Abstract:

Delay tolerant network (DTN) routing protocol based on historical information forwarding, according to the history of statistics forecast estimates on the next hop node, forwarding and storage of information to judge the best time, and avoids blindly forwarding information. In this paper, the typical spray and focus protocol choice blindness among nodes, the "separation time" applied to routing, buffer management and multicast mode, the good conservation of resources and improves communication efficiency. Simulation results show that the improved protocols effectively improve delivery ratio and shorten the message delivery delay.

Key words: delay tolerant network, separation time, copy control, buffer management, multicast routing