摘要： 提出一种自适应的拥塞缓解机制。当无线传感器网络发生拥塞时，尝试在拥塞节点附近建立新路径，路径建立失败时引入公平汇聚机制，按汇聚数据流权重大小比例限制上游节点速率以减少源节点数据发送率。仿真实验表明，该机制减少了能耗，降低了丢包率，使重要的数据能实时、公平地传送到目的节点。

关键词: 传感器网络, 拥塞缓解, 公平汇聚

Abstract: This paper proposes an adaptive scheme to alleviate congestion in sensor networks. It attempts to alleviate the congestion by creating more routing paths. When creating new path is failed, the paper introduces aggregate fairness model to reduce forwarding rate in proportion to upstream link’s aggregate flow weight and to alleviate the congestion. Simulations demonstrate that the scheme can improve energy efficiencies, reduce the number of dropped packets and ensure that some important data packets can reach sink node timely and fairly.

Key words: sensor networks, alleviate congestion, aggregate fairness

中图分类号: 

• TP393