WO2017173586A1 - 一种用户终端的管理方法及相关设备 - Google Patents

一种用户终端的管理方法及相关设备 Download PDF

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Publication number
WO2017173586A1
WO2017173586A1 PCT/CN2016/078504 CN2016078504W WO2017173586A1 WO 2017173586 A1 WO2017173586 A1 WO 2017173586A1 CN 2016078504 W CN2016078504 W CN 2016078504W WO 2017173586 A1 WO2017173586 A1 WO 2017173586A1
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Prior art keywords
enb
mme
connection
request message
message
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PCT/CN2016/078504
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English (en)
French (fr)
Inventor
何岳
金辉
欧阳国威
窦凤辉
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华为技术有限公司
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Priority to PCT/CN2016/078504 priority Critical patent/WO2017173586A1/zh
Priority to CN201680084101.9A priority patent/CN108886474B/zh
Publication of WO2017173586A1 publication Critical patent/WO2017173586A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications

Definitions

  • the embodiments of the present invention relate to the field of mobile communications technologies, and in particular, to a method for managing a user terminal and related devices.
  • the vehicle network is based on the in-vehicle network, the inter-vehicle network and the in-vehicle mobile Internet.
  • wireless communication and information exchange between the vehicle and the outside world (Vehicle to X, V2X)
  • the system network can realize intelligent traffic management, intelligent dynamic information service and intelligent vehicle control.
  • X includes cars, roads, pedestrians and the Internet.
  • the user equipment performs the V2X data service.
  • the core network side that is, the Evolved Packet System (EPS)
  • EPS Evolved Packet System
  • the base station uniformly schedules resources and UEs.
  • the resource is selected autonomously from the resource pool acquired by the base station side.
  • the UE In the mode in which the base station uniformly allocates resources, the UE needs to be in the radio resource control (RRC) connection state, so that the UE can apply for resources from the base station side to meet the V2X in time when the V2X message needs to be sent.
  • RRC radio resource control
  • the UE when the UE is in the RRC connected state, it is generally in the Evolved Packet System Connection (ECM) connection state, and when the UE is in the ECM connection state, once the serving cell is changed, A switch will be triggered.
  • ECM Evolved Packet System Connection
  • the embodiment of the invention discloses a method for managing a user terminal and related devices, which can reduce the signaling load of the network.
  • the first aspect of the embodiment of the present invention discloses a method for managing a user terminal UE, which is applied to a mobility management entity MME, and the method may include:
  • the MME may initiate a first process to enable the UE to enter a target state according to the first request message.
  • the first request message is used to request that the UE enter a target state.
  • the target state the UE and the UE
  • the context of the UE is transmitted between the s-eNB and the target base station t-eNB.
  • the MME may have an RRC connection between the UE and the s-eNB by initiating the first process, so that there is no DRB, and there is no S1-U bearer of the UE between the s-eNB and the SGW.
  • the s-eNB and the target base station only need to transfer the context of the UE, and do not need to re-establish the DRB, and the SGW does not need to modify the S1-U bearer of the UE, so that The signaling load of the network side in the handover process of the UE in the ECM connection state is reduced.
  • the MME receiving the first request message may specifically include:
  • the MME receives the first request message sent by the UE in the ECM idle state if there is a V2X service transmission requirement.
  • the first process initiated by the MME may specifically include:
  • the MME After receiving the first request message, the MME sends a second request message to the SGW, where the second request message is used to request the SGW to delete the S1-U bearer of the UE; and the MME receives the second request message sent by the SGW.
  • the s-eNB After the response message, the s-eNB sends an indication message to the s-eNB to delete the information about the SGW in the context of the UE, and configures the UE to release the DRB between the s-eNB and the s-eNB.
  • the indication message may carry the first information, where the first information is used to notify the UE to enter a target state.
  • the method may further include:
  • the MME receives a response message that the s-eNB sends the indication message, where the response message of the indication message is cancelled.
  • the information is used to indicate that the relevant information of the SGW has been deleted and the DRB release between the UE and the s-eNB is completed.
  • the method may further include:
  • the MME After receiving the first request message, the MME deletes the connection information or suspends with the S1-AP connection of the s-eNB except the control plane interface S1-AP connection identifier MME UE S1 AP ID in the MME.
  • the MME After receiving the first request message, the MME deletes the connection information of the S1-AP connection with the s-eNB, and instructs the s-eNB to delete the connection information of the S1-AP connection with the MME;
  • the MME After receiving the first request message, the MME reserves the S1-AP connection with the s-eNB, and instructs the s-eNB to reserve the S1-AP connection with the MME.
  • the s-eNB suspends the S1-AP connection with the MME, and the MME deletes the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB or suspends S1-AP connection of the s-eNB, or if the s-eNB deletes the connection information of the S1-AP connection with the MME, and the MME deletes the connection information of the S1-AP connection with the s-eNB, the UE is in the MME The ECM is connected to the ECM idle state. If the s-eNB reserves an S1-AP connection with the MME and the MME also maintains an S1-AP connection with the s-eNB, the UE is still in the ECM connected state in the MME.
  • the method may further include:
  • the MME may delete the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB or suspend the s-eNB with the s-eNB.
  • S1-AP connection ;
  • the MME may delete the connection information of the S1-AP connection with the s-eNB after receiving the first request message or after receiving the response message indicating the message;
  • the MME may reserve the S1-AP connection with the s-eNB after receiving the first request message or after receiving the response message indicating the message.
  • the first request message may be an extended service request, where the extended service request includes an identifier for indicating that the S1-U bearer and the DRB are not required to be established for the UE, Therefore, the first process initiated by the MME may specifically include:
  • the MME may send a third request message to the s-eNB according to the extended service request, where the third request message includes V2X related information of the UE, where the The three request message is used to request the s-eNB to establish a V2X related context for the UE.
  • the method may further include:
  • the MME receives the downlink service transmission notification sent by the SGW about the UE; if the UE is in the target state and is in the ECM idle state, the MME manages the MME.
  • the eNB (that is, all the base stations in the tracking area list TA list to which the UE belongs) sends a paging paging message, where the paging message includes the paging identifier of the UE and an indication that the UE is in a target state, and the indication is used by the eNB.
  • the eNB indicating that the paging message is received checks whether the paging identifier of the UE is saved.
  • the MME sends a paging message to all the base stations in the TA list to which the UE belongs, and the base station that receives the paging message will cooperate with the MME if the paging identifier of the UE is saved. Establish an S1-AP connection to schedule resources for the UE.
  • the second aspect of the embodiment of the present invention discloses an MME, which may include a transceiver module, a processing module, and the like, and may be used to execute the UE management method disclosed in the first aspect.
  • the third aspect of the embodiment of the present invention discloses another MME, where the MME may include a transceiver, a processor, and the like, and the transceiver corresponds to the transceiver module of the MME disclosed in the second aspect, and the processor corresponds to the MME disclosed in the second aspect.
  • the processing module can be used to execute the management method of the UE disclosed in the first aspect.
  • the fourth aspect of the embodiments of the present invention discloses another method for managing a UE, which is applied to an s-eNB, and the method may include:
  • the s-eNB may send a first request message to the MME, where the first request message is used to request the UE to enter the target state.
  • the RRC connection exists between the UE and the s-eNB, and there is no DRB, s - there is no S1-U bearer of the UE between the eNB and the SGW; then, when the MME initiates the first process according to the first request message to make the UE enter the target state, and the serving base station of the UE changes, s- Only the context of the UE needs to be transmitted between the eNB and the t-eNB, and the SGW is not required to update the UE.
  • S1-U bearer is not required to update the UE.
  • the eNB may send a first request message for requesting the UE to enter the target state, and after receiving the request message, the MME may initiate a first process to bring the UE into the target state.
  • the eNB deletes the related information of the SGW according to the indication, and configures the UE to release the DRB, so that the UE has an RRC connection with the base station in the target state, but there is no DRB, and the eNB and the SGW do not.
  • the UE needs to be in the RRC connected state when performing the V2X service, and in the case that the serving base station of the UE changes, only the context of the UE needs to be transmitted between the source base station and the target base station, and the DRB does not need to be re-established.
  • the SGW is also not required to modify the S1-U bearer of the UE, so that the signaling load of the UE in the ECM connection state during the handover process can be reduced.
  • the MME initiates the first process to enable the UE to enter the target state.
  • the method may further include:
  • the s-eNB may delete the related information of the SGW in the context of the UE according to the giant indication message, and configure the UE to release the DRB between the s-eNB and the s-eNB.
  • the indication message is used to indicate that the s-eNB deletes related information of the SGW in the context of the UE, and configures the UE to release the DRB between the s-eNB and the s-eNB.
  • the indication message sent by the MME may carry the first information, where the first information is used to notify the UE to enter the target state.
  • the method may further include:
  • the s-eNB may also send a response message of the indication message to the MME, where the response message of the indication message is used to indicate that the related information of the SGW has been deleted and the DRB release between the UE and the s-eNB is completed.
  • the method may further include:
  • the s-eNB receives the first request message sent by the UE, and the first request message is sent to the s-eNB by the UE in the ECM connection state without data transmission in the first time period. That is, the s-eNB forwards the first request message sent by the UE to the MME.
  • the s-eNB detects that the UE in the ECM connected state has no data transmission during the second time period
  • the s-eNB detects that the UE is performing V2X services.
  • the method may further include:
  • the s-eNB detects that the UE in the ECM connection state has no data transmission in the second time period, and can detect that the UE is performing V2X service. That is, the s-eNB detects the first request message sent to the MME if the UE in the ECM connected state has no data transmission in the second time period and the UE is performing V2X service.
  • the method may further include:
  • the indication message is further used to indicate that the s-eNB suspends the S1-AP connection with the MME, and the s-eNB suspends the S1-AP connection with the MME after receiving the indication message;
  • the indication message is further used to indicate that the s-eNB deletes the connection information of the S1-AP connection with the MME, and the s-eNB deletes the connection information of the S1-AP connection with the MME after receiving the indication message;
  • the indication message is further used to indicate that the s-eNB reserves the S1-AP connection with the MME, and then the s-eNB reserves the S1-AP connection with the MME after receiving the indication message.
  • the method may further include:
  • the s-eNB suspends the S1-AP connection with the MME, and the first request message sent to the MME may also be used to request the MME to delete the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB. Or suspend the S1-AP connection with the s-eNB;
  • the s-eNB deletes the connection information of the S1-AP connection with the MME, and the first request message sent to the MME may also be used to request the MME to delete the connection information of the S1-AP connection with the s-eNB;
  • the s-eNB reserves the S1-AP connection with the MME, and the first request message sent to the MME may also be used to request the MME to reserve the S1-AP connection with the s-eNB.
  • the s-eNB suspends or deletes the S1-AP connection with the MME.
  • the UE is in the target state and is in the ECM idle state.
  • the method may further include:
  • the s-eNB receives the paging message sent by the MME, where the paging message includes the paging identifier of the UE and the indication that the UE is in the target state. Then, after receiving the paging message, the s-eNB checks whether the s-eNB checks according to the indication. The paging identifier of the UE is saved; if the paging identifier of the UE is saved, the s-eNB establishes an S1-AP connection with the MME; if the paging identifier of the UE is not saved, the s-eNB discards the paging message.
  • the fifth aspect of the embodiment of the present invention discloses an eNB, where the eNB may include a transceiver module, a processing module, and the like, and may be used to implement the UE management method disclosed in the fourth aspect.
  • a sixth aspect of the embodiments of the present invention discloses another eNB, where the eNB may include a transceiver, a processor, and the like, where the transceiver corresponds to the transceiver module of the eNB disclosed in the fifth aspect, and the processor corresponds to the eNB disclosed in the fifth aspect.
  • the processing module can be used to execute the management method of the UE disclosed in the fourth aspect.
  • a seventh aspect of the embodiments of the present invention discloses a method for managing a UE, which is applied to a UE, and the method may include:
  • the UE may send a first request message to the MME, where the first request message is used to request the UE to enter the target state, and after receiving the first request message, the MME initiates a first process according to the first request message, so that the UE The UE enters the target state.
  • the target state there is an RRC connection between the UE and the s-eNB, there is no DRB, and there is no S1-U bearer of the UE between the s-eNB and the SGW.
  • the method may further include: before the UE sends the first request message to the MME, if the UE is in the ECM connection state, the method may further include:
  • the UE detects that the UE has no data transmission in the first time period; the manner in which the UE sends the first request message to the MME may be specifically:
  • the UE sends a first request message to the MME via the s-eNB.
  • the UE may send the first request message to the MME, which may be:
  • the UE sends a first request message to the MME if the V2X service needs to be transmitted.
  • the first request message may be an extended service request, where the extended service request includes an indication that the S1-U bearer and the DRB need not be established for the UE. logo.
  • the method further Can include:
  • the UE may release the DRB with the s-eNB according to the configuration message.
  • the method may further include:
  • the UE receives the first information sent by the s-eNB, where the first information is used to notify the UE to enter the target state.
  • the UE may send a first request message for requesting the UE to enter the target state if there is no data transmission for a long time; if the UE is in the ECM idle state, the UE may have the V2X In the case of a service transmission demand, a first request message for requesting the UE to enter the target state is sent to the MME. After receiving the request message, the MME initiates a first process to bring the UE into the target state. Therefore, the UE has an RRC connection with the base station in the target state, but there is no DRB, and there is no S1-U bearer of the UE between the eNB and the SGW.
  • the UE needs to be in the RRC connected state when performing the V2X service, and in the case that the serving base station of the UE changes, only the context of the UE needs to be transmitted between the source base station and the target base station, and the DRB does not need to be re-established.
  • the SGW is also not required to modify the S1-U bearer of the UE, so that the signaling load of the UE in the ECM connection state during the handover process can be reduced.
  • the eighth aspect of the embodiment of the present invention discloses a UE, which may include a transceiver module, a processing module, and the like, and may be used to implement the UE management method disclosed in the seventh aspect.
  • a ninth aspect of the embodiment of the present invention discloses another UE, where the UE may include a transceiver, a processor, and the like, and the transceiver corresponds to the transceiver module of the UE disclosed in the eighth aspect, and the processor corresponds to the UE disclosed in the eighth aspect.
  • the processing module can be used to implement the management method of the UE disclosed in the seventh aspect.
  • FIG. 1 is a schematic structural diagram of an EPS system according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for managing a UE according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another UE management method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a handover process of a UE in a target state according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart diagram of still another method for managing a UE according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart diagram of still another method for managing a UE according to an embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart of another UE handover process in a target state according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of another handover process of a UE in a target state according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an MME according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another MME according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of an eNB according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of another eNB according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a UE according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another UE according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of a management system of a UE according to an embodiment of the present invention.
  • the embodiment of the invention discloses a method for managing a user terminal and related devices, which can reduce the signaling load of the network. The details are described below separately.
  • FIG. 1 is a schematic structural diagram of an EPS system according to an embodiment of the present invention.
  • EPC Evolved Packet Core
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Internet Internet
  • the EPC is composed of a Mobility Management Entity (MME), a Serving Gateway (SGW), and a Packet Data Network Gateway (Packet Data Network Gateway).
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • Packet Data Network Gateway Packet Data Network Gateway
  • the MME is responsible for the signaling processing part of the EPC
  • the SGW is responsible for the data processing part of the EPC
  • the PGW is responsible for connecting with the Internet
  • the E-UTRAN is mainly composed of the UE and the base station (eNode B, eNB), and the UE may include but not
  • the vehicle is limited to the vehicle, the bus, the bicycle, the electric vehicle, and the like, and the GPS vehicle positioning terminal, the in-vehicle entertainment terminal, the in-vehicle information terminal, and the like, which are not limited in the embodiment of the present invention
  • the Internet may include a car network, etc., and may specifically include a peer entity. (Peer Entity, PE), such as an application server.
  • PE peer Entity
  • the main functions of the MME are to support non-access stratum (NAS) signaling and its security, tracking area (TA) list management, PGW and SGW selection, cross-MME switching.
  • the MME selection, user authentication, roaming control, and bearer management are performed.
  • the SGW is a gateway that terminates at the E-UTRAN interface. Its main function is to act as a local anchor point when performing inter-eNB handover, and assist in completing the reordering function of the eNB.
  • the PGW is a gateway that terminates on the SGi interface for the Packet Data Network (PDN). Its main functions include user-based packet filtering, lawful interception, UE IP address allocation, and service-based uplink and downlink rate control. Wait.
  • the functions of the eNB may include: Radio Resource Management (RRM), Internet Protocol (IP) header compression and user data stream encryption, MME selection when the UE is attached, and paging information scheduling. Transmission, scheduling transmission of broadcast information, setting and providing measurements of the eNB, and the like.
  • RRM Radio Resource Management
  • IP Internet Protocol
  • MME Mobility Management
  • paging information scheduling Transmission, scheduling transmission of broadcast information, setting and providing measurements of the eNB, and the like.
  • a Radio Bearer is established between the UE and the eNB, including a Signaling Radio Bearer (SRB) and a Data Radio Bearer (DRB), where the SRB is used.
  • the signaling is transmitted between the UE and the eNB, such as RRC signaling, and the DRB is used to transmit data between the UE and the eNB.
  • the SRB is divided into SRB0, SRB1, and SRB2 according to different bearer signaling.
  • the SRB0 carries the RRC signaling before the establishment of the RRC connection; the SRB1 carries the RRC signaling (possibly carrying some NAS signaling) and the NAS signaling before the establishment of the SRB2; the SRB2 carries the NAS signaling, and the priority of the SRB2 is lower than the SRB1.
  • SRB2 can be established after the mode is completed.
  • An S1 bearer is set up between the eNB and the SGW, such as a user plane interface (S1User, S1-U) bearer; an S1 interface application protocol (S1-AP) connection is established between the eNB and the MME.
  • S1User user plane interface
  • S1-AP S1 interface application protocol
  • an S5/S8 bearer is established between the SGW and the PGW, and an external bearer, that is, a bearer of the Gi interface, is established between the PGW and the Internet to implement data information interaction with the Internet.
  • An EPS bearer can also be established between the UE and the PGW, and an end-to-end service is established between the UE and the PE.
  • FIG. 2 is a schematic flowchart diagram of a UE management method according to an embodiment of the present invention. As shown in FIG. 2, the management method of the UE may include the following steps:
  • the MME receives the first request message.
  • the first request message is used to request that the UE enter the target state.
  • the first request message may be sent by the UE to the MME, or may be sent to the MME by the source base station s-eNB of the UE, which is not limited in the embodiment of the present invention.
  • the so-called requesting MME to make the UE enter the target state refers to the first process of the MME to initiate the UE to the target state after receiving the first request message.
  • the first request message may be sent by the s-eNB to the MME when the UE has no data transmission in the first time period; or the s-eNB may detect that the UE has no data transmission in the second time period. Send it to the MME.
  • the first time period may be preset by the UE, or may be configured by the s-eNB to the UE, and the second time period may be preset by the s-eNB, or may be adjusted in real time by the s-eNB according to the network load condition.
  • the second time period may be the same as the first time period, or may be different, and is not limited by the embodiment of the present invention. If the UE is in the ECM idle state in the MME, the UE may directly send a first request message to the MME when it has a V2X service transmission request, requesting to configure it as a target state.
  • the target state there is an RRC connection between the UE and the s-eNB, but there is no DRB, and there is no S1-U bearer between the s-eNB and the SGW.
  • the absence of the S1-U bearer between the s-eNB and the SGW can be understood as: the S1-U bearer context of the UE is deleted between the s-eNB and the SGW, or the S1-U bearer of the UE between the s-eNB and the SGW is Inactive state.
  • the first request message may be a new message that is defined, or may be an existing message, and the existing message carries an identifier or an indication for requesting the UE to enter the target state, which is not limited in the embodiment of the present invention.
  • the s-eNB sends a UE Context Release Request to the MME, it carries a special cause value, which is used to request that the UE enter the target state.
  • the target state may be referred to as an RRC-connected light mode.
  • the MME initiates a first process according to the first request message to enable the UE to enter a target state.
  • the MME after receiving the first request message, the MME initiates a first process according to the first request message, so that the UE enters a target state, and after the first process is completed, the UE can enter the target. status. If the UE is in the ECM connection state, the MME initiates the first process to enable the UE to enter the target state, which is coordinated by the MME, the s-eNB, the SGW, and the UE. If the UE is in the ECM idle state, the MME initiates the first process to enable the UE. The entry target state is completed by the MME, the s-eNB, and the UE.
  • the UE will be in the target state.
  • the UE can perform V2X services.
  • the target state if the serving base station of the UE changes, in the process of handover of the base station, only the context of the UE needs to be transmitted between the s-eNB and the target base station t-eNB.
  • the MME after receiving the request message for requesting the UE to enter the target state, the MME initiates a first process to bring the UE into the target state, so that the UE is in the target state and the base station.
  • the UE needs to be in the RRC connected state when performing the V2X service, and in the case that the serving base station of the UE changes, only the context of the UE needs to be transmitted between the source base station and the target base station, and the DRB does not need to be re-established.
  • the SGW is also not required to modify the S1-U bearer of the UE, so that the signaling load of the UE in the ECM connection state during the handover process can be reduced.
  • FIG. 3 is a schematic flowchart diagram of another UE management method according to an embodiment of the present invention.
  • the management method of the UE may include the following steps:
  • the UE enters a connection state by using an attach or a service request, and the s-eNB acquires V2X related information of the UE from a context of the UE.
  • the UE enters a connected state through an Attach procedure or a service request, where the connected state refers to being in an ECM connected state in the MME.
  • the s-eNB may obtain V2X related information of the UE from the context of the UE.
  • the V2X related information may include V2X capability information and the like, which is not limited in the embodiment of the present invention.
  • the s-eNB detects that the UE has no data transmission in the second time period.
  • the s-eNB detects that the UE is performing V2X services.
  • the inactive timer when the s-eNB detects that the UE does not have uplink and downlink data transmission, the inactive timer is started. When the inactive timer expires, the timer is timed to obtain that the UE has no uplink and downlink data transmission.
  • the s-eNB detects whether the V2X-related information is included in the context of the UE. If the V2X-related information is included, it indicates that the UE is a V2X terminal and the V2X service is in progress.
  • the s-eNB sends a first request message to the MME.
  • the s-eNB after determining that the UE has no data transmission in the second time period, and the UR is performing the V2X service, the s-eNB generates a first request message, and sends the first request message to the MME.
  • the first request message is used to request that the UE enter a target state, which may be referred to as an RRC-connected light mode or an RRC-CONNECTED but ECM-IDLE state.
  • the MME receives the first request message, and sends a second request message to the SGW.
  • the MME after receiving the first request message, the MME sends a second request message to the SGW, where the second request message is used to request the SGW to delete the S1-U bearer of the UE.
  • the second request message may specifically be a Release Access Bearers Request.
  • the SGW receives the second request message, and deletes the S1-U bearer of the UE with the s-eNB.
  • the SGW after receiving the second request message, deletes the S1-U bearer of the UE with the s-eNB.
  • the SGW returns a response message of the second request message to the MME.
  • the SGW after the SGW deletes the S1-U bearer of the UE between the s-eNB, The response message of the second request message is returned to the MME, and specifically, a Release Access Bearers Response (Release Access Bearers Response) may be released.
  • a Release Access Bearers Response Release Access Bearers Response
  • the MME receives the response message of the second request message, and sends an indication message to the s-eNB.
  • the MME after receiving the response message of the second request message, the MME sends an indication message to the s-eNB, where the indication message is used to indicate that the s-eNB deletes the information about the SGW in the context of the UE, and Instructing the s-eNB to configure the UE to release the DRB with the s-eNB.
  • the related information of the SGW may include, but is not limited to, an IP address of the SGW and a Tunnel Endpoint Identifier (TEID) of the S1-U.
  • TEID Tunnel Endpoint Identifier
  • the S1-AP connection suspend response is not limited in the embodiment of the present invention.
  • the s-eNB receives the indication message, and deletes related information of the SGW in the context of the UE.
  • the s-eNB sends a configuration message for releasing the DRB to the UE.
  • the s-eNB after receiving the indication message, deletes the related information of the SGW in the context of the UE according to the indication message, and sends a configuration message for releasing the DRB to the UE, where the configuration message may be RRC. Connection Reconfiguration.
  • the configuration message is used to indicate that the UE releases the DRB with the s-eNB, and the s-eNB may be all related information of the SGW in the context of deleting the UE, or may be part of related information for deleting the SGW.
  • the embodiment is not limited.
  • the UE receives the configuration message, and releases the DRB between the s-eNB and the s-eNB.
  • the UE may release the DRB with the s-eNB according to the configuration message, and the UE enters the target state.
  • the UE may also send a response message of the configuration message to the s-eNB to notify the s-eNB that the DRB release of the UE is complete, and then the s-eNB is receiving.
  • the response message of the indication message may be returned to the MME, where the response message of the indication message is used to indicate that the related information of the SGW has been deleted and The DRB release between the UE and the s-eNB is completed.
  • the indication message sent by the MME to the s-eNB may further carry the first information, where the first information is used to notify the UE to enter the target state. That is, after receiving the indication message, the s-eNB The first information is forwarded to the UE, thereby notifying the UE to enter the target state.
  • the s-eNB may carry the first information when transmitting the configuration message to the UE, and may also send the first information to the UE separately, which is not limited in the embodiment of the present invention.
  • the s-eNB may suspend the S1-AP connection with the MME and carry it in the first request message before detecting that the UE is performing the V2X service, before sending the first request message to the MME.
  • MME UE S1 AP ID S1-AP connection identifier
  • the MME may delete the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB or suspend the S1-AP connection with the s-eNB after receiving the first request message; After receiving the response message of the indication message returned by the s-eNB, deleting the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB or suspending the S1-AP connection with the s-eNB In this way, the state of the UE is inconsistent with the state recorded by the MME when the UE is configured to enter the target state, which is not limited in the embodiment of the present invention.
  • the s-eNB suspends the S1-AP connection with the MME, and the MME deletes the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB or suspends the connection information.
  • the UE enters the ECM idle state by the ECM connected state in the MME.
  • suspension means that the s-eNB stores the connection information of the S1-AP connection, but the S1-AP connection is in an inactive state.
  • the s-eNB may also delete the connection information of the S1-AP connection with the MME before sending the first request message to the MME, and in the first request message, before detecting that the UE is performing the V2X service.
  • the MME may delete the connection information of the S1-AP connection with the s-eNB after receiving the first request message; or may delete the S1 of the s-eNB after receiving the response message of the indication message returned by the s-eNB.
  • the connection information of the AP connection which can prevent the state of the UE from being inconsistent with the state recorded by the MME when the UE is configured to enter the target state, which is not limited in the embodiment of the present invention.
  • the UE After the s-eNB deletes the connection information of the S1-AP connection with the MME, and the MME deletes the connection information of the S1-AP connection with the s-eNB, the UE enters by the ECM connection state in the MME. ECM idle state.
  • the s-eNB may also maintain an S1-AP connection with the MME before transmitting the first request message to the MME, and carry the first request message for the UE to perform the V2X service.
  • the MME is requested to reserve an S1-AP connection with the s-eNB.
  • the MME may reserve the S1-AP connection with the s-eNB after receiving the first request message, or may reserve the S1-AP with the s-eNB after receiving the response message of the indication message returned by the s-eNB.
  • the connection is not limited in the embodiment of the present invention.
  • the UE is still in the ECM connection state in the MME.
  • FIG. 4 is a schematic diagram of a handover process of a UE in a target state according to an embodiment of the present invention.
  • the application scenario in the flow diagram shown in FIG. 4 is that the UEs in the ECM connected state switch between cells under different base stations.
  • the handover process includes:
  • the UE sends a Measurement Report to the s-eNB.
  • the s-eNB selects a target cell for the UE according to the measurement report, and checks the context of the UE, and the s-eNB determines that the UE is in the target state according to the context of the UE and is in the ECM connection state in the MME, and determines the s-eNB.
  • the X2 interface-based handover is supported between the target base station t-eNB to which the target cell belongs, and then the following steps are performed.
  • 14) ⁇ 16) is a normal handover procedure, that is, the t-eNB configures resources of the target cell for the UE, and then the UE accesses the target cell.
  • the t-eNB After the UE accesses the target cell, the t-eNB sends a path switch request (PathSwitchRequest) to the MME, and the request does not carry the E-RABs Swiched in Downlink list.
  • the MME After receiving the path switching request that does not carry the E-RABs Swiched in Downlink list, the MME only updates the S1-AP bearer of the UE, so that the S1-U bearer of the UE is not updated.
  • the MME After completing the update of the S1-AP bearer of the UE, the MME returns a path switch response (PathSwitch Ack) to the t-eNB.
  • PathSwitch Ack path switch response
  • the t-eNB After receiving the Path Switch Ack, the t-eNB notifies the s-eNB to release the UE context, thereby completing the cell handover of the UE.
  • the MME needs to update the S1-U bearer of the UE, and the present invention
  • the embodiment does not need to update the S1-U bearer of the UE while supporting the V2X service.
  • the first request message may be sent by the s-eNB to the MME.
  • the MME initiates the first process to bring the V2X capable UE into the target state.
  • the MME does not need to update the S1-U bearer of the UE during the handover process, so that the signaling load on the network side can be reduced to some extent. Further, the UE is in the target state, and can also meet the delay requirement of the V2X service.
  • FIG. 5 is a schematic flowchart diagram of still another method for managing a UE according to an embodiment of the present invention.
  • the management method of the UE may include the following steps:
  • the UE in the ECM connection state detects that the UE has no data transmission in the first time period.
  • the UE has the V2X capability, and when the UE is in the connected state (in the RRC connection state in the s-eNB and in the ECM connection state in the MME), if there is no uplink and downlink data transmission, the target state timing is started. For example, the light mode timer, when the light mode timer expires, that is, the timer counts that the UE has no uplink and downlink data transmission for the first time period, the UE generates a first request message.
  • the UE sends a first request message to the s-eNB.
  • the UE sends the first request message to the s-eNB, where the first request message is used to request that the UE enter the target state.
  • the UE enters the light connection state, or is RRC-CONNECTED but ECM_IDLE state; the first request message may also be a new message that is defined, which is not limited in the embodiment of the present invention.
  • the s-eNB receives the first request message, and forwards the first request message to the MME.
  • the s-eNB after receiving the first request message, forwards the first request message to the MME.
  • 504-510 are the same as 305-311, and are not described in detail in the embodiments of the present invention.
  • the UE may also send a response message of the configuration message to the s-eNB to notify the s-eNB that the DRB release of the UE is complete, and then the s-eNB is receiving.
  • the response message of the indication message may be returned to the MME, where the response message of the indication message is used to indicate that the related information of the SGW has been deleted and The DRB release between the UE and the s-eNB is completed.
  • the indication message sent by the MME to the s-eNB may further carry the first information, where the first information is used to notify the UE to enter the target state. That is, after receiving the indication message, the s-eNB forwards the first information to the UE, thereby notifying the UE to enter the target state.
  • the MME may also delete connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB or suspend the S1-AP with the s-eNB. Connected and instructs the s-eNB to suspend the S1-AP connection with the MME.
  • the indication may be sent by the MME to the s-eNB separately, or may be carried in the indication message sent to the s-eNB, which is not limited in the embodiment of the present invention.
  • the s-eNB suspends the S1-AP connection with the MME, and the MME deletes the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB or suspends the connection information.
  • the UE enters the ECM idle state by the ECM connected state in the MME.
  • the MME may also delete the connection information of the S1-AP connection with the s-eNB, and instruct the s-eNB to delete the connection information of the S1-AP connection with the MME.
  • the UE After the s-eNB deletes the connection information of the S1-AP connection with the MME, and the MME deletes the connection information of the S1-AP connection with the s-eNB, the UE enters by the ECM connection state in the MME. ECM idle state.
  • the MME may also reserve an S1-AP connection with the s-eNB, and instruct the s-eNB to reserve an S1-AP connection with the MME.
  • the UE is still in the ECM connection state in the MME.
  • the MME initiates the E- After the RAB Set up request message is used to re-establish the E-RAB on the eNB, the eNB configures the DRB for the UE through the RRC Connection Reconfiguration. After receiving the response message sent by the eNB, the MME notifies the SGW to restore the downlink bearer of the S1-U of the UE. If the UE needs to send uplink data, it sends an extended service request to the MME.
  • the MME After receiving the extended service request, the MME re-establishes the E-RAB on the eNB through the E-RAB set up request message, and the eNB passes the The radio bearer establishment process configures the DRB for the UE. After receiving the response message sent by the eNB, the MME notifies the SGW to restore the downlink bearer of the S1-U of the UE.
  • the first request message may be sent by the UE to the MME via the s-eNB.
  • the MME will initiate a first procedure to bring the V2X capable UE into the target state. After the UE enters the target state, if the serving base station of the UE changes, the MME does not need to update the S1-U bearer of the UE during the handover process, so that the signaling load on the network side can be reduced to some extent. Further, the UE is in the target state, and can also meet the delay requirement of the V2X service.
  • FIG. 6 is a schematic flowchart diagram of still another method for managing a UE according to an embodiment of the present invention.
  • the management method of the UE may include the following steps:
  • the UE in the ECM idle state sends an extended service request to the MME if there is a V2X service transmission requirement.
  • the V2X-capable UE sends a first request message to the MME if the V2X service needs to be transmitted, and the first request message is specifically sent by the camping base station to the MME.
  • the extension server request may carry an identifier, such as an inactive flag, which is used to indicate that the UE is in a target state, and does not need to establish an S1-U bearer and a DRB for the UE.
  • the MME receives the extended service request, and obtains V2X related information of the UE from a context of the UE.
  • the MME may first The UE performs the identity verification, and specifically, the V2X related information of the UE is obtained from the context information of the UE. If the V2X related information is obtained, indicating that the UE has the V2X capability, the third request message is sent to the MME.
  • the V2X related information may include but is not limited to V2X capability information, V2X quality of service QoS information, and the like.
  • the MME sends a third request message to the s-eNB.
  • the MME after acquiring the V2X related information of the UE, the MME sends a third request message to the s-eNB, where the third request message may be an Initial Context Setup Request.
  • the third request message includes V2X related information of the UE, and is used to request the s-eNB to establish a V2X related context for the UE.
  • the third request message does not carry the E-RAB to be set up list.
  • the s-eNB receives the third request message, and establishes a V2X related context for the UE.
  • the s-eNB after receiving the third request message, the s-eNB obtains V2X related information of the UE. Then, the s-eNB establishes the context for the UE according to the third request message, and also informs the UE that the context of the UE has been obtained through the RRC connection reconfiguration process, and the UE enters the target state, and performs the V2X service in the target state. transmission.
  • the MME since the extended service request includes an indication that the S1-U bearer and the DRB are not required to be established for the UE, the MME does not establish an S1-U bearer for the UE after receiving the extended service request, and the s-eNB Nor will the DRB be configured for this UE.
  • the third request message sent by the MME to the s-eNB may further include first information, where the first information is used to notify the UE to enter a target state.
  • the s-eNB may also send the first information to the UE, thereby notifying that the UE has entered the target state.
  • the first information may be carried in the RRC connection reconfiguration message, or may be independent of the RRC connection reconfiguration message, which is not limited in the embodiment of the present invention.
  • the SGW sends a downlink service transmission notification of the UE to the MME.
  • the SGW has the downlink data service of the UE
  • the downlink service transmission notification of the UE is sent to the MME, and the MME receives the downlink service transmission notification of the UE.
  • the MME receives the downlink service transmission notification of the UE. If the UE is in the target state and is in the ECM idle state, the MME sends a paging paging message to the eNB managed by the MME.
  • the MME after receiving the downlink service transmission notification of the UE, the MME first checks the context of the UE, and if it is determined that the UE is in the ECM idle state in the MME, and the UE is in the target state, then A paging message is sent to all base stations managed by the MME.
  • the paging message may include a paging identifier of the UE, and an indication for indicating that the UE is in a target state.
  • the paging identifier may include an S-Temporary Mobile Subscriber Identity (S-TMSI) or an International Mobile Subscriber Identity (IMSI), etc.; the indication is used to indicate that the paging message is received.
  • S-TMSI S-Temporary Mobile Subscriber Identity
  • IMSI International Mobile Subscriber Identity
  • all the base stations managed by the MME mainly refer to all base stations in the Tracking Area List (TA list) to which the UE belongs.
  • TA list Tracking Area List
  • the s-eNB receives the paging message and checks whether a paging identifier of the UE is saved.
  • the eNB that receives the paging message if it is an s-eNB, can check whether the same paging identifier exists. If the same paging identifier exists, it indicates that the s-eNB holds the paging identifier of the UE; if the same paging identifier does not exist, it indicates that the s-eNB does not store the paging identifier of the UE.
  • the s-eNB establishes an S1-AP connection with the MME.
  • the s-eNB holds the paging identifier of the UE, it indicates that the UE is in the network covered by the s-eNB, and the s-eNB will establish an S1-AP connection with the MME, so that the UE will exit the target state. This makes it possible to transfer data.
  • the s-eNB discards the paging message.
  • the s-eNB does not save the paging identifier of the UE, it indicates that the UE is not in the network covered by the s-eNB, and the s-eNB will discard the paging message.
  • FIG. 7 is a schematic diagram of another UE handover process in a target state according to an embodiment of the present invention.
  • the application scenario in the flow diagram shown in FIG. 7 is that the UEs in the ECM idle state switch between cells under different base stations.
  • the handover process includes:
  • the UE sends a Measurement Report to the s-eNB.
  • the s-eNB selects a target cell for the UE according to the measurement report, and checks the context of the UE at the same time.
  • the s-eNB determines that the UE is in the target state according to the context of the UE and is in the ECM idle state in the MME, and determines that the X2 interface-based handover is supported between the s-eNB and the target base station t-eNB to which the target cell belongs, then The following steps will be performed.
  • the t-eNB After receiving the handover request of the UE, the t-eNB sends a Handover Request Ack to the s-eNB if it agrees that the UE switches to the target cell.
  • the s-eNB After receiving the Handover Request Ack, the s-eNB notifies the UE of the access information of the target cell by using an RRC reconfiguration message.
  • the UE After acquiring the access information of the target cell, the UE accesses the t-eNB through an RRC reconfiguration message.
  • the t-eNB After completing the cell handover of the UE, the t-eNB notifies the s-eNB to release the UE context.
  • the UE in the ECM idle state sends a Path Switch Request to the MME after the handover is completed, to notify the MME that the serving base station of the UE has changed.
  • the MME After receiving the Path Switch Request that has changed the serving base station of the UE, the MME also sends a Modify Bearer Request to the SGW to request the SGW to modify the S1_U bearer of the UE, and after receiving the Modify Bearer Response of the SGW, the MME The t-eNB returns the Path Switch Request Ack.
  • the UE is in the target state, and the S1-U bearer of the UE does not exist between the MME and the SGW, so when the base station handover based on the X1 interface is performed, the SGW that does not need the SGW to update the UE is required. Hosted.
  • FIG. 8 is a schematic diagram of another process of handover of a UE in a target state according to an embodiment of the present invention.
  • the application scenario in the flow diagram shown in FIG. 8 is that the UEs in the ECM idle state switch between cells under different base stations.
  • the handover process includes:
  • the UE sends a Measurement Report to the s-eNB.
  • the s-eNB selects a target cell for the UE according to the measurement report, and checks the context of the UE, and the s-eNB determines that the UE is in the target state according to the context of the UE and is in the ECM idle state in the MME, and determines s-
  • the s-MME transmits the context of the UE to the t-MME to which the t-eNB belongs, and sends the t-MME to the t-eNB.
  • the t-eNB After the t-eNB prepares the resource, it replies with a handover confirmation message, and sends it to the s-eNB via the t-MME and the s-MME.
  • the s-eNB configures the resources of the target cell to the UE by using an RRC reconfiguration message.
  • the UE returns an RRC reconfiguration complete message to the t-eNB, and indicates that the t-MME handover is completed.
  • the s-MME After a period of time after the handover is completed, the s-MME notifies the s-eNB to release the context of the UE.
  • the UE in the ECM idle state returns the RRC reconfiguration complete message to the t-eNB during the handover process, and indicates that the t-MME handover is completed, and the t-MME further sends a Modify Bearer Request to the SGW.
  • the SGW is requested to modify the S1_U bearer of the UE, and the T-eNB's IP address and the domain TEID are sent to the SGW, and the TAU process is performed after the t-MME receives the Modify Bearer Response of the SGW.
  • the MME when the UE is in the ECM idle state, if the UE has a V2X service transmission requirement, the MME initiates a first process to bring the UE into the target state. After the UE enters the target state, if the serving base station of the UE changes, the MME does not need to send a Modify Bearer Request to the SGW during the handover process, and the SGW is not required to modify the S1-U bearer of the UE, thereby being able to reduce to a certain extent. Signaling load on the network side during handover. Further, the UE is in the target state, and can also meet the delay requirement of the V2X service.
  • FIG. 9 is a schematic structural diagram of an MME according to an embodiment of the present invention.
  • the MME 900 can include a transceiver module 901 and a processing module 902, where:
  • the transceiver module 901 is configured to receive a first request message, where the first request message is used to request that the UE enter a target state.
  • the processing module 902 is configured to initiate a first process according to the first request message to enable the UE to enter a target state.
  • the RRC connection exists between the UE and the s-eNB in the target state, but the DRB does not exist. There is also no S1-U bearer between the s-eNB and the SGW. Then, when the serving base station of the UE changes, only the context of the UE needs to be transmitted between the s-eNB and the t-eNB, and the S1-U bearer of the UE does not need to be updated.
  • the specific manner in which the transceiver module 901 receives the first request message may include:
  • Manner 1 In the case that the UE is in the ECM connection state, receiving the first request message sent by the s-eNB when the UE has no data transmission in the first time period.
  • Manner 2 The first request message sent by the s-eNB when detecting that the UE has no data transmission in the second time period and the UE is performing V2X service, when the UE is in the ECM connection state.
  • Manner 3 When the UE is in an ECM idle state, receiving a first request message sent by the UE when there is a V2X service transmission requirement.
  • processing module 902 initiates the first process according to the first request message to enable the UE to enter the target state may be:
  • the control transceiver module 901 sends a second request message to the SGW, where the second request message is used to request the SGW to delete the S1 of the UE.
  • -U bearer
  • the control transceiver module 901 receives the response message of the second request message sent by the SGW;
  • the control transceiver module 901 sends an indication message to the s-eNB, so that the s-eNB deletes the information about the SGW in the context of the UE after receiving the indication message, and configures the UE to release the DRB with the s-eNB. .
  • the above manner is applied to a scenario in which a UE in an ECM connected state is configured as a target state.
  • processing module 902 initiates the first process to enable the UE to enter the target state according to the first request message may also be:
  • the first request message is an extended service request
  • the extended service request includes an identifier for indicating that the S1-U bearer and the DRB are not required to be established for the UE, acquiring the UE from the context of the UE V2X related information.
  • the above manner is applied to a scenario in which a UE in an ECM idle state is configured as a target state.
  • the indication message sent by the transceiver module 901 to the s-eNB may carry the first information, where the first information is used to notify the UE to enter the target state.
  • the transceiver module 901 may further receive a response message of the indication message sent by the s-eNB, where the response message of the indication message is used to indicate that the s-eNB has deleted related information of the SGW, and the UE and the UE The DRB release between the s-eNBs is completed.
  • the processing module 902 may also delete the S1- except the MME UE S1 AP ID of the s-eNB.
  • the connection information of the AP connection, or suspending the S1-AP connection with the s-eNB, and instructing the s-eNB to suspend the S1-AP connection with the MME 900. Suspended refers to the connection information that retains the S1-AP connection, but the S1-AP connection is inactive. At this time, the UE is in the ECM idle state in the MME 900.
  • the processing module 902 may also delete the connection information of the S1-AP connection with the s-eNB, and instruct the s-eNB to delete the S1 with the MME 900.
  • - Connection information for the AP connection At this time, the UE is in the ECM idle state in the MME 900.
  • the processing module 902 may also reserve an S1-AP connection with the s-eNB and instruct the s-eNB to reserve the S1-AP connection with the MME 900. . At this time, the UE is still in the ECM connection state in the MME 900.
  • the s-eNB may suspend before sending the first request message or sending a response message indicating the message.
  • the processing module 902 deletes the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB after receiving the response message of the first request message or the indication message. Or suspend the S1-AP connection with the s-eNB. At this time, the UE is in the ECM idle state in the MME 900.
  • the s-eNB may delete the connection information of the S1-AP connection with the MME 900 before sending the first request message or sending the response message of the indication message. Then, after receiving the first request message or the response message indicating the message, the processing module 902 also deletes the connection information of the S1-AP connection with the s-eNB. At this time, the UE is in the ECM idle state in the MME 900.
  • the s-eNB may reserve the S1-AP connection with the MME 900 before sending the first request message or sending the response message of the indication message, then the processing module The 902 may also maintain an S1-AP connection with the s-eNB after receiving the first request message or the response message indicating the message. At this time, the UE is in the ECM connection state in the MME 900.
  • the transceiver module 901 can also receive the downlink service transmission notification of the UE sent by the SGW. If the UE is in the target state and is in the ECM idle state in the MME 900, the paging message is further sent to all the eNBs managed by the MME 900, and the paging message includes the paging identifier of the UE and an indication that the UE is in the target state. The indication is used to indicate that the eNB that receives the paging message checks whether the paging identifier of the UE is saved.
  • FIG. 10 is a schematic structural diagram of another MME according to an embodiment of the present invention.
  • the MME 1000 can include a transceiver 1001 and a processor 1002, wherein:
  • the transceiver 1001 is configured to receive a first request message, where the first request message is used to request that the UE enter a target state.
  • the processor 1002 is configured to initiate a first process according to the first request message to bring the UE into a target state.
  • the target state there is an RRC connection between the UE and the s-eNB, but there is no DRB, and there is no S1-U bearer between the s-eNB and the SGW. Then, when the serving base station of the UE changes, only the context of the UE needs to be transmitted between the s-eNB and the t-eNB, and the S1-U bearer of the UE does not need to be updated.
  • the specific manner in which the transceiver 1001 receives the first request message may include:
  • Manner 1 In the case that the UE is in the ECM connection state, receiving the first request message sent by the s-eNB when the UE has no data transmission in the first time period.
  • Manner 2 The first request message sent by the s-eNB when detecting that the UE has no data transmission in the second time period and the UE is performing V2X service, when the UE is in the ECM connection state.
  • Manner 3 When the UE is in an ECM idle state, receiving a first request message sent by the UE when there is a V2X service transmission requirement.
  • the specific manner in which the processor 1002 initiates the first process according to the first request message to enable the UE to enter the target state may be:
  • the control transceiver 1001 sends a second request message to the SGW, where the second request message is used to request the SGW to delete the S1 of the UE.
  • -U bearer
  • the control transceiver 1001 sends an indication message to the s-eNB, so that the s-eNB deletes the information about the SGW in the context of the UE after receiving the indication message, and configures the UE to release the s-eNB.
  • the DRB between.
  • the above manner is applied to a scenario in which a UE in an ECM connected state is configured as a target state.
  • the specific manner in which the processor 1002 initiates the first process to enable the UE to enter the target state according to the first request message may also be:
  • the first request message is an extended service request
  • the extended service request includes an identifier for indicating that the S1-U bearer and the DRB are not required to be established for the UE, acquiring the UE from the context of the UE V2X related information.
  • the above manner is applied to a scenario in which a UE in an ECM idle state is configured as a target state.
  • the indication message sent by the transceiver 1001 to the s-eNB may carry the first information, where the first information is used to notify the UE to enter the target state.
  • the transceiver 1001 may further receive a response message of the indication message sent by the s-eNB, where the response message of the indication message is used to indicate that the s-eNB has deleted related information of the SGW, and the UE and the s-eNB The DRB release is complete.
  • the processor 1002 may also delete the connection with the S1-AP connection of the s-eNB other than the MME UE S1 AP ID.
  • the processor 1002 may also delete the connection information of the S1-AP connection with the s-eNB, and instruct the s-eNB to delete and Connection information of the S1-AP connection of the MME 1000.
  • the UE is in the ECM idle state in the MME 1000.
  • the processing module 902 may also reserve an S1-AP connection with the s-eNB and instruct the s-eNB to reserve the S1 with the MME 1000. -AP connection. At this time, the UE is still in the ECM connection state in the MME 1000.
  • the s-eNB may suspend the S1-AP with the MME 1000 before sending the first request message or before sending the response message indicating the message.
  • the processor 1002 deletes the connection information of the S1-AP connection other than the MME UE S1 AP ID of the s-eNB after receiving the first request message or the response message of the indication message, or suspends S1-AP connection of the s-eNB.
  • the UE is in the ECM in the MME 1000. Idle state.
  • the s-eNB may delete the S1-AP connection with the MME 1000 before sending the first request message or before sending the response message indicating the message.
  • the processor 1002 deletes the connection information of the S1-AP connection with the s-eNB after receiving the first request message or the response message indicating the message.
  • the UE is in the ECM idle state in the MME 1000.
  • the s-eNB may reserve the S1-AP connection with the MME 1000 before sending the first request message or before sending the response message indicating the message. Then, after receiving the first request message or the response message indicating the message, the processor 1002 also reserves the S1-AP connection with the s-eNB. At this time, the UE is in the ECM connection state in the MME 1000.
  • the transceiver 1001 may further receive a downlink service transmission notification of the UE that is sent by the SGW. If the UE is in the target state and is in the ECM idle state in the MME 1000, the paging message is further sent to all the eNBs managed by the MME 1000.
  • the paging message includes a paging identifier of the UE and an indication that the UE is in a target state. The indication is used to indicate that the eNB that receives the paging message checks whether the paging identifier of the UE is saved.
  • the MME after receiving the request message for requesting the UE to enter the target state, the MME initiates a first process to bring the UE into the target state, so that the UE is in the target state.
  • There is an RRC connection with the base station but there is no DRB, and there is no S1-U bearer of the UE between the base station and the SGW.
  • the UE needs to perform the V2X service in real time through the RRC connection, and in the case that the serving base station of the UE changes, only the context of the UE needs to be transmitted between the source base station and the target base station, and the DRB does not need to be re-established.
  • the SGW needs to modify the S1-U bearer of the UE, so that the signaling load of the UE in the RRC connected state during the handover process can be reduced.
  • FIG. 11 is a schematic structural diagram of an eNB according to an embodiment of the present invention.
  • the eNB 1100 can include a transceiver module 1101 and a processing module 1102, where:
  • the transceiver module 1101 is configured to send a first request message to the MME, where the first request message is sent Used to request that the UE enter the target state.
  • the target state there is an RC connection between the UE and the eNB 1100, but there is no DRB, and there is no S1-U bearer of the UE between the eNB 1100 and the SGW.
  • the processing module 1102 is configured to: when the MME initiates the first process according to the first request message, to enable the UE to enter the target state, if the serving base station of the UE changes, the transceiver module 1101 and the t-eNB are controlled to be transmitted.
  • the context of the UE is configured to: when the MME initiates the first process according to the first request message, to enable the UE to enter the target state, if the serving base station of the UE changes, the transceiver module 1101 and the t-eNB are controlled to be transmitted.
  • the context of the UE is configured to: when the MME initiates the first process according to the first request message, to enable the UE to enter the target state, if the serving base station of the UE changes, the transceiver module 1101 and the t-eNB are controlled to be transmitted.
  • the SGW is not required to update the S1-U bearer of the UE during the handover procedure.
  • the transceiver module 1101 may further, after sending the first request message, receive an indication message that is sent by the MME for the first request message, where the indication message is used to indicate that the eNB 1100 deletes the information about the SGW in the context of the UE, and configures The UE releases the DRB with the eNB 1100.
  • the processing module 1102 may also delete related information of the SGW according to the indication message, and configure the UE to release the DRB with the eNB 1100.
  • the indication message is sent to the eNB 1100 after the MME requests the SGW to delete the S1-U bearer of the UE according to the first request message, and receives the response message of the SGW.
  • the indication message received by the transceiver module 1101 may carry the first information, where the first information is used to notify the UE to enter the target state. Further, the transceiver module 1101 further sends the first information to the UE to notify the UE to enter a target state.
  • the transceiver module 1101 may further send a response message of the indication message to the MME, where the response message of the indication message is used to indicate that the related information of the SGW has been deleted and the DRB release between the UE and the eNB 1100 is completed.
  • the first request message sent by the transceiver module 1101 to the MME may be the first request message sent by the UE, where the first request message is sent to the eNB1100 when the UE has no data transmission in the first time period.
  • the first request message sent by the transceiver module 1101 to the MME may be generated by the processing module 1102, when detecting that the UE has no data transmission in the second time period, and the UE is performing V2X services.
  • the processing module 1102 may also suspend the S1-AP connection with the MME.
  • the MME side has deleted the connection information of the S1-AP connection other than the MME UE S1 AP ID of the eNB 1100 or suspends the S1-AP connection with the eNB 1100.
  • the UE is The MME is in an ECM idle state.
  • the processing module 1102 may also delete the connection information of the S1-AP connection with the MME, and the MME at this time The connection information of the S1-AP connection with the eNB 1100 has been deleted on the side. At this time, the UE is in the ECM idle state in the MME.
  • the processing module 1102 may also maintain the S1-AP connection with the MME, and the MME side also retains the eNB1100. S1-AP connection. At this time, the UE is still in the ECM connection state in the MME.
  • the processing module 1102 may also suspend the S1-AP connection with the MME, and then the first request message sent by the transceiver module 1101. Or the response message of the indication message may also be used to request the MME to delete the connection information of the S1-AP connection other than the MME UE S1 AP ID of the eNB1100 or suspend the S1-AP connection with the eNB1100. In this way, the UE in the ECM connected state can be configured to the ECM idle state.
  • the processing module 1102 may also delete the connection information of the S1-AP connection with the MME, and then the first request message or the indication message sent by the transceiver module 1101.
  • the response message may also be used to request the MME to delete the connection information of the S1-AP connection with the eNB1100. In this way, the UE in the ECM connected state can be configured to the ECM idle state.
  • the transceiver module 1101 reserves the S1-AP connection with the MME before sending the first request message or the response message indicating the message, and the first request message or the response message of the indication message sent by the transceiver module 1101 can also be It is used to request the MME to reserve an S1-AP connection with the eNB1100. This way the UE can still be in the ECM connected state.
  • the transceiver module 1101 may further receive a paging message sent by the MME, where the UE is in the target state and is in the ECM idle state, and the paging message includes the paging identifier of the UE and the indication that the UE is in the target state.
  • the processing module 1102 can then check whether the eNB 1100 holds the paging identifier of the UE according to the indication. If it is determined that the paging identifier of the UE is saved, the processing module 1102 controls the transceiver module 1101 to establish an S1-AP connection with the MME. If the UE is not saved The paging module, the processing module 1102, discards the paging message.
  • FIG. 12 is a schematic structural diagram of another eNB according to an embodiment of the present invention.
  • the eNB 1200 can include a transceiver 1201 and a processor 1202, wherein:
  • the transceiver 1201 is configured to send a first request message to the MME, where the first request message is used to request that the UE enter a target state.
  • the target state there is an RC connection between the UE and the eNB 1200, but there is no DRB, and there is no S1-U bearer of the UE between the eNB 1200 and the SGW.
  • the processor 1202 is configured to control, between the transceiver 1201 and the t-eNB, if the MME initiates the first process according to the first request message to bring the UE into the target state, if the serving base station of the UE changes.
  • the context of the UE is configured to control, between the transceiver 1201 and the t-eNB, if the MME initiates the first process according to the first request message to bring the UE into the target state, if the serving base station of the UE changes.
  • the context of the UE is configured to control, between the transceiver 1201 and the t-eNB, if the MME initiates the first process according to the first request message to bring the UE into the target state, if the serving base station of the UE changes.
  • the SGW is not required to update the S1-U bearer of the UE during the handover procedure.
  • the transceiver 1201 may further, after sending the first request message, receive an indication message that is sent by the MME for the first request message, where the indication message is used to indicate that the eNB 1200 deletes the information about the SGW in the context of the UE, and configures The UE releases the DRB with the eNB 1200.
  • the processor 1202 may also delete the related information of the SGW according to the indication message, and configure the UE to release the DRB with the eNB 1200.
  • the indication message is sent to the eNB 1200 after the MME requests the SGW to delete the S1-U bearer of the UE according to the first request message, and receives the response message of the SGW.
  • the indication message received by the transceiver 1201 may carry the first information, where the first information is used to notify the UE to enter the target state. Further, the transceiver 1201 also sends the first information to the UE to notify the UE to enter a target state.
  • the transceiver 1201 may further send a response message of the indication message to the MME, where the response message of the indication message is used to indicate that the related information of the SGW has been deleted and the DRB release between the UE and the eNB 1200 is completed.
  • the first request message sent by the transceiver 1201 to the MME may be that the first request message sent by the UE is received, where the first request message is sent by the UE to the eNB 1200 when there is no data transmission in the first time period.
  • the first request message sent by the transceiver 1201 to the MME may also be the processor 1202. It is generated when it is detected that the UE has no data transmission in the second time period and the UE is performing V2X service.
  • the processor 1202 may also suspend the S1-AP connection with the MME.
  • the MME side has deleted the connection information of the S1-AP connection other than the MME UE S1 AP ID of the eNB 1200 or suspends the S1-AP connection with the eNB 1200.
  • the UE is in the ECM idle state in the MME.
  • the processor 1202 may also delete the connection information of the S1-AP connection with the MME, and the MME at this time The connection information of the S1-AP connection with the eNB 1200 has been deleted on the side. At this time, the UE is in the ECM idle state in the MME.
  • the processor 1202 may also maintain the S1-AP connection with the MME, and the MME side also retains the eNB1200 with the eNB. S1-AP connection. At this time, the UE is still in the ECM connection state in the MME.
  • the processor 1202 may also suspend the S1-AP connection with the MME, and then the first request message sent by the transceiver 1201.
  • the response message of the indication message may be used to request the MME to delete the connection information of the S1-AP connection other than the MME UE S1 AP ID of the eNB 1200 or suspend the S1-AP connection with the eNB1200. In this way, the UE in the ECM connected state can be configured to the ECM idle state.
  • the processor 1202 may also delete the connection information of the S1-AP connection with the MME, and then the first request message or the indication message sent by the transceiver 1201.
  • the response message may also be used to request the MME to delete the connection information of the S1-AP connection with the eNB1200. In this way, the UE in the ECM connected state can be configured to the ECM idle state.
  • the transceiver 1201 reserves the S1-AP connection with the MME before sending the first request message or the response message indicating the message, and the first request message or the response message indicating the message sent by the transceiver 1201 may also be Used to request the MME to reserve the S1-AP with the eNB1200 connection. This way the UE can still be in the ECM connected state.
  • the transceiver 1201 may further receive a paging message sent by the MME, where the UE is in the target state and is in the ECM idle state, and the paging message includes the paging identifier of the UE and the indication that the UE is in the target state.
  • the processor 1202 can thereby check whether the eNB 1200 stores the paging identifier of the UE according to the indication. If it is determined that the paging identity of the UE is saved, the processor 1202 controls the transceiver 1201 to establish an S1-AP connection with the MME. If the paging identifier of the UE is not saved, the processor 1202 discards the paging message.
  • the eNB may send a first request message for requesting the UE to enter the target state to the MME under the request that the UE in the ECM connection state has no data transmission for a long time.
  • the MME initiates a first process to bring the UE into the target state.
  • the eNB deletes the related information of the SGW according to the indication, and configures the UE to release the DRB, so that the UE has an RRC connection with the base station in the target state, but there is no DRB, and the eNB and the SGW do not.
  • the UE needs to be in the RRC connected state when performing the V2X service, and in the case that the serving base station of the UE changes, only the context of the UE needs to be transmitted between the source base station and the target base station, and the DRB does not need to be re-established.
  • the SGW is also not required to modify the S1-U bearer of the UE, so that the signaling load of the UE in the ECM connection state during the handover process can be reduced.
  • FIG. 13 is a schematic structural diagram of a UE according to an embodiment of the present invention.
  • the UE 1300 may include a transceiver module 1301 and a processing module 1302, where:
  • the transceiver module 1301 is configured to send a first request message to the MME, where the first request message is used to request that the UE 1300 enter a target state. Then, after receiving the first request message, the MME initiates a first process to bring the UE 1300 into the target state.
  • the target state there is an RRC connection between the UE 1300 and the s-eNB, but there is no DRB, and there is no S1-U bearer of the UE 1300 between the s-eNB and the SGW.
  • the UE 1300 does not need to update the S1-U bearer of the UE 1300 during the handover process.
  • the processing module 1302 may first detect that the UE 1300 has no data transmission for more than the first time period. If the first time period is exceeded, the processing module 1302 notifies the transceiver module 1301, and the transceiver module 1301 sends the first to the s-eNB. The request message, the s-eNB will forward the first request message to the MME.
  • the transceiver module 1301 sends the first request message to the MME.
  • the first request message may be an extended service request, and the extended service request may include an identifier for indicating that the S1-U bearer and the DRB are not required to be established for the UE 1300.
  • the transceiver module 1301 can also receive a configuration message sent by the s-eNB, where the configuration message is used to instruct the UE 1300 to release the DRB.
  • the processing module 1302 releases the DRB with the s-eNB according to the configuration message.
  • the transceiver module 1301 may further receive first information sent by the s-eNB, where the first information is used to notify the UE 1300 to enter a target state.
  • the first information may be carried in the configuration message, which is not limited in the embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of another UE according to an embodiment of the present invention.
  • the UE 1400 can include a transceiver 1401 and a processor 1402, wherein:
  • the transceiver 1401 is configured to send a first request message to the MME, where the first request message is used to request that the UE 1400 enter a target state. Then, after receiving the first request message, the MME initiates a first process to bring the UE 1400 into the target state.
  • the target state there is an RRC connection between the UE 1400 and the s-eNB, but there is no DRB, and there is no S1-U bearer of the UE 1400 between the s-eNB and the SGW.
  • the UE 1400 does not need to update the S1-U bearer of the UE 1400 during the handover process.
  • the processor 1402 may first detect that the UE 1300 has no data transmission for more than the first time period. If the first time period is exceeded, the processing module 1302 The transceiver 1401 is notified, and the transceiver 1401 sends a first request message to the s-eNB, and the s-eNB forwards the first request message to the MME.
  • the transceiver 1401 sends the first request message to the MME.
  • the first request message may be an extended service request, and the extended service request may include an identifier for indicating that the S1-U bearer and the DRB are not required to be established for the UE 1400.
  • the transceiver 1401 can also receive a configuration message sent by the s-eNB, where the configuration message is used to instruct the UE 1400 to release the DRB.
  • the processor 1402 releases the DRB with the s-eNB according to the configuration message.
  • the transceiver 1401 may further receive first information sent by the s-eNB, where the first information is used to notify the UE 1400 to enter a target state.
  • the first information may be carried in the configuration message, which is not limited in the embodiment of the present invention.
  • the UE if the UE is in the ECM connection state, the UE sends a first request message for requesting the UE to enter the target state to the MME without data transmission for a long time. If the UE is in the ECM idle state, the UE sends a first request message for requesting the UE to enter the target state to the MME if there is a V2X service transmission requirement. After receiving the request message, the MME initiates a first process to bring the UE into the target state. Therefore, the UE has an RRC connection with the base station in the target state, but there is no DRB, and there is no S1-U bearer of the UE between the eNB and the SGW.
  • the UE needs to be in the RRC connected state when performing the V2X service, and in the case that the serving base station of the UE changes, only the context of the UE needs to be transmitted between the source base station and the target base station, and the DRB does not need to be re-established.
  • the SGW is also not required to modify the S1-U bearer of the UE, so that the signaling load of the UE in the ECM connection state during the handover process can be reduced.
  • FIG. 15 is a schematic structural diagram of a UE management system according to an embodiment of the present invention.
  • the system may include a UE 151, an s-eNB 152, an MME 153, an SGW 154, and a t-eNB 155, where:
  • the UE 151 and the s-eNB 152 are connected through a Uu interface, and the s-eNB 152 and the t-eNB 155 are connected to the MME 153 through an S1 interface, and the s-eNB 152 and the t-eNB 155 and the SGW 154 are also connected through an S1 interface, and the s-eNB 152 and t are connected.
  • the eNBs 155 are connected through an X2 interface, and the MME 153 The SGWs 154 are connected through an S11 interface.
  • the UE 151 may send a first request message to the MME 153, where the first request message is used to request the UE 151 to enter the target state.
  • the UE 151 may also send a first request message to the MME 153 in the case of being in the ECM connection state and having no data transmission for a long time.
  • the s-eNB 152 may also transmit a first request message to the MME 153 upon detecting that the UE 151 in the ECM connected state has no data transmission for a long time.
  • the MME 153 After receiving the first request message, the MME 153 initiates a first process to bring the UE 151 into the target state.
  • the target state there is an RRC connection between the UE 151 and the s-eNB 152, but there is no DRB, and there is no S1-U bearer of the UE 151 between the s-eNB 152 and the SGW 154.
  • the serving base station of the UE 151 changes, only the context of the UE 151 needs to be transferred between the s-eNB 152 and the t-eNB 155, and the SGW 154 is not required to update the S1-U bearer of the UE 151.
  • the first process is that the SGW 154 needs to delete the S1-U bearer of the UE 151 with the s-eNB 152; the s-eNB 152 also needs to delete the information about the SGW 154 from the context of the UE 151; The UE 151 also needs to delete the DRB with the s-eNB 152.
  • the first process only needs the s-eNB 152 to establish a V2X-related context for the UE 151, and does not need to establish the S1-U bearer of the UE 151 between the s-eNB 152 and the SGW 154, and does not need s.
  • the eNB 152 configures the DRB for the UE 151.
  • the MME after receiving the request message for requesting the UE to enter the target state, the MME initiates a first process to bring the UE into the target state, so that the UE is in the target state.
  • There is an RRC connection with the base station but there is no DRB, and there is no S1-U bearer of the UE between the base station and the SGW.
  • the UE needs to perform the V2X service in real time through the RRC connection, and in the case that the serving base station of the UE changes, only the context of the UE needs to be transmitted between the source base station and the target base station, and the DRB does not need to be re-established.
  • the SGW needs to modify the S1-U bearer of the UE, so that the signaling load of the UE in the RRC connected state during the handover process can be reduced.
  • the modules in the MME, the eNB, and the UE in the embodiment of the present invention may be combined, divided, and deleted according to actual needs.
  • the MME, the eNB, and the UE in the embodiment of the present invention may be implemented by a general-purpose integrated circuit, such as a CPU (Central Processing Unit) or an ASIC (Application Specific Integrated Circuit).
  • a CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开了一种用户终端的管理方法及相关设备，其中，该方法可以包括：MME在接收到用于请求使UE进入目标状态的第一请求消息后，可以发起第一过程以使该UE进入目标状态。在目标状态下，UE与源基站之间存在RRC连接，但不存在DRB，源基站与服务网关之间也不存在该UE的S1-U承载。这样既可以满足UE在进行V2X业务时需要处于RRC连接态的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于ECM连接态的UE在切换过程中网络侧的信令负荷。

Description

一种用户终端的管理方法及相关设备 技术领域
本发明实施例涉及移动通信技术领域，具体涉及一种用户终端的管理方法及相关设备。
背景技术
车联网是以车内网、车际网和车载移动互联网为基础，按照约定的通信协议和数据交互标准，在车与外界(Vehicle to X，V2X)之间，进行无线通讯和信息交换的大系统网络，能够实现智能化交通管理、智能动态信息服务和车辆智能化控制。其中，X包括车、路、行人及互联网等。
在车联网中，用户终端(User Equipment，UE)在进行V2X数据业务时，核心网侧，即演进型分组系统(Evolved Packet System，EPS)主要有两种资源调度方式，基站统一调度资源和UE从基站侧获取的资源池中自主选择资源。其中，在基站统一调度资源的方式下，UE需要一直处于无线资源控制(Radio Resource Control，RRC)连接态，这样才能保证在需要发送V2X消息时，UE能够及时从基站侧申请资源，以满足V2X消息发送的时延要求。
在现有技术中，在UE处于RRC连接态时，一般也处于演进型分组系统连接管理(Evolved Packet System Connection management，ECM)连接态，而当UE处于ECM连接态时，一旦服务小区变更，就会触发切换。考虑到车辆的高移动性，在进行V2X业务时，UE的服务小区必然会频繁发生变化，从而会导致频繁的切换。而在切换过程中网络侧会产生大量信令，这就会给网络造成严重的信令负荷。
发明内容
本发明实施例公开了一种用户终端的管理方法及相关设备，能够减小网络的信令负荷。
本发明实施例第一方面公开了一种用户终端UE的管理方法，应用于移动管理实体MME，该方法可以包括：
MME在接收第一请求消息后，可以根据该第一请求消息发起第一过程以使UE进入目标状态；其中，该第一请求消息用于请求使UE进入目标状态，在目标状态下，UE与源基站s-eNB之间存在RRC连接，不存在数据无线承载DRB，s-eNB与服务网关SGW之间不存在该UE的用户面接口S1-U承载，且在UE的服务基站发生变化的情况下，s-eNB与目标基站t-eNB之间传递该UE的上下文。
MME通过发起第一过程使UE进入目标状态的方式，可以使UE与s-eNB之间存在RRC连接，但是不存在DRB，而s-eNB与SGW之间也不存在该UE的S1-U承载，这样在UE的服务基站发生变化的情况下，s-eNB与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于ECM连接态的UE在切换过程中网络侧的信令负荷。
作为一种可行的实施方式，MME接收第一请求消息具体可以包括：
MME接收由处于ECM连接态的UE在第一时间段内没有数据传输的情况下，经s-eNB发送的第一请求消息；
或者，
MME接收由s-eNB在检测到处于ECM连接态的UE在第二时间段内没有数据传输，且该UE正在进行V2X业务的情况下发送的第一请求消息；
或者，
MME接收由处于ECM空闲态的UE在有V2X业务传输需求的情况下发送的第一请求消息。
作为另一种可行的实施方式，如果该UE处于ECM连接态，那么MME发起的第一过程具体可以包括：
MME在接收第一请求消息后，向SGW发送第二请求消息，其中，该第二请求消息用于请求SGW删除该UE的S1-U承载；MME在接收到SGW发送的该第二请求消息的响应消息后，会向s-eNB发送指示消息，以使s-eNB删除该UE的上下文中该SGW的相关信息，并配置该UE释放与s-eNB之间的DRB。
进一步的，该指示消息可以携带第一信息，该第一信息用于通知该UE进入目标状态。
进一步的，MME在向s-eNB发送指示消息之后，该方法还可以包括：
MME接收s-eNB发送该指示消息的响应消息，其中，该指示消息的响应消 息用于指示该SGW的相关信息已删除且该UE与s-eNB之间的DRB释放完成。
作为又一种可行的实施方式，如果MME接收由处于ECM连接态的UE经s-eNB发送的第一请求消息，那么该方法还可以包括：
MME在接收到第一请求消息后，删除与s-eNB的除在MME中该UE的控制面接口S1-AP连接标识MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与s-eNB的S1-AP连接，并指示s-eNB挂起与MME的S1-AP连接；
或者，
MME在接收到第一请求消息后，删除与s-eNB的S1-AP连接的连接信息，并指示s-eNB删除与MME的S1-AP连接的连接信息；
或者，
MME在接收到第一请求消息后，保留与s-eNB的S1-AP连接，并指示s-eNB保留与MME的S1-AP连接。
可以理解的是，如果s-eNB挂起与该MME的S1-AP连接，且MME删除与该s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或者挂起与该s-eNB的S1-AP连接，或者，如果s-eNB删除与该MME的S1-AP连接的连接信息，且MME删除与该s-eNB的S1-AP连接的连接信息，该UE在MME中由ECM连接态进入ECM空闲态。如果s-eNB保留与该MME的S1-AP连接，且MME也保留与该s-eNB的S1-AP连接，那么该UE在MME中仍然处于ECM连接态。
作为又一种可行的实施方式，如果MME接收由s-eNB发送的第一请求消息，那么该方法还可以包括：
MME可以在接收到第一请求消息后或者在接收到指示消息的响应消息后，删除与s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与s-eNB的S1-AP连接；
或者，
MME可以在接收到第一请求消息后或者在接收到指示消息的响应消息后，删除与s-eNB的S1-AP连接的连接信息；
或者，
MME可以在接收到第一请求消息后或者在接收到指示消息的响应消息后，保留与s-eNB的S1-AP连接。
作为又一种可行的实施方式，如果该UE处于ECM空闲态，那么第一请求消息可以为扩展服务请求，该扩展服务请求包括用于指示无需为该UE建立S1-U承载和DRB的标识，因此，MME发起的第一过程具体可以包括：
MME从该UE的上下文中获取到该UE的V2X相关信息后，可以根据该扩展服务请求向s-eNB发送第三请求消息，其中，该第三请求消息包括该UE的V2X相关信息，该第三请求消息用于请求s-eNB为该UE建立V2X相关的上下文。
作为又一种可行的实施方式，MME根据第一请求消息发起第一过程以使该UE进入目标状态之后，该方法还可以包括：
如有SGW处检测到该UE有下行业务，那么MME会接收到SGW发送的关于该UE的下行业务传输通知；如果此时UE处于目标状态且处于ECM空闲态，那么MME会向该MME所管理的eNB(也即是该UE所属的跟踪区列表TA list内的所有基站)发送寻呼paging消息，其中，该paging消息包括该UE的寻呼标识和该UE处于目标状态的指示，该指示用于指示接收到paging消息的eNB检查是否保存有该UE的寻呼标识。
可见，在UE有下行业务的情况下，MME会向该UE的所属的TA list内的所有基站发送paging消息，接收到paging消息的基站在保存有该UE的寻呼标识的情况下会与MME建立S1-AP连接，从而为UE调度资源。
本发明实施例第二方面公开了一种MME，该MME可以包括收发模块和处理模块等，可以用于执行第一方面公开的UE的管理方法。
本发明实施例第三方面公开了另一种MME，该MME可以包括收发器和处理器等，收发器对应于第二方面公开的MME的收发模块，处理器对应于第二方面公开的MME的处理模块，可以用于执行第一方面公开的UE的管理方法。
本发明实施例第四方面公开了另一种UE的管理方法，应用于s-eNB，该方法可以包括：
s-eNB可以向MME发送第一请求消息，其中，该第一请求消息用于请求使UE进入目标状态，在目标状态下，该UE与s-eNB之间存在RRC连接，不存在DRB，s-eNB与SGW之间不存在该UE的S1-U承载；那么在MME根据第一请求消息发起第一过程以使该UE进入目标状态，且该UE的服务基站发生变化的情况下，s-eNB与t-eNB之间只需传递该UE的上下文，而不需要SGW更新该UE的 S1-U承载。
eNB可以向MME发送用于请求使该UE进入目标状态的第一请求消息，MME在接收到该请求消息后，会发起第一过程以使该UE进入目标状态。在第一过程中，eNB会根据指示删除SGW的相关信息，并配置UE释放DRB，从而使得UE在目标状态下与基站之间存在RRC连接，但是不存在DRB，而eNB与SGW之间也不存在该UE的S1-U承载。这样既可以满足UE在进行V2X业务时需要处于RRC连接态的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于ECM连接态的UE在切换过程中网络侧的信令负荷。
作为一种可行的实施方式，s-eNB向MME发送第一请求消息之后，以及s-eNB与t-eNB之间传递该UE的上下文之前，也就是MME发起第一过程使该UE进入目标状态的过程中，该方法还可以包括：
s-eNB在接收MME针对第一请求消息发送的指示消息后，可以根据giant指示消息删除该UE的上下文中SGW的相关信息，并配置UE释放与s-eNB之间的DRB。其中，该指示消息用于指示s-eNB删除该UE的上下文中SGW的相关信息，并配置UE释放与s-eNB之间的DRB。
进一步的，MME发送的指示消息可以携带第一信息，该第一信息用于通知该UE进入目标状态。
进一步的，s-eNB根据该指示消息删除该UE的上下文中SGW的相关信息，并配置UE释放与s-eNB之间的DRB之后，该方法还可以包括：
s-eNB还可以向MME发送该指示消息的响应消息，其中，该指示消息的响应消息用于指示SGW的相关信息已删除且UE与s-eNB之间的DRB释放完成。
作为另一种可行的实施方式，s-eNB向MME发送第一请求消息之前，该方法还可以包括：
s-eNB接收UE发送的第一请求消息，该第一请求消息由处于ECM连接态的UE在第一时间段内没有数据传输的情况下发送给s-eNB。也就是说，s-eNB在接收到UE发送的第一请求消息后转发给MME。
所述s-eNB检测处于ECM连接态的UE在第二时间段内没有数据传输；
所述s-eNB检测所述UE正在进行V2X业务。
作为又一种可行的实施方式，s-eNB向MME发送第一请求消息之前，该方法还可以包括：
s-eNB检测处于ECM连接态的UE在第二时间段内没有数据传输后，可以检测UE正在进行V2X业务。也就是说，s-eNB在检测到处于ECM连接态的UE在第二时间段内没有数据传输，且该UE正在进行V2X业务的情况下向MME发送的第一请求消息。
作为又一种可行的实施方式，s-eNB接收MME针对第一请求消息发送的指示消息之后，该方法还可以包括：
该指示消息还用于指示s-eNB挂起与MME的S1-AP连接，那么s-eNB在接收到该指示消息后会挂起与MME的S1-AP连接；
或者，
该指示消息还用于指示s-eNB删除与MME的S1-AP连接的连接信息，那么s-eNB在接收到该指示消息后删除与MME的S1-AP连接的连接信息；
或者，
该指示消息还用于指示s-eNB保留与MME的S1-AP连接，那么s-eNB在接收到该指示消息后会保留与MME的S1-AP连接。
作为又一种可行的实施方式，s-eNB检测UE正在进行V2X业务之后，以及s-eNB向MME发送第一请求消息之前，该方法还可以包括：
s-eNB挂起与MME的S1-AP连接，那么向MME发送的第一请求消息还可以用于请求MME删除与s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与s-eNB的S1-AP连接；
或者，
s-eNB删除与MME的S1-AP连接的连接信息，那么向MME发送的第一请求消息还可以用于请求MME删除与s-eNB的S1-AP连接的连接信息；
或者，
s-eNB保留与MME的S1-AP连接，那么向MME发送的第一请求消息还可以用于请求MME保留与s-eNB的S1-AP连接。
作为又一种可行的实施方式，在s-eNB挂起与MME的S1-AP连接或删除与 MME的S1-AP连接的连接信息的情况下，UE处于目标状态且处于ECM空闲态，在有UE的下行业务的请求下，该方法还可以包括：
s-eNB接收MME发送的paging消息，其中，该paging消息包括该UE的寻呼标识和该UE处于目标状态的指示；那么s-eNB在接收到paging消息后会根据该指示检查s-eNB是否保存有该UE的寻呼标识；如果保存有该UE的寻呼标识，s-eNB会与MME建立S1-AP连接；如果没有保存该UE的寻呼标识，s-eNB会丢弃该paging消息。
本发明实施例第五方面公开了一种eNB，该eNB可以包括收发模块和处理模块等，可以用于执行第四方面公开的UE的管理方法。
本发明实施例第六方面公开了另一种eNB，该eNB可以包括收发器和处理器等，收发器对应于第五方面公开的eNB的收发模块，处理器对应于第五方面公开的eNB的处理模块，可以用于执行第四方面公开的UE的管理方法。
本发明实施例第七方面公开了又一种UE的管理方法，应用于UE，该方法可以包括：
UE可以向MME发送第一请求消息，其中，该第一请求消息用于请求使该UE进入目标状态，MME在接收到第一请求消息后，会根据该第一请求消息发起第一过程以使UE进入目标状态。在目标状态下，UE与s-eNB之间存在RRC连接，不存在DRB，s-eNB与SGW之间不存在该UE的S1-U承载。
具体的，如果UE处于ECM连接态，UE向MME发送第一请求消息之前，该方法还可以包括：
UE检测该UE在第一时间段内没有数据传输；那么UE向MME发送第一请求消息的方式具体可以为：
UE经s-eNB向MME发送第一请求消息。
具体的，如果UE处于ECM空闲态，UE向MME发送第一请求消息具体可以为：
UE在有V2X业务传输需求的情况下，向MME发送第一请求消息，该第一请求消息可以为扩展服务请求，该扩展服务请求包括用于指示无需为该UE建立S1-U承载和DRB的标识。
作为一种可行的实施方式，UE向MME发送第一请求消息之后，该方法还 可以包括：
UE在接收到s-eNB发送的用于指示释放DRB的配置消息后，可以根据该配置消息释放与s-eNB之间的DRB。
作为另一种可行的实施方式，UE向MME发送第一请求消息之后，该方法还可以包括：
UE接收s-eNB发送的第一信息，其中，该第一信息用于通知该UE进入目标状态。
如果UE处于ECM连接态，该UE会在长时间没有数据传输的情况下向MME发送用于请求使该UE进入目标状态的第一请求消息；如果UE处于ECM空闲态，该UE会在有V2X业务传输需求的情况下向MME发送用于请求使该UE进入目标状态的第一请求消息。MME在接收到该请求消息后，会发起第一过程以使该UE进入目标状态。从而使得UE在目标状态下与基站之间存在RRC连接，但是不存在DRB，而eNB与SGW之间也不存在该UE的S1-U承载。这样既可以满足UE在进行V2X业务时需要处于RRC连接态的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于ECM连接态的UE在切换过程中网络侧的信令负荷。
本发明实施例第八方面公开了一种UE，该UE可以包括收发模块和处理模块等，可以用于执行第七方面公开的UE的管理方法。
本发明实施例第九方面公开了另一种UE，该UE可以包括收发器和处理器等，收发器对应于第八方面公开的UE的收发模块，处理器对应于第八方面公开的UE的处理模块，可以用于执行第七方面公开的UE的管理方法。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例公开的一种EPS系统的架构示意图；
图2是本发明实施例公开的一种UE的管理方法的流程示意图；
图3是本发明实施例公开的另一种UE的管理方法的流程示意图；
图4是本发明实施例公开的一种UE在目标状态下的切换流程示意图；
图5是本发明实施例公开的又一种UE的管理方法的流程示意图；
图6是本发明实施例公开的又一种UE的管理方法的流程示意图；
图7是本发明实施例公开的另一种UE在目标状态下的切换流程示意图；
图8是本发明实施例公开的又一种UE在目标状态下的切换流程示意图；
图9是本发明实施例公开的一种MME的结构示意图；
图10是本发明实施例公开的另一种MME的结构示意图；
图11是本发明实施例公开的一种eNB的结构示意图；
图12是本发明实施例公开的另一种eNB的结构示意图；
图13是本发明实施例公开的一种UE的结构示意图；
图14是本发明实施例公开的另一种UE的结构示意图；
图15是本发明实施例公开的一种UE的管理系统的结构示意图。
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，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例公开了一种用户终端的管理方法及相关设备，能够减小网络的信令负荷。以下分别进行详细说明。
为了更好的理解本发明实施例公开的一种UE的管理方法及相关设备，下面先对本发明实施例适用的EPS系统架构进行描述。请参阅图1，图1是本发明实施例公开的一种EPS系统架构示意图。在图1所示的架构中，包括演进分组核心网(Evolved Packet Core，EPC)、演进型通用陆基无线接入网(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)和互联网Internet。其中，EPC由移动性管理实体(Mobility Management Entity，MME)、服务网关(Serving Gateway，SGW)、分组数据网网关(PacketDataNetworkGateway， PGW)等组成，MME负责EPC的信令处理部分，SGW负责EPC的数据处理部分，PGW负责与Internet连接；E-UTRAN主要是由UE和基站(eNode B，eNB)组成，UE可以包括但不限于汽车、公交车、自行车、电动车等交通工具，以及GPS车载定位终端、车载娱乐终端、车载信息终端等，本发明实施例不做限定；Internet可以包括车联网等，具体可以包括对等实体(Peer Entity，PE)，如应用服务器。
在EPS系统中，MME的主要功能是支持非接入层(Non-Access Stratum，NAS)信令及其安全、跟踪区域(Tracking Area，TA)列表的管理、PGW和SGW的选择、跨MME切换时进行MME的选择、用户的鉴权、漫游控制以及承载管理等。SGW是终止于E-UTRAN接口的网关，其主要功能是进行eNB间切换时，作为本地锚定点，并协助完成eNB的重排序功能等。PGW是面向分组数据网络(PacketDataNetwork，PDN)终结于SGi接口的网关，其主要功能包括基于用户的包过滤功能、合法侦听功能、UE的IP地址分配功能以及进行基于业务的上下行速率的控制等。eNB的功能可以包括：无线资源管理(Radio Resource Management，RRM)、网络之间的互连协议(Internet Protocol，IP)头压缩及用户数据流加密、UE附着时的MME选择、寻呼信息的调度传输、广播信息的调度传输、设置和提供eNB的测量等。
在EPS系统中，UE与eNB之间建立有无线承载(Radio Bearer，RB)，包括信令无线承载(Signalling Radio Bearer，SRB)和数据无线承载(Data Radio Bearer，DRB)，其中，SRB用于在UE与eNB之间传输信令，如RRC信令，DRB用于在UE与eNB之间传输数据。根据承载的信令不同，SRB分为SRB0、SRB1和SRB2。其中，SRB0承载RRC连接建立之前的RRC信令；SRB1承载RRC信令(可能携带一些NAS信令)和SRB2建立之前的NAS信令；SRB2承载NAS信令，SRB2优先级低于SRB1，在安全模式完成后才能建立SRB2。eNB与SGW之间建立有S1承载，如用户面接口(S1User，S1-U)承载；eNB与MME之间建立有S1接口的应用协议(S1 Application Protocol，S1-AP)连接。SRB与S1-AP连接统称为NAS连接，DRB与S1-U承载统称为E-UTRAN的无线接入承载(E-UTRAN Radio Access Bearer，E-RAB)。
此外，SGW与PGW之间建立有S5/S8承载，PGW与Internet之间建立有外部承载，即Gi接口的承载，实现与Internet之间的数据信息交互。当然， UE与PGW之间也可以之间建立EPS承载，UE与PE之间建立端对端服务(End-to-end Service)。
基于图1所示的EPS系统，本发明实施例公开了一种UE的管理方法。请参阅图2，图2是本发明实施例公开的一种UE的管理方法的流程示意图。如图2所示，该UE的管理方法可以包括以下步骤：
201、MME接收第一请求消息。
本发明实施例中，第一请求消息用于请求使UE进入目标状态。第一请求消息可以由UE发送给MME，也可以由UE的源基站s-eNB发送给MME，本发明实施例不做限定。所谓请求MME使UE进入目标状态，是指MME在收到第一请求消息后，发起使UE进入到目标状态的第一过程。
本发明实施例中，如果UE在MME中处于ECM连接态，在现有技术中，UE必定在s-eNB中处于RRC连接态。因此，第一请求消息可以由UE在第一时间段内没有数据传输的情况下经过s-eNB发送给MME；也可以由s-eNB在检测到UE在第二时间段内没有数据传输的情况下发送给MME。其中，第一时间段可以是UE预先设置的，也可以是s-eNB配置给UE的，第二时间段可以是s-eNB预先设置的，也可以是s-eNB根据网络负载情况实时调整的，第二时间段可以与第一时间段相同，也可以不同，本发明实施例不做限定。如果UE在MME中处于ECM空闲态，UE在有V2X业务传输需求时，可以直接向MME发送第一请求消息，请求将其配置为目标状态。
需要说明的是，在目标状态下，UE与s-eNB之间存在RRC连接，但是不存在DRB，s-eNB与SGW之间也不存在S1-U承载。s-eNB与SGW之间不存在S1-U承载可以理解为：s-eNB与SGW之间删除该UE的S1-U承载上下文，或者s-eNB与SGW之间该UE的S1-U承载为未激活状态。第一请求消息可以是定义的一个新消息，也可以是现有的消息，该现有的消息携带有用于请求使UE进入目标状态的标识或指示，本发明实施例不做限定。例如，s-eNB在向MME发送UE的上下文释放请求(UE Context Release Request)时，携带有特殊原因值，该特殊原因值用于请求使该UE进入目标状态。
具体的，该目标状态可以称为RRC轻连接模式(RRC-connected light mode) 状态，简称轻连接态，或者称为RRC连接但是ECM空闲状态(RRC-CONNECTED but ECM-IDLE state)，本发明实施例不做限定。
202、该MME根据该第一请求消息发起第一过程以使UE进入目标状态。
本发明实施例中，MME在接收到第一请求消息后，就会根据该第一请求消息发起第一过程以使该UE进入目标状态，在第一过程完成后，该UE即可进入到目标状态。其中，如果UE处于ECM连接态，MME发起第一过程以使UE进入目标状态是由MME、s-eNB、SGW以及UE协作完成的，如果UE处于ECM空闲态，MME发起第一过程以使UE进入目标状态是由MME、s-eNB以及UE协作完成的。
那么在第一过程完成后，UE就会处于目标状态。在目标状态下，UE可以进行V2X业务。在目标状态下，如果UE的服务基站发生变化，在切换基站的过程中，仅仅需要s-eNB与目标基站t-eNB之间传递UE的上下文。
可见，在图2所描述的方法中，MME在接收到用于请求使UE进入目标状态的请求消息后，会发起第一过程以使该UE进入目标状态，从而使得UE在目标状态下与基站之间存在RRC连接，但是不存在DRB，而基站与SGW之间也不存在该UE的S1-U承载。这样既可以满足UE在进行V2X业务时需要处于RRC连接态的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于ECM连接态的UE在切换过程中网络侧的信令负荷。
基于图1所示的EPS系统，本发明实施例公开了另一种UE的管理方法。请参阅图3，图3是本发明实施例公开的另一种UE的管理方法的流程示意图。如图3所示，该UE的管理方法可以包括以下步骤：
301、UE通过附着(Attach)或者服务请求(service request)进入连接态，s-eNB从UE的上下文中获取UE的V2X相关信息。
本发明实施例中，UE通过Attach过程或者service request进入连接态，该连接态是指在MME中处于ECM连接态。
本发明实施例中，如果该UE是V2X终端，那么s-eNB就可以从该UE的上下文中获取到该UE的V2X相关信息。该V2X相关信息可以包括V2X能力信息等，本发明实施例不做限定。
302、s-eNB检测UE在第二时间段内没有数据传输。
303、s-eNB检测UE正在进行V2X业务。
本发明实施例中，s-eNB在检测到该UE没有上下行数据传输时，就会启动非活动定时器(inactive timer)，当inactive timer超时，即定时器计时得到该UE没有上下行数据传输所持续的时间达到第二时间段，s-eNB会检测该UE的上下文中是否包含V2X相关信息，如果包含有V2X相关信息，那么表明该UE为V2X终端，正在进行V2X业务。
304、s-eNB向MME发送第一请求消息。
本发明实施例中，s-eNB在确定该UE在第二时间段内没有数据传输，且该UR正在进行V2X业务后，会生成第一请求消息，并将该第一请求消息发送给MME。该第一请求消息用于请求使UE进入目标状态，该目标状态可以称为RRC-connected light mode或者RRC-CONNECTED but ECM-IDLE state。
需要说明的是，第一请求消息可以为UE的上下文释放请求(UE context Release request)，那么在UE context Release request中，可以携带特殊原因值，如cause＝light mode activate，用于请求以使该UE进入轻连接态；该第一请求消息还可以为定义的一个新消息，比如S1-AP连接挂起请求(S1-AP connection suspend request)，本发明实施例不做限定。
305、MME接收该第一请求消息，向SGW发送第二请求消息。
本发明实施例中，MME在接收到第一请求消息后，会向SGW发送第二请求消息，该第二请求消息用于请求SGW删除该UE的S1-U承载。其中，该第二请求消息具体可以为释放无线承载请求(Release Access Bearers Request)。
306、SGW接收第二请求消息，删除与s-eNB之间的该UE的S1-U承载。
本发明实施例中，SGW在接收到第二请求消息后，会删除与该s-eNB之间的该UE的S1-U承载。
307、SGW向MME返回第二请求消息的响应消息。
本发明实施例中，SGW在删除与s-eNB之间的该UE的S1-U承载之后，会 向MME返回该第二请求消息的响应消息，具体可以是释放无线承载响应(Release Access Bearers Response)。
308、MME接收第二请求消息的响应消息，向s-eNB发送指示消息。
本发明实施例中，MME在接收到第二请求消息的响应消息后，会向s-eNB发送指示消息，该指示消息用于指示s-eNB删除该UE的上下文中该SGW的相关信息，并指示s-eNB配置该UE释放与s-eNB之间的DRB。其中，该SGW的相关信息可以包括但不限于SGW的IP地址和S1-U的隧道端点标识TEID(Tunnel Endpoint Identifier)。
具体的，该指示消息可以为UE上下文释放指示(UE context release command)，其中，UE context release command中还可以携带原因值，如cause＝light mode activate，还可以为定义的一个新消息，比如S1-AP连接挂起响应(S1-AP connection suspend response)，本发明实施例不做限定。
309、s-eNB接收该指示消息，删除该UE的上下文中SGW的相关信息。
310、s-eNB向UE发送释放DRB的配置消息。
本发明实施例中，s-eNB在接收到该指示消息后，会根据该指示消息删除该UE的上下文中SGW的相关信息，并向UE发送释放DRB的配置消息，该配置消息具体可以为RRC Connection Reconfiguration。其中，该配置消息用于指示该UE释放与该s-eNB之间的DRB，s-eNB可以是删除该UE的上下文中SGW的所有相关信息，也可以是删除SGW的部分相关信息，本发明实施例不做限定。
311、UE接收该配置消息，释放与s-eNB之间的DRB。
本发明实施例中，该UE在接收到该配置消息后，就可以根据该配置消息释放与s-eNB之间的DRB，UE从而进入目标状态。
优选的，UE在完成释放与s-eNB之间的DRB之后，还可以向s-eNB发送该配置消息的响应消息，用于通知s-eNB该UE的DRB释放完成，那么s-eNB在接收到该配置消息的响应消息，且完成删除该UE的上下文中SGW的相关信息之后，可以向MME返回该指示消息的响应消息，该指示消息的响应消息用于指示SGW的相关信息已删除且该UE与该s-eNB之间的DRB释放完成。
优选的，MME向s-eNB发送的指示消息中，还可以携带有第一信息，该第一信息用于通知该UE进入目标状态。也就是说，s-eNB在接收到该指示消息后， 会将该第一信息转发给该UE，从而通知该UE进入目标状态。
需要说明的是，s-eNB可以是在向该UE发送配置消息时携带该第一信息，也可以单独将第一信息发送给该UE，本发明实施例不做限定。
优选的，s-eNB在检测到UE正在进行V2X业务的情况下，在向MME发送第一请求消息之前，还可以挂起与该MME的S1-AP连接，并在第一请求消息中携带用于请求该MME删除与该s-eNB的除在该MME中该UE的S1-AP连接标识(MME UE S1 AP ID)之外的S1-AP连接的连接信息，或者挂起与该s-eNB的S1-AP连接。那么MME可以在接收到第一请求消息后删除与该s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或者挂起与该s-eNB的S1-AP连接；也可以在接收到s-eNB返回的指示消息的响应消息后删除与该s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或者挂起与该s-eNB的S1-AP连接，这样可以防止在配置UE进入目标状态过程中失败时，UE的状态与MME记录的状态不一致，本发明实施例不做限定。
可以理解的是，在s-eNB挂起与该MME的S1-AP连接，并且MME删除与该s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或者挂起与该s-eNB的S1-AP连接之后，该UE在MME中由ECM连接态进入ECM空闲态。
需要说明的是，挂起是指s-eNB保存了S1-AP连接的连接信息，但S1-AP连接是处于未激活状态。
优选的，s-eNB在检测到UE正在进行V2X业务的情况下，在向MME发送第一请求消息之前，还可以删除与该MME的S1-AP连接的连接信息，并在第一请求消息中携带用于请求该MME删除与该s-eNB的S1-AP连接的连接信息，或者挂起与该s-eNB的S1-AP连接。那么MME可以在接收到第一请求消息后删除与该s-eNB的S1-AP连接的连接信息；也可以在接收到s-eNB返回的指示消息的响应消息后删除与该s-eNB的S1-AP连接的连接信息，这样可以防止在配置UE进入目标状态过程中失败时，UE的状态与MME记录的状态不一致，本发明实施例不做限定。
可以理解的是，在s-eNB删除与该MME的S1-AP连接的连接信息，并且MME删除与该s-eNB的S1-AP连接的连接信息之后，该UE在MME中由ECM连接态进入ECM空闲态。
优选的，s-eNB在检测到UE正在进行V2X业务的情况下，在向MME发送第一请求消息之前，还可以保留与该MME的S1-AP连接，并在第一请求消息中携带用于请求该MME保留与该s-eNB的S1-AP连接。那么MME可以在接收到第一请求消息后会保留与该s-eNB的S1-AP连接；也可以在接收到s-eNB返回的指示消息的响应消息后保留与该s-eNB的S1-AP连接，本发明实施例不做限定。
可以理解的是，如果s-eNB保留与该MME的S1-AP连接，并且MME也保留与该s-eNB的S1-AP连接，那么该UE在MME中仍然处于ECM连接态。
请一并参阅图4，图4是本发明实施例公开的一种UE在目标状态下的切换流程示意图。在图4所示的流程示意图的应用场景为处于ECM连接态的UE在不同基站下的小区之间进行切换。如图4所示，该切换流程包括：
11)UE向s-eNB发送测量报告(Measurement Report)。
12)s-eNB根据测量报告为UE选择一个目标小区，同时检查UE的上下文，s-eNB根据该UE的上下文确定该UE处于目标状态且在MME中处于ECM连接态，并确定出s-eNB与目标小区所属的目标基站t-eNB之间支持基于X2接口的切换，那么就会执行如下步骤。
13)s-eNB向t-eNB发送切换请求(Handover Request)，该请求中不包含E-RAB配置列表，进一步的，该请求中还可以携带新的原因值，即cause＝V2X handover，用于表示该UE具有V2X能力。
14)～16)为正常的切换流程，即t-eNB为该UE配置目标小区的资源，然后UE接入到目标小区。
17)UE在接入到目标小区后，t-eNB会向MME发送路径转换请求(PathSwitchRequest)，该请求中不携带E-RABs Swiched in Downlink list。MME在收到不携带E-RABs Swiched in Downlink list的路径转换请求后，仅仅更新该UE的S1-AP承载，从而不会更新该UE的S1-U承载。
18)MME在完成该UE的S1-AP承载的更新后，会向t-eNB返回路径转换响应(PathSwitch Ack)。
19)t-eNB在接收到Path Switch Ack后，会通知s-eNB释放UE上下文，从而完成了UE的小区切换。
在现有技术中，如果UE处于ECM连接态，且该UE的服务基站发生变化， s-eNB与t-eNB在对该UE进行切换的过程中，由于s-eNB与MME之间存在该UE的S1-U承载，那么MME还需要更新该UE的S1-U承载，而本发明实施例是在支持V2X业务的同时，不需要更新该UE的S1-U承载。
可见，在图3所描述的方法中，在UE处于ECM连接态时，第一请求消息可以是s-eNB发送给MME。MME在发起第一过程以使具有V2X能力的UE进入目标状态后。在UE进入目标状态后，如果该UE的服务基站发生变化，在切换过程中，MME不需要更新该UE的S1-U承载，从而在一定程度上能够减少网络侧的信令负荷。进一步的，该UE处于目标状态下，还可以满足V2X业务的时延要求。
基于图1所示的EPS系统，本发明实施例公开了又一种UE的管理方法。请参阅图5，图5是本发明实施例公开的又一种UE的管理方法的流程示意图。如图5所示，该UE的管理方法可以包括以下步骤：
501、处于ECM连接态的UE检测该UE在第一时间段内没有数据传输。
需要说明的是，UE进入ECM连接态的方式可参见图4中401，本发明实施例不再赘述。
本发明实施例中，该UE具备V2X能力，UE在处于连接态(在s-eNB中处于RRC连接态，在MME中处于ECM连接态)时，如果没有上下行数据传输，会启动目标状态定时器，如light mode timer，当light mode timer超时，即定时器计时得到该UE没有上下行数据传输所持续的时间达到第一时间段，该UE会生成第一请求消息。
502、UE向s-eNB发送第一请求消息。
本发明实施例中，该UE会将该第一请求消息发送给s-eNB，其中，该第一请求消息用于请求使UE进入目标状态。
需要说明的是，第一请求消息可以为PDN的连接中断请求(PDN connection suspend request)，那么在PDN connection suspend request中，可以携带特殊原因值，如cause＝light mode activate，用于请求以使该UE进入轻连接态，或者是RRC-CONNECTED but ECM_IDLE state；该第一请求消息还可以为定义的一个新消息，本发明实施例不做限定。
503、s-eNB接收该第一请求消息，并将该第一请求消息转发给MME。
本发明实施例中，该s-eNB在接收到第一请求消息后，会将该第一请求消息转发给MME。
504～510与305～311相同，本发明实施例不再赘述。
优选的，UE在完成释放与s-eNB之间的DRB之后，还可以向s-eNB发送该配置消息的响应消息，用于通知s-eNB该UE的DRB释放完成，那么s-eNB在接收到该配置消息的响应消息，且完成删除该UE的上下文中SGW的相关信息之后，可以向MME返回该指示消息的响应消息，该指示消息的响应消息用于指示SGW的相关信息已删除且该UE与该s-eNB之间的DRB释放完成。
优选的，MME向s-eNB发送的指示消息中，还可以携带有第一信息，该第一信息用于通知该UE进入目标状态。也就是说，s-eNB在接收到该指示消息后，会将该第一信息转发给该UE，从而通知该UE进入目标状态。
优选的，MME在接收到第一请求消息后，还可以删除与该s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或者挂起与该s-eNB的S1-AP连接，并指示s-eNB挂起与该MME的S1-AP连接。其中，该指示可以是MME单独发送给该s-eNB的，也可以是携带在向该s-eNB发送的指示消息中的，本发明实施例不做限定。
可以理解的是，在s-eNB挂起与该MME的S1-AP连接，并且MME删除与该s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或者挂起与该s-eNB的S1-AP连接之后，该UE在MME中由ECM连接态进入ECM空闲态。
优选的，MME在接收到第一请求消息后，还可以删除与该s-eNB的S1-AP连接的连接信息，并指示s-eNB删除与该MME的S1-AP连接的连接信息。
可以理解的是，在s-eNB删除与该MME的S1-AP连接的连接信息，并且MME删除与该s-eNB的S1-AP连接的连接信息之后，该UE在MME中由ECM连接态进入ECM空闲态。
优选的，MME在接收到第一请求消息后，还可以保留与该s-eNB的S1-AP连接，并指示s-eNB保留与该MME的S1-AP连接。
可以理解的是，如果s-eNB保留与该MME的S1-AP连接，并且MME也保留与该s-eNB的S1-AP连接，那么该UE在MME中仍然处于ECM连接态。
进一步的，该UE在处于目标状态的情况下，如果SGW有该UE的下行数据业务，且该UE此时在MME中处于ECM连接态，该MME在接收到数据业务通知时，会发起E-RAB Set up request消息在eNB上重建E-RAB，那么eNB会通过RRC Connection Reconfiguration为UE配置DRB，MME在接收到eNB发送的响应消息后，会通知SGW恢复该UE的S1-U的下行承载。如果该UE需要发送上行数据，会向MME发送扩展服务请求(extended service request)，MME在收到extended service request后，通过E-RAB set up request消息在eNB上重建E-RAB，eNB则会通过Radio Bearer establishment流程为UE配置DRB，MME在接收到eNB发送的响应消息后，会通知SGW恢复该UE的S1-U的下行承载。
可见，在图5所描述的方法中，在UE处于ECM连接态时，第一请求消息可以是UE经s-eNB发送给MME。MME会发起第一过程以使具有V2X能力的UE进入目标状态。在UE进入目标状态后，如果该UE的服务基站发生变化，在切换过程中，MME不需要更新该UE的S1-U承载，从而在一定程度上能够减少网络侧的信令负荷。进一步的，该UE处于目标状态下，还可以满足V2X业务的时延要求。
基于图1所示的EPS系统，本发明实施例公开了又一种UE的管理方法。请参阅图6，图6是本发明实施例公开的又一种UE的管理方法的流程示意图。如图6所示，该UE的管理方法可以包括以下步骤：
601、处于ECM空闲态的UE在有V2X业务传输需求的情况下，向MME发送扩展服务请求。
本发明实施例中，具有V2X能力的UE如果在有V2X业务传输需求时，会向MME发送第一请求消息，具体可以是通过驻留基站向MME发送第一请求消息，该第一请求消息具体可以为扩展服务请求。其中，该扩展服务器请求可以携带一个标识，如inactive flag，该标识用于指示该UE处于目标状态，不需要为该UE建立S1-U承载和DRB。
602、MME接收该扩展服务请求，从该UE的上下文中获取该UE的V2X相关信息。
本发明实施例中，MME在接收到携带该标识的扩展服务请求后，会先对 该UE进行身份验证，具体可以是从该UE的上下文信息中获取该UE的V2X相关信息。如果获取到该V2X相关信息，表明该UE具备V2X能力，才会向MME发送第三请求消息。其中，该V2X相关信息可以包括但不限于V2X能力信息、V2X的服务质量QoS信息等
603、MME向s-eNB发送第三请求消息。
本发明实施例中，MME在获取到该UE的V2X相关信息后，会向s-eNB发送第三请求消息，该第三请求消息具体可以为Initial Context Setup Request。该第三请求消息包括该UE的V2X相关信息，用于请求s-eNB为该UE建立V2X相关的上下文。该第三请求消息不会携带E-RAB to be set up list。
604、s-eNB接收该第三请求消息，为UE建立V2X相关的上下文。
本发明实施例中，s-eNB在接收到该第三请求消息后，会获取到该UE的V2X相关信息。那么s-eNB在根据该第三请求消息为该UE建立上下文的同时，还会通过RRC连接重配置流程通知UE已经获得了UE的上下文，该UE从而进入目标状态，在目标状态下进行V2X业务传输。
需要说明的是，由于扩展服务请求包括用于指示不需要为该UE建立S1-U承载和DRB，那么MME在接收到扩展服务请求后，不会为该UE建立S1-U承载，s-eNB也不会为该UE配置DRB。
优选的，MME给s-eNB发送的第三请求消息中还可以包括第一信息，该第一信息用于通知该UE进入目标状态。那么s-eNB在接收到该第三请求消息，且通过RRC连接重配置流程通知UE已经获得了UE的上下文后，还可以向该UE发送第一信息，从而通知该UE已进入目标状态。其中，该第一信息可以是携带于RRC连接重配置消息中，也可以是独立于RRC连接重配置消息，本发明实施例不做限定。
605、SGW向MME发送该UE的下行业务传输通知。
本发明实施例中，在该UE处于目标状态后，如果SGW有该UE的下行数据业务，会向MME发送该UE的下行业务传输通知，MME从而会接收到该UE的下行业务传输通知。
606、MME接收该UE的下行业务传输通知，如果该UE处于目标状态且处于ECM空闲态，MME向该MME所管理的eNB发送寻呼paging消息。
本发明实施例中，MME在接收到该UE的下行业务传输通知后，首先会检查该UE的上下文，如果确定该UE此时在MME中处于ECM空闲态，且该UE处于目标状态，那么就会向该MME所管理的所有基站发送paging消息。其中，该paging消息可以包括该UE的寻呼标识，以及用于指示该UE处于目标状态的指示。其中，该寻呼标识可以包括临时身份标识(S-Temporary Mobile Subscriber Identity，S-TMSI)或者国际移动用户识别码(International Mobile Subscriber Identity，IMSI)等；该指示用于指示接收到该paging消息的eNB检查是否保存有该UE的寻呼标识。
可以理解的是，MME所管理的所有基站主要是指该UE所属的跟踪区列表(Tracking Area List，TA list)内的所有基站。
607、s-eNB接收该paging消息，并检查是否保存有该UE的寻呼标识。
本发明实施例中，接收到该paging消息的eNB，假设为s-eNB，可以检查是否存在相同的寻呼标识。如果存在相同的寻呼标识，就表明该s-eNB保存有该UE的寻呼标识；如果不存在相同的寻呼标识，就表明该s-eNB并没有保存有该UE的寻呼标识。
608、如果保存有该UE的寻呼标识，s-eNB与MME建立S1-AP连接。
如果该s-eNB保存有该UE的寻呼标识，就表明该UE在s-eNB所覆盖的网络中，s-eNB从而会与MME建立S1-AP连接，这样该UE就会退出目标状态，从而可以进行数据传输。
609、如果没有保存该UE的寻呼标识，s-eNB丢弃该paging消息。
如果该s-eNB并没有保存该UE的寻呼标识，就表明该UE不在s-eNB所覆盖的网络中，s-eNB从而会丢弃该paging消息。
同样的，UE所属的TA list内的其他基站在接收到该paging消息后，也会执行相同操作，本发明实施例不再赘述。
请一并参阅图7，图7是本发明实施例公开的另一种UE在目标状态下的切换流程示意图。在图7所示的流程示意图的应用场景为处于ECM空闲态的UE在不同基站下的小区之间进行切换。如图7所示，该切换流程包括：
21)UE向s-eNB发送Measurement Report。
22)s-eNB根据测量报告为UE选择一个目标小区，同时检查UE的上下文， s-eNB根据该UE的上下文确定该UE处于目标状态且在MME中处于ECM空闲态，并确定出s-eNB与目标小区所属的目标基站t-eNB之间支持基于X2接口的切换，那么就会执行如下步骤。
23)向t-eNB发送Handover Request，该请求携带新的原因值，例如cause＝ECM IDLE handover，并且该请求中还包括有该UE的上下文信息。
24)t-eNB在接收该UE的切换请求后，如果同意该UE切换到目标小区，会向s-eNB发送Handover Request Ack。
25)s-eNB接收到Handover Request Ack后，会通过RRC重配置消息通知该UE该目标小区的接入信息。
26)UE在获取到目标小区的接入信息后，会通过RRC重配置消息接入到t-eNB。
27)在完成该UE的小区切换后，t-eNB会通知s-eNB释放该UE上下文。
在现有技术中，处于ECM空闲态的UE在切换过程中，t-eNB在完成切换后，还会向MME发送Path Switch Request，以通知MME该UE的服务基站发生了变化。MME在接收到该UE的服务基站发生了变化的Path Switch Request后，还会向SGW发送Modify Bearer Request，以请求SGW修改该UE的S1_U承载，MME在接收到SGW的Modify Bearer Response后，从而向t-eNB返回Path Switch Request Ack。由于本发明实施例中，该UE处于目标状态，MME与SGW之间不存在该UE的S1-U承载，那么在进行基于X1接口的基站切换时，是不需要SGW更新该UE的S1-U承载。
请一并参阅图8，图8是本发明实施例公开的又一种UE在目标状态下的切换流程示意图。在图8所示的流程示意图的应用场景为处于ECM空闲态的UE在不同基站下的小区之间进行切换。如图8所示，该切换流程包括：
31)UE向s-eNB发送Measurement Report。
32))s-eNB根据测量报告为UE选择一个目标小区，同时检查UE的上下文，s-eNB根据该UE的上下文确定该UE处于目标状态且在MME中处于ECM空闲态，并确定出s-eNB与目标小区所属的目标基站t-eNB之间不支持基于X2接口的切换(如s-eNB和t-eNB之间没有X2接口，或者s-eNB和t-eNB不能连接到相同的MME)，那么就会向s-MME发送Handover Request，该请求携带新的原因 值，例如cause＝ECM IDLE handover，该请求中包括该UE的上下文信息
33)～34)s-MME从而将该UE的上下文发送给t-eNB所属的t-MME，由t-MME发送给t-eNB
35)～37)t-eNB准备好资源之后，回复切换确认消息，经由t-MME和s-MME发给s-eNB。
38)s-eNB把目标小区的资源通过RRC重配消息配置给UE。
39)～310)UE给t-eNB回复RRC重配完成消息，同时指示t-MME切换完成。
311)进行跟踪区更新(Tracking Area Update，TAU)流程。
312)～313)切换完成后一段时间，s-MME通知s-eNB释放UE的上下文。
在现有技术中，处于ECM空闲态的UE在切换过程中，UE给t-eNB回复RRC重配完成消息，同时指示t-MME切换完成，t-MME还会向SGW发送Modify Bearer Request，以请求SGW修改该UE的S1_U承载，并将t-eNB的IP地址和域TEID告诉给SGW，在t-MME接收到SGW的Modify Bearer Response后才会进行TAU流程。
可见，在图6所描述的方法中，在UE处于ECM空闲态，如果UE有V2X业务传输需求，MME会发起第一过程以使该UE进入目标状态。在UE进入目标状态后，如果该UE的服务基站发生变化，在切换过程中，MME不需要向SGW发送Modify Bearer Request，不需要SGW修改该UE的S1-U承载，从而在一定程度上能够减少切换过程中网络侧的信令负荷。进一步的，该UE处于目标状态下，还可以满足V2X业务的时延要求。
基于图1所示的EPS系统，本发明实施例公开了一种移动管理实体MME。请参阅图9，图9是本发明实施例公开的一种MME的结构示意图。如图9所示，该MME900可以包括收发模块901和处理模块902，其中：
收发模块901，用于接收第一请求消息，其中，该第一请求消息用于请求使UE进入目标状态。
处理模块902，用于根据该第一请求消息发起第一过程以使UE进入目标状态。
其中，在目标状态下，该UE与s-eNB之间存在RRC连接，但是不存在DRB， s-eNB与SGW之间也不存在S1-U承载。那么当UE的服务基站发生变化时，s-eNB与t-eNB之间只需要传递该UE的上下文，而不需要更新该UE的S1-U承载。
具体实现中，收发模块901接收第一请求消息的具体方式可以包括：
方式一、在UE处于ECM连接态的情况下，接收由UE在第一时间段内没有数据传输的情况下经s-eNB发送的第一请求消息。
方式二、在UE处于ECM连接态的情况下，接收由s-eNB在检测到UE在第二时间段内没有数据传输，且该UE正在进行V2X业务时发送的第一请求消息。
方式三、在UE处于ECM空闲态的情况下，接收由UE在有V2X业务传输需求时发送的第一请求消息。
进一步的，处理模块902根据该第一请求消息发起第一过程以使UE进入目标状态的具体方式可以为：
在UE处于ECM连接态，且在收发模块901接收到第一请求消息的情况下，控制收发模块901向SGW发送第二请求消息，其中，该第二请求消息用于请求SGW删除该UE的S1-U承载；
控制收发模块901接收SGW发送的该第二请求消息的响应消息；
控制收发模块901向s-eNB发送指示消息，这样可以使s-eNB在接收到指示消息后删除该UE的上下文中该SGW的相关信息，并配置该UE释放与该s-eNB之间的DRB。
上述方式应用到将ECM连接态的UE配置为目标状态的场景。
进一步的，处理模块902根据该第一请求消息发起第一过程以使UE进入目标状态的具体方式还可以为：
在UE处于ECM空闲态，第一请求消息为扩展服务请求，且该扩展服务请求包括用于指示无需为UE建立S1-U承载和DRB的标识的情况下，从该UE的上下文中获取该UE的V2X相关信息。
上述方式应用到将ECM空闲态的UE配置为目标状态的场景。
优选的，收发模块901向s-eNB发送的指示消息可以携带第一信息，该第一信息用于通知该UE进入目标状态。
优选的，收发模块901还可以接收s-eNB发送的该指示消息的响应消息，该指示消息的响应消息用于指示s-eNB已删除该SGW的相关信息，且该UE与 s-eNB之间的DRB释放完成。
在一种实现方式中，如果收发模块901接收的第一请求消息是由UE经s-eNB发送的，那么处理模块902还可以删除与s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息，或者挂起与s-eNB的S1-AP连接，并指示s-eNB挂起与MME900的S1-AP连接。其中，挂起是指保留有S1-AP连接的连接信息，但S1-AP连接出于未激活状态。此时UE在MME900中处于ECM空闲态。
如果收发模块901接收的第一请求消息是由UE经s-eNB发送的，那么处理模块902还可以删除与s-eNB的S1-AP连接的连接信息，并指示s-eNB删除与MME900的S1-AP连接的连接信息。此时UE在MME900中处于ECM空闲态。
如果收发模块901接收的第一请求消息是由UE经s-eNB发送的，那么处理模块902还可以保留与s-eNB的S1-AP连接，并指示s-eNB保留与MME900的S1-AP连接。此时UE在MME900中仍然处于ECM连接态。
在另一种实现方式中，如果收发模块901接收的第一请求消息是由s-eNB发送的，s-eNB在发送第一请求消息或者在发送指示消息的响应消息之前，可以先挂起与MME900的S1-AP连接，那么处理模块902在接收到第一请求消息或者指示消息的响应消息之后，也会删除与s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息，或者挂起与s-eNB的S1-AP连接。此时UE在MME900中处于ECM空闲态。
如果收发模块901接收的第一请求消息是由s-eNB发送的，s-eNB在发送第一请求消息或者在发送指示消息的响应消息之前，可以先删除与MME900的S1-AP连接的连接信息，那么处理模块902在接收到第一请求消息或者指示消息的响应消息之后，也会删除与s-eNB的S1-AP连接的连接信息。此时UE在MME900中处于ECM空闲态。
如果收发模块901接收的第一请求消息是由s-eNB发送的，s-eNB在发送第一请求消息或者在发送指示消息的响应消息之前，可以保留与MME900的S1-AP连接，那么处理模块902在接收到第一请求消息或者指示消息的响应消息之后，也会保留与s-eNB的S1-AP连接。此时UE在MME900中处于ECM连接态。
优选的，收发模块901还可以接收SGW发送的该UE的下行业务传输通知， 如果该UE处于目标状态，且在MME900中处于ECM空闲态，会进一步向MME900所管理的所有eNB发送paging消息，该paging消息包括该UE的寻呼标识和该UE处于目标状态的指示。其中，该指示用于指示接收到paging消息的eNB检查是否保存有该UE的寻呼标识。
基于图1所示的EPS系统，本发明实施例公开了另一种MME。请参阅图10，图10是本发明实施例公开的另一种MME的结构示意图。如图10所示，该MME1000可以包括收发器1001和处理器1002，其中：
收发器1001，用于接收第一请求消息，其中，该第一请求消息用于请求使UE进入目标状态。
处理器1002，用于根据该第一请求消息发起第一过程以使UE进入目标状态。
其中，在目标状态下，该UE与s-eNB之间存在RRC连接，但是不存在DRB，s-eNB与SGW之间也不存在S1-U承载。那么当UE的服务基站发生变化时，s-eNB与t-eNB之间只需要传递该UE的上下文，而不需要更新该UE的S1-U承载。
具体实现中，收发器1001接收第一请求消息的具体方式可以包括：
方式一、在UE处于ECM连接态的情况下，接收由UE在第一时间段内没有数据传输的情况下经s-eNB发送的第一请求消息。
方式二、在UE处于ECM连接态的情况下，接收由s-eNB在检测到UE在第二时间段内没有数据传输，且该UE正在进行V2X业务时发送的第一请求消息。
方式三、在UE处于ECM空闲态的情况下，接收由UE在有V2X业务传输需求时发送的第一请求消息。
进一步的，处理器1002根据该第一请求消息发起第一过程以使UE进入目标状态的具体方式可以为：
在UE处于ECM连接态，且在收发器1001接收到第一请求消息的情况下，控制收发器1001向SGW发送第二请求消息，其中，该第二请求消息用于请求SGW删除该UE的S1-U承载；
控制收发器1001接收SGW发送的该第二请求消息的响应消息；
控制收发器1001向s-eNB发送指示消息，这样可以使s-eNB在接收到指示消息后删除该UE的上下文中该SGW的相关信息，并配置该UE释放与该s-eNB之 间的DRB。
上述方式应用到将ECM连接态的UE配置为目标状态的场景。
进一步的，处理器1002根据该第一请求消息发起第一过程以使UE进入目标状态的具体方式还可以为：
在UE处于ECM空闲态，第一请求消息为扩展服务请求，且该扩展服务请求包括用于指示无需为UE建立S1-U承载和DRB的标识的情况下，从该UE的上下文中获取该UE的V2X相关信息。
上述方式应用到将ECM空闲态的UE配置为目标状态的场景。
优选的，收发器1001向s-eNB发送的指示消息可以携带第一信息，该第一信息用于通知该UE进入目标状态。
优选的，收发器1001还可以接收s-eNB发送的该指示消息的响应消息，该指示消息的响应消息用于指示s-eNB已删除该SGW的相关信息，且该UE与s-eNB之间的DRB释放完成。
优选的，如果收发器1001接收的第一请求消息是由UE经s-eNB发送的，那么处理器1002还可以删除与s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息，或者挂起与s-eNB的S1-AP连接，并指示s-eNB挂起与MME1000的S1-AP连接。其中，挂起是指保留有S1-AP连接的连接信息，但S1-AP连接出于未激活状态。此时UE在MME1000中处于ECM空闲态。
优选的，如果收发器1001接收的第一请求消息是由UE经s-eNB发送的，那么处理器1002还可以删除与s-eNB的S1-AP连接的连接信息，并指示s-eNB删除与MME1000的S1-AP连接的连接信息。此时UE在MME1000中处于ECM空闲态。
优选的，如果收发器1001接收的第一请求消息是由UE经s-eNB发送的，那么处理模块902还可以保留与s-eNB的S1-AP连接，并指示s-eNB保留与MME1000的S1-AP连接。此时UE在MME1000中仍然处于ECM连接态。
优选的，如果收发器1001接收的第一请求消息是由s-eNB发送的，s-eNB在发送第一请求消息或者在发送指示消息的响应消息之前，可以先挂起与MME1000的S1-AP连接，那么处理器1002在接收到第一请求消息或者指示消息的响应消息之后，也会删除与s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息，或者挂起与s-eNB的S1-AP连接。此时UE在MME1000中处于ECM 空闲态。
优选的，如果收发器1001接收的第一请求消息是由s-eNB发送的，s-eNB在发送第一请求消息或者在发送指示消息的响应消息之前，可以先删除与MME1000的S1-AP连接的连接信息，那么处理器1002在接收到第一请求消息或者指示消息的响应消息之后，也会删除与s-eNB的S1-AP连接的连接信息。此时UE在MME1000中处于ECM空闲态。
优选的，如果收发器1001接收的第一请求消息是由s-eNB发送的，s-eNB在发送第一请求消息或者在发送指示消息的响应消息之前，可以保留与MME1000的S1-AP连接，那么处理器1002在接收到第一请求消息或者指示消息的响应消息之后，也会保留与s-eNB的S1-AP连接。此时UE在MME1000中处于ECM连接态。
优选的，收发器1001还可以接收SGW发送的该UE的下行业务传输通知，如果该UE处于目标状态，且在MME1000中处于ECM空闲态，会进一步向MME1000所管理的所有eNB发送paging消息，该paging消息包括该UE的寻呼标识和该UE处于目标状态的指示。其中，该指示用于指示接收到paging消息的eNB检查是否保存有该UE的寻呼标识。
可见，在图9或图10所描述的MME中，MME在接收到用于请求使UE进入目标状态的请求消息后，会发起第一过程以使该UE进入目标状态，从而使得UE在目标状态下与基站之间存在RRC连接，但是不存在DRB，而基站与SGW之间也不存在该UE的S1-U承载。这样既可以满足UE通过RRC连接实时进行V2X业务的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于RRC连接态的UE在切换过程中网络侧的信令负荷。
基于图1所示的EPS系统，本发明实施例公开了一种基站eNB。请参阅图11，图11是本发明实施例公开的一种eNB的结构示意图。如图11所示，该eNB1100可以包括收发模块1101和处理模块1102，其中：
收发模块1101，用于向MME发送第一请求消息，其中，该第一请求消息 用于请求使UE进入目标状态。在目标状态下，该UE与eNB1100之间存在RC连接，但不存在DRB，eNB1100与SGW之间也不存在该UE的S1-U承载。
处理模块1102，用于在MME根据该第一请求消息发起第一过程以使该UE进入目标状态的情况下，如果该UE的服务基站发生变化，会控制收发模块1101与t-eNB之间传递该UE的上下文。
因此，在切换过程不需要SGW更新该UE的S1-U承载。
进一步的，收发模块1101还可以在发送第一请求消息后，接收MME针对该第一请求消息发送的指示消息，该指示消息用于指示eNB1100删除该UE的上下文中该SGW的相关信息，并配置该UE释放与eNB1100之间的DRB。
因此，处理模块1102还可以根据该指示消息，删除该SGW的相关信息，并配置该UE释放与eNB1100之间的DRB。
需要说明的是，该指示消息是在MME根据第一请求消息向SGW请求删除该UE的S1-U承载，并接收到SGW的响应消息后发送给eNB1100的。
优选的，收发模块1101接收到的指示消息可以携带有第一信息，该第一信息用于通知该UE进入目标状态。进一步的，收发模块1101还会将该第一信息发送给该UE，以通知该UE进入目标状态。
优选的，收发模块1101还可以向该MME发送该指示消息的响应消息，其中，该指示消息的响应消息用于指示该SGW的相关信息已删除且该UE与eNB1100之间的DRB释放完成。
具体的，收发模块1101向MME发送的第一请求消息可以是接收到UE发送的第一请求消息，该第一请求消息是UE在第一时间段内没有数据传输时发送给eNB1100的。
具体的，收发模块1101向MME发送的第一请求消息还可以是处理模块1102在检测到该UE在第二时间段内没有数据传输，且该UE正在进行V2X业务的情况下生成的。
在一种实现方式中，在收发模块1101接收的指示消息还用于指示eNB1100挂起与MME的S1-AP连接的情况下，处理模块1102还可以挂起与MME的S1-AP连接，此时MME侧已删除与eNB1100的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与eNB1100的S1-AP连接。此时UE在 MME中处于ECM空闲态。
或者，在收发模块1101接收的指示消息还用于指示eNB1100删除与MME的S1-AP连接的连接信息的情况下，处理模块1102还可以删除与MME的S1-AP连接的连接信息，此时MME侧已删除与eNB1100的S1-AP连接的连接信息。此时UE在MME中处于ECM空闲态。
或者，在收发模块1101接收的指示消息还用于指示eNB1100保留与MME的S1-AP连接的情况下，处理模块1102还可以保留与MME的S1-AP连接，此时MME侧也保留有与eNB1100的S1-AP连接。此时UE在MME中仍然处于ECM连接态。
在另一种实现方式中，收发模块1101在发送第一请求消息或者指示消息的响应消息之前，处理模块1102还可以挂起与MME的S1-AP连接，那么收发模块1101发送的第一请求消息或者指示消息的响应消息中还可以用于请求MME删除与eNB1100的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与eNB1100的S1-AP连接。这样就可以将ECM连接态的UE配置到ECM空闲态。
或者，收发模块1101在发送第一请求消息或者指示消息的响应消息之前，处理模块1102还可以删除与MME的S1-AP连接的连接信息，那么收发模块1101发送的第一请求消息或者指示消息的响应消息中还可以用于请求MME删除与eNB1100的S1-AP连接的连接信息。这样就可以将ECM连接态的UE配置到ECM空闲态。
或者，收发模块1101在发送第一请求消息或者指示消息的响应消息之前，处理模块1102保留与MME的S1-AP连接，那么收发模块1101发送的第一请求消息或者指示消息的响应消息中还可以用于请求MME保留与eNB1100的S1-AP连接。这样就可以UE仍然处于ECM连接态。
优选的，在UE处于目标状态且处于ECM空闲态的请求下，收发模块1101还可以接收MME发送的paging消息，该paging消息包括UE的寻呼标识和该UE处于目标状态的指示。处理模块1102从而可以根据该指示检查eNB1100是否保存有该UE的寻呼标识。如果确定保存有该UE的寻呼标识，处理模块1102会控制收发模块1101与MME建立S1-AP连接。如果没有保存该UE的 寻呼标识，处理模块1102会丢弃该paging消息。
基于图1所示的EPS系统，本发明实施例公开了另一种eNB。请参阅图12，图12是本发明实施例公开的另一种eNB的结构示意图。如图12所示，该eNB1200可以包括收发器1201和处理器1202，其中：
收发器1201，用于向MME发送第一请求消息，其中，该第一请求消息用于请求使UE进入目标状态。在目标状态下，该UE与eNB1200之间存在RC连接，但不存在DRB，eNB1200与SGW之间也不存在该UE的S1-U承载。
处理器1202，用于在MME根据该第一请求消息发起第一过程以使该UE进入目标状态的情况下，如果该UE的服务基站发生变化，会控制收发器1201与t-eNB之间传递该UE的上下文。
因此，在切换过程不需要SGW更新该UE的S1-U承载。
进一步的，收发器1201还可以在发送第一请求消息后，接收MME针对该第一请求消息发送的指示消息，该指示消息用于指示eNB1200删除该UE的上下文中该SGW的相关信息，并配置该UE释放与eNB1200之间的DRB。
因此，处理器1202还可以根据该指示消息，删除该SGW的相关信息，并配置该UE释放与eNB1200之间的DRB。
需要说明的是，该指示消息是在MME根据第一请求消息向SGW请求删除该UE的S1-U承载，并接收到SGW的响应消息后发送给eNB1200的。
优选的，收发器1201接收到的指示消息可以携带有第一信息，该第一信息用于通知该UE进入目标状态。进一步的，收发器1201还会将该第一信息发送给该UE，以通知该UE进入目标状态。
优选的，收发器1201还可以向该MME发送该指示消息的响应消息，其中，该指示消息的响应消息用于指示该SGW的相关信息已删除且该UE与eNB1200之间的DRB释放完成。
具体的，收发器1201向MME发送的第一请求消息可以是接收到UE发送的第一请求消息，该第一请求消息是UE在第一时间段内没有数据传输时发送给eNB1200的。
具体的，收发器1201向MME发送的第一请求消息还可以是处理器1202 在检测到该UE在第二时间段内没有数据传输，且该UE正在进行V2X业务的情况下生成的。
在一种实现方式中，在收发器1201接收的指示消息还用于指示eNB1200挂起与MME的S1-AP连接的情况下，处理器1202还可以挂起与MME的S1-AP连接，此时MME侧已删除与eNB1200的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与eNB1200的S1-AP连接。此时UE在MME中处于ECM空闲态。
或者，在收发器1201接收的指示消息还用于指示eNB1200删除与MME的S1-AP连接的连接信息的情况下，处理器1202还可以删除与MME的S1-AP连接的连接信息，此时MME侧已删除与eNB1200的S1-AP连接的连接信息。此时UE在MME中处于ECM空闲态。
或者，在收发器1201接收的指示消息还用于指示eNB1200保留与MME的S1-AP连接的情况下，处理器1202还可以保留与MME的S1-AP连接，此时MME侧也保留有与eNB1200的S1-AP连接。此时UE在MME中仍然处于ECM连接态。
在另一种实现方式中，收发器1201在发送第一请求消息或者指示消息的响应消息之前，处理器1202还可以挂起与MME的S1-AP连接，那么收发器1201发送的第一请求消息或者指示消息的响应消息中还可以用于请求MME删除与eNB1200的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与eNB1200的S1-AP连接。这样就可以将ECM连接态的UE配置到ECM空闲态。
或者，收发器1201在发送第一请求消息或者指示消息的响应消息之前，处理器1202还可以删除与MME的S1-AP连接的连接信息，那么收发器1201发送的第一请求消息或者指示消息的响应消息中还可以用于请求MME删除与eNB1200的S1-AP连接的连接信息。这样就可以将ECM连接态的UE配置到ECM空闲态。
或者，收发器1201在发送第一请求消息或者指示消息的响应消息之前，处理器1202保留与MME的S1-AP连接，那么收发器1201发送的第一请求消息或者指示消息的响应消息中还可以用于请求MME保留与eNB1200的S1-AP 连接。这样就可以UE仍然处于ECM连接态。
优选的，在UE处于目标状态且处于ECM空闲态的请求下，收发器1201还可以接收MME发送的paging消息，该paging消息包括UE的寻呼标识和该UE处于目标状态的指示。处理器1202从而可以根据该指示检查eNB1200是否保存有该UE的寻呼标识。如果确定保存有该UE的寻呼标识，处理器1202会控制收发器1201与MME建立S1-AP连接。如果没有保存该UE的寻呼标识，处理器1202会丢弃该paging消息。
可见，在图11或图12所描述的eNB中，eNB可以在处于ECM连接态的UE长时间没有数据传输的请求下，向MME发送用于请求使该UE进入目标状态的第一请求消息，MME在接收到该请求消息后，会发起第一过程以使该UE进入目标状态。在第一过程中，eNB会根据指示删除SGW的相关信息，并配置UE释放DRB，从而使得UE在目标状态下与基站之间存在RRC连接，但是不存在DRB，而eNB与SGW之间也不存在该UE的S1-U承载。这样既可以满足UE在进行V2X业务时需要处于RRC连接态的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于ECM连接态的UE在切换过程中网络侧的信令负荷。
基于图1所示的EPS系统，本发明实施例公开了一种用户终端UE。请参阅图13，图13是本发明实施例公开的一种UE的结构示意图。如图13所示，该UE1300可以包括收发模块1301和处理模块1302，其中：
收发模块1301，用于向MME发送第一请求消息，该第一请求消息用于请求使UE1300进入目标状态。那么MME在接收到第一请求消息后，会发起第一过程以使UE1300进入目标状态。在目标状态下，UE1300与s-eNB之间存在RRC连接，但不存在DRB，s-eNB与SGW之间也不存在UE1300的S1-U承载。
通过这种方式，当UE1300的服务基站发生变化时，UE1300在切换过程中，SGW不需要更新UE1300的S1-U承载。
具体的，收发模块1301向MME发送第一请求消息之前，如果UE1300 处于ECM连接态，处理模块1302可以先检测UE1300没有数据传输的时长超过第一时间段，如果超过第一时间段，处理模块1302会通知收发模块1301，收发模块1301会向s-eNB发送第一请求消息，s-eNB从而会将该第一请求消息转发给MME。
具体的，收发模块1301向MME发送第一请求消息之前，如果UE1300处于ECM空闲态，且UE1300有V2X业务传输需求，收发模块1301会将第一请求消息发送给MME。其中，该第一请求消息可以为扩展服务请求，该扩展服务请求可以包括用于指示无需为UE1300建立S1-U承载和DRB的标识。
优选的，收发模块1301还可以接收s-eNB发送的配置消息，该配置消息用于指示UE1300释放DRB。处理模块1302会根据该配置消息释放与s-eNB之间的DRB。
优选的，收发模块1301还可以接收s-eNB发送的第一信息，该第一信息用于通知UE1300进入目标状态。该第一信息可以是携带在配置消息中，本发明实施例不做限定。
基于图1所示的EPS系统，本发明实施例公开了另一种UE。请参阅图14，图14是本发明实施例公开的另一种UE的结构示意图。如图14所示，该UE1400可以包括收发器1401和处理器1402，其中：
收发器1401，用于向MME发送第一请求消息，该第一请求消息用于请求使UE1400进入目标状态。那么MME在接收到第一请求消息后，会发起第一过程以使UE1400进入目标状态。在目标状态下，UE1400与s-eNB之间存在RRC连接，但不存在DRB，s-eNB与SGW之间也不存在UE1400的S1-U承载。
通过这种方式，当UE1400的服务基站发生变化时，UE1400在切换过程中，SGW不需要更新UE1400的S1-U承载。
具体的，收发器1401向MME发送第一请求消息之前，如果UE1400处于ECM连接态，处理器1402可以先检测UE1300没有数据传输的时长超过第一时间段，如果超过第一时间段，处理模块1302会通知收发器1401，收发器1401会向s-eNB发送第一请求消息，s-eNB从而会将该第一请求消息转发给MME。
具体的，收发器1401向MME发送第一请求消息之前，如果UE1400处于ECM空闲态，且UE1400有V2X业务传输需求，收发器1401会将第一请求消息发送给MME。其中，该第一请求消息可以为扩展服务请求，该扩展服务请求可以包括用于指示无需为UE1400建立S1-U承载和DRB的标识。
优选的，收发器1401还可以接收s-eNB发送的配置消息，该配置消息用于指示UE1400释放DRB。处理器1402会根据该配置消息释放与s-eNB之间的DRB。
优选的，收发器1401还可以接收s-eNB发送的第一信息，该第一信息用于通知UE1400进入目标状态。该第一信息可以是携带在配置消息中，本发明实施例不做限定。
可见，在图13或图14所描述的UE中，如果UE处于ECM连接态，该UE会在长时间没有数据传输的情况下向MME发送用于请求使该UE进入目标状态的第一请求消息；如果UE处于ECM空闲态，该UE会在有V2X业务传输需求的情况下向MME发送用于请求使该UE进入目标状态的第一请求消息。MME在接收到该请求消息后，会发起第一过程以使该UE进入目标状态。从而使得UE在目标状态下与基站之间存在RRC连接，但是不存在DRB，而eNB与SGW之间也不存在该UE的S1-U承载。这样既可以满足UE在进行V2X业务时需要处于RRC连接态的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于ECM连接态的UE在切换过程中网络侧的信令负荷。
基于图1所是的EPS系统，本发明实施例公开了一种UE的管理系统。请参阅图15，图15是本发明实施例公开的一种UE的管理系统的结构示意图。如图15所示，该系统可以包括UE151、s-eNB152、MME153、SGW154以及t-eNB155，其中：
UE151与s-eNB152之间通过Uu接口连接，s-eNB152和t-eNB155与MME153之间通过S1接口连接，s-eNB152和t-eNB155与SGW154之间也通过S1接口连接，s-eNB152与t-eNB155之间通过X2接口连接，MME153与 SGW154之间通过S11接口连接。
UE151在处于ECM空闲态，且有V2X业务传输的情况下，会向MME153发送第一请求消息，该第一请求消息用于请求使UE151进入目标状态。
UE151在处于ECM连接态，且长时间没有数据传输的情况下，也可以向MME153发送第一请求消息。
s-eNB152也可以在检测到处于ECM连接态的UE151长时间没有数据传输的情况下，向MME153发送第一请求消息。
MME153在接收到第一请求消息后，会发起第一过程以使UE151进入目标状态。在目标状态下UE151与s-eNB152之间存在RRC连接，但不存在DRB，s-eNB152与SGW154之间不存在UE151的S1-U承载。这样在UE151的服务基站发生变化的情况下，只需要s-eNB152与t-eNB155之间传递UE151的上下文即可，而不需要SGW154更新UE151的S1-U承载。
具体的，如果UE151当前处于ECM连接态，那么第一过程是需要SGW154删除与s-eNB152之间的该UE151的S1-U承载；s-eNB152也需要从UE151的上下文中删除SGW154的相关信息；UE151也需要删除与s-eNB152之间的DRB。
具体的，如果UE151当前处于ECM空闲态，那么第一过程只需要s-eNB152为UE151建立V2X相关的上下文，而不需要s-eNB152与SGW154之间建立UE151的S1-U承载，也不需要s-eNB152为UE151配置DRB。
可见，在图15所是的UE的管理系统中，MME在接收到用于请求让UE进入目标状态的请求消息后，会发起第一过程以使该UE进入目标状态，从而使得UE在目标状态下与基站之间存在RRC连接，但是不存在DRB，而基站与SGW之间也不存在该UE的S1-U承载。这样既可以满足UE通过RRC连接实时进行V2X业务的需求，而在UE的服务基站发生变化的情况下，源基站与目标基站之间只需要传递该UE的上下文，不需要重新建立DRB，也不需要SGW修改该UE的S1-U承载，从而可以减少处于RRC连接态的UE在切换过程中网络侧的信令负荷。
需要说明的是，在上述实施例中，对各个实施例的描述都各有侧重，某个 实施例中没有详细描述的部分，可以参见其他实施例的相关描述。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本发明所必须的。
本发明实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本发明实施例MME、eNB和UE中的模块可以根据实际需要进行合并、划分和删减。
本发明实施例中所述MME、eNB和UE，可以通过通用集成电路，例如CPU(Central Processing Unit，中央处理器)，或通过ASIC(Application Specific Integrated Circuit，专用集成电路)来实现。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
以上对本发明实施例公开的一种用户终端的管理方法及相关设备进行了详细介绍，本文中应用了具体实例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (69)

  1. 一种用户终端UE的管理方法，应用于移动管理实体MME，其特征在于，所述方法包括：
    所述MME接收第一请求消息，所述第一请求消息用于请求使UE进入目标状态；
    所述MME根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态；其中，在所述目标状态下，所述UE与源基站s-eNB之间存在无线资源控制RRC连接，不存在数据无线承载DRB，所述s-eNB与服务网关SGW之间不存在所述UE的用户面接口S1-U承载，且在所述UE的服务基站发生变化的情况下，所述s-eNB与目标基站t-eNB之间传递所述UE的上下文。
  2. 根据权利要求1所述的方法，其特征在于，所述MME接收第一请求消息，包括：
    所述MME接收由处于演进型分组系统连接管理ECM连接态的UE在第一时间段内没有数据传输的情况下，经s-eNB发送的第一请求消息；
    或者，
    所述MME接收由s-eNB在检测到处于ECM连接态的UE在第二时间段内没有数据传输，且所述UE正在进行车与外界V2X业务的情况下发送的第一请求消息；
    或者，
    所述MME接收由处于ECM空闲态的UE在有V2X业务传输需求的情况下发送的第一请求消息。
  3. 根据权利要求1或2所述的方法，其特征在于，如果所述UE处于所述ECM连接态，所述第一过程包括：
    所述MME在接收所述第一请求消息后，向所述SGW发送第二请求消息，所述第二请求消息用于请求所述SGW删除所述UE的S1-U承载；
    所述MME接收所述SGW发送的所述第二请求消息的响应消息；
    所述MME向所述s-eNB发送指示消息，以使所述s-eNB删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述s-eNB之间的DRB。
  4. 根据权利要求3所述的方法，其特征在于，所述指示消息携带第一信息， 所述第一信息用于通知所述UE进入所述目标状态。
  5. 根据权利要求3或4所述的方法，其特征在于，所述MME向所述s-eNB发送指示消息之后，所述方法还包括：
    所述MME接收所述s-eNB发送所述指示消息的响应消息，所述指示消息的响应消息用于指示所述SGW的相关信息已删除且所述UE与所述s-eNB之间的DRB释放完成。
  6. 根据权利要求3～5任一项所述的方法，其特征在于，如果所述MME接收由处于ECM连接态的UE经s-eNB发送的第一请求消息，所述方法还包括：
    所述MME在接收所述第一请求消息后，删除与所述s-eNB的除在所述MME中所述UE的控制面接口S1-AP连接标识MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述s-eNB的S1-AP连接，并指示所述s-eNB挂起与所述MME的S1-AP连接；
    或者，
    所述MME在接收所述第一请求消息后，删除与所述s-eNB的S1-AP连接的连接信息，并指示所述s-eNB删除与所述MME的S1-AP连接的连接信息；
    或者，
    所述MME在接收所述第一请求消息后，保留与所述s-eNB的S1-AP连接，并指示所述s-eNB保留与所述MME的S1-AP连接。
  7. 根据权利要求3～5任一项所述的方法，其特征在于，如果所述MME接收由s-eNB发送的第一请求消息，所述方法还包括：
    所述MME在接收所述第一请求消息后，删除与所述s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述s-eNB的S1-AP连接；
    或者，
    所述MME在接收所述第一请求消息后，删除与所述s-eNB的S1-AP连接的连接信息；
    或者，
    所述MME在接收所述第一请求消息后，保留与所述s-eNB的S1-AP连接。
  8. 根据权利要求1或2所述的方法，其特征在于，如果所述UE处于所述ECM空闲态，所述第一请求消息为扩展服务请求，所述扩展服务请求包括用于指示 无需为所述UE建立S1-U承载和DRB的标识，所述第一过程包括：
    所述MME从所述UE的上下文中获取所述UE的V2X相关信息；
    所述MME根据所述扩展服务请求向所述s-eNB发送第三请求消息，所述第三请求消息包括所述UE的V2X相关信息，所述第三请求消息用于请求所述s-eNB为所述UE建立V2X相关的上下文。
  9. 根据权利要求1～8任一项所述的方法，其特征在于，所述MME根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态之后，所述方法还包括：
    所述MME接收所述SGW发送的所述UE的下行业务传输通知；
    如果所述UE处于所述目标状态且处于所述ECM空闲态，所述MME向所述MME所管理的eNB发送寻呼paging消息，所述paging消息包括所述UE的寻呼标识和所述UE处于所述目标状态的指示，所述指示用于指示接收到所述paging消息的eNB检查是否保存有所述UE的寻呼标识。
  10. 一种UE的管理方法，应用于s-eNB，其特征在于，所述方法包括：
    所述s-eNB向MME发送第一请求消息，所述第一请求消息用于请求使UE进入目标状态；其中，在所述目标状态下，所述UE与所述s-eNB之间存在RRC连接，不存在DRB，所述s-eNB与SGW之间不存在所述UE的S1-U承载；
    在所述MME根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态，且所述UE的服务基站发生变化的情况下，所述s-eNB与t-eNB之间传递所述UE的上下文。
  11. 根据权利要求10所述的方法，其特征在于，所述s-eNB向MME发送第一请求消息之后，以及所述s-eNB与t-eNB之间传递所述UE的上下文之前，所述方法还包括：
    所述s-eNB接收所述MME针对所述第一请求消息发送的指示消息，所述指示消息用于指示所述s-eNB删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述s-eNB之间的DRB；
    所述s-eNB根据所述指示消息删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述s-eNB之间的DRB。
  12. 根据权利要求11所述的方法，其特征在于，所述指示消息携带第一信息，所述第一信息用于通知所述UE进入所述目标状态。
  13. 根据权利要求11或12所述的方法，其特征在于，所述s-eNB根据所述指示消息删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述s-eNB之间的DRB之后，所述方法还包括：
    所述s-eNB向所述MME发送所述指示消息的响应消息，所述指示消息的响应消息用于指示所述SGW的相关信息已删除且所述UE与所述s-eNB之间的DRB释放完成。
  14. 根据权利要求10～13任一项所述的方法，其特征在于，所述s-eNB向MME发送第一请求消息之前，所述方法还包括：
    所述s-eNB接收UE发送的第一请求消息，所述第一请求消息由处于ECM连接态的所述UE在第一时间段内没有数据传输的情况下发送给所述s-eNB。
  15. 根据权利要求10～13任一项所述的方法，其特征在于，所述s-eNB向MME发送第一请求消息之前，所述方法还包括：
    所述s-eNB检测处于ECM连接态的UE在第二时间段内没有数据传输；
    所述s-eNB检测所述UE正在进行V2X业务。
  16. 根据权利要求14所述的方法，其特征在于，所述s-eNB接收所述MME针对所述第一请求消息发送的指示消息之后，所述方法还包括：
    所述指示消息还用于指示所述s-eNB挂起与所述MME的S1-AP连接，所述s-eNB挂起与所述MME的S1-AP连接；
    或者，
    所述指示消息还用于指示所述s-eNB删除与所述MME的S1-AP连接的连接信息，所述s-eNB删除与所述MME的S1-AP连接的连接信息；
    或者，
    所述指示消息还用于指示所述s-eNB保留与所述MME的S1-AP连接，所述s-eNB保留与所述MME的S1-AP连接。
  17. 根据权利要求15所述的方法，其特征在于，所述s-eNB检测所述UE正在进行V2X业务之后，以及所述s-eNB向MME发送第一请求消息之前，所述方法还包括：
    所述s-eNB挂起与所述MME的S1-AP连接，所述第一请求消息还用于请求所述MME删除与所述s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述s-eNB的S1-AP连接；
    或者，
    所述s-eNB删除与所述MME的S1-AP连接的连接信息，所述第一请求消息还用于请求所述MME删除与所述s-eNB的S1-AP连接的连接信息；
    或者，
    所述s-eNB保留与所述MME的S1-AP连接，所述第一请求消息还用于请求所述MME保留与所述s-eNB的S1-AP连接。
  18. 根据权利要求16或17所述的方法，其特征在于，在所述s-eNB挂起与所述MME的S1-AP连接或删除与所述MME的S1-AP连接的连接信息的情况下，所述UE处于所述目标状态且处于ECM空闲态，所述方法还包括：
    所述s-eNB接收所述MME发送的paging消息，所述paging消息包括所述UE的寻呼标识和所述UE处于所述目标状态的指示；
    所述s-eNB根据所述指示检查所述s-eNB是否保存有所述UE的寻呼标识；
    所述s-eNB在确定保存有所述UE的寻呼标识的情况下，与所述MME建立S1-AP连接；
    所述s-eNB在确定未保存有所述UE的寻呼标识的情况下，丢弃所述paging消息。
  19. 一种UE的管理方法，应用于UE，其特征在于，所述方法包括：
    所述UE向MME发送第一请求消息，所述第一请求消息用于请求使所述UE进入目标状态，在所述目标状态下，所述UE与s-eNB之间存在RRC连接，不存在DRB，所述s-eNB与SGW之间不存在所述UE的S1-U承载。
  20. 根据权利要求19所述的方法，其特征在于，在所述UE处于ECM连接态的情况下，所述UE向MME发送第一请求消息之前，所述方法还包括：
    所述UE检测所述UE在第一时间段内没有数据传输；
    所述UE向MME发送第一请求消息，包括：
    所述UE经s-eNB向MME发送第一请求消息。
  21. 根据权利要求19所述的方法，其特征在于，在所述UE处于ECM空闲态的情况下，所述UE向MME发送第一请求消息，包括：
    所述UE在有V2X业务传输需求的情况下，向MME发送第一请求消息，所述第一请求消息为扩展服务请求，所述扩展服务请求包括用于指示无需为所述UE建立S1-U承载和DRB的标识。
  22. 根据权利要求20所述的方法，其特征在于，所述UE向MME发送第一请求消息之后，所述方法还包括：
    所述UE接收所述s-eNB发送的用于指示释放DRB的配置消息；
    所述UE释放与所述s-eNB之间的DRB。
  23. 根据权利要求21或22所述的方法，其特征在于，所述UE向MME发送第一请求消息之后，所述方法还包括：
    所述UE接收所述s-eNB发送的第一信息，所述第一信息用于通知所述UE进入所述目标状态。
  24. 一种MME，其特征在于，所述MME包括：
    收发模块，用于接收第一请求消息，所述第一请求消息用于请求使UE进入目标状态；
    处理模块，用于根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态；其中，在所述目标状态下，所述UE与s-eNB之间存在RRC连接，不存在DRB，所述s-eNB与SGW之间不存在所述UE的S1-U承载，且在所述UE的服务基站发生变化的情况下，所述s-eNB与t-eNB之间传递所述UE的上下文。
  25. 根据权利要求24所述的MME，其特征在于，所述收发模块接收第一请求消息的具体方式为：
    接收由处于ECM连接态的UE在第一时间段内没有数据传输的情况下，经s-eNB发送的第一请求消息；
    或者，
    接收由s-eNB在检测到处于ECM连接态的UE在第二时间段内没有数据传输，且所述UE正在进行V2X业务的情况下发送的第一请求消息；
    或者，
    接收由处于ECM空闲态的UE在有V2X业务传输需求的情况下发送的第一请求消息。
  26. 根据权利要求24或25所述的MME，其特征在于，所述处理模块根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态的具体方式为：
    在所述UE处于所述ECM连接态，且在所述收发模块接收到所述第一请求消息的情况下，控制所述收发模块向所述SGW发送第二请求消息，所述第二请求消息用于请求所述SGW删除所述UE的S1-U承载；
    控制所述收发模块接收所述SGW发送的所述第二请求消息的响应消息；
    控制所述收发模块向所述s-eNB发送指示消息，以使所述s-eNB删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述s-eNB之间的DRB。
  27. 根据权利要求26所述的MME，其特征在于，所述指示消息携带第一信息，所述第一信息用于通知所述UE进入所述目标状态。
  28. 根据权利要求26或27所述的MME，其特征在于，
    所述收发模块，还用于接收所述s-eNB发送所述指示消息的响应消息，所述指示消息的响应消息用于指示所述SGW的相关信息已删除且所述UE与所述s-eNB之间的DRB释放完成。
  29. 根据权利要求26～28任一项所述的MME，其特征在于，
    所述处理模块，还用于在所述收发模块接收由处于ECM连接态的UE经s-eNB发送的第一请求消息的情况下，删除与所述s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述s-eNB的S1-AP连接，并指示所述s-eNB挂起与所述MME的S1-AP连接；或者，删除与所述s-eNB的S1-AP连接的连接信息，并指示所述s-eNB删除与所述MME的S1-AP连接的连接信息；或者，保留与所述s-eNB的S1-AP连接，并指示所述s-eNB保留与所述MME的S1-AP连接。
  30. 根据权利要求26～28任一项所述的MME，其特征在于，
    所述处理模块，还用于在所述收发模块接收由s-eNB发送的第一请求消息的情况下，删除与所述s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述s-eNB的S1-AP连接；或者，删除与所述s-eNB的S1-AP连接 的连接信息；或者，保留与所述s-eNB的S1-AP连接。
  31. 根据权利要求24或25所述的MME，其特征在于，所述处理模块根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态的具体方式为：
    在所述UE处于所述ECM空闲态，所述第一请求消息为扩展服务请求，且所述扩展服务请求包括用于指示无需为所述UE建立S1-U承载和DRB的标识的情况下，从所述UE的上下文中获取所述UE的V2X相关信息；
    根据所述扩展服务请求，控制所述收发模块向所述s-eNB发送第三请求消息，所述第三请求消息包括所述UE的V2X相关信息，所述第三请求消息用于请求所述s-eNB为所述UE建立V2X相关的上下文。
  32. 根据权利要24～31任一项所述的MME，其特征在于，
    所述收发模块，还用于接收所述SGW发送的所述UE的下行业务传输通知；
    所述收发模块，还用于在所述UE处于所述目标状态且处于所述ECM空闲态的情况下，向所述MME所管理的eNB发送paging消息，所述paging消息包括所述UE的寻呼标识和所述UE处于所述目标状态的指示，所述指示用于指示接收到所述paging消息的eNB检查是否保存有所述UE的寻呼标识。
  33. 一种MME，其特征在于，所述MME包括：
    收发器，用于接收第一请求消息，所述第一请求消息用于请求使UE进入目标状态；
    处理器，用于根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态；其中，在所述目标状态下，所述UE与s-eNB之间存在RRC连接，不存在DRB，所述s-eNB与SGW之间不存在所述UE的S1-U承载，且在所述UE的服务基站发生变化的情况下，所述s-eNB与t-eNB之间传递所述UE的上下文。
  34. 根据权利要求33所述的MME，其特征在于，所述收发器接收第一请求消息的具体方式为：
    接收由处于ECM连接态的UE在第一时间段内没有数据传输的情况下，经s-eNB发送的第一请求消息；
    或者，
    接收由s-eNB在检测到处于ECM连接态的UE在第二时间段内没有数据传输，且所述UE正在进行V2X业务的情况下发送的第一请求消息；
    或者，
    接收由处于ECM空闲态的UE在有V2X业务传输需求的情况下发送的第一请求消息。
  35. 根据权利要求33或34所述的MME，其特征在于，所述处理器根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态的具体方式为：
    在所述UE处于所述ECM连接态，且在所述收发器接收到所述第一请求消息的情况下，控制所述收发器向所述SGW发送第二请求消息，所述第二请求消息用于请求所述SGW删除所述UE的S1-U承载；
    控制所述收发器接收所述SGW发送的所述第二请求消息的响应消息；
    控制所述收发器向所述s-eNB发送指示消息，以使所述s-eNB删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述s-eNB之间的DRB。
  36. 根据权利要求35所述的MME，其特征在于，所述指示消息携带第一信息，所述第一信息用于通知所述UE进入所述目标状态。
  37. 根据权利要求35或37所述的MME，其特征在于，
    所述收发器，还用于接收所述s-eNB发送所述指示消息的响应消息，所述指示消息的响应消息用于指示所述SGW的相关信息已删除且所述UE与所述s-eNB之间的DRB释放完成。
  38. 根据权利要求35～37任一项所述的MME，其特征在于，
    所述处理器，还用于在所述收发器接收由处于ECM连接态的UE经s-eNB发送的第一请求消息的情况下，删除与所述s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述s-eNB的S1-AP连接，并指示所述s-eNB挂起与所述MME的S1-AP连接；或者，删除与所述s-eNB的S1-AP连接的连接信息，并指示所述s-eNB删除与所述MME的S1-AP连接的连接信息；或者，保留与所述s-eNB的S1-AP连接，并指示所述s-eNB保留与所述MME的S1-AP连接。
  39. 根据权利要求35～37任一项所述的MME，其特征在于，
    所述处理器，还用于在所述收发器由s-eNB发送的第一请求消息的情况下，删除与所述s-eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述s-eNB的S1-AP连接；或者，删除与所述s-eNB的S1-AP连接的连接信息； 或者，保留与所述s-eNB的S1-AP连接。
  40. 根据权利要求33或34所述的MME，其特征在于，所述处理器根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态的具体方式为：
    在所述UE处于所述ECM空闲态，所述第一请求消息为扩展服务请求，且所述扩展服务请求包括用于指示无需为所述UE建立S1-U承载和DRB的标识的情况下，从所述UE的上下文中获取所述UE的V2X相关信息；
    根据所述扩展服务请求，控制所述收发器向所述s-eNB发送第三请求消息，所述第三请求消息包括所述UE的V2X相关信息，所述第三请求消息用于请求所述s-eNB为所述UE建立V2X相关的上下文。
  41. 根据权利要求33～40任一项所述的MME，其特征在于，
    所述收发器，还用于接收所述SGW发送的所述UE的下行业务传输通知；
    所述收发器，还用于在所述UE处于所述目标状态且处于所述ECM空闲态的情况下，向所述MME所管理的eNB发送paging消息，所述paging消息包括所述UE的寻呼标识和所述UE处于所述目标状态的指示，所述指示用于指示接收到所述paging消息的eNB检查是否保存有所述UE的寻呼标识。
  42. 一种基站eNB，其特征在于，所述eNB包括：
    收发模块，用于向MME发送第一请求消息，所述第一请求消息用于请求使UE进入目标状态；其中，在所述目标状态下，所述UE与所述eNB之间存在RRC连接，不存在DRB，所述eNB与SGW之间不存在所述UE的S1-U承载；
    处理模块，用于在所述MME根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态，且所述UE的服务基站发生变化的情况下，控制所述收发模块与t-eNB之间传递所述UE的上下文。
  43. 根据权利要求42所述的eNB，其特征在于，
    所述收发模块，还用于接收所述MME针对所述第一请求消息发送的指示消息，所述指示消息用于指示所述eNB删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述eNB之间的DRB；
    所述处理模块，还用于根据所述指示消息删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述eNB之间的DRB。
  44. 根据权利要求43所述的eNB，其特征在于，所述指示消息携带第一信息，所述第一信息用于通知所述UE进入所述目标状态。
  45. 根据权利要求43或44所述的eNB，其特征在于，
    所述收发模块，还用于向所述MME发送所述指示消息的响应消息，所述指示消息的响应消息用于指示所述SGW的相关信息已删除且所述UE与所述eNB之间的DRB释放完成。
  46. 根据权利要求42～45任一项所述的eNB，其特征在于，
    所述收发模块，还用于接收所述UE发送的第一请求消息，所述第一请求消息由处于EMC连接态的所述UE在第一时间段内没有数据传输的情况下发送给所述eNB。
  47. 根据权利要求42～45任一项所述的eNB，其特征在于，
    所述处理模块，还用于检测处于ECM连接态的所述UE在第二时间段内没有数据传输，并检测所述UE正在进行V2X业务。
  48. 根据权利要求46所述的eNB，其特征在于，
    所述处理模块，还用于在所述指示消息还用于指示所述eNB挂起与所述MME的S1-AP连接的情况下，挂起与所述MME的S1-AP连接；或者，在所述指示消息还用于指示所述eNB删除与所述MME的S1-AP连接的连接信息的情况下，删除与所述MME的S1-AP连接的连接信息；或者，在所述指示消息还用于指示所述eNB保留与所述MME的S1-AP连接的情况下，保留与所述MME的S1-AP连接。
  49. 根据权利要求47所述的eNB，其特征在于，
    所述处理模块，还用于挂起与所述MME的S1-AP连接，所述第一请求消息还用于请求所述MME删除与所述eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述eNB的S1-AP连接；或者，删除与所述MME的S1-AP连接的连接信息，所述第一请求消息还用于请求所述MME删除与所述eNB的S1-AP连接的连接信息；或者，保留与所述MME的S1-AP连接，所述第一请求消息还用于请求所述MME保留与所述eNB的S1-AP连接。
  50. 根据权利要求48或49所述的eNB，其特征在于，在所述处理模块挂起与所述MME的S1-AP连接或删除与所述MME的S1-AP连接的连接信息的情况 下，所述UE处于所述目标状态且处于ECM空闲态；
    所述收发模块，还用于接收所述MME发送的paging消息，所述paging消息包括所述UE的寻呼标识和所述UE处于所述目标状态的指示；
    所述处理模块，还用于根据所述指示检查所述eNB是否保存有所述UE的寻呼标识；在确定保存有所述UE的寻呼标识的情况下，与所述MME建立S1-AP连接；在确定未保存有所述UE的寻呼标识的情况下，丢弃所述paging消息。
  51. 一种eNB，其特征在于，所述eNB包括：
    收发器，用于向MME发送第一请求消息，所述第一请求消息用于请求使UE进入目标状态；其中，在所述目标状态下，所述UE与所述eNB之间存在RRC连接，不存在DRB，所述eNB与SGW之间不存在所述UE的S1-U承载；
    处理器，用于在所述MME根据所述第一请求消息发起第一过程以使所述UE进入所述目标状态，且所述UE的服务基站发生变化的情况下，控制所述收发器与t-eNB之间传递所述UE的上下文。
  52. 根据权利要求51所述的eNB，其特征在于，
    所述收发器，还用于接收所述MME针对所述第一请求消息发送的指示消息，所述指示消息用于指示所述eNB删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述eNB之间的DRB；
    所述处理器，还用于根据所述指示消息删除所述UE的上下文中所述SGW的相关信息，并配置所述UE释放与所述eNB之间的DRB。
  53. 根据权利要求52所述的eNB，其特征在于，所述指示消息携带第一信息，所述第一信息用于通知所述UE进入所述目标状态。
  54. 根据权利要求52或53所述的eNB，其特征在于，
    所述收发器，还用于向所述MME发送所述指示消息的响应消息，所述指示消息的响应消息用于指示所述SGW的相关信息已删除且所述UE与所述eNB之间的DRB释放完成。
  55. 根据权利要求51～54任一项所述的eNB，其特征在于，
    所述收发器，还用于接收所述UE发送的第一请求消息，所述第一请求消息由处于ECM连接态的所述UE在第一时间段内没有数据传输的情况下发送给所述eNB。
  56. 根据权利要求51～54任一项所述的eNB，其特征在于，
    所述处理器，还用于检测处于ECM连接态的所述UE在第二时间段内没有数据传输，并检测所述UE正在进行V2X业务。
  57. 根据权利要求55所述的eNB，其特征在于，
    所述处理器，还用于在所述指示消息还用于指示所述eNB挂起与所述MME的S1-AP连接的情况下，挂起与所述MME的S1-AP连接；或者，删除与所述MME的S1-AP连接的连接信息；或者，保留与所述MME的S1-AP连接。
  58. 根据权利要求56所述的eNB，其特征在于，
    所述处理器，还用于挂起与所述MME的S1-AP连接，所述第一请求消息还用于请求所述MME删除与所述eNB的除MME UE S1 AP ID之外的S1-AP连接的连接信息或挂起与所述eNB的S1-AP连接；或者，删除与所述MME的S1-AP连接的连接信息，所述第一请求消息还用于请求所述MME删除与所述eNB的S1-AP连接的连接信息；或者，保留与所述MME的S1-AP连接，所述第一请求消息还用于请求所述MME保留与所述eNB的S1-AP连接。
  59. 根据权利要求57或58所述的eNB，其特征在于，在所述处理器挂起与所述MME的S1-AP连接或删除与所述MME的S1-AP连接的连接信息的情况下，所述UE处于所述目标状态且处于ECM空闲态；
    所述收发器，还用于接收所述MME发送的paging消息，所述paging消息包括所述UE的寻呼标识和所述UE处于所述目标状态的指示；
    所述处理器，还用于根据所述指示检查所述eNB是否保存有所述UE的寻呼标识；在确定保存有所述UE的寻呼标识的情况下，与所述MME建立S1-AP连接；在确定未保存有所述UE的寻呼标识的情况下，丢弃所述paging消息。
  60. 一种UE，其特征在于，所述UE包括：
    收发模块，用于向MME发送第一请求消息，所述第一请求消息用于请求使所述UE进入目标状态，在所述目标状态下，所述UE与s-eNB之间存在RRC连接，不存在DRB，所述s-eNB与SGW之间不存在所述UE的S1-U承载。
  61. 根据权利要求60所述的UE，其特征在于，所述UE还包括第一处理模块，其中：
    所述第一处理模块，用于在所述UE处于ECM连接态的情况下，检测所述UE在第一时间段内没有数据传输；
    所述收发模块向MME发送第一请求消息的具体方式为：
    经s-eNB向MME发送第一请求消息。
  62. 根据权利要求60所述的UE，其特征在于，所述收发模块向MME发送第一请求消息的具体方式为：
    在所述UE处于ECM空闲态，且有V2X业务传输需求的情况下，向MME发送第一请求消息，所述第一请求消息为扩展服务请求，所述扩展服务请求包括用于指示无需为所述UE建立S1-U承载和DRB的标识。
  63. 根据权利要求61所述的UE，其特征在于，所述UE还包括第二处理模块，其中：
    所述收发模块，还用于接收所述s-eNB发送的用于指示释放DRB的配置消息；
    所述第二处理模块，用于释放与所述s-eNB之间的DRB。
  64. 根据权利要求62或63所述的UE，其特征在于，
    所述收发模块，还用于接收所述s-eNB发送的第一信息，所述第一信息用于通知所述UE进入所述目标状态。
  65. 一种UE，其特征在于，所述UE包括：
    收发器，用于向MME发送第一请求消息，所述第一请求消息用于请求使所述UE进入目标状态，在所述目标状态下，所述UE与s-eNB之间存在RRC连接，不存在DRB，所述s-eNB与SGW之间不存在所述UE的S1-U承载。
  66. 根据权利要求65所述的UE，其特征在于，所述UE还包括第一处理器，其中：
    所述第一处理器，用于在所述UE处于ECM连接态的情况下，检测所述UE在第一时间段内没有数据传输；
    所述收发器向MME发送第一请求消息的具体方式为：
    经s-eNB向MME发送第一请求消息。
  67. 根据权利要求65所述的UE，其特征在于，所述收发器向MME发送第一请求消息的具体方式为：
    在所述UE处于ECM空闲态，且有V2X业务传输需求的情况下，向MME发送第一请求消息，所述第一请求消息为扩展服务请求，所述扩展服务请求包括用于指示无需为所述UE建立S1-U承载和DRB的标识。
  68. 根据权利要求66所述的UE，其特征在于，所述UE还包括第二处理器，其中：
    所述收发器，还用于接收所述s-eNB发送的用于指示释放DRB的配置消息；
    所述第二处理器，用于释放与所述s-eNB之间的DRB。
  69. 根据权利要求67或68所述的UE，其特征在于，
    所述收发器，还用于接收所述s-eNB发送的第一信息，所述第一信息用于通知所述UE进入所述目标状态。
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