Optimizing multi-path routing by avoiding Key Nodes

In this paper, we propose a new routing algorithm which combines source routing and intermediate routing in order to meet the requirement of node disjointed path and scalability. We also discover the existing of Key Nodes which we call KN, KN are the transmission congestion host spots, also in multi-path routing, they will lead to a low performance in disjointed path. We give a simple, effective method to detect KN and avoid them. The result of simulation shows that this method can obtain a good performance on disjointed path, and can significantly improve network reliability.