Greedy backpressure routing for Smart Grid sensor networks

In this paper, a greedy backpressure routing protocol is proposed for multigate mesh networks. This protocol evaluates the greedy backpressure metric (GBM) value of mesh points and routes packets in the direction of the steepest gradient. The GBM value is calculated using a combination of traffic load and the mesh point's hop count to the closest gateway. The proposed routing algorithm can realize the effect of traffic load from all the nodes along the path to each gateway by iteratively updating information from neighbors through periodic beacon exchange. The consideration of incorporating traffic load helps to route packets around congested area. The results indicate that the greedy backpressure multigate mesh routing is capable of achieving significant improvement in the network reliability, latency, and throughput performance.