Mobility Pattern Based Chord (MP-Chord) for Enhanced Lookup Performance in Mobile P2P Networks

Abstract

The peer-to-peer (P2P) systems are mainly designed for wired networks. These networks suffer from many challenges like malicious content distribution, free riding, whitewashing, poor search scalability, lack of a robust trust model, etc. The churn of the nodes makes topology management and searching resource more puzzling. When P2P protocols are implemented for mobile networks, it adds more challenges, specially the mobility management of the mobile users, intermittent connection, and limited bandwidth. Chord based protocols are widely deployed in the P2P networks but Chord can’t perform well in the mobile P2P networks due to mobility of the users. The frequent join and depart of the mobile users creates Chord lookup failure and induces more cost to maintain the finger table. The mobility pattern of the mobile users can be considered to enhance of the Chord lookup performance for mobile P2P networks. It has been observed that most of the mobile users in the urban cities follow fixed mobility pattern which can be utilized to enhance the Chord performance. We have proposed a Mobility Pattern based Chord (MP-Chord) scheme for structured mobile P2P networks. We have presented analytical modelling and performance analysis of the proposed scheme and existing schemes and found that the proposed scheme performs better than the existing Chord-based schemes for mobile P2P networks.