Distributed Multisource Parallel Coadjutant Transmission scheme based on P2P lookup protocol in DTN

Abstract

Recently, popularity of multimedia content sharing among the Internet users and development of wireless mobile devices have promoted a trend of deploying Peer-to-Peer (P2P) networks over mobile ad hoc networks (MANETs) for mobile content distribution. However, due to nodes' frequent movement, limited radio transmission range, sparse distribution and power limitations, MANETs may become Delay Tolerant Network (DTN). Therefore, this wireless mobile P2P networks over DTN have to be studied. Sharing multimedia files among users is an important application in wireless mobile P2P networks. Even though various multimedia content sharing mechanism in P2P networks over MANET have been proposed in the literature. However, DTN experiences frequent and long-duration partitions, therefore, the original method does not apply to DTN scenario. In this work, we propose a Distributed Multisource Parallel Coadjutant Transmission (DMPCT) mechanism of multimedia based on P2P lookup protocol. The proposed transmission scheme enables multimedia files to be sent to the receiver fast and reliably in wireless mobile P2P networks over DTN. Simulation results demonstrate that the proposed scheme significantly improves the performance of the file delivery rate and file delivery delay compared with the existing scheme.