Congestion Aware Routing Protocol for Low Power and Lossy Networks

Network congestion is an emerging issue which degrades the performance of the network and this further leads to a delay in the delivery of packets from source to destination. Backpressure algorithm is commonly used for providing optimal throughput in scheduling and routing decisions for multi-hop networks with the help of changing traffic. All nodes obey the algorithm rules for the exchange of information. But such an assumption does not always hold in realistic scenarios. In this paper we propose a novel mechanism, for prioritizing emergency and regular packets using Event Aware Backpressure Scheduling scheme with multi-level priority approach. For the protection of backpressure algorithm (based on routing and scheduling protocols) against various insider threats, virtual trust queuing is used. The mechanism overcomes the problem of network congestion and delivers the packets from source to destination on the priority basis. Experimental results show improvement in throughput, loss ratio, delay time, network lifetime, protocol efficiency, dropped node, source frequency rates, and destination frequency rates.