On PMIPv6-Based Mobility Support for Hierarchical P2P-SIP Architecture in Intelligent Transportation System

Network Service providers have many worries about providing network services with an expandable, reliable, flexible and low-cost structure according to the expanding market environment. The current client-server system has various problems such as complexity and high costs in providing network services. On the contrary to this, this problem can be simply solved, if the Peer-to-Peer (P2P) communication terminal supporting access of distributed resources provides functions which the current Session Initiation Protocol (SIP) -based network devices have. Because diverse terminals in a network access through networks, also, partitioning network domains with gateways to manage, and applying the Proxy Mobile IPv6 (PMIPv6) technology considering mobility of terminals would help to have a more efficient network structure. Especially, the proposed P2P-SIP structure proves itself as a very efficient structure to have an outstanding expandability among different networks in a region, and to reduce maintenance costs.