A Mechanism for Enhanced Performance of Chord DHT in Mobile Environment
With the growth of advanced networking technologies and capable terminals, it is very convenient for mobile operators to develop new service contents for mobile phones such as mobile Internet services, mobile television, and context-aware mobile services.
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Abstract With the growth of advanced networking technologies and capable terminals, it is very convenient for mobile operators to develop new service contents for mobile phones such as mobile Internet services, mobile television, and contextaware mobile services. Meanwhile, peer to peer (P2P) technology has made great success in multimedia services in the fixed networks such as Skype, PPlive, and Sopcast. Besides, demand for using P2P applications over PDAs and smartphone is increasing. So that, mobility in P2P networking has become a popular research area in recent years. However, mobile environment is different from the fixed networks in that it is limitation for process capability, memory, battery of mobile terminal, intermittent nature of wireless link and high churn rate of mobile users. In this paper, we focus on study drawbacks of Chord DHT algorithm in mobile environment. After that, we propose a mechanism for improving performance of Chord DHT algorithm based on the idea that is immediately stability of network topology when there is any node joining and leaving the network. Our simulation results show that our algorithm is better than previous studies about performance improvement of Chord DHT in mobile environment. Keywords Distributed hash table · Chord DHT · DHT performance · High churn rate · Mobile peer to peer · Mobile peer to peer networks
V. T. Vinh (B) Thai Nguyen University of Information and Communication Technology, Quyet Thang, Thai Nguyen city, Vietnam e-mail: [email protected] N. C. Hung (B) Vietnam Research Institute of Electronics, Informatics and Automation, Quan Thanh, Hanoi, Vietnam e-mail: [email protected] N. Chaki et al. (eds.), Computer Networks & Communications (NetCom), Lecture Notes in Electrical Engineering 131, DOI: 10.1007/978-1-4614-6154-8_9, © Springer Science+Business Media New York 2013
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V. T. Vinh and N. C. Hung
1 Introduction Recently, advances in mobile devices and communication technologies are growing with fast speed enabling fascinating opportunities for multimedia services to be widely deployed both on the Internet and in telecommunication networks. Mobile phones have used not only mainly for the communication purpose but also other purposes such as making of short videos, playing games and listening to music. Therefore, multimedia applications are spreading on mobile phone networks. Whereas, P2P services such as file sharing services (e.g. BitTorrent, Gnutella) and communication services (e.g. Skype, PPlive, Sopcast) are very well known and popular for most of the fixed internet users. P2P technology offers an excellent media to distribute user created content. It is one of best choices for applications of multimedia communication by scalability, high reliability and balanced load. Also, the mobile phone networks are moving towards the Internet architecture. Voice, video and signaling traffic is being transmitted over TCP/IP family protocols. 3G networks have used the Session Initiation Protocol (SIP) as their signaling protocol. Internet connectivity sta
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