U.S.Patent Apr.9,2019 Sheet 9 of 10 US10,257,802B2 1601 After an SDN controller receives a bearer message sent by a MAG,an LMA receives a message that is sent by the SDN controller and for establishing a tunnel between the MAG and the LMA,and completes establishment of the tunnel on the LMA side according to the message for establishing a tunnel between the MAG and the LMA 1602 The LMA receives a message that is sent by the SDN controller and for adjusting a flow entry of an MN,and adjusts,according to the message for adjusting a flow entry of the MN,a flow entry that is of the MN and stored in the LMA FIG.16
U . S . Patent Apr . 9 , 2019 Sheet 9 of 10 US 10 , 257 , 802 B2 1601 After an SDN controller receives a bearer message sent by a MAG , an LMA receives a message that is sent by the SDN controller and for establishing a tunnel between the MAG and the LMA , and completes establishment of the tunnel on the LMA side according to the message for establishing a tunnel between the MAG and the LMA 1602 The LMA receives a message that is sent by the SDN controller and for adjusting a flow entry of an MN , and adjusts , according to the message for adjusting a flow entry of the MN , a flow entry that is of the MN and stored in the LMA FIG . 16
U.S.Patent Apr.9,2019 Sheet 10 of 10 US10,257,802B2 1701 After an SDN controller receives a bearer message sent by a MAG,an LMA receives a message that is sent by the SDN controller and for establishing a tunnel between the MAG and the LMA,and establishes a tumel interface on the LMA side according to the message for establishing a tumnnel between the MAG and the LMA 1702 The LMA receives a message that is sent by the SDN controller ad for adjusting a flow entry of an MN,and adds a second flow entry of the MN according to the message for adjusting a flow entry of the MN 1703 The LMA receives packet data from a network after establishment of the tumel between the MAG and the LMA succeeds and the MN receives an RA message to register with the network 1704 The LMA matches a Matching destination address prefix included in the fails packet data with a third matching entry in the second flow entry in the LMA Matching succeeds 1705 The LMA forwards the packet data to the MAG through the tunnel between the MAG and the LMA according to the second flow entry,so that the MAG forwards the packet data to the MN according to a first flow entry in the MAG Forwarding fails FIG.17
U . S . Patent Apr . 9 , 2019 Sheet 10 of 10 US 10 , 257 , 802 B2 1701 After an SDN controller receives a bearer message sent by a MAG , an LMA receives a message that is sent by the SDN controller and for establishing a tunnel between the MAG and the LMA , and establishes a tunnel interface on the LMA side according to the message for establishing a tunnel between the MAG and the LMA 1702 The LMA receives a message that is sent by the SDN controller and for adjusting a flow entry of an MN , and adds a second flow entry of the MN according to the message for adjusting a flow entry of the MN 1703 The LMA receives packet data from a network after establishment of the tumel between the MAG and the LMA succeeds and the MN receives an RA message to register with the network 1704 Matching fails The LMA matches a destination address prefix included in the packet data with a third matching entry in the second flow entry in the LMA Matching succeeds 1705 The LMA forwards the packet data to the MAG through the tunnel between the MAG and the LMA according to the second flow entry , so that the MAG forwards the packet data to the MN according to a first flow entry in the MAG Forwarding fails FIG . 17
US10.,257,802B2 2 BINDING REGISTRATION METHOD,DATA form plenty of signaling negotiation and interworking.con- FORWARDING METHOD.RELATED trol functions are very complex.Especially when the mobile DEVICE,AND NETWORK SYSTEM node moves frequently,the LMA and different MAGs need to perform more frequent and complex signaling interwork- CROSS-REFERENCE TO RELATED 5 ing.In addition,the network element devices LMA and APPLICATIONS MAG are applicable only to the Proxy Mobile IPv6 protocol. and if the protocol is changed,the network element devices This application is a continuation of International Appli- accordingly need to be changed,causing a huge waste in cation No.PCT/CN2014/078310,filed on May 23,2014,the network construction. disclosure of which is hereby incorporated by reference in 10 its entirety. SUMMARY STATEMENT OF JOINT RESEARCH Embodiments of the present invention provide a binding AGREEMENT registration method,a data forwarding method,a related 15 device,and a network system,which resolves a problem in The subject matter and the claimed invention were made the Proxy Mobile IPv6 protocol that because a network by or on the behalf of University of Science and Technology element device performs plenty of signaling negotiation and of China,of No.96,JinZhai Road,Baohe District,Hefei interworking,a control function is complex,and resolves a City,Anhui Province,P.R.China and Huawei Technologies problem of a waste in network construction resulted from a Co.,Ltd.,of Shenzhen,Guangdong Province,P.R.China, 20 change of the network element device that is caused by a under a joint research agreement titled"Research and Devel- protocol change. opment of Next Generation Video Coding Standards and A first aspect of the embodiments of the present invention Technologies".The joint research agreement was in effect provides a software defined networking SDN controller. on or before the claimed invention was made,and that the including: claimed invention was made as a result of activities under- 25 a first receiving unit,configured to receive a first bearer taken within the scope of the joint research agreement. message that is forwarded by a first MAG in multiple mobile access gateways MAGs and that carries a first TECHNICAL FIELD data link layer L2 attach request message,so that a mobile node requests to register with a network,where The present invention relates to the communications field,30 the first L2 attach request message is sent by the mobile and in particular,to a binding registration method,a data node to the first MAG to request to access the first forwarding method,a related device,and a network system. MAG,and the first L2 attach request message includes an ID of the mobile node; BACKGROUND a first sending unit,configured to send,to each of the first 35 MAG and an LMA,a message for establishing a tunnel The Proxy Mobile IPv6 protocol provides network side- between the first MAG and the local mobility anchor based mobility management support for a mobile node LMA,to establish the tunnel between the first MAG (MN),and does not require participation of the mobile node and the LMA: in signaling interworking related to mobility management, a second sending unit,configured to send,to each of the so that a user-side protocol stack does not need to be 40 first MAG and the LMA,a message for adjusting a flow complexly extended.In the Proxy Mobile IPv6 protocol,a entry of the mobile node; network layer is extended by adding two core functional a configuration and encapsulation unit,configured to: entities,which are a local mobility anchor (LMA)and a when establishment of the tunnel between the first mobile access gateway(MAG).The LMA is responsible for MAG and the LMA succeeds,configure HNP(s)for the maintaining a reachable status of the mobile node and 45 mobile node,and encapsulate the HNP(s)into a router allocating a home network prefix of the mobile node.The advertisement message;and MAG is located on a link to which the mobile node is a third sending unit,configured to send the router adver- anchored,and performs mobility management in place of tisement message to the first MAG,so that the mobile the mobile node and completes binding registration with the node is registered with the network when the mobile LMA in place of the mobile node. 50 node receives the router advertisement message from In an existing PMIPv6 mobility management solution. the first MAG when the mobile node performs initial access,the mobile With reference to the first aspect of the embodiments of node first requests to be attached to a network.The MAG to the present invention,in a first implementation manner of which the mobile node is currently anchored acquires a the first aspect,the first sending unit is configured to send a mobile node identification (MN-ID)of the mobile node,and 55 first establishment message to the first MAG,where the first then the MAG sends the LMA a Proxy Binding Update establishment message is used to instruct the first MAG to (PBU)message that carries the MN-ID.After receiving the establish a tunnel interface on the first MAG side,and the PBU message,the LMA returns,to the MAG,a Proxy first establishment message includes configuration informa- Binding Acknowledgement(PBA)that carries a home net- tion for establishing the tunnel interface on the first MAG work prefix (HNP)of the mobile node.and then the LMA 60 side: negotiates with the MAG to establish a bidirectional tunnel the first sending unit is further configured to send a second Subsequently,the MAG announces,to the mobile node on establishment message to the LMA,where the second an access link,a router advertisement (RA)message that establishment message is used to instruct the LMA to carries the HNP(s)of the mobile node,to complete a binding establish a tunnel interface on the LMA side,and the registration process. 65 second establishment message includes configuration In the existing PMIPv6 mobility management solution information for establishing the tunnel interface on the because the network element devices LMA and MAG per- LMA side:
US 10 , 257 , 802 B2 BINDING REGISTRATION METHOD , DATA form plenty of signaling negotiation and interworking , con FORWARDING METHOD , RELATED trol functions are very complex . Especially when the mobile DEVICE , AND NETWORK SYSTEM node moves frequently , the LMA and different MAGs need to perform more frequent and complex signaling interwork CROSS - REFERENCE TO RELATED 5 ing . In addition , the network element devices LMA and APPLICATIONS MAG are applicable only to the Proxy Mobile IPv6 protocol , and if the protocol is changed , the network element devices This application is a continuation of International Appli - accordingly need to be changed , causing a huge waste in cation No . PCT / CN2014 / 078310 , filed on May 23 , 2014 , the network construction . disclosure of which is hereby incorporated by reference in 10 its entirety . SUMMARY 35 STATEMENT OF JOINT RESEARCH Embodiments of the present invention provide a binding registration method , a data forwarding method , a related 15 device , and a network system , which resolves a problem in The subject matter and the claimed invention were made the Proxy Mobile IPv6 protocol that because a network by or on the behalf of University of Science and Technology element device performs plenty of signaling negotiation and of China , of No . 96 . JinZhai Road , Baohe District . Hefei interworking , a control function is complex , and resolves a City , Anhui Province , P . R . China and Huawei Technologies problem of a waste in network construction resulted from a Co . , Ltd . , of Shenzhen , Guangdong Province , P . R . China , 20 change of the network element device that is caused by a under a joint research agreement titled “ Research and Devel - protocol change . opment of Next Generation Video Coding Standards and first aspect of the embodiments of the present invention Technologies ” . The joint research agreement was in effect provides a software defined networking SDN controller , on or before the claimed invention was made , and that the including : claimed invention was made as a result of activities under - 25 a first receiving unit , configured to receive a first bearer taken within the scope of the joint research agreement . message that is forwarded by a first MAG in multiple mobile access gateways MAGs and that carries a first TECHNICAL FIELD data link layer L2 attach request message , so that a mobile node requests to register with a network , where The present invention relates to the communications field , 30 the first L2 attach request message is sent by the mobile and in particular , to a binding registration method , a data node to the first MAG to request to access the first forwarding method , a related device , and a network system . MAG , and the first L2 attach request message includes an ID of the mobile node ; BACKGROUND a first sending unit , configured to send , to each of the first MAG and an LMA , a message for establishing a tunnel The Proxy Mobile IPv6 protocol provides network side between the first MAG and the local mobility anchor based mobility management support for a mobile node LMA , to establish the tunnel between the first MAG ( MN ) , and does not require participation of the mobile node and the LMA ; in signaling interworking related to mobility management , a second sending unit , configured to send , to each of the so that a user - side protocol stack does not need to be 40 first MAG and the LMA , a message for adjusting a flow complexly extended . In the Proxy Mobile IPv6 protocol , a entry of the mobile node ; network layer is extended by adding two core functional a configuration and encapsulation unit , configured to : entities , which are a local mobility anchor ( LMA ) and a when establishment of the tunnel between the first mobile access gateway ( MAG ) . The LMA is responsible for MAG and the LMA succeeds , configure HNP ( s ) for the maintaining a reachable status of the mobile node and 45 mobile node , and encapsulate the HNP ( s ) into a router allocating a home network prefix of the mobile node . The advertisement message ; and MAG is located on a link to which the mobile node is a third sending unit , configured to send the router adver anchored , and performs mobility management in place of tisement message to the first MAG , so that the mobile the mobile node and completes binding registration with the node is registered with the network when the mobile LMA in place of the mobile node . 50 node receives the router advertisement message from In an existing PMIPv6 mobility management solution , the first MAG when the mobile node performs initial access , the mobile With reference to the first aspect of the embodiments of node first requests to be attached to a network . The MAG to the present invention , in a first implementation manner of which the mobile node is currently anchored acquires a the first aspect , the first sending unit is configured to send a mobile node identification ( MN - ID ) of the mobile node , and 55 first establishment message to the first MAG , where the first then the MAG sends the LMA a Proxy Binding Update establishment message is used to instruct the first MAG to ( PBU ) message that carries the MN - ID . After receiving the establish a tunnel interface on the first MAG side , and the PBU message , the LMA returns , to the MAG , a Proxy first establishment message includes configuration informa Binding Acknowledgement ( PBA ) that carries a home net - tion for establishing the tunnel interface on the first MAG work prefix ( HNP ) of the mobile node , and then the LMA 60 side ; negotiates with the MAG to establish a bidirectional tunnel . the first sending unit is further configured to send a second Subsequently , the MAG announces , to the mobile node on establishment message to the LMA , where the second an access link , a router advertisement ( RA ) message that establishment message is used to instruct the LMA to carries the HNP ( s ) of the mobile node , to complete a binding establish a tunnel interface on the LMA side , and the registration process . 65 second establishment message includes configuration In the existing PMIPv6 mobility management solution , information for establishing the tunnel interface on the because the network element devices LMA and MAG per LMA side ;