Analytical Evaluation of Dynamic Proxy Assisted Mobility Support in P2P Networks

In recent years peer-to-peer communications has developed into a powerful networking model for real-time applications. Its slow adoption by the wireless community can be attributed to several factors including resource limitations of portable devices and restrictive pricing models employed by operators. The mobility management strategy proposed in [1] alleviates some of these problems by allowing migration of proxy services to the local vicinity of a mobile peer whilst helping to reduce the traffic transmitted over the wireless link. In this paper, we analytically evaluate the above-mentioned scheme by formulating the performance metrics of registration cost and message delivery cost. Specifically we employ the random walk model to represent the motion of a mobile peer moving between different subnets. Our results show that considerable performance improvements, up to 80% in some cases, can be achieved in most mobility scenarios.