中文摘要：

针对多跳汇聚无线传感器网络漏斗效应引起的拥塞和能耗问题,提出基于异构比特速率的无线传感器网络拥塞控制技术,通过增大漏斗区域转发节点的比特速率来提高处理能力。为实现异构比特速率传输,在硬件上设计了基于ATmega128微处理器和CC1100射频芯片的传感器节点,支持多种比特速率通信;在软件上改进了Tiny OS系统组件,实现比特速率动态切换。通过实际部署的传感器网络实验表明：在趋于饱和的流量下有效缓解了网络拥塞,吞吐量提高了18.6%。

英文摘要：

Aiming at problem of congestion and energy consumption caused by funneling effect of multi-hop aggregation wireless sensor networks（ WSNs）,propose heterogeneous-bit-rate-based WSNs congestion control technology,by increasing bit-rate of transmitting node in funnel region to improve processing ability. To implement heterogeneous-bit-rate transmission,sensor node composed by ATmega128 microprocessor and CC1100 RF chip is designed,and support multi bit-rate communications; improve component of Tiny OS in software to convert bit-rates dynamically. The experimental results based on real environment shows that network congestion is relieved effectively while fiow gets saturated,and the overall throughput is improved 18. 6 %.