MeNB.
  • Step 18 The S-MeNB may optionally send a UE context release message to the SeNB.
  • the SeNB may locally release the SIPTO/LIPA service in the handshake process with the target MeNB, or after receiving the SeNB release message, or receiving the UE text release message after the handover process is completed.
  • the SeNB may also determine whether to release the SIPTO/LIPA service.
  • the foregoing embodiments and optional embodiments of the present invention provide a method for implementing handover in a small base station environment, and the foregoing method can be used for dual connectivity service characteristics in a complex small base station environment. How to effectively implement SIPTO@LN and LIPA@LN functions in the process is beneficial to improve network performance.
  • a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.
  • the present invention uses the target MeNB to determine that the UE has established SIPTO/LIPA service on the SeNB before handover; the target MeNB maintains or releases the SIPTO/LIPA service; wherein the UE passes the dual-connection access source before handover The MeNB and the SeNB, the UE accesses the target MeNB and the SeNB through the dual connectivity after the handover, and the manner in which the L-GW supporting the SIPTO/LIPA service is set on the SeNB is solved, and the SIPTO/ is not considered in the handover process of the MeNB in the related art.
  • the problem of processing LIPA services thereby providing a SIPTO/LIPA service processing method in the process of handover across MeNBs.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they can be stored in the storage device Executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that herein, or they may be fabricated into individual integrated circuit modules, or multiple of them. Or the steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

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Abstract

本发明提供了一种跨主基站(MeNB)切换方法、装置及基站。其中，该方法包括：目标MeNB确定切换前UE已经在从基站(SeNB)上建立选定的因特网协议流量卸载(SIPTO)/本地因特网协议接入(LIPA)业务；目标MeNB保持或者释放SIPTO/LIPA业务；其中，用户终端(UE)在切换前通过双连接接入源MeNB和SeNB，UE在切换后通过双连接接入目标MeNB和SeNB，支持SIPTO/LIPA业务的合设本地网关(L-GW)设置在SeNB上。通过本发明，解决了相关技术中跨MeNB切换过程中尚未考虑SIPTO/LIPA业务的处理的问题，从而提供了跨MeNB切换过程中的SIPTO/LIPA业务处理方法。

Description

跨MeNB切换方法、装置及基站 技术领域
本发明涉及通信领域，具体而言，涉及一种跨MeNB切换方法、装置及基站。
背景技术
图1为现有技术中长期演进系统(Long Term Evolution，简称为LTE)的总体架构示意图，如图1所示，LTE架构包括：移动管理实体(Mobility Management Entity，简称为MME)，服务网关(Serving GetWay，简称为SGW)，用户设备或称为终端(User Equipment，简称为UE)和基站(eNodeB，简称为eNB)之间是UU接口，eNB和MME之间是S1-MME(S1for the control plane)接口，eNB和SGW之间是S1-U接口，eNB之间是X2-U(X2-User plane)和X2-C(X2-Control plane)接口。
在LTE中，S1-MME接口的协议栈从下往上分为以下几个协议层：L1协议，L2协议，因特网协议(Internet Protocol，简称为IP)，流控制传输协议(Stream Control Transmission Protocol，简称为SCTP)，S1应用协议(S1-Application Protocol，简称为S1-AP)。
在LTE中，S1-U接口的协议栈从下往上分为以下几个协议层：L1协议，L2协议，用户数据协议/因特网协议(UDP/IP)，GPRS隧道协议-用户面(GTP-U，GPRS Tunneling Protocol-User plane)。
目前，由于频谱资源的匮乏，以及移动用户的大流量业务的激增，为了增加用户吞吐量和增强移动性能，采用高频点如3.5GHz进行热点覆盖的需求日益明显，采用低功率的节点成为新的应用场景。但是，由于高频点的信号衰减比较厉害，新小区的覆盖范围比较小，并且与现有的小区不共站点，因此，如果用户在这些新小区之间进行移动，或者在新小区和现有小区间移动，必定会引起频繁的切换过程，使得基站间频繁传递用户信息，从而对核心网造成了很大的信令冲击。基于此考虑，遏制了无线侧的大量小蜂窝基站的引入。
图2为一种小蜂窝基站系统总体架构示意图，如图2所示，该架构包括：移动管理实体(Mobility Management Entity，简称为MME)，服务网关(Serving GateWay，简称为SGW)，用户设备或称为终端(User Equipment，简称为UE)和基站(eNodeB，简称为eNB)之间是UU接口，主基站(Master eNB，简称为MeNB)和MME之间是S1-MME(S1for the control plane)接口，MeNB、从基站(Secondary eNB，简称为SeNB)和SGW之间是S1-U接口，eNB之间是Xn接口。用户数据可以从核心网通过MeNB下发到用户，也可以从核心网通过SeNB下发到用户。当用户在MeNB接入后，可以通过添加、修改、删除SeNB的方式实现双连接。
同时，随着用户对本地业务和因特网业务的广泛需求，对UE和核心网来说支持永远在线功能，即数据连接建立后，UE可以随时向外部数据网络发送数据，外部数据网络也可以向 UE发送数据。本文中涉及的外部数据网络是指不属于公用陆地移动通信网(PLMN)，但是与PLMN有连接的因特网协议(IP)网络，比如可以是家庭内部网络或者因特网(Internet)。我们称为LIPA@LN(Local IP Access at Local Network,本地网络本地IP接入)或者SIPTO@LN(Selected IP Traffic Offload at Local Network,本地网络选定的IP流量卸载)功能。若支持LIPA或者SIPTO业务的本地网关(Local GateWay，简称为L-GW)设置在基站上(可以是宏基站也可以是家庭基站)，我们称为合设L-GW(collocated L-GW)，支持SIPTO@LN且合设L-GW的系统架构图见图3。
在现有的LTE系统下，为了实现SIPTO@LN或LIPA@LN功能，在合设L-GW的场景下，合设L-GW所在的基站需要将本地L-GW的IP地址通过UE专用消息上报给核心网，SIPTO/LIPA业务分组数据网关(Packet Data Network Gateway，简称为PDN GW)选择是使用(H)eNB提供的L-GW地址，而不是DNS查询。因此，基站需要在INITIAL UE MESSAGE(传给MME，用于网络和UE之间NAS层的安全认证)和UPLINK NAS TRANSPORT(上行非接入层传输，Non-access stratum)消息中携带L-GW的IP地址。在上述小基站系统下，由于引入了MeNB和SeNB的概念，当用户在小基站环境下进行跨MeNB的切换，如果合设L-GW所在的基站为SeNB，需要考虑切换流程对SIPTO/LIPA业务的影响。
针对相关技术中跨MeNB切换过程中尚未考虑SIPTO/LIPA业务的处理的问题，目前没有提出有效的解决方案。
发明内容
为了解决上述技术问题，本发明提供了一种跨MeNB切换方法、装置及基站。
根据本发明实施例的一个方面，提供了一种跨MeNB切换方法，包括：目标MeNB确定切换前UE已经在SeNB上建立SIPTO/LIPA业务；所述目标MeNB保持或者释放所述SIPTO/LIPA业务；其中，所述UE在切换前通过双连接接入源MeNB和所述SeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持所述SIPTO/LIPA业务的合设L-GW设置在所述SeNB上。
可选地，在所述目标MeNB确定保持所述SIPTO/LIPA业务的情况下，所述目标MeNB保持所述SIPTO/LIPA业务包括：所述目标MeNB获取所述SIPTO/LIPA业务的业务承载信息；所述目标MeNB将所述业务承载信息发送给MME。
可选地，在所述目标MeNB确定保持所述SIPTO/LIPA业务的情况下，所述目标MeNB保持所述SIPTO/LIPA业务还包括：所述目标MeNB将所述业务承载信息发送给所述SeNB。
可选地，所述业务承载信息包括以下至少之一：演进的无线接入承载标识(ERAB ID)、相关性标识(Correlation ID)、L-GW地址信息。
可选地，所述目标MeNB获取所述SIPTO/LIPA业务的业务承载信息包括：所述目标MeNB接收来自所述源MeNB的切换请求，其中，所述切换请求中携带有所述业务承载信息。
可选地，所述目标MeNB将所述业务承载信息发送给所述SeNB包括：所述目标MeNB发送SeNB添加请求或者SeNB修改请求至所述SeNB，其中，所述SeNB添加请求或者所述SeNB修改请求中携带有所述业务承载信息。
可选地，所述目标MeNB将所述业务承载信息发送给MME包括：所述目标MeNB发送路径切换请求至所述MME，其中，所述路径切换请求中携带有所述业务承载信息。
可选地，在所述目标MeNB确定保持所述SIPTO/LIPA业务的情况下，所述目标MeNB保持所述SIPTO/LIPA业务还包括：所述SeNB接收UE上下文释放消息；所述SeNB不释放所述SIPTO/LIPA业务。
可选地，在所述目标MeNB确定释放所述SIPTO/LIPA业务的情况下，所述目标MeNB释放所述SIPTO/LIPA业务包括：所述目标MeNB获取所述SIPTO/LIPA业务的业务承载信息；所述目标MeNB将所述业务承载信息发送给所述SeNB，以指示所述SeNB释放所述SIPTO/LIPA业务。
可选地，所述目标MeNB将所述业务承载信息发送给所述SeNB包括：所述目标MeNB发送删除承载列表信息至所述SeNB，其中，所述删除承载列表信息中携带有所述业务承载信息。
可选地，在所述目标MeNB确定释放所述SIPTO/LIPA业务的情况下，所述目标MeNB释放所述SIPTO/LIPA业务还包括：所述SeNB接收删除承载列表信息/SeNB释放消息/UE文本释放消息；所述SeNB根据所述删除承载列表信息/所述SeNB释放消息/所述UE文本释放消息，释放所述SIPTO/LIPA业务。
可选地，在所述目标MeNB保持或者释放所述SIPTO/LIPA业务之后，所述方法还包括：所述目标MeNB至少发送所述合设L-GW的IP地址信息至MME。
可选地，所述目标MeNB至少发送所述合设L-GW的IP地址信息至MME包括：所述目标MeNB发送所述合设L-GW的IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
可选地，所述指示信息包括以下之一：所述合设L-GW所在的SeNB的全局标志符、用于指示所述合设L-GW位于SeNB的指示符。
根据本发明实施例的另一个方面，还提供了一种跨MeNB切换方法，包括：目标MeNB获取SeNB上合设L-GW的IP地址信息；所述目标MeNB至少发送所述IP地址信息至MME；其中，所述UE在切换前接入源MeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持SIPTO/LIPA业务的所述合设L-GW设置在所述SeNB上。
可选地，目标MeNB获取SeNB上合设L-GW的IP地址信息包括：所述目标MeNB接收所述源MeNB发送的切换请求，其中，所述切换请求中携带有所述IP地址信息；或者所述目标MeNB接收SeNB发送的SeNB添加请求确认消息，其中，所述SeNB添加请求确认消息中 携带有所述IP地址信息。
可选地，所述目标MeNB至少发送所述IP地址信息至MME包括：所述目标MeNB发送所述IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
可选地，所述指示信息包括以下之一：所述合设L-GW所在的SeNB的全局标志符、用于指示所述合设L-GW位于SeNB的指示符。
根据本发明实施例的另一个方面，还提供了一种跨MeNB切换装置，应用于目标MeNB，包括：确定模块，设置为确定切换前UE已经在SeNB上建立SIPTO/LIPA业务；处理模块，设置为保持或者释放所述SIPTO/LIPA业务；其中，所述UE在切换前通过双连接接入源MeNB和所述SeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持所述SIPTO/LIPA业务的合设L-GW设置在所述SeNB上。
可选地，所述处理模块包括：第一获取单元，设置为获取所述SIPTO/LIPA业务的业务承载信息；第一发送单元，设置为将所述业务承载信息发送给MME。
可选地，所述处理模块还包括：第二发送单元，设置为将所述业务承载信息发送给所述SeNB。
可选地，所述业务承载信息包括以下至少之一：ERAB ID、Correlation ID、L-GW地址信息。
可选地，所述第一获取单元设置为：接收来自所述源MeNB的切换请求，其中，所述切换请求中携带有所述业务承载信息。
可选地，所述第二发送单元设置为：发送SeNB添加请求或者SeNB修改请求至所述SeNB，其中，所述SeNB添加请求或者所述SeNB修改请求中携带有所述业务承载信息。
可选地，所述第一发送单元设置为：发送路径切换请求至所述MME，其中，所述路径切换请求中携带有所述业务承载信息。
可选地，所述处理模块还包括：第二获取单元，设置为获取所述SIPTO/LIPA业务的业务承载信息；第三发送单元，设置为将所述业务承载信息发送给所述SeNB，以指示所述SeNB释放所述SIPTO/LIPA业务。
可选地，所述第三发送单元设置为：发送删除承载列表信息至所述SeNB，其中，所述删除承载列表信息中携带有所述业务承载信息。
可选地，所述装置还包括：第一发送模块，设置为至少发送所述合设L-GW的IP地址信息至MME。
可选地，所述第一发送模块还设置为：发送所述合设L-GW的IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
可选地，所述指示信息包括以下之一：所述合设L-GW所在的SeNB的全局标志符、用 于指示所述合设L-GW位于SeNB的指示符。
根据本发明实施例的另一个方面，还提供了一种基站，包括：上述的跨MeNB切换装置。
根据本发明实施例的另一个方面，还提供了一种跨MeNB切换装置，应用于目标MeNB，包括：获取模块，设置为获取SeNB上合设L-GW的IP地址信息；第二发送模块，设置为至少发送所述IP地址信息至MME；其中，所述UE在切换前接入源MeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持SIPTO/LIPA业务的所述合设L-GW设置在所述SeNB上。
可选地，获取模块还设置为：接收所述源MeNB发送的切换请求，其中，所述切换请求中携带有所述IP地址信息；或者接收SeNB发送的SeNB添加请求确认消息，其中，所述SeNB添加请求确认消息中携带有所述IP地址信息。
可选地，所述第二发送模块还设置为：发送所述IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
可选地，所述指示信息包括以下之一：所述合设L-GW所在的SeNB的全局标志符、用于指示所述合设L-GW位于SeNB的指示符。
根据本发明实施例的另一个方面，还提供了一种基站，包括：上述的跨MeNB切换装置。
通过本发明实施例，采用目标MeNB确定切换前UE已经在SeNB上建立SIPTO/LIPA业务；目标MeNB保持或者释放SIPTO/LIPA业务；其中，UE在切换前通过双连接接入源MeNB和SeNB，UE在切换后通过双连接接入目标MeNB和SeNB，支持SIPTO/LIPA业务的合设L-GW设置在SeNB上的方式，解决了相关技术中跨MeNB切换过程中尚未考虑SIPTO/LIPA业务的处理的问题，从而提供了跨MeNB切换过程中的SIPTO/LIPA业务处理方法。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据相关技术的LTE总体架构示意图；
图2是根据相关技术的小基站场景下双连接用户面1A架构示意图；
图3是根据相关技术的支持SIPTO@LN且支持合设L-GW在SeNB的架构示意图；
图4是根据本发明实施例的跨MeNB切换方法的流程示意图一；
图5是根据本发明实施例的跨MeNB切换方法的流程示意图二；
图6是根据本发明实施例的跨MeNB切换装置的结构示意图一；
图7是根据本发明实施例的跨MeNB切换装置的可选结构示意图一；
图8是根据本发明实施例的跨MeNB切换装置的可选结构示意图二；
图9是根据本发明实施例的跨MeNB切换装置的可选结构示意图三；
图10是根据本发明实施例的跨MeNB切换装置的可选结构示意图四；
图11是根据本发明实施例的跨MeNB切换装置的结构示意图二；
图12是根据本发明可选实施例1的跨MeNB切换方法的流程示意图；
图13是根据本发明可选实施例2的跨MeNB切换方法的流程示意图；
图14是根据本发明可选实施例3的跨MeNB切换方法的流程示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。
本发明实施例提供了一种跨MeNB切换方法，图4是根据本发明实施例的跨MeNB切换方法的流程示意图一，如图4所示，该流程包括如下步骤：
步骤S402，目标MeNB确定切换前UE已经在SeNB上建立SIPTO/LIPA业务；
步骤S404，目标MeNB保持或者释放SIPTO/LIPA业务；
其中，UE在切换前通过双连接接入源MeNB和SeNB，UE在切换后通过双连接接入目标MeNB和SeNB，支持SIPTO/LIPA业务的合设L-GW设置在SeNB上。
通过上述步骤，提出了一种在跨MeNB切换时，由双连接切换至另一个双连接时，SIPTO/LIPA业务的处理方法，解决了相关技术中跨MeNB切换过程中尚未考虑SIPTO/LIPA业务的处理的问题。
可选地，在目标MeNB确定保持SIPTO/LIPA业务的情况下，在步骤S404中，目标MeNB保持SIPTO/LIPA业务包括：目标MeNB获取SIPTO/LIPA业务的业务承载信息；目标MeNB将业务承载信息发送给MME。通过该方式，提供了一种在切换过程中传递业务承载信息的方法。
可选地，在步骤S404中，目标MeNB保持SIPTO/LIPA业务还包括：目标MeNB将业务承载信息发送给SeNB。
可选地，上述的业务承载信息包括以下至少之一：ERAB ID、Correlation ID、L-GW地址信息。
可选地，目标MeNB获取SIPTO/LIPA业务的业务承载信息包括：目标MeNB接收来自源MeNB的切换请求，其中，切换请求中携带有业务承载信息。通过该方式，提供了通过切换请求获取业务承载信息的方式。
可选地，目标MeNB将业务承载信息发送给SeNB包括：目标MeNB发送SeNB添加请求或者SeNB修改请求至SeNB，其中，SeNB添加请求或者SeNB修改请求中携带有业务承载信息。通过该方式，提供了一种通过SeNB添加或者修改过程传递业务承载信息的方式。
可选地，目标MeNB将业务承载信息发送给MME包括：目标MeNB发送路径切换请求至MME，其中，路径切换请求中携带有业务承载信息。通过该方式，提供了一种通过路切换请求将业务承载信息上报MME的方式。
可选地，为了释放SeNB在切换前关于UE的其他业务，在目标MeNB确定保持SIPTO/LIPA业务的情况下，目标MeNB保持SIPTO/LIPA业务还包括：SeNB接收UE上下文释放消息；SeNB不释放SIPTO/LIPA业务，而可以释放除SIPTO/LIPA业务之外的UE的其他业务。通过该方式，可以将SeNB上切换前的其他业务释放，而保留了业务承载信息中指明的SIPTO/LIPA业务。
可选地，在目标MeNB确定释放SIPTO/LIPA业务的情况下，在步骤S404中，目标MeNB释放SIPTO/LIPA业务包括：目标MeNB获取SIPTO/LIPA业务的业务承载信息；目标MeNB将业务承载信息发送给SeNB，以指示SeNB释放SIPTO/LIPA业务。通过该方式，提供了一种SIPTO/LIPA业务的释放方法。
可选地，目标MeNB将业务承载信息发送给SeNB包括：目标MeNB发送删除承载列表信息至SeNB，其中，删除承载列表信息中携带有业务承载信息。通过该方式，提供了一种通过删除承载列表释放SIPTO/LIPA业务的方法。
可选地，为了释放SeNB上的SIPTO/LIPA业务，在目标MeNB确定释放SIPTO/LIPA业务的情况下，目标MeNB释放SIPTO/LIPA业务还包括：SeNB接收删除承载列表信息/SeNB释放消息/UE文本释放消息；SeNB根据删除承载列表信息/SeNB释放消息/UE文本释放消息，释放SIPTO/LIPA业务。通过该方式，实现了SeNB上的SIPTO/LIPA业务的释放。
可选地，在目标MeNB保持或者释放SIPTO/LIPA业务之后，方法还包括：目标MeNB至少发送合设L-GW的IP地址信息至MME。通过该方式，使得核心网可以根据目标MeNB上报的合设L-GW地址信息用于后续的SIPTO/LIPA@LN业务建立。
可选地，目标MeNB至少发送合设L-GW的IP地址信息至MME包括：目标MeNB发送 合设L-GW的IP地址信息和用于指示合设L-GW设置位置的指示信息至MME。
其中，指示信息包括以下之一：合设L-GW所在的SeNB的全局标志符、用于指示合设L-GW位于SeNB的指示符。
本发明实施例还提供了一种跨MeNB切换方法，该方法应用于由源MeNB切换至目标MeNB和SeNB的双连接过程中。图5是根据本发明实施例的跨MeNB切换方法的流程示意图二，如图5所示，该流程包括如下步骤：
步骤S502，目标MeNB获取SeNB上合设L-GW的IP地址信息；
步骤S504，目标MeNB至少发送IP地址信息至MME。
其中，UE在切换前接入源MeNB，UE在切换后通过双连接接入目标MeNB和SeNB，支持SIPTO/LIPA业务的合设L-GW设置在SeNB上。
通过上述步骤，提供了一种由单连接切换至双连接时的SIPTO/LIPA业务的处理方法，从而解决了相关技术中跨MeNB切换过程中尚未考虑SIPTO/LIPA业务的处理的问题。
可选地，在步骤S502中，目标MeNB获取SeNB上合设L-GW的IP地址信息包括：目标MeNB接收源MeNB发送的切换请求，其中，切换请求中携带有IP地址信息；或者目标MeNB接收SeNB发送的SeNB添加请求确认消息，其中，SeNB添加请求确认消息中携带有IP地址信息。
可选地，在步骤S504中，目标MeNB至少发送IP地址信息至MME包括：目标MeNB发送IP地址信息和/或用于指示合设L-GW设置位置的指示信息至MME。
可选地，上述的指示信息包括以下之一：合设L-GW所在的SeNB的全局标志符、用于指示合设L-GW位于SeNB的指示符。
在本实施例中还提供了一种跨MeNB切换装置，用于实现上述实施例及可选实施方式，已经进行过说明的不再赘述，下面对该装置中涉及到的模块进行说明。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图6是根据本发明实施例的跨MeNB切换装置的结构示意图一，该装置应用于目标MeNB。如图6所示，该装置包括：确定模块62和处理模块64，其中，确定模块62，设置为确定切换前UE已经在SeNB上建立SIPTO/LIPA业务；处理模块64，耦合至确定模块62，设置为保持或者释放SIPTO/LIPA业务；其中，UE在切换前通过双连接接入源MeNB和SeNB，UE在切换后通过双连接接入目标MeNB和SeNB，支持SIPTO/LIPA业务的合设L-GW设置在SeNB上。
图7是根据本发明实施例的跨MeNB切换装置的可选结构示意图一，如图7所示，可选地，处理模块64包括：第一获取单元642，设置为获取SIPTO/LIPA业务的业务承载信息；第一发送单元644，设置为将业务承载信息发送给MME。
图8是根据本发明实施例的跨MeNB切换装置的可选结构示意图二，如图8所示，可选地，处理模块64还包括：第二发送单元646，设置为将业务承载信息发送给SeNB。
可选地，业务承载信息包括以下至少之一：ERAB ID、Correlation ID、L-GW地址信息。
可选地，第一获取单元642设置为：接收来自源MeNB的切换请求，其中，切换请求中携带有业务承载信息。
可选地，第二发送单元646设置为：发送SeNB添加请求或者SeNB修改请求至SeNB，其中，SeNB添加请求或者SeNB修改请求中携带有业务承载信息。
可选地，第一发送单元644设置为：发送路径切换请求至MME，其中，路径切换请求中携带有业务承载信息。
图9是根据本发明实施例的跨MeNB切换装置的可选结构示意图三，如图9所示，可选地，处理模块64还包括：第二获取单元648，设置为获取SIPTO/LIPA业务的业务承载信息；第三发送单元649，设置为将业务承载信息发送给SeNB，以指示SeNB释放SIPTO/LIPA业务。
可选地，第三发送单元649设置为：发送删除承载列表信息至SeNB，其中，删除承载列表信息中携带有业务承载信息。
图10是根据本发明实施例的跨MeNB切换装置的可选结构示意图四，如图10所示，可选地，装置还包括：第一发送模块66，耦合至处理模块64，设置为至少发送合设L-GW的IP地址信息至MME。
可选地，第一发送模块66还设置为：发送合设L-GW的IP地址信息和/或用于指示合设L-GW设置位置的指示信息至MME。
可选地，指示信息包括以下之一：合设L-GW所在的SeNB的全局标志符、用于指示合设L-GW位于SeNB的指示符。
本发明实施例还提供了一种包括上述的跨MeNB切换装置的基站，。
本发明实施例还提供了一种跨MeNB切换装置，应用于目标MeNB。图11是根据本发明实施例的跨MeNB切换装置的结构示意图二，如图11所示，该装置包括：获取模块112和第二发送模块114，其中，获取模块112，设置为获取SeNB上合设L-GW的IP地址信息；第二发送模块114，耦合至获取模块112，设置为至少发送IP地址信息至MME；其中，UE在切换前接入源MeNB，UE在切换后通过双连接接入目标MeNB和SeNB，支持SIPTO/LIPA业务的合设L-GW设置在SeNB上。
可选地，获取模块112还设置为：接收源MeNB发送的切换请求，其中，切换请求中携带有IP地址信息；或者接收SeNB发送的SeNB添加请求确认消息，其中，SeNB添加请求确认消息中携带有IP地址信息。
可选地，第二发送模块114还设置为：发送IP地址信息和/或用于指示合设L-GW设置位 置的指示信息至MME。
可选地，指示信息包括以下之一：合设L-GW所在的SeNB的全局标志符、用于指示合设L-GW位于SeNB的指示符。
本发明实施例还提供了一种包括上述的跨MeNB切换装置的基站。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
为了使本发明实施例的描述更加清楚，下面结合可选实施例进行描述和说明。
本发明可选实施例提供了一种小基站环境下实现切换的方法，以有效地实现小基站环境切换场景下实现SIPTO@LN或LIPA@LN是本发明实施例需要解决的问题。
本发明可选实施例提供的一种小基站环境下实现切换的方法，分别对单连接切换为双连接、以及双连接切换为双连接的两个场景下的SIPTO/LIPA业务处理进行了优化。
在单连接切换为双连接的场景下，即：UE在切换前连接的基站称为切换源基站，UE在切换后和切换目标MeNB以及SeNB实现双连接。其中SIPTO/LIPA@LN的合设L-GW在SeNB上。
在切换过程中，目标MeNB获取SeNB上合设L-GW的IP地址信息。目标MeNB可以通过源基站发送的切换请求消息获取，也可以通过SeNB和目标MeNB之间的SeNB添加请求确认消息获取。
目标MeNB可选通过路径切换请求消息将SeNB上合设L-GW的IP地址信息发送给MME。
可选地，可以同时包括L-GW位于MeNB还是SeNB的指示信息，可以采用以下一种或多种表示形式：L-GW所在SeNB的全局标志符，L-GW位于SeNB指示符。
在切换完成后，用户可以在SeNB上建立SIPTO/LIPA@LN业务。
在双连接切换为双连接的场景下，即：UE在切换前为双连接，连接切换源MeNB和SeNB，UE在切换后双连接接入到切换目标MeNB和SeNB，其中SeNB保持不变。其中SIPTO/LIPA@LN的合设L-GW在SeNB上。
如果切换前在SeNB上已经建立SIPTO/LIPA业务，那么在切换过程中可以保持该SIPTO/LIPA业务、或者释放SIPTO/LIPA业务。
A)SIPTO业务保持不变
目标MeNB获取UE在切换源侧的SIPTO/LIPA业务承载信息。可以通过源MeNB在切换请求消息中将SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)发送到目标MeNB；
目标MeNB若决定保持SIPTO业务不变，则需要在和SeNB握手流程中携带SIPTO/LIPA承载信息，例如：演进的无线接入承载标识(Evolved Radio Access Bearer ID，简称为ERAB ID)、相关性标识(Correlation ID)和L-GW地址信息，比如在SeNB添加请求或者SeNB修改请求消息中携带。
目标MeNB通过路径切换请求消息将SeNB上保持不变的SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)信息发送给MME。
可选地，切换目标MeNB可选将SeNB上合设L-GW的IP地址信息发送给MME，或者可选同时包括L-GW位于MeNB还是SeNB的指示信息，可以采用以下一种或多种表示形式：L-GW所在SeNB的全局标志符，L-GW位于SeNB指示符。
切换流程完成后，当SeNB接收到UE文本释放消息的时候，SeNB不应该释放SIPTO/LIPA承载。
B)SIPTO业务释放
目标MeNB获取UE在切换源侧的SIPTO/LIPA业务承载信息。可以通过源MeNB在切换请求消息中将SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)发送到目标MeNB；
若目标MeNB若决定释放SIPTO/LIPA业务，则需要在和SeNB握手流程中通知SeNB，比如SIPTO/LIPA承载信息在删除承载列表中存在。SeNB释放本地SIPTO/LIPA业务。SeNB可以在握手流程中、或者在收到SeNB释放消息、或者在切换流程完成后收到UE文本释放消息后本地释放SIPTO/LIPA业务。
目标MeNB可选通过路径切换请求消息将SeNB上合设L-GW的IP地址信息发送给MME。
可选地，可以同时包括L-GW位于MeNB还是SeNB的指示信息，可以采用以下一种或多种表示形式：L-GW所在SeNB的全局标志符，L-GW位于SeNB指示符。
需要指出的是，本发明专利不限于LTE系统，第三代通信系统(3G系统)也同样适用。
下面通过可选实例对上述切换场景分别进行说明。
可选实施例1
如图12，采用本发明可选实施例的方法，步骤如下：
场景1：单变双切换场景，合设L-GW在SeNB，切换前UE为单连接，切换后UE实现双连接并在SeNB上建立SIPTO/LIPA承载。
步骤1：源MeNB(S-MeNB)发送X2切换请求消息给目标MeNB(T-MeNB)。其中可选包括SeNB上合设L-GW的IP地址信息，源MeNB可以通过X2接口流程获取SeNB上合设L-GW的IP地址信息。可选地，可选包括该L-GW在MeNB还是SeNB的指示信息。
步骤2：T-MeNB根据X2切换请求消息中的双连接指示信息，T-MeNB发送SeNB添加请求消息给SeNB。
步骤3：SeNB回复SeNB添加请求确认消息给T-MeNB。其中可选包括SeNB上合设L-GW的IP地址信息。
步骤4：T-MeNB回复X2切换请求确认消息给S-MeNB。
步骤5～8：UE空口同步并接入到T-MeNB和SeNB。
步骤9：T-MeNB发送SeNB重配完成消息给SeNB。
步骤10～11：T-MeNB发送序列号(Sequence Number，简称为SN)状态传输消息给SeNB以及开始数据转发。
步骤12～14：T-MeNB发送路径转换请求消息到MME来通知新的下行路径(从S-MeNB->T-MeNB)。路径切换请求消息中可选包括SeNB上合设L-GW的IP地址信息，可选地，可选包括该L-GW在MeNB还是SeNB的指示信息。核心网可以根据MeNB上报的合设L-GW地址信息用于后续的SIPTO/LIPA@LN业务建立。
步骤15：MME回复路径转换请求确认消息到T-MeNB。
步骤16：T-MeNB发送UE上下文释放消息给S-MeNB来触发释放S-MeNB中的资源。
可选实施例2
如图13，采用本发明可选实施例的方法，步骤如下：
场景2：双变双切换场景，UE在切换前为双连接，连接切换源MeNB和SeNB，UE在切换后双连接接入到切换目标MeNB和SeNB，其中SeNB保持不变。其中SIPTO/LIPA@LN的合设L-GW在SeNB上。SIPTO/LIPA业务切换前后保持不变。
步骤1：S-MeNB发送X2切换请求消息给T-MeNB。其中包括SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)。
步骤2：T-MeNB根据X2切换请求消息中的双连接指示信息，T-MeNB发送SeNB添加请求消息给SeNB。目标MeNB若决定保持SIPTO/LIPA业务不变，则SeNB添加请求消息中包括SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)。
步骤3：SeNB回复SeNB添加请求确认消息给T-MeNB。
步骤4：T-MeNB回复X2切换请求确认消息给S-MeNB。
步骤5：S-MeNB发送SeNB释放消息给SeNB,，SeNB停止给UE下发数据。
步骤6～9：UE实现空口同步并接入到T-MeNB和SeNB。
步骤10：T-MeNB发送SeNB重配完成消息给SeNB。
步骤11～12：T-MeNB发送SN状态传输消息给SeNB以及开始数据转发。
步骤13～15：T-MeNB发送路径转换请求消息到MME来通知新的下行路径(从S-MeNB->T-MeNB)。目标MeNB通过路径切换请求消息将SeNB上保持不变的SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)信息发送给MME。可选地，切换目标MeNB可选将SeNB上合设L-GW的IP地址信息发送给MME，或者可选同时包括L-GW位于MeNB还是SeNB的指示信息，可以采用以下一种或多种表示形式：L-GW所在SeNB的全局标志符，L-GW位于SeNB指示符。核心网可以根据MeNB上报的合设L-GW地址信息用于后续的SIPTO/LIPA@LN业务建立。
步骤16：MME回复路径转换请求确认消息到T-MeNB。
步骤17：T-MeNB发送UE上下文释放消息给S-MeNB来触发释放S-MeNB中的资源。
步骤18：S-MeNB可选发送UE上下文释放消息给SeNB。此时SeNB只释放UE和S-MeNB相关的本地资源，切换后保留的在SeNB上的业务并不释放，其中包括SIPTO/LIPA业务。
可选实施例3
如图14，采用本发明可选实施例的方法，步骤如下：
场景3：双变双切换场景，UE在切换前为双连接，连接切换源MeNB和SeNB，UE在切换后双连接接入到切换目标MeNB和SeNB，其中SeNB保持不变。其中SIPTO/LIPA@LN的合设L-GW在SeNB上。SIPTO/LIPA业务切换后释放。
步骤1：S-MeNB发送X2切换请求消息给T-MeNB。其中包括SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)。
步骤2：T-MeNB根据X2切换请求消息中的双连接指示信息，T-MeNB发送SeNB添加请求消息给SeNB。目标MeNB若决定释放SIPTO/LIPA业务，则SeNB添加请求消息中包括需释放的SIPTO/LIPA承载信息。
步骤3：SeNB回复SeNB添加请求确认消息给T-MeNB。
步骤4：T-MeNB回复X2切换请求确认消息给S-MeNB。
步骤5：S-MeNB发送SeNB释放消息给SeNB,，SeNB停止给UE下发数据。
步骤6～9：UE实现空口同步并接入到T-MeNB和SeNB。
步骤10：T-MeNB发送SeNB重配完成消息给SeNB。
步骤11～12：T-MeNB发送SN状态传输消息给SeNB以及开始数据转发。
步骤13～15：T-MeNB发送路径转换请求消息到MME来通知新的下行路径(从S-MeNB->T-MeNB)。目标MeNB通过路径切换请求消息将SeNB上需要释放的SIPTO/LIPA承载信息(例如，ERAB ID、Correlation ID和L-GW地址信息)信息发送给MME。可选地， 切换目标MeNB可选将SeNB上合设L-GW的IP地址信息发送给MME，或者可选同时包括L-GW位于MeNB还是SeNB的指示信息，可以采用以下一种或多种表示形式：L-GW所在SeNB的全局标志符，L-GW位于SeNB指示符。核心网可以根据MeNB上报的合设L-GW地址信息用于后续的SIPTO/LIPA@LN业务建立。
步骤16：MME回复路径转换请求确认消息到T-MeNB。
步骤17：T-MeNB发送UE上下文释放消息给S-MeNB来触发释放S-MeNB中的资源。
步骤18：S-MeNB可选发送UE上下文释放消息给SeNB。
其中SeNB可以在和目标MeNB的握手流程中、或者在收到SeNB释放消息、或者在切换流程完成后收到UE文本释放消息后本地释放SIPTO/LIPA业务。
可选地，也可以由SeNB判断是否释放SIPTO/LIPA业务。
综上所述，通过本发明的上述实施例和可选实施例，提供了一种小基站环境下实现切换的方法，上述方法能够在复杂的小基站环境下，针对双连接业务特性，在切换流程中如何有效实现SIPTO@LN、LIPA@LN功能，有利于提高网络性能。
在另外一个实施例中，还提供了一种软件，该软件用于执行上述实施例及可选实施方式中描述的技术方案。
在另外一个实施例中，还提供了一种存储介质，该存储介质中存储有上述软件，该存储介质包括但不限于：光盘、软盘、硬盘、可擦写存储器等。
工业实用性：通过上述描述可知，本发明采用目标MeNB确定切换前UE已经在SeNB上建立SIPTO/LIPA业务；目标MeNB保持或者释放SIPTO/LIPA业务；其中，UE在切换前通过双连接接入源MeNB和SeNB，UE在切换后通过双连接接入目标MeNB和SeNB，支持SIPTO/LIPA业务的合设L-GW设置在SeNB上的方式，解决了相关技术中跨MeNB切换过程中尚未考虑SIPTO/LIPA业务的处理的问题，从而提供了跨MeNB切换过程中的SIPTO/LIPA业务处理方法。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的对象在适当情况下可以互换，以便这里描述的本发明的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置 中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的可选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (36)

  1. 一种跨主基站MeNB切换方法，包括：
    目标MeNB确定切换前用户终端UE已经在从基站SeNB上建立选定的因特网协议流量卸载SIPTO/本地因特网协议接入LIPA业务；
    所述目标MeNB保持或者释放所述SIPTO/LIPA业务；
    其中，所述UE在切换前通过双连接接入源MeNB和所述SeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持所述SIPTO/LIPA业务的合设本地网关L-GW设置在所述SeNB上。
  2. 根据权利要求1所述的方法，其中，在所述目标MeNB确定保持所述SIPTO/LIPA业务的情况下，所述目标MeNB保持所述SIPTO/LIPA业务包括：
    所述目标MeNB获取所述SIPTO/LIPA业务的业务承载信息；
    所述目标MeNB将所述业务承载信息发送给移动管理实体MME。
  3. 根据权利要求2所述的方法，其中，在所述目标MeNB确定保持所述SIPTO/LIPA业务的情况下，所述目标MeNB保持所述SIPTO/LIPA业务还包括：
    所述目标MeNB将所述业务承载信息发送给所述SeNB。
  4. 根据权利要求2所述的方法，其中，所述业务承载信息包括以下至少之一：
    演进的无线接入承载标识ERAB ID、相关性标识Correlation ID、L-GW地址信息。
  5. 根据权利要求2所述的方法，其中，所述目标MeNB获取所述SIPTO/LIPA业务的业务承载信息包括：
    所述目标MeNB接收来自所述源MeNB的切换请求，其中，所述切换请求中携带有所述业务承载信息。
  6. 根据权利要求3所述的方法，其中，所述目标MeNB将所述业务承载信息发送给所述SeNB包括：
    所述目标MeNB发送SeNB添加请求或者SeNB修改请求至所述SeNB，其中，所述SeNB添加请求或者所述SeNB修改请求中携带有所述业务承载信息。
  7. 根据权利要求2所述的方法，其中，所述目标MeNB将所述业务承载信息发送给MME包括：
    所述目标MeNB发送路径切换请求至所述MME，其中，所述路径切换请求中携带有所述业务承载信息。
  8. 根据权利要求1所述的方法，其中，在所述目标MeNB确定保持所述SIPTO/LIPA业务的情况下，所述目标MeNB保持所述SIPTO/LIPA业务还包括：
    所述SeNB接收UE上下文释放消息；
    所述SeNB不释放所述SIPTO/LIPA业务。
  9. 根据权利要求1所述的方法，其中，在所述目标MeNB确定释放所述SIPTO/LIPA业务的情况下，所述目标MeNB释放所述SIPTO/LIPA业务包括：
    所述目标MeNB获取所述SIPTO/LIPA业务的业务承载信息；
    所述目标MeNB将所述业务承载信息发送给所述SeNB，以指示所述SeNB释放所述SIPTO/LIPA业务。
  10. 根据权利要求9所述的方法，其中，所述目标MeNB将所述业务承载信息发送给所述SeNB包括：
    所述目标MeNB发送删除承载列表信息至所述SeNB，其中，所述删除承载列表信息中携带有所述业务承载信息。
  11. 根据权利要求1所述的方法，其中，在所述目标MeNB确定释放所述SIPTO/LIPA业务的情况下，所述目标MeNB释放所述SIPTO/LIPA业务还包括：
    所述SeNB接收删除承载列表信息/SeNB释放消息/UE文本释放消息；
    所述SeNB根据所述删除承载列表信息/所述SeNB释放消息/所述UE文本释放消息，释放所述SIPTO/LIPA业务。
  12. 根据权利要求1所述的方法，其中，在所述目标MeNB保持或者释放所述SIPTO/LIPA业务之后，所述方法还包括：
    所述目标MeNB至少发送所述合设L-GW的IP地址信息至MME。
  13. 根据权利要求12所述的方法，其中，所述目标MeNB至少发送所述合设L-GW的IP地址信息至MME包括：
    所述目标MeNB发送所述合设L-GW的IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
  14. 根据权利要求13所述的方法，其中，所述指示信息包括以下之一：
    所述合设L-GW所在的SeNB的全局标志符、用于指示所述合设L-GW位于SeNB的指示符。
  15. 一种跨主基站MeNB切换方法，包括：
    目标MeNB获取从基站SeNB上合设本地网关L-GW的因特网协议IP地址信息；
    所述目标MeNB至少发送所述IP地址信息至移动管理实体MME；
    其中，UE在切换前接入源MeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持选定的因特网协议流量卸载SIPTO/本地因特网协议接入LIPA业务的所述合设L-GW设置在所述SeNB上。
  16. 根据权利要求15所述的方法，其中，目标MeNB获取SeNB上合设L-GW的IP地址信息包括：
    所述目标MeNB接收所述源MeNB发送的切换请求，其中，所述切换请求中携带有所述IP地址信息；或者
    所述目标MeNB接收SeNB发送的SeNB添加请求确认消息，其中，所述SeNB添加请求确认消息中携带有所述IP地址信息。
  17. 根据权利要求15所述的方法，其中，所述目标MeNB至少发送所述IP地址信息至MME包括：
    所述目标MeNB发送所述IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
  18. 根据权利要求17所述的方法，其中，所述指示信息包括以下之一：
    所述合设L-GW所在的SeNB的全局标志符、用于指示所述合设L-GW位于SeNB的指示符。
  19. 一种跨MeNB切换装置，应用于目标MeNB，包括：
    确定模块，设置为确定切换前UE已经在SeNB上建立SIPTO/LIPA业务；
    处理模块，设置为保持或者释放所述SIPTO/LIPA业务；
    其中，所述UE在切换前通过双连接接入源MeNB和所述SeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持所述SIPTO/LIPA业务的合设L-GW设置在所述SeNB上。
  20. 根据权利要求19所述的装置，其中，所述处理模块包括：
    第一获取单元，设置为获取所述SIPTO/LIPA业务的业务承载信息；
    第一发送单元，设置为将所述业务承载信息发送给MME。
  21. 根据权利要求20所述的装置，其中，所述处理模块还包括：
    第二发送单元，设置为将所述业务承载信息发送给所述SeNB。
  22. 根据权利要求20所述的装置，其中，所述业务承载信息包括以下至少之一：
    ERAB ID、Correlation ID、L-GW地址信息。
  23. 根据权利要求20所述的装置，其中，所述第一获取单元设置为：
    接收来自所述源MeNB的切换请求，其中，所述切换请求中携带有所述业务承载信息。
  24. 根据权利要求21所述的装置，其中，所述第二发送单元设置为：
    发送SeNB添加请求或者SeNB修改请求至所述SeNB，其中，所述SeNB添加请求或者所述SeNB修改请求中携带有所述业务承载信息。
  25. 根据权利要求20所述的装置，其中，所述第一发送单元设置为：
    发送路径切换请求至所述MME，其中，所述路径切换请求中携带有所述业务承载信息。
  26. 根据权利要求19所述的装置，其中，所述处理模块还包括：
    第二获取单元，设置为获取所述SIPTO/LIPA业务的业务承载信息；
    第三发送单元，设置为将所述业务承载信息发送给所述SeNB，以指示所述SeNB释放所述SIPTO/LIPA业务。
  27. 根据权利要求26所述的装置，其中，所述第三发送单元设置为：
    发送删除承载列表信息至所述SeNB，其中，所述删除承载列表信息中携带有所述业务承载信息。
  28. 根据权利要求19所述的装置，其中，所述装置还包括：
    第一发送模块，设置为至少发送所述合设L-GW的IP地址信息至MME。
  29. 根据权利要求28所述的装置，其中，所述第一发送模块还设置为：
    发送所述合设L-GW的IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
  30. 根据权利要求29所述的装置，其中，所述指示信息包括以下之一：
    所述合设L-GW所在的SeNB的全局标志符、用于指示所述合设L-GW位于SeNB的指示符。
  31. 一种基站，包括：如权利要求19至30中任一项所述的跨MeNB切换装置。
  32. 一种跨MeNB切换装置，应用于目标MeNB，包括：
    获取模块，设置为获取SeNB上合设L-GW的IP地址信息；
    第二发送模块，设置为至少发送所述IP地址信息至MME；
    其中，所述UE在切换前接入源MeNB，所述UE在切换后通过双连接接入所述目标MeNB和所述SeNB，支持SIPTO/LIPA业务的所述合设L-GW设置在所述SeNB上。
  33. 根据权利要求32所述的装置，其中，获取模块还设置为：
    接收所述源MeNB发送的切换请求，其中，所述切换请求中携带有所述IP地址信息；或者
    接收SeNB发送的SeNB添加请求确认消息，其中，所述SeNB添加请求确认消息中携带有所述IP地址信息。
  34. 根据权利要求32所述的装置，其中，所述第二发送模块还设置为：
    发送所述IP地址信息和/或用于指示所述合设L-GW设置位置的指示信息至所述MME。
  35. 根据权利要求34所述的装置，其中，所述指示信息包括以下之一：
    所述合设L-GW所在的SeNB的全局标志符、用于指示所述合设L-GW位于SeNB的指示符。
  36. 一种基站，包括：如权利要求32至35中任一项所述的跨MeNB切换装置。
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