Mobile Peer-to-Peer Network Architecture Research And Design

The popularization of intelligent mobile terminals and 3G application environments increasingly sophisticated, has increased the P2P demand on mobile cellular networks and broadband wireless network dramatically. For example, make use of mobile P2P to provide video-on-demand, collaborative sharing, and so on. But the mobile environment with its own characteristics, such as the mobility of node caused by the changes in network topology, the node's own limited resources and capacity, the defects of mobile networks (limited bandwidth, unstable network connectivity) .To bring P2P into the mobile computing environment we have to resolve many key issues, including: peer-to-peer network architecture, resource discovery strategy, covering layer and network layer structure of consistency, data distribution mechanism and energy-saving.In accordance with National 863 project "A Heterogeneous Mobile peer-to-peer network architecture and key technology research," the paper launched a mobile P2P system architecture and system design work. First of all, carried out a detailed analysis of existing mobile P2P network architecture, and researched and analysed of a key technical resource discovery algorithm in detail. On this basis, we propose a hierarchical P2P network architecture which integrated with heterogeneous characteristics of DHT cross-domain, through introducted super-node classification stratified layer management, improved the network scalability in P2P system. Through add the corresponding network function entity DHT can provide cross-domain queries and sharing of resources, in the introduction of super-node in the edge of network, implemented the heterogeneous network interoperability and integration. In addition, the P2P system proposed in this paper combined the SIP technology with the existing DHT algorithm .SIP server functionality is integrated into the P2P node, the system become more universal and scalable.Upon the system design, we implemented a simple prototype system under the conditions of the realization of the laboratory, and based on the system platform we developed a mobile blog application, the successful mobile P2P application has proved the rationality and feasibility of the system.