Research on Unicast Routing for Deep Space Sensor Networks Based on DTN

In this paper, we proposed a kind of unicast routing suitable for deep space sensor networks, PEOPHR, on the basis of summarizing existing DTN unicast routing. This routing protocol utilizes a combination of copy and forward strategies. Its routing process consists three phrases: Bundle distribution based on copy strategy phase", "optimal path calculation based on WAOM routing selection mechanism phase and buffer management based on bundle priority phase. PEOPHR guarantees message delivery rate and controls consumption of network resource at the same time. We also evaluated routing performance by calculating the following indexes: message delivery rate", "average end to end delay and network lifetime. The results showed that the designation of DTN unicast routing protocol had achieved desired objectives.