Patent ID: 9271315
Filing Date: 2016-02-23
CPC Classification: H04L,H04W

Claim Text:
1. A data transmission method based upon a Proxy Mobile Internet Protocol version 6, PMIPv6, comprising: establishing, by a Mobile Access Gateway, MAG, and a Local Mobility Anchor, LMA, a bidirectional tunnel based upon binding of a service flow through interaction of messages after a Mobile Node, MN, initiates the service flow, wherein a downlink Generic Routing Encapsulation, GRE, key and an uplink GRE key are allocated to the service flow and the LMA adds a binding relationship between a service flow identifier of the service flow and address information of the MN during establishment of the bidirectional tunnel; and transmitting, by the MAG and the LMA, a data packet of the service flow initiated by the MN over the bidirectional tunnel according to the service flow identifier, the binding relationship, and the uplink and downlink GRE keys, wherein establishing by the MAG and the LMA the bidirectional tunnel through interaction of messages after the MN initiates the service flow comprises: transmitting, by the MAG, to the LMA a first proxy binding update message instructing to add binding of the service flow upon reception of a first data packet of the service flow initiated by the MN, wherein the first proxy binding update message comprises the service flow identifier generated for the service flow and the downlink GRE key allocated to the service flow; and adding, by the LMA, the binding relationship between the service flow identifier and the address information of the MN according to the received first proxy binding update message and returning to the MAG a first proxy binding acknowledge, ack, message comprising the service flow identifier and the uplink GRE key allocated to the service flow.