CN108684078B - A kind of method and device updating user plane gateway - Google Patents

Abstract

The present invention provides a kind of method and device for updating user plane gateway, to solve in the prior art in the case where MME and GW-C do not change, cannot achieve the technical issues of GW-U updates.The embodiment of the invention provides four kinds of different solutions, it is realized during UE carries out TAU from the angle of the existing realization mechanism of compatibility and raising system effectiveness respectively, the EPS system of distributed network gate can be current according to UE position, it selects optimal GW-U and re-establishes PDN connection, the optimization for realizing data transfer path, ensure that communication performance.

Description

A kind of method and device updating user plane gateway

Technical field

The present invention relates to field of communication technology more particularly to a kind of method and devices for updating user plane gateway.

Background technique

System Architecture Evolution (System Architecture Evolution, SAE) is that 3GPP wirelessly communicates LTE The upgrading plan of the core network architecture of standard, SAE framework are as shown in Figure 1.For SAE framework, if across the TA movement of UE, UE Tracing section updating (Tracking Area Update, TAU) will be triggered, in the case where MME and S-GW do not change, TAU process execute during, there is no any Signalling exchange between MME and S-GW, wherein TA (Tracking Area) be by The geographic area of the cell composition of continuous sheet of covering, is managed for the position to the UE being in idle condition.

In SAE framework, gateway, which still needs, remains with a large amount of external signaling interface, and gateway is largely externally believed Enable interface that can bring a large amount of interface signaling, it is not strong using the gateway signaling process performance of specialized hardware platform, easily become bottle Neck.Software defined network (Software Defined Network, SDN) provides to solve the bottleneck problem of gateway signaling processing Effective approach, the SAE framework based on SDN are as shown in Figure 2.

With the fast development of mobile Internet and popularizing for intelligent terminal, mobile flow presents explosive growth Trend gives core net bring pressure to avoid mobile flow from increasing, mobile gateway show gradually move down, distributed deployment Trend.GW- is realized by the way that GW-U is further moved down simultaneously distributed deployment for the SAE framework shown in Fig. 2 based on SDN The framework of U distributed deployment is as shown in Figure 3.

However in distributed network gate framework, during TAU process executes, it is possible to need to select newly for UE GW-U simultaneously establishes new PDN (Chinese: packet data network；English: Packet Data Network) connection.But due to MME The deployment scenario of GW-U can not be known, so cannot achieve GW-U update in the case where MME and GW-C do not change.

Summary of the invention

The embodiment of the present invention provides a kind of method and device for updating user plane gateway, exists in the prior art to solve In the case that MME and GW-C does not change, the technical issues of GW-U updates cannot achieve.

First aspect of the embodiment of the present invention provides a kind of method for updating user plane gateway, comprising:

Control plane gateway GW-C is sent to mobile management entity MME for indicating that the first packet data network PDN connection is built The vertical first message completed, the first PDN are connected as the company of the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, notifying parameters is carried in the first message, the notifying parameters are for requiring the MME in the tracking area where the UE The GW-C is notified when TA changes；

The GW-C receives the notification message that the MME is sent, and the notification message is for notifying UE described in the GW-C The tracking area TA at place changes；

The GW-C is according to the notification message, and TA corresponding 2nd GW-U after determining the variation where the UE is described 2nd GW-U is different from the first GW-U；

The GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is described for requesting MME triggers the UE and initiates the 2nd PDN connection, and the 2nd PDN is connected as the company of the PDN between the UE and the 2nd GW-U It connects；

The GW-C completes the 2nd PND establishment of connection using the 2nd GW-U.

With reference to first aspect, in the first possible implementation of the first aspect, the GW-C is initiated to the MME Rebuild the request message of PDN connection, comprising:

The GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is used to indicate described MME deletes the first PDN connection, and carrying is used to indicate the UE and establishes the 2nd PDN connection in the request message Parameter.

Second aspect of the embodiment of the present invention provides a kind of method for updating user plane gateway, comprising:

Control plane gateway GW-C is sent to mobile management entity MME for indicating that the first packet data network PDN connection is built The vertical first message completed, the first PDN are connected as the company of the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, the corresponding TA identification list of the first GW-U is carried in the first message；

The GW-C receives the notification message that the MME is sent according to the first message, and the notification message is for leading to Know that the TA of the tracking area TA where UE described in the GW-C is identified not in the TA identification list；

The GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is described for requesting MME triggers the UE and initiates the 2nd PDN connection, and the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U；

The GW-C completes the 2nd PND establishment of connection using the 2nd GW-U.

In conjunction with second aspect, in the first possible implementation of the second aspect, the GW-C is initiated to the MME Rebuild the request message of PDN connection, comprising:

The GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is used to indicate described MME deletes the first PDN connection, and carrying is used to indicate the UE and establishes the 2nd PDN connection in the request message Parameter.

The third aspect of the embodiment of the present invention provides a kind of method for updating user plane gateway, comprising:

Mobile management entity MME receives the first packet data network PDN of expression that is used for that control plane gateway GW-C is sent and connects The first message established and completed is connect, the first PDN is connected as the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, carries the corresponding TA identification list of the first GW-U in the first message；

The MME determines that the TA of the tracking area TA where the UE is identified not in the TA identification list；

The MME initiates to rebuild the request message of PDN connection to the UE, and the request message is for triggering the UE hair The 2nd PDN connection is played, the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

In conjunction with the third aspect, in the first possible implementation of the third aspect, the MME initiates weight to the UE Build the request message of PDN connection, comprising:

The MME initiates to disconnect the request message of the first PDN connection, carries in the request message and is used to indicate institute State the parameter that UE establishes the 2nd PDN connection.

Fourth aspect of the embodiment of the present invention provides a kind of method for updating user plane gateway, comprising:

Mobile management entity MME is after the tracking area TA where user equipment (UE) changes, where determining the UE The corresponding first TA mark of TA before changing, and determine the corresponding 2nd TA mark of TA after the variation where the UE, the UE and the Establishing between one GW-U has the first PDN connection；

The corresponding relationship of MME each the GW-U mark and tracking area TA identification list according to the pre-stored data, determines institute The corresponding first GW-U mark of TA list where stating the first TA mark, and determine the TA list pair where the 2nd TA mark The 2nd GW-U is answered to identify；

As corresponding first GW-U of the first GW-U mark twoth GW-U corresponding with the 2nd GW-U mark When different, the MME initiates to rebuild the request message of PDN connection to the UE, and the request message is for triggering the UE hair The 2nd PDN connection is played, the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

In conjunction with fourth aspect, in the first possible implementation of the fourth aspect, the MME initiates weight to the UE Build the request message of PDN connection, comprising:

The MME initiates to disconnect the request message of the first PDN connection to the UE, carries and uses in the request message The parameter of the 2nd PDN connection is established in the instruction UE.

The 5th aspect of the embodiment of the present invention provides a kind of device for updating user plane gateway, comprising:

Transmission unit, for sending to mobile management entity MME for indicating that the first packet data network PDN connection is established The first message of completion, the first PDN are connected as the PDN connection between user equipment (UE) and the first user plane gateway GW-U, Notifying parameters are carried in the first message, the notifying parameters are for requiring the MME in the tracking area TA where the UE The GW-C is notified when changing；

Receiving unit, the notification message sent for receiving the MME, the notification message is for notifying the GW-C institute Tracking area TA where stating UE changes；

Determination unit, for according to the notification message, determining corresponding 2nd GW-U of TA after the variation where the UE, 2nd GW-U is different from the first GW-U；

Request unit, for initiating the request message of reconstruction PDN connection to the MME, the request message is for requesting The MME triggers the UE and initiates the 2nd PDN connection, and the 2nd PDN is connected as between the UE and the 2nd GW-U PDN connection；

Unit is established, for completing the 2nd PND establishment of connection using the 2nd GW-U.

In conjunction with the 5th aspect, in the first possible implementation of the 5th aspect, the request unit is used for:

The request message of reconstruction PDN connection is initiated to the MME, the request message is used to indicate the MME and deletes institute The first PDN connection is stated, is carried in the request message and is used to indicate the parameter that the UE establishes the 2nd PDN connection.

The 6th aspect of the embodiment of the present invention provides a kind of device for updating user plane gateway, comprising:

Transmission unit, for sending to mobile management entity MME for indicating that the first packet data network PDN connection is established The first message of completion, the first PDN are connected as the PDN connection between user equipment (UE) and the first user plane gateway GW-U, The corresponding TA identification list of the first GW-U is carried in the first message；

Receiving unit, the notification message sent for receiving the MME according to the first message, the notification message are used In notify the tracking area TA where UE described in the GW-C TA identify not in the TA identification list；

Request unit, for initiating the request message of reconstruction PDN connection to the MME, the request message is for requesting The MME triggers the UE and initiates the 2nd PDN connection, and the 2nd PDN is connected as the company of the PDN between the UE and the 2nd GW-U It connects；

Unit is established, for completing the 2nd PND establishment of connection using the 2nd GW-U.

In conjunction with the 6th aspect, in the first possible implementation of the 6th aspect, the request unit is used for:

The request message of reconstruction PDN connection is initiated to the MME, the request message is used to indicate the MME and deletes institute The first PDN connection is stated, is carried in the request message and is used to indicate the parameter that the UE establishes the 2nd PDN connection.

The 7th aspect of the embodiment of the present invention provides a kind of device for updating user plane gateway, comprising:

Receiving unit, for receive control plane gateway GW-C transmission for indicate the first packet data network PDN connection The first message completed is established, the first PDN is connected as the company of the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, the corresponding TA identification list of the first GW-U is carried in the first message；

Determination unit, for determining that the TA of the tracking area TA where the UE is identified not in the TA identification list；

Request unit, for initiating the request message of reconstruction PDN connection to the UE, the request message is for triggering institute It states UE and initiates the 2nd PDN connection, the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

In conjunction with the 7th aspect, in the first possible implementation of the 7th aspect, the request unit is used for:

The request message of disconnection the first PDN connection is initiated, carrying is used to indicate the UE and builds in the request message Found the parameter of the 2nd PDN connection.

Eighth aspect of the embodiment of the present invention provides a kind of device for updating user plane gateway, comprising:

Storage unit, for the corresponding relationship of each GW-U mark and tracking area TA identification list to be stored in advance；

Determination unit, for determining the change where the UE after the tracking area TA where user equipment (UE) changes Corresponding first TA of TA is identified before changing, and the corresponding 2nd TA mark of TA after the variation where the determining UE, the UE and first Establishing between GW-U has the first PDN connection；According to the corresponding relationship, the TA list where determining the first TA mark is corresponding First GW-U mark, and determine the corresponding 2nd GW-U mark of the TA list at the 2nd TA mark place；

Request unit, for identifying corresponding first GW-U and the 2nd GW-U mark pair as the first GW-U When the 2nd GW-U difference answered, Xiang Suoshu UE initiates to rebuild the request message of PDN connection, and the request message is described for triggering UE initiates the 2nd PDN connection, and the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

In conjunction with eighth aspect, in the first possible implementation of eighth aspect, the request unit is used for:

The request message for disconnecting the first PDN connection is initiated to the UE, carries and is used to indicate in the request message The UE establishes the parameter of the 2nd PDN connection.

The one or more technical solutions provided in the embodiment of the present invention, have at least the following technical effects or advantages:

In the embodiment of the present invention, for distributed network gate framework, during UE carries out TAU, GW-C first or MME are true The corresponding GW-U of TA after fixed variation is different from the GW-U in established PDN connection, and then UE triggers PDN connection reconstruction, GW- C selects new GW-U to complete PDN connection reconstruction.The optimization for realizing data transfer path, ensure that communication performance.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings His attached drawing.

Fig. 1 is the schematic diagram of SAE framework in the prior art；

Fig. 2 is the schematic diagram of the SAE framework based on SDN in the prior art；

Fig. 3 is the schematic diagram of distributed network gate framework in the prior art；

Fig. 4 is the flow chart of the method for the first update distributed network gate provided in an embodiment of the present invention；

Fig. 5 is the Signalling exchange schematic diagram of the first update distributed network gate provided in an embodiment of the present invention；

Fig. 6 is the flow chart of the method for second provided in an embodiment of the present invention update distributed network gate；

Fig. 7 is the Signalling exchange schematic diagram of second provided in an embodiment of the present invention update distributed network gate；

Fig. 8 is that provided in an embodiment of the present invention the third updates the flow chart of the method for distributed network gate；

Fig. 9 is that provided in an embodiment of the present invention the third updates the Signalling exchange schematic diagram of distributed network gate；

Figure 10 is the flow chart of the method for 4th kind provided in an embodiment of the present invention update distributed network gate；

Figure 11 is the Signalling exchange schematic diagram of 4th kind provided in an embodiment of the present invention update distributed network gate；

Figure 12 is a kind of the first module diagram of device for updating user plane gateway provided in an embodiment of the present invention；

Figure 13 is a kind of the first structural schematic diagram of control plane gateway provided in an embodiment of the present invention；

Figure 14 is a kind of second of module diagram of device for updating user plane gateway provided in an embodiment of the present invention；

Figure 15 is a kind of second of structural schematic diagram of control plane gateway provided in an embodiment of the present invention；

Figure 16 is a kind of the third module diagram of device for updating user plane gateway provided in an embodiment of the present invention；

Figure 17 is a kind of the first structural schematic diagram of mobile management entity provided in an embodiment of the present invention；

Figure 18 is a kind of the 4th kind of module diagram of device for updating user plane gateway provided in an embodiment of the present invention；

Figure 19 is a kind of second of structural schematic diagram of mobile management entity provided in an embodiment of the present invention.

Specific embodiment

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art All other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.

The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes System, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, herein Middle character "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or".

Referring to FIG. 3, distributed network gate framework shown in Fig. 3 is suitable for user plane gateway provided in an embodiment of the present invention Update method.The main network elements in Fig. 3 are described briefly below.

UE (Chinese: user equipment；English: User Equipment), also referred to as mobile terminal (Mobile Terminal), mobile subscriber equipment etc., can be through wireless access network (RAN, Radio Access Network) and one or more A core net (CN, Core Network) is communicated, and user equipment can be such as mobile phone or with the meter of mobile terminal Calculation machine, for example, portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device.Such as: mobile phone, intelligence Terminal, multimedia equipment, stream media equipment etc..

ENodeB (Chinese: evolved Node B；English: Evolved Node B): the wireless base station in LTE network. ENodeB is unique network element of LTE wireless access network, and it is functional to be responsible for the relevant institute of air interface.It may also is that GSM or CDMA In base station (BTS, Base Transceiver Station), be also possible to base station (NodeB) in WCDMA and subsequent The network equipment of similar functions is realized in evolution system, the present invention does not limit.It should be noted that being disposed according to real network It needs, the form of the network equipment is changed accordingly, such as use distributed base station mode, also in protection model of the invention Within enclosing.

MME (Chinese: mobile management entity；English: Mobility Management Entity), it is in LTE core network It is responsible for the network element of processing signaling.MME is responsible for the mobile management of control plane, including user's context and moving condition management.

GW-C (Chinese: control plane gateway；English: Gateway Control-plane), GW-C is to concentrate deployment, GW- C is responsible for handling external Signalling exchange, including the GTP-C signaling between MME and the signaling between other network elements.

GW-U (Chinese: user plane gateway；English: Gateway User-plane), GW-U is distributed deployment, GW-U Contextual information for being indicated according to GW-C realizes the forwarding of user data message.

The embodiment of the present invention proposes two kinds of mechanism mainly to realize that GW-U updates, both mechanism difference is as follows:

The first mechanism are as follows: during TAU process executes, MME notifies GW-C using predetermined mechanisms, is initiated by GW-C The process that PDN is discharged and re-established, to complete GW-U update.

Second of mechanism are as follows: MME obtains the mapping relations of GW-U and TA in advance, during TAU process executes, by The process that MME actively initiates PDN release and re-establishes, to complete GW-U update.

Embodiment one

How to realize that GW-U update is described in detail under the first mechanism of embodiment a pair.As shown in figure 4, at the first Under mechanism, realize GW-U update first method the following steps are included:

Step 401: control plane gateway GW-C is sent to mobile management entity MME for indicating that the first PDN connection has been established At first message, the first packet data network PDN is connected as between user equipment (UE) and the first user plane gateway GW-U PDN connection, notifying parameters are carried in the first message, the notifying parameters are for requiring the MME where the UE Tracking area TA notify the GW-C when changing.

Step 402: the GW-C receives the notification message that the MME is sent, and the notification message is for notifying the GW- Tracking area TA where UE described in C changes.

Step 403: TA corresponding second of the GW-C according to the notification message, after determining the variation where the UE GW-U, the 2nd GW-U are different from the first GW-U.

Step 404: the GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is for asking It asks the MME to trigger the UE and initiates the 2nd PDN connection, the 2nd PDN is connected as between the UE and the 2nd GW-U PDN connection.

Step 405: the GW-C completes the 2nd PND establishment of connection using the 2nd GW-U.

Wherein, the GW-C initiates to rebuild the request message of PDN connection to the MME, comprising:

The GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is used to indicate described MME deletes the first PDN connection, and carrying is used to indicate the UE and establishes the 2nd PDN connection in the request message Parameter.

Specifically, during UE adheres to network or in the first PDN connection established between UE and the first GW-U During, GW-C is sent to MME changes notice behavior (English: Change Reporting Action) parameter, it is desirable that MME GW-C is notified when the TA where UE changes.If UE triggers TAU process and executes, MME transmission change notice (English: Change Notification) message is to GW-C, and the TA where notifying GW-C UE changes, and GW-C is according to the change where UE TA after change judges whether to need to update GW-U, and in case of need, triggering completes GW-U and updates and establish newly PDN connection.

Wherein, PDN connection is established between UE and the first GW-U, is needed to carry out between each network element in Fig. 5 shown in A1 to A4 Signalling exchange:

A1) UE sends PDN connection to MME and establishes request (English: PDN Connectivity Request) message, request Establish the first PDN connection；

A2) MME sends creation session request (English: Create Session Request) Messages Message to GW-C, asks Ask creation session；

A3) GW-C selects the first GW-U, and in the creation session response (English: Create Session for returning to MME Response) setting changes notice behavioral parameters in message, it is desirable that MME notifies GW-C in the TA variation where UE；

A4) each network element completes other steps that the first PDN connection is established.

If UE triggers TAU process and executes, that is to say, that the TA where UE changes, then the mistake executed in TAU process Cheng Zhong, need to carry out 1 to 10 in Fig. 5 between each network element shown in Signalling exchange:

1) UE triggers TAU starting；

2) UE sends TAU request message to eNodeB, initiates TAU；

3) TAU request message is transmitted to MME by eNodeB；

4) MME, which is sent, changes notification message to GW-C, and the information to change of the TA where UE is notified to GW-C；

5) it after GW-C receives change notification message, returns and changes Notification Validation (English: Change Notification Ack) message is to MME；

6) MME sends TAU and accepts message to UE；

7) UE sends TAU and completes message to MME；

8) GW-C is according to the corresponding relationship of the GW-U of TA and distributed deployment after the variation where UE, it is determined whether needs Update GW-U；If desired it updates, then sends deleting bearing request (English: Delete Bearer Request) message to MME, Indicate the default bearing of the first PDN connection of deletion, and setting Cause is " Reactivation Requested " in the message；

9) each network element completes the deactivation process of the default bearing of the first PDN connection；

10) according to the instruction of " Reactivation Requested " parameter, UE initiates new PDN connection request, GW-C The 2nd GW-U is selected, the PDN connection establishment process between the 2nd GW-U is completed.

In above process, if you do not need to executing GW-U more new technological process, then step 8) -10) it is not carried out.

In example 1, in such a way that Change Reporting Action is set, so that UE is when carrying out TAU, MME proactive notification GW-C, GW-C judge whether to need to update GW-U according to the TA after the variation where UE, and are needing to update In the case where, triggering is completed GW-U and is updated and PDN connection reconstruction.

On the one hand, embodiment one solves the problems, such as that existing TAU process cannot achieve GW-U update, and GW-C can be according to UE Current position selects optimal GW-U and establishes PDN connection, realizes the optimization of data transfer path, ensure that communicativeness Energy；On the other hand, realize MME notice GW-C's using existing Location Change Reporting process in embodiment one Function does not change MME, to reduce realization cost.

Embodiment two

Embodiment two to how to be realized under the first mechanism GW-U update be described in detail.As shown in fig. 6, at the first Under mechanism, realize GW-U update second method the following steps are included:

Step 601: control plane gateway GW-C is sent to mobile management entity MME for indicating the first packet data network The first message completed is established in PDN connection, and the first PDN is connected as between user equipment (UE) and the first user plane gateway GW-U PDN connection, carry the corresponding TA identification list of the first GW-U in the first message.

Step 602: the GW-C receives the notification message that the MME is sent according to the first message, and the notice disappears TA of the breath for the tracking area TA where notifying UE described in the GW-C is identified not in the TA identification list.

Step 603: the GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is for asking It asks the MME to trigger the UE and initiates the 2nd PDN connection, the 2nd PDN is connected as the PDN between the UE and the 2nd GW-U Connection.

Step 604: the GW-C completes the 2nd PND establishment of connection using the 2nd GW-U.

Wherein, the GW-C initiates to rebuild the request message of PDN connection to the MME, comprising:

The GW-C initiates to rebuild the request message of PDN connection to the MME, and the request message is used to indicate described MME deletes the first PDN connection, and carrying is used to indicate the UE and establishes the 2nd PDN connection in the request message Parameter.

Specifically, during UE adheres to network or in the first PDN connection established between UE and the first GW-U During, GW-C sends the corresponding TA list of the first GW-U to MME.If UE triggers TAU process and executes, MME judges UE Whether the TA after the variation at place is in the corresponding TA list of the first GW-U, if it was not then sending Change Notification message to GW-C, complete GW-U and update and establish new PDN connection by GW-C triggering.

Compared with embodiment one, embodiment two considers that not each TAU can cause GW-U to update, because there may be The case where TA before TAU updates corresponds to the first GW-U, and updated TA also corresponds to a GW-U, therefore the proposition of embodiment two only has When UE has left the corresponding TA list of the first GW-U (i.e. the TAU of UE triggering can cause GW-U to update), MME is just notified that GW-C, It is not when being executed such as UE each in embodiment one triggering TAU process, MME will send Change to GW-C Notification message, therefore embodiment two reduces signaling burden compared to embodiment one to a certain extent.

Wherein, PDN connection is established between UE and the first GW-U, is needed to carry out between each network element in Fig. 7 shown in A1 to A4 Signalling exchange:

A1) UE sends PDN connection to MME and establishes request message, and the first PDN connection is established in request；

A2) MME sends creation conversation request message, request creation session to GW-C；

A3) GW-C selects the first GW-U, and is arranged in the Create Session Response message for returning to MME The corresponding TA list of first GW-U, MME are saved for each UE；

A4) each network element completes other steps that the first PDN connection is established.

If UE triggers TAU process and executes, that is to say, that the TA where UE changes, then the mistake executed in TAU process Cheng Zhong, need to carry out 1 to 10 in Fig. 7 between each network element shown in Signalling exchange:

1) UE triggers TAU starting；

2) UE sends TAU Request message to eNodeB, initiates TAU；

3) TAU Request message is transmitted to MME by eNodeB；

4) MME judges the TA after the variation where UE whether in the corresponding TA list of the first GW-U, if it was not then hair Send Change Notification message to GW-C；

5) it after GW-C receives Change Notification message, returns to Change Notification Ack message and gives MME；

6) MME sends TAU Accept message to UE；

7) UE sends TAU Complete message to MME；

8) after if GW-C receives Change Notification message, send Delete Bearer Request message To MME, the default bearing of the first PDN connection is deleted in instruction, and setting Cause is " Reactivation in the message Requested"；

9) each network element completes the deactivation process of the default bearing of the first PDN connection；

10) according to the instruction of " Reactivation Requested " parameter, UE initiates new PDN connection request, GW-C The 2nd GW-U is selected, the PDN connection establishment process between the 2nd GW-U is completed.

In above process, if you do not need to executing GW-U more new technological process, then step 4) -5), 8) -10) it is not carried out.

In example 2, in such a way that the corresponding TA list of the first GW-U is set, so that UE is when carrying out TAU, When having UE to have left the corresponding TA list of the first GW-U, MME is just notified that GW-C, and GW-C triggering completes that GW-U updates and PDN connects Connect reconstruction.

On the one hand, embodiment two reduces unnecessary Change Notification message compared to embodiment one, drop Low signaling burden；On the other hand, in embodiment two utilize existing Presence Reporting Area process, realize UE from MME notifies the function of GW-C when opening specific TA list, does not change to MME equally, to reduce realization cost.

Embodiment three

Embodiment three to how to be realized under second of mechanism GW-U update be described in detail.As shown in figure 8, at second Under mechanism, realize GW-U update first method the following steps are included:

Step 801: what mobile management entity MME reception control plane gateway GW-C was sent is used to indicate the first Packet Data Network The first message completed is established in network PDN connection, the first PDN be connected as user equipment (UE) and the first user plane gateway GW-U it Between PDN connection, carry the corresponding TA identification list of the first GW-U in the first message.

Step 802: the MME determines that the TA of the tracking area TA where the UE is identified not in the TA identification list.

Step 803: the MME initiates to rebuild the request message of PDN connection to the UE, and the request message is for triggering The UE initiates the 2nd PDN connection, and the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

Wherein, the MME initiates to rebuild the request message of PDN connection to the UE, comprising:

The MME initiates to disconnect the request message of the first PDN connection, carries in the request message and is used to indicate institute State the parameter that UE establishes the 2nd PDN connection.

Specifically, during UE adheres to network or in the first PDN connection established between UE and the first GW-U During, GW-C sends the corresponding TA list of the first GW-U to MME.If UE triggers TAU process and executes, MME judges UE TA after the variation at place whether in the corresponding TA list of the first GW-U, if it was not then MME triggering complete GW-U update with And establish new PDN connection.

Compared with embodiment two, embodiment three has left the corresponding TA list of the first GW-U (the i.e. TAU meeting of UE triggering in UE GW-U is caused to update) when, MME is actively initiated no longer as notified GW-C in embodiment two and is completed GW-U update and PDN company Connect reconstruction.

Wherein, PDN connection is established between UE and the first GW-U, is needed to carry out between each network element in Fig. 9 shown in A1 to A4 Signalling exchange:

A1) UE sends PDN connection to MME and establishes request message, and the first PDN connection is established in request；

A2) MME sends creation conversation request message, request creation session to GW-C；

A3) GW-C selects the first GW-U, and is arranged in the Create Session Response message for returning to MME The corresponding TA list of first GW-U, MME are saved for each UE；

A4) each network element completes other steps that the first PDN connection is established.

If UE triggers TAU process and executes, that is to say, that the TA where UE changes, then the mistake executed in TAU process Cheng Zhong, need to carry out 1 to 7 in Fig. 9 between each network element shown in Signalling exchange:

1) UE triggers TAU starting；

2) UE sends TAU Request message to eNodeB, initiates TAU；

3) TAU Request message is transmitted to MME by eNodeB；

4) MME sends TAU Accept message to UE；

5) UE sends TAU Complete message to MME；

6) MME judge the TA after the variation where UE whether in the corresponding TA list of the first GW-U, if it was not then MME initiates PDN disconnection process, and setting Cause is " Reactivation Requested " in the message；

7) according to the instruction of " Reactivation Requested " parameter, UE initiates new PDN connection request, GW-C choosing The 2nd GW-U is selected, the PDN connection establishment process between the 2nd GW-U is completed.

In above process, if you do not need to executing GW-U more new technological process, then step 6) -7) it is not carried out.

In the third embodiment, in such a way that the corresponding TA list of the first GW-U is set, so that UE is when carrying out TAU, When having UE to have left the corresponding TA list of the first GW-U, MME actively initiates and completes GW-U to update and PDN connection reconstruction.

Embodiment three needs to carry out MME certain Function Extension, to judge update that TAU no can cause GW-U, concurrently Playing and complete GW-U update and PDN connection reconstruction, embodiment three reduces the Signalling exchange of MME and GW-U compared to embodiment two (the Change Notification and Change Notification Ack message in embodiment two), further reduced letter Enable burden.

Example IV

Example IV to how to be realized under second of mechanism GW-U update be described in detail.As shown in Figure 10, second Under kind of mechanism, realize the second method that GW-U updates the following steps are included:

Step 101: mobile management entity MME is after the tracking area TA where user equipment (UE) changes, described in determination Corresponding first TA of TA is identified before variation where UE, and the corresponding 2nd TA mark of TA after the variation where the determining UE, institute It states to establish between UE and the first GW-U and has the first PDN connection.

Step 102: MME each GW-U mark according to the pre-stored data is corresponding with tracking area TA identification list to close System determines the corresponding first GW-U mark of the TA list at the first TA mark place, and determines the 2nd TA mark place The corresponding 2nd GW-U mark of TA list.

Step 103: when corresponding first GW-U of the first GW-U mark is corresponding with the 2nd GW-U mark When the 2nd GW-U difference, the MME initiates to rebuild the request message of PDN connection to the UE, and the request message is for triggering The UE initiates the 2nd PDN connection, and the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

Wherein, the MME initiates to rebuild the request message of PDN connection to the UE, comprising:

The MME initiates to disconnect the request message of the first PDN connection to the UE, carries and uses in the request message The parameter of the 2nd PDN connection is established in the instruction UE.

Specifically, the corresponding TA list of each GW-U is sent to MME by the signaling of device level.If UE triggers TAU Process executes, then MME judges whether the corresponding GW-U of TA after the variation where UE is corresponding with the TA before the variation where UE GW-U is identical, if it is different, then GW-U is completed in MME triggering updates and establish new PDN connection.

If UE triggers TAU process and executes, that is to say, that the TA where UE changes, then the mistake executed in TAU process Cheng Zhong, need to carry out 0 to 7 in Figure 11 between each network element shown in Signalling exchange:

0) mapping table { [GW-U ID, TA list] ... } of GW-U and TA is sent to MME by GW-C, or in advance by GW-U With the mapping table of TA { [GW-U ID, TA list] ... } configuration in MME；Hereafter when UE adheres to or establishes the first PDN connection, It is the first GW-U that MME can calculate corresponding GW-U ID according to the TA where UE；

1) UE triggers TAU starting；

2) UE sends TAU Request message to eNodeB, initiates TAU；

3) TAU Request message is transmitted to MME by eNodeB；

4) MME sends TAU Accept message to UE；

5) UE sends TAU Complete message to MME；

6) MME inquires the mapping table of GW-U and TA, the TA after judging the variation where UE corresponding 2nd GW-U, the 2nd GW-U It is whether identical as the first GW-U, if it is different, then MME, which initiates PDN, disconnects (English: PDN disconnection) process, And setting Cause is " Reactivation Requested " in the message；

7) according to the instruction of " Reactivation Requested " parameter, UE initiates new PDN connection request, GW-C choosing Select new GW-U, the PDN connection establishment process between completion and the GW-U newly selected.

In above process, if you do not need to executing GW-U more new technological process, then step 6) -7) it is not carried out.

In example IV, it is contemplated that the state for being likely to occur GW-U, which changes, (to be increased newly, deletes, position change, corresponding to TA list changes etc.) the case where, so after executing the step 0), need to carry out between each network element 8 to 9 in Figure 11 shown in Signalling exchange:

8) when the state for having GW-U changes (newly-increased, deletion, position change, corresponding TA list change etc.), state Changed GW-U notifies GW-C；

9) mapping table of updated GW-U and TA is sent to MME according to the state change situation of GW-U by GW-C.

In above process, step 8) can just be executed when the state of GW-U changes, and step 9) is then only in GW-U It can just be executed when changing with the mapping relations of TA list.

In example IV, GW-C utilizes the mapping table of device level signaling transmission GW-U and TA to MME, so that UE is being carried out When TAU, MME can inquire mapping table, to determine the need for carrying out GW-U update, when determination needs to update GW-U, and MME master It is dynamic to initiate and complete GW-U update and PDN connection reconstruction.In addition, GW-C passes through device level when the state of GW-U changes Information updating GW-U and TA mapping table.

Example IV needs to carry out MME certain Function Extension, with the mapping table to receive and handle GW-U and TA, and Judge the update that TAU no can cause GW-U, and initiates and complete GW-U and update and PDN connection reconstruction.With embodiment one to implementation Example three is compared, on the one hand, example IV further reduced system letter using the mapping table of device level signaling transmission GW-U and TA Enable burden；On the other hand, when the state of GW-U changes, new mapping relations can be sent to MME in time, ensure that MME judges whether the correctness for needing GW-U to update.

Compared with embodiment one and embodiment two, MME actively initiates PDN and re-establishes stream in embodiment three and example IV Journey is that UE is promoted to initiate PDN connection reconstruction, and embodiment one and embodiment by PDN disconnection process in fact In two, GW-C initiates PDN and rebuilds process, is to deactivate process by the default bearing of the first PDN connection in fact, UE is promoted to initiate PDN connection reconstruction.

Compared with embodiment two and embodiment three, the mapping table of GW-U and TA is sent to MME by GW-C in example IV, or Person in advance configures the mapping table of GW-U and TA in MME, as soon as so UE and GW-U are established during PDN connect, no The corresponding TA list of the first GW-U is transmitted again.

To sum up, for it is of the existing technology TAU process execute during do not support GW-U to update the technical issues of, The embodiment of the invention provides four kinds of different solutions, respectively from the angle of the existing realization mechanism of compatibility and raising system effectiveness Degree realizes, and during UE carries out TAU, the position that the EPS system of distributed network gate can be current according to UE, selection is most preferably GW-U and re-establish PDN connection, realize the optimization of data transfer path, ensure that communication performance.

Based on the same inventive concept, the embodiment of the present invention also provides a kind of device for updating user plane gateway.

Figure 12 is please referred to, Figure 12 is a kind of the first mould of device for updating user plane gateway provided in an embodiment of the present invention Block schematic diagram.The meaning and specific implementation for the term that the device of update user plane gateway is related to shown in Figure 12, Ke Yican The associated description of Fig. 1 to Figure 11 and embodiment is stated before examination.The device can be foregoing control plane gateway, the device packet Include: transmission unit 1201, determination unit 1203, request unit 1204, establishes unit 1205 at receiving unit 1202.

Transmission unit 1201, for sending to mobile management entity MME for indicating the first packet data network PDN connection The first message completed is established, the first PDN is connected as the company of the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, notifying parameters is carried in the first message, the notifying parameters are for requiring the MME in the tracking area where the UE The GW-C is notified when TA changes；

Receiving unit 1202, the notification message sent for receiving the MME, the notification message are described for notifying Tracking area TA where UE described in GW-C changes；

Determination unit 1203, for according to the notification message, determining the TA corresponding second after the variation where the UE GW-U, the 2nd GW-U are different from the first GW-U；

Request unit 1204, for initiating the request message of reconstruction PDN connection to the MME, the request message is used for Request the MME to trigger the UE and initiate the 2nd PDN connection, the 2nd PDN be connected as the UE and the 2nd GW-U it Between PDN connection；

Unit 1205 is established, for completing the 2nd PND establishment of connection using the 2nd GW-U.

Optionally, request unit 1204 is used for:

The request message of reconstruction PDN connection is initiated to the MME, the request message is used to indicate the MME and deletes institute The first PDN connection is stated, is carried in the request message and is used to indicate the parameter that the UE establishes the 2nd PDN connection.

Various change mode and specific example in the method for update user plane gateway in earlier figures 4 and Fig. 5 embodiment It is equally applicable to the device of the update user plane gateway of the present embodiment, by aforementioned to the detailed of the method for updating user plane gateway Description, those skilled in the art are clear that the implementation method that the device of user plane gateway is updated in the present embodiment, institute With succinct for specification, this will not be detailed here.

Figure 13 is please referred to, Figure 13 is a kind of the first structural schematic diagram of control plane gateway provided in an embodiment of the present invention. The meaning and specific implementation for the term that control plane gateway is related to shown in Figure 13, can with reference to earlier figures 1 to Figure 11 and The associated description of embodiment.The control plane gateway can be foregoing control plane gateway, which includes: to send Device 1301, receiver 1302, processor 1303, memory 1304.

Transmitter 1301: for sending to mobile management entity MME for indicating that the first packet data network PDN connection is built The vertical first message completed, the first PDN are connected as the company of the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, notifying parameters is carried in the first message, the notifying parameters are for requiring the MME in the tracking area where the UE The GW-C is notified when TA changes；

Receiver 1302, the notification message sent for receiving the MME, the notification message is for notifying the GW-C Tracking area TA where the UE changes；

Processor 1303, for according to the notification message, determining corresponding 2nd GW- of TA after the variation where the UE U, the 2nd GW-U are different from the first GW-U；It is described for initiating the request message of reconstruction PDN connection to the MME Request message initiates the 2nd PDN connection for requesting the MME to trigger the UE, and the 2nd PDN is connected as the UE and institute State the PDN connection between the 2nd GW-U；For completing the 2nd PND establishment of connection using the 2nd GW-U.

Optionally, processor 1303 is also used to: Xiang Suoshu MME initiates to rebuild the request message of PDN connection, and the request disappears Breath is used to indicate the MME and deletes the first PDN connection, carries and is used to indicate described in the UE foundation in the request message The parameter of 2nd PDN connection.

Wherein, in Figure 13, bus architecture (is represented) with bus 1300, and bus 1300 may include any number of mutual The bus and bridge of connection, bus 1300 will include that the one or more processors represented by processor 1303 and memory 1304 represent Memory various circuit connections together.Bus 1300 can also will such as peripheral equipment, voltage-stablizer and power management electricity Together, these are all it is known in the art for various other circuit connections on road or the like, therefore, no longer carries out herein to it It further describes.Bus interface 1305 provides interface between bus 1300 and receiver 1302 and transmitter 1301.Receiver 1302 and transmitter 1301 can be the same element, i.e. transceiver, provide for over a transmission medium with various other devices The unit of communication.

Processor 1303 is responsible for management bus 1300 and common processing, and memory 1304 can be used to store processing The used data when executing operation of device 1303.

Various change mode and specific example in the method for update user plane gateway in earlier figures 4 and Fig. 5 embodiment It is equally applicable to the control plane gateway of the present embodiment, passes through the aforementioned detailed description to the method for updating user plane gateway, ability Field technique personnel are clear that the implementation method of the control plane gateway in the present embodiment, so in order to illustrate the letter of book Clean, this will not be detailed here.

Figure 14 is please referred to, Figure 14 is a kind of second of mould of device for updating user plane gateway provided in an embodiment of the present invention Block schematic diagram.The meaning and specific implementation for the term that the device of update user plane gateway is related to shown in Figure 14, Ke Yican The associated description of Fig. 1 to Figure 11 and embodiment is stated before examination.The device can be foregoing control plane gateway, the device packet Include: transmission unit 1401, request unit 1403, establishes unit 1404 at receiving unit 1402.

Transmission unit 1401, for sending to mobile management entity MME for indicating the first packet data network PDN connection The first message completed is established, the first PDN is connected as the company of the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, the corresponding TA identification list of the first GW-U is carried in the first message；

Receiving unit 1402, the notification message sent for receiving the MME according to the first message, the notice disappear TA of the breath for the tracking area TA where notifying UE described in the GW-C is identified not in the TA identification list；

Request unit 1403, for initiating the request message of reconstruction PDN connection to the MME, the request message is used for It requests the MME to trigger the UE and initiates the 2nd PDN connection, the 2nd PDN is connected as between the UE and the 2nd GW-U PDN connection；

Unit 1404 is established, for completing the 2nd PND establishment of connection using the 2nd GW-U.

Optionally, request unit 1403 is used for:

The request message of reconstruction PDN connection is initiated to the MME, the request message is used to indicate the MME and deletes institute The first PDN connection is stated, is carried in the request message and is used to indicate the parameter that the UE establishes the 2nd PDN connection.

Various change mode and specific example in the method for update user plane gateway in earlier figures 6 and Fig. 7 embodiment It is equally applicable to the device of the update user plane gateway of the present embodiment, by aforementioned to the detailed of the method for updating user plane gateway Description, those skilled in the art are clear that the implementation method that the device of user plane gateway is updated in the present embodiment, institute With succinct for specification, this will not be detailed here.

Figure 15 is please referred to, Figure 15 is a kind of second of structural schematic diagram of control plane gateway provided in an embodiment of the present invention. The meaning and specific implementation for the term that control plane gateway shown in figure 15 is related to, can with reference to earlier figures 1 to Figure 11 and The associated description of embodiment.The control plane gateway can be foregoing control plane gateway, which includes: to send Device 1501, receiver 1502, processor 1503, memory 1504.

Transmitter 1501: for sending to mobile management entity MME for indicating that the first packet data network PDN connection is built The vertical first message completed, the first PDN are connected as the company of the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, the corresponding TA identification list of the first GW-U is carried in the first message；

Receiver 1502, the notification message sent for receiving the MME according to the first message, the notification message For notifying the TA of the tracking area TA where UE described in the GW-C to identify not in the TA identification list；

Processor 1503, for initiating the request message of reconstruction PDN connection to the MME, the request message is for asking It asks the MME to trigger the UE and initiates the 2nd PDN connection, the 2nd PDN is connected as the PDN between the UE and the 2nd GW-U Connection；For completing the 2nd PND establishment of connection using the 2nd GW-U.

Optionally, processor 1503 is also used to: Xiang Suoshu MME initiates to rebuild the request message of PDN connection, and the request disappears Breath is used to indicate the MME and deletes the first PDN connection, carries and is used to indicate described in the UE foundation in the request message The parameter of 2nd PDN connection.

Wherein, in Figure 15, bus architecture (is represented) with bus 1500, and bus 1500 may include any number of mutual The bus and bridge of connection, bus 1500 will include that the one or more processors represented by processor 1503 and memory 1504 represent Memory various circuit connections together.Bus 1500 can also will such as peripheral equipment, voltage-stablizer and power management electricity Together, these are all it is known in the art for various other circuit connections on road or the like, therefore, no longer carries out herein to it It further describes.Bus interface 1505 provides interface between bus 1500 and receiver 1502 and transmitter 1501.Receiver 1502 and transmitter 1501 can be the same element, i.e. transceiver, provide for over a transmission medium with various other devices The unit of communication.

Processor 1503 is responsible for management bus 1500 and common processing, and memory 1504 can be used to store processing The used data when executing operation of device 1503.

Various change mode and specific example in the method for update user plane gateway in earlier figures 6 and Fig. 7 embodiment It is equally applicable to the control plane gateway of the present embodiment, passes through the aforementioned detailed description to the method for updating user plane gateway, ability Field technique personnel are clear that the implementation method of control plane gateway in the present embodiment, so in order to illustrate the succinct of book, This will not be detailed here.

Figure 16 is please referred to, Figure 16 is a kind of the third mould of device for updating user plane gateway provided in an embodiment of the present invention Block schematic diagram.The meaning and specific implementation for the term that the device of update user plane gateway is related to shown in Figure 16, Ke Yican The associated description of Fig. 1 to Figure 11 and embodiment is stated before examination.The device can be foregoing mobile management entity, the device It include: receiving unit 1601, determination unit 1602, request unit 1603.

Receiving unit 1601, for receive control plane gateway GW-C transmission for indicate the first packet data network PDN The first message completed is established in connection, and the first PDN is connected as between user equipment (UE) and the first user plane gateway GW-U PDN connection carries the corresponding TA identification list of the first GW-U in the first message；

Determination unit 1602, for determining that the TA of the tracking area TA where the UE is identified not in the TA identification list In；

Request unit 1603 initiates the request message for rebuilding PDN connection for the UE, and the request message is for triggering The UE initiates the 2nd PDN connection, and the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

Optionally, request unit 1603 is used for:

The request message of disconnection the first PDN connection is initiated, carrying is used to indicate the UE and builds in the request message Found the parameter of the 2nd PDN connection.

Various change mode and specific example in the method for update user plane gateway in earlier figures 8 and Fig. 9 embodiment It is equally applicable to the device of the update user plane gateway of the present embodiment, by aforementioned to the detailed of the method for updating user plane gateway Description, those skilled in the art are clear that the implementation method that the device of user plane gateway is updated in the present embodiment, institute With succinct for specification, this will not be detailed here.

Figure 17 is please referred to, Figure 17 is a kind of the first structural representation of mobile management entity provided in an embodiment of the present invention Figure.The meaning and specific implementation for the term that mobile management entity shown in Figure 17 is related to, can be with reference to earlier figures 1 to Figure 11 And the associated description of embodiment.The mobile management entity can be foregoing mobile management entity, and the mobile management is real Body includes: receiver 1701, processor 1702, memory 1703.

Transmitter 1701: for receiving connecting for the first packet data network PDN of expression for control plane gateway GW-C transmission The first message established and completed is connect, the first PDN is connected as the PDN between user equipment (UE) and the first user plane gateway GW-U It connects, carries the corresponding TA identification list of the first GW-U in the first message；

Processor 1702, for determining that the TA of the tracking area TA where the UE is identified not in the TA identification list； The request message of reconstruction PDN connection is initiated for the UE, the request message initiates the 2nd PDN company for triggering the UE It connects, the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U

Optionally, processor 1702 is also used to: initiating to disconnect the request message of the first PDN connection, the request disappears It is carried in breath and is used to indicate the parameter that the UE establishes the 2nd PDN connection.

Wherein, in Figure 17, bus architecture (is represented) with bus 1700, and bus 1700 may include any number of mutual The bus and bridge of connection, bus 1700 will include that the one or more processors represented by processor 1702 and memory 1703 represent Memory various circuit connections together.Bus 1700 can also will such as peripheral equipment, voltage-stablizer and power management electricity Together, these are all it is known in the art for various other circuit connections on road or the like, therefore, no longer carries out herein to it It further describes.Bus interface 1704 provides interface in bus 1700 and between transmitter 1701.Transmitter 1701 can be Transceiver provides the unit for communicating over a transmission medium with various other devices.

Processor 1702 is responsible for management bus 1700 and common processing, and memory 1703 can be used to store processing The used data when executing operation of device 1702.

Various change mode and specific example in the method for update user plane gateway in earlier figures 8 and Fig. 9 embodiment It is equally applicable to the mobile management entity of the present embodiment, by the aforementioned detailed description to the method for updating user plane gateway, originally Field technical staff is clear that the implementation method of mobile management entity in the present embodiment, so in order to illustrate the letter of book Clean, this will not be detailed here.

Figure 18 is please referred to, Figure 18 is a kind of the 4th kind of mould of device for updating user plane gateway provided in an embodiment of the present invention Block schematic diagram.The meaning and specific implementation for the term that the device of update user plane gateway is related to shown in Figure 18, Ke Yican The associated description of Fig. 1 to Figure 11 and embodiment is stated before examination.The device can be foregoing mobile management entity, the device It include: storage unit 1801, determination unit 1802, request unit 1803.

Storage unit 1801, for the corresponding relationship of each GW-U mark and tracking area TA identification list to be stored in advance；

Determination unit 1802, for for determining the UE after the tracking area TA where user equipment (UE) changes Corresponding first TA of TA is identified before the variation at place, and the corresponding 2nd TA mark of TA after the variation where the determining UE, described Establishing between UE and the first GW-U has the first PDN connection；According to the corresponding relationship, the TA where the first TA mark is determined The corresponding first GW-U mark of list, and determine the corresponding 2nd GW-U mark of the TA list at the 2nd TA mark place；

Request unit 1803, for being marked when the first GW-U identifies corresponding first GW-U and the 2nd GW-U When knowing corresponding 2nd GW-U difference, Xiang Suoshu UE initiates to rebuild the request message of PDN connection, and the request message is for triggering The UE initiates the 2nd PDN connection, and the 2nd PDN is connected as the PDN connection between the UE and the 2nd GW-U.

Optionally, request unit 1803 is used for:

The request message for disconnecting the first PDN connection is initiated to the UE, carries and is used to indicate in the request message The UE establishes the parameter of the 2nd PDN connection.

Various change mode and specific reality in the method for update user plane gateway in earlier figures 10 and Figure 11 embodiment Example is equally applicable to the device of the update user plane gateway of the present embodiment, by aforementioned to the detailed of the method for updating user plane gateway Thin description, those skilled in the art are clear that the implementation method that the device of user plane gateway is updated in the present embodiment, So this will not be detailed here in order to illustrate the succinct of book.

Figure 19 is please referred to, Figure 19 is a kind of second of structural representation of mobile management entity provided in an embodiment of the present invention Figure.The meaning and specific implementation for the term that mobile management entity shown in Figure 19 is related to, can be with reference to earlier figures 1 to Figure 11 And the associated description of embodiment.The mobile management entity can be foregoing mobile management entity, and the mobile management is real Body includes: processor 1901, memory 1902.

Memory 1902: for the corresponding relationship of each GW-U mark and tracking area TA identification list to be stored in advance；

Processor 1901, for where after the tracking area TA where user equipment (UE) changes, determining the UE The corresponding first TA mark of TA before changing, and determine the corresponding 2nd TA mark of TA after the variation where the UE, the UE and the Establishing between one GW-U has the first PDN connection；According to the corresponding relationship, the TA list pair where the first TA mark is determined It answers the first GW-U to identify, and determines the corresponding 2nd GW-U mark of the TA list at the 2nd TA mark place；For when described When first GW-U identifies corresponding first GW-U with the 2nd GW-U mark corresponding 2nd GW-U difference, Xiang Suoshu UE Initiate to rebuild the request message of PDN connection, the request message is for triggering the UE the 2nd PDN connection of initiation, and described second PDN is connected as the PDN connection between the UE and the 2nd GW-U.

Optionally, processor 1901 is also used to: Xiang Suoshu UE initiates the request message for disconnecting the first PDN connection, institute It states to carry in request message and is used to indicate the parameter that the UE establishes the 2nd PDN connection.

Wherein, in Figure 19, bus architecture (is represented) with bus 1900, and bus 1900 may include any number of mutual The bus and bridge of connection, bus 1900 will include that the one or more processors represented by processor 1901 and memory 1902 represent Memory various circuit connections together.Bus 1900 can also will such as peripheral equipment, voltage-stablizer and power management electricity Together, these are all it is known in the art for various other circuit connections on road or the like, therefore, no longer carries out herein to it It further describes.

Processor 1901 is responsible for management bus 1900 and common processing, and memory 1902 can be used to store processing The used data when executing operation of device 1901.

Various change mode and specific reality in the method for update user plane gateway in earlier figures 10 and Figure 11 embodiment Example is equally applicable to the mobile management entity of the present embodiment, by the aforementioned detailed description to the method for updating user plane gateway, Those skilled in the art are clear that the implementation method of mobile management entity in the present embodiment, so in order to illustrate book Succinctly, this will not be detailed here.

It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function The division progress of unit can according to need and for example, in practical application by above-mentioned function distribution by different function lists Member is completed, i.e., the internal structure of device is divided into different functional units, to complete all or part of function described above Energy.The specific work process of the system, apparatus, and unit of foregoing description, can be with reference to corresponding in preceding method embodiment Journey, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed system, device and method can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit or The division of unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute Display or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit Indirect coupling or communication connection can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list Member both can take the form of hardware realization, can also realize in the form of software functional units.

If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer It is each that equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute the application The all or part of the steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, ROM (Read- Only Memory, read-only memory), RAM (Random Access Memory, random access memory), magnetic or disk Etc. the various media that can store program code.

The above, above embodiments are only described in detail to the technical solution to the application, but the above implementation The explanation of example is merely used to help understand method and its core concept of the invention, should not be construed as limiting the invention.This In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover Within protection scope of the present invention.

Claims (8)

1. a kind of method for updating user plane gateway characterized by comprising

During the first packet data network PDN establishment of connection between user equipment (UE) and the first user plane gateway, control Veil processed closes to mobile management entity and sends the corresponding tracking area TA identification list of first user plane gateway；

The control plane gateway receives notification message from the mobile management entity, and the notification message is for notifying the control The TA that veil closes the TA where the UE is identified not in the TA identification list；

The control plane gateway initiates to rebuild the request message of PDN connection to the mobile management entity, in the request message Carrying is used to indicate the parameter that the UE establishes the 2nd PDN connection；

During the 2nd PDN establishment of connection that the UE is initiated according to the parameter, the control plane gateway selection Second user veil closes, and is closed using the second user veil and completes the 2nd PDN establishment of connection, and the 2nd PDN connects The PDN connection being connected between the UE and second user veil pass.

2. the method as described in claim 1, which is characterized in that the request message is used to indicate the mobile management entity and deletes Except the first PDN connection.

3. method according to claim 1 or 2, which is characterized in that it is described be used to indicate the UE and establish the 2nd PDN connect The parameter connect is cause value, and PDN connection is rebuild in the cause value instruction.

4. a kind of device for updating user plane gateway characterized by comprising

Transmission unit, for the first packet data network PDN connection between user equipment (UE) and the first user plane gateway In establishment process, the corresponding tracking area TA identification list of first user plane gateway is sent to mobile management entity；

Receiving unit, for receiving notification message from the mobile management entity, the notification message is for notifying control veil The TA for closing the TA where the UE is identified not in the TA identification list；

Request unit is taken in the request message for initiating the request message of reconstruction PDN connection to the mobile management entity Band is used to indicate the parameter that the UE establishes the 2nd PDN connection；

Unit is established, during the 2nd PDN establishment of connection for being initiated in the UE according to the parameter, selection the Two user plane gateways are closed using the second user veil and complete the 2nd PDN establishment of connection, the 2nd PDN connection For the PDN connection between the UE and second user veil pass.

5. device as claimed in claim 4, which is characterized in that the request message is used to indicate the mobile management entity and deletes Except the first PDN connection.

6. device as described in claim 4 or 5, which is characterized in that it is described be used to indicate the UE and establish the 2nd PDN connect The parameter connect is cause value, and PDN connection is rebuild in the cause value instruction.

7. a kind of computer readable storage medium, which is characterized in that program is stored on the storage medium, when program is run When, realize the method as described in any one of claims 1-3 for updating user plane gateway.

8. a kind of device for updating user plane gateway characterized by comprising

Hardware relevant to program instruction, the hardware is for method described in any one of perform claim requirement 1 to 3.