Location Based Contact Time Energy Efficient Routing (LCTEE) Approach for Delay Tolerant Networks

Most of the routing algorithm developed for DTN are encounter based algorithms in which some nodes meet with high frequency but for short period of time. Therefore, encounters cannot guarantee transmission of large number of messages during a contact. These methods also suffer from high overheads caused by the unnecessary transmissions and long delays due to suboptimal choices for relay nodes. Therefore, in this paper, we considered a duration based utility instead of frequency to achieve high transmission throughput between nodes. Further, to reduce the overheads, we propose to send multiple copies of a message towards the destination using direction based routing. In addition, we also used threshold based buffer management scheme to reduce overheads and improve packet delivery probability. The simulation results show that our proposed strategy reduces overheads as compared to the previous existing strategies while maintaining comparable delivery probability.