Abstract: Wireless sensor network is a widely emerging field due to its wide range of applications in different areas. There are many issues in this field like energy efficiency, routing, lifetime, battery power etc. To address these issues there are some approaches like congestion, clustering etc. This paper works on congestion avoidance in clusters of wireless sensor networks and presents an improved version of PASCCC (Priority Based Application Specific Congestion Control Clustering Protocol).

Keywords: WSNs, PASCCC, Congestion, Clustering, Token bucket algorithm.