Congestion in wireless sensor network occurs mainly due to two reasons --when multiple nodes want to transmit data through the same channel at a time or when the routing node fails to forward the received data to the net routing node. Congestion in wireless sensor network cause packet loss and due to this packet loss throughput may be lowered and also, congestion leads to excessive energy consumption. Therefore congestion has to be controlled to prolong the sensor nodes lifetime, in terms of throughput and packet loss ratio along with the packet delay. This paper proposes an dynamic sink based congestion control protocol named dynamic sink based congestion control protocol (DSCCP) for wireless sensor networks. Congestion and data loss mainly occurs in the vicinity of the static sink. Dynamic sink is responsible for collecting data from the sensor nodes located in their vicinity ,thus avoiding data flow to a single data collection point, e. g. a static sink is the main cause of congestion , data loss and reduced lifetime of the sensor network. Also in proposed scheme we used the in-network storage model that is used to ensure data persistency under congestion on WSN. Through simulation we show the effectiveness of the given routing scheme in terms of congestion avoidance and increased lifetime of the WSN.

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Congestion Control Energy Efficient Routing Dynamic Sink Wireless Sensor Networks