Link weights-based ANT colony routing algorithm for wireless sensor networks

Aiming at the network congestion of wireless sensor networks causing the problem of network quality of service reduced drastically, the paper proposes an improved ant-colony routing algorithm based on link weights. The algorithm by analyzing the factors of available bandwidth, transmission delay, which impacts link-state, to calculates the link weights and adjusts the size of the pheromone, the current status of nodes are reflected directly, network local congestion is avoided, network traffic is balanced; the algorithm through adjusting the link weights of evaporation coefficient to improve the global search ability. Simulation results show that the algorithm can control the network congestion and balance the network load distribution.