CN108886474B - A user terminal management method and related equipment - Google Patents

Abstract

The embodiment of the invention discloses a management method of a user terminal and related equipment, wherein the method can comprise the following steps: the MME may initiate a first procedure to cause the UE to enter the target state after receiving a first request message requesting the UE to enter the target state. In the target state, the UE has RRC connection with the source base station, but there is no DRB, and there is no S1-U bearer for the UE between the source base station and the serving gateway. Therefore, the requirement that the UE needs to be in an RRC connection state when the V2X service is carried out can be met, and under the condition that the service base station of the UE is changed, the context of the UE only needs to be transferred between the source base station and the target base station, the DRB does not need to be reestablished, and the SGW does not need to modify the S1-U bearing of the UE, so that the signaling load of the UE in the ECM connection state on the network side in the switching process can be reduced.

Description

A user terminal management method and related equipment

technical field

Embodiments of the present invention relate to the field of mobile communication technologies, and in particular, to a user terminal management method and related equipment.

Background technique

The Internet of Vehicles is based on the intra-vehicle network, the inter-vehicle network and the in-vehicle mobile Internet. According to the agreed communication protocols and data exchange standards, wireless communication and information exchange are carried out 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. Among them, X includes vehicles, roads, pedestrians, and the Internet.

In the Internet of Vehicles, when a User Equipment (UE) performs V2X data services, the core network side, namely the Evolved Packet System (EPS), mainly has two resource scheduling methods. The base station uniformly schedules resources and the UE The resource is autonomously selected from the resource pool obtained by the base station side. Among them, in the way that the base station uniformly schedules resources, the UE needs to be in the radio resource control (Radio Resource Control, RRC) connected state all the time, so as to ensure that when a V2X message needs to be sent, the UE can timely apply for resources from the base station side to meet the V2X requirements. Delay requirement for message sending.

In the prior art, when the UE is in the RRC connected state, it is generally also in the Evolved Packet System Connection management (ECM) connected state, and when the UE is in the ECM connected state, once the serving cell changes, will trigger the switch. Considering the high mobility of the vehicle, during the V2X service, the serving cell of the UE will inevitably change frequently, which will lead to frequent handovers. During the handover process, a large amount of signaling will be generated on the network side, which will cause a serious signaling load to the network.

SUMMARY OF THE INVENTION

The embodiments of the present invention disclose a user terminal management method and related equipment, which can reduce the signaling load of the network.

A first aspect of the embodiments of the present invention discloses a management method for a user terminal UE, which is applied to a mobility management entity MME. The method may include:

After receiving the first request message, the MME can initiate a first process according to the first request message to make the UE enter the target state; wherein, the first request message is used to request the UE to enter the target state. In the target state, the UE and the UE enter the target state. There is an RRC connection between the source base station s-eNB, there is no data radio bearer DRB, there is no user plane interface S1-U bearer of the UE between the s-eNB and the serving gateway SGW, and the serving base station of the UE changes. Next, the context of the UE is transferred between the s-eNB and the target base station t-eNB.

The MME can make the UE enter the target state by initiating the first process, so that there is an RRC connection between the UE and the s-eNB, but there is no DRB, and there is no S1-U bearer of the UE between the s-eNB and the SGW. , so that when the serving base station of the UE changes, only the context of the UE needs to be transferred between the s-eNB and the target base station, without the need to re-establish the DRB, and without the need for the SGW to modify the S1-U bearer of the UE. Reduce the signaling load on the network side during the handover process of the UE in the ECM connected state.

As a feasible implementation manner, the MME receiving the first request message may specifically include:

The MME receives the first request message sent by the s-eNB when the UE in the ECM connected state has no data transmission within the first time period;

or,

The MME receives the first request message sent by the s-eNB when it detects that the UE in the ECM connected state has no data transmission within the second time period, and the UE is conducting a V2X service;

or,

The MME receives the first request message sent by the UE in the ECM idle state when there is a need for V2X service transmission.

As another feasible implementation manner, if the UE is in the ECM connected state, the first process initiated by the MME may specifically include:

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; after the MME receives the second request message sent by the SGW After the response message, an instruction message is sent to the s-eNB, so that the s-eNB deletes the relevant 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.

Further, the indication message may carry first information, where the first information is used to notify the UE to enter the target state.

Further, after the MME sends the indication message to the s-eNB, the method may further include:

The MME receives the response message sent by the s-eNB to the indication message, wherein the response message of the indication message 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.

As another feasible implementation manner, if the MME receives the first request message sent by the UE in the ECM connected state via the s-eNB, the method may further include:

After receiving the first request message, the MME deletes the connection information of the S1-AP connection with the s-eNB except the control plane interface S1-AP connection identifier MME UE S1 AP ID of the UE in the MME or suspends the connection with the S1-AP. S1-AP connection of s-eNB and instruct s-eNB to suspend the S1-AP connection with MME;

or,

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;

or,

After receiving the first request message, the MME retains the S1-AP connection with the s-eNB, and instructs the s-eNB to retain the S1-AP connection with the MME.

It can be understood that if the s-eNB suspends the S1-AP connection with the MME, and the MME deletes the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID or suspends the connection with the S1-AP The S1-AP connection of the s-eNB, or, if the s-eNB deletes the connection information for the S1-AP connection with the MME, and the MME deletes the connection information for the S1-AP connection with the s-eNB, the UE is in the MME Enter the ECM idle state from the ECM connected state. If the s-eNB retains the S1-AP connection with the MME, and the MME also retains the S1-AP connection with the s-eNB, the UE is still in the ECM connected state in the MME.

As another feasible implementation manner, if the MME receives the first request message sent by the s-eNB, the method may further include:

The MME may delete the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID or suspend the connection with the s-eNB after receiving the first request message or after receiving the response message of the indication message. the S1-AP connection;

or,

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 of the indication message;

or,

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.

As another feasible implementation manner, if the UE is in the ECM idle state, the first request message may be an extended service request, and the extended service request includes an identifier for indicating that the S1-U bearer and DRB need not be established for the UE, Therefore, the first process initiated by the MME may specifically include:

After acquiring the V2X related information of the UE from the context of the UE, the MME can send a third request message to the s-eNB according to the extended service request, where the third request message includes the V2X related information of the UE, and the third request message includes the V2X related information of the UE. The three request messages are used to request the s-eNB to establish a V2X-related context for the UE.

As another feasible implementation manner, after the MME initiates the first procedure according to the first request message to make the UE enter the target state, the method may further include:

If the SGW detects that the UE has downlink services, the MME will receive the downlink service transmission notification about the UE sent by the SGW; if the UE is in the target state and in the ECM idle state, the MME will report to the MME management 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, wherein the paging message includes the paging identifier of the UE and an indication that the UE is in the target state. Check whether the paging identity of the UE is stored in the eNB indicating that the paging message is received.

It can be seen that when the UE has downlink services, the MME will send a paging message to all base stations in the TA list to which the UE belongs. An S1-AP connection is established to schedule resources for the UE.

A second aspect of the embodiments of the present invention discloses an MME. The MME 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.

A third aspect of the embodiments of the present invention discloses another MME. The MME may include a transceiver, a processor, etc. 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 may be configured to execute the UE management method disclosed in the first aspect.

A fourth aspect of the embodiments of the present invention discloses another UE management method, which is applied to the s-eNB. 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. In the target state, there is an RRC connection between the UE and the s-eNB, 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 procedure according to the first request message to make the UE enter the target state, and the serving base station of the UE changes, the s- Only the context of the UE needs to be transferred between the eNB and the t-eNB, and the SGW does not need to update the S1-U bearer of the UE.

The eNB may send a first request message for requesting the UE to enter the target state to the MME, and after receiving the request message, the MME will initiate a first procedure to make the UE enter the target state. In the first process, the eNB will delete the relevant information of the SGW according to the instruction, and configure the UE to release the DRB, so that there is an RRC connection between the UE and the base station in the target state, but there is no DRB, and there is no connection between the eNB and the SGW. There is an S1-U bearer for this UE. This can not only meet the requirement that the UE needs to be in the RRC connected state when performing V2X services, but when the serving base station of the UE changes, only the context of the UE needs to be transferred between the source base station and the target base station, and there is no need to re-establish the DRB. , the SGW does not need to modify the S1-U bearer of the UE, so that the signaling load on the network side during the handover process of the UE in the ECM connected state can be reduced.

As a feasible implementation manner, after the s-eNB sends the first request message to the MME, and before the context of the UE is transferred between the s-eNB and the t-eNB, that is, the MME initiates the first process to make the UE enter the target state process, the method may also include:

After receiving the indication message sent by the MME for the first request message, the s-eNB may delete the relevant 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 UE and the s-eNB. The indication message is used to instruct the s-eNB to delete the relevant information of the SGW in the context of the UE, and configure the UE to release the DRB between the UE and the s-eNB.

Further, the indication message sent by the MME may carry first information, where the first information is used to notify the UE to enter the target state.

Further, after the s-eNB deletes the relevant information of the SGW in the context of the UE according to the indication message, and configures the UE to release the DRB between the UE and the s-eNB, 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.

As another feasible implementation manner, before the s-eNB sends the first request message to the MME, the method may further include:

The s-eNB receives the first request message sent by the UE, where the first request message is sent to the s-eNB by the UE in the ECM connected state when there is no data transmission within the first time period. That is, after receiving the first request message sent by the UE, the s-eNB forwards it to the MME.

The s-eNB detects that the UE in the ECM connected state has no data transmission within the second time period;

The s-eNB detects that the UE is conducting a V2X service.

As another feasible implementation manner, before the s-eNB sends the first request message to the MME, the method may further include:

After detecting that the UE in the ECM connected state has no data transmission within the second time period, the s-eNB may detect that the UE is performing a V2X service. That is, the s-eNB sends the first request message to the MME when it detects that the UE in the ECM connected state has no data transmission within the second time period and the UE is performing the V2X service.

As another feasible implementation manner, after the s-eNB receives the indication message sent by the MME for the first request message, the method may further include:

The indication message is also used to instruct the s-eNB to suspend the S1-AP connection with the MME, then the s-eNB will suspend the S1-AP connection with the MME after receiving the indication message;

or,

The indication message is also used to instruct the s-eNB to delete the connection information of the S1-AP connection with the MME, then the s-eNB deletes the connection information of the S1-AP connection with the MME after receiving the indication message;

or,

The indication message is also used to instruct the s-eNB to keep the S1-AP connection with the MME, then the s-eNB will keep the S1-AP connection with the MME after receiving the indication message.

As another feasible implementation manner, after the s-eNB detects that the UE is performing the V2X service, and before the s-eNB sends the first request message to the MME, the method may further include:

The s-eNB suspends the S1-AP connection with the MME, then the first request message sent to the MME can also be used to request the MME to delete the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID or suspend the S1-AP connection with the s-eNB;

or,

The s-eNB deletes the connection information of the S1-AP connection with the MME, then the first request message sent to the MME can also be used to request the MME to delete the connection information of the S1-AP connection with the s-eNB;

or,

If the s-eNB retains the S1-AP connection with the MME, the first request message sent to the MME may also be used to request the MME to retain the S1-AP connection with the s-eNB.

As another feasible implementation manner, when the s-eNB suspends the S1-AP connection with the MME or deletes the connection information of the S1-AP connection with the MME, the UE is in the target state and in the ECM idle state. Under the request of the downlink service of the UE, 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 an indication that the UE is in the target state; then, after receiving the paging message, the s-eNB will check whether the s-eNB is in the target state according to the indication. The paging identifier of the UE is stored; if the paging identifier of the UE is stored, the s-eNB will establish an S1-AP connection with the MME; if the paging identifier of the UE is not stored, the s-eNB will discard the paging message.

A fifth aspect of the embodiments of the present invention discloses an eNB. The eNB may include a transceiver module, a processing module, and the like, and may be used to execute the UE management method disclosed in the fourth aspect.

A sixth aspect of the embodiments of the present invention discloses another eNB, the eNB may include a transceiver, a processor, etc., 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 may be configured to execute the UE management method disclosed in the fourth aspect.

A seventh aspect of the embodiments of the present invention discloses yet another UE management method, which is applied to the 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 that the UE enter the target state. After receiving the first request message, the MME will initiate a first process according to the first request message to make the UE enter the target state. The UE enters the target state. In 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.

Specifically, if the UE is in the ECM connected state, before the UE sends the first request message to the MME, the method may further include:

The UE detects that the UE has no data transmission within the first time period; then the UE sends the first request message to the MME specifically as follows:

The UE sends a first request message to the MME via the s-eNB.

Specifically, if the UE is in the ECM idle state, the first request message sent by the UE to the MME may specifically be:

When the UE has a V2X service transmission requirement, it sends a first request message to the MME, where the first request message may be an extended service request. logo.

As a feasible implementation manner, after the UE sends the first request message to the MME, the method may further include:

After receiving the configuration message sent by the s-eNB for indicating the release of the DRB, the UE may release the DRB with the s-eNB according to the configuration message.

As another feasible implementation manner, after the UE sends the first request message to the MME, 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.

If the UE is in the ECM connected state, the UE will send a first request message to the MME for requesting the UE to enter the target state when there is no data transmission for a long time; if the UE is in the ECM idle state, the UE will be in the V2X state. The first request message for requesting the UE to enter the target state is sent to the MME under the condition of service transmission requirements. After receiving the request message, the MME will initiate the first procedure to make the UE enter the target state. Therefore, there is an RRC connection between the UE and 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. This can not only meet the requirement that the UE needs to be in the RRC connected state when performing V2X services, but when the serving base station of the UE changes, only the context of the UE needs to be transferred between the source base station and the target base station, and there is no need to re-establish the DRB. , the SGW does not need to modify the S1-U bearer of the UE, so that the signaling load on the network side during the handover process of the UE in the ECM connected state can be reduced.

An eighth aspect of the embodiments of the present invention discloses a UE. The UE may include a transceiver module, a processing module, and the like, and may be used to execute the UE management method disclosed in the seventh aspect.

A ninth aspect of the embodiments of the present invention discloses another UE. The UE may include a transceiver, a processor, and the like. 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 may be configured to execute the UE management method disclosed in the seventh aspect.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of the architecture of an EPS system disclosed in an embodiment of the present invention;

2 is a schematic flowchart of a UE management method disclosed in an embodiment of the present invention;

3 is a schematic flowchart of another UE management method disclosed in an embodiment of the present invention;

4 is a schematic diagram of a handover process of a UE in a target state disclosed in an embodiment of the present invention;

5 is a schematic flowchart of another UE management method disclosed in an embodiment of the present invention;

6 is a schematic flowchart of another UE management method disclosed in an embodiment of the present invention;

7 is a schematic diagram of a handover process of another UE in a target state disclosed in an embodiment of the present invention;

8 is a schematic diagram of a handover process of another UE in a target state disclosed in an embodiment of the present invention;

9 is a schematic structural diagram of an MME disclosed in an embodiment of the present invention;

10 is a schematic structural diagram of another MME disclosed in an embodiment of the present invention;

11 is a schematic structural diagram of an eNB disclosed in an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another eNB disclosed in an embodiment of the present invention;

13 is a schematic structural diagram of a UE disclosed in an embodiment of the present invention;

14 is a schematic structural diagram of another UE disclosed in an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a UE management system disclosed in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiments of the present invention disclose a user terminal management method and related equipment, which can reduce the signaling load of the network. Each of them will be described in detail below.

In order to better understand a UE management method and related equipment disclosed in the embodiments of the present invention, the EPS system architecture applicable to the embodiments of the present invention is first described below. Please refer to FIG. 1. FIG. 1 is a schematic diagram of an EPS system architecture disclosed in an embodiment of the present invention. The architecture shown in FIG. 1 includes an Evolved Packet Core (EPC), an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and the Internet. Among them, EPC consists of Mobility Management Entity (MME), Serving Gateway (SGW), Packet Data Network Gateway (PGW), etc. MME is responsible for the signaling processing part of EPC, SGW is responsible for EPC In the data processing part, PGW is responsible for connecting to the Internet; E-UTRAN is mainly composed of UE and base station (eNode B, eNB), UE can include but not limited to vehicles such as cars, buses, bicycles, electric vehicles, and GPS vehicle positioning Terminals, in-vehicle entertainment terminals, in-vehicle information terminals, etc., are not limited in the embodiments of the present invention; the Internet may include Internet of Vehicles, etc., and may specifically include a peer entity (PeerEntity, PE), such as an application server.

In the EPS system, the main function of MME is to support Non-Access Stratum (NAS) signaling and its security, management of Tracking Area (TA) list, selection of PGW and SGW, and cross-MME handover MME selection, user authentication, roaming control, and bearer management are performed at the same time. The SGW is a gateway that terminates at the E-UTRAN interface. Its main function is to act as a local anchor point during inter-eNB handover, and to assist in completing the eNB reordering function. PGW is a gateway for Packet Data Network (PDN) terminating at SGi interface. Its main functions include user-based packet filtering, legal 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 between networks, MME selection when the UE is attached, and scheduling of paging information Transmission, scheduling transmission of broadcast information, setting up and providing measurements of the eNB, etc.

In the EPS system, a radio bearer (RB) 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 for Signaling, such as RRC signaling, is transmitted between the UE and the eNB, and the DRB is used to transmit data between the UE and the eNB. SRBs are divided into SRB0, SRB1 and SRB2 according to different signaling carried. Among them, SRB0 carries the RRC signaling before the establishment of the RRC connection; SRB1 carries the RRC signaling (may carry some NAS signaling) and the NAS signaling before the establishment of SRB2; SRB2 carries the NAS signaling, and the priority of SRB2 is lower than that of SRB1. SRB2 cannot be established until the mode is complete. An S1 bearer is established between the eNB and the SGW, such as a user plane interface (S1 User, S1-U) bearer; an S1 interface application protocol (S1 Application Protocol, S1-AP) connection is established between the eNB and the MME. The connection between the SRB and the S1-AP is collectively referred to as a NAS connection, and the DRB and the S1-U bearer are collectively referred to as an E-UTRAN Radio Access Bearer (E-UTRAN Radio Access Bearer, E-RAB).

In addition, an S5/S8 bearer is established between the SGW and the PGW, and an external bearer, that is, the bearer of the Gi interface, is established between the PGW and the Internet to realize data information exchange with the Internet. Of course, an EPS bearer may also be established between the UE and the PGW, and an end-to-end service (End-to-end Service) may be established between the UE and the PE.

Based on the EPS system shown in FIG. 1 , an embodiment of the present invention discloses a UE management method. Please refer to FIG. 2, which is a schematic flowchart of a UE management method disclosed in an embodiment of the present invention. As shown in Figure 2, the management method of the UE may include the following steps:

201. The MME receives a first request message.

In this embodiment of the present invention, 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 by the source base station s-eNB of the UE to the MME, which is not limited in this embodiment of the present invention. The so-called requesting the MME to make the UE enter the target state means that after receiving the first request message, the MME initiates the first process of making the UE enter the target state.

In this embodiment of the present invention, if the UE is in the ECM connected state in the MME, in the prior art, the UE must be in the RRC connected state in the s-eNB. Therefore, the first request message can be sent by the UE to the MME via the s-eNB when there is no data transmission within the first time period; or the s-eNB can detect that the UE has no data transmission within the second time period. sent to the MME. The first time period may be preset by the UE or configured by the s-eNB to the UE, and the second time period may be preset by the s-eNB or adjusted in real time by the s-eNB according to the network load. , the second time period may be the same as or different from the first time period, which is not limited in this embodiment of the present invention. If the UE is in the ECM idle state in the MME, the UE can directly send a first request message to the MME when there is a need for V2X service transmission, requesting to configure it as the target state.

It should be noted that, in 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 an 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 defined new message, or may be an existing message, where the existing message carries an identifier or an indication for requesting the UE to enter the target state, which is not limited in this embodiment of the present invention. For example, when the s-eNB sends a UE Context Release Request (UE Context Release Request) to the MME, it carries a special cause value, and the special cause value is used to request that the UE enter the target state.

Specifically, the target state may be called an RRC-connected light mode (RRC-connected light mode) state, a light-connected state for short, or an RRC-connected but ECM-idle state (RRC-CONNECTED but ECM-IDLEstate), an embodiment of the present invention Not limited.

202. The MME initiates a first process according to the first request message to make the UE enter the target state.

In this embodiment of the present invention, after receiving the first request message, the MME initiates a first process according to the first request message to make the UE enter the target state, and after the first process is completed, the UE can enter the target state state. Among them, if the UE is in the ECM connected state, the MME initiates the first process to make the UE enter the target state, which is completed 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 make the UE enter the target state. Entering the target state is completed by the cooperation of MME, s-eNB and UE.

Then after the first process is completed, the UE will be in the target state. In the target state, the UE can perform V2X services. In the target state, if the serving base station of the UE changes, in the process of switching the base station, only the context of the UE needs to be transferred between the s-eNB and the target base station t-eNB.

It can be seen that in the method described in FIG. 2, after receiving the request message for requesting the UE to enter the target state, the MME will initiate the first process to make the UE enter the target state, so that the UE can communicate with the base station in the target state. There is an RRC connection between them, but there is no DRB, and there is no S1-U bearer of the UE between the base station and the SGW. This can not only meet the requirement that the UE needs to be in the RRC connected state when performing V2X services, but when the serving base station of the UE changes, only the context of the UE needs to be transferred between the source base station and the target base station, and there is no need to re-establish the DRB. , the SGW does not need to modify the S1-U bearer of the UE, so that the signaling load on the network side during the handover process of the UE in the ECM connected state can be reduced.

Based on the EPS system shown in FIG. 1 , an embodiment of the present invention discloses another UE management method. Please refer to FIG. 3 , which is a schematic flowchart of another UE management method disclosed in an embodiment of the present invention. As shown in Figure 3, the management method of the UE may include the following steps:

301. The UE enters a connected state through an attach (Attach) or a service request (service request), and the s-eNB acquires the V2X related information of the UE from the context of the UE.

In the embodiment of the present invention, the UE enters the connected state through the Attach process or the service request, and the connected state refers to being in the ECM connected state in the MME.

In this embodiment of the present invention, if the UE is a V2X terminal, the s-eNB can acquire the V2X related information of the UE from the context of the UE. The V2X related information may include V2X capability information, etc., which is not limited in this embodiment of the present invention.

302. The s-eNB detects that the UE has no data transmission within the second time period.

303. The s-eNB detects that the UE is performing a V2X service.

In the embodiment of the present invention, when the s-eNB detects that the UE has no uplink and downlink data transmission, it will start an inactive timer (inactive timer). When the duration reaches the second time period, the s-eNB will detect whether the context of the UE contains V2X related information. If it contains V2X related information, it indicates that the UE is a V2X terminal and is conducting a V2X service.

304. The s-eNB sends a first request message to the MME.

In this embodiment of the present invention, after determining that the UE has no data transmission within the second time period and the UR is performing a 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, and the target state may be called RRC-connected light mode or RRC-CONNECTED but ECM-IDLE state.

It should be noted that the first request message may be a UE context release request (UE context release request), then the UE context release request may carry a special cause value, such as cause=lightmode activate, which is used to request the UE to enter Light connection state; the first request message may also be a defined new message, such as an S1-AP connection suspend request (S1-AP connection suspend request), which is not limited in this embodiment of the present invention.

305. The MME receives the first request message, and sends the second request message to the SGW.

In this embodiment of the present invention, 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. Wherein, the second request message may specifically be a Release Access Bearers Request (Release Access Bearers Request).

306. The SGW receives the second request message, and deletes the S1-U bearer of the UE with the s-eNB.

In the embodiment of the present invention, after receiving the second request message, the SGW deletes the S1-U bearer of the UE with the s-eNB.

307. The SGW returns a response message of the second request message to the MME.

In the embodiment of the present invention, after the SGW deletes the S1-U bearer of the UE between the SGW and the s-eNB, it will return a response message of the second request message to the MME, which may specifically be a Release Access Bearers Response (Release Access BearersResponse) .

308. The MME receives the response message of the second request message, and sends an indication message to the s-eNB.

In this embodiment of the present invention, 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 instruct the s-eNB to delete the relevant information of the SGW in the context of the UE, and Instruct the s-eNB to configure the UE to release the DRB with the s-eNB. Wherein, the relevant information of the SGW may include but not limited to the IP address of the SGW and the tunnel endpoint identifier TEID (Tunnel Endpoint Identifier) of the S1-U.

Specifically, the indication message may be a UE context release command (UE context release command), wherein the UE context release command may also carry a cause value, such as cause=light modeactivate, and may also be a defined new message, such as S1- The AP connection suspend response (S1-AP connectionsuspend response) is not limited in this embodiment of the present invention.

309. The s-eNB receives the indication message, and deletes the related information of the SGW in the context of the UE.

310. The s-eNB sends a configuration message for releasing the DRB to the UE.

In the embodiment of the present invention, after receiving the indication message, the s-eNB deletes the relevant 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, and the configuration message may specifically be RRCConnection Reconfiguration. The configuration message is used to instruct the UE to release the DRB between the UE and the s-eNB, and the s-eNB may delete all relevant information of the SGW in the context of the UE, or delete part of the relevant information of the SGW. The present invention The embodiment is not limited.

311. The UE receives the configuration message and releases the DRB with the s-eNB.

In the embodiment of the present invention, after receiving the configuration message, the UE can release the DRB with the s-eNB according to the configuration message, and the UE enters the target state.

Preferably, after the UE completes the release of the DRB between the UE and the s-eNB, 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 completed, then the s-eNB is receiving To the response message of the configuration message, and after completing the deletion of the relevant information of the SGW in the context of the UE, a response message of the indication message may be returned to the MME, and the response message of the indication message is used to indicate that the relevant information of the SGW has been deleted and the The DRB release between the UE and the s-eNB is completed.

Preferably, the indication message sent by the MME to the s-eNB may further carry first information, where the first information is used to notify the UE to enter the target state. That is to say, after receiving the indication message, the s-eNB will forward the first information to the UE, so as to notify the UE to enter the target state.

It should be noted that, the s-eNB may carry the first information when sending the configuration message to the UE, or may send the first information to the UE separately, which is not limited in this embodiment of the present invention.

Preferably, when the s-eNB detects that the UE is conducting the V2X service, before sending the first request message to the MME, the s-eNB can also suspend the S1-AP connection with the MME, and carry the information in the first request message. to request the MME to delete the connection information of the S1-AP connection with the s-eNB except the S1-AP connection identifier (MME UE S1 AP ID) of the UE in the MME, or to suspend the connection with the s-eNB S1-AP connection. Then the MME can delete the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID or suspend the S1-AP connection with the s-eNB after receiving the first request message; or After receiving the response message of the indication message returned by the s-eNB, delete the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID or suspend the S1-AP connection with the s-eNB , so as to prevent that when the process of configuring the UE to enter the target state fails, the state of the UE is inconsistent with the state recorded by the MME, which is not limited in this embodiment of the present invention.

It can be understood that the S1-AP connection with the MME is suspended at the s-eNB, and the MME deletes the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID or suspends the connection with the S1-AP. After the S1-AP of the s-eNB is connected, the UE enters the ECM idle state from the ECM connected state in the MME.

It should be noted that the suspension means that the s-eNB saves the connection information of the S1-AP connection, but the S1-AP connection is in an inactive state.

Preferably, when the s-eNB detects that the UE is conducting the V2X service, before sending the first request message to the MME, the s-eNB may also delete the connection information of the S1-AP connection with the MME, and add the connection information in the first request message to the MME. Carrying connection information for requesting the MME to delete the S1-AP connection with the s-eNB, or suspend the S1-AP connection with the s-eNB. Then the MME can delete the connection information of the S1-AP connection with the s-eNB after receiving the first request message; or delete the S1-AP connection with 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 that the state of the UE is inconsistent with the state recorded by the MME when the process of configuring the UE to enter the target state fails, which is not limited in this embodiment of the present invention.

It can be understood that 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 from the ECM connection state in the MME. ECM idle state.

Preferably, when the s-eNB detects that the UE is conducting the V2X service, before sending the first request message to the MME, the s-eNB may also reserve the S1-AP connection with the MME, and carry the information in the first request message for The MME is requested to reserve the S1-AP connection with the s-eNB. Then the MME can reserve the S1-AP connection with the s-eNB after receiving the first request message; or reserve the S1-AP connection with the s-eNB after receiving the response message of the indication message returned by the s-eNB The connection is not limited in this embodiment of the present invention.

It can be understood that if the s-eNB retains the S1-AP connection with the MME, and the MME also retains the S1-AP connection with the s-eNB, the UE is still in the ECM connected state in the MME.

Please refer to FIG. 4 together. FIG. 4 is a schematic diagram of a handover flow of a UE in a target state disclosed in an embodiment of the present invention. The application scenario of the schematic flowchart shown in FIG. 4 is that the UE in the ECM connected state performs handover between cells under different base stations. As shown in Figure 4, the handover process includes:

11) The UE sends a Measurement Report to the s-eNB.

12) The s-eNB selects a target cell for the UE according to the measurement report, and at the same time checks the context of the UE. The s-eNB determines that the UE is in the target state and in the ECM connected state in the MME according to the context of the UE, and determines that the s-eNB If the handover based on the X2 interface is supported with the target base station t-eNB to which the target cell belongs, the following steps will be performed.

13) The s-eNB sends a handover request (Handover Request) to the t-eNB, the request does not contain the E-RAB configuration list, and further, the request can also carry a new cause value, that is, cause=V2X handover, for Indicates that the UE has V2X capability.

Steps 14) to 16) are normal handover procedures, that is, the t-eNB configures the UE with the resources of the target cell, and then the UE accesses the target cell.

17) After the UE accesses the target cell, the t-eNB will send a path switch request (PathSwitchRequest) to the MME, and the request does not carry the E-RABs Swiched in Downlink list. 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, and thus does not update the S1-U bearer of the UE.

18) After completing the update of the S1-AP bearer of the UE, the MME will return a path switch response (PathSwitch Ack) to the t-eNB.

19) After the t-eNB receives the PathSwitch Ack, it will notify the s-eNB to release the UE context, thereby completing the UE's cell handover.

In the prior art, if the UE is in the ECM connected state and the serving base station of the UE changes, during the handover between the s-eNB and the t-eNB, the UE exists between the s-eNB and the MME. The MME also needs to update the S1-U bearer of the UE, while the embodiment of the present invention does not need to update the S1-U bearer of the UE while supporting the V2X service.

It can be seen that, in the method described in FIG. 3 , when the UE is in the ECM connected state, the first request message may be sent by the s-eNB to the MME. After the MME initiates the 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, during the handover process, the MME does not need to update the S1-U bearer of the UE, thereby reducing the signaling load on the network side to a certain extent. Further, when the UE is in the target state, the delay requirement of the V2X service can also be met.

Based on the EPS system shown in FIG. 1 , another UE management method is disclosed in the embodiment of the present invention. Please refer to FIG. 5. FIG. 5 is a schematic flowchart of another UE management method disclosed in an embodiment of the present invention. As shown in Figure 5, the management method of the UE may include the following steps:

501. The UE in the ECM connected state detects that the UE has no data transmission within the first time period.

It should be noted that, for the manner in which the UE enters the ECM connected state, reference may be made to 401 in FIG. 4 , which is not repeated in this embodiment of the present invention.

In the embodiment of the present invention, the UE has the V2X capability. When the UE is in the connected state (in the s-eNB in the RRC connected state, in the MME in the ECM connected state), if there is no uplink and downlink data transmission, it will start the target state timing For example, the lightmode timer, when the light mode timer times out, that is, the time that the timer obtains that the UE does not transmit uplink and downlink data reaches the first time period, the UE will generate a first request message.

502. The UE sends a first request message to the s-eNB.

In this embodiment of the present invention, the UE will send the first request message to the s-eNB, where the first request message is used to request that the UE enter the target state.

It should be noted that the first request message may be a PDN connection suspend request (PDN connection suspend request), then the PDN connection suspend request may carry a special cause value, such as cause=light mode activate, which is used to request to make the UE Enter the light connection state, or RRC-CONNECTEDbut ECM_IDLE state; the first request message may also be a defined new message, which is not limited in this embodiment of the present invention.

503. The s-eNB receives the first request message, and forwards the first request message to the MME.

In this embodiment of the present invention, after receiving the first request message, the s-eNB forwards the first request message to the MME.

504 to 510 are the same as 305 to 311, and details are not described again in this embodiment of the present invention.

Preferably, after the UE completes the release of the DRB between the UE and the s-eNB, 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 completed, then the s-eNB is receiving To the response message of the configuration message, and after completing the deletion of the relevant information of the SGW in the context of the UE, a response message of the indication message may be returned to the MME, and the response message of the indication message is used to indicate that the relevant information of the SGW has been deleted and the The DRB release between the UE and the s-eNB is completed.

Preferably, the indication message sent by the MME to the s-eNB may further carry first information, where the first information is used to notify the UE to enter the target state. That is to say, after receiving the indication message, the s-eNB will forward the first information to the UE, so as to notify the UE to enter the target state.

Preferably, after receiving the first request message, the MME can also delete the connection information of the S1-AP connection with the s-eNB except the MME UE S1 APID or suspend the S1-AP connection with the s-eNB , and instruct the s-eNB to suspend the S1-AP connection with the MME. The indication may be sent by the MME to the s-eNB alone, or may be carried in an indication message sent to the s-eNB, which is not limited in this embodiment of the present invention.

It can be understood that the S1-AP connection with the MME is suspended at the s-eNB, and the MME deletes the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID or suspends the connection with the S1-AP. After the S1-AP of the s-eNB is connected, the UE enters the ECM idle state from the ECM connected state in the MME.

Preferably, after receiving the first request message, the MME can also delete the connection information connected with the S1-AP of the s-eNB, and instruct the s-eNB to delete the connection information of the S1-AP connection with the MME.

It can be understood that 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 from the ECM connection state in the MME. ECM idle state.

Preferably, after receiving the first request message, the MME may also retain the S1-AP connection with the s-eNB, and instruct the s-eNB to retain the S1-AP connection with the MME.

It can be understood that if the s-eNB retains the S1-AP connection with the MME, and the MME also retains the S1-AP connection with the s-eNB, the UE is still in the ECM connected state in the MME.

Further, when the UE is in the target state, if the SGW has the downlink data service of the UE, and the UE is in the ECM connected state in the MME at this time, the MME will initiate an E- The RAB Set uprequest message rebuilds the E-RAB on the eNB, then the eNB will configure the DRB for the UE through RRC Connection Reconfiguration, and the MME will notify the SGW to restore the downlink bearer of the UE's S1-U after receiving the response message sent by the eNB. If the UE needs to send uplink data, it will send an extended service request (extended service request) to the MME. After receiving the extended service request, the MME rebuilds the E-RAB on the eNB through the E-RAB set up request message, and the eNB will pass the E-RAB set up request message. The Radio Bearer establishment process configures the DRB for the UE. After receiving the response message sent by the eNB, the MME will notify the SGW to restore the S1-U downlink bearer of the UE.

It can be seen that, in the method described in FIG. 5 , when the UE is in the ECM connected state, the first request message may be sent by the UE to the MME via the s-eNB. The MME will initiate the 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, during the handover process, the MME does not need to update the S1-U bearer of the UE, thereby reducing the signaling load on the network side to a certain extent. Further, when the UE is in the target state, the delay requirement of the V2X service can also be met.

Based on the EPS system shown in FIG. 1 , another UE management method is disclosed in the embodiment of the present invention. Please refer to FIG. 6. FIG. 6 is a schematic flowchart of another UE management method disclosed in an embodiment of the present invention. As shown in Figure 6, the management method of the UE may include the following steps:

601. The UE in the ECM idle state sends an extended service request to the MME when there is a V2X service transmission requirement.

In the embodiment of the present invention, if a UE with V2X capability has a V2X service transmission requirement, it will send a first request message to the MME, specifically, the first request message may be sent to the MME through the resident base station. The first request message is specifically Requests can be serviced for extensions. Wherein, the extension server request may carry an identifier, such as an inactive flag, the identifier is used to indicate that the UE is in a target state, and it is not necessary to establish an S1-U bearer and a DRB for the UE.

602. The MME receives the extended service request, and acquires V2X related information of the UE from the context of the UE.

In this embodiment of the present invention, after receiving the extended service request carrying the identifier, the MME will first perform identity verification on the UE, specifically, acquiring V2X related information of the UE from context information of the UE. The third request message is sent to the MME only if the V2X related information is obtained, indicating that the UE has the V2X capability. The V2X related information may include, but is not limited to, V2X capability information, V2X quality of service QoS information, etc.

603. The MME sends a third request message to the s-eNB.

In the embodiment of the present invention, 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 specifically 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 will not carry the E-RAB to be set up list.

604. The s-eNB receives the third request message, and establishes a V2X-related context for the UE.

In the embodiment of the present invention, after receiving the third request message, the s-eNB will acquire the V2X related information of the UE. Then, while establishing the context for the UE according to the third request message, the s-eNB 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.

It should be noted that, since the extended service request includes an indication that the S1-U bearer and DRB do not need to be established for the UE, the MME will not establish an S1-U bearer for the UE after receiving the extended service request, and the s-eNB DRB will also not be configured for this UE.

Preferably, 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 the target state. Then, after receiving the third request message and notifying the UE that it has obtained the context of the UE through the RRC connection reconfiguration process, the s-eNB can also send the first information to the UE to notify the UE that it 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 this embodiment of the present invention.

605. The SGW sends the downlink service transmission notification of the UE to the MME.

In the embodiment of the present invention, after the UE is in the target state, if the SGW has the downlink data service of the UE, it will send the downlink service transmission notification of the UE to the MME, and the MME will receive the downlink service transmission notification of the UE.

606. The MME receives the downlink service transmission notification of the UE, and if the UE is in the target state and in the ECM idle state, the MME sends a paging message to the eNB managed by the MME.

In this embodiment of the present invention, after receiving the downlink service transmission notification of the UE, the MME first checks the context of the UE. If it is determined that the UE is in the ECM idle state in the MME at this time, and the UE is in the target state, then The paging message will be sent to all base stations managed by the MME. Wherein, the paging message may include the paging identifier of the UE and an indication for indicating that the UE is in the target state. Wherein, the paging identity may include a temporary identity identity (S-Temporary Mobile Subscriber Identity, S-TMSI) or an International Mobile Subscriber Identity (IMSI), etc.; the indication is used to instruct the eNB that received the paging message to check Whether the paging identity of the UE is stored.

It can be understood that all base stations managed by the MME mainly refer to all base stations in the Tracking Area List (TA list) to which the UE belongs.

607. The s-eNB receives the paging message, and checks whether the paging identifier of the UE is stored.

In the embodiment of the present invention, the eNB receiving the paging message, assuming that it is an s-eNB, can check whether the same paging identifier exists. If the same paging identifier exists, it means that the s-eNB stores the paging identifier of the UE; if the same paging identifier does not exist, it means that the s-eNB does not store the paging identifier of the UE.

608. If the paging identity of the UE is stored, the s-eNB establishes an S1-AP connection with the MME.

If the s-eNB saves the paging identifier of the UE, it means 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. Data transmission is thus possible.

609. If the paging identifier of the UE is not stored, the s-eNB discards the paging message.

If the s-eNB does not store the paging identifier of the UE, it means that the UE is not in the network covered by the s-eNB, and the s-eNB will therefore discard the paging message.

Similarly, after receiving the paging message, other base stations in the TA list to which the UE belongs will also perform the same operation, which is not repeated in this embodiment of the present invention.

Please refer to FIG. 7 together. FIG. 7 is a schematic diagram of another handover flow of a UE in a target state disclosed in an embodiment of the present invention. The application scenario of the schematic flowchart shown in FIG. 7 is that the UE in the ECM idle state performs handover between cells under different base stations. As shown in Figure 7, the handover process includes:

21) UE sends Measurement Report to s-eNB.

22) The s-eNB selects a target cell for the UE according to the measurement report, and at the same time checks the context of the UE. The s-eNB determines that the UE is in the target state and is in the ECM idle state in the MME according to the context of the UE, and determines that the s-eNB is in the ECM idle state. If the handover based on the X2 interface is supported with the target base station t-eNB to which the target cell belongs, the following steps will be performed.

23) Send a Handover Request to the t-eNB, the request carries a new cause value, such as cause=ECMIDLE handover, and the request also includes the context information of the UE.

24) After receiving the handover request from the UE, the t-eNB will send a HandoverRequestAck to the s-eNB if it agrees that the UE is handed over to the target cell.

25) After the s-eNB receives the HandoverRequestAck, it will notify the UE of the access information of the target cell through the RRC reconfiguration message.

26) After the UE obtains the access information of the target cell, it will access the t-eNB through the RRC reconfiguration message.

27) After completing the cell handover of the UE, the t-eNB will notify the s-eNB to release the UE context.

In the prior art, during the handover process of the UE in the ECM idle state, after completing the handover, the t-eNB will also send a Path Switch Request to the MME to notify the MME that the serving base station of the UE has changed. After receiving the Path Switch Request that the serving base station of the UE has changed, the MME will also send a Modify BearerRequest to the SGW to request the SGW to modify the S1_U bearer of the UE. After receiving the Modify Bearer Response from the SGW, the MME will send the t - eNB returns Path Switch Request Ack. Since in this embodiment of the present invention, the UE is in the target state, and the S1-U bearer of the UE does not exist between the MME and the SGW, when the base station handover based on the X1 interface is performed, the SGW does not need to update the S1-U of the UE. bear.

Please refer to FIG. 8 together. FIG. 8 is a schematic diagram of a handover flow of another UE in a target state disclosed in an embodiment of the present invention. The application scenario of the schematic flowchart shown in FIG. 8 is that the UE in the ECM idle state performs handover between cells under different base stations. As shown in Figure 8, the handover process includes:

31) The UE sends the Measurement Report to the s-eNB.

32)) The s-eNB selects a target cell for the UE according to the measurement report, and checks the context of the UE. The s-eNB determines according to the context of the UE that the UE is in the target state and in the ECM idle state in the MME, and determines that the s- The handover based on the X2 interface is not supported between the eNB and the target base station t-eNB to which the target cell belongs (for example, there is no X2 interface between s-eNB and t-eNB, or s-eNB and t-eNB cannot be connected to the same MME) , then a Handover Request will be sent to the s-MME, the request carries a new cause value, such as cause=ECM IDLE handover, the request includes the context information of the UE

33)～34) s-MME sends the context of the UE to the t-MME to which the t-eNB belongs, and the t-MME sends it to the t-eNB

35) to 37) After the t-eNB prepares the resources, it replies with a handover confirmation message, which is sent to the s-eNB via the t-MME and the s-MME.

38) The s-eNB configures the resources of the target cell to the UE through the RRC reconfiguration message.

39) to 310) The UE replies an RRC reconfiguration complete message to the t-eNB, and at the same time indicates that the t-MME handover is completed.

311) Perform a tracking area update (Tracking Area Update, TAU) process.

312) A period of time after the handover is completed, the s-MME notifies the s-eNB to release the context of the UE.

In the prior art, during the handover process of the UE in the ECM idle state, the UE replies an RRC reconfiguration complete message to the t-eNB, and at the same time instructs the t-MME that the handover is completed, and the t-MME also sends a Modify Bearer Request to the SGW to Request the SGW to modify the S1_U bearer of the UE, and tell the SGW the IP address and domain TEID of the t-eNB. The TAU process will not be performed until the t-MME receives the ModifyBearer Response from the SGW.

It can be seen that in the method described in FIG. 6 , when the UE is in the ECM idle state, if the UE has a V2X service transmission requirement, the MME will initiate the first process to make the UE enter the target state. After the UE enters the target state, if the serving base station of the UE changes, during the handover process, the MME does not need to send a Modify Bearer Request to the SGW, and the SGW does not need to modify the S1-U bearer of the UE, which can reduce the number of S1-U bearers to a certain extent. Signaling load on the network side during handover. Further, when the UE is in the target state, the delay requirement of the V2X service can also be met.

Based on the EPS system shown in FIG. 1 , an embodiment of the present invention discloses a mobility management entity MME. Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of an MME disclosed in an embodiment of the present invention. As shown in FIG. 9, the MME 900 may include a transceiver module 901 and a processing module 902, wherein:

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 the target state.

The processing module 902 is configured to initiate a first process according to the first request message to make the UE enter the target state.

Wherein, in 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 transferred between the s-eNB and the t-eNB without updating the S1-U bearer of the UE.

In a specific implementation, the specific manner in which the transceiver module 901 receives the first request message may include:

Manner 1: When the UE is in the ECM connected state, receive a first request message sent by the UE via the s-eNB when there is no data transmission within the first time period.

Manner 2: When the UE is in the ECM connected state, receive the first request message sent by the s-eNB when it detects that the UE has no data transmission within the second time period and the UE is performing a V2X service.

Manner 3: When the UE is in the ECM idle state, the first request message sent by the UE when there is a V2X service transmission requirement is received.

Further, the specific manner in which the processing module 902 initiates the first process according to the first request message to make the UE enter the target state may be:

When the UE is in the ECM connected state and the transceiver module 901 receives the first request message, the transceiver module 901 is controlled to send 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;

Control the transceiver module 901 to receive the response message of the second request message sent by the SGW;

Control the transceiver module 901 to send an indication message to the s-eNB, so that the s-eNB can delete the relevant information of the SGW in the context of the UE after receiving the indication message, and configure the UE to release the DRB between the s-eNB and the s-eNB .

The above method is applied to the scenario where the UE in the ECM connected state is configured to be in the target state.

Further, the specific manner in which the processing module 902 initiates the first process according to the first request message to make the UE enter the target state may also be:

When the UE is in the ECM idle state, the first request message is an extended service request, and the extended service request includes an identifier indicating that the S1-U bearer and DRB need not be established for the UE, obtain the UE from the context of the UE V2X related information.

The above manner is applied to the scenario where the UE in the ECM idle state is configured as the target state.

Preferably, the indication message sent by the transceiver module 901 to the s-eNB may carry first information, where the first information is used to notify the UE to enter the target state.

Preferably, the transceiver module 901 can also receive a response message to 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 the relevant information of the SGW, and there is a connection between the UE and the s-eNB. The DRB release is complete.

In an implementation manner, if the first request message received by the transceiver module 901 is sent by the UE via the s-eNB, the processing module 902 may also delete the S1-eNB associated with the s-eNB except the MME UE S1 AP ID. The connection information of the AP connection, or suspend the S1-AP connection with the s-eNB, and instruct the s-eNB to suspend the S1-AP connection with the MME900. The suspension refers to that the connection information of the S1-AP connection is reserved, but the S1-AP connection is in an inactive state. At this time, the UE is in the ECM idle state in the MME 900.

If the first request message received by the transceiver module 901 is sent by the UE via the s-eNB, 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-AP connection with the MME 900 - Connection information for AP connection. At this time, the UE is in the ECM idle state in the MME 900.

If the first request message received by the transceiver module 901 is sent by the UE via the s-eNB, the processing module 902 may also reserve the 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 connected state in the MME900.

In another implementation manner, if the first request message received by the transceiver module 901 is sent by the s-eNB, the s-eNB may suspend the communication with the s-eNB before sending the first request message or sending the response message of the indication message. The S1-AP connection of the MME 900, after receiving the first request message or the response message of the indication message, the processing module 902 will also delete the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID , 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.

If the first request message received by the transceiver module 901 is sent by the s-eNB, the s-eNB may delete the connection information of the S1-AP connection with the MME 900 before sending the first request message or before sending the response message indicating the message , then the processing module 902 also deletes the connection information connected to the S1-AP of the s-eNB after receiving the first request message or the response message of the indication message. At this time, the UE is in the ECM idle state in the MME 900.

If the first request message received by the transceiver module 901 is sent by the s-eNB, the s-eNB can reserve the S1-AP connection with the MME 900 before sending the first request message or before sending the response message indicating the message, then the processing module 902 After receiving the first request message or the response message of the indication message, the S1-AP connection with the s-eNB is also reserved. At this time, the UE is in the ECM connected state in the MME 900.

Preferably, 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, it will further send a paging message to all eNBs managed by the MME 900. The paging message includes the paging identity of the UE and an indication that the UE is in the target state. The indication is used to instruct the eNB receiving the paging message to check whether the paging identity of the UE is stored.

Based on the EPS system shown in FIG. 1 , another MME is disclosed in the embodiment of the present invention. Please refer to FIG. 10. FIG. 10 is a schematic structural diagram of another MME disclosed in an embodiment of the present invention. As shown in Figure 10, the MME 1000 may 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 the target state.

The processor 1002 is configured to initiate a first process according to the first request message to make the UE enter the target state.

Wherein, in 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 transferred between the s-eNB and the t-eNB without updating the S1-U bearer of the UE.

In a specific implementation, the specific manner in which the transceiver 1001 receives the first request message may include:

Manner 1: When the UE is in the ECM connected state, receive a first request message sent by the UE via the s-eNB when there is no data transmission within the first time period.

Manner 2: When the UE is in the ECM connected state, receive the first request message sent by the s-eNB when it detects that the UE has no data transmission within the second time period and the UE is performing a V2X service.

Manner 3: When the UE is in the ECM idle state, the first request message sent by the UE when there is a V2X service transmission requirement is received.

Further, the specific manner in which the processor 1002 initiates the first process according to the first request message to make the UE enter the target state may be:

When the UE is in the ECM connected state and the transceiver 1001 receives the first request message, the transceiver 1001 is controlled to send 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 receives the response message of the second request message sent by the SGW;

The control transceiver 1001 sends an indication message to the s-eNB, so that the s-eNB deletes the relevant information of the SGW in the context of the UE after receiving the indication message, and configures the UE to release the DRB between the s-eNB and the s-eNB .

The above method is applied to the scenario where the UE in the ECM connected state is configured to be in the target state.

Further, the specific manner in which the processor 1002 initiates the first process according to the first request message to make the UE enter the target state may also be:

When the UE is in the ECM idle state, the first request message is an extended service request, and the extended service request includes an identifier indicating that the S1-U bearer and DRB need not be established for the UE, obtain the UE from the context of the UE V2X related information.

The above manner is applied to the scenario where the UE in the ECM idle state is configured as the target state.

Preferably, the indication message sent by the transceiver 1001 to the s-eNB may carry first information, where the first information is used to notify the UE to enter the target state.

Preferably, the transceiver 1001 can also receive a response message to 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 the relevant information of the SGW, and there is a connection between the UE and the s-eNB. The DRB release is complete.

Preferably, if the first request message received by the transceiver 1001 is sent by the UE via the s-eNB, the processor 1002 may also delete the connection with the S1-AP connection of the s-eNB except the MME UE S1 AP ID information, or suspend the S1-AP connection with the s-eNB and instruct the s-eNB to suspend the S1-AP connection with the MME1000. The suspension refers to that the connection information of the S1-AP connection is reserved, but the S1-AP connection is in an inactive state. At this time, the UE is in the ECM idle state in the MME1000.

Preferably, if the first request message received by the transceiver 1001 is sent by the UE via the s-eNB, the processor 1002 can also delete the connection information connected with the S1-AP of the s-eNB, and instruct the s-eNB to delete the connection information with the S1-AP of the s-eNB. Connection information of the S1-AP connection of the MME1000. At this time, the UE is in the ECM idle state in the MME1000.

Preferably, if the first request message received by the transceiver 1001 is sent by the UE via the s-eNB, the processing module 902 may also reserve the S1-AP connection with the s-eNB, and instruct the s-eNB to reserve the S1 connection with the MME1000 -AP connection. At this time, the UE is still in the ECM connected state in the MME1000.

Preferably, if the first request message received by the transceiver 1001 is sent by the s-eNB, the s-eNB can suspend the S1-AP with the MME 1000 before sending the first request message or sending the response message indicating the message connection, then after receiving the first request message or the response message of the indication message, the processor 1002 will also delete the connection information of the S1-AP connection with the s-eNB except the MME UE S1 AP ID, or suspend the connection with the s-eNB. S1-AP connection of s-eNB. At this time, the UE is in the ECM idle state in the MME1000.

Preferably, if the first request message received by the transceiver 1001 is sent by the s-eNB, the s-eNB may delete the S1-AP connection with the MME 1000 before sending the first request message or sending the response message indicating the message connection information, then after receiving the first request message or the response message of the indication message, the processor 1002 will also delete the connection information connected with the S1-AP of the s-eNB. At this time, the UE is in the ECM idle state in the MME1000.

Preferably, if the first request message received by the transceiver 1001 is sent by the s-eNB, 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 of the indication message, the processor 1002 also retains the S1-AP connection with the s-eNB. At this time, the UE is in the ECM connected state in the MME1000.

Preferably, the transceiver 1001 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 MME1000, it will further send a paging message to all eNBs managed by the MME1000. The paging message includes the paging identity of the UE and an indication that the UE is in the target state. The indication is used to instruct the eNB receiving the paging message to check whether the paging identity of the UE is stored.

It can be seen that in the MME described in FIG. 9 or FIG. 10 , after receiving the request message for requesting the UE to enter the target state, the MME will initiate the first process to make the UE enter the target state, so that the UE is in the target state. There is an RRC connection between the downlink and 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. This can not only meet the needs of the UE to perform V2X services in real time through the RRC connection, but when the serving base station of the UE changes, only the context of the UE needs to be transferred between the source base station and the target base station, and there is no need to re-establish the DRB, nor The SGW needs to modify the S1-U bearer of the UE, so that the signaling load on the network side during the handover process of the UE in the RRC connected state can be reduced.

Based on the EPS system shown in FIG. 1 , an embodiment of the present invention discloses a base station eNB. Please refer to FIG. 11. FIG. 11 is a schematic structural diagram of an eNB disclosed in an embodiment of the present invention. As shown in FIG. 11, the eNB 1100 may include a transceiver module 1101 and a processing module 1102, wherein:

The transceiver module 1101 is configured to send a first request message to the MME, where the first request message is used to request that the UE enter the target state. In the target state, there is an RC connection between the UE and the eNB1100, but there is no DRB, and there is no S1-U bearer of the UE between the eNB1100 and the SGW.

The processing module 1102 is configured to control the transmission between the transceiver module 1101 and the t-eNB if the serving base station of the UE changes when the MME initiates the first process according to the first request message to make the UE enter the target state context of the UE.

Therefore, the SGW does not need to update the S1-U bearer of the UE during the handover process.

Further, the transceiver module 1101 may also receive an indication message sent by the MME for the first request message after sending the first request message, where the indication message is used to instruct the eNB 1100 to delete the relevant information of the SGW in the context of the UE, and configure The UE releases the DRB with the eNB1100.

Therefore, the processing module 1102 may also delete the relevant information of the SGW according to the indication message, and configure the UE to release the DRB between the UE and the eNB 1100 .

It should be noted that 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 a response message from the SGW.

Preferably, the indication message received by the transceiver module 1101 may carry first information, where the first information is used to notify the UE to enter the target state. Further, the transceiver module 1101 will also send the first information to the UE to notify the UE to enter the target state.

Preferably, the transceiver module 1101 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 relevant information of the SGW has been deleted and the DRB release between the UE and the eNB 1100 is completed.

Specifically, the first request message sent by the transceiver module 1101 to the MME may be a first request message sent by the UE, and the first request message is sent to the eNB 1100 by the UE when there is no data transmission within the first time period.

Specifically, the first request message sent by the transceiver module 1101 to the MME may also be generated by the processing module 1102 when it detects that the UE has no data transmission within the second time period and the UE is conducting a V2X service.

In an implementation manner, when the instruction message received by the transceiver module 1101 is also used to instruct the eNB 1100 to suspend the S1-AP connection with the MME, the processing module 1102 can also suspend the S1-AP connection with the MME, and at this time The MME side has deleted the connection information of the S1-AP connection with the eNB1100 except the MME UE S1 AP ID or suspended the S1-AP connection with the eNB1100. At this time, the UE is in the ECM idle state in the MME.

Alternatively, when the instruction message received by the transceiver module 1101 is also used to instruct the eNB 1100 to delete the connection information of the S1-AP connection with the MME, the processing module 1102 may also delete the connection information of the S1-AP connection with the MME. At this time, the MME The connection information of the S1-AP connection with the eNB1100 has been deleted. At this time, the UE is in the ECM idle state in the MME.

Alternatively, when the instruction message received by the transceiver module 1101 is also used to instruct the eNB1100 to retain the S1-AP connection with the MME, the processing module 1102 may also retain the S1-AP connection with the MME, and the MME side also retains the S1-AP connection with the eNB1100. S1-AP connection. At this time, the UE is still in the ECM connected state in the MME.

In another implementation manner, before the transceiver module 1101 sends the first request message or the response message indicating the message, the processing module 1102 can also suspend the S1-AP connection with the MME, then the first request message sent by the transceiver module 1101 Alternatively, 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 with the eNB1100 except the MME UE S1 AP ID 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.

Alternatively, before the transceiver module 1101 sends the first request message or the response message of the indication message, the processing module 1102 can also delete the connection information connected to the S1-AP of the MME, then the first request message or indication message sent by the transceiver module 1101 is The response message can 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.

Alternatively, before the transceiver module 1101 sends the first request message or the response message of the indication message, the processing module 1102 retains the S1-AP connection with the MME, then the first request message or the response message of the indication message sent by the transceiver module 1101 may also Used to request the MME to reserve the S1-AP connection with the eNB1100. In this way, the UE can still be in the ECM connected state.

Preferably, when the UE is in the target state and is in the ECM idle state, the transceiver module 1101 may also receive a paging message sent by the MME, where the paging message includes the paging identifier of the UE and an indication that the UE is in the target state. The processing module 1102 can thus check whether the eNB 1100 stores the paging identity of the UE according to the indication. If it is determined that the paging identifier of the UE is stored, the processing module 1102 will control the transceiver module 1101 to establish an S1-AP connection with the MME. If the paging identifier of the UE is not stored, the processing module 1102 will discard the paging message.

Based on the EPS system shown in FIG. 1 , an embodiment of the present invention discloses another eNB. Please refer to FIG. 12. FIG. 12 is a schematic structural diagram of another eNB disclosed in an embodiment of the present invention. As shown in Figure 12, the eNB 1200 may 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 the target state. In the target state, there is an RC connection between the UE and the eNB1200, but there is no DRB, and there is no S1-U bearer of the UE between the eNB1200 and the SGW.

The processor 1202 is configured to control the transmission between the transceiver 1201 and the t-eNB if the serving base station of the UE changes when the MME initiates the first process according to the first request message to make the UE enter the target state context of the UE.

Therefore, the SGW does not need to update the S1-U bearer of the UE during the handover process.

Further, the transceiver 1201 may also receive an indication message sent by the MME for the first request message after sending the first request message, where the indication message is used to instruct the eNB 1200 to delete the relevant information of the SGW in the context of the UE, and configure The UE releases the DRB with eNB1200.

Therefore, the processor 1202 can also delete the relevant information of the SGW according to the instruction message, and configure the UE to release the DRB between the UE and the eNB 1200 .

It should be noted that 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 a response message from the SGW.

Preferably, the indication message received by the transceiver 1201 may carry first information, where the first information is used to notify the UE to enter the target state. Further, the transceiver 1201 will also send the first information to the UE to notify the UE to enter the target state.

Preferably, the transceiver 1201 may also send a response message of the indication message to the MME, wherein the response message of the indication message is used to indicate that the relevant information of the SGW has been deleted and the DRB release between the UE and the eNB1200 is completed.

Specifically, the first request message sent by the transceiver 1201 to the MME may be a first request message sent by the UE, where the first request message is sent to the eNB 1200 when the UE has no data transmission within the first time period.

Specifically, the first request message sent by the transceiver 1201 to the MME may also be generated by the processor 1202 when it detects that the UE has no data transmission within the second time period and the UE is conducting a V2X service.

In an implementation manner, when the instruction message received by the transceiver 1201 is also used to instruct the eNB 1200 to suspend the S1-AP connection with the MME, the processor 1202 may also suspend the S1-AP connection with the MME, and at this time The MME side has deleted the connection information of the S1-AP connection with the eNB1200 except the MME UE S1 AP ID or suspended the S1-AP connection with the eNB1200. At this time, the UE is in the ECM idle state in the MME.

Alternatively, when the instruction message received by the transceiver 1201 is also used to instruct the eNB 1200 to delete the connection information of the S1-AP connection with the MME, the processor 1202 may also delete the connection information of the S1-AP connection with the MME. At this time, the MME The connection information of the S1-AP connection with the eNB1200 has been deleted. At this time, the UE is in the ECM idle state in the MME.

Alternatively, when the instruction message received by the transceiver 1201 is also used to instruct the eNB 1200 to retain the S1-AP connection with the MME, the processor 1202 may also retain the S1-AP connection with the MME, and the MME side also retains the S1-AP connection with the eNB1200. S1-AP connection. At this time, the UE is still in the ECM connected state in the MME.

In another implementation manner, before the transceiver 1201 sends the first request message or the response message indicating the message, the processor 1202 may also suspend the S1-AP connection with the MME, then the first request message sent by the transceiver 1201 Alternatively, 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 with the eNB1200 except the MME UE S1 AP ID 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.

Alternatively, before the transceiver 1201 sends the first request message or the response message of the indication message, the processor 1202 may also delete the connection information connected to the S1-AP of the MME, then the first request message or the indication message sent by the transceiver 1201 has The response message can 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.

Alternatively, before the transceiver 1201 sends the first request message or the response message of the indication message, the processor 1202 retains the S1-AP connection with the MME, then the first request message or the response message of the indication message sent by the transceiver 1201 may also Used to request the MME to reserve the S1-AP connection with the eNB1200. In this way, the UE can still be in the ECM connected state.

Preferably, at the request of the UE being in the target state and in the ECM idle state, the transceiver 1201 may also receive a paging message sent by the MME, where the paging message includes the paging identifier of the UE and an indication that the UE is in the target state. The processor 1202 can thus check whether the eNB 1200 stores the paging identity of the UE according to the indication. If it is determined that the paging identity of the UE is stored, the processor 1202 will control the transceiver 1201 to establish an S1-AP connection with the MME. If the paging identity of the UE is not stored, the processor 1202 will discard the paging message.

It can be seen that in the eNB described in FIG. 11 or FIG. 12 , the eNB may send a first request message to the MME for requesting that the UE enter the target state when the UE in the ECM connected state has no data transmission for a long time. After receiving the request message, the MME will initiate the first procedure to make the UE enter the target state. In the first process, the eNB will delete the relevant information of the SGW according to the instruction, and configure the UE to release the DRB, so that there is an RRC connection between the UE and the base station in the target state, but there is no DRB, and there is no connection between the eNB and the SGW. There is an S1-U bearer for this UE. This can not only meet the requirement that the UE needs to be in the RRC connected state when performing V2X services, but when the serving base station of the UE changes, only the context of the UE needs to be transferred between the source base station and the target base station, and there is no need to re-establish the DRB. , the SGW does not need to modify the S1-U bearer of the UE, so that the signaling load on the network side during the handover process of the UE in the ECM connected state can be reduced.

Based on the EPS system shown in FIG. 1 , an embodiment of the present invention discloses a user terminal UE. Please refer to FIG. 13. FIG. 13 is a schematic structural diagram of a UE disclosed in an embodiment of the present invention. As shown in FIG. 13 , the UE 1300 may include a transceiver module 1301 and a processing module 1302, wherein:

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 the target state. Then, after receiving the first request message, the MME will initiate the first process to make the UE 1300 enter the target state. In the target state, there is an RRC connection between the UE1300 and the s-eNB, but there is no DRB, and there is no S1-U bearer of the UE1300 between the s-eNB and the SGW.

In this way, when the serving base station of the UE1300 changes, the SGW does not need to update the S1-U bearer of the UE1300 during the handover process of the UE1300.

Specifically, before the transceiver module 1301 sends the first request message to the MME, if the UE 1300 is in the ECM connection state, the processing module 1302 may first detect that the UE 1300 has no data transmission for a duration exceeding the first time period, and if the first time period exceeds the processing module 1302 The transceiver module 1301 will be notified, and the transceiver module 1301 will send the first request message to the s-eNB, and the s-eNB will then forward the first request message to the MME.

Specifically, before the transceiver module 1301 sends the first request message to the MME, if the UE 1300 is in the ECM idle state and the UE 1300 has a V2X service transmission requirement, the transceiver module 1301 will send the first request message to the MME. Wherein, 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 DRB need not be established for the UE1300.

Preferably, the transceiver module 1301 may 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.

Preferably, the transceiver module 1301 may also receive the first information sent by the s-eNB, where the first information is used to notify the UE 1300 to enter the target state. The first information may be carried in a configuration message, which is not limited in this embodiment of the present invention.

Based on the EPS system shown in FIG. 1 , another kind of UE is disclosed in the embodiment of the present invention. Please refer to FIG. 14. FIG. 14 is a schematic structural diagram of another UE disclosed in an embodiment of the present invention. As shown in FIG. 14, the UE 1400 may 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 the target state. Then, after receiving the first request message, the MME will initiate the first process to make the UE 1400 enter the target state. In the target state, there is an RRC connection between the UE1400 and the s-eNB, but there is no DRB, and there is no S1-U bearer of the UE1400 between the s-eNB and the SGW.

In this way, when the serving base station of the UE1400 changes, the SGW does not need to update the S1-U bearer of the UE1400 during the handover process of the UE1400.

Specifically, before the transceiver 1401 sends the first request message to the MME, if the UE 1400 is in the ECM connection state, the processor 1402 may first detect that the UE 1300 has no data transmission for longer than the first time period, and if the first time period exceeds the processing module 1302 The transceiver 1401 will be notified, and the transceiver 1401 will send the first request message to the s-eNB, and the s-eNB will then forward the first request message to the MME.

Specifically, before the transceiver 1401 sends the first request message to the MME, if the UE 1400 is in the ECM idle state and the UE 1400 has a V2X service transmission requirement, the transceiver 1401 sends the first request message to the MME. Wherein, 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 DRB need not be established for the UE1400.

Preferably, the transceiver 1401 may 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.

Preferably, the transceiver 1401 may also receive the first information sent by the s-eNB, where the first information is used to notify the UE 1400 to enter the target state. The first information may be carried in a configuration message, which is not limited in this embodiment of the present invention.

It can be seen that in the UE described in FIG. 13 or FIG. 14 , if the UE is in the ECM connected state, the UE will send a first request message to the MME for requesting that the UE enter the target state when there is no data transmission for a long time. ; If the UE is in the ECM idle state, the UE will send a first request message to the MME for requesting the UE to enter the target state when there is a need for V2X service transmission. After receiving the request message, the MME will initiate the first procedure to make the UE enter the target state. Therefore, there is an RRC connection between the UE and 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. This can not only meet the requirement that the UE needs to be in the RRC connected state when performing V2X services, but when the serving base station of the UE changes, only the context of the UE needs to be transferred between the source base station and the target base station, and there is no need to re-establish the DRB. , the SGW does not need to modify the S1-U bearer of the UE, so that the signaling load on the network side during the handover process of the UE in the ECM connected state can be reduced.

Based on the EPS system shown in FIG. 1 , an embodiment of the present invention discloses a UE management system. Please refer to FIG. 15. FIG. 15 is a schematic structural diagram of a UE management system disclosed in an embodiment of the present invention. As shown in FIG. 15, the system may include UE151, s-eNB152, MME153, SGW154 and t-eNB155, wherein:

UE151 and s-eNB152 are connected through Uu interface, s-eNB152 and t-eNB155 and MME153 are connected through S1 interface, s-eNB152 and t-eNB155 and SGW154 are also connected through S1 interface, s-eNB152 and t -The eNBs 155 are connected through the X2 interface, and the MME 153 and the SGW 154 are connected through the S11 interface.

When the UE 151 is in the ECM idle state and there is a V2X service transmission, the UE 151 will 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 the first request message to the MME 153 when the UE 151 is in the ECM connection state and there is no data transmission for a long time.

The s-eNB 152 may also send the first request message to the MME 153 when detecting that the UE 151 in the ECM connected state has no data transmission for a long time.

After receiving the first request message, the MME 153 initiates the first process to make the UE 151 enter the target state. In the target state, there is an RRC connection between the UE151 and the s-eNB152, but there is no DRB, and there is no S1-U bearer of the UE151 between the s-eNB152 and the SGW154. In this way, when 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 does not need to update the S1-U bearer of the UE 151 .

Specifically, if the UE151 is currently in the ECM connected state, then the first process requires the SGW154 to delete the S1-U bearer of the UE151 with the s-eNB152; the s-eNB152 also needs to delete the relevant information of the SGW154 from the context of the UE151; The UE 151 also needs to delete the DRB with the s-eNB 152 .

Specifically, if the UE151 is currently in the ECM idle state, the first process only requires the s-eNB152 to establish a V2X-related context for the UE151, and does not require the establishment of the S1-U bearer of the UE151 between the s-eNB152 and the SGW154, nor does the s-eNB151 - eNB 152 configures DRB for UE 151.

It can be seen that in the management system of the UE shown in FIG. 15, after receiving the request message for requesting the UE to enter the target state, the MME will initiate the first process to make the UE enter the target state, so that the UE is in the target state There is an RRC connection between the downlink and 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. This can not only meet the needs of the UE to perform V2X services in real time through the RRC connection, but when the serving base station of the UE changes, only the context of the UE needs to be transferred between the source base station and the target base station, and there is no need to re-establish the DRB, nor The SGW needs to modify the S1-U bearer of the UE, so that the signaling load on the network side during the handover process of the UE in the RRC connected state can be reduced.

It should be noted that, in the foregoing embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

The steps in the method of the embodiment of the present invention may be adjusted, combined and deleted in sequence according to actual needs.

The modules in the MME, the eNB and the UE in the embodiment of the present invention can be combined, divided and deleted according to actual needs.

The MME, eNB, and UE described in the embodiments of the present invention may be implemented by a general integrated circuit, such as a CPU (Central Processing Unit, central processing unit), or an ASIC (Application Specific Integrated Circuit, application specific integrated circuit).

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program is in During execution, it may include the processes of the embodiments of the above-mentioned methods. The storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM) or the like.

A method for managing a user terminal and related equipment disclosed in the embodiments of the present invention have been described above in detail. The principles and implementations of the present invention are described with specific examples in this paper. invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. Invention limitations.

Claims (72)

1. A management method of a user terminal (UE) is applied to a Mobile Management Entity (MME), and is characterized by comprising the following steps:

the MME receives a first request message, wherein the first request message is used for requesting the UE to enter a target state;

the MME initiates a first process according to the first request message to enable the UE to enter the target state; in the target state, Radio Resource Control (RRC) connection exists between the UE and a source base station S-eNB, a Data Radio Bearer (DRB) does not exist, a user plane interface (S1-U) bearer of the UE does not exist between the S-eNB and a Serving Gateway (SGW), and the context of the UE is transferred between the S-eNB and a target base station t-eNB under the condition that a serving base station of the UE is changed;

wherein,

if the UE is in an EPS Connection Management (ECM) connected state, the first process comprises: after receiving the first request message, the MME sends a second request message to the SGW, wherein the second request message is used for requesting the SGW to delete the S1-U bearer of the UE; the MME receives a response message of the second request message sent by the SGW; the MME sends an indication message to the s-eNB so that the s-eNB deletes relevant information of the SGW in the context of the UE and configures the UE to release DRB between the S-eNB and the UE;

wherein,

if the MME receives a first request message sent by a UE in an ECM-connected state via an s-eNB, the method further comprises: after receiving the first request message, the MME deleting connection information of S1-AP connections of the S-eNB except for a control plane interface S1-AP connection identification MME UE S1 AP ID of the UE in the MME or suspending S1-AP connections with the S-eNB and instructing the S-eNB to suspend S1-AP connections with the MME;

or after receiving the first request message, the MME deletes the connection information of S1-AP connection with the S-eNB and instructs the S-eNB to delete the connection information of S1-AP connection with the MME;

or after receiving the first request message, the MME reserves S1-AP connection with the S-eNB and instructs the S-eNB to reserve S1-AP connection with the MME;

or,

wherein, if the MME receives a first request message sent by an s-eNB, the method further comprises: the MME deletes connection information of S1-AP connection of the S-eNB except MME UE S1 AP ID or suspends S1-AP connection of the S-eNB after receiving the first request message;

or, after receiving the first request message, the MME deletes connection information connected to S1-AP of the S-eNB;

or the MME reserves S1-AP connection with the S-eNB after receiving the first request message.

2. The method of claim 1, wherein the MME receives a first request message comprising:

the MME receives a first request message sent by the UE in an Evolved Packet System (EPS) connection management (ECM) connection state through an s-eNB under the condition that no data is transmitted in a first time period;

or,

the MME receives a first request message sent by an s-eNB under the condition that the s-eNB detects that the UE in an ECM connection state has no data transmission in a second time period and the UE is carrying out vehicle and external V2X service;

or,

the MME receives a first request message sent by a UE in an ECM idle state under the condition that V2X service transmission is required.

3. The method of claim 1, wherein the indication message carries first information, and wherein the first information is used to notify the UE to enter the target state.

4. The method of claim 2, wherein the indication message carries first information, and wherein the first information is used to notify the UE to enter the target state.

5. The method of any of claims 1 to 4, wherein after the MME sends an indication message to the s-eNB, the method further comprises:

and the MME receives a response message of the indication message sent by the s-eNB, wherein the response message of the indication message is used for indicating that the related information of the SGW is deleted and the DRB release between the UE and the s-eNB is completed.

6. The method according to claim 1 or 2, wherein if the UE is in ECM idle state, the first request message is an extended service request including an identity indicating that no S1-U bearers and DRBs need to be established for the UE, and the first procedure comprises:

the MME acquires V2X related information of the UE from the context of the UE;

the MME sends a third request message to the s-eNB according to the extended service request, wherein the third request message comprises V2X related information of the UE, and the third request message is used for requesting the s-eNB to establish a V2X related context for the UE.

7. The method according to any of claims 1 to 4, wherein after the MME initiates a first procedure to cause the UE to enter the target state according to the first request message, the method further comprises:

the MME receives a downlink service transmission notification of the UE sent by the SGW;

if the UE is in the target state and in an ECM idle state, the MME sends a paging message to an eNB managed by the MME, wherein the paging message comprises a paging identifier of the UE and an indication that the UE is in the target state, and the indication is used for indicating the eNB receiving the paging message to check whether the paging identifier of the UE is stored.

8. A management method of a user terminal (UE) is applied to a Mobile Management Entity (MME), and is characterized by comprising the following steps:

the MME receives a first request message, wherein the first request message is used for requesting the UE to enter a target state;

the MME initiates a first process according to the first request message to enable the UE to enter the target state; in the target state, Radio Resource Control (RRC) connection exists between the UE and a source base station S-eNB, a Data Radio Bearer (DRB) does not exist, a user plane interface (S1-U) bearer of the UE does not exist between the S-eNB and a Serving Gateway (SGW), and the context of the UE is transferred between the S-eNB and a target base station t-eNB under the condition that a serving base station of the UE is changed;

wherein,

if the UE is in an eps connection management, ECM, idle state, and the first request message is an extended service request including an identifier indicating that S1-U bearers and DRBs do not need to be established for the UE, the first procedure includes:

the MME acquires V2X related information of the UE from the context of the UE;

the MME sends a third request message to the s-eNB according to the extended service request, wherein the third request message comprises V2X related information of the UE, and the third request message is used for requesting the s-eNB to establish a V2X related context for the UE.

9. A management method of a user terminal (UE) is applied to a Mobile Management Entity (MME), and is characterized by comprising the following steps:

the MME receives a first request message, wherein the first request message is used for requesting the UE to enter a target state;

the MME initiates a first process according to the first request message to enable the UE to enter the target state; in the target state, Radio Resource Control (RRC) connection exists between the UE and a source base station S-eNB, a Data Radio Bearer (DRB) does not exist, a user plane interface (S1-U) bearer of the UE does not exist between the S-eNB and a Serving Gateway (SGW), and the context of the UE is transferred between the S-eNB and a target base station t-eNB under the condition that a serving base station of the UE is changed;

wherein,

after the MME initiates a first procedure to cause the UE to enter the target state according to the first request message, the method further includes:

the MME receives a downlink service transmission notification of the UE sent by the SGW;

if the UE is in the target state and in an Evolved Packet System (EPS) connection management (ECM) idle state, the MME sends a paging message to an evolved node B (eNB) managed by the MME, wherein the paging message comprises a paging identifier of the UE and an indication that the UE is in the target state, and the indication is used for indicating the eNB receiving the paging message to check whether the paging identifier of the UE is stored.

10. A management method of UE is applied to an s-eNB, and is characterized in that the method comprises the following steps:

the s-eNB sends a first request message to an MME, wherein the first request message is used for requesting to enable UE to enter a target state; in the target state, RRC connection exists between the UE and the S-eNB, no DRB exists, and an S1-U bearer of the UE does not exist between the S-eNB and the SGW;

when the MME initiates a first process according to the first request message to enable the UE to enter the target state and a serving base station of the UE changes, transferring the context of the UE between the s-eNB and the t-eNB;

wherein after the s-eNB sends the first request message to the MME and before the context of the UE is transferred between the s-eNB and the t-eNB, the method further comprises:

the s-eNB receives an indication message sent by the MME aiming at the first request message, wherein the indication message is used for indicating the s-eNB to delete the related information of the SGW in the context of the UE and configuring the UE to release the DRB between the S-eNB and the UE;

the s-eNB deletes the related information of the SGW in the context of the UE according to the indication message and configures the UE to release the DRB between the S-eNB and the S-eNB;

wherein, before the s-eNB sends the first request message to the MME, the method further comprises:

the method comprises the steps that the s-eNB receives a first request message sent by UE, and the first request message is sent to the s-eNB by the UE in an Evolved Packet System (EPS) connection management (ECM) connection state under the condition that no data is transmitted in a first time period;

wherein after the s-eNB receives the indication message sent by the MME for the first request message, the method further comprises:

the indication message is further used for indicating the S-eNB to suspend an S1-AP connection with the MME, and the S-eNB to suspend an S1-AP connection with the MME;

or,

the indication message is also used for indicating the S-eNB to delete 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;

or,

the indication message is also used to indicate that the S-eNB reserves an S1-AP connection with the MME, and that the S-eNB reserves an S1-AP connection with the MME.

11. The method of claim 10, wherein the indication message carries first information, and wherein the first information is used to notify the UE to enter the target state.

12. The method of claim 10, wherein after the s-eNB deletes the related information of the SGW in the context of the UE according to the indication message and configures the UE to release DRBs with the s-eNB, the method further comprises:

the s-eNB sends a response message of the indication message to the MME, wherein the response message of the indication message is used for indicating that the related information of the SGW is deleted and DRB release between the UE and the s-eNB is completed.

13. The method of claim 11, wherein after the s-eNB deletes the related information of the SGW in the context of the UE according to the indication message and configures the UE to release DRBs with the s-eNB, the method further comprises:

the s-eNB sends a response message of the indication message to the MME, wherein the response message of the indication message is used for indicating that the related information of the SGW is deleted and DRB release between the UE and the s-eNB is completed.

14. The method of any of claims 10 to 13, wherein the UE is in the target state and in an ECM idle state in case the S-eNB suspends S1-AP connection with the MME or deletes connection information of S1-AP connection with the MME, the method further comprising:

the s-eNB receives a paging message sent by the MME, wherein the paging message comprises a paging identifier of the UE and an indication that the UE is in the target state;

the s-eNB checks whether the s-eNB stores the paging identifier of the UE or not according to the indication;

the S-eNB establishes S1-AP connection with the MME under the condition that the paging identifier of the UE is determined to be stored;

and the s-eNB discards the paging message under the condition of determining that the paging identifier of the UE is not stored.

15. A management method of UE is applied to an s-eNB, and is characterized in that the method comprises the following steps:

the s-eNB sends a first request message to an MME, wherein the first request message is used for requesting to enable UE to enter a target state; in the target state, RRC connection exists between the UE and the S-eNB, no DRB exists, and an S1-U bearer of the UE does not exist between the S-eNB and the SGW;

when the MME initiates a first process according to the first request message to enable the UE to enter the target state and a serving base station of the UE changes, transferring the context of the UE between the s-eNB and the t-eNB;

wherein, before the s-eNB sends the first request message to the MME, the method further comprises:

the s-eNB detects that the UE in the ECM connection state has no data transmission in a second time period;

the s-eNB detecting that the UE is performing V2X traffic;

wherein after the s-eNB detects that the UE is performing a V2X service and before the s-eNB sends a first request message to an MME, the method further comprises:

the S-eNB suspends the S1-AP connection with the MME, the first request message further for requesting the MME to delete connection information of S1-AP connections with the S-eNB other than an MME UE S1 AP ID or suspend the S1-AP connection with the S-eNB;

or,

the S-eNB deletes connection information of S1-AP connection with the MME, and the first request message is also used for requesting the MME to delete connection information of S1-AP connection with the S-eNB;

or,

the S-eNB reserves an S1-AP connection with the MME, the first request message further for requesting the MME to reserve an S1-AP connection with the S-eNB.

16. The method of claim 15, wherein after the s-eNB sends the first request message to an MME and before the context of the UE is transferred between the s-eNB and a t-eNB, the method further comprises:

the s-eNB receives an indication message sent by the MME aiming at the first request message, wherein the indication message is used for indicating the s-eNB to delete the related information of the SGW in the context of the UE and configuring the UE to release the DRB between the S-eNB and the UE;

and the s-eNB deletes the related information of the SGW in the context of the UE according to the indication message and configures the UE to release the DRB between the S-eNB and the S-eNB.

17. The method of claim 16, wherein the indication message carries first information, and wherein the first information is used to notify the UE to enter the target state.

18. The method of claim 15, 16 or 17, wherein in case the S-eNB suspends S1-AP connection with the MME or deletes connection information for S1-AP connection with the MME, the UE is in the target state and in an evolved packet system connection management, ECM, idle state, the method further comprising:

the s-eNB receives a paging message sent by the MME, wherein the paging message comprises a paging identifier of the UE and an indication that the UE is in the target state;

the s-eNB checks whether the s-eNB stores the paging identifier of the UE or not according to the indication;

the S-eNB establishes S1-AP connection with the MME under the condition that the paging identifier of the UE is determined to be stored;

and the s-eNB discards the paging message under the condition of determining that the paging identifier of the UE is not stored.

19. A management method of UE is applied to the UE, and is characterized in that the method comprises the following steps:

the UE sends a first request message to an MME, wherein the first request message is used for requesting the UE to enter a target state, in the target state, RRC connection exists between the UE and an S-eNB, DRB does not exist, and S1-U load of the UE does not exist between the S-eNB and an SGW;

under the condition that the UE is in an ECM idle state, the UE sends a first request message to an MME, and the first request message comprises the following steps:

the UE sends a first request message to an MME under the condition that V2X service transmission is required, wherein the first request message is an extended service request which comprises an identifier used for indicating that S1-U bearing and DRB do not need to be established for the UE;

wherein the extended service request is used for triggering the MME to acquire V2X-related information of the UE from the context of the UE; transmitting a third request message to the s-eNB according to the extended service request, the third request message including V2X-related information of the UE, the third request message for requesting the s-eNB to establish a V2X-related context for the UE.

20. The method of claim 19, wherein before the UE sends the first request message to an MME with the UE in an ECM-connected state, the method further comprises:

the UE detects that the UE has no data transmission in a first time period;

the UE sends a first request message to an MME, and the first request message comprises the following steps:

the UE sends a first request message to an MME via an s-eNB.

21. The method of claim 19, wherein after the UE sends the first request message to the MME, the method further comprises:

the UE receives a configuration message which is sent by the s-eNB and used for indicating the DRB release;

the UE releases the DRB with the s-eNB.

22. The method of claim 19, wherein after the UE sends the first request message to the MME, the method further comprises:

and the UE receives first information sent by the s-eNB, wherein the first information is used for informing the UE of entering the target state.

23. The method of claim 21, wherein after the UE sends the first request message to the MME, the method further comprises:

and the UE receives first information sent by the s-eNB, wherein the first information is used for informing the UE of entering the target state.

24. An MME, wherein the MME comprises:

a transceiver module, configured to receive a first request message, where the first request message is used to request that a UE enter a target state;

a processing module, configured to initiate a first procedure according to the first request message to enable the UE to enter the target state; in the target state, RRC connection exists between the UE and an S-eNB, no DRB exists, S1-U load of the UE does not exist between the S-eNB and an SGW, and the context of the UE is transferred between the S-eNB and a t-eNB under the condition that a serving base station of the UE changes;

the specific way for the processing module to initiate the first process according to the first request message to enable the UE to enter the target state is as follows:

controlling the transceiver module to send a second request message to the SGW when the UE is in an EPS (evolved packet System) connection management (ECM) connected state and the transceiver module receives the first request message, wherein the second request message is used for requesting the SGW to delete an S1-U bearer of the UE; controlling the transceiver module to receive a response message of the second request message sent by the SGW; controlling the transceiver module to send an indication message to the s-eNB, so that the s-eNB deletes relevant information of the SGW in the context of the UE and configures the UE to release a DRB with the s-eNB;

wherein,

the processing module is further used for deleting connection information of S1-AP connection with the S-eNB except MME UE S1 AP ID or suspending S1-AP connection with the S-eNB and indicating the S-eNB to suspend S1-AP connection with the MME if the transceiving module receives a first request message sent by the UE in ECM connection state through the S-eNB; or deleting the connection information of the S1-AP connection with the S-eNB and instructing the S-eNB to delete the connection information of the S1-AP connection with the MME; or, reserving an S1-AP connection with the S-eNB and instructing the S-eNB to reserve an S1-AP connection with the MME;

or,

wherein,

the processing module is further configured to delete connection information of S1-AP connections of the S-eNB except MME UE S1 AP ID or suspend S1-AP connections of the S-eNB in case the transceiving module receives a first request message transmitted by the S-eNB; or deleting the connection information connected with the S1-AP of the S-eNB; alternatively, the S1-AP connection with the S-eNB is reserved.

25. The MME of claim 24, wherein the transceiver module receives the first request message in a manner that:

receiving a first request message sent by a UE in an ECM connection state through an s-eNB under the condition that no data is transmitted in a first time period;

or,

receiving a first request message sent by an s-eNB on the condition that the UE in an ECM connection state is detected to have no data transmission in a second time period and the UE is carrying out V2X service;

or,

receiving a first request message sent by a UE in an ECM idle state under the condition that V2X service transmission is required.

26. The MME of claim 24, wherein the indication message carries first information for informing the UE to enter the target state.

27. The MME of claim 25, wherein the indication message carries first information for informing the UE to enter the target state.

28. The MME of any one of claims 24 to 27,

the transceiver module is further configured to receive a response message from the s-eNB, where the response message of the indication message is used to indicate that the relevant information of the SGW is deleted and the DRB release between the UE and the s-eNB is completed.

29. The MME of claim 24 or 25, wherein the processing module initiates a first procedure to bring the UE into the target state according to the first request message by:

acquiring V2X-related information of the UE from the context of the UE under the condition that the UE is in an ECM idle state, the first request message is an extended service request, and the extended service request comprises an identification for indicating that S1-U bearing and DRB do not need to be established for the UE;

controlling the transceiver module to transmit a third request message to the s-eNB according to the extended service request, the third request message including V2X-related information of the UE, the third request message for requesting the s-eNB to establish a V2X-related context for the UE.

30. The MME of any one of claims 24 to 27,

the transceiver module is further configured to receive a downlink service transmission notification of the UE sent by the SGW;

the transceiver module is further configured to send a paging message to an eNB managed by the MME when the UE is in the target state and in an ECM idle state, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state, and the indication is used to indicate that the eNB receiving the paging message checks whether the paging identifier of the UE is stored.

31. An MME, wherein the MME comprises:

a transceiver module, configured to receive a first request message, where the first request message is used to request that a UE enter a target state;

a processing module, configured to initiate a first procedure according to the first request message to enable the UE to enter the target state; in the target state, RRC connection exists between the UE and an S-eNB, no DRB exists, S1-U load of the UE does not exist between the S-eNB and an SGW, and the context of the UE is transferred between the S-eNB and a t-eNB under the condition that a serving base station of the UE changes;

the specific way for the processing module to initiate the first process according to the first request message to enable the UE to enter the target state is as follows:

acquiring V2X-related information of the UE from the context of the UE under the condition that the UE is in an Evolved Packet System (EPS) connection management (ECM) idle state, the first request message is an extended service request, and the extended service request comprises an identifier for indicating that S1-U bearing and DRB do not need to be established for the UE;

controlling the transceiver module to transmit a third request message to the s-eNB according to the extended service request, the third request message including V2X-related information of the UE, the third request message for requesting the s-eNB to establish a V2X-related context for the UE.

32. An MME, wherein the MME comprises:

a transceiver module, configured to receive a first request message, where the first request message is used to request that a UE enter a target state;

a processing module, configured to initiate a first procedure according to the first request message to enable the UE to enter the target state; in the target state, RRC connection exists between the UE and an S-eNB, no DRB exists, S1-U load of the UE does not exist between the S-eNB and an SGW, and the context of the UE is transferred between the S-eNB and a t-eNB under the condition that a serving base station of the UE changes;

the transceiver module is further configured to receive a downlink service transmission notification of the UE sent by the SGW;

the transceiver module is further configured to send a paging message to an eNB managed by the MME when the UE is in the target state and in an evolved packet system (eps) connection management (ECM) idle state, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state, and the indication is used to indicate that the eNB receiving the paging message checks whether the paging identifier of the UE is stored.

33. An MME, wherein the MME comprises:

a transceiver for receiving a first request message for requesting to bring a UE into a target state;

a processor configured to initiate a first procedure to cause the UE to enter the target state according to the first request message; in the target state, RRC connection exists between the UE and an S-eNB, no DRB exists, S1-U load of the UE does not exist between the S-eNB and an SGW, and the context of the UE is transferred between the S-eNB and a t-eNB under the condition that a serving base station of the UE changes;

the specific way for the processor to initiate the first process according to the first request message to cause the UE to enter the target state is as follows:

controlling the transceiver to send a second request message to the SGW when the UE is in an EPS (evolved packet System) connection management (ECM) connected state and the transceiver receives the first request message, wherein the second request message is used for requesting the SGW to delete an S1-U bearer of the UE;

controlling the transceiver to receive a response message of the second request message sent by the SGW;

controlling the transceiver to send an indication message to the s-eNB so that the s-eNB deletes relevant information of the SGW in the context of the UE and configures the UE to release a DRB with the s-eNB;

wherein the processor is further configured to delete connection information of S1-AP connections other than MME UE S1 AP ID with the S-eNB or suspend S1-AP connections with the S-eNB and instruct the S-eNB to suspend S1-AP connections with the MME, in case the transceiver receives a first request message transmitted by a UE in ECM connected state via the S-eNB; or deleting the connection information of the S1-AP connection with the S-eNB and instructing the S-eNB to delete the connection information of the S1-AP connection with the MME; or, reserving an S1-AP connection with the S-eNB and instructing the S-eNB to reserve an S1-AP connection with the MME;

or,

wherein,

the processor further configured to delete connection information of S1-AP connections with the S-eNB except MME UE S1 AP ID or suspend S1-AP connections with the S-eNB in case of a first request message transmitted by the transceiver by the S-eNB; or deleting the connection information connected with the S1-AP of the S-eNB; alternatively, the S1-AP connection with the S-eNB is reserved.

34. The MME of claim 33, wherein the transceiver receives the first request message by:

receiving a first request message sent by a UE in an ECM connection state through an s-eNB under the condition that no data is transmitted in a first time period;

or,

receiving a first request message sent by an s-eNB on the condition that the UE in an ECM connection state is detected to have no data transmission in a second time period and the UE is carrying out V2X service;

or,

receiving a first request message sent by a UE in an ECM idle state under the condition that V2X service transmission is required.

35. The MME of claim 33, wherein the indication message carries first information for informing the UE to enter the target state.

36. The MME of claim 34, wherein the indication message carries first information for informing the UE to enter the target state.

37. The MME of any one of claims 33 to 36,

the transceiver is further configured to receive a response message from the s-eNB, where the response message is used to indicate that the related information of the SGW is deleted and the DRB release between the UE and the s-eNB is completed.

38. The MME of claim 33 or 34, wherein the processor initiates the first procedure to bring the UE into the target state according to the first request message by:

acquiring V2X-related information of the UE from the context of the UE under the condition that the UE is in an ECM idle state, the first request message is an extended service request, and the extended service request comprises an identification for indicating that S1-U bearing and DRB do not need to be established for the UE;

controlling the transceiver to transmit a third request message to the s-eNB according to the extended service request, the third request message including V2X-related information of the UE, the third request message for requesting the s-eNB to establish a V2X-related context for the UE.

39. The MME of any one of claims 33 to 36,

the transceiver is further configured to receive a downlink service transmission notification of the UE sent by the SGW;

the transceiver is further configured to send a paging message to an eNB managed by the MME when the UE is in the target state and in an ECM idle state, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state, and the indication is used to indicate that the eNB receiving the paging message checks whether the paging identifier of the UE is stored.

40. An MME, wherein the MME comprises:

a transceiver for receiving a first request message for requesting to bring a UE into a target state;

a processor configured to initiate a first procedure to cause the UE to enter the target state according to the first request message; in the target state, RRC connection exists between the UE and an S-eNB, no DRB exists, S1-U load of the UE does not exist between the S-eNB and an SGW, and the context of the UE is transferred between the S-eNB and a t-eNB under the condition that a serving base station of the UE changes;

the specific way for the processor to initiate the first process according to the first request message to cause the UE to enter the target state is as follows:

acquiring V2X-related information of the UE from the context of the UE under the condition that the UE is in an Evolved Packet System (EPS) connection management (ECM) idle state, the first request message is an extended service request, and the extended service request comprises an identifier for indicating that S1-U bearing and DRB do not need to be established for the UE;

controlling the transceiver to transmit a third request message to the s-eNB according to the extended service request, the third request message including V2X-related information of the UE, the third request message for requesting the s-eNB to establish a V2X-related context for the UE.

41. An MME, wherein the MME comprises:

a transceiver for receiving a first request message for requesting to bring a UE into a target state;

a processor configured to initiate a first procedure to cause the UE to enter the target state according to the first request message; in the target state, RRC connection exists between the UE and an S-eNB, no DRB exists, S1-U load of the UE does not exist between the S-eNB and an SGW, and the context of the UE is transferred between the S-eNB and a t-eNB under the condition that a serving base station of the UE changes;

wherein,

the transceiver is further configured to receive a downlink service transmission notification of the UE sent by the SGW;

the transceiver is further configured to send a paging message to an eNB managed by the MME when the UE is in the target state and in an evolved packet system connection management (ECM) idle state, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state, and the indication is used to indicate that the eNB receiving the paging message checks whether the paging identifier of the UE is stored.

42. A base station (eNB), the eNB comprising:

a transceiving module, configured to send a first request message to an MME, where the first request message is used to request that a UE enter a target state; in the target state, an RRC connection exists between the UE and the eNB, no DRB exists, and no S1-U bearer of the UE exists between the eNB and the SGW;

a processing module, configured to control the transceiver module and the t-eNB to transfer a context of the UE when the MME initiates a first procedure according to the first request message to enable the UE to enter the target state and a serving base station of the UE changes;

wherein,

the transceiver module is further configured to receive an indication message sent by the MME for the first request message, where the indication message is used to instruct the eNB to delete the relevant information of the SGW in the context of the UE, and configure the UE to release the DRB with the eNB;

the processing module is further configured to delete the relevant information of the SGW in the context of the UE according to the indication message, and configure the UE to release the DRB with the eNB;

wherein,

the transceiver module is further configured to receive a first request message sent by the UE, where the first request message is sent to the eNB by the UE in an EMC connected state in a first time period without data transmission;

wherein the processing module is further configured to suspend the S1-AP connection with the MME if the indication message is further configured to indicate that the eNB suspends the S1-AP connection with the MME; or, in case that the indication message is further used for indicating the eNB to delete the connection information of the S1-AP connection with the MME, deleting the connection information of the S1-AP connection with the MME; or reserving the S1-AP connection with the MME if the indication message is also used for indicating that the eNB reserves the S1-AP connection with the MME.

43. The eNB of claim 42, wherein said indication message carries first information for informing said UE to enter said target state.

44. The eNB of claim 42,

the transceiver module is further configured to send a response message to the MME, where the response message to the indication message is used to indicate that the relevant information of the SGW is deleted and the DRB release between the UE and the eNB is completed.

45. The eNB of claim 43,

the transceiver module is further configured to send a response message to the MME, where the response message to the indication message is used to indicate that the relevant information of the SGW is deleted and the DRB release between the UE and the eNB is completed.

46. The eNB of any one of claims 42 to 45, wherein said UE is in said target state and in ECM idle state in case said processing module suspends S1-AP connection with said MME or deletes connection information of S1-AP connection with said MME;

the transceiver module is further configured to receive a paging message sent by the MME, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state;

the processing module is further configured to check whether the eNB stores the paging identifier of the UE according to the indication; under the condition that the paging identification of the UE is determined to be stored, establishing S1-AP connection with the MME; and discarding the paging message under the condition that the paging identification of the UE is not stored.

47. A base station (eNB), the eNB comprising:

a transceiving module, configured to send a first request message to an MME, where the first request message is used to request that a UE enter a target state; in the target state, an RRC connection exists between the UE and the eNB, no DRB exists, and no S1-U bearer of the UE exists between the eNB and the SGW;

a processing module, configured to control the transceiver module and the t-eNB to transfer a context of the UE when the MME initiates a first procedure according to the first request message to enable the UE to enter the target state and a serving base station of the UE changes;

wherein,

the processing module is further configured to detect that the UE in an eps connection management ECM connected state has no data transmission in a second time period, and detect that the UE is performing a V2X service;

wherein,

the processing module is further configured to suspend an S1-AP connection with the MME, and the first request message is further configured to request the MME to delete connection information of S1-AP connections with the eNB except an MME UE S1 AP ID or suspend an S1-AP connection with the eNB; or deleting the connection information of the S1-AP connection with the MME, wherein the first request message is also used for requesting the MME to delete the connection information of the S1-AP connection with the eNB; or reserving the S1-AP connection with the MME, wherein the first request message is also used for requesting the MME to reserve the S1-AP connection with the eNB.

48. The eNB of claim 47, wherein the transceiving module is further configured to receive an indication message sent by the MME for the first request message, wherein the indication message is used to instruct the eNB to delete the related information of the SGW in the context of the UE and configure the UE to release the DRB with the eNB;

the processing module is further configured to delete the relevant information of the SGW in the context of the UE according to the indication message, and configure the UE to release the DRB with the eNB.

49. The eNB of claim 48, wherein said indication message carries first information for informing said UE to enter said target state.

50. The eNB of claim 47 or 48 or 49, wherein said UE is in said target state and in ECM idle state in case said processing module suspends S1-AP connection with said MME or deletes connection information of S1-AP connection with said MME;

the transceiver module is further configured to receive a paging message sent by the MME, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state;

the processing module is further configured to check whether the eNB stores the paging identifier of the UE according to the indication; under the condition that the paging identification of the UE is determined to be stored, establishing S1-AP connection with the MME; and discarding the paging message under the condition that the paging identification of the UE is not stored.

51. An eNB, comprising:

a transceiver, configured to send a first request message to an MME, where the first request message is used to request that a UE enter a target state; in the target state, an RRC connection exists between the UE and the eNB, no DRB exists, and no S1-U bearer of the UE exists between the eNB and the SGW;

a processor, configured to control the transceiver and the t-eNB to transfer a context of the UE when the MME initiates a first procedure to cause the UE to enter the target state according to the first request message and a serving base station of the UE changes;

wherein,

the transceiver is further configured to receive an indication message sent by the MME for the first request message, where the indication message is used to instruct the eNB to delete the relevant information of the SGW in the context of the UE, and configure the UE to release the DRB with the eNB;

the processor is further configured to delete the relevant information of the SGW in the context of the UE according to the indication message, and configure the UE to release the DRB with the eNB;

wherein,

the transceiver is further configured to receive a first request message sent by the UE, where the first request message is sent to the eNB by the UE in an ECM connected state in a case that there is no data transmission within a first time period;

wherein,

the processor is further configured to suspend an S1-AP connection with the MME if the indication message is further configured to indicate that the eNB suspends an S1-AP connection with the MME; or deleting the connection information connected with the S1-AP of the MME; alternatively, the S1-AP connection with the MME is retained.

52. The eNB of claim 51, wherein the indication message carries first information for informing the UE to enter the target state.

53. The eNB of claim 51, wherein the base station is configured to,

the transceiver is further configured to send a response message to the MME, where the response message to the indication message is used to indicate that the relevant information of the SGW is deleted and the DRB release between the UE and the eNB is completed.

54. The eNB of claim 52, wherein,

the transceiver is further configured to send a response message to the MME, where the response message to the indication message is used to indicate that the relevant information of the SGW is deleted and the DRB release between the UE and the eNB is completed.

55. The eNB of any one of claims 51 to 54, wherein in case the processor suspends S1-AP connection with the MME or deletes connection information of S1-AP connection with the MME, the UE is in the target state and in ECM idle state;

the transceiver is further configured to receive a paging message sent by the MME, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state;

the processor is further configured to check whether the eNB stores the paging identifier of the UE according to the indication; under the condition that the paging identification of the UE is determined to be stored, establishing S1-AP connection with the MME; and discarding the paging message under the condition that the paging identification of the UE is not stored.

56. An eNB, comprising:

a transceiver, configured to send a first request message to an MME, where the first request message is used to request that a UE enter a target state; in the target state, an RRC connection exists between the UE and the eNB, no DRB exists, and no S1-U bearer of the UE exists between the eNB and the SGW;

a processor, configured to control the transceiver and the t-eNB to transfer a context of the UE when the MME initiates a first procedure to cause the UE to enter the target state according to the first request message and a serving base station of the UE changes;

wherein,

the processor is further configured to detect that the UE in an eps connection management, ECM, connected state has no data transmission for a second time period, and detect that the UE is performing a V2X service;

wherein,

the processor further configured to suspend an S1-AP connection with the MME, the first request message further configured to request the MME to delete connection information of S1-AP connections with the eNB other than an MME UE S1 AP ID or suspend an S1-AP connection with the eNB; or deleting the connection information of the S1-AP connection with the MME, wherein the first request message is also used for requesting the MME to delete the connection information of the S1-AP connection with the eNB; or reserving the S1-AP connection with the MME, wherein the first request message is also used for requesting the MME to reserve the S1-AP connection with the eNB.

57. The eNB of claim 56, wherein the transceiver is further configured to receive an indication message sent by the MME for the first request message, wherein the indication message is used to instruct the eNB to delete the related information of the SGW in the context of the UE and configure the UE to release the DRB with the eNB;

the processor is further configured to delete the relevant information of the SGW in the context of the UE according to the indication message, and configure the UE to release the DRB with the eNB.

58. The eNB of claim 57, wherein the indication message carries first information for informing the UE to enter the target state.

59. The eNB of claim 56 or 57 or 58 wherein said UE is in said target state and in ECM idle state in case said processor suspends S1-AP connection with said MME or deletes connection information of S1-AP connection with said MME;

the transceiver is further configured to receive a paging message sent by the MME, where the paging message includes a paging identifier of the UE and an indication that the UE is in the target state;

the processor is further configured to check whether the eNB stores the paging identifier of the UE according to the indication; under the condition that the paging identification of the UE is determined to be stored, establishing S1-AP connection with the MME; and discarding the paging message under the condition that the paging identification of the UE is not stored.

60. A UE, wherein the UE comprises:

a transceiving module, configured to send a first request message to an MME, where the first request message is used to request that the UE enter a target state, and in the target state, an RRC connection exists between the UE and an S-eNB, a DRB does not exist, and an S1-U bearer of the UE does not exist between the S-eNB and an SGW;

the specific way for the transceiver module to send the first request message to the MME is as follows:

under the condition that the UE is in an ECM idle state and has a V2X service transmission requirement, sending a first request message to an MME, wherein the first request message is an extended service request which comprises an identifier for indicating that S1-U bearing and DRB do not need to be established for the UE;

wherein the extended service request is used for triggering the MME to acquire V2X-related information of the UE from the context of the UE; transmitting a third request message to the s-eNB according to the extended service request, the third request message including V2X-related information of the UE, the third request message for requesting the s-eNB to establish a V2X-related context for the UE.

61. The UE of claim 60, further comprising a first processing module, wherein:

the first processing module is configured to detect that the UE has no data transmission for a first period of time when the UE is in an ECM-connected state;

the specific way for the transceiver module to send the first request message to the MME is as follows:

the first request message is sent to the MME via the s-eNB.

62. The UE of claim 61, further comprising a second processing module, wherein:

the transceiver module is further configured to receive a configuration message sent by the s-eNB and used for instructing to release the DRB;

the second processing module is configured to release the DRB with the s-eNB.

63. The UE of claim 61,

the transceiver module is further configured to receive first information sent by the s-eNB, where the first information is used to notify the UE to enter the target state.

64. The UE of claim 62,

the transceiver module is further configured to receive first information sent by the s-eNB, where the first information is used to notify the UE to enter the target state.

65. A UE, wherein the UE comprises:

a transceiver, configured to send a first request message to an MME, where the first request message is used to request that the UE enter a target state, and in the target state, an RRC connection exists between the UE and an S-eNB, a DRB does not exist, and an S1-U bearer of the UE does not exist between the S-eNB and an SGW;

the specific way for the transceiver to send the first request message to the MME is as follows:

under the condition that the UE is in an ECM idle state and has a V2X service transmission requirement, sending a first request message to an MME, wherein the first request message is an extended service request which comprises an identifier for indicating that S1-U bearing and DRB do not need to be established for the UE;

wherein the extended service request is used for triggering the MME to acquire V2X-related information of the UE from the context of the UE; transmitting a third request message to the s-eNB according to the extended service request, the third request message including V2X-related information of the UE, the third request message for requesting the s-eNB to establish a V2X-related context for the UE.

66. The UE of claim 65, further comprising a first processor, wherein:

the first processor is configured to detect that the UE has no data transmission for a first period of time while the UE is in an ECM-connected state;

the specific way for the transceiver to send the first request message to the MME is as follows:

the first request message is sent to the MME via the s-eNB.

67. The UE of claim 65, further comprising a second processor, wherein:

the transceiver is further configured to receive a configuration message sent by the s-eNB for instructing release of DRBs;

the second processor is configured to release the DRB with the s-eNB.

68. The UE of claim 66,

the transceiver is further configured to receive first information sent by the s-eNB, where the first information is used to notify the UE to enter the target state.

69. The UE of claim 67,

the transceiver is further configured to receive first information sent by the s-eNB, where the first information is used to notify the UE to enter the target state.

70. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by hardware, is capable of implementing the method of any one of claims 1 to 9.

71. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by hardware, is capable of implementing the method of any one of claims 10 to 18.

72. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by hardware, is able to implement the method of any one of claims 19 to 23.

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