关键词: 传感器网络 拥塞缓解 信息熵 联合信息熵 公平性

Abstract:

According to the characteristics of WSNs,we introduce a new definition of fairness and a congestion fairness control scheme based on joint entropy. Th e scheme distributes bandwidth in proportion to the value of joint entropy to alleviate node congestion. And the actual rate of the upstream nodes will  be bounded by the algorithm of token-bucket. Extensive simulations demonstrate the scheme can reduce the number of dropped packets,improve energy effici ency and make sure that the number of received data packets is in proportion to the number of useful data which are contained in the data packets.

Key words: sensor network, congestion alleviation, entropy;joint entropy, fairness