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中文摘要：
结合基于竞争和调度机制的混合型方案是高效的无线传感器网络MAC协议的重要解决思路．μ—MAC是一种典型的混合型MAC协议，奉文存深入研究μ-MAC的基础上，提出一种自适应的混合型协议Aμ-MAC．它针对动态流量的数据采集型应用，解决了μ-MAC中动态拓扑适应性及时钟同步问题，并提供了良好的流量自适应性．仿真结果表明，Aμ-MAC增强了协议的扩展性和适应性，具有更好的网络生存能力，而保留了与μ-MAC相近的节能效率和时延性能．
英文摘要：
The hybrid mechanism combining contention-based and schedule-based ways is an important solution for MAC protocols of wireless sensor networks （WSN）. μ-MAC is an effective hybrid MAC protocol of WSN. After a deep investigation of μ-MAC, an adaptive hybrid MAC protocol Aμ-MAC is proposed for the dynamic-traffic data collection applications. It solves the problems of the adaptability to dynamic topology and clock synchronization inμ-MAC, and further supports better adaptability to load traffic. The simulation results show that Aμ-MAC can enhance the expansibility and adaptability of the protocol and enable better network survivability, and yet has almost the same energy-efficiency and latency as μMAC.
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