To Alleviate Congestion Using Hybrid Sink for Delay Sensitive Applications in Wireless Sensor Networks

The Congestion in Wireless Sensor Networks is significantly higher and thus severely affects the network performance leading to increased data loss and end to end delay. In a normal scenario a static sink collects data from the entire network but this approach results in high traffic load in the sink’s vicinity. To alleviate this problem a mobile sink is introduced in addition to already existing static sink for data collection from the network. Since the mobile sink travels through the network area, the sensor nodes deliver the data whenever the mobile sink comes near its vicinity. By this hybrid sink approach method along with efficient data collection algorithm not only reduces bottleneck around the static sink but also decreases end to end delay. This hybrid sink approach where a combination of a static sink and a mobile sink could be useful in delay sensitive applications. Analysis and simulation results show that Hybrid sink approach along with efficient data collection algorithm performs significantly better than a static sink.