Congestion level based end-to-end acknowledgement mechanism in delay tolerant networks
Wang Jian-xin · Journal of Central South University(Science and Technology) · 2012
Transport layer end-to-end reliability is one important issue in delay tolerant networks(DTNs).Because of the intermittent connectivity,DTNs lack stable end-to-end paths.Thus traditional end-to-end reliability approaches cannot work well in DTNs.The principle of end-to-end acknowledgement and the existing main problems in DTNs are analyzed deeply,and a novel congestion level based end-to-end acknowledgement mechanism-active-passive receipt(APR) is proposed,which combines active manner with passive manner in order to limit the total overhead and guarantee a reasonable transmission delay,and ultimately achieve preferable combination property.Simulation results show that our approach effectively balances the network cost and delay,and achieves higher message delivery rate.