Performance Analysis of Message Dissemination in ICMN Under the Last-Create–First-Relay Scheme

With encounter-based communication introduced in intermittently connected mobile networks (ICMNs), the message dissemination in mobile Internet subscriber/publisher services can be augmented through near-distance communication of mobile nodes. Specifically, mobile nodes with Internet connectivity can help those without to obtain messages once stored and currently carried by the former. We model such a system, particularly considering the time-critical property of messages, the limited communication bandwidth, and the existence of multiple sources. Based on the model, we propose analytical methods for obtaining the performance of message delivery ratio and average delay under the 1-hop or the 2-hop relaying mode specified in this paper, respectively. Through extensive simulations, we validate the proposed methods and discuss system performance under different parameter settings and relaying schemes.

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