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Contact Duration-Aware Epidemic Broadcasting in Delay/Disruption-Tolerant Networks
Kohei WATABE Hiroyuki OHSAKI
IEICE TRANSACTIONS on Communications
Publication Date: 2015/12/01
Online ISSN: 1745-1345
Type of Manuscript: PAPER
delay/disruption-tolerant networks, opportunistic networks, epidemic broadcasting, contact duration distribution, mobile ad-hoc network,
Full Text: FreePDF(1.8MB)
DTNs (Delay/Disruption-Tolerant Networks) composed of mobile nodes in low node-density environments have attracted considerable attention in recent years. In this paper, we propose a CD-BCAST (Contact Duration BroadCAST) mechanism that can reduce the number of message forwardings while maintaining short message delivery delays in DTNs composed of mobile nodes. The key idea behind CD-BCAST is to increase the probability of simultaneous forwarding by intentionally delaying message forwarding based on the contact duration distribution measured by each node. Through simulations, we show that CD-BCAST needs substantially less message forwardings than conventional mechanisms and it does not require parameter tuning under varieties of communication ranges and node densities.