Distributed Retransmission Buffer Recovery for Node Failure in Sensor Networks

摘要

In this paper, we examine a pipelined transmission scheme to transport large data ?les in wireless sensor networks. Our scheme uses a novel ?ow control method to re duce false retransmission caused by buffer over?ow, which severely affects network performance as the network di ameter increases. In particular we investigate a secondary buffer scheme designed to reduce the retransmission over head caused by node failure. We show that the sec ondary buffer guarantees a constant worst-case retransmis sion overhead for a failed node, which is a signi?cant improvement over the O(N) retransmission overhead for non-secondary-buffered schemes. Simulation results show that the proposed scheme signi?cantly increases network ef?ciency.