WO2018014154A1 - 一种rrc连接重建方法和装置 - Google Patents

一种rrc连接重建方法和装置 Download PDF

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Publication number
WO2018014154A1
WO2018014154A1 PCT/CN2016/090284 CN2016090284W WO2018014154A1 WO 2018014154 A1 WO2018014154 A1 WO 2018014154A1 CN 2016090284 W CN2016090284 W CN 2016090284W WO 2018014154 A1 WO2018014154 A1 WO 2018014154A1
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WO
WIPO (PCT)
Prior art keywords
base station
mme
context
mobile terminal
message
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PCT/CN2016/090284
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English (en)
French (fr)
Inventor
杨勇
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/090284 priority Critical patent/WO2018014154A1/zh
Priority to CN201680087340.XA priority patent/CN109417738A/zh
Publication of WO2018014154A1 publication Critical patent/WO2018014154A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the present invention relates to the field of communications, and in particular, to an RRC connection re-establishment method and apparatus.
  • the Radio Resource Control is an application layer protocol between a User Equipment (UE) and an Evolved Universal Terrestrial Radio Access Network (UTRAN). Handling signaling and data between the UE and the UTRAN.
  • UE User Equipment
  • UTRAN Evolved Universal Terrestrial Radio Access Network
  • RRC Radio Resource Control
  • the RRC connection between the UE and the source eNB may fail.
  • RLF Radio Link Failure
  • the communication system can switch the UE to another cell by switching the base station and establishing an RRC connection between the UE and the target base station to ensure communication quality.
  • the RRC connection of the UE to the target base station can be reestablished after the target base station needs to acquire the context information of the UE from the source base station after the UE's context (eg, the terminal network capability, the source base station identifier, and the like) is stored in the source base station.
  • the source base station and the target base station are generally configured with an X2 link, and the target base station can acquire the context of the mobile terminal from the source base station through the X2 link, and the process is as follows:
  • the UE When the radio link between the UE and the source base station is abnormal, the UE initiates an RRC connection reestablishment request to the target base station, and the target base station sends an RLF indication to the source base station, and the source base station sends a handover request to the target base station through the X2 link, the handover request.
  • the UE carries the context of the UE, and the target base station allocates the air interface resource and the service bearer resource to the UE according to the context.
  • the present invention provides an RRC connection re-establishment method and apparatus, which can solve the problem that the target base station cannot acquire the mobile terminal from the source base station under the condition that there is no X2 link between the target base station and the source base station.
  • the following problem improves the success rate of RRC connection reestablishment.
  • a first aspect of the present invention provides an RRC connection reestablishment method, including: receiving, by a target base station, an RRC connection reestablishment request sent by a mobile terminal, and then transmitting a base station configuration transmission message to the MME according to the RRC connection reestablishment request, where the MME transmits the message according to the base station configuration.
  • the generated MME configuration transmission message is sent to the source base station.
  • the target base station After receiving the handover request sent by the MME, the target base station sends an RRC connection reestablishment message to the mobile terminal according to the context of the mobile terminal to establish an RRC connection between the target base station and the mobile terminal.
  • the base station configuration transmission message and the MME configuration transmission message respectively carry parameters for acquiring the context of the mobile terminal, and the parameters of the context of the mobile terminal are used to acquire the context of the mobile terminal from the source base station, and the handover request carries the context of the mobile terminal.
  • the parameter for obtaining the context of the mobile terminal carried in the transmission message may reach the source base station through one or more MMEs, and the source base station may send the context of the mobile terminal to the target via the MME according to the parameter of the context of acquiring the mobile terminal.
  • Base station It can be seen that the present invention solves the problem that the target base station cannot obtain the context of the mobile terminal from the source base station under the condition that there is no X2 link between the target base station and the source base station.
  • the parameter for acquiring the context of the mobile terminal includes at least: a target base station identifier, a cell identifier of the target cell, a request context identifier, a physical cell identifier of the source cell, and a cell radio network temporary identifier of the source cell.
  • the target cell belongs to the target base station, and the source cell belongs to the source base station.
  • the target base station may send a handover request acknowledgement message to the MME according to the handover request, so that the MME sends a handover command to the source base station; and the target base station receives the MME transmission.
  • the service data units in the target base station are arranged according to the sequence number in the status transmission message, and the target base station may further receive the RRC connection reestablishment completion message sent by the mobile terminal.
  • the handover command is used to indicate that the source base station performs the S1 link handover with the target base station, and the status transmission message is obtained by the MME from the source base station.
  • the target base station may further arrange the service data units sent by the mobile terminal according to the above sequence number in a correct manner.
  • the target base station after the target base station receives the RRC connection reestablishment complete message sent by the mobile terminal, the target base station sends a handover complete notification to the MME, so that the MME sends the release context indication to the source base station, and the release context indication is used to indicate The source base station clears the context of the mobile terminal.
  • the source base station may clear the context of the mobile terminal to save network resources and storage resources of the source base station.
  • the RRC connection reestablishment request carries the physical cell identifier of the active cell and the cell radio network temporary identifier of the source cell.
  • a second aspect of the present invention provides an RRC connection re-establishment method, including: receiving, by an MME, a base station configuration transmission message sent by a target base station, and then generating an MME configuration transmission message according to the base station configuration transmission message, and then transmitting the MME configuration transmission message to the source base station; After receiving the required handover message sent by the source base station, the handover request is sent to the target base station according to the required handover message, so that the target base station sends an RRC connection reestablishment message to the mobile terminal according to the context of the mobile terminal.
  • the base station configuration transmission message carries a parameter for acquiring a context of the mobile terminal, and the parameter for acquiring the context of the mobile terminal is used to acquire the context of the mobile terminal from the source base station, and the handover message and the handover request respectively carry the context of the mobile terminal.
  • the MME may send the parameter of the context of the mobile terminal that is carried in the configuration transmission message to the source base station, and the source base station may send the context of the mobile terminal to the target base station according to the parameter of acquiring the context of the mobile terminal. It can be seen that the present invention solves the problem that the target base station cannot obtain the context of the mobile terminal from the source base station under the condition that there is no X2 link between the target base station and the source base station.
  • the MME receives the handover request acknowledgement message sent by the target base station, and then sends a handover command to the source base station according to the handover request acknowledgement message; the MME receives the source base station and sends the handover request.
  • the status transmission message is sent to the target base station, so that the target base station arranges the service data units in the target base station according to the sequence number in the status transmission message.
  • the handover command is used to indicate that the source base station performs the S1 link handover with the target base station.
  • the MME may also transmit a status transmission message, so that the target base station arranges the service data units sent by the mobile terminal in the correct manner according to the sequence number.
  • the MME after receiving the handover completion notification sent by the target base station, the MME sends the release context indication to the source base station according to the handover completion notification, where the release context indication is used to indicate that the source base station clears the context of the mobile terminal.
  • the MME may send a release context indication to the source base station, so that the source base station clears the context of the mobile terminal to save network resources and storage resources of the source base station.
  • a third aspect of the present invention provides an RRC connection re-establishment method, including: receiving, by a source base station, an MME configuration transmission message sent by a mobility management entity MME, where the MME configuration transmission message carries an acquisition a parameter of a context of the mobile terminal, a parameter for acquiring a context of the mobile terminal, for acquiring a context of the mobile terminal from the source base station, where the MME configuration transmission message is generated by the MME according to the base station configuration transmission message sent by the target base station; and the source base station is configured according to acquiring the mobile terminal
  • the context parameter is used to obtain the context of the mobile terminal.
  • the source base station sends a handover request message to the MME, so that the MME sends a handover message to the target base station according to the required handover message, and the handover message and the handover message respectively carry the context of the mobile terminal.
  • the source base station may identify the parameter of the target base station that obtains the context of the mobile terminal sent by the MME, and send the context of the mobile terminal to the target base station according to the parameter of acquiring the context of the mobile terminal, so that the target base station establishes with the mobile terminal. RRC connection. It can be seen that the present invention solves the problem that the target base station cannot obtain the context of the mobile terminal from the source base station under the condition that the target base station and the source base station have no X2 link.
  • the source base station receives the handover command sent by the MME, and then sends the state transmission information to the MME according to the handover command, so that the MME sends the state transmission information to the target base station.
  • the handover command is used to indicate that the source base station performs the S1 link handover with the target base station, and the sequence number of the status transmission message is used to sort the service data units in the target base station.
  • the source base station may send the status transmission message to the target base station via the MME, so that the target base station arranges the service data units sent by the mobile terminal in the correct manner according to the foregoing sequence number.
  • the source base station after the source base station sends the required handover message to the MME, the source base station receives the release context indication sent by the MME, and then clears the context of the mobile terminal according to the release context indication.
  • the release context indication is used to indicate that the source base station clears the context of the mobile terminal. According to this implementation manner, the source base station can clear the context of the mobile terminal to save network resources and storage resources of the source base station.
  • a fourth aspect provides a base station having a function of implementing the behavior of a target base station in the first aspect described above.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the fifth aspect provides an MME, where the MME has a function of implementing the MME behavior in the foregoing second aspect.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • a sixth aspect provides a base station having a function of implementing the behavior of a source base station in the above third aspect.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • Hardware or The software includes one or more modules corresponding to the functions described above.
  • the target base station may send a configuration transmission message for acquiring the context of the mobile terminal from the source base station according to the RRC connection reestablishment request from the mobile terminal, and the configuration transmission message arrives through at least one MME.
  • the source base station, the source base station transparently transmits the context of the mobile terminal to the target base station via the MME according to the configuration transmission message, and the target base station establishes an RRC connection with the mobile terminal according to the context of the mobile terminal.
  • the configuration transmission message can reach the source base station from the target base station through different MMEs, so the target base station can acquire the context of the mobile terminal from the source base station, and then reconstruct the RRC connection according to the context of the mobile terminal, and the present invention
  • the problem that the target base station cannot obtain the context of the mobile terminal from the source base station under the condition that the target base station and the source base station have no X2 link is solved, and the success rate of the RRC connection reestablishment is improved.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic signaling diagram of an X2 link switching method in the prior art
  • FIG. 3 is a schematic signaling diagram of an RRC connection reestablishment method according to an embodiment of the present invention.
  • FIG. 4 is a schematic signaling diagram of an RRC connection reestablishment method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a target base station according to an embodiment of the present invention.
  • FIG. 6 is another schematic structural diagram of a target base station according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an MME according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a source base station according to an embodiment of the present invention.
  • FIG. 9 is another schematic structural diagram of a source base station according to an embodiment of the present invention.
  • FIG. 10 is another schematic structural diagram of a target base station according to an embodiment of the present invention.
  • FIG. 11 is another schematic structural diagram of an MME according to an embodiment of the present invention.
  • FIG. 12 is another schematic structural diagram of a source base station according to an embodiment of the present invention.
  • FIG. 1 Please refer to FIG. 1:
  • an eNB and an Evolved Packer Core Network (EPC) are connected through an S1 link.
  • LTE Long Term Evolution
  • EPC Evolved Packer Core Network
  • the EPC includes a Mobility Management Entity (MME) and a System Architecture Evolution Gateway (SAE GateWay, SGW for short).
  • MME Mobility Management Entity
  • SAE GateWay SGW for short.
  • MME acts as the control plane part and is responsible for the mobility management of the control plane, including user context and mobility state management, assigning user temporary identity, and the like.
  • SGW is responsible for initiating paging for downlink data in idle state, and managing and storing Internet Protocol (IP) bearer parameters and intra-network routing information.
  • IP Internet Protocol
  • a base station refers to a device that communicates with a wireless terminal over one or more cells on the air interface of the access network.
  • the base station can be used to convert the received air frame with an Inter-Network Protocol (IP) packet as a router between the wireless terminal and the rest of the access network, wherein the rest of the access network can include an IP network.
  • IP Inter-Network Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNBB or eNB for short) in LTE or The e-NodeB), or an evolved base station of the LTE subsequent evolution system, is not limited by the present invention.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNBB or eNB for short in LTE or The e-NodeB
  • the e-NodeB evolved base station of the LTE subsequent evolution system
  • a terminal refers to a device that provides voice and/or data connectivity to a user, including a wireless terminal or a wired terminal.
  • the wireless terminal may be a handheld device having a wireless connection function, or another processing device connected to the wireless modem, and a mobile terminal that communicates with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the wireless terminal can be a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the wireless terminal can also be a personal communication service (PCS) phone, a cordless phone, a Session Initiated Protocol (SIP) phone, or a Wireless Local Loop (WLL) station. , Personal Digital Assistant (PDA) and other devices.
  • PCS personal communication service
  • SIP Session Initiated Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the wireless terminal may also be referred to as a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, and a remote station. (Remote Station), Access Point, Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment (UE).
  • UE User Equipment
  • the eNB and the MME implement the transmission of control plane signaling between the eNB and the MME through a proxy function of the S1 interface.
  • the proxy function between the eNB and the SGW is implemented by the proxy function of the S1 interface to implement user plane signaling between the eNB and the SGW.
  • the eNB to the eNB is configured with an X2 link
  • the eNBs can also transmit signaling and data through the X2 link. Signaling and data are transmitted between the eNB and the terminal over an RRC connection.
  • the process of acquiring the context of the mobile terminal through the X2 between the base stations is as follows:
  • Step 201 When an abnormality occurs in a radio link between the UE and the source base station, the UE initiates an RRC Reestablishment Request to the target base station.
  • Step 202 The target base station sends a radio link failure indication (RLF Indication) to the source base station.
  • RLF Indication radio link failure indication
  • Step 203 The source base station sends a handover request (Handover Request) to the target base station, where the handover request carries a context (UE Context).
  • Handover Request a handover request
  • UE Context a context
  • Step 204 If the target base station is capable of allocating air interface resources and service bearer resources to the UE, the target base station sends a handover request acknowledgement message (Handover Request ACK) to the source base station.
  • Handover Request ACK handover request acknowledgement message
  • Step 205 The target base station sends an RRC Reestablishment Setup message to the UE to indicate that the handover starts.
  • the target base station may allocate air interface resources and service bearer resources to the UE according to the context.
  • Step 206 The source base station sends an eNB Status Transfer (eNB Status Transfer) to the target base station in response to the handover request acknowledgement message.
  • the status transmission message carries a sequence number of a Service Data Unit (SDU), and the sequence number is used for uplink synchronization between the UE and the target base station.
  • SDU Service Data Unit
  • the RRC connection establishment between the UE and the target base station is completed.
  • Step 207 After the UE accesses the target base station, the UE sends an RRC Connection Reestablishment Complete message to the target base station to indicate that the UE has switched to the target base station.
  • Step 208 After the handover is completed, the target base station sends a release context message (UE Context Release) to the source base station.
  • UE Context Release UE Context Release
  • an X2 link needs to be set between the target base station and the source base station, and the target base station and the source base station are connected to communicate with the same MME.
  • the target base station In the case that there is no X2 link between the target base station and the source base station, when the radio link between the UE and the source base station is abnormal, the target base station cannot acquire the context of the mobile terminal from the source base station through the X2 link, thereby causing the UE to The RRC connection reestablishment with the target base station fails, causing dropped calls.
  • the present invention provides an RRC connection reestablishment method to improve the RRC connection reestablishment success rate.
  • the source base station and the target base station may be connected to the same MME or may be connected to different MMEs. The following describes the RRC connection re-establishment method in the above two scenarios:
  • the source base station and the target base station are connected to the same MME:
  • an embodiment of the RRC connection reestablishment method provided by the present invention includes:
  • Step 301 The target base station receives an RRC connection reestablishment request sent by the mobile terminal.
  • the mobile terminal when the mobile terminal and the source base station generate RLF, the mobile terminal sends an RRC connection reestablishment request to the target base station, where the RRC connection reestablishment request includes, but is not limited to, the following parameters: physical cell identity (Physical Cell Identity, PCI for short) of the source cell The Cell Radio Network Temporary Identifier (CRNTI) of the source cell.
  • physical Cell identity Physical Cell Identity, PCI for short
  • CRNTI Cell Radio Network Temporary Identifier
  • the RRC connection reestablishment request may also carry a terminal check code (ShortMAC-I).
  • Step 302 The target base station sends a base station configuration transmission message to the MME according to the RRC connection reestablishment request.
  • the target base station generates a base station configuration transmission message in response to the RRC connection reestablishment request.
  • the base station configuration transmission message carries a parameter for acquiring a context of the mobile terminal, and the parameter for acquiring the context of the mobile terminal includes at least the following information: a target base station identifier, a cell identifier of the target cell, a request context identifier, a PCI of the source cell, and a CRNTI of the source cell.
  • the target cell is a serving cell that performs RRC connection reestablishment by the mobile terminal, and belongs to the target base station; the source cell is a cell that the mobile terminal is located before the RLF occurs, and belongs to the target cell.
  • the target base station identifier and the cell identifier of the target cell are used to notify the source base station, reestablish the RRC connected base station with the mobile terminal, and reestablish the cell in which the RRC connection is located.
  • the request context identifier, the PCI of the source cell, and the CRNTI of the source cell are used to indicate that the source base station acquires the context of the mobile terminal.
  • the acquisition is performed.
  • the parameter of the context of the mobile terminal further includes a terminal check code, where the terminal check code is used by the base station to check the mobile terminal to prevent the illegal terminal from spoofing the legitimate terminal to access the base station.
  • the terminal check code may be a value calculated by encrypting a frequency point of a mobile terminal source cell and/or a PCI by using a key.
  • the base station configuration transmission message is a protocol-defined eNB Configuration transfer, which carries a Self-Optimizing Network Configuration Transfer (SON Configuration Transfer) cell.
  • SON Configuration Transfer Self-Optimizing Network Configuration Transfer
  • the value of each parameter can be as follows:
  • the Global eNB ID parameter in the Target eNB ID is set to the above target base station identity.
  • the role of the SON message is to acquire the context of the mobile terminal.
  • the names corresponding to the above parameter functions are only schematic and can be set to other names.
  • Step 303 The MME sends an MME configuration transmission message to the source base station.
  • the MME After receiving the eNB Configuration Transfer message sent by the target base station, the MME generates an MME Configuration Transfer message according to the eNB configuration transmission message, and sends the MME configuration transmission message to the source base station.
  • the MME configuration transmission message is the same as the value carried by the eNB configuration transmission message, and each MME can identify and forward the MME configuration transmission message.
  • the MME may send the parameter of the eNB configuration transmission message to obtain the context of the mobile terminal to the source base station in a transparent transmission manner.
  • Step 304 The source base station sends a handover request message (Handover Required) to the MME according to the parameter of acquiring the context of the mobile terminal.
  • a handover request message (Handover Required)
  • the source base station After obtaining the MME configuration transmission message, the source base station acquires the mobile terminal according to the The parameters of the text (request context identifier bit, PCI and CRNTI), find and acquire the context of the mobile terminal locally, and then determine the base station that receives the above-mentioned context according to the target base station identifier and the target cell identifier, and carry the context of the mobile terminal in the need to switch the message. In the middle, it is sent to the MME.
  • the parameters of the text (request context identifier bit, PCI and CRNTI)
  • Step 305 The MME sends a handover request to the target base station.
  • the MME After receiving the required handover message, the MME generates a handover request, and sends the handover request to the target base station.
  • the handover request carries the context of the mobile terminal.
  • Step 306 The target base station sends a handover request acknowledgement message to the MME in response to the handover request.
  • the target base station may send a handover request acknowledgement message to the MME.
  • the handover request acknowledgement message indicates that the target base station has the capability of allocating air interface resources and service bearer resources for the mobile terminal.
  • Step 307 The target base station sends an RRC connection reestablishment message to the mobile terminal.
  • the RRC Connection Reestablishment message is used to indicate that the handover process of the target base station and the source base station begins.
  • the mobile terminal may send signaling and a service data unit to the target base station in response to the RRC Connection Reestablishment message.
  • the target base station can also implement the function of acquiring the context from the source base station by using the S1 message that can be transparently transmitted by other MMEs, which is not limited herein.
  • the context of acquiring the mobile terminal may be carried in the MME configuration transmission message.
  • the target base station may acquire the context of the mobile terminal from the source base station, thereby establishing An RRC connection between the target base station and the mobile terminal.
  • the target base station obtains service data from the mobile terminal and the source base station, respectively.
  • the target base station may perform the following steps:
  • Step 308 The MME sends a handover command (Handover Command) to the source base station, where the handover command is used to indicate that the source base station performs the S1 link handover with the target base station.
  • Handover Command a handover command
  • Step 309 The source base station sends a status transfer message to the MME.
  • the source base station may send a status transmission message to the MME in response to the handover command sent by the MME.
  • the status transmission message includes a sequence number (Sequence Number, SN for short) of a Service Data Unit (SDU).
  • SDU Service Data Unit
  • Step 310 The MME sends a status transmission message to the target base station.
  • the target base station may sort the obtained service data units according to the sequence number in the status transmission message.
  • Step 311 The mobile terminal sends an RRC connection reestablishment complete message to the target base station.
  • the target base station may acquire the context of the mobile terminal from the source base station, thereby establishing an RRC connection between the target base station and the mobile terminal. Moreover, the target base station may obtain the sequence number of the service data unit from the source base station, and sort the service data, thereby completing the handover of the mobile terminal from the source cell to the target cell. Then, the mobile terminal can send an RRC Connection Reestablishment Complete message to the target base station.
  • the embodiment of the present invention solves the call drop phenomenon caused by the failure of the RRC connection reestablishment and improves the success rate of the call drop reconstruction.
  • steps 308 to 311 are not necessary steps of the RRC connection re-establishment method provided by the present invention, and may not be implemented in the actual application, which is not limited herein.
  • the RRC connection re-establishment method further includes:
  • the target base station sends a handover complete notification to the MME, so that the MME sends a release context indication to the source base station, and the release context indication is used to indicate that the source base station clears the context of the mobile terminal.
  • the RRC connection re-establishment method further includes:
  • step 302 is performed;
  • the RRC connection reestablishment request carries the PCI and the CRNTI
  • the target base station can determine the source base station for storing the context of the mobile terminal according to the PCI and the CRNTI.
  • the target base station checks whether there is an X2 link between the target base station and the source base station. If not, step 402 is performed. If yes, the target base station may send a radio link failure indication to the source base station, so that the target base station passes the X2 link to the source.
  • the base station transmits the context of the mobile terminal. It can be seen that the target base station can select the context of the mobile terminal through the X2 link in the actual application, and can also obtain the context of the mobile terminal through the S1 interface.
  • the implementation process has good flexibility.
  • the source base station and the target base station are connected to different MMEs:
  • another embodiment of the RRC connection reestablishment method provided by the present invention includes:
  • Step 401 The target base station receives an RRC connection reestablishment request sent by the mobile terminal.
  • Step 402 The target base station sends a base station configuration transmission message to the first MME in response to the RRC connection reestablishment request.
  • steps 401 to 402 are similar to steps 301 to 302 in the embodiment shown in FIG. 3, and details are not described herein again.
  • Step 403 The first MME sends an MME configuration transmission message to the second MME.
  • Step 404 The second MME sends an MME configuration transmission message to the source base station.
  • step 403 and step 404 the MME configures the transmission message to be a transparent transmission capability message specified by the communication protocol, so each MME or base station can identify and forward the message.
  • Step 405 The source base station sends a handover request message to the second MME according to the configuration transmission message.
  • the steps 404 to 405 are similar to the steps 303 to 304 in the embodiment shown in FIG. 3, and details are not described herein again.
  • Step 406 The second MME sends a handover request message to the first MME.
  • Step 407 The first MME sends a handover request to the target base station.
  • Step 408 The target base station sends a handover request acknowledgement message to the first MME in response to the handover request.
  • Step 409 The target base station sends an RRC connection reestablishment message to the mobile terminal.
  • Steps 407 to 409 are similar to steps 305 to 307 in the embodiment shown in FIG. 3, and details are not described herein again.
  • Step 410 The first MME sends a handover request acknowledgement message to the second MME.
  • Step 411 The second MME sends a handover command to the source base station, where the handover command is used to indicate that the source base station performs the S1 link handover with the target base station.
  • Step 412 The source base station sends a status transmission message to the second MME, where the status transmission message carries the context of the mobile terminal.
  • the steps 411 to 412 are similar to the steps 308 to 309 in the embodiment shown in FIG. 3, and details are not described herein again.
  • Step 413 The second MME sends a status transmission message to the first MME.
  • Step 414 The first MME sends a status transmission message to the target base station.
  • the target base station establishes an RRC connection of the target base station to the mobile terminal according to the status transmission message.
  • Step 415 The mobile terminal sends an RRC connection reestablishment complete message to the target base station.
  • Steps 414 to 415 are similar to steps 310 to 311 in the embodiment shown in FIG. 3, and details are not described herein again.
  • the first MME and the second MME may transparently transmit a configuration transmission message, a handover message, a handover request acknowledgement message, and a status transmission message, so that the target base station can acquire the context of the mobile terminal from the source base station, and according to the mobile terminal.
  • the context establishes an RRC connection between the target base station and the mobile terminal.
  • the configuration transmission message of the present invention can still be transmitted from the target base station to the source base station through each MME, so that the target base station can Obtain the context of the mobile terminal to complete the RRC re-establishment.
  • the embodiment of the present invention solves the call drop phenomenon caused by the failure of the RRC connection reestablishment across the MME, and improves the success rate of the call drop reconstruction.
  • the target base station and the source base station are respectively connected to different MMEs, if there is an X2 connection between the target base station and the source base station, the target base station cannot acquire the context of the mobile terminal from the source base station through the X2 link.
  • the MMEs connected to the target base station and the source base station are respectively manufactured by different vendors, and the MME corresponding to the target base station cannot identify the handover request from the source base station, and therefore the target base station cannot acquire the context of the UE from the source base station.
  • the base station configuration transmission message and the MME configuration transmission message in the embodiment of the present invention are protocol-defined transparent transmission messages, and different MMEs can identify and forward the information. Therefore, the embodiment of the present invention can be applied to the foregoing scenario, and the target base station cannot be solved in the above scenario. The problem of obtaining the context of the mobile terminal from the source base station.
  • the source base station is the base station A
  • the target base station is the base station B
  • the mobile terminal takes the mobile phone as an example
  • the mobile phone may send an RRC connection reestablishment request to the base station B, where the request carries the PCI, CRNTI, and ShortMAC-I;
  • the base station B may determine, according to the PCI and the CRNTI, that the base station that has a link abnormality with the mobile phone is the base station A, and the base station B may find whether the local station B is configured to the X2 link of the base station B to the base station A. If not, the base station B according to the RRC connection reestablishment request, The MME sends an eNB Configuration transfer, where the eNB Configuration Transfer carries the cell identity of the base station B, the identity of the base station B, the request context identifier, the PCI of the base station A, the CRNTI of the base station A, and the ShortMAC-I;
  • the MME Configuration transfer is generated, and the MME Configuration transfer and the eNB Configuration Transfer carry the same parameters, and then the MME Configuration transfer is sent to the base station A according to the PCI of the base station A and the CRNTI of the base station A.
  • the base station A first determines whether the terminal that acquires the UE context is a valid user according to the ShortMAC-I. If yes, the UE Context is obtained locally according to the request context identifier in the MME Configuration transfer, and then sent to the base station B by the MME to initiate a handover request.
  • the base station B After acquiring the UE Context, the base station B sends an RRC connection reestablishment message to the mobile phone according to the UE Context to establish an RRC connection. After acquiring the UE Context, the base station B may also send an ACK frame to the MME to indicate that the air interface resource and the service bearer resource may be allocated to the mobile phone. After receiving the ACK frame, the MME sends a handover command to the base station A. After receiving the handover command, the base station A sends the SN of the SDU to the base station B through the MME, and the base station B sorts the SDUs sent by the mobile phone to the base station B according to the SN, so as to obtain the correct service data. After the mobile phone establishes an RRC connection with the base station B, the mobile phone may send an RRC connection reestablishment complete message to the base station B.
  • the RRC connection re-establishment method provided by the present invention is described in detail from the perspective of the method.
  • the base station and the MME provided by the present invention are respectively introduced from the perspective of a functional module.
  • the present invention provides a base station, which can serve as a target base station, and has the function of implementing the target base station in the embodiment shown in FIG. 3 or FIG.
  • the target base station 500 includes:
  • the receiving module 501 is configured to receive an RRC connection reestablishment request sent by the mobile terminal;
  • the sending module 502 is configured to send a base station configuration transmission message to the MME according to the RRC connection reestablishment request, where the base station configures the transmission message for the MME to send the MME configuration transmission message generated according to the base station configuration transmission message to the source base station, where the base station configures the transmission message and the MME.
  • the configuration transmission message carries parameters for acquiring the context of the mobile terminal, and the parameters of the context of the mobile terminal are used to acquire the context of the mobile terminal from the source base station;
  • the receiving module 501 is further configured to receive a handover request sent by the MME, where the handover request carries the mobile The context of the terminal;
  • the sending module 502 is further configured to send an RRC connection reestablishment message to the mobile terminal according to the context of the mobile terminal.
  • the parameter for acquiring the context of the mobile terminal includes at least: a target base station identifier, a cell identifier of the target cell, a request context identifier, a physical cell identifier of the source cell, and The cell radio network temporary identifier of the source cell, the target cell belongs to the target base station, and the source cell belongs to the source base station.
  • the sending module 502 is further configured to send a handover request acknowledgement message to the MME according to the handover request, so that the MME sends a handover command to the source base station, where the handover command is used to indicate that the source base station performs the S1 link handover with the target base station;
  • the receiving module 501 is further configured to receive a status transmission message sent by the MME, where the status transmission message is obtained by the MME from the source base station;
  • the base station 500 further includes
  • the arranging module 601 is configured to arrange the service data units in the target base station according to the sequence number in the status transmission message;
  • the receiving module 501 is further configured to receive an RRC connection reestablishment complete message sent by the mobile terminal.
  • the sending module 502 is further configured to send a handover complete notification to the MME, so that the MME sends the release context indication to the source base station, and the release context indication is used to indicate that the source base station clears the context of the mobile terminal.
  • the RRC connection reestablishment request carries the physical cell identifier of the active cell and the cell radio network temporary identifier of the source cell.
  • the MME is the first MME
  • the target base station is connected to the first MME
  • the source base station is connected to the second MME, the first MME and the base station.
  • the second MME connects to the communication.
  • the present invention provides an MME 700, which has the function of implementing the MME in the embodiment shown in FIG. 3 or FIG.
  • the MME 700 includes:
  • the receiving module 701 is configured to receive a base station configuration transmission message sent by the target base station, where the base station configuration transmission message carries a parameter for acquiring a context of the mobile terminal, and acquiring a parameter of the context of the mobile terminal, for acquiring a context of the mobile terminal from the source base station;
  • the generating module 702 is configured to generate an MME configuration transmission message according to the base station configuration transmission message.
  • the sending module 703 is configured to send the MME configuration transmission message to the source base station;
  • the receiving module 701 is further configured to receive a required handover message sent by the source base station;
  • the sending module 703 is further configured to send a handover request to the target base station according to the required handover message, where the handover message is required, and the handover request respectively carries the context of the mobile terminal, so that the target base station sends the RRC connection reestablishment message to the mobile terminal according to the context of the mobile terminal. .
  • the receiving module 701 is further configured to receive a handover request acknowledgement message sent by the target base station;
  • the sending module 702 is further configured to send a handover command to the source base station according to the handover request acknowledgement message, where the handover command is used to indicate that the source base station performs the S1 link handover with the target base station;
  • the receiving module 701 is further configured to receive a status transmission message sent by the source base station;
  • the sending module 702 is further configured to send a status transmission message to the target base station, so that the target base station arranges the service data units in the target base station according to the sequence number in the status transmission message.
  • the receiving module 701 is further configured to receive a handover completion notification sent by the target base station;
  • the sending module 702 is further configured to send, according to the handover completion notification, a release context indication to the source base station, where the release context indication is used to indicate that the source base station clears the context of the mobile terminal.
  • the MME is the first MME, the target base station is connected to the first MME, and the source base station is connected to the second MME, and the first MME is connected to the MME according to the MME shown in FIG. 7 or the optional embodiment.
  • the second MME connects to the communication;
  • the sending module 703 is specifically configured to send the MME configuration transmission message to the second MME, where the second MME sends the MME configuration transmission message to the source base station;
  • the receiving module 701 is specifically configured to receive a required handover message sent by the second MME, where the handover message is obtained by the second MME from the source base station.
  • the present invention provides a base station 800, which can serve as a source base station, and has the function of implementing a source base station in the embodiment shown in FIG. 3 or FIG.
  • Base station 800 includes:
  • the receiving module 801 is configured to receive an MME configuration transmission message sent by the target base station by using the MME, where the MME configuration transmission message carries a parameter for acquiring a context of the mobile terminal, and acquiring a parameter of the context of the mobile terminal, for acquiring a context of the mobile terminal from the source base station,
  • the MME configuration transmission message is generated by the MME according to the base station configuration transmission message sent by the target base station;
  • An obtaining module 802 configured to acquire a context of the mobile terminal according to a parameter for acquiring a context of the mobile terminal;
  • the sending module 803 is configured to send a handover request message to the MME, so that the MME sends a handover message to the target base station according to the required handover message, and the handover message and the handover message respectively carry the context of the mobile terminal.
  • the receiving module 801 is further configured to receive a handover command sent by the MME, where the handover command is used to indicate that the source base station performs the S1 link handover with the target base station.
  • the sending module 803 is further configured to send the state transmission information to the MME according to the handover command, so that the MME sends the state transmission information to the target base station, where the sequence number of the state transmission message is used to sort the service data units in the target base station.
  • the receiving module 801 is further configured to receive a release context indication sent by the MME, where the release context indication is used to indicate that the source base station clears the context of the mobile terminal.
  • the base station 800 further includes:
  • the context module 901 is configured to clear the context of the mobile terminal according to the release context indication.
  • the MME is the first MME, the target base station is connected to the first MME, and the source base station is connected to the second MME, the first MME and the base station.
  • the second MME connects to the communication
  • the receiving module 801 is specifically configured to receive an MME configuration transmission message sent by the second MME, where the MME configuration transmission message is obtained by the second MME from the first MME.
  • the sending module 803 is specifically configured to send a required handover message to the second MME, so that the second MME sends a handover request message to the first MME.
  • the source base station is the base station A
  • the target base station is the base station B
  • the mobile terminal takes the mobile phone as an example
  • the mobile phone may send an RRC connection reestablishment request to the receiving module 501, where the request carries the PCI of the cell A, the CRNTI of the cell A, and the mobile phone ShortMAC-I;
  • the receiving module 501 may further determine, according to the PCI and the CRNTI, that the base station that has a link abnormality with the mobile phone is the base station A, and if the base station B does not configure the X2 link of the base station B to the base station A, the sending module 502, according to the RRC connection reestablishment request, Sending an eNB Configuration transfer to the MME, the eNB Configuration transfer carrying the identity of the base station A, the identity of the base station B, the request context identifier, PCI, CRNTI, ShortMAC-I;
  • the generating module 702 After the receiving module 701 receives the eNB Configuration transfer, the generating module 702 generates an MME Configuration transfer, and the MME Configuration transfer is the same as the eNB Configuration transfer carrying parameter, and then the sending module 703 sends the MME Configuration transfer to the receiving module 801.
  • the obtaining module 802 obtains the UE Context from the local device according to the foregoing parameter carried in the MME Configuration transfer, and then the sending module 803 sends the UE Context to the receiving module 701, the sending module 703 sends the UE Context to the receiving module 501, and the sending module 502 according to the UE Context.
  • An RRC Connection Reestablishment message is sent to the handset to establish an RRC connection.
  • the sending module 502 may further send an ACK frame to the MME, to indicate that the air interface resource and the service bearer resource may be allocated to the mobile phone.
  • the sending module 702 sends a switching command to the receiving module 801.
  • the receiving module 801 sends the SN of the SDU to the receiving module 701
  • the sending module 702 sends the SN to the receiving module 701
  • the arranging module 601 sorts the SDUs sent by the SN to the base station B according to the SN, so as to obtain the correct Business data.
  • the mobile phone may send an RRC connection reestablishment complete message to the receiving module 501.
  • the base station and the MME of the present invention are described in detail from the perspective of a functional module.
  • the base station and the MME of the present invention are described in detail below from the perspective of a hardware device:
  • FIG. 10 is a schematic structural diagram of a server according to an embodiment of the present invention. The steps performed by the target base station in the foregoing embodiment may be based on the server structure shown in FIG. 10.
  • the server 1000 may generate a large difference due to different configurations or performances, and may include one Or more than one central processing unit (CPU) 1022 (eg, one or more processors) and memory 1032, one or more storage media 1030 storing application 1042 or data 1044 (eg, one or one in Shanghai Storage device).
  • the memory 1032 and the storage medium 1030 may be short-term storage or persistent storage.
  • the program stored on storage medium 1030 may include one or more modules (not shown), each of which may include a series of instruction operations in the server.
  • the central processor 1022 can be configured to communicate with the storage medium 1030 on which a series of instruction operations in the storage medium 1030 are performed.
  • Server 1000 may also include one or more power sources 1026, one or more wired or wireless network interfaces 1050, one or more input and output interfaces 1058, and/or one or more operating systems 1041, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • operating systems 1041 such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • the processor 1022 is configured to execute the following method by calling an operation instruction stored in the storage medium 1030:
  • a base station configuration transmission message to the MME, where the base station configures the transmission message for the MME to send the MME configuration transmission message generated according to the base station configuration transmission message to the source base station, where the base station configuration transmission message and the MME configuration transmission message respectively carry Obtaining a parameter of a context of the mobile terminal, and acquiring a parameter of a context of the mobile terminal, for acquiring a context of the mobile terminal from the source base station;
  • An RRC Connection Reestablishment message is sent to the mobile terminal according to the context of the mobile terminal.
  • the parameter for acquiring the context of the mobile terminal includes at least: a target base station identifier, a cell identifier of the target cell, a request context identifier, a physical cell identifier of the source cell, and a cell radio network temporary identifier of the source cell.
  • the target cell belongs to the target base station, and the source cell belongs to the source base station.
  • the processor 1022 is further configured to send a handover request acknowledgement message to the MME according to the handover request, so that the MME sends a handover command to the source base station, where the handover command is used to indicate that the source base station performs the target base station with the target base station.
  • the processor 1022 is further configured to send a handover complete notification to the MME, so that the MME sends the release context indication to the source base station, and the release context indication is used to indicate that the source base station clears the context of the mobile terminal. .
  • the RRC connection reestablishment request carries a physical cell identifier and a cell radio network temporary identifier
  • the processor 1022 is further configured to: after receiving the RRC connection reestablishment request sent by the mobile terminal, determine, according to the physical cell identifier and the cell radio network temporary identifier, a source base station for storing a context of the mobile terminal;
  • the performing target base station sends a base station configuration transmission message to the MME according to the RRC connection reestablishment request.
  • the MME is the first MME
  • the target base station is connected to the first MME
  • the source base station is connected to the second MME
  • the first MME is directly or indirectly connected to the second MME.
  • FIG. 11 is a schematic structural diagram of a server according to an embodiment of the present invention. The steps performed by the MME in the foregoing embodiment may be based on the server structure shown in FIG. 11.
  • the server 1100 can vary considerably depending on configuration or performance, and can include one or more central processing unit CPUs 1122 (eg, one or more processors) and memory 1132, one or more storage applications 1142 or data.
  • Storage medium 1130 of 1144 eg, one or one storage device in Shanghai.
  • the memory 1132 and the storage medium 1130 may be short-term storage or persistent storage.
  • the program stored on storage medium 1130 may include one or more modules (not shown), each of which may include a series of instruction operations in the server.
  • central processor 1122 can be configured to communicate with storage medium 1130, executing a series of instruction operations in storage medium 1130 on server 1100.
  • Server 1100 may also include one or more power sources 1126, one or more wired or wireless network interfaces 1150, one or more input and output interfaces 1158, and/or one or more operating systems 1141, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • operating systems 1141 such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • the processor 1122 is configured to execute the following method by calling an operation instruction stored in the storage medium 1130:
  • a base station configuration transmission message carries a parameter for acquiring a context of the mobile terminal, and acquiring a parameter of the context of the mobile terminal, for acquiring a context of the mobile terminal from the source base station;
  • the processor 1122 is further configured to: after the MME sends a handover request to the target base station according to the required handover message,
  • the status transmission message sent by the source base station is received, and the status transmission message is sent to the target base station, so that the target base station arranges the service data units in the target base station according to the sequence number in the status transmission message.
  • the processor 1122 is further configured to receive a handover completion notification sent by the target base station;
  • the release context indication is sent to the source base station, and the release context indication is used to indicate that the source base station clears the context of the mobile terminal.
  • the processor 1122 is specifically configured to send an MME configuration transmission message to the second MME, where the second MME sends the MME configuration transmission message to the source base station, and receives the requirement sent by the second MME.
  • the handover message requires that the handover message is obtained by the second MME from the source base station.
  • FIG. 12 is a schematic structural diagram of a server according to an embodiment of the present invention. The steps performed by the source base station in the foregoing embodiment may be based on the server structure shown in FIG. 12.
  • the server 1200 can vary considerably depending on configuration or performance, and can include one or more central processing unit CPUs 1222 (eg, one or more processors) and memory 1232, one or more storage applications 1242 or data. 1244 of storage medium 1230 (eg, one or one storage device in Shanghai). Wherein, the storage 1232 and the storage medium 1230 can Is short-lived storage or persistent storage.
  • the program stored on storage medium 1230 may include one or more modules (not shown), each of which may include a series of instruction operations in the server. Still further, central processor 1222 can be configured to communicate with storage medium 1230, executing a series of instruction operations in storage medium 1230 on server 1200.
  • Server 1200 may also include one or more power sources 1226, one or more wired or wireless network interfaces 1250, one or more input and output interfaces 1258, and/or one or more operating systems 1241, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • operating systems 1241 such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • the processor 1222 is configured to execute the following method by calling an operation instruction stored in the storage medium 1230:
  • the MME configuration transmission message carries a parameter for acquiring a context of the mobile terminal, and acquiring a parameter of the context of the mobile terminal, for acquiring a context of the mobile terminal from the source base station, where the MME is configured.
  • the transmission message is generated by the MME according to the base station configuration transmission message sent by the target base station;
  • the MME is required to send a handover message, so that the MME sends a handover message to the target base station according to the required handover message, and the handover message and the handover message respectively carry the context of the mobile terminal.
  • the processor 1222 is further configured to receive a handover command sent by the MME, where the handover command is used to indicate that the source base station performs an S1 link handover with the target base station;
  • the state transmission information is sent to the MME, so that the MME sends the state transmission information to the target base station, and the sequence number of the state transmission message is used to sort the service data units in the target base station.
  • the processor 1222 is further configured to: after the source base station sends the required handover message to the MME, receive a release context indication sent by the MME, where the release context indication is used to indicate that the source base station clears the context of the mobile terminal. ;
  • the processor 1222 is specifically configured to receive an MME configuration transmission message sent by the second MME, where the MME configuration transmission message is obtained by the second MME from the first MME, and is sent to the second MME. The message is switched such that the second MME sends a handover message to the first MME.

Abstract

本发明实施例公开了RRC连接重建方法，包括：目标基站接收移动终端发送的RRC连接重建请求，然后根据RRC连接重建请求，向MME发送基站配置传输消息，以使得MME将根据基站配置传输消息生成的MME配置传输消息发送给源基站；目标基站接收MME发送的切换请求之后，根据移动终端的上下文，向移动终端发送RRC连接重建消息。本发明实施例还公开了可以实现该RRC连接重建方法的移动终端、基站和MME。本发明能够在目标基站和源基站之间不存在X2链路的条件下，解决目标基站无法从源基站获取移动终端的上下文的问题，提高了RRC连接重建的成功率。

Description

一种RRC连接重建方法和装置 技术领域
本发明涉及通信领域，尤其涉及一种RRC连接重建方法和装置。
背景技术
无线资源控制协议(Radio Resource Control，简称RRC)是一种用户设备(User Equipment，简称UE)和陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，简称UTRAN)之间的应用层协议，用于处理UE和UTRAN之间信令和数据。当UE从一个小区移动到另一个小区，或者，UE与演进型基站(Evolved Node-B，简称eNB)之间的通信信号受到严重干扰时，UE和源eNB之间的RRC连接会发生故障，造成无线链路失败(Radio Link Failure，简称RLF)。此时，通信系统可以通过切换基站并建立UE与目标基站的RRC连接，将UE切换到另一小区，以保证通信质量。
由于UE的上下文(例如终端网络能力、源基站标识等)存储在源基站，目标基站需要从源基站获取UE的上下文信息之后，才能重建该UE到目标基站的RRC连接。在现有技术中，源基站和目标基站一般配置有X2链路，目标基站可以通过X2链路从源基站获取移动终端的上下文，该过程大致如下：
UE和源基站之间的无线链路发生异常时，UE向目标基站发起RRC连接重建请求，目标基站向源基站发送RLF指示，源基站通过X2链路将切换请求发送给目标基站，该切换请求携带有UE的上下文，目标基站根据上下文为UE分配空口资源和业务承载资源。
在实际应用中，目标基站与源基站之间不存在X2链路，当UE和源基站之间的无线链路发生异常时，目标基站无法通过X2链路从源基站获取移动终端的上下文，从而导致UE与目标基站之间的RRC连接重建失败，造成掉话。
发明内容
本发明提供了一种RRC连接重建方法和装置，能够在目标基站和源基站之间不存在X2链路的条件下，解决目标基站无法从源基站获取移动终端的上 下文的问题，提高了RRC连接重建的成功率。
本发明第一方面提供了一种RRC连接重建方法，包括：目标基站接收移动终端发送的RRC连接重建请求，然后根据RRC连接重建请求，向MME发送基站配置传输消息，MME将根据基站配置传输消息生成的MME配置传输消息发送给源基站；目标基站接收MME发送的切换请求之后，根据移动终端的上下文，向移动终端发送RRC连接重建消息，以建立目标基站与移动终端之间的RRC连接。其中，基站配置传输消息及MME配置传输消息分别携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文，切换请求携带有移动终端的上下文。依此实施，配置传输消息携带的获取移动终端的上下文的参数可以经过一个或多个MME达到源基站，源基站可以根据该获取移动终端的上下文的参数，将移动终端的上下文经MME发送给目标基站。可见，本发明解决了在目标基站与源基站之间无X2链路的条件下，目标基站无法从源基站获取移动终端的上下文的问题。
在一个可能实现方式中，获取移动终端的上下文的参数至少包括：目标基站标识、目标小区的小区标识、请求上下文标识、源小区的物理小区标识以及源小区的小区无线网络临时标识。目标小区属于目标基站，源小区属于源基站。
在另一个可能的实现方式中，在目标基站接收MME发送的切换请求之后，目标基站可以根据切换请求，向MME发送切换请求确认消息，以使得MME向源基站发送切换命令；目标基站接收MME发送的状态传输消息之后，按照状态传输消息中的序列号将目标基站中的业务数据单元进行排列，目标基站还可以接收移动终端发送的RRC连接重建完成消息。其中，切换命令用于指示源基站与目标基站进行S1链路切换，状态传输消息为MME从源基站获取的。依此实施方式，目标基站还可以按照上述序列号，将移动终端发送的业务数据单元按照正确方式排列。
在另一个可能实现方式中，在目标基站接收移动终端发送的RRC连接重建完成消息之后，目标基站向MME发送切换完成通知，以使得MME将释放上下文指示发送给源基站，释放上下文指示用于指示源基站清除移动终端的上下文。依此实施方式，在移动终端与目标基站重建RRC连接之后，源基站可以清除移动终端的上下文，以节约源基站的网络资源以及存储资源。
在另一个可能实现方式中，RRC连接重建请求携带有源小区的物理小区标识以及源小区的小区无线网络临时标识。
本发明第二方面提供一种RRC连接重建方法，包括：MME接收目标基站发送的基站配置传输消息，然后根据基站配置传输消息生成MME配置传输消息，再将MME配置传输消息发送给源基站；MME接收源基站发送的需要切换消息之后，根据需要切换消息向目标基站发送切换请求，以使得目标基站根据移动终端的上下文向移动终端发送RRC连接重建消息。其中，基站配置传输消息携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文，需要切换消息与切换请求分别携带有移动终端的上下文。依此实施，MME可以将配置传输消息携带的获取移动终端的上下文的参数发送给源基站，源基站可以根据该获取移动终端的上下文的参数，将移动终端的上下文发送给目标基站。可见，本发明解决了在目标基站与源基站之间无X2链路的条件下，目标基站无法从源基站获取移动终端的上下文的问题。
在一个可能实现方式中，在MME根据需要切换消息向目标基站发送切换请求之后，MME接收目标基站发送的切换请求确认消息，然后根据切换请求确认消息向源基站发送切换命令；MME接收源基站发送的状态传输消息之后，将状态传输消息发送给目标基站，以使得目标基站按照状态传输消息中的序列号，将目标基站中的业务数据单元进行排列。其中，切换命令用于指示源基站与目标基站进行S1链路切换。依此实施方式，MME还可以传递状态传输消息，以使得目标基站按照上述序列号，将移动终端发送的业务数据单元按照正确方式排列。
在另一个可能实现方式中，MME接收目标基站发送的切换完成通知之后，根据切换完成通知，将释放上下文指示发送给源基站，释放上下文指示用于指示源基站清除移动终端的上下文。依此实施方式，在移动终端与目标基站重建RRC连接之后，MME可以向源基站发送释放上下文指示，使得源基站清除移动终端的上下文，以节约源基站的网络资源以及存储资源。
本发明第三方面提供一种RRC连接重建方法，包括：源基站接收移动性管理实体MME发送的MME配置传输消息，MME配置传输消息携带有获取 移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文，MME配置传输消息是MME根据目标基站发送的基站配置传输消息生成的；源基站根据获取移动终端的上下文的参数，获取移动终端的上下文；源基站向MME发送需要切换消息，以使得MME根据需要切换消息向目标基站发送切换消息，需要切换消息与切换消息分别携带有移动终端的上下文。依此实施，源基站可以识别目标基站经过MME发送的获取移动终端的上下文的参数，根据该获取移动终端的上下文的参数，将移动终端的上下文发送给目标基站，从而使得目标基站与移动终端建立RRC连接。可见，本发明解决了目标基站与源基站无X2链路的条件下，目标基站无法从源基站获取移动终端的上下文的问题。
在一个可能实现方式中，源基站接收MME发送的切换命令，然后根据切换命令，将状态传输信息发送给MME，以使得MME将状态传输信息发送给目标基站。其中，切换命令用于指示源基站与目标基站进行S1链路切换，状态传输消息的序列号用于对目标基站中的业务数据单元进行排序。依此实施方式，源基站可以将状态传输消息经MME发送给目标基站，以使得目标基站按照上述序列号，将移动终端发送的业务数据单元按照正确方式排列。
在另一个可能实现方式中，在源基站向MME发送需要切换消息之后，源基站接收MME发送的释放上下文指示，然后根据释放上下文指示，清除移动终端的上下文。其中，释放上下文指示用于指示源基站清除移动终端的上下文。依此实施方式，源基站可以清除移动终端的上下文，以节约源基站的网络资源以及存储资源。
第四方面提供一种基站，该基站具有实现上述第一方面中目标基站行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
第五方面提供一种MME，该MME具有实现上述第二方面中MME行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
第六方面提供一种基站，该基站具有实现上述第三方面中源基站行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或 软件包括一个或多个与上述功能相对应的模块。
在本发明提供的RRC连接重建方法中，目标基站可以根据来自移动终端的RRC连接重建请求，向MME发送用于从源基站获取移动终端的上下文的配置传输消息，配置传输消息经过至少一个MME到达源基站，源基站根据配置传输消息，将移动终端的上下文经MME透传给目标基站，目标基站根据移动终端的上下文，与移动终端建立RRC连接。由于MME可以透传配置传输消息，该配置传输消息可以经过不同的MME从目标基站到达源基站，因此目标基站可以从源基站获取移动终端的上下文，再根据移动终端的上下文重建RRC连接，本发明解决了在目标基站与源基站无X2链路的条件下，目标基站无法从源基站获取移动终端的上下文的问题，提高了RRC连接重建的成功率。
附图说明
图1为本发明实施例中通信系统的一个示意图；
图2为现有技术中X2链路切换方法的一个信令示意图；
图3为本发明实施例中RRC连接重建方法的一个信令示意图；
图4为本发明实施例中RRC连接重建方法的一个信令示意图；
图5为本发明实施例中目标基站的一个结构示意图；
图6为本发明实施例中目标基站的另一个结构示意图；
图7为本发明实施例中MME的一个结构示意图；
图8为本发明实施例中源基站的一个结构示意图；
图9为本发明实施例中源基站的另一个结构示意图；
图10为本发明实施例中目标基站的另一个结构示意图；
图11为本发明实施例中MME的另一个结构示意图；
图12为本发明实施例中源基站的另一个结构示意图。
具体实施方式
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，都属于本发明保护的范围。
首先对本发明提供的RRC连接重建方法所应用的通信系统架构进行介绍，请参阅图1：
在长期演进(Long Term Evolution，简称LTE)系统中，eNB和演进型分组核心网(Evolved Packer Core Network，简称EPC)通过S1链路连接。
EPC包括移动管理实体(Mobility Management Entity，简称MME)及系统架构演进网关(SAE GateWay，简称SGW)。例如，MME作为控制面部分，负责控制面的移动性管理，包括用户上下文和移动状态管理，分配用户临时身份标识等。SGW作为用户面部分，负责空闲状态下为下行数据发起寻呼，管理保存因特网协议(Internet Protocol，简称IP)承载参数和网络内路由信息等。
基站是指在接入网的空中接口上通过一个或多个小区与无线终端通信的设备。基站可用于将收到的空中帧与网际协议(Internel Protocol，简称IP)分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括IP网络。基站还可协调空中接口的属性管理。例如，基站可以是GSM或CDMA中的基站(Base Transceiver Station，简称BTS)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(evolutional Node B，简称NodeB或eNB或e-NodeB)，或是LTE的后续演进系统的演进型基站，本发明对此并不做限定。
终端，指的是向用户提供语音和/或数据连通性的设备，包括无线终端或有线终端。无线终端可以是具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备，经无线接入网(Radio Access Network，简称RAN)与一个或多个核心网进行通信的移动终端。例如，无线终端可以是移动电话(或称为“蜂窝”电话)和具有移动终端的计算机。又如，无线终端也可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。再如，无线终端还可以是个人通信业务(Personal Communication Service，简称PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol，简称SIP)话机、无线本地环路(Wireless Local Loop，简称WLL)站、个人数字助理(Personal Digital Assistant，简称PDA)等设备。再如，无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站 (Remote Station)、接入点(Access Point)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device)、或用户装备(User Equipment，简称UE)。
在本发明的通信系统中，eNB与MME之间通过S1接口的代理(proxy)功能，实现eNB与MME间控制面信令的传递。eNB与SGW之间通过S1接口的代理(proxy)功能，实现eNB与SGW间用户面信令的传递。若eNB到eNB配置有X2链路，eNB之间也可以通过X2链路传输信令和数据。在eNB与终端之间通过RRC连接传输信令和数据。
请参阅图2，基站间通过X2获取移动终端的上下文的过程大致如下：
步骤201、UE和源基站之间的无线链路发生异常时，UE向目标基站发起RRC连接重建请求(RRC Reestablishment Request)。
步骤202、目标基站向源基站发送无线链路失败指示(RLF Indication)。
步骤203、源基站将切换请求(Handover Request)发送给目标基站，切换请求携带有上下文(UE Context)。
步骤204、如果目标基站能够为UE分配空口资源和业务承载资源，目标基站向源基站发送切换请求确认消息(Handover Request ACK)。
步骤205、目标基站向UE发送RRC连接重建消息(RRC Reestablishment Setup)，以指示切换开始。目标基站可以根据上下文为UE分配空口资源和业务承载资源。
步骤206、源基站响应切换请求确认消息，将状态传输信息(eNB Status transfer，简称eNB Status transfer)发送给目标基站。状态传输消息携带有业务数据单元(Service Data Unit，简称SDU)的序列号，该序列号用于将UE与目标基站之间的上行同步。当上行同步之后，UE与目标基站之间的RRC连接建立完成。
步骤207、UE接入目标基站之后，向目标基站发送RRC连接重建完成消息(RRC Connection Reestablishment Complete)，以示UE已经切换到目标基站。
步骤208、切换完成之后，目标基站向源基站发送释放上下文消息(UE Context Release)。
在现有技术中，如果目标基站要获取UE的上下文，那么目标基站和源基站之间需要设置X2链路，并且目标基站和源基站与同一MME连接通信。
在目标基站与源基站之间无X2链路的情况下，当UE和源基站之间的无线链路发生异常时，目标基站无法通过X2链路从源基站获取移动终端的上下文，从而导致UE与目标基站之间的RRC连接重建失败，造成掉话。
为了解决目标基站无法从源基站获取移动终端的上下文的问题，本发明提供了一种RRC连接重建方法，以提高RRC连接重建成功率。在实际应用中，源基站和目标基站可能连接到同一个MME，也可能连接到不同MME，下面分别对以上两种场景下RRC连接重建方法进行介绍：
一、源基站和目标基站连接到同一个MME：
请参阅图3，本发明提供的RRC连接重建方法的一个实施例包括：
步骤301、目标基站接收移动终端发送的RRC连接重建请求。
本实施例中，当移动终端与源基站发生RLF时，移动终端向目标基站发送RRC连接重建请求，RRC连接重建请求包括但不限于以下参数：源小区的物理小区标识(Physical Cell Identity，简称PCI)、源小区的小区无线网络临时标识(Cell Radio Network Temporary Identifier，简称CRNTI)。
需要说明的是，RRC连接重建请求还可以携带终端校验码(ShortMAC-I)。
步骤302、目标基站根据RRC连接重建请求，向MME发送基站配置传输消息。
目标基站响应RRC连接重建请求，生成基站配置传输消息。基站配置传输消息携带有获取移动终端的上下文的参数，该获取移动终端的上下文的参数至少包括以下信息：目标基站标识，目标小区的小区标识、请求上下文标识、源小区的PCI以及源小区的CRNTI。目标小区是移动终端进行RRC连接重建的服务小区，其属于目标基站；源小区是移动终端发生RLF之前所在小区，其属于目标小区。
其中，目标基站标识以及目标小区的小区标识用于通知源基站，与上述移动终端重建RRC连接的基站以及重建RRC连接所在小区。请求上下文标识、源小区的PCI、源小区的CRNTI用于指示源基站获取上述移动终端的上下文。
作为一个可选的实施方式，当RRC连接请求携带有终端校验码时，获取 移动终端的上下文的参数还包括终端校验码，该终端校验码用于基站对移动终端进行校验，以避免非法终端仿冒合法终端接入基站。举例来说，终端校验码可以是通过密钥将移动终端源小区的频点和/或PCI进行加密计算所得的值。
举例来说，基站配置传输消息为协议定义的eNB Configuration transfer，其携带有自优化网络配置传输(Self-Optimizing Network Configuration transfer，简称SON Configuration transfer)信元。在SON配置传输信元中，各参数的取值可以为如下所示：
(1)将Target eNBID中的Global eNB ID参数设置为上述目标基站标识。
(2)将无线链路失败报告(RLF Report)中rsrpResult-R9参数设置为0，将rsrqResult-R9参数设置为0，以及，将RLF Report的CellGolbalID设置为F。以上设置表示请求上下文的标识位。
(3)将RLF Report中previousPCellId-r10参数设置为上述目标小区的小区标识。
(4)将RLF Report中PhysCellId-r10的参数设置为上述PCI。
(5)将RLF Report中crnti-r11的参数设置为上述CRNTI。
(6)将RLF Report中reestablishmentCellid-r10的参数设置为上述ShortMAC-I。
可以理解的是，在本发明实施例中，SON消息的作用是获取移动终端的上下文。上述各参数功能对应的名称仅为示意性的，还可以设置为其他名称。
步骤303、MME向源基站发送MME配置传输消息。
MME接收目标基站发送的基站配置传输消息(eNB Configuration transfer)之后，根据eNB配置传输消息生成MME配置传输消息(MME Configuration transfer)，将MME配置传输消息发送给源基站。根据协议规定，MME配置传输消息与eNB配置传输消息携带的信元取值相同，每个MME都可以识别并转发MME配置传输消息。MME可以通过透传方式将eNB配置传输消息携带的获取移动终端的上下文的参数发送给源基站。
步骤304、源基站根据获取移动终端的上下文的参数，向MME发送需要切换消息(Handover Required)。
源基站获取MME配置传输消息之后，根据其携带的获取移动终端的上下 文的参数(请求上下文标识位、PCI以及CRNTI)，从本地查找并获取移动终端的上下文，然后根据目标基站标识以及目标小区标识确定收取上述上下文的基站，将移动终端的上下文携带在需要切换消息中，发送给MME。
步骤305、MME向目标基站发送切换请求。
MME接收需要切换消息之后，生成切换请求，将该切换请求发送给目标基站。切换请求携带有移动终端的上下文。
步骤306、目标基站响应切换请求，向MME发送切换请求确认消息。
目标基站收到切换请求之后，可以向MME发送切换请求确认消息。切换请求确认消息表示目标基站具有为移动终端分配空口资源和业务承载资源的能力。
步骤307、目标基站向移动终端发送RRC连接重建消息。
RRC连接重建消息用于表示目标基站和源基站的切换过程开始。移动终端可以响应RRC连接重建消息，向目标基站发送信令以及业务数据单元。
在实际应用中，目标基站还可以通过其他的MME可以透传的S1消息来实现从源基站获取上下文的功能，此处不作限定。
本实施例中，由于获取移动终端的上下文可以携带于MME配置传输消息，当获取移动终端的上下文的参数经过MME透传至源基站之后，目标基站可以从源基站获取移动终端的上下文，从而建立目标基站与移动终端之间的RRC连接。
在实际应用中，目标基站分别从移动终端和源基站获取了业务数据，为了将来自移动终端和源基站的业务数据进行正确排序，目标基站可以执行以下步骤：
步骤308、MME向源基站发送切换命令(Handover Command)，切换命令用于指示源基站与目标基站进行S1链路切换。
步骤309、源基站向MME发送状态传输消息(Status transfer)。
源基站可以响应MME发送的切换命令，将状态传输消息发送给MME。状态传输消息包括业务数据单元(Service Data Unit，简称SDU)的序列号(Sequence Number，简称SN)。该SN用于目标基站对获取到的业务数据单元进行排列。
步骤310、MME将状态传输消息发送给目标基站。
目标基站接收状态传输消息之后，可以根据状态传输消息中的序列号，对获取到的业务数据单元进行排序。
步骤311、移动终端向目标基站发送RRC连接重建完成消息。
本实施例中，当获取移动终端的上下文的参数经过MME透传至源基站之后，目标基站可以从源基站获取移动终端的上下文，从而建立目标基站与移动终端之间的RRC连接。并且，目标基站可以从源基站获取业务数据单元的序列号，将业务数据进行排序，从而完成移动终端从源小区到目标小区的切换。然后，移动终端可以向目标基站发送RRC连接重建完成消息。
可见，本发明实施例解决了RRC连接重建失败造成的掉话现象，提高了掉话重建的成功率。
需要说明的是，步骤308至步骤311并非本发明提供的RRC连接重建方法的必要步骤，在实际应用中也可以不执行，此处不作限定。
作为本发明的一个可选实施例，在步骤311之后，该RRC连接重建方法还包括：
目标基站向MME发送切换完成通知，以使得MME将释放上下文指示发送给源基站，释放上下文指示用于指示源基站清除移动终端的上下文。
作为本发明的一个可选实施例，在步骤301之后，且在步骤302之前，该RRC连接重建方法还包括：
目标基站根据RRC连接重建请求中的PCI以及CRNTI，确定用于存储移动终端的上下文的源基站；
若目标基站与源基站之间不存在X2链路，则执行步骤302；
若目标基站与源基站之间存在X2链路，则执行其他流程。
具体的，RRC连接重建请求携带有PCI以及CRNTI，目标基站根据PCI以及CRNTI可以确定用于存储移动终端的上下文的源基站。目标基站检查目标基站与源基站之间是否存在X2链路，若不存在，执行步骤402；若存在，目标基站可以向源基站发送无线链路失败指示，以使得目标基站通过X2链路向源基站发送移动终端的上下文。可见，目标基站可以在实际应用中选择通过X2链路获取移动终端的上下文，也可以通过S1接口获取移动终端的上下文， 实施过程具有良好的灵活性。
二、源基站和目标基站连接到不同MME：
请参阅图4，本发明提供的RRC连接重建方法的另一个实施例包括：
步骤401、目标基站接收移动终端发送的RRC连接重建请求。
步骤402、目标基站响应RRC连接重建请求，向第一MME发送基站配置传输消息。
本实施例中，步骤401至步骤402与图3所示实施例中步骤301至302相似，此处不再赘述。
步骤403、第一MME向第二MME发送MME配置传输消息。
步骤404、第二MME向源基站发送MME配置传输消息。
由步骤403及步骤404可见，MME配置传输消息为通信协议规定的具有透传能力的消息，因此各MME或基站可以识别并转发。
步骤405、源基站根据配置传输消息，向第二MME发送需要切换消息。
其中，步骤404至步骤405与图3所示实施例中步骤303至304相似，此处不再赘述。
步骤406、第二MME向第一MME发送需要切换消息。
步骤407、第一MME向目标基站发送切换请求。
步骤408、目标基站响应切换请求，向第一MME发送切换请求确认消息。
步骤409、目标基站向移动终端发送RRC连接重建消息。
其中，步骤407至步骤409与图3所示实施例中步骤305至307相似，此处不再赘述。
步骤410、第一MME向第二MME发送切换请求确认消息。
步骤411、第二MME向源基站发送切换命令，切换命令用于指示源基站与目标基站进行S1链路切换。
步骤412、源基站向第二MME发送状态传输消息，状态传输消息携带有移动终端的上下文。
其中，步骤411至步骤412与图3所示实施例中步骤308至309相似，此处不再赘述。
步骤413、第二MME将状态传输消息发送给第一MME。
步骤414、第一MME将状态传输消息发送给目标基站。
目标基站根据状态传输消息，建立目标基站到移动终端的RRC连接。
步骤415、移动终端向目标基站发送RRC连接重建完成消息。
其中，步骤414至步骤415与图3所示实施例中步骤310至311相似，此处不再赘述。
在本实施例中，第一MME和第二MME可以透传配置传输消息、需要切换消息、切换请求确认消息以及状态传输消息，使得目标基站能够从源基站获取移动终端的上下文，并根据移动终端的上下文建立目标基站与移动终端的RRC连接。
可以理解的是，如果第一MME和第二MME没有直接通信，而是通过其他MME进行间接通信，本发明的配置传输消息仍然可以通过各MME，从目标基站传递至源基站，使得目标基站能够获取移动终端的上下文，从而完成RRC重建。
可见，本发明实施例解决了跨MME时RRC连接重建失败造成的掉话现象，提高了掉话重建的成功率。
在目标基站和源基站分别连接不同MME的情况下，如果目标基站和源基站之间存在X2连接，目标基站也无法跨MME，通过X2链路从源基站获取移动终端的上下文。或者，目标基站、源基站连接的MME分别由不同的厂家制造，那么目标基站对应的MME无法识别来自源基站的切换请求，因此目标基站也无法从源基站获取UE的上下文。本发明实施例的基站配置传输消息、MME配置传输消息是协议定义的透传消息，不同MME都可以识别并转发，因此本发明实施例能够适用于以上场景，可以解决在以上场景中目标基站无法从源基站获取移动终端的上下文的问题。
为便于理解，下面以一个具体应用场景对本发明提供的RRC连接重建方法进行详细描述：
在本发明提供的具体应用场景中，源基站为基站A，目标基站为基站B，移动终端以手机为例；
当手机与基站A的RRC连接异常时，手机可以向基站B发送RRC连接重建请求，该请求携带有PCI、CRNTI、ShortMAC-I；
基站B可以根据PCI及CRNTI确定与手机发生链路异常的基站为基站A，基站B可以查找本地是否配置基站B到基站A的X2链路，若没有，则基站B根据RRC连接重建请求，向MME发送eNB Configuration transfer，该eNB Configuration transfer携带有基站B的小区标识、基站B的标识、请求上下文标识、基站A的PCI、基站A的CRNTI、ShortMAC-I；
MME获取eNB Configuration transfer之后，生成MME Configuration transfer，MME Configuration transfer与eNB Configuration transfer携带参数相同，然后根据基站A的PCI以及基站A的CRNTI，向基站A发送MME Configuration transfer。基站A首先根据ShortMAC-I判断获取UE上下文的终端是否为合法用户，若是，则根据MME Configuration transfer中的请求上下文标识，从本地获取UE Context，然后通过MME发送给基站B以发起切换请求。基站B获取UE Context之后，根据UE Context向手机发送RRC连接重建消息，以建立RRC连接。基站B获取UE Context之后，还可以向MME发送ACK帧，以表示可以为手机分配空口资源以及业务承载资源。MME收到ACK帧之后，向基站A发送切换命令。基站A收到切换命令之后，通过MME向基站B发送SDU的SN，基站B根据上述SN对手机发送给基站B的SDU进行排序，从而获取正确的业务数据。手机与基站B建立RRC连接之后，手机可以向基站B发送RRC连接重建完成消息。
以上从方法角度对本发明提供的RRC连接重建方法进行了详细介绍，下面从功能模块角度对本发明提供的基站和MME分别进行介绍。请参阅图5，本发明提供一种基站，该基站可以作为目标基站，具有实现图3或图4所示实施例中目标基站的功能。目标基站500包括：
接收模块501，用于接收移动终端发送的RRC连接重建请求；
发送模块502，用于根据RRC连接重建请求，向MME发送基站配置传输消息，基站配置传输消息用于MME将根据基站配置传输消息生成的MME配置传输消息发送给源基站，基站配置传输消息及MME配置传输消息分别携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文；
接收模块501，还用于接收MME发送的切换请求，切换请求携带有移动 终端的上下文；
发送模块502，还用于根据移动终端的上下文，向移动终端发送RRC连接重建消息。
基于图5所示的基站，在本发明的一个可选实施例中，获取移动终端的上下文的参数至少包括：目标基站标识、目标小区的小区标识、请求上下文标识、源小区的物理小区标识以及源小区的小区无线网络临时标识，目标小区属于目标基站，源小区属于源基站。
基于图5所示的基站，或可选实施例，在本发明的另一个可选实施例中，
发送模块502，还用于根据切换请求，向MME发送切换请求确认消息，以使得MME向源基站发送切换命令，切换命令用于指示源基站与目标基站进行S1链路切换；
接收模块501，还用于接收MME发送的状态传输消息，状态传输消息为MME从源基站获取的；
请参阅图6，基站500还包括；
排列模块601，用于按照状态传输消息中的序列号，将目标基站中的业务数据单元进行排列；
接收模块501，还用于接收移动终端发送的RRC连接重建完成消息。
基于图5所示的基站或可选实施例，在本发明的另一个可选实施例中，
发送模块502，还用于向MME发送切换完成通知，以使得MME将释放上下文指示发送给源基站，释放上下文指示用于指示源基站清除移动终端的上下文。
基于图5所示的基站或可选实施例，在本发明的另一个可选实施例中，RRC连接重建请求携带有源小区的物理小区标识以及源小区的小区无线网络临时标识。
基于图5所示的基站，或可选实施例，在本发明的另一个可选实施例中，MME为第一MME，目标基站连接第一MME，源基站连接第二MME，第一MME与第二MME连接通信。
请参阅图7，本发明提供一种MME700，具有实现图3或图4所示实施例中MME的功能。MME700包括：
接收模块701，用于接收目标基站发送的基站配置传输消息，基站配置传输消息携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文；
生成模块702，用于根据基站配置传输消息生成MME配置传输消息；
发送模块703，用于将MME配置传输消息发送给源基站；
接收模块701，还用于接收源基站发送的需要切换消息；
发送模块703，还用于根据需要切换消息向目标基站发送切换请求，需要切换消息以及切换请求分别携带有移动终端的上下文，以使得目标基站根据移动终端的上下文，向移动终端发送RRC连接重建消息。
基于图7所示的MME700，在本发明的另一个可选实施例中，
接收模块701，还用于接收目标基站发送的切换请求确认消息；
发送模块702，还用于根据切换请求确认消息向源基站发送切换命令，切换命令用于指示源基站与目标基站进行S1链路切换；
接收模块701，还用于接收源基站发送的状态传输消息；
发送模块702，还用于将状态传输消息发送给目标基站，以使得目标基站根据状态传输消息中的序列号，将目标基站中的业务数据单元进行排列。
基于图7所示的MME，或可选实施例，在本发明的另一个可选实施例中，
接收模块701，还用于接收目标基站发送的切换完成通知；
发送模块702，还用于根据切换完成通知，将释放上下文指示发送给源基站，释放上下文指示用于指示源基站清除移动终端的上下文。
基于图7所示的MME，或可选实施例，在本发明的另一个可选实施例中，MME为第一MME，目标基站连接第一MME，源基站连接第二MME，第一MME与第二MME连接通信；
发送模块703，具体用于将MME配置传输消息发送给第二MME，由第二MME将MME配置传输消息发送给源基站；
接收模块701，具体用于接收第二MME发送的需要切换消息，需要切换消息是第二MME从源基站获取的。
请参阅图8，本发明提供一种基站800，该基站可以作为源基站，具有实现图3或图4所示实施例中源基站的功能。基站800包括：
接收模块801，用于接收目标基站通过MME发送的MME配置传输消息，MME配置传输消息携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文，MME配置传输消息是MME根据目标基站发送的基站配置传输消息生成的；
获取模块802，用于根据获取移动终端的上下文的参数，获取移动终端的上下文；
发送模块803，用于向MME发送需要切换消息，以使得MME根据需要切换消息向目标基站发送切换消息，需要切换消息与切换消息分别携带有移动终端的上下文。
基于图8所示的基站，或可选实施例，在本发明的另一个可选实施例中，
接收模块801，还用于接收MME发送的切换命令，切换命令用于指示源基站与目标基站进行S1链路切换；
发送模块803，还用于根据切换命令，将状态传输信息发送给MME，以使得MME将状态传输信息发送给目标基站，状态传输消息的序列号用于对目标基站中的业务数据单元进行排序。
基于图8所示的基站，或可选实施例，在本发明的另一个可选实施例中，
接收模块801，还用于接收MME发送的释放上下文指示，释放上下文指示用于指示源基站清除移动终端的上下文；
请参阅图9，基站800还包括：
释放上下文模块901，用于根据释放上下文指示，清除移动终端的上下文。
基于图8所示的基站，或可选实施例，在本发明的另一个可选实施例中，MME为第一MME，目标基站连接第一MME，源基站连接第二MME，第一MME与第二MME连接通信；
接收模块801，具体用于接收第二MME发送的MME配置传输消息，MME配置传输消息是第二MME从第一MME获取的；
发送模块803，具体用于向第二MME发送需要切换消息，以使得第二MME将需要切换消息发送给第一MME。
为便于理解，下面一个具体应用场景对本发明提供的基站以及MME中各模块之间的交互进行详细介绍：
在本发明提供的具体应用场景中，源基站为基站A，目标基站为基站B，移动终端以手机为例；
当手机与基站A的RRC连接异常时，手机可以向接收模块501发送RRC连接重建请求，该请求携带有小区A的PCI、小区A的CRNTI以及该手机ShortMAC-I；
接收模块501还可以根据上述PCI及CRNTI确定与手机发生链路异常的基站为基站A，若在基站B中没有配置基站B到基站A的X2链路，则发送模块502根据RRC连接重建请求，向MME发送eNB Configuration transfer，该eNB Configuration transfer携带有基站A的标识、基站B的标识、请求上下文标识、PCI、CRNTI、ShortMAC-I；
接收模块701接收eNB Configuration transfer之后，生成模块702生成MME Configuration transfer，MME Configuration transfer与eNB Configuration transfer携带参数相同，然后发送模块703向接收模块801发送MME Configuration transfer。获取模块802根据MME Configuration transfer中携带的上述参数，从本地获取UE Context，然后发送模块803将UE Context发送给接收模块701，发送模块703将UE Context发送给接收模块501，发送模块502根据UE Context向手机发送RRC连接重建消息，以建立RRC连接。接收模块501获取UE Context之后，发送模块502还可以向MME发送ACK帧，以表示可以为手机分配空口资源以及业务承载资源。接收模块701收到ACK帧之后，发送模块702向接收模块801发送切换命令。接收模块801收到切换命令之后，将SDU的SN发送给接收模块701，发送模块702向接收模块701发送上述SN，排列模块601根据上述SN对手机发送给基站B的SDU进行排序，从而获取正确的业务数据。手机与基站B建立RRC连接之后，手机可以向接收模块501发送RRC连接重建完成消息。
以上从功能模块的角度对本发明的基站以及MME进行了详细介绍，下面从硬件装置的角度对本发明的基站以及MME进行详细介绍：
图10是本发明实施例提供的一种服务器结构示意图，上述实施例中由目标基站所执行的步骤可以基于该图10所示的服务器结构。
该服务器1000可因配置或性能不同而产生比较大的差异，可以包括一个 或一个以上中央处理器(Central Processing Units，CPU)1022(例如，一个或一个以上处理器)和存储器1032，一个或一个以上存储应用程序1042或数据1044的存储介质1030(例如一个或一个以上海量存储设备)。其中，存储器1032和存储介质1030可以是短暂存储或持久存储。存储在存储介质1030的程序可以包括一个或一个以上模块(图示没标出)，每个模块可以包括对服务器中的一系列指令操作。更进一步地，中央处理器1022可以设置为与存储介质1030通信，在服务器1000上执行存储介质1030中的一系列指令操作。
服务器1000还可以包括一个或一个以上电源1026，一个或一个以上有线或无线网络接口1050，一个或一个以上输入输出接口1058，和/或，一个或一个以上操作系统1041，例如Windows ServerTM，Mac OS XTM，UnixTM,LinuxTM，FreeBSDTM等等。
通过调用存储介质1030存储的操作指令，处理器1022用于执行如下方法：
接收移动终端发送的RRC连接重建请求；
根据RRC连接重建请求，向MME发送基站配置传输消息，基站配置传输消息用于MME将根据基站配置传输消息生成的MME配置传输消息发送给源基站，基站配置传输消息及MME配置传输消息分别携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文；
接收MME发送的切换请求，切换请求携带有移动终端的上下文；
根据移动终端的上下文，向移动终端发送RRC连接重建消息。
在本发明的一个可选实施例中，获取移动终端的上下文的参数至少包括：目标基站标识、目标小区的小区标识、请求上下文标识、源小区的物理小区标识以及源小区的小区无线网络临时标识，目标小区属于目标基站，源小区属于源基站。
在本发明的另一个可选实施例中，处理器1022还用于根据切换请求向MME发送切换请求确认消息，以使得MME向源基站发送切换命令，切换命令用于指示源基站与目标基站进行S1链路切换；
接收MME发送的状态传输消息，状态传输消息为MME从源基站获取的；
按照状态传输消息中的序列号，将目标基站中的业务数据单元进行排列；
接收移动终端发送的RRC连接重建完成消息。
在本发明的另一个可选实施例中，处理器1022还用于向MME发送切换完成通知，以使得MME将释放上下文指示发送给源基站，释放上下文指示用于指示源基站清除移动终端的上下文。
在本发明的另一个可选实施例中，RRC连接重建请求携带有物理小区标识以及小区无线网络临时标识；
处理器1022还用于在接收移动终端发送的RRC连接重建请求之后，根据物理小区标识以及小区无线网络临时标识，确定用于存储移动终端的上下文的源基站；
若目标基站与源基站之间不存在X2链路，则执行目标基站根据RRC连接重建请求，向MME发送基站配置传输消息的步骤。
在本发明的另一个可选实施例中，MME为第一MME，目标基站连接第一MME，源基站连接第二MME，第一MME与第二MME直接或间接连接通信。
图11是本发明实施例提供的一种服务器结构示意图，上述实施例中由MME所执行的步骤可以基于该图11所示的服务器结构。
该服务器1100可因配置或性能不同而产生比较大的差异，可以包括一个或一个以上中央处理器CPU1122(例如，一个或一个以上处理器)和存储器1132，一个或一个以上存储应用程序1142或数据1144的存储介质1130(例如一个或一个以上海量存储设备)。其中，存储器1132和存储介质1130可以是短暂存储或持久存储。存储在存储介质1130的程序可以包括一个或一个以上模块(图示没标出)，每个模块可以包括对服务器中的一系列指令操作。更进一步地，中央处理器1122可以设置为与存储介质1130通信，在服务器1100上执行存储介质1130中的一系列指令操作。
服务器1100还可以包括一个或一个以上电源1126，一个或一个以上有线或无线网络接口1150，一个或一个以上输入输出接口1158，和/或，一个或一个以上操作系统1141，例如Windows ServerTM，Mac OS XTM，UnixTM,LinuxTM，FreeBSDTM等等。
通过调用存储介质1130存储的操作指令，处理器1122用于执行如下方法：
接收目标基站发送的基站配置传输消息，基站配置传输消息携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文；
根据基站配置传输消息生成MME配置传输消息；
将MME配置传输消息发送给源基站；
接收源基站发送的需要切换消息，根据需要切换消息向目标基站发送切换请求，需要切换消息与切换请求分别携带有移动终端的上下文，以使得目标基站根据移动终端的上下文，向移动终端发送RRC连接重建消息。
在本发明的一个可选实施例中，处理器1122还用于在MME根据需要切换消息向目标基站发送切换请求之后，
接收目标基站发送的切换请求确认消息，根据切换请求确认消息向源基站发送切换命令，切换命令用于指示源基站与目标基站进行S1链路切换；
接收源基站发送的状态传输消息，将状态传输消息发送给目标基站，以使得目标基站按照状态传输消息中的序列号，将目标基站中的业务数据单元进行排列。
在本发明的另一个可选实施例中，处理器1122还用于接收目标基站发送的切换完成通知；
根据切换完成通知，将释放上下文指示发送给源基站，释放上下文指示用于指示源基站清除移动终端的上下文。
在本发明的另一个可选实施例中，处理器1122具体用于将MME配置传输消息发送给第二MME，由第二MME将MME配置传输消息发送给源基站；接收第二MME发送的需要切换消息，需要切换消息是第二MME从源基站获取的。
图12是本发明实施例提供的一种服务器结构示意图，上述实施例中由源基站所执行的步骤可以基于该图12所示的服务器结构。
该服务器1200可因配置或性能不同而产生比较大的差异，可以包括一个或一个以上中央处理器CPU1222(例如，一个或一个以上处理器)和存储器1232，一个或一个以上存储应用程序1242或数据1244的存储介质1230(例如一个或一个以上海量存储设备)。其中，存储器1232和存储介质1230可以 是短暂存储或持久存储。存储在存储介质1230的程序可以包括一个或一个以上模块(图示没标出)，每个模块可以包括对服务器中的一系列指令操作。更进一步地，中央处理器1222可以设置为与存储介质1230通信，在服务器1200上执行存储介质1230中的一系列指令操作。
服务器1200还可以包括一个或一个以上电源1226，一个或一个以上有线或无线网络接口1250，一个或一个以上输入输出接口1258，和/或，一个或一个以上操作系统1241，例如Windows ServerTM，Mac OS XTM，UnixTM,LinuxTM，FreeBSDTM等等。
通过调用存储介质1230存储的操作指令，处理器1222用于执行如下方法：
接收目标基站通过移动性管理实体MME发送的MME配置传输消息，MME配置传输消息携带有获取移动终端的上下文的参数，获取移动终端的上下文的参数用于从源基站获取移动终端的上下文，MME配置传输消息是MME根据目标基站发送的基站配置传输消息生成的；
根据获取移动终端的上下文的参数，获取移动终端的上下文；
向MME发送需要切换消息，以使得MME根据需要切换消息向目标基站发送切换消息，需要切换消息与切换消息分别携带有移动终端的上下文。
在本发明的一个可选实施例中，处理器1222还用于接收MME发送的切换命令，切换命令用于指示源基站与目标基站进行S1链路切换；
根据切换命令，将状态传输信息发送给MME，以使得MME将状态传输信息发送给目标基站，状态传输消息的序列号用于对目标基站中的业务数据单元进行排序。
在本发明的另一个可选实施例中，处理器1222还用于在源基站向MME发送需要切换消息之后，接收MME发送的释放上下文指示，释放上下文指示用于指示源基站清除移动终端的上下文；
根据释放上下文指示，清除移动终端的上下文。
在本发明的另一个可选实施例中，处理器1222具体用于接收第二MME发送的MME配置传输消息，MME配置传输消息是第二MME从第一MME获取的；向第二MME发送需要切换消息，以使得第二MME将需要切换消息发送给第一MME。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (22)

  1. 一种RRC连接重建方法，其特征在于，包括：
    目标基站接收移动终端发送的无线资源控制RRC连接重建请求；
    所述目标基站根据所述RRC连接重建请求，向移动性管理实体MME发送基站配置传输消息，所述基站配置传输消息用于所述MME将根据所述基站配置传输消息生成MME配置传输消息并发送给源基站，所述基站配置传输消息及所述MME配置传输消息分别携带有获取移动终端的上下文的参数，所述获取移动终端的上下文的参数用于从所述源基站获取所述移动终端的上下文；
    所述目标基站接收所述MME发送的切换请求，所述切换请求携带有所述移动终端的上下文；
    所述目标基站根据所述移动终端的上下文，向所述移动终端发送RRC连接重建消息。
  2. 根据权利要求1所述的方法，其特征在于，所述获取移动终端的上下文的参数至少包括：目标基站标识、目标小区的小区标识、请求上下文标识、源小区的物理小区标识以及源小区的小区无线网络临时标识，所述目标小区属于所述目标基站，所述源小区属于所述源基站。
  3. 根据权利要求1或2所述的方法，其特征在于，在所述目标基站接收所述MME发送的切换请求之后，所述方法还包括：
    所述目标基站根据所述切换请求，向所述MME发送切换请求确认消息，以使得所述MME向所述源基站发送切换命令，所述切换命令用于指示所述源基站与所述目标基站进行S1链路切换；
    所述目标基站接收所述MME发送的状态传输消息，所述状态传输消息为所述MME从源基站获取的；
    所述目标基站按照所述状态传输消息中的序列号，将所述目标基站中的业务数据单元进行排列；
    所述目标基站接收所述移动终端发送的RRC连接重建完成消息。
  4. 根据权利要求3所述的方法，其特征在于，在所述目标基站接收所述移动终端发送的RRC连接重建完成消息之后，所述方法还包括：
    所述目标基站向所述MME发送切换完成通知，以使得所述MME将释放 上下文指示发送给所述源基站，所述释放上下文指示用于指示所述源基站清除所述移动终端的上下文。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述RRC连接重建请求携带有源小区的物理小区标识以及源小区的小区无线网络临时标识。
  6. 一种RRC连接重建方法，其特征在于，包括：
    移动性管理实体MME接收目标基站发送的基站配置传输消息，所述基站配置传输消息携带有获取移动终端的上下文的参数，所述获取移动终端的上下文的参数用于从所述源基站获取所述移动终端的上下文；
    所述MME根据所述基站配置传输消息生成MME配置传输消息；
    所述MME将所述MME配置传输消息发送给所述源基站；
    所述MME接收所述源基站发送的需要切换消息，根据所述需要切换消息向所述目标基站发送切换请求，所述需要切换消息与所述切换请求分别携带有所述移动终端的上下文，以使得所述目标基站根据所述移动终端的上下文，向所述移动终端发送RRC连接重建消息。
  7. 根据权利要求6所述的方法，其特征在于，在所述MME根据所述需要切换消息向所述目标基站发送切换请求之后，所述方法还包括：
    所述MME接收所述目标基站发送的切换请求确认消息，根据所述切换请求确认消息向所述源基站发送切换命令，所述切换命令用于指示所述源基站与所述目标基站进行S1链路切换；
    所述MME接收所述源基站发送的状态传输消息，将所述状态传输消息发送给所述目标基站，以使得所述目标基站按照所述状态传输消息中的序列号，将所述目标基站中的业务数据单元进行排列。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述MME接收目标基站发送的切换完成通知；
    所述MME根据所述切换完成通知，将释放上下文指示发送给所述源基站，所述释放上下文指示用于指示所述源基站清除所述移动终端的上下文。
  9. 一种RRC连接重建方法，其特征在于，包括：
    源基站接收移动性管理实体MME发送的MME配置传输消息，所述MME 配置传输消息携带有获取移动终端的上下文的参数，所述获取移动终端的上下文的参数用于从所述源基站获取移动终端的上下文，所述MME配置传输消息是所述MME根据目标基站发送的基站配置传输消息生成的；
    所述源基站根据所述获取移动终端的上下文的参数，获取所述移动终端的上下文；
    所述源基站向所述MME发送需要切换消息，以使得所述MME根据需要切换消息向所述目标基站发送切换消息，所述需要切换消息与所述切换消息分别携带有所述移动终端的上下文。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    所述源基站接收所述MME发送的切换命令，所述切换命令用于指示所述源基站与所述目标基站进行S1链路切换；
    所述源基站根据所述切换命令，将状态传输信息发送给所述MME，以使得所述MME将所述状态传输信息发送给所述目标基站，所述状态传输消息的序列号用于对所述目标基站中的业务数据单元进行排序。
  11. 根据权利要求10所述的方法，其特征在于，在所述源基站向所述MME发送需要切换消息之后，所述方法还包括：
    所述源基站接收所述MME发送的释放上下文指示，所述释放上下文指示用于指示所述源基站清除所述移动终端的上下文；
    所述源基站根据所述释放上下文指示，清除所述移动终端的上下文。
  12. 一种基站，其特征在于，所述基站作为目标基站，所述目标基站包括：
    接收模块，用于接收移动终端发送的无线资源控制RRC连接重建请求；
    发送模块，用于根据所述RRC连接重建请求，向移动性管理实体MME发送基站配置传输消息，所述基站配置传输消息用于所述MME将根据基站配置传输消息生成的MME配置传输消息发送给源基站，所述基站配置传输消息及所述MME配置传输消息分别携带有获取移动终端的上下文的参数，所述获取移动终端的上下文的参数用于从所述源基站获取所述移动终端的上下文；
    所述接收模块，还用于接收MME发送的切换请求，所述切换请求携带有所述移动终端的上下文；
    所述发送模块，还用于根据所述移动终端的上下文，向所述移动终端发送 RRC连接重建消息。
  13. 根据权利要求12所述的基站，其特征在于，所述获取移动终端的上下文的参数至少包括：目标基站标识、目标小区的小区标识、请求上下文标识、源小区的物理小区标识以及源小区的小区无线网络临时标识，所述目标小区属于所述目标基站，所述源小区属于所述源基站。
  14. 根据权利要求12或13所述的基站，其特征在于，
    所述发送模块，还用于根据所述切换请求，向所述MME发送切换请求确认消息，以使得所述MME向所述源基站发送切换命令，所述切换命令用于指示所述源基站与所述目标基站进行S1链路切换；
    所述接收模块，还用于接收所述MME发送的状态传输消息，所述状态传输消息为所述MME从源基站获取的；
    排列模块，用于按照所述状态传输消息中的序列号，将所述目标基站中的业务数据单元进行排列；
    所述接收模块，还用于接收所述移动终端发送的RRC连接重建完成消息。
  15. 根据权利要求14所述的基站，其特征在于，
    所述发送模块，还用于向所述MME发送切换完成通知，以使得所述MME将释放上下文指示发送给所述源基站，所述释放上下文指示用于指示所述源基站清除所述移动终端的上下文。
  16. 根据权利要求12至15中任一项所述的基站，其特征在于，所述RRC连接重建请求携带有源小区的物理小区标识以及源小区的小区无线网络临时标识。
  17. 一种移动性管理实体MME，其特征在于，包括：
    接收模块，用于接收目标基站发送的基站配置传输消息，所述基站配置传输消息携带有获取移动终端的上下文的参数，所述获取移动终端的上下文的参数用于从所述源基站获取所述移动终端的上下文；
    生成模块，用于根据所述基站配置传输消息生成MME配置传输消息；
    发送模块，用于将所述MME配置传输消息发送给所述源基站；
    所述接收模块，还用于接收所述源基站发送的需要切换消息；
    所述发送模块，还用于根据所述需要切换消息向所述目标基站发送切换请 求，所述需要切换消息以及所述切换请求分别携带有所述移动终端的上下文，以使得所述目标基站根据所述移动终端的上下文，向所述移动终端发送RRC连接重建消息。
  18. 根据权利要求17所述的MME，其特征在于，
    所述接收模块，还用于接收所述目标基站发送的切换请求确认消息；
    所述发送模块，还用于根据所述切换请求确认消息向所述源基站发送切换命令，所述切换命令用于指示所述源基站与所述目标基站进行S1链路切换；
    所述接收模块，还用于接收所述源基站发送的状态传输消息；
    所述发送模块，还用于将所述状态传输消息发送给所述目标基站，以使得所述目标基站按照所述状态传输消息中的序列号，将所述目标基站中的业务数据单元进行排列。
  19. 根据权利要求18所述的MME，其特征在于，
    所述接收模块，还用于接收目标基站发送的切换完成通知；
    所述发送模块，还用于根据所述切换完成通知，将释放上下文指示发送给所述源基站，所述释放上下文指示用于指示所述源基站清除所述移动终端的上下文。
  20. 一种基站，其特征在于，所述基站作为源基站，所述基站包括：
    接收模块，用于接收移动性管理实体MME发送的MME配置传输消息，所述MME配置传输消息携带有获取移动终端的上下文的参数，所述获取移动终端的上下文的参数用于从所述源基站获取移动终端的上下文，所述MME配置传输消息是所述MME根据目标基站发送的基站配置传输消息生成的；
    获取模块，用于根据所述获取移动终端的上下文的参数，获取所述移动终端的上下文；
    发送模块，用于向所述MME发送需要切换消息，以使得所述MME根据需要切换消息向所述目标基站发送切换消息，所述需要切换消息与所述切换消息分别携带有所述移动终端的上下文。
  21. 根据权利要求20所述的基站，其特征在于，
    所述接收模块，还用于接收所述MME发送的切换命令，所述切换命令用于指示所述源基站与所述目标基站进行S1链路切换；
    所述发送模块，还用于根据所述切换命令，将状态传输信息发送给所述MME，以使得所述MME将所述状态传输信息发送给所述目标基站，所述状态传输消息的序列号用于对所述目标基站中的业务数据单元进行排序。
  22. 根据权利要求21所述的基站，其特征在于，
    所述接收模块，还用于接收所述MME发送的释放上下文指示，所述释放上下文指示用于指示所述源基站清除所述移动终端的上下文；所述基站还包括：
    释放上下文模块，用于根据所述释放上下文指示，清除所述移动终端的上下文。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111565479A (zh) * 2019-02-14 2020-08-21 华为技术有限公司 通信方法及其装置、系统
CN112715038A (zh) * 2019-01-28 2021-04-27 Oppo广东移动通信有限公司 一种参数配置方法及装置、网络设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110677922A (zh) * 2019-10-10 2020-01-10 东阳市人民医院 用于传输肛肠外科大数据信息的装置及非暂时性计算机可读存储介质
CN114125963A (zh) * 2021-11-22 2022-03-01 中国电信股份有限公司 无线资源控制rrc连接重建方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1225773A1 (en) * 2001-01-22 2002-07-24 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Tandem free Hand-over
US20060223532A1 (en) * 2003-04-03 2006-10-05 Sheng Liu Method for user equipment mobility management and communication system
CN101043714A (zh) * 2006-03-21 2007-09-26 华为技术有限公司 实现用户设备的移动性管理的方法及系统
CN103108403A (zh) * 2011-11-10 2013-05-15 中兴通讯股份有限公司 跨基站rrc连接重建方法及系统
CN103782628A (zh) * 2013-04-18 2014-05-07 华为技术有限公司 通信方法、设备和系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1225773A1 (en) * 2001-01-22 2002-07-24 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Tandem free Hand-over
US20060223532A1 (en) * 2003-04-03 2006-10-05 Sheng Liu Method for user equipment mobility management and communication system
CN101043714A (zh) * 2006-03-21 2007-09-26 华为技术有限公司 实现用户设备的移动性管理的方法及系统
CN103108403A (zh) * 2011-11-10 2013-05-15 中兴通讯股份有限公司 跨基站rrc连接重建方法及系统
CN103782628A (zh) * 2013-04-18 2014-05-07 华为技术有限公司 通信方法、设备和系统

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112715038A (zh) * 2019-01-28 2021-04-27 Oppo广东移动通信有限公司 一种参数配置方法及装置、网络设备
CN112715038B (zh) * 2019-01-28 2023-05-09 Oppo广东移动通信有限公司 一种参数配置方法及装置、网络设备
CN111565479A (zh) * 2019-02-14 2020-08-21 华为技术有限公司 通信方法及其装置、系统
CN111565479B (zh) * 2019-02-14 2022-05-24 华为技术有限公司 通信方法及其装置、系统

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