Many-to-one congestion control scheme for densely populated WSNs

Abstract

Many-to-one transport results in congestion in wireless sensor networks. This is due to the sudden impulse of information flow to a single destination. Greater the number of event reporting nodes greater will be the degree of congestion; considering fixed transmission power for nodes. Therefore an important factor in the design of a congestion control scheme is the density of the network. In this paper we present a new congestion control scheme based on hop-by-hop packet delivery time and buffer size. The new congestion control scheme is at the transport layer and uses a TDMA-like mechanism to optimally adjust the reporting rate of events. Detailed simulation analysis confirm that the proposed congestion control scheme decreases packet drops and provide high packet delivery ratio (above 90%) from even very dense event reporting regions.