DefinePK

Abstract

In Wireless Sensor Networks (WSNs), a mixture of Real-Time (RT) and Non-RT (NRT) packets are not effectively handled with different level of traffic class priorities due to its limited bandwidth allocation. This causes congestion through the network that leads high packet delay and less throughput. To effectively handle these packets and avoid congestion, a Combined Traffic, Bandwidth and Congestion Adaptive Rate Control (CTBCARC) algorithm has been designed that considers the Difference of Differential Rate (DDR) of a specified node including the joint notions of the traffic class priority, the proper bandwidth distribution and Active Queue Management (AQM). The traffic flow of each active queue was controlled by deciding weight value of priorities. But, the path stability was not considered to avoid the congestion efficiently. Therefore in this article, CTBCARC with Route Stability (CTBCARC-RS)-based algorithm is proposed for guaranteeing the path stability and avoiding the undesirable DDRs. In CTBCARC-RS algorithm, the long-term RS of WSN is measured by determining different factors such as the utilization rate of Relative Routing Path (RRP), distinct successive hop and Switching Frequency Counts (SFC). These factors are sampled regularly and reprocessed from prior data in the queue that do not want additional overhead. The utilization rate of RRP is used to identify the major routing junction spots in WSNs. The utilization rate of distinct successive hop corresponding to an independent origin is used for detecting the majority next hop from the minority next hops. Similarly, SFC is used for computing the reliability of the majority next hop corresponding to the source node. Based on these parameters, the path stability is measured to avoid the congestion and likelihood of path failure. Finally, the efficiency of CTBCARC-RS algorithm is evaluated with the conventional algorithms through the simulation results.