CN105308936A

CN105308936A - A method, network system, and sdn controller for moving a data stream

Info

Publication number: CN105308936A
Application number: CN201480030146.9A
Authority: CN
Inventors: 薛开平; 殷静; 倪丹; 魏鑫鹏
Original assignee: University of Science and Technology of China USTC; Huawei Technologies Co Ltd
Current assignee: University of Science and Technology of China USTC; Huawei Technologies Co Ltd
Priority date: 2014-05-23
Filing date: 2014-05-23
Publication date: 2016-02-03
Also published as: WO2015176318A1

Abstract

Provided are a method, network system, and SDN controller for moving a data stream, the SDN controller comprising: a first determining unit determines that it is necessary to move a first data stream from a first interface of an MN to a second interface; the first interface corresponds to a first path of a first data stream; the second interface corresponds to a second path of the first data stream; it is determined whether the MAG contained in the second path is the same device as the MAG contained in the first path; according to the determined result, a second determining unit determines in the network element devices of a second path a network element device requiring reception of a flow table entry adjustment message; a first transmission unit sends a flow table entry adjustment message to the determined network element device, said flow table entry adjustment message being used for instructing the movement of the first data stream from the first path to the second path for transmission. The embodiments of the present invention do not require negotiation between network element devices and save costs in network construction.

Description

A method, network system, and sdn controller for moving a data stream

A kind of data flow is moved one by one method, network system and SDN controllers

Technical field

The present invention relates to method, network system and the SDN controllers of communication technical field, more particularly to a kind of movement of data flow.

Background technology

Next generation optical transmission network version 6 (Internet Protocol Version 6, IPv6) agreement extends two core functional entities, respectively local mobile anchor in Internet（LMA, Local Mobility Anchor) and Mobile Access Gateway（MAG, Mobile Access Gateway).Wherein, MAG is located at mobile node（MN, Mobile Node) institute's grappling link on, be responsible for detection MN movement；LMA is the topology grappling fixed point of MN all data flows, is responsible for distributing mailing address prefix by each data flow of MN interfaces.Proxy mobile IPv 6 agreement supports MN is accessed simultaneously by multiple interfaces to there may be a plurality of different data flow on multiple network, each interface, when having new interface to access or a certain interface occurs congestion, all can the movement of trigger data stream.

In the prior art, MN multiple interfaces can be anchored to same LMA by the different MAG of different network insertions, and the MAG that LMA is accessed to MN total interface and these interfaces is managed collectively.Data flow locomotive function can be in units of data flow, switching is realized on different interfaces, in data flow moving process, the Signalling exchange for carrying out complexity is needed to realize the movement of data flow between LMA and MAG, so as to when there is frequently data flow movement, LMA and different MAG need more frequent complicated Signalling exchange, and network element device LMA and MAG may be only available for proxy mobile IPv 6 agreement, if agreement is changed, network element device will also be changed accordingly, and then cause in networking huge waste.

The content of the invention

The embodiments of the invention provide method, network system and the SDN controllers of a kind of data flow movement, solve in proxy mobile IPv 6 agreement, network element device has the problem of substantial amounts of signaling negotiation and interaction, and solves by the change of agreement causes network element device to change the problem of being wasted in brought networking.

The first aspect of the embodiment of the present invention provides a kind of self-defined network SDN controllers of software, including：First determining unit, for determining to need to be moved to the first data flow into the second interface of the MN from the first interface of mobile node MN, the first path of the first interface correspondence first data flow, second path of the second interface correspondence first data flow, and judge whether the Mobile Access Gateway MAG included in second path is same equipment with the MAG included in the first path； --the second determining unit, determines in the network element device in second path to need to receive the network element device that flow table item adjusts message for the judged result according to first determining unit；

First transmitting element, the network element device that flow table item adjustment message is received the need for for being determined to second determining unit sends the flow table item adjustment message, and the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

With reference to the first aspect of the embodiment of the present invention, in the first embodiment of the first aspect of the embodiment of the present invention, the flow table item adjustment message is additionally operable to indicate the flow table item that the network element device is adjusted according to the flow table item in the content adjustment network element device of message.

With reference to the first embodiment of the first aspect of the embodiment of the present invention, in second of embodiment of the first aspect of the embodiment of the present invention, second determining unit specifically for, it is that the MAG that the MAG that the first path is included is included with second path is same equipment in the judged result, when the same equipment is a MAG, it is to need to receive the network element device that flow table item adjusts message to determine the first MAG；

First transmitting element specifically for, the first flow table item adjustment message is sent to the first MAG, the first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of first flow table item adjustment message；

The content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface.

With reference to the first embodiment of the first aspect of the embodiment of the present invention, in the third embodiment of the first aspect of the embodiment of the present invention, second determining unit specifically for, the MAG included in the MAG and second path included during the judged result is the first path is not same equipment, the first MAG is included in the first path, when including two MAG in second path, it is to need to receive the network element device that the flow table item adjusts message to determine local mobility anchor fixed point LMA and the 2nd MAG；

First transmitting element includes：

First transmission sub-unit, for sending the second flow table item adjustment message to the 2nd MAG, the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to second flow table item increases by the second flow table item；

Second transmission sub-unit, for sending the 3rd flow table item adjustment message to the LMA, the 3rd flow table item adjustment message is used to indicating that the LMA to adjust the content of message by institute according to the 3rd flow table item --states the flow table item in LMA and is revised as the 3rd flow table item；

The content of the second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of the second flow table item adjustment message also includes：3rd matching preceding paragraph：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface；

The content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

With reference to the third embodiment of the first aspect of the embodiment of the present invention, in the 4th kind of embodiment of the first aspect of the embodiment of the present invention, first determining unit is additionally operable to, before it is determined that needing the first data flow being moved to the second interface of the MN from the first interface of mobile node MN, determine that the 2nd MAG described in the second path and LMA does not set up tunnel；

The SDN controllers also include：

Second transmitting element, for sending the first tunnel building message to the LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that the LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG；And

3rd transmitting element, for sending the second tunnel building message to the 2nd MAG, the second tunnel building message is used for the tunnel interface for indicating the 2nd MAG sides in the tunnel that the 2nd MAG is set up between the LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG.

With reference to the third embodiment or the 4th kind of embodiment of first aspect of the first aspect of the embodiment of the present invention, in the 5th kind of embodiment of the first aspect of the embodiment of the present invention, the SDN controllers also include：

3rd determining unit, for determining that the LMA and the 2nd MAG has adjusted flow table item；Encapsulation unit, for the mailing address prefix of first data flow to be encapsulated in router advertisement RA message；

4th transmitting element, for the RA message to be sent into the MN by the 2nd MAG.With reference to the 4th kind of reality of the third embodiment of the first aspect of the embodiment of the present invention, or first aspect --applies mode, or first aspect the 5th kind of embodiment, in the 6th kind of embodiment of the first aspect of the embodiment of the present invention, first determining unit includes：

Obtain subelement, the load information for obtaining corresponding first MAG of the first interface；First determination subelement, for determining that the load of the first MAG is more than or equal to the preset wealthy value of load according to the load information；

The acquisition subelement is additionally operable to, and obtains the corresponding MAG of other interfaces of MN load information；

First determining unit also includes：

Select subelement, the corresponding MAG of other interfaces load information and the position of the MN for being got according to the acquisition subelement are that the MN selects the 2nd MAG from the corresponding MAG of other described interfaces, and the 2nd MAG is corresponding with the second interface.

With reference to second of embodiment of the first aspect of the embodiment of the present invention, in the 7th kind of embodiment of the first aspect of the embodiment of the present invention, first determining unit includes：

Second determination subelement, for determining that the second interface is to have turned on state；

First receiving subelement, for receiving the first bearer messages that the first MAG is sent, first bearer messages include the identification information of the second interface；

3rd determination subelement, for determining the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to first bearer messages.

With reference to the third embodiment of the first aspect of the embodiment of the present invention, in the 8th kind of embodiment of the first aspect of the embodiment of the present invention, first determining unit includes：

4th determination subelement, for determining that the second interface is to have turned on state；

Second receiving subelement, for receiving the second bearer messages that the 2nd MAG is sent, second bearer messages include the identification information of the second interface；

5th determination subelement, for determining the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to second bearer messages.

With reference to the third embodiment of the first aspect of the embodiment of the present invention, in the 9th kind of embodiment of the first aspect of the embodiment of the present invention, first determining unit includes：6th determination subelement, for determining that the MN opens the second interface do not opened；

3rd receiving subelement, for receiving the L2 layer attach requests for including the MN in the 3rd bearer messages, the 3rd bearer messages from the 2nd MAG； --the seven determination subelement, for being determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 3rd bearer messages；

Or,

4th receiving subelement, the L2 layer attach requests of the MN are included for when the MN has more than two interfaces, being received from the corresponding MAG of an interface of the MN in the 4th bearer messages, the 4th bearer messages；

8th determination subelement, for being determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 4th bearer messages.

With reference to second of embodiment of the first aspect of the embodiment of the present invention, in the tenth kind of embodiment of the first aspect of the embodiment of the present invention, first determining unit includes：

9th determination subelement, for determining that the MN opens the second interface do not opened；5th receiving subelement, for receiving the 5th bearer messages from the first MAG；

Tenth determination subelement, for being determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 5th bearer messages；

The L2 layer attach requests of the MN are included in 5th bearer messages, the L2 layers attach request of the MN is used for MN requests and is linked into the first MAG by the second interface.

Second aspect of the embodiment of the present invention provides a kind of network system, and the system includes：The self-defined network SDN controllers of mobile node MN, software and at least one Mobile Access Gateway MAG;

The SDN controllers, for determining to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN, the first path of the first interface correspondence first data flow, second path of the second interface correspondence first data flow, and judge whether the MAG included in second path is same equipment with the MAG included in the first path；

The SDN controllers, are additionally operable to be determined to need to receive the network element device that the flow table item sent by the SDN controllers adjusts message in the network element device in second path according to judged result；

The SDN controllers, the network element device for being additionally operable to receive flow table item adjustment message the need for the determination sends the flow table item adjustment message, and the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

With reference to the second aspect of the embodiment of the present invention, in the first embodiment of the second aspect of the embodiment of the present invention, the flow table item adjustment message is additionally operable to indicate the flow table item that the network element device is adjusted according to the flow table item in the content adjustment network element device of message. --combines the first embodiment of the second aspect of the embodiment of the present invention, and in second of embodiment of the second aspect of the embodiment of the present invention, the first MAG is included at least one described MAG;

The SDN controllers, specifically for being that the MAG that the MAG that the first path is included is included with second path is same equipment in the judged result, when the same equipment is a MAG, the first MAG is determined to need to receive the network element device that flow table item adjusts message is sent by the SDN controllers；

The SDN controllers, specifically for sending the first flow table item adjustment message to the first MAG, the first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of first flow table item adjustment message, and the content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface.

With reference to the first embodiment of the second aspect of the embodiment of the present invention, in the third embodiment of the second aspect of the embodiment of the present invention, the system also includes：Local mobility anchor, which is pinpointed, includes the first MAG and the 2nd MAG in LMA, at least one described MAG;

The SDN controllers, specifically for being included in the judged result first path

MAG is not same equipment with the MAG included in second path, the first MAG is included in the first path, when including two MAG in second path, it is to need to receive the network element device that the flow table item adjusts message to determine the LMA and the 2nd MAG；

The SDN controllers, specifically for sending the second flow table item adjustment message to the 2nd MAG and sending the 3rd flow table item adjustment message to the LMA, the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to second flow table item increases by the second flow table item；

The SDN controllers, it is additionally operable to send the 3rd flow table item adjustment message to the LMA, the 3rd flow table item adjustment message is used to indicate that the flow table item in the LMA is revised as the 3rd flow table item by the LMA according to the content of the 3rd flow table item adjustment message；

The content of the second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of the second flow table item adjustment message also includes：3rd occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface；

The content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is first The mailing address prefix of data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

With reference to the third embodiment of the second aspect of the embodiment of the present invention, in the 4th kind of embodiment of the second aspect of the embodiment of the present invention, the SDN controllers, are additionally operable to determine that the 2nd MAG described in the second path and LMA does not set up tunnel before it is determined that needing first data flow being moved to the second interface of the MN from the first interface of the MN；

The SDN controllers, it is additionally operable to send the first tunnel building message to the LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that the LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG；

The SDN controllers, it is additionally operable to send the second tunnel building message to the 2nd MAG, the second tunnel building message is used for the tunnel interface for indicating the 2nd MAG sides in the tunnel that the 2nd MAG is set up between the LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG.

With reference to the third embodiment of the second aspect of the embodiment of the present invention, or the 4th kind of embodiment of second aspect, in the 5th kind of embodiment of the second aspect of the embodiment of the present invention, the SDN controllers, it is additionally operable to after the flow table item adjustment message is sent to the network element device of determination, determine that the LMA and the 2nd MAG has adjusted flow table item, and the mailing address prefix of first data flow is encapsulated in router advertisement RA message, the RA message is sent to the MN by the 2nd MAG.

With reference to the third embodiment of the second aspect of the embodiment of the present invention, or the 4th kind of embodiment of second aspect, or the 5th kind of embodiment of second aspect, in the 6th kind of embodiment of the second aspect of the embodiment of the present invention, the SDN controllers, it is additionally operable to obtain corresponding first MAG of first interface load information, the load for determining the first MAG according to the load information is more than or equal to the preset wealthy value of load, obtain the corresponding MAG of other interfaces of MN load information, and be that the MN selects the 2nd MAG from the corresponding MAG of other described interfaces according to the acquired corresponding MAG of other interfaces load information and the position of the MN, 2nd MAG is corresponding with the second interface.

With reference to second of embodiment of the second aspect of the embodiment of the present invention, in the 7th kind of embodiment of the second aspect of the embodiment of the present invention, --described SDN controllers, are additionally operable to determine the second interface to have turned on state；

The SDN controllers, it is additionally operable to receive the first bearer messages that the first MAG is sent, first bearer messages include the identification information of the second interface, and the second interface for needing to be moved to first data flow into the MN from the first interface of the MN is determined according to first bearer messages.

With reference to the third embodiment of the second aspect of the embodiment of the present invention, in the 8th kind of embodiment of the second aspect of the embodiment of the present invention,

The SDN controllers, are additionally operable to determine the second interface to have turned on state；

The SDN controllers, it is additionally operable to receive the second bearer messages that the 2nd MAG is sent, second bearer messages include the identification information of the second interface,, the second interface for needing to be moved to first data flow into the MN from the first interface of the MN is determined according to second bearer messages.

With reference to the third embodiment of the second aspect of the embodiment of the present invention, in the 9th kind of embodiment of the second aspect of the embodiment of the present invention,

The SDN controllers, are additionally operable to determine that the MN opens the second interface do not opened；The SDN controllers, it is additionally operable to receive the 3rd bearer messages from the 2nd MAG, the L2 layer attach requests of the MN are included in 3rd bearer messages, and need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 3rd bearer messages determination；Or when the MN has more than two interfaces, the SDN controllers are additionally operable to, the 4th bearer messages are received from the corresponding MAG of an interface of the MN, the L2 layer attach requests of the MN are included in 4th bearer messages, the SDN controllers determine to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 4th bearer messages.

With reference to second of embodiment of the second aspect of the embodiment of the present invention, in the tenth kind of embodiment of the second aspect of the embodiment of the present invention,

The SDN controllers, are additionally operable to determine that the MN opens the second interface do not opened；The SDN controllers, are additionally operable to receive the 5th bearer messages from the first MAG, and need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 5th bearer messages determination；

The third aspect of the embodiment of the present invention provides the self-defined network SDN controllers of another software, including：Processor, for determining to need the first data flow being moved to institute from the first interface of mobile node MN --states MN second interface, the first path of the first interface correspondence first data flow, the second path of the second interface correspondence first data flow；Whether judge the Mobile Access Gateway MAG included in second path is same equipment with the MAG included in the first path；Determined in the network element device in second path to need to receive the network element device that flow table item adjusts message according to the judged result；Transmitter, the network element device that flow table item adjustment message is received the need for for being determined to the processor sends the flow table item adjustment message, and the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

With reference to the third aspect of the embodiment of the present invention, in the first embodiment of the third aspect of the embodiment of the present invention, the flow table item adjustment message is additionally operable to indicate the flow table item that the network element device is adjusted according to the flow table item in the content adjustment network element device of message.

Fourth aspect of the embodiment of the present invention provides a kind of method that data flow is moved, and methods described includes：

SDN controllers determine to need to be moved to the first data flow into the second interface of the MN from the first interface of mobile node MN, the first path of the first interface correspondence first data flow, second path of the second interface correspondence first data flow, and judge whether the Mobile Access Gateway MAG included in second path is same equipment with the MAG included in the first path；

The SDN controllers determine that the flow table item for needing reception to be sent by the SDN controllers adjusts the network element device of message according to judged result in the network element device in second path；

The SDN controllers send the flow table item to the network element device that flow table item adjustment message is received the need for the determination and adjust message, and the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

With reference to the fourth aspect of the embodiment of the present invention, in the first embodiment of the fourth aspect of the embodiment of the present invention, the flow table item adjustment message is additionally operable to indicate the flow table item that the network element device is adjusted according to the flow table item in the content adjustment network element device of message.

With reference to the first embodiment of the fourth aspect of the embodiment of the present invention, in second of embodiment of the fourth aspect of the embodiment of the present invention, the SDN controllers determine that the network element device for needing reception to send flow table item adjustment message by the SDN controllers is specifically included according to judged result in the network element device in second path：

If the MAG that the MAG that the judged result, which is the first path, to be included is included with second path is same equipment, the same equipment is the first MAG, and the SDN controllers determine the first MAG and send the network element device that flow table item adjusts message by the SDN controllers to need to receive； --described SDN controllers send the flow table item adjustment message to the network element device that flow table item adjustment message is received the need for the determination：

The SDN controllers send the first flow table item adjustment message to the first MAG, and the first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of first flow table item adjustment message；

With reference to the first embodiment of the fourth aspect of the embodiment of the present invention, in the third embodiment of the fourth aspect of the embodiment of the present invention, the SDN controllers determine that the network element device for needing reception to send flow table item adjustment message by the SDN controllers is specifically included according to judged result in the network element device in second path：

If the judged result is the MAG included in the first path and the MAG included in second path is not same equipment, the first MAG is included in the first path, the 2nd MAG is included in second path, then the SDN controllers determine that local mobility anchor fixed point LMA and the 2nd MAG is to need to receive the network element device that the flow table item adjusts message；

The SDN controllers need the network element device transmission flow table item adjustment message for receiving flow table item adjustment message to specifically include to the determination：

The SDN controllers send the second flow table item adjustment message to the 2nd MAG, and the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to second flow table item increases by the second flow table item；And

The SDN controllers send the 3rd flow table item adjustment message to the LMA, and the 3rd flow table item adjustment message is used to indicate that the flow table item in the LMA is revised as the 3rd flow table item by the LMA according to the content of the 3rd flow table item adjustment message；

The content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is connect from the MAG tunnels of LMA- the 2nd --mouth is forwarded.

With reference to the third embodiment of the fourth aspect of the embodiment of the present invention, in the 4th kind of embodiment of the fourth aspect of the embodiment of the present invention, before the SDN controllers determine to need the first data flow being moved to the second interface of the MN from the first interface of the MN, methods described also includes：

The SDN controllers determine that the 2nd MAG and LMA does not set up tunnel；The SDN controllers send the first tunnel building message to the LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that the LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG；

The SDN controllers send the second tunnel building message to the 2nd MAG, the second tunnel building message is used for the tunnel interface for indicating the 2nd MAG sides in the tunnel that the 2nd MAG is set up between the LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG.

With reference to the third embodiment of the fourth aspect of the embodiment of the present invention, or the 4th kind of embodiment of fourth aspect, in the 5th kind of embodiment of the fourth aspect of the embodiment of the present invention, the SDN controllers are sent after the flow table item adjusts message to the network element device of determination also to be included：

The SDN controllers determine that the LMA and the 2nd MAG has adjusted flow table item；The mailing address prefix of first data flow is encapsulated in router advertisement RA message by the SDN controllers, and the RA message is sent into the MN by the 2nd MAG.

With reference to the third embodiment of the fourth aspect of the embodiment of the present invention, or the 4th kind of embodiment of fourth aspect, or the 5th kind of embodiment of fourth aspect, in the 6th kind of embodiment of the fourth aspect of the embodiment of the present invention, the SDN controllers determine to need the second interface that first data flow is moved into the MN from the first interface of the MN to specifically include：

The SDN controllers obtain corresponding first MAG of first interface load information；The SDN controllers determine that the load of the first MAG is more than or equal to the preset wealthy value of load according to the load information；

The SDN controllers obtain the corresponding MAG of other interfaces of MN load information, and be that the MN selects the 2nd MAG from the corresponding MAG of other described interfaces according to the acquired corresponding MAG of other interfaces load information and the position of the MN, the 2nd MAG is corresponding with the second interface. --combines second of embodiment of the fourth aspect of the embodiment of the present invention, in the 7th kind of embodiment of the fourth aspect of the embodiment of the present invention, the SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include：

The SDN controllers determine the second interface to have turned on state；

The SDN controllers receive the first bearer messages that the first MAG is sent, and first bearer messages include the identification information of the second interface；

The SDN controllers determine the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to first bearer messages.

With reference to the third embodiment of the fourth aspect of the embodiment of the present invention, in the 8th kind of embodiment of the fourth aspect of the embodiment of the present invention, the SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include：

The SDN controllers determine the second interface to have turned on state；

The SDN controllers receive the second bearer messages that the 2nd MAG is sent, and second bearer messages include the identification information of the second interface；

The SDN controllers determine the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to second bearer messages.

With reference to the third embodiment of the fourth aspect of the embodiment of the present invention, in the 9th kind of embodiment of the fourth aspect of the embodiment of the present invention, the SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include：

The SDN controllers determine that the MN opens the second interface do not opened；The SDN controllers receive the 3rd bearer messages from the 2nd MAG, the L2 layer attach requests of the MN are included in 3rd bearer messages, and need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 3rd bearer messages determination；Or

When the MN has more than two interfaces, the SDN controllers receive the 4th bearer messages from the corresponding MAG of an interface of the MN, the L2 layer attach requests of the MN are included in 4th bearer messages, the SDN controllers determine to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 4th bearer messages.

With reference to second of embodiment of the fourth aspect of the embodiment of the present invention, in the tenth kind of embodiment of the fourth aspect of the embodiment of the present invention, SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include： --described SDN controllers determine that the MN opens the second interface do not opened；

The SDN controllers receive the 5th bearer messages from the first MAG, and determine that the first data flow is moved to the second interface of the MN from the first interface of the MN according to the 5th bearer messages；The L2 layer attach requests of the MN are included in 5th bearer messages, the L2 layers attach request of the MN is used to ask to be linked into the first MAG by the second interface.

As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：

In the embodiment of the present invention, SDN controllers include：First determining unit, for determining to need to be moved to the first data flow into the second interface of the MN from the first interface of mobile node MN, the first interface correspondence first path, second path of second interface correspondence, and judge whether the Mobile Access Gateway MAG included in second path is same equipment with the MAG included in the first path；Second determining unit, determines in the network element device in second path to need to receive the network element device that flow table item adjusts message for the judged result according to first determining unit；First transmitting element, the network element device that flow table item adjustment message is received the need for for being determined to second determining unit sends the flow table item adjustment message, first data flow is moved to second path transmission from the first path to realize, the flow table item adjustment message is used for the flow table item for indicating that the network element device is adjusted according to the flow table item in the content adjustment network element device of message, without being held consultation between network element device, and compared with prior art, in data flow moving process, network element device LMA and MAG can be operated according to the instruction of SDN controllers, so network element device LMA and MAG go for arbitrary Internet protocol（IP, Internet Protocol), and then saved in networking cost.

Brief description of the drawings

Fig. 1 is SDN controller one embodiment schematic diagrames in the embodiment of the present invention；

Fig. 2 is another embodiment schematic diagram of SDN controllers in the embodiment of the present invention；

The schematic diagram of data flow movement Fig. 3 is only has a MAG in the embodiment of the present invention when；

Fig. 4 is another embodiment schematic diagram of SDN controllers in the embodiment of the present invention；

The schematic diagram of data flow movement when Fig. 5 is has multiple MAG in the embodiment of the present invention；

Fig. 6 is another embodiment schematic diagram of SDN controllers in the embodiment of the present invention；

Fig. 7 is network system one embodiment schematic diagram in the embodiment of the present invention；

Fig. 8 be in the embodiment of the present invention in network system between each network element and network Signalling exchange schematic diagram；Fig. 9 be in the embodiment of the present invention in network system between each network element and network Signalling exchange schematic diagram；Figure 10 be in the embodiment of the present invention in network system between each network element and network Signalling exchange signal - -

Figure 11 is that the schematic diagram 12 of Signalling exchange is SDN controller one embodiment schematic diagrames in the embodiment of the present invention between each network element and network in network system in the embodiment of the present invention；

Figure 13 is method one embodiment schematic diagram of data flow movement in the embodiment of the present invention；

Figure 14 is another embodiment schematic diagram of method of data flow movement in the embodiment of the present invention；

Figure 15 is another embodiment schematic diagram of method of data flow movement in the embodiment of the present invention；

Figure 16 is another embodiment schematic diagram of method of data flow movement in the embodiment of the present invention；

Figure 17 is another embodiment schematic diagram of method of data flow movement in the embodiment of the present invention.

Embodiment

The embodiment of the present invention provides a kind of method, network system and the SDN controllers of data flow movement, without being held consultation between network element device, and compared with prior art, in data flow moving process, network element device LMA and MAG can be operated according to the instruction of SDN controllers, so network element device LMA and MAG go for arbitrary IP agreement, and then have saved in networking cost.

It should be noted that only being illustrated in the embodiment of the present invention so that different data flows is using different mailing address prefixes as an example, i.e., when initial, LMA distributes different mailing address prefixes for different data flows.

Fig. 1 is refer to, Fig. 1 is the self-defined network of software in the embodiment of the present invention（SDN, Software Defined Network) controller one embodiment, the SDN controllers include：First determining unit 101, the second determining unit 102, the first transmitting element 103;

First determining unit 101, for determining to need to be moved to the first data flow into the second interface of the MN from the first interface of mobile node MN, the first path of first interface the first data flow of correspondence, second path of second interface the first data flow of correspondence, and judge whether the Mobile Access Gateway MAG included in the second path is same equipment with the MAG included in first path；First path and the second path in the present embodiment refer both to flow path of first data flow from MN to LMA.

Second determining unit 102, for being determined to need to receive the network element device that flow table item adjusts message in the network element device in second path according to the judged result of the first determining unit 101.

First transmitting element 103, network element device for being determined to the second determining unit 102 sends flow table item adjustment message, and flow table item adjustment message is used to indicate the first data flow is moved into the second path transmission from first path.

In the present embodiment, SDN controllers judge what is included in second path by the first determining unit - -

Whether MAG is same equipment with the MAG included in the first path, second determining unit determines in the network element device in second path to need to receive the network element device that flow table item adjusts message according to the judged result of first determining unit, first transmitting element sends flow table item adjustment message to the network element device of determination, transmitted with realizing first data flow being moved in second path, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

In order to be better understood from the above embodiments, the interaction of the unit and element that are included below with a specific embodiment to SDN controllers is illustrated to the data interactive mode in SDN controllers, refer to Fig. 2, Fig. 2 shown when it is a MAG to only have MAG equipment, the MAG equipment in network, the structure of SDN controllers.

Introduce first when determination needs to carry out data flow transfer, MN second interface is when having turned on state, the structure of the SDN controllers, the SDN controllers includes：First determining unit 201, the second determining unit 202 and the first transmitting element 203；

First determining unit 201 includes：Second determination subelement 2011, the first receiving subelement 2012 and the 3rd determination subelement 2013, specifically：

When it is determined that needing the first data flow being moved to before the second interface of the MN from the first interface of mobile node MN, second determination subelement 2011 determines the second interface to have turned on state, first receiving subelement 2012 receives the first bearer messages that the first MAG is sent, first bearer messages include the identification information of second interface, the title of the identification information such as second interface, numbering etc., the first bearer messages that 3rd determination subelement 2013 is received according to the first receiving unit 2012 determine to need to be moved to the first data flow into MN second interface from MN first interface.

Name a practical application scene to illustrate, such as shown in Fig. 3, when initial, data flow X is transferred to the first MAG by MN by interface 1, is then sent to LMA via the first MAG.When SDN controllers determine to need to use 2 transmitting data stream X of interface, first MAG can send the first bearer messages to SDN controllers, first bearer messages are used for the identification information for informing SDN control unit interfaces 2, and SDN controllers determine to need to be moved to the first data flow into MN second interface from MN first interface according to the first bearer messages.In actual applications, due to second interface to have turned on state, now MN by second interface without being registered in network, so MN directly can send the first data by second interface flows to the first MAG. --it should be noted that, in original state, first MAG includes the flow table item of the first data flow, no matter the first data flow is sent to the first MAG from MN which interface, first stream compression can be sent to LMA by the first MAG according to the flow table item of the first data flow, therefore, when the first MAG sends the first bearer messages to SDN controllers, the first stream compression received from second interface can be sent to LMA by the first MAG, certain first MAG can also be after the first flow table item adjustment message be received, retransmit the first data and flow to LMA.

In the present embodiment, due to only having a MAG equipment in network, so the judged result of the first determining unit 201 is the MAG included in second path and the MAG included in the first path is same equipment, and same equipment is the first MAG, second determining unit 202 determines that the first MAG is to need to receive the network element device that flow table item adjusts message, and first flow table item adjustment message is sent into the first MAG by the first transmitting element 203.

First flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of the first flow table item adjustment message, and the content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of first occurrence：The next-hop of first data flow in flow table item is set to second interface.

In the present embodiment, as an only MAG, judge whether the MAG included in second path is same equipment with the MAG included in the first path by the first determining unit, second determining unit determines that the first MAG is to need to send the network element device that flow table item adjusts message according to judged result, then the first transmitting element sends the first flow table item adjustment message to the first MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

It is the first MAG to be described below when only having a MAG equipment, the MAG in network, and before the movement of the first data flow, when second interface is non-opening, the structure of the SDN controllers, the SDN controllers include：First determining unit 201, the second determining unit 202 and the first transmitting element 203.

First determining unit 201 includes：9th determination subelement 2014, the 5th receiving subelement 2015 and the tenth determination subelement 2016, specifically：

9th determination subelement 2014 determines that MN opens the second interface do not opened, MN sends L2 layers of attach request to the first MAG, second interface is linked into the first MAG by MN using L2 layers of attach request, first MAG is received after L2 layers of attach request, and sending the 5th carrying to SDN controllers disappears --breath, 5th receiving subelement 2015 receives the 5th bearer messages from the first MAG, the L2 layer attach requests of the MN are included in 5th bearer messages, the 5th bearer messages that then the tenth determination subelement 2016 is received according to the 5th receiving subelement 2015 determine to need to be moved to the first data flow into MN second interface from MN first interface.

In the present embodiment, due to only having a MAG equipment in network, so the judged result of the first determining unit 201 is the MAG included in the second path and the MAG included in the first path is same equipment, and same equipment is the first MAG, second determining unit 202 determines that the first MAG is to need to send the network element device that flow table item adjusts message, and first flow table item adjustment message is sent into the first MAG by the first transmitting element 203.

It should be noted that due to only having a MAG in the present embodiment, the first data flow is sent in LMA by as the first MAG, original state, MN by first interface via the first MAG, has now had built up tunnel between the first MAG and LMA；When the first data flow is switched to second interface transmission by MN first interface, tunnel does not change, and MN has known the corresponding network address prefix of the first data flow in original state, so tunnel need not be re-established, while SDN controllers need not reconfigure mailing address prefix for MN.

In the present embodiment, as an only MAG, first determining unit judges whether the MAG included in second path is same equipment with the MAG included in the first path, second determining unit determines that the first MAG is to need to send the network element device that flow table item adjusts message according to judged result, then the first transmitting element sends the first flow table item adjustment message to the first MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

Fig. 4 is referred to below, and Fig. 4 is another embodiment of SDN controllers in the embodiment of the present invention, and Fig. 4 is shown when there are multiple MAG equipment in network, the structure of SDN controllers, and the multiple MAG equipment includes the first MAG, the 2nd MAG.

SDN is controlled when the present embodiment mainly introduces the load overload trigger data stream movement due to the first MAG The structure of-- processed device, the SDN controllers include：First determining unit 401, the second determining unit 402, the first transmitting element 403;

First determining unit 401 includes：Subelement 4011, the first determination subelement 4012 and selection subelement 4013 are obtained, specifically：

Subelement 4011, the load information for obtaining corresponding first MAG of first interface are obtained, the load information can refer to the quantity of the interface for the MN for receiving the first MAG, and the quantity of MAG accesses MN interface is more, loads bigger.

First determination subelement 4012, the load information for being got according to acquisition subelement 4011 determines the first MAG load, when the first MAG load is more than or equal to the wealthy value of preset load, triggering obtains the load information that subelement 4011 obtains the MN corresponding MAG of other interfaces.

Select subelement 4013, for according to obtaining, subelement 4011 to obtain the MN corresponding MAG of other interfaces load information and MN position selects another MAG from the corresponding MAG of other interfaces for MN, another MAG can be the MAG that load is less than the preset wealthy value of load, can also be the MAG of most lightly loaded, in the present embodiment, another MAG is the 2nd MAG, and the 2nd MAG is corresponding with second interface.

Now second interface may be the state that has turned on, or be non-opening, mainly be illustrated herein by the state of having turned on of second interface.First determining unit 401 further comprises：4th determination subelement 4014, the second receiving subelement 4015 and the 5th determination subelement 4016, specifically：

4th determining unit 4014, for determining that second interface is to have turned on state；

Second receiving subelement 4015, for receiving the second bearer messages that the 2nd MAG is sent, the second bearer messages include the identification information of second interface；

5th determination subelement 4016, the second bearer messages received according to the second receiving subelement 4015 determine to need to be moved to the first data flow into MN second interface from MN first interface.

Citing is illustrated below, for example shown in Fig. 5, when initial, data flow X and data flow Y is output to the first MAG by MN by interface 1, then data flow X and data flow Y are output to LMA by the first MAG, LMA is that the mailing address prefix of data flow X distribution is prefl, and the mailing address prefix for being data flow Y distribution is pref2.The flow table item forwarded to data flow X and data flow Y is preserved in first MAG respectively, the mailing address prefix that the corresponding flow table items of data flow X have is prefl, and the mailing address prefix that the corresponding flow table items of data flow Y have is pref2.

At a time, SDN controllers obtain the first MAG load information, when it is determined that the first MAG --load information when being more than or equal to the wealthy value of preset load, it is determined that needing data flow Y entering line interface transfer.SDN controllers obtain the MN corresponding MAG of other interfaces load information, most lightly loaded is obtained from other MAG according to MN position or load is used as the 2nd MAG less than the MAG for loading wealthy value, 2nd MAG corresponding interfaces 2, such SDN controllers, which have been determined that, to be needed data flow Y being transferred to interface 2 from interface 1.Because interface 2 is to have turned on state, now MN by interface 2 without being registered in network, 2nd MAG directly sends the first bearer messages to SDN controllers, first bearer messages include the identification information of second interface, and such SDN controllers, which have been determined that, to be needed data flow Y being transferred to second interface.

Due to there is multiple MAG equipment in network in the present embodiment, so it is determined that needing the first data flow after MN first interface shifts MN second interface, first determining unit 401 also needs to judge whether the MAG included in the second path and the MAG included in first path are same equipment, the judged result of the present embodiment is no, the first MAG is included i.e. in first path, the 2nd MAG is included in second path, the second determining unit 402 determines that local mobility anchor fixed point LMA and the 2nd MAG is to need to receive the network element device that flow table item adjusts message.

First transmitting element 403 is to needing the network element device for receiving flow table item adjustment message to send in flow table item adjustment message, the present embodiment, and the first transmitting element 403 is specifically included：First transmission sub-unit 4031 and the second transmission sub-unit 4032, wherein：

First transmission sub-unit 4031 is used for, and the second flow table item adjustment message is sent to the 2nd MAG, and the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to the second flow table item increases by the second flow table item.The content of second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And second flow table item adjustment message content also include：3rd matching preceding paragraph：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface.

Second transmission sub-unit 4032 is used for, the 3rd flow table item adjustment message is sent to LMA, 3rd flow table item adjustment message is used to indicate that the flow table item in LMA is revised as the 3rd flow table item by LMA according to the content of the 3rd flow table item adjustment message, and the content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

Sent out in addition, SDN controllers can also include the 3rd determining unit 404, encapsulation unit 405 and the 4th --send unit 406, wherein：

3rd determining unit 404 is used for, after the first transmission sub-unit 4031 sends the 3rd flow table item adjustment message to LMA to the 2nd MAG the second flow table item of transmission adjustment message and the second transmission sub-unit 4032, determine that LMA and the 2nd MAG have adjusted flow table item.

Encapsulation unit 405 is used for, and the mailing address prefix of the first data flow is encapsulated in router advertisement RA message.

4th transmitting element 406 is used for, and RA message is sent into MN by the 2nd MAG.

In the present embodiment, the first data flow is transferred to after the second path from first path, and used mailing address prefix keeps constant.

In the present embodiment, when there is multiple MAG, it can be the 2nd MAG of MN selections by MAG load state information and MN position to select subelement, then the second determining unit determines that the 2nd MAG is to need to send the network element device that flow table item adjusts message in LMA and second path, and the second flow table item adjustment message and the second transmission sub-unit are sent to LMA transmission the 3rd flow table item adjustment message to the 2nd MAG by the first transmission sub-unit, so that the first data flow is sent to LMA from MN second interface via the 2nd MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

It is described above to work as in network and there are multiple MAG equipment, and due to the structure of SDN controllers when the first MAG load overload triggers data flow movement, it is explained below to work as in network and there are multiple MAG equipment, the structure of SDN controllers when triggering data flow movement due to there is new interface to open, specifically referring to Fig. 6, SDN controllers include in Fig. 6：First determining unit 601, the second determining unit 602, the second transmitting element 603, the 3rd transmitting element 604 and the first transmitting element 605.

Wherein, first determining unit 601 includes the 6th determination subelement 6011, the 3rd receiving subelement 6012 and the 7th determination subelement 6013, or first determining unit 601 includes the 6th determination subelement 6011, the 4th receiving subelement 6014 and the 8th determination subelement 6015.

First transmitting element 605 includes the first transmission sub-unit 6051 and the second transmission sub-unit 6052.Wherein, 6th determination subelement 6011 determines that MN opens the second interface do not opened, because MN second interface is new unlatching interface, not access network, therefore MN needs to send MN L2 layer attach requests to the 2nd MAG, second interface is linked into the 2nd MAG using L2 layers of attach request, the 2nd MAG is received after the L2 layer attach requests of MN transmissions, sending the 3rd to SDN controllers carries --message.

3rd receiving subelement 6012 receives the 3rd bearer messages that the 2nd MAG is sent, MN L2 layer attach requests are included in 3rd bearer messages, the 3rd bearer messages that the 7th determination subelement 6013 is received according to the 3rd receiving subelement 6012 determine to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN.

The above is the explanation carried out so that MN has two interfaces as an example, when MN has more than two interfaces, 6th determination subelement 6011 determines that MN opens the second interface do not opened, 4th receiving subelement 6014 can receive the 4th bearer messages from the MN corresponding MAG of any one interface, MN L2 layer attach requests are included in 4th bearer messages, the 4th bearer messages that 8th determination subelement 6015 is received according to the 4th receiving subelement 4019 determine to need to be moved to the first data flow into MN second interface from MN first interface

In the present embodiment, there are multiple MAG equipment in network, so being determined to need by the first data flow after MN first interface shifts MN second interface in the first determining unit 601, also need to judge whether the MAG that is included in the second path and the MAG included in first path are same equipment, the judged result of the present embodiment is no, the first MAG is included i.e. in first path, the 2nd MAG is included in second path, the second determining unit 602 determines that local mobility anchor fixed point LMA and the 2nd MAG is to need to receive the network element device that flow table item adjusts message.

Because MN second interface is new unlatching interface, tunnel is not set up also between LMA and the 2nd MAG, so the second determining unit 602 determine local mobility anchor fixed point LMA and the 2nd MAG be need receive flow table item adjustment message network element device after, the tunnel set up between LMA and the 2nd MAG is needed, specifically：

The first tunnel building message is sent from the second transmitting element 603 to LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between LMA and the 2nd MAG；The second tunnel building message is sent from the 3rd transmitting element 604 to the 2nd MAG, the second tunnel building message is used for the tunnel interface for the 2nd MAG sides for indicating the tunnel that the 2nd MAG is set up between LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between LMA and the 2nd MAG.

Set up between LMA and the 2nd MAG after tunnel, the second flow table item adjustment message, the adjustment of the second flow table item are sent from the first transmission sub-unit 6051 in the first transmitting element 605 to the 2nd MAG --message is used to indicate that the content that the 2nd MAG adjusts message according to the second flow table item increases by the second flow table item.The content of second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And second flow table item adjustment message content also include：3rd matching preceding paragraph：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface.

Simultaneously the 3rd flow table item adjustment message is sent from the second transmission sub-unit 6052 to LMA, 3rd flow table item adjustment message is used to indicate that the flow table item in LMA is revised as the 3rd flow table item by LMA according to the content of the 3rd flow table item adjustment message, and the content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

In addition, the SDN controllers in the present embodiment can also include the 3rd determining unit 606, the transmitting element 608 of encapsulation unit 607 and the 4th, wherein：

3rd determining unit 606 is used for, after the first transmission sub-unit 6051 sends the 3rd flow table item adjustment message to LMA to the 2nd MAG the second flow table item of transmission adjustment message and the second transmission sub-unit 6052, determine that LMA and the 2nd MAG have adjusted flow table item.

Encapsulation unit 607 is used for, and the mailing address prefix of the first data flow is encapsulated in router advertisement RA message.

4th transmitting element 608 is used for, and RA message is sent into MN by the 2nd MAG.

In the present embodiment, when there is multiple MAG, after the 2nd MAG during the second determining unit determines LMA and second path is to need to send the network element device of flow table item adjustment message, second transmitting element sends the first tunnel building message to the LMA, 3rd transmitting element sends the second tunnel building message to the 2nd MAG, so as to the tunnel set up between LMA and the 2nd MAG, then the second flow table item is sent to the 2nd MAG by the first transmission sub-unit and adjusts message, and by the second transmission sub-unit to the 2nd MAG send the second flow table item adjust message, so that the first data flow is sent to LMA from second interface via the 2nd MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

Fig. 7 is referred to below, and Fig. 7 is network system one embodiment, the network system in the embodiment of the present invention --include：SDN controllers 11, MN 12, at least one MAG 13;

SDN controllers 11 are used to perform following scheme：

It is determined that needing to be moved to the first data flow into MN 12 second interface from MN 12 first interface, the first path of first interface the first data flow of correspondence, second path of second interface correspondence first data flow, and judge whether the MAG that is included in the second path and the MAG included in first path are same equipment；

Determined in the network element device in second path to need to receive the network element device that flow table item adjusts message according to judged result；

Flow table item adjustment message is sent to the network element device that flow table item adjustment message is received the need for determination, flow table item adjustment message is used to indicate the first data flow is moved into the second path transmission from first path.

In addition, flow table item adjustment message is additionally operable to indicate the flow table item that network element device is adjusted according to flow table item in the content adjustment network element device of message.

In the present embodiment, when in data flow moving process, SDN controllers may determine that whether the MAG included in second path the and MAG included in first path is same equipment, and determined in the network element device in second path to need to receive the network element device that flow table item adjusts message according to judged result, then flow table item adjustment message is sent to the network element device of determination, the first data flow is moved to the second path transmission from first path to realize, without being held consultation between network element device, and compared with prior art, in data flow moving process, reduce the Signalling exchange between network element device, so network element device goes for arbitrary IP agreement, and then cost has been saved in networking.

One embodiment of the signalling interactive process in inventive network system between each network element device is described below, referring to Fig. 8, in the present embodiment, network system includes：SDN controllers 11, MN 12, the first MAG 131, MN 12 second interface are to have turned on state.

It should be noted that the first MAG 131 belongs to the MAG of at least one in above-described embodiment 13.

801st, the first MAG 131 sends the first bearer messages to SDN controllers 11, and first bearer messages include the identification information of the second interface；

802nd, SDN controllers 11 determine the second interface for needing to be moved to first data flow into MN 12 from MN 12 first interface according to first bearer messages received, the first path of first interface the first data flow of correspondence, the second path of second interface the first data flow of correspondence；

803rd, SDN controllers 11 judge whether the MAG included in second path and the MAG included in first path are same equipment； - -

804th, SDN controllers 11 are same equipment in the MAG that judged result is the MAG that the first path is included and second path is included, and same MAG be a MAG 131 when, determine the first MAG131 be need send flow table item adjust message network element device；

805th, SDN controllers 11 send the first flow table item adjustment message to the first MAG131；

806th, the flow table item that itself is stored is revised as first flow table item by the first MAG131 according to first flow table item adjustment message received, and the content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of first occurrence：The next-hop of first data flow in flow table item is set to second interface.

In the present embodiment, as an only MAG, SDN controllers 11 judge whether the MAG included in second path is same equipment with the MAG included in the first path, and determine that the first MAG131 is to need to receive the network element device that flow table item adjusts message according to judged result, SDN controllers 11 send the first flow table item adjustment message to the first MAG131, first MAG131 adjusts message according to first flow table item received and the flow table item that itself is stored is revised as into first flow table item, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

Another embodiment of the signalling interactive process in inventive network system between each network element device is described below, referring to Fig. 9, network system includes：SDN controllers 11, MN 12, the first MAG 131, and before the movement of the first data flow, MN 12 second interface is non-opening.

It should be noted that the first MAG131 belongs to the MAG of at least one in above-described embodiment 13.

901st, MN 12 opens the second interface, and sends L2 layers of attach request to the first MAG 131；902nd, the L2 layers of attach request is carried in the 5th bearer messages by the first MAG 131, and send the 5th bearer messages to SDN controllers 11, MN12 is that the second interface is linked into the first MAG 131 by the L2 layers of attach request to the first MAG purposes for sending L2 layers of attach request;

903rd, SDN controllers 11 determine to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 5th bearer messages；

904th, SDN controllers 11 judge whether the MAG included in second path and the MAG included in the first path are same equipment；

905th, SDN controllers 11 are same equipment in the MAG that judged result is the MAG that the first path is included and second path is included, and same equipment is when being a MAG 131, determines first - -

MAG131 is to need to send the network element device that flow table item adjusts message；

906th, SDN controllers 11 send the first flow table item adjustment message to the first MAG131；

907th, the flow table item that itself is stored is revised as first flow table item by the first MAG 131 according to first flow table item adjustment message received, and the content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of first occurrence：The next-hop of the first data flow in flow table item is set to second interface.

In the present embodiment, when only having a MAG in network system, SDN controllers 11 judge whether the MAG included in second path is same equipment with the MAG included in the first path, and determine that the first MAG is to need to receive the network element device that flow table item adjusts message according to judged result, then the first flow table item adjustment message is sent to the first MAG, first MAG 131 adjusts message according to first flow table item received and the flow table item that itself is stored is revised as into first flow table item, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can basis

The instruction of SDN controllers is operated, and such network element device MAG goes for arbitrary IP agreement, and then has saved in networking cost.

Another embodiment of the signalling interactive process in the present embodiment between the network element device of each in network system is described below, referring to Fig. 10, network system includes：SDN controllers 11, MN 12, the 2nd MAG

132 and the 3rd MAG 133, LMA 14.

It should be noted that the 2nd MAG 132 and the 3rd MAG 133 belong to the MAG of at least one in above-described embodiment 13, the present embodiment is mainly illustrated when the first MAG is loaded and overloaded exemplified by the movement of trigger data stream.

1001st, SDN controllers 11 obtain corresponding first MAG of first interface load information；

1002nd, the load that then SDN controllers 11 determine the first MAG according to the load information got is more than or equal to the preset wealthy value of load, SDN controllers obtain the MN corresponding MAG of other interfaces load information, 2nd MAG is selected for MN from the corresponding MAG of other interfaces according to the MN got the corresponding MAG of other interfaces load information and MN position, 2nd MAG is corresponding with second interface, and the 2nd MAG can be less than the MAG of the preset wealthy value of the load or MAG of load minimum for load in all MAG;

1003rd, the 2nd MAG 132 sends the second bearer messages to SDN controllers 11, and second bearer messages include the identification information of the second interface；

1004th, SDN controllers 11 determine first data flow according to second bearer messages received --is moved to MN 12 second interface from MN 12 first interface.

1005th, SDN controllers 11 judge whether the MAG included in second path and the MAG included in first path are same equipment；

If the 1006, judged result is the MAG that the first path is included and the MAG that second path is included is not same equipment, SDN controllers 11 determine that the 2nd MAG 132 is to need to receive the network element device that flow table item adjusts message in LMA 14 and second path；

1007th, SDN controllers 11 send the second flow table item adjustment message to the 2nd MAG 132, and the content of second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of second occurrence：The first data flow in flow table item is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of second flow table item adjustment message also includes：3rd occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of 3rd occurrence：The next-hop of the first data flow in flow table item is set to second interface；

1008th, the 2nd MAG 132 increases by second flow table item according to second flow table item adjustment message received；

1009th, SDN controllers 11 send the 3rd flow table item adjustment message to LMA 14, and the content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of 4th occurrence：The first data flow in flow table item is forwarded from the MAG tunnel interfaces of LMA- the 2nd；

1010th, LMA 14 adjusts message according to the 3rd flow table item received and the flow table item that itself is stored is revised as into the 3rd flow table item.

In the present embodiment, when there is multiple MAG, SDN controllers 11 can be the 2nd MAG 132 of MN selections by MAG load information and MN position, and receive the second bearer messages from the 2nd MAG, SDN controllers 11 determine that first data flow is moved to MN 12 second interface from MN 12 first interface according to second bearer messages, then SDN controllers 11 determine that the 2nd MAG 132 is to need to receive the network element device that flow table item adjusts message in LMA 14 and second path, and send the second flow table item adjustment message to the 2nd MAG 132, the 3rd flow table item adjustment message is sent to LMA 14, so that the first data flow is sent to LMA from MN second interface via the 2nd MAG, 2nd MAG 132 increases by second flow table item according to second flow table item adjustment message received, LMA 14 adjusts message according to the 3rd flow table item received and the flow table item that itself is stored is revised as into the 3rd flow table item, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be with --is operated according to the instruction of SDN controllers, and such network element device MAG goes for arbitrary IP agreement, and then has saved in networking cost.

Another embodiment of the signalling interactive process in inventive network system between each network element device is described below, Figure 11 is referred to, network system includes：SDN controllers 11, MN 12, the 2nd MAG 132, LMA 14, when initial, MN 12 second interface is non-opening, and the present embodiment is mainly illustrated by taking the movement that MN opens second interface trigger data stream as an example.

It should be noted that the 2nd MAG 132 belongs to the MAG of at least one in above-described embodiment 13.1101st, MN 12 opens the second interface, and sends L2 layers of attach request to the 2nd MAG 132 by the second interface;

1102nd, the L2 layers of attach request is carried in the 3rd bearer messages by the 2nd MAG132, and the 3rd bearer messages are sent to SDN controllers 11;

1103rd, SDN controllers 11 determine that the first data flow is moved to the second interface of the MN 12 from MN 12 first interface according to the 3rd bearer messages received；

Another sunset is foretold, when MN 12 has more than two interfaces, and SDN controllers can also be received in the 4th bearer messages, the 4th bearer messages comprising L2 layers of attach request by the corresponding MAG of any one interface；Then determined to need to be moved to the first data flow into MN second interface from MN first interface according to the 4th bearer messages.

1104th, SDN controllers 11 judge whether the MAG included in second path and the MAG included in a path are same equipment；

1105th, when the MAG that judged result is the MAG that the first path is included and second path is included is not same equipment, first path includes the first MAG131, when second path includes two MAG132, SDN controllers 11 determine that the 2nd MAG 132 is to need to receive the network element device that flow table item adjusts message in LMA 14 and second path；

1106th, SDN controllers 11 send the first tunnel building message to LMA 14, and the first tunnel building message includes：The tunnel configuration message set up between the MAG 132 of LMA 14 and the 2nd；

1107th, the tunnel interface of the sides of LMA 14 in the tunnel that the first tunnel building message that just blunt evidence is received of LMA 14 is set up between the LMA and the 2nd MAG；

1108th, SDN controllers 11 send the second tunnel building message to the 2nd MAG132, and the second tunnel building message includes：The tunnel configuration message set up between the MAG 132 of LMA 14 and the 2nd；

1109th, the 2nd MAG 132 sets up the LMA according to the second tunnel building message received The tunnel interface of the 2nd MAG132 sides in the tunnel of-- between the 2nd MAG.

1110th, SDN controllers 11 send the second flow table item adjustment message to the 2nd MAG 132, and the content of second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of second occurrence：First data flow in flow table item is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of second flow table item adjustment message also includes：3rd occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of 3rd occurrence：The next-hop of the first data flow in flow table item is set to second interface；

1111st, the 2nd MAG 132 increases by second flow table item according to second flow table item adjustment message received；

1112nd, SDN controllers 11 send the 3rd flow table item adjustment message to LMA 14, and the content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of 4th occurrence：The first data flow in flow table item is forwarded from the MAG tunnel interfaces of LMA- the 2nd；

1113rd, LMA 14 adjusts message according to the 3rd flow table item received and the flow table item that itself is stored is revised as into the 3rd flow table item；

1114th, SDN controllers 11 by the mailing address prefix encapsulation of the first data flow in a ra message, and the RA message are sent to the 2nd MAG 132 when SDN controllers 11 determine that the MAG 132 of LMA 14 and the 2nd have adjusted flow table item;

1115th, the 2nd MAG 132 sends the RA message to MN 12.

It should be noted that, in the embodiment of the present invention MAG equipment have it is multiple in the case of, after the movement of first data flow, also include the related flow table item of the first data flow in MAG where before the movement of first data flow, now SDN controllers 11 can be sent in the MAG where before flow table entry deletion message is moved to the first data flow, the flow table entry deletion message is used to indicate that the MAG deletes the related flow table item of the first data flow, or the MAG within the defined time when not having using the related flow table item of the first data flow, delete the related flow table item of first data flow.

In the present embodiment, when there is multiple MAG, SDN controllers 11 are determined in the paths of LMA 14 and second after network element devices of the 2nd MAG 132 to need to send flow table item adjustment message, SDN controllers 11 send the first tunnel building message to LMA 14, and send the second tunnel building message to the 2nd MAG 132, so as to the tunnel set up between LMA and the 2nd MAG, then message is adjusted by sending the second flow table item to the 2nd MAG, the 3rd flow table item adjustment message, the 2nd MAG 132 are sent to the LMA --second flow table item is increased according to second flow table item adjustment message received, LMA 14 adjusts message according to the 3rd flow table item received and the flow table item that itself is stored is revised as into the 3rd flow table item, so that the first data flow is sent to LMA 14 from second interface via the 2nd MAG 132, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

SDN controllers in the embodiment of the present invention are further described below, SDN controllers one embodiment in Figure 12, the embodiment of the present invention is referred to, the SDN controllers include：Processor 1201 and transmitter 1202;

Processor 1201, for determining to need the first data flow being moved to this from the first interface of the MN

MN second interface, the first path of first interface the first data flow of correspondence, the second path of second interface the first data flow of correspondence, and judge whether the MAG included in second path is same equipment with the MAG included in the first path；

Processor 1201, is additionally operable to be determined to need to receive the network element device that flow table item adjusts message in the network element device in second path according to the judged result；

Transmitter 1202, for sending flow table item adjustment message to the network element device of determination, flow table item adjustment message is used to indicate the first data flow is moved into the second path transmission from the first path.

The processor 1201, if it is that the MAG that the MAG that the first path is included is included with second path is same equipment to be additionally operable to the judged result, the same equipment is the first MAG, determines the first MAG to need to receive and sends the network element device that flow table item adjusts message by the SDN controllers；

The transmitter 1202, it is additionally operable to send the first flow table item adjustment message to the first MAG, the first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of first flow table item adjustment message；

The processor 1201, if it is not to include first in same equipment, the first path that to be additionally operable to the judged result, which be the MAG included in the first path with the MAG included in second path, - -

The 2nd MAG is included in MAG, second path, it is to need to receive the network element device that the flow table item adjusts message to determine local mobility anchor fixed point LMA and the 2nd MAG；

Transmitter 1202, is additionally operable to send the second flow table item adjustment message to the 2nd MAG, the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to second flow table item increases by the second flow table item；And

Transmitter 1202, is additionally operable to send the 3rd flow table item adjustment message to the LMA, the 3rd flow table item adjustment message is used to indicate that the flow table item in the LMA is revised as the 3rd flow table item by the LMA according to the content of the 3rd flow table item adjustment message；

The processor 1201, is additionally operable to determine that the 2nd MAG and LMA does not set up tunnel；The transmitter 1202, it is additionally operable to send the first tunnel building message to the LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that the LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG；

The transmitter 1202, it is additionally operable to send the second tunnel building message to the 2nd MAG, the second tunnel building message is used for the tunnel interface for indicating the 2nd MAG sides in the tunnel that the 2nd MAG is set up between the LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG.

The processor 1201, is additionally operable to determine that the LMA and the 2nd MAG has adjusted flow table item；The transmitter 1202, is additionally operable to the mailing address prefix of first data flow being encapsulated in router advertisement RA message, and the RA message is sent into the MN by the 2nd MAG.

The processor 1201, is additionally operable to obtain corresponding first MAG of first interface load information； --described processor 1201, is additionally operable to determine that the load of the first MAG is more than or equal to the preset wealthy value of load according to the load information；

The processor 1201, it is additionally operable to obtain the corresponding MAG of other interfaces of MN load information, and be that the MN selects the 2nd MAG from the corresponding MAG of other described interfaces according to the acquired corresponding MAG of other interfaces load information and the position of the MN, the 2nd MAG is corresponding with the second interface.

The processor 1201, is additionally operable to determine the second interface to have turned on state；

The SDN controllers also include receiver；

The receiver, for receiving the first bearer messages that the first MAG is sent, first bearer messages include the identification information of the second interface；

The processor 1201, is additionally operable to determine that first data flow is moved to the second interface of the MN by needs from the first interface of the MN according to first bearer messages.

The receiver, is additionally operable to receive the second bearer messages that the 2nd MAG is sent, second bearer messages include the identification information of the second interface；

The processor 1201, is additionally operable to determine that first data flow is moved to the second interface of the MN by needs from the first interface of the MN according to second bearer messages.

The processor 1201, is additionally operable to determine that the MN opens the second interface do not opened；The receiver, it is additionally operable to receive the 3rd bearer messages from the 2nd MAG, the L2 layer attach requests of the MN are included in 3rd bearer messages, the processor 1201, is additionally operable to be determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 3rd bearer messages；Or

When the MN has more than two interfaces, the receiver, it is additionally operable to from the corresponding MAG of an interface of the MN receive the 4th bearer messages, the L2 layer attach requests of the MN are included in 4th bearer messages, the processor 1201, is additionally operable to be determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 4th bearer messages.

The processor 1201, is additionally operable to determine that the MN opens the second interface do not opened；The receiver, for receiving the 5th bearer messages from the first MAG, the processor 1201 is additionally operable to determine that the first data flow is moved to the second interface of the MN from the first interface of the MN according to the 5th bearer messages； The L2 layer attach requests of the MN are included in the bearer messages of-- described 5th, the L2 layers attach request of the MN is used to ask to be linked into the first MAG by the second interface.

In the present embodiment, when in data flow moving process, SDN controllers may determine that whether the MAG included in second path is same equipment with the MAG included in the first path where the first interface by processor 1201, and determined in the network element device in second path to need to receive the network element device that flow table item adjusts message according to judged result, then the flow table item is sent to the network element device of determination by transmitter 1202 and adjusts message, the first data flow is moved to the second path transmission from the first path to realize, without being held consultation between network element device, and compared with prior art, in data flow moving process, reduce the Signalling exchange between network element device, so network element device goes for arbitrary IP agreement, and then cost has been saved in networking.

The method of the data flow movement to being performed for above-mentioned SDN controllers is illustrated below, and referring to method one embodiment that data flow is moved in Figure 13, the embodiment of the present invention includes：

1301st, SDN controllers determine to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN, and judge whether the Mobile Access Gateway MAG included in the second path is same equipment with the MAG included in first path；

In the present embodiment, the first path of first interface the first data flow of correspondence, the second path of second interface the first data flow of correspondence, first path and the second path refer to transmission path of the data flow from MN to LMA.

1302nd, SDN controllers determine in the network element device in second path to need to receive the network element device that flow table item adjusts message according to judged result；

In the present embodiment, SDN controllers may determine that whether the MAG included in the second path is same equipment with the MAG included in the first path where the first interface, then determined to need to send the network element device that flow table item adjusts message in the network element device in second path according to judged result, in actual applications, the MAG that SDN controllers are managed can only have one, can also have multiple, a MAG can correspond to a network.

1303rd, SDN controllers send flow table item adjustment message to the network element device of determination, and flow table item adjustment message is used to indicate the first data flow is moved into the second path transmission from first path.

In the present embodiment, when in data flow moving process, SDN controllers may determine that whether the MAG included in the first path where the MAG included in second path and the first interface is same equipment, and is determined in the network element device in second path according to judged result to need to receive flow table item and adjust message --network element device, then flow table item adjustment message is sent to the network element device of determination, the first data flow is moved to the second path transmission from first path to realize, without being held consultation between network element device, and compared with prior art, in data flow moving process, reduce the Signalling exchange between network element device, so network element device goes for arbitrary IP agreement, and then has saved in networking cost.

The method moved below with an instantiation to data flow in the embodiment of the present invention is described, refer to Figure 14, another embodiment of method that data flow is moved in the embodiment of the present invention, when only one MAG equipment, the MAG are the first MAG, and second interface is when having turned on state, this method includes：

1401st, SDN controllers receive the first bearer messages that the first MAG is sent；

In the present embodiment, SDN controllers can receive the first bearer messages of the first MAG transmissions, and first bearer messages include the identification information of second interface, and the identification information is such as the title, numbering of second interface.In a practical application scene, for example shown in Fig. 3, when initial, data flow X is transferred to the first MAG by MN by interface 1, then sent via the first MAG to LMA, when SDN controllers determine to need to use 2 transmitting data stream X of interface, first MAG can send the first bearer messages to SDN controllers, first bearer messages are used for the identification information for informing SDN control unit interfaces 2, and SDN controllers determine to need to be moved to the first data flow into MN second interface from MN first interface according to the first bearer messages.In actual applications, due to second interface to have turned on state, now MN by second interface without being registered in network, so MN directly can send the first data by second interface flows to the first MAG.

It should be noted that, in original state, first MAG includes the flow table item of the first data flow, no matter the first data flow is sent to the first MAG from MN which interface, first stream compression can be sent to LMA by the first MAG according to the flow table item of the first data flow, therefore, when the first MAG sends the first bearer messages to SDN controllers, the first stream compression received from second interface can be sent to LMA by the first MAG, certain first MAG can also be after the first flow table item adjustment message be received, retransmit the first data and flow to LMA.

1402nd, SDN controllers determine the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to first bearer messages；

1403rd, SDN controllers judge whether the MAG included in the first path where the MAG and the first interface that are included in second path is same equipment；

In the present embodiment, SDN controllers may determine that whether the MAG included in second path is same equipment with the MAG included in the first path where the first interface, because the present embodiment is to be only On the premise of-- one MAG equipment, then it is same with MAG in second path that judged result one, which is set to first path, and same MAG is the first MAG, then performs step 1404.

1404th, SDN controllers determine that the first MAG is to need to receive the network element device that flow table item adjusts message；

1405, SDN controllers send the first flow table item adjustment message to the first MAG.

In the present embodiment, when judged result is the first path and MAG in second path is same, and same MAG is the first MAG, SDN controllers determine that the first MAG is to need to receive the network element device that flow table item adjusts message, first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG, and the content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of first occurrence：The next-hop of the first data flow in flow table item is set to second interface.

In the present embodiment, as an only MAG, the judged result of SDN controllers is the MAG included in the second path and the MAG included in the first path where the first interface is same equipment, SDN controllers determine that the first MAG is to need to receive the network element device that flow table item adjusts message according to judged result, then the first flow table item adjustment message is sent to the first MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

Figure 15 is referred to, when only one MAG equipment, the MAG are the first MAG, and before the movement of the first data flow, when second interface is non-opening, another embodiment of method that data flow is moved in the embodiment of the present invention, including：

1501st, when the MN opens the second interface do not opened, SDN controllers receive the 5th bearer messages from the first MAG；

In the present embodiment, due to it is initial when, MN second interface is non-opening, so before needing to carry out data flow transfer, MN needs to open the second interface do not opened, MN sends L2 layers of attach request to the first MAG after switching, to ask the first MAG that MN second interface is accessed into the first MAG, first MAG receives the L2 layer attach requests of MN transmissions, L2 layers of attach request are encapsulated in the 5th bearer messages, the 5th bearer messages are then sent to SDN controllers.

1502nd, SDN controllers determine to need to be moved to the first data flow into MN second interface from MN first interface according to the 5th bearer messages； - -

1503rd, SDN controllers judge the MAG included in the first path where the MAG and the first interface that are included in second path for same equipment；

In the present embodiment, SDN controllers may determine that whether the MAG included in second path is same equipment with the MAG included in the first path where the first interface, because the present embodiment is on the premise of only one MAG equipment, it is same that so judged result one, which is set to the MAG that first path includes and the MAG that second path is included, and same MAG is the first MAG, then performs step 1504.

1504th, SDN controllers determine that the first MAG is to need to receive the network element device that flow table item adjusts message；

1505th, SDN controllers send the first flow table item adjustment message to the first MAG.

In the present embodiment, as an only MAG, the judged result of SDN controllers is the MAG included in second path and the MAG included in the first path where the first interface is same equipment, SDN controllers determine that the first MAG is to need to receive the network element device that flow table item adjusts message according to judged result, then the first flow table item adjustment message is sent to the first MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

Refer to Figure 16, in the present embodiment, there are multiple MAG equipment in network, the multiple MAG equipment includes the first MAG and the 2nd MAG, and second interface is to have turned on state, accordingly, the trigger condition of the present embodiment data flow transfer loads the method that data flow is moved in overload, the present embodiment for the first MAG and included：

1601, SDN controllers obtain corresponding first MAG of first interface load information；In actual applications, load information can access the quantity information of the first MAG interface for MN, and the quantity of the MN of MAG accesses interface is more, loads bigger. - -

1602nd, SDN controllers determine that the first MAG load is more than or equal to the preset wealthy value of load according to the load information；

1603rd, SDN controllers according to obtain MN the corresponding MAG of other interfaces load information；

1604th, SDN controllers select the 2nd MAG from the corresponding MAG of other interfaces according to the corresponding MAG of other interfaces load information and MN position got for MN;

In the present embodiment, the first MAG correspondence first interfaces, the 2nd MAG correspondence second interfaces, selected 2nd MAG can be the MAG that load is less than the preset wealthy value of load in all MAG, can also be able to be the MAG of most lightly loaded in all MAG.

1605th, SDN controllers receive the second bearer messages of the 2nd MAG transmissions；

In the present embodiment, when initial, tunnel is had been set up between LMA and MAG in state, the second path to have turned on due to second interface, so the 2nd MAG directly can send the second bearer messages to SDN controllers.

1606th, SDN controllers determine that first data flow is moved to the second interface of the MN from the first interface of the MN according to second bearer messages；

In the present embodiment, second bearer messages include the identification information of the second interface, and then SDN controllers can determine the second interface for needing to be moved to first data flow into MN from MN first interface according to the identification information of the second interface in the second bearer messages.

Citing is illustrated below, for example shown in Fig. 5, when initial, data flow X and data flow Y is output to the first MAG by MN by interface 1, then data flow X and data flow Y are output to LMA by the first MAG, LMA is that the mailing address prefix of data flow X distribution is pref 1, and the mailing address prefix for being data flow Y distribution is pref2.The flow table item forwarded to data flow X and data flow Y is preserved in first MAG respectively, the mailing address prefix that the corresponding flow table items of data flow X have is prefl, and the mailing address prefix that the corresponding flow table items of data flow Y have is pref2.

At a time, SDN controllers obtain the first MAG load information, when it is determined that the first MAG load information is more than or equal to preset load wealthy value, it is determined that needing data flow Y entering line interface transfer.SDN controllers obtain the MN corresponding MAG of other interfaces load information, most lightly loaded is obtained from other MAG according to MN position or load is used as the 2nd MAG less than the MAG for loading wealthy value, 2nd MAG corresponding interfaces 2, such SDN controllers, which have been determined that, to be needed data flow Y being transferred to interface 2 from interface 1.Due to interface 2 to have turned on state, now MN by interface 2 without being registered in network, and the 2nd MAG directly sends the first bearer messages to SDN controllers, and the first carrying disappears --breath includes the identification information of second interface, and such SDN controllers, which have been determined that, to be needed data flow Y being transferred to second interface.

1607th, SDN controllers judge the MAG included in the first path where the MAG and the first interface that are included in second path not for same equipment；

In actual applications, due to defining multiple MAG condition, provided according to agreement, for a MN, the MN each interface one MAG equipment of correspondence, for example, MN 1 has three interfaces, interface A, interface B and interface C, now interface A corresponds to MAG A, interface B correspondence MAG B MAG Cs corresponding with interface C, specifically in the present embodiment, and judged result one is set to the first path with MAG in second path to be same, first path includes the first MAG, and the second path includes the 2nd MAG.

1608th, SDN controllers determine that the 2nd MAG is to need to receive the network element device that flow table item adjusts message in LMA and second path；

In actual applications, transmitted because the first data flow is moved in the second path, so the 2nd MAG and LMA in the second path does not forward the flow table item of the first data flow, so determining that the 2nd MAG is to need to receive the network element device that flow table item adjusts message in LMA and the second path.

1609th, SDN controllers send the second flow table item adjustment message to the 2nd MAG；

In the present embodiment, the second flow table item adjustment message is used to indicate that the 2nd MAG increases by the second flow table item, and the content of second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of second occurrence：The first data flow in flow table item is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of second flow table item adjustment message also includes：3rd occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of 3rd occurrence：The next-hop of the first data flow in flow table item is set to second interface.

1610th, SDN controllers send the 3rd flow table item adjustment message to the LMA.

In the present embodiment, the 3rd flow table item adjustment message is used to indicate that the flow table item in the LMA is revised as the 3rd flow table item by the LMA, and the content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；The corresponding flow table operation of 4th occurrence：The first data flow in flow table item is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

It should be noted that, in the present embodiment, mailing address prefix corresponding to each data flow is different, as shown in Figure 5, data flow X mailing address prefix is prefl, data flow Y mailing address prefix is pref2, and when a certain stream compression moves on to other paths and is transmitted, its mailing address prefix keeps constant. --in addition, after the second flow table item adjustment message is sent to the 2nd MAG and the 3rd flow table item adjustment message is sent to LMA, SDN controllers can also determine whether LMA and the 2nd MAG have adjusted flow table item, if, then the mailing address prefix of the first data flow is encapsulated in router advertisement RA message, RA message is then sent to by MN by the 2nd MAG.

In the present embodiment, when there is multiple MAG, SDN controllers can be the 2nd MAG of MN selections by the first MAG load state information and MN position, and determine that first data flow is moved to the second interface of the MN from the first interface of the MN according to the 2nd MAG the second bearer messages sent, then SDN controllers determine that the 2nd MAG is to need to receive the network element device that flow table item adjusts message in LMA and second path, and send the second flow table item adjustment message to the 2nd MAG, the 3rd flow table item adjustment message is sent to the LMA, so that the first data flow is sent to LMA from MN second interface via the 2nd MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

Refer to Figure 17, in the present embodiment, there are multiple MAG equipment in network, the multiple MAG equipment includes the first MAG and the 2nd MAG, when initial, second interface is non-opening, accordingly, the trigger condition of the present embodiment data flow transfer is to open the second interface do not opened, and the method that data flow is moved in the present embodiment includes：

1701st, when the MN opens the second interface do not opened, the SDN controllers receive the 3rd bearer messages from the 2nd MAG；

In the present embodiment, the first path of first interface the first data flow of correspondence, the second path of second interface the first data flow of correspondence, first data flow is transmitted by first path when initial.

Due to it is initial when, MN second interface is non-opening, after MN opens the second interface do not opened, the movement of trigger data stream, MN sends L2 layers of attach request to the 2nd MAG after switching, and to ask the 2nd MAG that MN second interface is accessed into the 2nd MAG, the 2nd MAG receives the L2 layer attach requests of MN transmissions, L2 layers of attach request are encapsulated in the 3rd bearer messages, the 3rd bearer messages are then sent to SDN controllers.

1702nd, SDN controllers determine to need to be moved to the first data flow into MN second interface from MN first interface according to the 3rd bearer messages；

1703rd, SDN controllers judge the MAG included in the first path where the MAG and the first interface that are included in second path for same equipment； In-- the present embodiment, SDN controllers may determine that whether the MAG included in second path is same equipment with the MAG included in the first path where the first interface, because the present embodiment is on the premise of with multiple MAG equipment, so judged result one is set to the MAG and MAG that second path is included that first path includes and is same equipment, first path includes the first MAG, second path includes the 2nd MAG, then performs step 1704.

1704th, SDN controllers determine that LMA and the 2nd MAG are to need to receive the network element device that flow table item adjusts message；

Because MN second interface to be new opens interface, so also not setting up tunnel between the 2nd MAG and LMA in the second path, it is necessary to first pass through step 1705 and 1706 first set up tunnel.

1705th, SDN controllers send the first tunnel building message to LMA；

First tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that LMA is set up between LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between LMA and the 2nd MAG.

1706th, SDN controllers send the second tunnel building message to the 2nd MAG；

Second tunnel building message is used for the tunnel interface for the 2nd MAG sides for indicating the tunnel that the 2nd MAG is set up between LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between LMA and the 2nd MAG.

1707th, SDN controllers send the second flow table item adjustment message to the 2nd MAG, and the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to the second flow table item increases by the second flow table item；The content of second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of the second flow table item adjustment message also includes：3rd occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface.

1708th, SDN controllers send the 3rd flow table item adjustment message to LMA, and the 3rd flow table item adjustment message is used to indicate that the flow table item in LMA is revised as the 3rd flow table item by LMA according to the content of the 3rd flow table item adjustment message；

The content of 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

It should be noted that in the present embodiment, the mailing address prefix corresponding to each data flow is different, such as Shown in-- Fig. 5, data flow X mailing address prefix is prefl, and data flow Y mailing address prefix is pref2, and when a certain stream compression moves on to other paths and is transmitted, its mailing address prefix keeps constant.

In addition, after the second flow table item adjustment message is sent to the 2nd MAG and the 3rd flow table item adjustment message is sent to LMA, SDN controllers can also determine whether LMA and the 2nd MAG have adjusted flow table item, if, then the mailing address prefix of the first data flow is encapsulated in router advertisement RA message, RA message is then sent to by MN by the 2nd MAG

It should be noted that, in the embodiment of the present invention MAG equipment have it is multiple in the case of, after the movement of first data flow, also include the related flow table item of the first data flow in MAG where before the movement of first data flow, now SDN controllers can be sent in the MAG where before flow table entry deletion message is moved to the first data flow, the flow table entry deletion message is used to indicate that the MAG deletes the related flow table item of the first data flow, or the MAG within the defined time when not having using the related flow table item of the first data flow, delete the related flow table item of first data flow.

In the present embodiment, when there is multiple MAG, after SDN controllers determine that the 2nd MAG in LMA and second path is the network element device for needing to receive flow table item adjustment message, SDN controllers send the first tunnel building message to the LMA, and send the second tunnel building message to the 2nd MAG, so as to the tunnel set up between LMA and the 2nd MAG, then message is adjusted by sending the second flow table item to the 2nd MAG, the second flow table item adjustment message is sent to the 2nd MAG, so that the first data flow is sent to LMA from second interface via the 2nd MAG, negotiation without carrying out data flow movement between network element device, and compared with prior art, network element device MAG can be operated according to the instruction of SDN controllers, so network element device MAG goes for arbitrary IP agreement, and then cost has been saved in networking.

In addition it should be noted that, device embodiment described above is only schematical, wherein the part of making can be or may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Some or all of module therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.In addition, in the device embodiment accompanying drawing that the present invention is provided, the annexation between module represents there is communication connection between them, specifically can be implemented as one or more communication bus or signal wire.Those of ordinary skill in the art are without creative efforts, you can to understand and implement.

Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can add the mode of required common hardware to realize by software, naturally it is also possible to included by specialized hardware --application specific integrated circuit, dedicated cpu, private memory, special components and parts etc. are realized.Generally, all functions of being completed by computer program can be realized easily with corresponding hardware, moreover, can also be diversified for the particular hardware structure for realizing same function, such as analog circuit, digital circuit or special circuit.But, it is more for the purpose of the present invention in the case of software program realize it is more preferably embodiment.Understood based on such, the part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, the computer software product is stored in the storage medium that can be read, such as the floppy disk of computer, USB flash disk, mobile hard disk, read-only storage（ROM, Read-Only Memory), arbitrary access deposit 4 all devices（RAM, Random Access Memory), magnetic disc or CD etc., including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform the method described in each embodiment of the invention.

Method, network system and the SDN controllers of a kind of data flow movement provided above the embodiment of the present invention are described in detail, for those of ordinary skill in the art, thought according to the embodiment of the present invention, it will change in specific embodiments and applications, therefore, this specification content should not be construed as limiting the invention.

Claims

Claim

1st, the self-defined network SDN controllers of a kind of software, it is characterised in that the SDN controllers include：

First determining unit, for determining to need to be moved to the first data flow into the second interface of the MN from the first interface of mobile node MN, the first path of the first interface correspondence first data flow, second path of the second interface correspondence first data flow, and judge whether the Mobile Access Gateway MAG included in second path is same equipment with the MAG included in the first path；

Second determining unit, determines in the network element device in second path to need to receive the network element device that flow table item adjusts message for the judged result according to first determining unit；

First transmitting element, the network element device that flow table item adjustment message is received the need for for being determined to second determining unit sends the flow table item adjustment message, and the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

2nd, SDN controllers according to claim 1, it is characterised in that the flow table item adjustment message is additionally operable to indicate the flow table item that the network element device is adjusted according to the flow table item in the content adjustment network element device of message.

3rd, SDN controllers according to claim 2, it is characterized in that, second determining unit specifically for, it is that the MAG that the MAG that the first path is included is included with second path is same equipment in the judged result, when the same equipment is a MAG, it is to need to receive the network element device that flow table item adjusts message to determine the first MAG；

First transmitting element specifically for, the first flow table item adjustment message is sent to the first MAG, the first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of first flow table item adjustment message；

The content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface.

4th, SDN controllers according to claim 2, it is characterized in that, second determining unit specifically for, the MAG included in the MAG and second path included during the judged result is the first path is not same equipment, the first MAG is included in the first path, when including two MAG in second path, it is to need to receive the network element device that the flow table item adjusts message to determine local mobility anchor fixed point LMA and the 2nd MAG；

First transmitting element includes： First transmission sub-unit, for sending the second flow table item adjustment message to the 2nd MAG, the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to second flow table item increases by the second flow table item；

Second transmission sub-unit, for sending the 3rd flow table item adjustment message to the LMA, the 3rd flow table item adjustment message is used to indicate that the flow table item in the LMA is revised as the 3rd flow table item by the LMA according to the content of the 3rd flow table item adjustment message；

The content of the second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of the second flow table item adjustment message also includes：3rd matching preceding paragraph：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface；

The content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

5th, SDN controllers according to claim 4, it is characterized in that, first determining unit is additionally operable to, before it is determined that needing the first data flow being moved to the second interface of the MN from the first interface of mobile node MN, determine that the 2nd MAG described in the second path and LMA does not set up tunnel；

The SDN controllers also include：

Second transmitting element, for sending the first tunnel building message to the LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that the LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG；And

3rd transmitting element, for sending the second tunnel building message to the 2nd MAG, the second tunnel building message is used for the tunnel interface for indicating the 2nd MAG sides in the tunnel that the 2nd MAG is set up between the LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG.

6th, the SDN controllers according to claim 4 or 5, it is characterised in that the SDN controllers also include：

3rd determining unit, for determining that the LMA and the 2nd MAG has adjusted flow table item； Encapsulation unit, for the mailing address prefix of first data flow to be encapsulated in router advertisement RA message；

4th transmitting element, for the RA message to be sent into the MN by the 2nd MAG.

7th, the SDN controllers according to claim 4 to 6 any one, it is characterised in that first determining unit includes：

Obtain subelement, the load information for obtaining corresponding first MAG of the first interface；First determination subelement, for determining that the load of the first MAG is more than or equal to the preset wealthy value of load according to the load information；

The acquisition subelement is additionally operable to, and obtains the corresponding MAG of other interfaces of MN load information；

First determining unit also includes：

Select subelement, the corresponding MAG of other interfaces load information and the position of the MN for being got according to the acquisition subelement are that the MN selects the 2nd MAG from the corresponding MAG of other described interfaces, and the 2nd MAG is corresponding with the second interface.

8th, SDN controllers according to claim 3, it is characterised in that first determining unit includes：

Second determination subelement, for determining that the second interface is to have turned on state；

First receiving subelement, for receiving the first bearer messages that the first MAG is sent, first bearer messages include the identification information of the second interface；

3rd determination subelement, for determining the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to first bearer messages.

9th, SDN controllers according to claim 4, it is characterised in that first determining unit includes：

4th determination subelement, for determining that the second interface is to have turned on state；

Second receiving subelement, for receiving the second bearer messages that the 2nd MAG is sent, second bearer messages include the identification information of the second interface；

5th determination subelement, for determining the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to second bearer messages.

10th, SDN controllers according to claim 4, it is characterised in that first determining unit includes： 6th determination subelement, for determining that the MN opens the second interface do not opened；3rd receiving subelement, for receiving the L2 layer attach requests for including the MN in the 3rd bearer messages, the 3rd bearer messages from the 2nd MAG；

7th determination subelement, for being determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 3rd bearer messages；Or

4th receiving subelement, the L2 layer attach requests of the MN are included for when the MN has more than two interfaces, being received from the corresponding MAG of an interface of the MN in the 4th bearer messages, the 4th bearer messages；

8th determination subelement, for being determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 4th bearer messages.

11st, SDN controllers according to claim 3, it is characterised in that first determining unit includes：

9th determination subelement, for determining that the MN opens the second interface do not opened；5th receiving subelement, for receiving the 5th bearer messages from the first MAG；

Tenth determination subelement, for being determined to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 5th bearer messages；

The L2 layer attach requests of the MN are included in 5th bearer messages, the L2 layers attach request of the MN is used for MN requests and is linked into the first MAG by the second interface.

12-kind of network system, it is characterised in that the system includes：The self-defined network SDN controllers of mobile node MN, software and at least one Mobile Access Gateway MAG;

The SDN controllers, for determining to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN, the first path of the first interface correspondence first data flow, second path of the second interface correspondence first data flow, and judge what is included in second path

Whether MAG is same equipment with the MAG included in the first path；

The SDN controllers, are additionally operable to be determined to need to receive the network element device that the flow table item sent by the SDN controllers adjusts message in the network element device in second path according to judged result；

The SDN controllers, the network element device for being additionally operable to receive flow table item adjustment message the need for the determination sends the flow table item adjustment message, and the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

13rd, system according to claim 12, it is characterised in that the flow table item adjustment message is also For indicating that the network element device adjusts the flow table item in the content adjustment network element device of message according to the flow table item.

14th, system according to claim 13, it is characterised in that the first MAG is included at least one described MAG;

The SDN controllers, specifically for being that the MAG that the MAG that the first path is included is included with second path is same equipment in the judged result, when the same equipment is a MAG, the first MAG is determined to need to receive the network element device that flow table item adjusts message is sent by the SDN controllers；

The SDN controllers, specifically for sending the first flow table item adjustment message to the first MAG, the first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of first flow table item adjustment message, and the content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface.

15th, system according to claim 13, it is characterised in that the system also includes：Local mobility anchor, which is pinpointed, includes the first MAG and the 2nd MAG in LMA, at least one described MAG;

The SDN controllers, it is not same equipment specifically for the MAG included in being the first path in the judged result and the MAG included in second path, the first MAG is included in the first path, when including two MAG in second path, it is to need to receive the network element device that the flow table item adjusts message to determine the LMA and the 2nd MAG；

The SDN controllers, specifically for sending the second flow table item adjustment message to the 2nd MAG so that the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to second flow table item increases by the second flow table item；

The SDN controllers, it is additionally operable to send the 3rd flow table item adjustment message to the LMA, the 3rd flow table item adjustment message is used to indicate that the flow table item in the LMA is revised as the 3rd flow table item by the LMA according to the content of the 3rd flow table item adjustment message；

The content of the second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of the second flow table item adjustment message also includes：3rd occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface； The content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

16th, system according to claim 15, it is characterised in that：

The SDN controllers, are additionally operable to determine that the 2nd MAG described in the second path and LMA does not set up tunnel before it is determined that needing first data flow being moved to the second interface of the MN from the first interface of the MN；

The SDN controllers, it is additionally operable to send the first tunnel building message to the LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that the LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG；

The SDN controllers, it is additionally operable to send the second tunnel building message to the 2nd MAG, the second tunnel building message is used for the tunnel interface for indicating the 2nd MAG sides in the tunnel that the 2nd MAG is set up between the LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG.

17th, the system according to claim 15 or 16, it is characterised in that

The SDN controllers, it is additionally operable to after the flow table item adjustment message is sent to the network element device of determination, determine that the LMA and the 2nd MAG has adjusted flow table item, and the mailing address prefix of first data flow is encapsulated in router advertisement RA message, the RA message is sent to the MN by the 2nd MAG.

18th, the system according to any one of claim 15 to 17, it is characterised in that

The SDN controllers, it is additionally operable to obtain corresponding first MAG of first interface load information, the load for determining the first MAG according to the load information is more than or equal to the preset wealthy value of load, obtain the corresponding MAG of other interfaces of MN load information, and be that the MN selects the 2nd MAG from the corresponding MAG of other described interfaces according to the acquired corresponding MAG of other interfaces load information and the position of the MN, the 2nd MAG is corresponding with the second interface.

19th, system according to claim 14, it is characterised in that

The SDN controllers, are additionally operable to determine the second interface to have turned on state；

The SDN controllers, are additionally operable to receive the first bearer messages that the first MAG is sent, first bearer messages include the identification information of the second interface, need are determined according to first bearer messages First data flow is moved to the second interface of the MN from the first interface of the MN.

20th, system according to claim 15, it is characterised in that

The SDN controllers, are additionally operable to determine the second interface to have turned on state；

The SDN controllers, it is additionally operable to receive the second bearer messages that the 2nd MAG is sent, second bearer messages include the identification information of the second interface, and the second interface for needing to be moved to first data flow into the MN from the first interface of the MN is determined according to second bearer messages.

21st, system according to claim 15, it is characterised in that

The SDN controllers, are additionally operable to determine that the MN opens the second interface do not opened；The SDN controllers, it is additionally operable to receive the 3rd bearer messages from the 2nd MAG, the L2 layer attach requests of the MN are included in 3rd bearer messages, and need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 3rd bearer messages determination；Or when the MN has more than two interfaces, the SDN controllers are additionally operable to, the 4th bearer messages are received from the corresponding MAG of an interface of the MN, the L2 layer attach requests of the MN are included in 4th bearer messages, the SDN controllers determine to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 4th bearer messages.

22nd, system according to claim 14, it is characterised in that

The SDN controllers, are additionally operable to determine that the MN opens the second interface do not opened；The SDN controllers, are additionally operable to receive the 5th bearer messages from the first MAG, and need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 5th bearer messages determination；

The L2 layer attach requests of the MN are included in 5th bearer messages, the L2 layers attach request of the MN is used for MN requests and is linked into the first MAG by the second interface.

23rd, the self-defined network SDN controllers of a kind of software, it is characterised in that including：

Processor, for determining to need to be moved to the first data flow into the second interface of the MN from the first interface of mobile node MN, the first path of the first interface correspondence first data flow, second path of the second interface correspondence first data flow, and judge whether the MAG included in the Mobile Access Gateway MAG included in second path and the first path is same equipment, the network element device for needing to receive flow table item adjustment message is determined in the network element device in second path according to the judged result of the judgement；

Transmitter, for the processor determine the need for receive flow table item adjustment message network element device send out The flow table item adjustment message is sent, the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

24th, SDN controllers according to claim 23, it is characterised in that the flow table item adjustment message is additionally operable to indicate the flow table item that the network element device is adjusted according to the flow table item in the content adjustment network element device of message.

25th, a kind of method of data flow movement, it is characterised in that methods described includes：

SDN controllers determine to need to be moved to the first data flow into the second interface of the MN from the first interface of mobile node MN, the first path of the first interface correspondence first data flow, second path of the second interface correspondence first data flow, and judge whether the Mobile Access Gateway MAG included in second path is same equipment with the MAG included in the first path；

The SDN controllers determine that the flow table item for needing reception to be sent by the SDN controllers adjusts the network element device of message according to judged result in the network element device in second path；

The SDN controllers send the flow table item to the network element device that flow table item adjustment message is received the need for the determination and adjust message, and the flow table item adjustment message is used to indicate first data flow is moved into second path transmission from the first path.

26th, method according to claim 25, the flow table item adjustment message is additionally operable to indicate the flow table item that the network element device is adjusted according to the flow table item in the content adjustment network element device of message.

27th, method according to claim 26, characterized in that, the SDN controllers determine that the network element device for needing reception to send flow table item adjustment message by the SDN controllers is specifically included according to judged result in the network element device in second path：

If the MAG that the MAG that the judged result, which is the first path, to be included is included with second path is same equipment, the same equipment is the first MAG, and the SDN controllers determine the first MAG and send the network element device that flow table item adjusts message by the SDN controllers to need to receive；The SDN controllers send the flow table item adjustment message to the network element device that flow table item adjustment message is received the need for the determination：

The SDN controllers send the first flow table item adjustment message to the first MAG, and the first flow table item adjustment message is used to indicate that the flow table item in the first MAG is revised as the first flow table item by the first MAG according to the content of first flow table item adjustment message；

The content of the first flow table item adjustment message includes：First occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface. 28th, method according to claim 26, characterized in that, the SDN controllers determine that the network element device for needing reception to send flow table item adjustment message by the SDN controllers is specifically included according to judged result in the network element device in second path：

If the judged result is the MAG included in the first path and the MAG included in second path is not same equipment, the first MAG is included in the first path, the 2nd MAG is included in second path, then the SDN controllers determine that local mobility anchor fixed point LMA and the 2nd MAG is to need to receive the network element device that the flow table item adjusts message；

The SDN controllers need the network element device transmission flow table item adjustment message for receiving flow table item adjustment message to specifically include to the determination：

The SDN controllers send the second flow table item adjustment message to the 2nd MAG, and the second flow table item adjustment message is used to indicate that the content that the 2nd MAG adjusts message according to second flow table item increases by the second flow table item；And

The SDN controllers send the 3rd flow table item adjustment message to the LMA, and the 3rd flow table item adjustment message is used to indicate that the flow table item in the LMA is revised as the 3rd flow table item by the LMA according to the content of the 3rd flow table item adjustment message；

The content of the second flow table item adjustment message includes：Second occurrence：Source address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd；And the content of the second flow table item adjustment message also includes：3rd occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：The next-hop of first data flow is set to second interface；

The content of the 3rd flow table item adjustment message includes：4th occurrence：Destination address prefix is the mailing address prefix of the first data flow；Flow table is operated：First data flow is forwarded from the MAG tunnel interfaces of LMA- the 2nd.

29th, method according to claim 28, it is characterised in that before the SDN controllers determine to need the first data flow being moved to the second interface of the MN from the first interface of the MN, methods described also includes：

The SDN controllers determine that the 2nd MAG and LMA does not set up tunnel；The SDN controllers send the first tunnel building message to the LMA, the first tunnel building message is used for the tunnel interface for indicating the LMA sides in the tunnel that the LMA is set up between the LMA and the 2nd MAG, and the first tunnel building message includes：Set up the LMA with it is described The tunnel configuration message in the tunnel between the 2nd MAG；

The SDN controllers send the second tunnel building message to the 2nd MAG, the second tunnel building message is used for the tunnel interface for indicating the 2nd MAG sides in the tunnel that the 2nd MAG is set up between the LMA and the 2nd MAG, and the second tunnel building message includes：The tunnel configuration message in the tunnel set up between the LMA and the 2nd MAG.

30th, the method according to claim 28 or 29, it is characterised in that the SDN controllers are sent after the flow table item adjusts message to the network element device of determination also to be included：

The SDN controllers determine that the LMA and the 2nd MAG has adjusted flow table item；The mailing address prefix of first data flow is encapsulated in router advertisement RA message by the SDN controllers, and the RA message is sent into the MN by the 2nd MAG.

31st, the method according to claim 28 to 30 any claim, it is characterised in that the SDN controllers determine to need the second interface that first data flow is moved into the MN from the first interface of the MN to specifically include：

The SDN controllers obtain corresponding first MAG of first interface load information；The SDN controllers determine that the load of the first MAG is more than or equal to the preset wealthy value of load according to the load information；

The SDN controllers obtain the corresponding MAG of other interfaces of MN load information, and be that the MN selects the 2nd MAG from the corresponding MAG of other described interfaces according to the acquired corresponding MAG of other interfaces load information and the position of the MN, the 2nd MAG is corresponding with the second interface.

32nd, method according to claim 27, it is characterised in that the SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include：The SDN controllers determine the second interface to have turned on state；

The SDN controllers receive the first bearer messages that the first MAG is sent, and first bearer messages include the identification information of the second interface；

The SDN controllers determine the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to first bearer messages.

33rd, method according to claim 28, it is characterised in that the SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include：The SDN controllers determine the second interface to have turned on state； The SDN controllers receive the second bearer messages that the 2nd MAG is sent, and second bearer messages include the identification information of the second interface；

The SDN controllers determine the second interface for needing to be moved to first data flow into the MN from the first interface of the MN according to second bearer messages.

34th, method according to claim 28, it is characterised in that the SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include：The SDN controllers determine that the MN opens the second interface do not opened；

The SDN controllers receive the 3rd bearer messages from the 2nd MAG, the L2 layer attach requests of the MN are included in 3rd bearer messages, and need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 3rd bearer messages determination；Or

When the MN has more than two interfaces, the SDN controllers receive the 4th bearer messages from the corresponding MAG of an interface of the MN, the L2 layer attach requests of the MN are included in 4th bearer messages, the SDN controllers determine to need to be moved to the first data flow into the second interface of the MN from the first interface of the MN according to the 4th bearer messages.

35th, the method stated according to claim 27, it is characterised in that SDN controllers determine to need the second interface that the first data flow is moved into the MN from the first interface of the MN to specifically include：

The SDN controllers determine that the MN opens the second interface do not opened；

The SDN controllers receive the 5th bearer messages from the first MAG, and determine that the first data flow is moved to the second interface of the MN from the first interface of the MN according to the 5th bearer messages；The L2 layer attach requests of the MN are included in 5th bearer messages, the L2 layers attach request of the MN is used to ask to be linked into the first MAG by the second interface.