Buffer management for improving QoS in WSN

Wireless sensor network is a large collection of sensor nodes deployed in a particular area. These sensor nodes sense the area under consideration, and send signals to notify the sink node about changes in the area. Congestion may occur in the network, as signals from various nodes may be sent simultaneously. Each sensor node in the network consists of a buffer which may be used to get better performance in the network. The buffer size plays a very important role on the performance of the network. For an optimum buffer size, the throughput of the network increases considerably, whereas the delay in network can be reduced. This paper discusses various buffer management and buffer size related schemes proposed by various authors. Here we also present the various simulation results from which, we can conclude that the buffer size is very important parameter in the performance of network.