关键词: 无线传感器网络 拥塞避免 COTA

Abstract:

Congestion is an essential problem in wireless sensor networks. It causes the overall channel quality to degrade and the drop rate to rise. In this pa per, we propose a congestion-aware traffic allocation （COTA） algorithm to avoid congestion. COTA is used in multipath routing to balance the traffic o of the whole network. COTA uses some heuristic information to analyze the potential congestion region and avoid traversing these regions. In addition, t he packet scheduling in the＂busy＂ node is based on the level of the desired reliability to guarantee the priority of packets with highly desired reliaability. Comprehensive simulations have validated the distinguished performance in the several aspects of our framework.

Key words: WSN, congestion avoidance, COTA