A P2P file discovery scheme in NEMO

Abstract

Peer-to-Peer systems become very popular applications in this day. Most P2P systems are based on the wired network environment. But the mobile devices grow up day by day in an enormous rate. Therefore, most current P2P systems have poor performance in the wireless environment. This paper is based on the wireless environment under Network Mobility (NEMO) architecture, proposing one wireless P2P architecture works on NEMO. In order to fulfill the characteristic of the wireless and roaming scenario, a scheme is used to search the location of file or service in the nearby Mobile Network. The proposed approach can avoid tunnel in tunnel problem, unnecessary bandwidth loading and messages passing, and adopting the broadcast in MANET for solving this problem, and expect testing and verify using experiments finally. INTRODUCTION Peer-to-Peer networkP2P file discovery systems can be classified two different architectures: (1) centric and (2) distributed solutions. The famous centric solution applications are Napster and SIP protocol, developed in 1990s. The centric P2P system is traditional client-server architecture. Clients must connect to a centric server which collect each client's information in this system; and register its location and files. On the other hand, when clients request files, they also need to connect to the only one server. One main problem in centric P2P architecture is while the centric server crashed, the entire system can not work anymore.The second type P2P system, fully-distributed architecture, which tries to fix the problem in centric P2P such as Guntella [15] and Free-net [16]. All peers in fully-distributed P2P system play the role of client and server at the same time. The fully-distributed architecture P2P system solves the reliability problem in centric P2P; however, the performance and management are inferior to the first type in contract. Those two P2P systems hold different problems respectively. Therefore, there is the third type architecture which is mixed the two architectures. This architecture is using more than one distributed server to separate loading and increase reliability performance.Sun Microsystems develops a P2P system which is so called the third generation P2P architecture on novel technology; JXTA. In general, the third generation using the hierarchy architecture, being more reliability and flexibility than the centric P2P network, and better management and performance than distributed P2P. The main advantages while the 3rd P2P apply on mobile environment are as the following:P2P network will be similar to distribute system and have higher reliability. If there is only one server, the whole P2P crash when the server dysfunction. P2P network will have high performance, using clustering to improve the bottleneck of routing.Self-autonomy management in P2P network can improve system performance. Because of every above-mentioned advantage, we select the third generation of P2P network on NEMO as the basic architecture in this paper. NEMO under the structure of Mobile IPv6 ...