A hub detour routing strategy in wireless scale-free networks

In wireless scale-free networks (WSFNs), there exist hubs which have relatively many connections with other nodes. Even though these hubs can be efficiently utilized to forward other nodes´ packets, inversely hubs can encounter traffic congestion and malicious attacks. To minimize the impact of specific nodes such as hubs to an entire network, we propose a hub detour routing scheme with the enhancement of an ant colony algorithm. By adopting a novel pheromone evaporation function, we achieve autonomous load balancing and robust packet delivery in a WSFN. Mathematical analyses provide the insight of our scheme. Furthermore, simulation results support the appropriateness of our scheme compared with a conventional ant colony routing scheme.