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中文摘要：
针对目前基于周期性分簇的同步协议需时间同步、不适应于事件驱动下的传感器网络的问题，提出了一种事件驱动下支持服务质量（QoS）的异步分簇协议，其核心是事件产生时能够保证实时可靠传输，网络分簇按照某一分簇概率异步进行，该概率由簇头的数据传输速率和剩余能量共同决定；无需时间同步，且采用混合式的簇构造算法来选举新簇头．仿真实验结果表明：该协议保证了敏感数据的实时传输，降低了丢包率，并有效地均衡了节点的能量消耗，延长了网络存活期．
英文摘要：
Aiming at the problems that periodicity based synchronous clustering protocols need time synchronization and being not suitable for events-driven wireless sensor network, an events-driven asynchronous clustering protocol supporting QoS was proposed. The main object was that the new events can be transmitted timely and reliably. Clustering starts asynchronously according to a proba- bility, which was determined by cluster heads＇ data transmit rate and residual energy. There was no need for time synchronization, and adopts composite method to construct a cluster and select new cluster head. Simulation results showed that this protocol ensures the real-time transmission of sensitive data, reduces the packet loss rate, and efficiently balances energy consumption of nodes, then prolongs network lifetime.
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