Minimum Delay Forwarding in Intermittently Connected Sensor Networks

We consider rechargeable wireless sensor networks that experience intermittent connectivity due to power outages caused by insufficient energy harvesting and limited storage. We present a predictive retransmission strategy that is integrated with opportunistic routing and unicast routing with cooperative relaying to reduce the transmission delay in such networks. Simulation results are presented to demonstrate the effectiveness of the proposed predictive retransmission scheme and the relative performance of opportunistic and cooperative unicast routing under realistic network models.