Proactive Cooperation Mechanism against Selfish Power Off for Mobile Ad Hoc Networks

Toshihiro SUZUKI  Ashiq KHAN  Wataru TAKITA  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.10   pp.2702-2711
Publication Date: 2007/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.10.2702
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on New Challenge for Internet Technology and its Architecture)
ad hoc networks,  routing,  stable communication,  selfish,  

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In mobile ad hoc networks, as the communications have to be achieved autonomously and via third parties, a variety of risks against stable communication and session completion can be predicted. Many researchers have been studying these issues, i.e., mobility, broadcast storm, selfish behavior on data forwarding, security, and so forth. However, availability of routes against selfish power off is still to be addressed. This paper defines a new, realistic and practical problem beyond the scope of malicious program modification, called selfish power off, and evaluates the influence of it. Here, a selfish user turns his terminal on only when it has some data to send or receive and decline to work as an intermediate user by turning its terminal power off. In addition, this paper proposes a solution, called Proactive COoperation Mechanism (PCOM) against selfish power off in order to eliminate the influence of selfish power off. In PCOM, each user holds the cooperation records of its adjacent users, and forwards only those packets that are generated by users with good cooperation records. PCOM thus prevents SUs from joining the network. Extensive simulation shows the efficiency of our proposal in maintaining network connectivity and fairness in resource consumption.