DTCoop: Delay Tolerant Cooperative Communications in DTN/WLAN Integrated Networks

In this paper, the authors consider a DTN/WLAN integrated network where nomadic nodes with high mobility comprise a Delay Tolerant Network (DTN) while local nodes with low mobility reside in the coverage area of Wireless Local Area Networks (WLANs). A message dissemination service is considered, where data traffic is generated by a server in the Internet and destined to a group of nomadic nodes. In order to facilitate message dissemination, a Delay Tolerant Cooperative communication (DTCoop) scheme is proposed. The messages for dissemination are first pre-downloaded to a group of storage local nodes within a WLAN before the visit of a nomadic node, and then scheduled for transmission when a nomadic node comes into the transmission range.