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In this paper, the authors consider a DTN/WLAN integrated network where high-mobility nomadic nodes form a Delay Tolerant Network (DTN) and low-mobility local nodes reside in the coverage area of Wireless Local Area Networks (WLANs). A data dissemination service facilitated by packet pre-downloading is generated by a server in the Internet and destined to a group of nomadic nodes. In order to achieve efficient data dissemination, a double-loop receiver-initiated Medium Access Control (MAC) scheme is proposed. By implementing both outer-loop and inner-loop MAC, the proposed MAC scheme can achieve spatial and temporal diversity while reducing the MAC overhead. Analytical and simulation results are presented to demonstrate the performance of the proposed MAC scheme.
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