COMMUNICATION METHOD AND COMMUNICATION SYSTEM FOR A NODE WHICH IS ROAMING IN PMIP DOMAINS

摘要

A communication method and communication system for a node which is roaming in PMIP domains is provided, and the method comprises: after the terminal node MN has roamed from the home PMIP domain which support route optimization to the visit PMIP domain which support route optimization, the visit PMIP domain allocates a roaming identification which indicate MN's position in the visit PMIP domain to MN, and binds the roaming identification to MN's home network prefix, and informs the home PMIP domain of the roaming identification, and the home PMIP domain binds MN's home network prefix to the roaming identification; during the transmitting procedure of the first data packet form the opposite node to MN, the home PMIP domain will find the roaming identification according to MN's home network prefix, and the PMIP domain of the opposite node will transmit the first data packet to the Mobile Access Gateway of MN in the visit PMIP domain according to the roaming identification. Said method solves the problem of communication of the node which is roaming in PMIP domains.