Performance Analysis of Priority based Congestion Control for Heterogeneous Traffic in Multipath Wireless Sensor Networks

In wireless sensor network, the highly important problem to be considered is congestion. Congestion in a wireless sensor network can cause packet loss, which in turn reduces throughput and energy efficiency. Different priorities are set for different types of data generated in heterogeneous wireless sensor networks. In multi path routing, the data flow is forwarded in multiple paths to the sink node. In this paper we analyze the performance of a priority based congestion control for heterogeneous traffic in multi path wireless sensor network. We have considered the nodes that have multiple applications running with different priorities. The parent node of each sensor node allocates the bandwidth among its child nodes based on the source traffic priority and transit traffic priority of the data from heterogeneous applications in the child nodes. Packet service ratio is used to detect the congestion. The proposed work is simulated in NS2. The results are shown based on the evaluation of delay, loss and throughput through X-graph and performance is better when compared with PCCP protocol.