CN104995956A

CN104995956A - Method, device and system for establishing data channel

Info

Publication number: CN104995956A
Application number: CN201380073115.7A
Authority: CN
Inventors: 张艳平; 舒林; 朱奋勤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-09-25
Filing date: 2013-09-25
Publication date: 2015-10-21
Anticipated expiration: 2033-09-25
Also published as: WO2015042791A1; CN104995956B

Abstract

Provided are a method, device and system for establishing a data channel, relating to the field of communications and for ensuring that a UE processes a service normally and improving user experience. The method comprises: receiving a routing area or tracking area update request message sent from a UE; when determining that context information about the UE exists and a first serving gateway (SGW) and a packet data gateway (PGW) of the UE in the context information are marked as invalid, sending to the first SGW an operation instruction message so that the first SGW establishes a data channel with the PGW according to the operation instruction message; alternatively, when determining that context information about the UE exists and the first SGW and the PGW of the UE in the context information are marked as invalid, determining a second SGW, and sending to the second SGW an operation instruction message so that the second SGW establishes a data channel with the PGW according to the operation instruction message.

Description

Method, device and system for establishing data channel

A kind of method, the apparatus and system technical field of data channel foundation

The present invention relates to method, the apparatus and system of the communications field, more particularly to a kind of foundation of data channel.

Background technology

In current wireless network, terminal can be moved arbitrarily.With the movement of terminal, be the good business of terminal month SGSN (Serving GPRS Support Node, the moon good business GPRS Support Node）Or MME (Mobility Management Entity, mobile management network element）It can change, now, terminal needs to be tracked area's renewal or Routing Area Update.Terminal initiating updating of tracking area or Routing Area Update flow, and then update tracking area or Route Area.

In the prior art, after terminal initiating updating of tracking area or Routing Area Update flow, new SGSN or MME obtain the context of terminal, and select for terminal new SGW (Serving Gateway, gateway）, the message for creating session is sent to new SGW, wherein there is PGW (Packet Data Network Gateway, packet data gateway in message）Information.New SGW is received after message, and new information is sent to PGW according to PGW information, so that PGW updates user plane information and chain of command information.Now, data channel is set up between new SGW and PGW, is terminal service.Because some reason UE can not be accessed in target, such as position area is limited, when terminal may send Route Area or tracing section updating request to former SGSN or MME.Former SGSN or MME it is determined that this UE context exist, and SGW and PGW be marked as it is invalid in the case of, former SGSN or MME to former SGW send modification bearing request message.

State in realization in flow, inventor has found at least there is problems with：New position is moved in terminal, initiates after Route Area or tracing section updating flow, new SGW user plane information and chain of command information is saved in PGW.When terminal accesses old SGSN/MME, that for terminal service is former SGW, due to the user plane information and chain of command information for new SGW preserved in PGW, so not setting up data channel between original SGW and PGW, downlink data can not be sent to UE by former SGW, so as to cause UE can not be normally carried out business Processing, have impact on Consumer's Experience.

The content of the invention

Embodiments of the invention provide method, the apparatus and system that a kind of data channel is set up, and to ensure that UE is normally carried out business processing, improve Consumer's Experience.

To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：

In a first aspect, the embodiments of the invention provide a kind of data channel set up method, including：Receive Route Area or tracing section updating request message that user equipment (UE) is sent；When it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to-the SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW；Or, when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, determine the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW according to the operation instruction Messages Message, data channel is set up with the PGW, wherein, the operation instruction message is to indicate that SGW sends the message of first message to the PGW；The first message is the message that SGW and the PGW set up data channel.

In the first possible implementation of first aspect, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the first message includes：- the SGW is the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that UE carries distribution, and the first SGW is the TEID and IP address for the chain of command that UE is distributed；When it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, the first message includes the Tunnel End Point Identifier TEID and internet protocol address that the 2nd SGW is the user plane that UE carries distribution, and the 2nd SGW is TE I D and the I P addresses for the chain of command that UE is distributed；The operation instruction message includes：The TEID I P addresses of the user plane of the PGW and the TEID I P addresses of chain of command.

With reference to the first possible implementation of first aspect or first aspect, in second of possible implementation of first aspect, the operation instruction message is held added to modification Carry in request message；It is described to include to the first SGW transmissions operation instruction message：The modification bearing request message is sent to the first S GW, is disappeared wherein carrying the operation instruction in the modification bearing request message,.

With reference to first aspect or the first of first aspect or second of possible implementation, in the third possible implementation of first aspect, before the transmission operation instruction message to the first SGW, in addition to：It is determined that service UE SGW changes.

With reference to first aspect, or the first possible implementation of first aspect, in the 4th kind of possible implementation of first aspect, when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, in addition to：When it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, is sent to the first SGW and delete conversation message, to cause the first S GW to delete the contextual information of the UE；TE I D and I P addresses of the first SGW for the UE chains of command distributed is carried in the deletion conversation message；Receive the deletion conversational response message that-SGW is sent.

With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation of first aspect, before the transmission deletion conversation message to the first SGW, in addition to：It is determined that service UE SGW changes.

With reference to the 4th or the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation of first aspect, it is described determine service UE SGW change including：Receive the SGW change configured informations that first service node is sent；Configured information is changed according to the SGW, it is determined that service UE SGW changes.

With reference in a first aspect, or first aspect the first or first aspect the 4th to the 6th any possible implementation, in the 7th kind of possible implementation of first aspect, by the operation instruction message added to creating conversation request message；The first message includes：Change bearer messages；When it is determined that UE first service gateway S GW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, it is described to include to the first SGW transmissions operation instruction message in the case of sending operation instruction message to the first SGW：Send to create in conversation request message, the establishment conversation request message to the first S GW and carry operation instruction message；It is determined that the contextual information of the UE In the presence of and contextual information described in UE the first SGW and PGW labeled as it is invalid when, in the case of determining the 2nd SGW, it is described to the 2nd SGW send operation instruction message include：Send to create in conversation request message, the establishment conversation request message to the 2nd SGW and carry operation instruction message.

With reference to first aspect, or the first of first aspect is to the 7th any possible implementation, in the 8th kind of possible implementation of first aspect, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the operation instruction message is：Chain of command TE I D and the I P addresses of the PGW.

In second aspect, the embodiments of the invention provide a kind of method that data channel is set up, including：Receive the operation instruction message that service node is sent；Wherein, the operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages；The first message is that the message of data channel is set up for the SGW and the PGW；According to the operation instruction message, first message is sent to packet data gateway PGW.

In the first possible implementation of second aspect, the first message includes：The S GW are the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that user equipment (UE) carries distribution, and the SGW is TE I D and the I P addresses for the chain of command that UE is distributed.

With reference to the first possible implementation of second aspect or second aspect, in second of possible implementation of second aspect, the operation instruction message for receiving service node transmission includes：The modification bearing request message that service node is sent is received, wherein, carry operation instruction message in the modification bearing request message.

With reference to second aspect, or the first of second aspect or second of possible implementation, in the third possible implementation of second aspect, the operation instruction information is：Chain of command TE I D and the I P addresses of the PGW.

With reference to the first possible implementation of second aspect, in the 4th kind of possible implementation of second aspect, the operation instruction includes：TE I D and the I P addresses of the user plane of the PGW and TE I D and the I P addresses of chain of command.

With reference to first or the 4th kind of possible implementation of second aspect, or second aspect, In the 5th kind of possible implementation of second aspect, before the operation instruction message that the reception service node is sent, in addition to：Receive the deletion conversation message that the service node is sent；TEIDs and IP address of the first SGW for the UE chains of command distributed are carried in the deletion conversation message；According to the TEID of the first SGW carried in the deletion conversation message chain of command, the UE of storage contextual information is deleted；Returned to the service node and delete conversational response message.

With reference to second aspect, or the first of second aspect or the 4th or the 5th kind of possible implementation, in the 6th kind of possible implementation of second aspect, the first message includes：Change bearer messages；The operation instruction message for receiving service node transmission includes：Receive the establishment conversation request message that service node is sent；Operation instruction message is carried in the establishment conversation request message；The operation instruction information is used to indicate that SGW sends modification bearer messages to packet data gateway PGW.

The third aspect, the embodiments of the invention provide a kind of service node, including：Receiving unit, Route Area or tracing section updating request message for receiving user equipment (UE) transmission；Processing unit, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW；Or, when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, determine the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW that according to the operation instruction message, data channel is set up with the PGW.

In the first possible implementation of the third aspect, in the processing unit, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the first message includes：First SGW is the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that UE carries distribution, and the first SGW is TE I D and the I P addresses for the chain of command that UE is distributed；In the processing unit, for when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, described first to disappear Breath includes the Tunnel End Point Identifier TE I D and Internet protocol I P addresses that the 2nd SGW carries the user plane of distribution for UE, and the 2nd SGW is the TE I D and I P addresses for the chain of command that UE is distributed；The operation instruction message includes：TE I D and the I P addresses of the user plane of the PGW and TE I D and the I P addresses of chain of command.

With reference to the first possible implementation of the third aspect or the third aspect, in second of possible implementation of the third aspect, the processing unit is additionally operable to the operation instruction message being added in modification bearing request message；The processing unit to the first SGW specifically for sending the modification bearing request message, wherein carrying the operation instruction message in the modification bearing request message.

With reference to the first possible implementation of the third aspect or the third aspect, in the third possible implementation of the third aspect, the processing unit, it is additionally operable to when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, sent to the first SGW and delete conversation message, to cause the first SGW to delete the contextual information of the UE；The TE I D and I P addresses of-SGW for the UE chains of command distributed is carried in the deletion conversation message；The receiving unit, is additionally operable to receive the deletion conversational response message that-SGW is sent.

With reference to first to the 3rd any possible implementation of the third aspect, or the third aspect, in the 4th kind of possible implementation of the third aspect, the processing unit is additionally operable to determine that service UE SGW changes.

With reference to the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation of the third aspect, the receiving unit is additionally operable to receive the S GW change configured informations that first service node is sent；The processing unit, configured information is changed specifically for the SGW received according to the receiving unit, it is determined that service UE SGW changes.

With reference to the third aspect, or the first of the third aspect or the third possible implementation, in the 6th kind of possible implementation of the third aspect, the processing unit is additionally operable to the operation instruction message being added to establishment conversation request message；The first message includes：Change bearer messages；It is used in the processing unit when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, it is described in the case of sending operation instruction message to the first S GW Processing unit, includes for sending operation instruction message to the first SGW：Send to create in conversation request message, the establishment conversation request message to the first SGW and carry operation instruction message；It is used in the processing unit when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd S GW, the processing unit, includes for sending operation instruction message to the 2nd SGW：Send to create in conversation request message, the establishment conversation request message to the 2nd SGW and carry operation instruction message.

With reference to the third aspect, or the first of the third aspect is to the 6th any possible implementation, in the 7th kind of possible implementation of the third aspect, the processing unit is used for when it is determined that UE first service gateway S GW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the operation instruction message is：Chain of command TE I D and the I P addresses of the PGW.

Fourth aspect, the embodiments of the invention provide a kind of gateway SGW, including：Receiving unit, the operation instruction message for receiving service node transmission；Wherein, the operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages；The first message is that the message of data channel is set up for the SGW and the PGW；Processing unit, for the operation instruction message received according to the receiving unit, first message is sent to packet data gateway PGW.

In the first possible implementation of fourth aspect, the first message includes：The S GW are the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that user equipment (UE) carries distribution, and the SGW is TE I D and the I P addresses for the chain of command that UE is distributed.

With reference to the first possible implementation of fourth aspect or fourth aspect, in second of possible implementation of fourth aspect, the receiving unit, specifically for receiving the modification bearing request message that service node is sent, wherein, operation instruction message is carried in the modification bearing request message.

With reference to fourth aspect or the first of fourth aspect or second of possible implementation, in the third possible implementation of fourth aspect, the operation instruction information is：Institute State PGW chain of command TE I D and I P addresses.

With reference to fourth aspect, in the 4th kind of possible implementation of fourth aspect, the operation instruction includes：The TEID and IP address of the user plane of the PGW and TEID the and I P addresses of chain of command.

With reference to fourth aspect, or fourth aspect the first or the 4th kind of possible implementation, in the 5th kind of possible implementation of fourth aspect, in addition to：Transmitting element；The receiving unit, is additionally operable to receive the deletion conversation message that the service node is sent；TEID and IP addresses of the first SGW for the UE chains of command distributed is carried in the deletion conversation message；The processing unit, is additionally operable to the TEID of the first SGW carried in the deletion conversation message according to receiving unit reception chain of command, deletes the UE of storage contextual information；The transmitting element, conversational response message is deleted for being returned to the service node.

With reference to fourth aspect, or fourth aspect the first or the 4th kind or the 5th kind of possible implementation, in the 6th kind of possible implementation of fourth aspect, the first message includes：Change bearer messages；The receiving unit, specifically for receiving the establishment conversation request message that service node is sent；Operation instruction message is carried in the establishment conversation request message；The operation instruction information is used to indicate that SGW sends modification bearer messages to packet data gateway PGW.

5th aspect, the embodiments of the invention provide a kind of service node, including：Receiver, for Route Area or the tracing section updating request message for receiving user equipment U E transmissions；Processor, for for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW；Or, when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, determine the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW that according to the operation instruction message, data channel is set up with the PGW.

6th aspect, the embodiments of the invention provide a kind of gateway SGW, including：Connect Device is received, for the operation instruction message for receiving service node transmission；Wherein, the operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages；The first message is that the message of data channel is set up for the SGW and the PGW；Processor, for the operation instruction message for being received according to the receiver, first message is sent to packet data gateway PGW.

7th aspect, the embodiments of the invention provide the system that a kind of data channel is set up, including：Service node, gateway SGW and packet data gateway PGW;Wherein, the service node is the service node described in above-described embodiment；The SGW is the SGW described in above-described embodiment.

The embodiments of the invention provide a kind of method of data channel foundation, apparatus and system, after the Route Area of UE transmissions or tracing section updating request message is received, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message can be sent to the first SGW, to cause the first SGW to receive after operation instruction information, data channel is set up with PGW.Or, it may be determined that the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW to receive after operation instruction information, data channel is set up with PGW.So, UE is when returning to original SGSN or MME, UE former SGW can be made to continue as the good business of the UE months, the first SGW is as set to continue as UE services, data channel now is established between UE the first SGW and PGW, UE data can be sent to PGW by this first SGW, while PGW can also be sent downlink data to UE by this first SGW, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.Or, other SGW are selected to be serviced for UE, as determine the 2nd SGW, and the data channel set up between the 2nd SGW and PGW, UE data are sent to PGW by this 2nd SGW, PGW can also be sent downlink data to UE by this 2nd SGW simultaneously, so as to will ensure that UE is normally carried out business processing, improve Consumer's Experience.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, it should be evident that drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

The schematic diagram for the method that Fig. 1 sets up for a kind of data channel provided in an embodiment of the present invention；

The schematic diagram for the method that Fig. 2 sets up for another data channel provided in an embodiment of the present invention；

The schematic diagram for the method that Fig. 3 sets up for another data channel provided in an embodiment of the present invention；

The schematic diagram for the method that Fig. 4 sets up for another data channel provided in an embodiment of the present invention；

Fig. 5 is a kind of functional schematic of service node provided in an embodiment of the present invention；Fig. 6 is a kind of gateway S GW functional schematic provided in an embodiment of the present invention；Fig. 7 is another gateway S GW provided in an embodiment of the present invention functional schematic；Fig. 8 is a kind of structural representation of service node provided in an embodiment of the present invention；Fig. 9 is a kind of gateway S GW structural representation provided in an embodiment of the present invention；The schematic diagram for the system that Fig. 10 sets up for a kind of data channel provided in an embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

The embodiments of the invention provide a kind of method that data channel is set up, as shown in Fig. 1, including：

101, UE (U s e r E qu i pmen t, user equipment are received）The Route Area of transmission or tracing section updating request message.

Specifically, UE is when being moved to the service range of service node, Route Area or tracing section updating request message can be sent to this service node to access this service node, is now serviced Node receives this Route Area or tracing section updating request message.

It should be noted that in all embodiments of the invention, when user is from GERAN, when UTRAN is accessed, the moon, good business node can be with SGSN (Serving GPRS (General Packet Radio Service, GPRS）Support Neder land, the moon good business GPRS supporting nodes）, the message of reception is Routing Area Update message；Or when user accesses from E-UTRAN, the moon, good business node was MME (Mobility Management Entity, mobile " the students management network element of ' 1）, the message of reception is tracing section updating message.Certainly other network equipments are can also be, the present invention is without limitation.

It should be noted that being moved to the service range of other service nodes when service node services for it the present invention be directed to UE, and Route Area or tracing section updating are carried out, now this service node is not serviced for the UE.UE moves the service range of so far service node again, and asks to this service node to carry out the scene of Route Area or tracing section updating flow.

It should be noted that service node is it is determined that the first SGW (the Serving Gateway, gateway of UE described in the contextual information presence of the UE and contextual information）With PGW (Packet Data Network Gateway, packet data gateway）Labeled as it is invalid when, can be continuing with the first SGW be UE service, it is possible to use other SGW be UE service.Different according to the SGW used, then step performed below is different.If the first SGW continues as UE services, step 102a is performed, if selecting other SGW to be serviced for UE, step 102b_103b is performed.

102a, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW.

Wherein, the operation instruction message is used to indicate that SGW sends first message to the PGW.The first message is that the message of data channel is set up for SGW and the PGW.First SGW is the gateway that service node is stored in UE contextual informations.

It should be noted that now service node sends operation instruction message to the first SGW, then now operation instruction message can indicate that the first SGW sends first message to the PGW.

If, can be with specifically, service node determines the contextual information for this UE that is stored with Further determine that the first SGW and PGW of UE described in contextual information whether labeled as invalid, if it is determined that the first SGW and PGW of UE described in contextual information is labeled as invalid, then illustrate this current PGW, SGW, and the path between service node is invalid, it is impossible to provide effective service for UE.Service node can send operation instruction message to the first SGW, be serviced again for UE with causing the first SGW, as PGW, path between SGW, and service node effectively, and passes through PGW, the data of path transmission UE between SGW, and service node.

Further, the first message includes：First SGW be UE carry oneself user plane of point tenth of the twelve Earthly Branches TEID (Tunnel Endpoint Identifier, road end, mark mouth) and IP (Internet Protocol, Internet protocol）Address, the first SGW is the TE I D and I Ρ addresses for the chain of command that the UE is distributed.

Now, service node sends this operation instruction message to the first SGW, so that the first SGW sends user plane TEID and IP address that the first SGW is UE carrying distribution and TEID and IP address that the first SGW is the chain of command that UE is distributed to PGW, so that PGW preserves TE I D and the I P addresses of the user plane TEID and IP address that-SGW is UE carrying distribution and the chain of command that the first SGW is UE distribution, so as to establish the data channel between PGW, so as to transmit UE data.

It should be noted that, service node sends operation instruction message to the first SGW method, it can be that directly operation instruction message is sent to the first SGW as a new information or operation instruction message is added in an existing message, send to the first SGW.

Specifically, service node can be by operation instruction message added to changing in bearing request message, service node sends the modification bearing request message to the first SGW, wherein carrying the operation instruction message in the modification bearing request message.

Sent that is, operation instruction message is added in existing message, modification bearing request message to the first SGW.

Or, service node can be by operation instruction message added to creating in conversation request message, now, and first message can be modification bearer messages.Service node sends to the first SGW and creates conversation request message.

Wherein, operation instruction message is carried in the establishment conversation request message.Now, The operation instruction information can indicate that the first SGW sends modification bearer messages to packet data gateway PGW, and modification bearer messages include chain of command TE I D and I the P addresses that the first SGW is the UE distribution and user plane TEID and IP address that the first SGW is the UE carryings distribution.

It should be noted that operation instruction message can be also added in other existing message by service node, the present invention is sent to the and is not limited with SGW to which existing message is operation instruction message is specifically added in.

Can be that a cell is newly increased in existing message it should be noted that operation instruction message is added in existing message, when this cell takes some value, for example, when value is 1, then it represents that with the addition of this operation instruction message in existing message.If this cell does not take this value, then it represents that do not add this operation instruction message in existing message.Certainly, it can also represent that operation instruction message is added in existing message by other means.The present invention is without limitation.

Further, the operation instruction message is the chain of command TEID and IP addresses of the PGW.As service node represents operation instruction message with PGW chain of command TEID and IP address.Now, service node sends PGW chain of command TEID and IP address to-SGW, with cause the first SGW receive service node transmission PGW chain of command TEID and IP address after, to PGW send first message, and then set up and PGW between data channel.

Further, PGW chain of command TEID and IP address can be added in existing message and send to the first SGW by service node, can also be sent PGW chain of command TEID and IP addresses as the content of a new information to the first SGW.

102b, it is determined that the UE context exist and context described in UE the first SGW and PGW labeled as it is invalid when, determine the 2nd SGW.

Specifically, if service node is determined in the presence of this UE contextual information, it may further determine that the first SGW and PGW of UE described in contextual information whether labeled as invalid, if it is determined that the first SGW and PGW of UE described in contextual information is labeled as invalid, then illustrate this current PGW, path between SGW, and service node is invalid, it is impossible to provide effective service for UE.Service node can re-establish the path between other SGW and PGW, and service node.Now, service node can determine second from the SGW of its management SGW。

It it should be noted that service node determines the 2nd SGW, can be selected according to the rule pre-set, can also randomly choose a SGW as the 2nd SGW, the present invention is without limitation.

103b, sends operation instruction message, to cause the 2nd SGW that according to the operation instruction message, data channel is set up with the PGW to the 2nd SGW.

It should be noted that service node sends operation instruction message to the 2nd SGW, now the operation instruction message can indicate that the 2nd SGW sends first message to the PGW.

Further, the first message includes：2nd SGW is TE I D and the I P addresses for the user plane that UE carries distribution, and the 2nd SGW is TE I D and the I P addresses for the chain of command that the UE is distributed.The operation instruction message includes：TE I D and the I P addresses of the user plane of the PGW and TE I D and the I P addresses of chain of command.

Specifically, service node is after the 2nd SGW is determined, operation instruction message is sent to the 2nd SGW, wherein, operation instruction message includes the TEID and the TEID and IP address of IP address and chain of command of PGW user plane, so that the 2nd SGW is received after operation instruction information, know the TEID and IP address of PGW user plane and the TEID and IP address of chain of command, and according to operation instruction message, it is that TE I D and the I P addresses that user plane TEID and the I P address and the 2nd SGW of UE carrying distribution are the chain of command of the UE distribution are sent to PGW by the 2nd SGW, so that it is TE I D and the I P addresses that user plane TEID and the I P address and the 2nd SGW of UE carrying distribution are the chain of command of the UE distribution that PGW, which preserves the 2nd SGW, so as to establish the data channel between PGW, so as to transmit UE data.

It should be noted that, operation instruction message is sent to the 2nd SGW method, it can be that directly operation instruction message is sent to the 2nd SGW as a new information or operation instruction message is added in an existing message, send to the 2nd SGW.

Service node can be by operation instruction message added to creating in conversation request message, now, and first message can be modification bearer messages.Service node sends to the 2nd SGW and creates conversation request message.

Wherein, operation instruction message is carried in the establishment conversation request message.Now, the operation instruction information can indicate that the 2nd SGW is sent to packet data gateway PGW Change bearer messages.And modification bearer messages include chain of command TE I D and I the P addresses that the 2nd SGW is the UE distribution and user plane TEID and IP address that the 2nd SGW is the UE carryings distribution.Creating conversation request message includes the PGW TEID and the TEID and IP address of IP address and chain of command of user plane.

It should be noted that operation instruction message can be also added in other existing message by service node, the present invention sends to the 2nd SGW and is not limited to which existing message is operation instruction message is specifically added in.

The embodiments of the invention provide a kind of method that data channel is set up, after the Route Area of UE transmissions or tracing section updating request message is received, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message can be sent to the first SGW, to cause the first SGW to receive after operation instruction information, data channel is set up with PGW.Or, it may be determined that the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW to receive after operation instruction information, data channel is set up with PGW.So, UE is when returning to original SGSN or MME, UE former SGW 1 can be made to continue for the good business of the UE months, the first SGW is as set to continue as UE services, now data channel is established between UE the first SGW and PGW, UE data can be sent to PGW by this first SGW, at the same PGW also can by this

- SGW sends downlink data to UE, so as to will ensure that UE is normally carried out business processing, improves Consumer's Experience.Or, other SGW are selected to be serviced for UE, as determine the 2nd SGW, and the data channel set up between the 2nd SGW and PGW, UE data are sent to PGW by this 2nd SGW, PGW can also be sent downlink data to UE by this 2nd SGW simultaneously, so as to will ensure that UE is normally carried out business processing, improve Consumer's Experience.

The embodiments of the invention provide a kind of method for building up of data channel, as shown in Fig. 2, Including：

201st, the operation instruction message that service node is sent is received.

Wherein, the operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages.The first message is that the message of data channel is set up for the SGW and the PGW.

Further, SGW receives the modification bearing request message that service node is sent, wherein, carry operation instruction message in the modification bearing request message.That is, operation instruction message is added in existing message by service node, send to SGW.

It should be noted that operation instruction message can be as single message, now SGW receives the operation instruction message of service node transmission.Operation instruction message also may be added to that in existing message that now SGW receives the existing message for carrying operation instruction message of service node transmission.

Further, the operation instruction message can be：The chain of command TEID and I P addresses of the PGW.Now, SGW receives the chain of command TEID and IP address that operation instruction message is PGW.So, SGW is after chain of command TE I D and the I P addresses as the PGW of operation instruction message are received, and can trigger SGW and further perform to PGW sending first message, and then the step of set up data channel between PGW.

It should be noted that, if SGW is the SGW in the UE contextual informations of service node storage, then the operation instruction message can be chain of command TE I D and the I P addresses of the PGW, SGW can be caused to be connected to after PGW chain of command TEID and IP address, triggering SGW performs below step.If SGW be not service node storage UE contextual informations in SGW, but service node newly select for UE service SGW, then operation instruction message include：TE I D and the I P addresses of the user plane of the PGW and TE I D and the I P addresses of chain of command so that SGW keeps the TEID and the TEID and IP address of IP address and chain of command of PGW user plane, to set up data channel between SGW and PGW.

202nd, according to the operation instruction message, first message is sent to packet data gateway

PGW。

Wherein, the first message can include：SGW is the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that UE carries distribution, and SGW is the control that the UE is distributed The TEID and IP address in face face processed.

Specifically, SGW is after operation instruction message is received, by TE I D and the I P addresses that SGW is the user plane that UE carries distribution, TE I D and I P addresses for the UE chains of command distributed are sent to PGW, to cause PGW to preserve TE I D and the I P addresses for the chain of command that the SGW carries user plane TEID and the I P address distributed as UE and the SGW is UE distribution, so as to establish the data channel between PGW, so as to transmit UE data.

The embodiments of the invention provide a kind of method that data channel is set up, SGW is received after operation instruction message, first message is sent to PGW, to cause PGW to preserve TE I D and the I P addresses that SGW carries the user plane of distribution as UE, SGW is TEID the and I P addresses for the chain of command that UE is distributed, so as to establish the data channel between SGW and PGW.So, UE is when returning to original SGSN or MME, data channel can will be set up between UE former SGW and PGW, UE data are sent to PGW by this former SGW, PGW can also be sent downlink data to UE by this former SGW simultaneously, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.

The embodiments of the invention provide a kind of method that data channel is set up, including：

301st, UE sends Route Area or tracing section updating request message to first service node, and first service node receives Route Area or tracing section updating request message.

Specifically, UE is moved to the service range of first service node, it is necessary to access first service node, then sends Route Area or tracing section updating request message to first service node when second service node services for it.Step 101 is may be referred to, be will not be repeated here.

302nd, first service node determines that the contextual information of the UE whether there is.

Specifically, first service is received after Route Area or the tracing section updating request message of UE transmissions, this UE contextual information is determined whether from the UE stored contextual information.

303rd, first service node sends UE context information request message to second service node when the contextual information for determining UE is not present, and second service node receives UE context information request messages.

Specifically, first service node is when the contextual information for determining the UE is not present, when there is no the contextual information for storing UE in first service node as, to UE original Service node is the context information request message that second service node sends UE, to obtain UE contextual information.

304th, second service node sends UE contextual information to first service node, and starts the contextual information that timer management is locally preserved.First service node receives UE contextual information.

Specifically, second service node knows that UE will access first service node, the UE oneself stored contextual information is sent to first service node after the UE context information request message of first service node transmission is received.Also, due to knowing that UE will access first service node, so as to start timer, in timer expiry, the UE of storage contextual information is deleted.

305th, first service node sends confirmation message to second service node.Second service receives confirmation message.

Specifically, first service node sends confirmation message after the UE contextual information of second service node transmission is received to second service node.When first service node is defined as the new S GW of UE selections, then S GW is changed into configured information and be added in confirmation message, sent to second service node.

Wherein, SGW, which changes configured information, can include SGW identification information.

306th, second service node is handled accordingly according to confirmation message.

Specifically, second service node is after confirmation message is received, then it is invalid to be set to the first SGW and PGW mark.

Wherein the first SGW for second service node administration SGW in store UE contextual information S GW

Further, when carrying S GW change configured informations in the acknowledgement message, record SGW changes configured information.

307th, first service node determines the 3rd SGW, and sends establishment conversation message to the 3rd SGW.3rd S GW, which are received, creates conversation message.

Wherein, the information that PGW is carried in conversation message is created.

Further, PGW information includes：TE I D and the I P addresses of PGW chain of command, TE I D and the I P addresses of user plane. 308th, the 3rd SGW sends new information according to PGW information to PGW.PGW receives new information.

Wherein, new information includes：3rd SGW is TEID the and I P addresses for the chain of command that UE is distributed, and the 3rd SGW is TE I D and the I P addresses for the user plane that UE carries distribution.

Specifically, 3rd SGW is received after the establishment conversation message of first service node transmission, the PGW carried according to creating in conversation message information, new information is sent to PGW, to cause PGW to update TEIDs and IP address of the SGW preserved as the UE chains of command distributed, SGW is TE I D and the I P addresses for the user plane that UE carries distribution, to set up the data channel between PGW and the 3rd SGW.

309th, PGW updates TE I D and I P addresses of the SGW of storage for the UE chains of command distributed according to new information, and SGW is TE I D and the I P addresses for the user plane that UE carries distribution.

Specifically, PGW is received after the new information of the 3rd SGW transmissions, by TE I D and I P addresses of the SGW of storage for the chain of command of UE distribution, SGW is that TE I D and the I P addresses for the user plane that UE carries distribution are updated to TEID the and I P addresses for the chain of command that the 3rd SGW is UE distribution, 3rd SGW is TE I D and the I P addresses for the user plane that UE carries distribution, to set up the data channel between the 3rd SGW.

310th, PGW is sent to the 3rd SGW updates response message, and the 3rd SGW, which is received, updates response message.

Specifically, PGW is updating TEIDs and IP address of the SGW for the UE chains of command distributed, after SGW is the TEID and IP address of the user plane of UE carrying distribution, sent to the 3rd SGW and update response message.

311st, the 3rd SGW is sent to first service node creates conversational response message, and first service node, which is received, creates conversational response message.

312nd, due to the refusal UE accesses of first service node, UE may send Route Area or tracing section updating request message to second service node.Second service node receives Route Area or tracing section updating request message.

Specifically, because some reasons, such as regional location is limited, in first service node checks HSS (Home Subscriber Server, the good business device of home network month）When obtaining mouth and can not access UE, or, when UE is re-moved to the scope of second service node serve, UE to Second receives transmission Route Area or tracing section updating request message.Specifically, referring to step

101。

313rd, second service node determines whether to preserve the contextual information of the UE.Specifically, service node determines whether to save this UE contextual information after the Route Area of UE transmissions or tracing section updating request message is received from the UE stored contextual information.

If second service node determines the contextual information for not preserving this UE, service node carries out UE Route Area or tracing section updating flow according to the UE Route Areas sent or tracing section updating request message.Specific flow with it is identical in the prior art, will not be repeated here.

314th, whether second service node is it is determined that in the presence of the contextual information of the UE, detect the first SGW and PGW of UE in UE contextual information labeled as invalid.

Specifically, second service node is in the presence of UE contextual information is determined, illustrate to be stored with second service node UE contextual information, then whether second service node can detect the first SGW and PGW of UE in UE contextual information labeled as invalid.If UE the first SGW illustrates the first SGW, the data channel between PGW and second service node is effective, directly can transmit data for UE, and no longer perform following step with being not flagged as invalid in PGW in UE contextual information.

If second service node is in the presence of UE contextual information is determined, and determine the first SGW and PGW of UE in UE context information labeled as it is invalid when, perform following step.

315th, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, second service node determines that service UE SGW changes.

It should be noted that in all embodiments of the invention, service node determines that service UE SGW changes and refers to that service node determines whether the first SGW and the 3rd SGW is same SGW.Wherein, the 3rd SGW is the SGW for being used to service UE that first service node is determined.

Specifically, in step 305, if first service node have selected other SGW, generation SGW changes configured information, and sends to second service node.Second service node changes configured information according to the SGW, it is determined that service UE SGW changes.As, root Change configured information according to the SGW, it is determined that the 3rd SGW for servicing the UE is not the first SGW, and perform following step.

If in step 305, first service node does not select other SGW, now service UE SGW does not change, as first service node selects the first SGW as UE service SGW, that is, the 3rd SGW is exactly the first SGW, then now second service node determines that the 3rd SGW for servicing the UE is the first SGW, so as to which the path between the first SGW and PGW is effective, UE data can be transmitted.No longer perform following step.

It should be noted that, when second service node determines the contextual information for preserving the UE, and when UE the first SGW and PGW is marked as invalid in contextual information, and second service node determines service UE SGW when changing, the step of being performed below has two kinds of situations.A kind of situation is to retain the UE preserved in the first SGW session, directly sends operation instruction information to the first SGW, then execution step 319a-320a, 322,323a-324a, as shown in Figure 3.Another situation is that the session for the UE that will be preserved in the first SGW is deleted, and creates UE session with the 2nd SGW again, then execution step 316b-321b, 322,323b-324b, as shown in Figure 4.

316b, second service node it is determined that the UE contextual information exist and contextual information described in UE the first SGW and PGW labeled as it is invalid when, and in the case of determining that the SGW for servicing UE changes, sent to the first SGW and delete conversation message, to cause the first SGW to delete the contextual information of the UE.First SGW, which is received, deletes conversation message.

Wherein, it is described to delete TE I D and the I P addresses that the first SGW is carried in conversation message for the UE chains of command distributed.

Specifically, second service node determines to delete the UE preserved in the first SGW session, then sent to the first SGW and delete conversation message.

317b, the first SGW delete the UE of storage contextual information.

Specifically, first SGW is received after deletion conversation message, delete the TEID and IP address that the first SGW is carried in conversation message for the UE chains of command distributed, can be according to the TEID and IP address of chain of command, the UE of storage to be deleted mark is determined, this UE contextual information is deleted. 318b, the first SGW are sent to second service node deletes conversational response message, and second service node, which is received, deletes conversational response message.

Specifically, after the contextual information for the UE that the first SGW deletes storage, second service node being sent and deletes conversational response message, to inform that the SGW of second service node the first deletes the UE of storage contextual information.

319a, second service node determine the UE contextual information exist and contextual information described in UE first service gateway SGW and packet data gateway PGW labeled as it is invalid when, and in the case of determining that the SGW for servicing UE changes, second service node sends operation instruction message to the first SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW.First SGW receives operation instruction message.

Specifically, second service node sends operation instruction message to the first SGW refers to step 102a, the first SGW receives operation instruction message and refers to step 201, will not be repeated here.

319b, second service node determines the 2nd SGW.

It should be noted that new SGW can be defined as the 2nd SGW by second service node, the first SGW can be also defined as to the 2nd SGW, the present invention is without limitation.

It should be noted that, in the present invention is implemented, step 316b-318b can be first carried out, step 319b is performed again, also step 319b can be first carried out, then performs step 316b-318b, step 316b_318b and step 319b can be also performed simultaneously, the present invention is not limited to the order between step 316b-318b, with step 319b.A kind of situation is represented in the example shown.

320a, the first SGW send first message to packet data gateway PGW according to the operation instruction message.PGW receives first message.

Specifically, referring to step 202, it will not be repeated here.

320b, second service node sends operation instruction message to the 2nd SGW, to cause the 2nd SGW that according to the operation instruction message, data channel is set up with the PGW.2nd SGW receives operation instruction message.

Specifically, second service node sends operation instruction message to the 2nd SGW refers to step 103b, the 2nd SGW receives operation instruction message and refers to step 201, no longer goes to live in the household of one's in-laws on getting married herein State.

321b, the 2nd SGW send first message to packet data gateway PGW according to the operation instruction message.PGW receives first message.

Specifically, referring to step 202, it will not be repeated here.

322nd, PGW updates TE I D and I P addresses of the SGW of storage for the UE chains of command distributed according to first message, and SGW is TE I D and the I P addresses for the user plane that UE carries distribution.

Specifically, referring to step 309, it will not be repeated here.

323a, PGW send the response message of first message to the first SGW, and the first SGW receives the response message for the first message that the P GW are sent.

Specifically, referring to step 310, it will not be repeated here.

323b, PGW send the response message of first message to the 2nd SGW, and the 2nd SGW receives the response message for the first message that the P GW are sent.

Specifically, referring to step 310, it will not be repeated here.

324a, the first SGW send response message to second service node, and second service node receives response message.

Specifically, first SGW is after the first message response message of PGW transmissions is received, know that PGW has saved TEID and IP address that the first SGW carries the user plane distributed for UE, first SGW is the TEID and IP address for the chain of command that UE is distributed, as the first SGW and PGW has established data communication channel, response response message then is sent to second service node, to inform second service node, the data channel between the first SGW and PGW has been established.

324b, the 2nd SGW send response message to second service node, and second service node receives response message.

Specifically, 2nd SGW is after the first message response message of PGW transmissions is received, know that PGW has saved TEID and IP address that the 2nd SGW carries the user plane distributed for UE, 2nd SGW is the TEID and IP address for the chain of command that UE is distributed, as the 2nd SGW and PGW has established data communication channel, response response message then is sent to second service node, to inform second service node, the data channel between the 2nd SGW and PGW has been established.

The embodiments of the invention provide a kind of method that data channel is set up, service node is after the Route Area of UE transmissions or tracing section updating request message is received, it is determined that the UE When UE first service gateway SGW and packet data gateway PGW is labeled as invalid described in contextual information presence and contextual information, operation instruction message can be sent to the first SGW, to cause the first SGW to receive after operation instruction information, data channel is set up with PGW.Or, it may be determined that the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW to receive after operation instruction information, data channel is set up with PGW.So, UE is when returning to original SGSN or MME, UE former SGW can be made to continue as UE services, the first SGW is as set to continue as UE services, data channel now is established between UE the first SGW and PGW, UE data can be sent to PGW by this first SGW, while PGW can also be sent downlink data to UE by this first SGW, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.Or, other SGW are selected to be serviced for UE, as determine the 2nd SGW, and the data channel set up between the 2nd SGW and PGW, UE data are sent to PGW by this 2nd SGW, PGW can also be sent downlink data to UE by this 2nd SGW simultaneously, so as to will ensure that UE is normally carried out business processing, improve Consumer's Experience.

As shown in Fig. 5, a kind of functional schematic of its service node provided by the embodiment of the present invention.With reference to shown in Fig. 5, the service node includes：

Receiving unit 501, Route Area or tracing section updating request message for receiving user equipment (UE) transmission.

It should be noted that in all embodiments of the invention, when user is from GERAN, when UTRAN is accessed, the moon, good business node can be with SGSN (Serving GPRS (General Packet Radio Service, GPRS）Support Neder land, the moon good business GPRS supporting nodes）, the message of reception is Routing Area Update message；Or when user accesses from E-UTRAN, the moon, good business node was MME (Mobi l ity Management Entity, mobile " the students management network element of ' 1）, the message of reception is tracing section updating message.Certainly other network equipments are can also be, the present invention is without limitation.

Processing unit 502, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the first message, data channel is set up with the PGW. Wherein, the operation instruction message is used to indicate that SGW sends first message to the PGW.The first message is that the message of data channel is set up for SGW and the PGW.The first S GW are the gateway that service node is stored in UE contextual informations.

Further, in the processing unit 5 02, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first S GW, the first message includes：The first S GW are Tunnel End Point Identifier TE I D and Internet protocol I the Ρ address for the user plane that UE carries distribution, and the first SGW is TE I D and the I P addresses for the chain of command that UE is distributed.

Further, the processing unit 5 02 is used for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first S GW, the operation instruction message is：Chain of command TE I D and the I P addresses of the PGW.

It should be noted that, processing unit sends operation instruction message to the first SGW method, it can be that directly operation instruction message is sent to the first SGW as a new information or operation instruction message is added in an existing message, send to the first SGW.

Specifically, the processing unit 5 02, is additionally operable to be added to the operation instruction message in modification bearing request message.

Now, the processing unit 5 02 to the first SGW specifically for sending the modification bearing request message, wherein carrying the operation instruction message in the modification bearing request message.

Or, the processing unit 5 02 is additionally operable to that the operation instruction message can be added to establishment conversation request message.

Wherein, the first message includes：Change bearer messages.

Now, it is used in the processing unit 5 02 when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of operation instruction message being sent to the first S GW, the processing unit 5 02, includes for sending operation instruction message to the first S GW：Send to create in conversation request message, the establishment conversation request message to the-S GW and carry behaviour Make instruction message.

Or,

The processing unit 502, for when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, determining the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW that according to the first message, data channel is set up with the PGW.

Further, in the processing unit 502, for when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, the first message to include：2nd SGW is the Tunnel End Point Identifier TEID and internet protocol address for the user plane that UE carries distribution, and the 2nd SGW is the TEID and IP address for the chain of command that UE is distributed.The operation instruction message includes：TE I D and the I P addresses of the user plane of the PGW and TE I D and the I P addresses of chain of command.

It should be noted that, processing unit 502 sends operation instruction message to the 2nd SGW method, it can be that directly operation instruction message is sent to the 2nd SGW as a new information or operation instruction message is added in an existing message, send to the 2nd SGW.

Specifically, the processing unit 502, is additionally operable to that the operation instruction message can be added to establishment conversation request message.

Wherein, the first message includes：Change bearer messages.

Now, it is used in the processing unit 502 when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, the processing unit 502, includes for sending operation instruction message to the 2nd SGW：Send to create in conversation request message, the establishment conversation request message to the 2nd SGW and carry operation instruction message.

Further, the processing unit 502, is additionally operable to when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, Sent to the first SGW and delete conversation message, to cause the first SGW to delete the contextual information of the UE.

Wherein, it is described to delete the TEID and IP address that the first SGW is carried in conversation message for the UE chains of command distributed.

The receiving unit 501, is additionally operable to receive the deletion conversational response message that the first SGW is sent.

Further, the processing unit 502, is additionally operable to determine that service UE SGW changes.As, determine that the first SGW and the 3rd SGW is not same SGW.

Wherein, the 3rd SGW is the SGW for being used to service UE that first service node is determined.Specifically, in the processing unit 502, when determining that service UE SGW changes, when as determining that the 3rd SGW is not a SGW, the processing unit 502 just performs transmission operation instruction message to the first SGW, or the action for deleting conversation message is sent to the first SGW.

Further, the receiving unit 501, is additionally operable to receive the SGW change configured informations that first service node is sent.

The processing unit 502, configured information is changed specifically for the SGW received according to the receiving unit 501, it is determined that service UE SGW changes.As, the processing unit 502, changes configured information specifically for the SGW received according to the receiving unit 501, determines that the first SGW and the 3rd SGW is not same SGW.

The embodiments of the invention provide a kind of service node, after the Route Area of UE transmissions or tracing section updating request message is received, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message can be sent to the first SGW, to cause the first SGW to receive after operation instruction information, data channel is set up with PGW.Or, it may be determined that the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW to receive after operation instruction information, data channel is set up with PGW.So, UE is when returning to original SGSN or MME, UE former SGW can be made to continue as UE services, the first SGW is as set to continue as UE services, now data channel is established between UE the first SGW and PGW, UE data can be sent to PGW by this first SGW, while PGW can also be incited somebody to action by this first SGW Downlink data is sent to UE, so as to will ensure that UE is normally carried out business processing, improves Consumer's Experience.Or, other SGW are selected to be serviced for UE, as determine the 2nd SGW, and the data channel set up between the 2nd SGW and PGW, UE data are sent to PGW by this 2nd SGW, PGW can also be sent downlink data to UE by this 2nd SGW simultaneously, so as to will ensure that UE is normally carried out business processing, improve Consumer's Experience.

As shown in fig. 6, a kind of its gateway SGW provided by the embodiment of the present invention functional schematic.With reference to shown in Fig. 6, the SGW includes：

Receiving unit 601, the operation instruction message for receiving service node transmission.

Further, the first message includes：The SGW is the Tunnel End Point Identifier TEID and Internet protocol IP address for the user plane that user equipment (UE) carries distribution, and the SGW is TE I D and the I P addresses for the chain of command that UE is distributed.

Specifically, the receiving unit 601, specifically for receiving the modification bearing request message that service node is sent.

Wherein, operation instruction message is carried in the modification bearing request message.

Or, the first message includes：Change bearer messages.

The now receiving unit 601, specifically for receiving the establishment conversation request message that service node is sent.

Wherein, operation instruction message is carried in the establishment conversation request message.The operation instruction information is used to indicate that SGW sends modification bearer messages to packet data gateway PGW.

Further, the operation instruction information is：The chain of command TEID and IP address of the PGW.So, SGW can trigger SGW and further perform to PGW transmission first messages, and then the action for the data channel set up between PGW after chain of command TE I D and the I P addresses as the PGW of operation instruction message are received.Now, the SGW of protection of the embodiment of the present invention is the first SGW.

Or, the operation instruction includes：The TEID and IP address of the user plane of the PGW and the TEID and IP address of chain of command.Now, the SGW of the embodiment of the present invention is not One SGW, is the SGW serviced for UE that service node is newly selected.

Further, in the case where the SGW of the embodiment of the present invention is not the first SGW, the first message includes：Change bearer messages.

Processing unit 602, for the operation instruction message for being received according to the receiving unit 601, first message is sent to packet data gateway PGW.

Further, as shown in fig. 7, the SGW includes：Transmitting element 603.

Wherein, the receiving unit 601, is additionally operable to receive the deletion conversation message that the service node is sent.

The processing unit 602, is additionally operable to the TEID of the first SGW carried in the deletion conversation message according to receiving unit reception chain of command, deletes the UE of storage contextual information.

The transmitting element 603, conversational response message is deleted for being returned to the service node.

The embodiments of the invention provide a kind of SGW, receive after operation instruction message, first message is sent to PGW, to cause PGW to preserve TEID and IP address that SGW carries the user plane distributed as UE, SGW is the TEID and IP address for the chain of command that UE is distributed, so as to establish the data channel between SGW and PGW.So, UE is when returning to original SGSN or MME, data channel can will be set up between UE former SGW and PGW, UE data are sent to PGW by this former SGW, PGW can also be sent downlink data to UE by this former SGW simultaneously, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.

As shown in Fig. 8, a kind of structural representation of its service node provided by the embodiment of the present invention.With reference to shown in Fig. 8, the service node includes：Receiver 701, memory 702, and the processor 703 being connected respectively with receiver 701, memory 702. Wherein, batch processing code is stored in memory 702, processor 703 is used to call the program code in memory 702.Specifically,

Receiver 701, Route Area or tracing section updating request message for receiving user equipment (UE) transmission.

Processor 703, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the first message, data channel is set up with the PGW.

Further, in the processor 703, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the first message includes：First SGW is the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that UE carries distribution, and the first SGW is the TEID and IP address for the chain of command that UE is distributed.

Further, the processor 703 is used for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the operation instruction message is：The chain of command TE ID and IP address of the PGW.

It should be noted that processor sends operation instruction message to the first SGW method, It can be that directly operation instruction message is sent to the first SGW as a new information or operation instruction message is added in an existing message, send to the first SGW.

Specifically, the processor 7 03, is additionally operable to be added to the operation instruction message in modification bearing request message.

Now, the processor 7 03 to the first SGW specifically for sending the modification bearing request message.

Wherein, the operation instruction message is carried in the modification bearing request message.Or, the processor 703 is additionally operable to that the operation instruction message can be added to establishment conversation request message.

Wherein, the first message includes：Change bearer messages.

Now, it is used in the processor 7 03 when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of operation instruction message being sent to the first SGW, the processor 7 03, includes for sending operation instruction message to the first SGW：Send to create in conversation request message, the establishment conversation request message to the first SGW and carry operation instruction message.

Or,

The processor 7 03, for when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, determining the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW that according to the first message, data channel is set up with the PGW.

Wherein, the operation instruction message is used to indicate that SGW sends first message to the PGW.The first message is that the message of data channel is set up for SGW and the PGW.The first S GW are the gateway that service node is stored in UE contextual informations.

Further, in the processor 703, for when it is determined that UE the first S GW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, the first message to include：2nd SGW is the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that UE carries distribution, and the 2nd SGW is TE I D and the I P addresses for the chain of command that UE is distributed.The operation instruction message includes：Institute State TE I D and the I P addresses of PGW user plane and TE I D and the I P addresses of chain of command.It should be noted that, processor sends operation instruction message to the 2nd SGW method, it can be that directly operation instruction message is sent to the 2nd SGW as a new information or operation instruction message is added in an existing message, send to the 2nd SGW.

Specifically, the processor 703, is additionally operable to that the operation instruction message can be added to establishment conversation request message.

Wherein, the first message includes：Change bearer messages.

Now, it is used in the processor 703 when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, the processor 703 includes for sending operation instruction message to the 2nd SGW：Send to create in conversation request message, the establishment conversation request message to the 2nd SGW and carry operation instruction message.

Further, handled device 703, it is additionally operable to when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, sent to the first SGW and delete conversation message, to cause the first SGW to delete the contextual information of the UE.

The receiver 701, is additionally operable to receive the deletion conversational response message that the first SGW is sent.

Further, the processor 703, is additionally operable to determine that service UE SGW changes.As, determine that the first SGW and the 3rd SGW is not same SGW.

Wherein, the 3rd SGW is the SGW for being used to service UE that first service node is determined.Specifically, in the processor 703, when determining that service UE SGW changes, when as determining that the 3rd SGW is not a SGW, the processor 703 just performs transmission operation instruction message to the first SGW, or the action for deleting conversation message is sent to the first SGW.

Further, the receiver 701, is additionally operable to receive the SGW change configured informations that first service node is sent. The processor 7 03, configured information is changed specifically for the SGW received according to the receiver 7 01, it is determined that service UE SGW changes.As, the processing unit 5 02, changes configured information, it is not same S GW to determine the first SGW and the 3rd SGW specifically for the S GW received according to the receiving unit 5 01.

The embodiments of the invention provide a kind of service node, after the Route Area of UE transmissions or tracing section updating request message is received, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message can be sent to the first SGW, to cause the first SGW to receive after operation instruction information, data channel is set up with PGW.Or, it may be determined that the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd S GW to receive after operation instruction information, data channel is set up with PGW.So, UE is when returning to original SG SN or MME, UE former SGW can be made to continue as UE services, the first SGW is as set to continue as UE services, data channel now is established between UE the first S GW and PGW, UE data can be sent to PGW by this first SGW, while PGW can also be sent downlink data to UE by this first SGW, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.Or, other SGW are selected to be serviced for UE, as determine the 2nd SGW, and the data channel set up between the 2nd S GW and PGW, UE data are sent to PGW by this 2nd SGW, PGW can also be sent downlink data to UE by this 2nd SGW simultaneously, so as to will ensure that UE is normally carried out business processing, improve Consumer's Experience.

As shown in figure 9, a kind of its gateway SGW provided by the embodiment of the present invention structural representation.With reference to shown in Fig. 9, the SGW includes：Receiver 8 01, memory 8 02, transmitter 803 and the processor 8 04 being connected respectively with receiver 8 01, memory 8 02 and transmitter 8 03.

Wherein, batch processing code is stored in memory 8 02, processor 8 04 is used to call the program code in memory 8 02.Specifically,

Receiver 8 01, the operation instruction message for receiving service node transmission.

Wherein, the operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages.The first message is that the message of data channel is set up for the SGW and the PGW. Further, the first message includes：The SGW is the Tunnel End Point Identifier TEID and Internet protocol IP address for the user plane that user equipment (UE) carries distribution, and the SGW is TE I D and the I P addresses for the chain of command that UE is distributed.

Specifically, the receiver 801, the modification ^ sent specifically for receiving service node carries request message.

Or, the first message includes：Change bearer messages.

The now receiver 801, specifically for receiving the establishment conversation request message that service node is sent.

Or, the operation instruction includes：The TEID and IP address of the user plane of the PGW and the TEID and IP address of chain of command.Now, the SGW of the embodiment of the present invention is not the first SGW, is the SGW serviced for UE that service node is newly selected.

Processor 804, for the operation instruction message for being received according to the receiver 801, first message is sent to packet data gateway PGW.

Further, the receiver 801, is additionally operable to receive the deletion conversation message that the service node is sent. Wherein, it is described to delete the TEID and IP address that the first SGW is carried in conversation message for the UE chains of command distributed.

The processor 804, is additionally operable to the TEID of the first SGW carried in the deletion conversation message according to receiving unit reception chain of command, deletes the UE of storage contextual information.

The transmitter 803, conversational response message is deleted for being returned to the service node.The embodiments of the invention provide a kind of SGW, receive after operation instruction message, first message is sent to PGW, to cause PGW to preserve TEID and IP address that SGW carries the user plane distributed as UE, SGW is the TEID and IP address for the chain of command that UE is distributed, so as to establish the data channel between SGW and PGW.So, UE is when returning to original SGSN or MME, data channel can will be set up between UE former SGW and PGW, UE data are sent to PGW by this former SGW, PGW can also be sent downlink data to UE by this former SGW simultaneously, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.

The embodiments of the invention provide a kind of data channel set up system, as shown in Figure 10, including：Service node 1001, gateway SGW1002 and packet data gateway PGW1003.Wherein, the service node described in described above-described embodiment of service node 1001.The SGW1002 is the SGW described in above-described embodiment.

The embodiments of the invention provide a kind of method of data channel foundation, apparatus and system, service node is after the Route Area of UE transmissions or tracing section updating request message is received, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message can be sent to the first SGW, to cause the first SGW to receive after operation instruction information, data channel is set up with PGW.Or, it may be determined that the 2nd SGW;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW to receive after operation instruction information, data channel is set up with PGW.So, UE is when returning to original SGSN or MME, UE former SGW can be made to continue as UE services, the first SGW is as set to continue as UE services, data channel now is established between UE the first SGW and PGW, UE data can be sent to PGW by this first SGW, while PGW can also be sent downlink data to UE by this first SGW, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.Or, select other SGW to be UE is serviced, as determine the 2nd SGW, and the data channel set up between the 2nd SGW and PGW, UE data are sent to PGW by this 2nd SGW, PGW can also be sent downlink data to UE by this 2nd SGW simultaneously, so as to ensure that UE is normally carried out business processing, Consumer's Experience is improved.

In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be realized by another way.For example, device embodiment described above is only schematical, for example, the division of the unit, it is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.Another, it, by some interfaces, the INDIRECT COUPLING or communication connection of device or unit, can be electrical, machinery or other forms that shown or discussed coupling or direct-coupling or communication connection each other, which can be,.

The unit illustrated as separating component can be or may not be physically separate, the part shown as unit can be or may not be physical location, a place can be located at, or can also be distributed on multiple NEs.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.

In addition, each functional unit in each of the invention embodiment can be integrated in a processing unit or the independent physics of unit includes, can also two or more units it is integrated in a unit.Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.

The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform the part steps of each embodiment methods described of the invention.And foregoing storage medium includes：U disks, mobile hard disk, read-only storage (Read-Only Memory, abbreviation Should）, random access memory（Random Acces s Memory, abbreviation RAM), magnetic disc or CD etc. are various can be with the medium of store program codes.

Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, Rather than its limitations；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

Claims

1st, a kind of method that data channel is set up, it is characterised in that including：

Receive Route Area or tracing section updating request message that user equipment (UE) is sent；When it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW；Or,

When it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, the 2nd SGW is determined;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW according to the operation instruction Messages Message, data channel is set up with the PGW, wherein, the operation instruction message is to indicate that SGW sends the message of first message to the PGW；The first message is the message that SGW and the PGW set up data channel.

2nd, the method according to claim 1, it is characterized in that, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the first message includes：First SGW is the Tunnel End Point Identifier TEID and internet protocol address for the user plane that UE carries distribution, and the first SGW is the TEID and IP address for the chain of command that UE is distributed；

When it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, the first message includes the Tunnel End Point Identifier TEID and internet protocol address that the 2nd SGW is the user plane that UE carries distribution, and the 2nd SGW is the TEID and IP address for the chain of command that UE is distributed；The operation instruction message includes：The TEID and IP address of the user plane of the PGW and the TEID and IP address of chain of command.

3rd, method according to claim 1 or 2, it is characterised in that

The operation instruction message is added in modification bearing request message；

It is described to include to the first SGW transmissions operation instruction message：

The modification bearing request message is sent to the first SGW, wherein the modification carrying The operation instruction message is carried in request message.

4th, the method according to any one of claim 1-3, it is characterised in that

Before the transmission operation instruction message to the first SGW, in addition to：

It is determined that service UE SGW changes.

5th, the method according to claim 1 or 2, it is characterised in that when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, in addition to：

When it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, is sent to the first SGW and delete conversation message, to cause the first SGW to delete the contextual information of the UE；TE I D and I P addresses of the first SGW for the UE chains of command distributed is carried in the deletion conversation message；

Receive the deletion conversational response message that the first SGW is sent.

6th, the method according to claim 5, it is characterised in that before the transmission deletion conversation message to the first SGW, in addition to：

It is determined that service UE SGW changes.

7th, the method according to claim 5 or 6, it is characterised in that

It is described determine service UE SGW change including：

Receive the SGW change configured informations that first service node is sent；

Configured information is changed according to the SGW, it is determined that service UE SGW changes.

8th, the method according to any one of claim 1 or 2 or 5-7, it is characterised in that the operation instruction message is added to and creates conversation request message；The first message includes：Change bearer messages；

When it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, it is described to include to the first SGW transmissions operation instruction message in the case of sending operation instruction message to the first SGW：Send to create in conversation request message, the establishment conversation request message to the first S G W and carry operation instruction message；

It is described to described second in the case of determining the 2nd SGW when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information SGW, which sends operation instruction message, to be included：

Send to create in conversation request message, the establishment conversation request message to the 2nd S G W and carry operation instruction message.

9th, the method according to claim any one of 1-8, it is characterized in that, when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the operation instruction message is：Chain of command TEID and the I P address of the PGW.

10th, a kind of method that data channel is set up, it is characterised in that including：

Receive the operation instruction message that service node is sent；Wherein, the operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages；The first message is that the message of data channel is set up for the SGW and the PGW；

According to the operation instruction message, first message is sent to packet data gateway PGW.

11st, method according to claim 10, its feature exists, and the first message includes：The SGW is the Tunnel End Point Identifier TEID and internet protocol address for the user plane that user equipment (UE) carries distribution, and the SGW is the TEID and IP address for the chain of command that UE is distributed.

12nd, the method according to claim 10 or 11, it is characterised in that

The operation instruction message for receiving service node transmission includes：

The modification bearing request message that service node is sent is received, wherein, carry operation instruction message in the modification bearing request message.

13rd, the method according to claim any one of 10-12, it is characterised in that the operation instruction information is：The chain of command TEID and IP address of the PGW.

14th, the method according to claim 11, it is characterised in that the operation instruction includes：The TEID and IP address of the user plane of the PGW and the TEID and IP address of chain of command.

15th, the method according to claim 10 or 11 or 14, it is characterised in that before the operation instruction message that the reception service node is sent, in addition to：

Receive the deletion conversation message that the service node is sent；Taken in the deletion conversation message With TE I D and the I P addresses that the first SGW is the chain of command that UE is distributed；

According to the TE I D of the first SGW carried in the deletion conversation message chain of command, the UE of storage contextual information is deleted；

Returned to the service node and delete conversational response message.

16, the method according to claim 10 or 11 or 14 or 15, it is characterised in that the first message includes：Change bearer messages；

The operation instruction message for receiving service node transmission includes：

Receive the establishment conversation request message that service node is sent；Operation instruction message is carried in the establishment conversation request message；The operation instruction information is used to indicate that SGW sends modification bearer messages to packet data gateway PGW.

17, a kind of service node, it is characterised in that including：

Receiving unit, Route Area or tracing section updating request message for receiving user equipment (UE) transmission；

Processing unit, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW；Or,

When it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, the 2nd SGW is determined;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW that according to the operation instruction message, data channel is set up with the PGW.

18, the service node according to claim 17, it is characterised in that

In the processing unit, for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the first message includes：First SGW is the Tunnel End Point Identifier TE I D and Internet protocol I P addresses for the user plane that UE carries distribution, and the first SGW is TE I D and the I P addresses for the chain of command that UE is distributed；In the processing unit, for when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, determining the 2nd SGW's In the case of, the first message includes the Tunnel End Point Identifier TEID and internet protocol address that the 2nd SGW is the user plane that UE carries distribution, and the 2nd SGW is TE I D and the I P addresses for the chain of command that UE is distributed；The operation instruction message includes：The TEID and IP address of the user plane of the PGW and the TEID and IP address of chain of command.

19th, the service node according to claim 17 or 18, it is characterised in that the processing unit, is additionally operable to the operation instruction message being added in modification bearing request message；

The processing unit to the first SGW specifically for sending the modification bearing request message, wherein carrying the operation instruction message in the modification bearing request message.

20th, the service node according to claim 17 or 18, it is characterized in that, the processing unit, it is additionally operable to when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, sent to the first SGW and delete conversation message, to cause the first SGW to delete the contextual information of the UE；TEID and I P addresses of the first SGW for the UE chains of command distributed is carried in the deletion conversation message；

The receiving unit, is additionally operable to receive the deletion conversational response message that the first SGW is sent.

21st, the service node according to claim any one of 17-20, it is characterised in that the processing unit, is additionally operable to determine that service UE SGW changes.

22nd, service node according to claim 21, it is characterised in that

The receiving unit, is additionally operable to receive the SGW change configured informations that first service node is sent；

The processing unit, configured information is changed specifically for the SGW received according to the receiving unit, it is determined that service UE SGW changes.

23rd, the service node according to claim 17 or 18 or 20, it is characterised in that the processing unit, is additionally operable to the operation instruction message being added to establishment conversation request message；The first message includes：Change bearer messages；

It is used in the processing unit it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information When, in the case of sending operation instruction message to the first SGW, the processing unit includes for sending operation instruction message to the first SGW：Send to create in conversation request message, the establishment conversation request message to the first SGW and carry operation instruction message；

It is used in the processing unit when it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of determining the 2nd SGW, the processing unit, includes for sending operation instruction message to the 2nd SGW：Send to create in conversation request message, the establishment conversation request message to the 2nd S G W and carry operation instruction message.

24th, the service node according to claim any one of 17-23, it is characterized in that, the processing unit is used for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, in the case of sending operation instruction message to the first SGW, the operation instruction message is：The chain of command TEID and IP address of the PGW.

25th, a kind of gateway SGW, it is characterised in that including：

Receiving unit, the operation instruction message for receiving service node transmission；Wherein, the operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages；The first message is that the message of data channel is set up for the SGW and the PGW；Processing unit, for the operation instruction message received according to the receiving unit, first message is sent to packet data gateway PGW.

26th, the SGW according to claim 25, it is characterised in that the first message includes：The SGW is the Tunnel End Point Identifier TEID and internet protocol address for the user plane that user equipment (UE) carries distribution, and the SGW is the TEID and IP address for the chain of command that UE is distributed.

27th, the SGW according to claim 25 or 26, it is characterised in that

The receiving unit, specifically for receiving the modification bearing request message that service node is sent, wherein, carry operation instruction message in the modification bearing request message.

28th, the SGW according to claim any one of 25-27, it is characterised in that the operation instruction information is：The chain of command TEID and IP address of the PGW.

29th, SGW according to claim 25, it is characterised in that The operation instruction includes：TE I D and the I P addresses of the user plane of the PGW and TE I D and the I P addresses of chain of command.

30th, the SGW according to claim 25 or 26 or 29, it is characterised in that also include：Transmitting element；

The receiving unit, is additionally operable to receive the deletion conversation message that the service node is sent；TE I D and I P addresses of the first SGW for the UE chains of command distributed is carried in the deletion conversation message；

The processing unit, is additionally operable to the TE I D of the first SGW carried in the deletion conversation message according to receiving unit reception chain of command, deletes the UE of storage contextual information；

The transmitting element, conversational response message is deleted for being returned to the service node.

31st, the SGW according to claim 25 or 26 or 29 or 30, it is characterised in that the first message includes：Change bearer messages；

The receiving unit, specifically for receiving the establishment conversation request message that service node is sent；Operation instruction message is carried in the establishment conversation request message；The operation instruction information is used to indicate that SGW sends modification bearer messages to packet data gateway PGW.

32nd, a kind of service node, it is characterised in that including：

Receiver, for Route Area or the tracing section updating request message for receiving user equipment (UE) transmission；

Processor, for for when it is determined that UE first service gateway SGW and packet data gateway PGW are labeled as invalid described in the contextual information presence of the UE and contextual information, operation instruction message is sent to the first SGW, to cause the first SGW that according to the operation instruction message, data channel is set up with the PGW；Or,

When it is determined that UE the first SGW and PGW is labeled as invalid described in the contextual information presence of the UE and contextual information, the 2nd SGW is determined;Operation instruction message is sent to the 2nd SGW, to cause the 2nd SGW that according to the operation instruction message, data channel is set up with the PGW.

33, a kind of gateway SGW, it is characterised in that including：

Receiver, for the operation instruction message for receiving service node transmission；Wherein, institute Stating operation instruction message is used for indicating service gateway SGW to packet data gateway PGW transmission first messages；The first message is that the message of data channel is set up for the SGW and the PGW；Processor, for the operation instruction message for being received according to the receiver, first message is sent to packet data gateway PGW.

34th, the system that a kind of data channel is set up, it is characterised in that including：Service node, gateway SGW and packet data gateway PGW;Wherein,

The service node is the service node described in any one of claim 1 7- 24；Or, the service node wants the service node described in 32 for right；

The SGW is the SGW described in any one of claim 25- 31;Or, the SGW is the SGW described in claim 33.