A Survey of Congestion Control Mechanisms in Wireless Sensor Networks

Congestion has always been a serious problem for all kinds of communication networks. Wireless sensor networks (WSN) face special difficulties in dealing with congestion due to their unique requirements and constraints. Various congestion control schemes for WSN have been proposed recently. These schemes try to solve the problem either at the MAC layer or through a cross-layer approach. This paper explores these schemes and tries to find their common features, which may direct future research.