Abstract: In minimum hop count routing protocol，the network is divided into a cluster of concentric rings which relay on the distance of ordinary nodes and sink node and the radio range of a node.After data collection，data packages are directed to sink instead of broadcasting in the whole network，and when a command needed，it is diffused though the direct that the hop increasing by one hop.Based on the advantage of this protocol，this paper improves on network setup phase and data transmission phase.Depending on the simulation in OMNET++，compared to flooding and original minimum hop count protocol，the behavior of the improvement is obviously.The result of simulation validates the feasibility of the improvement.

摘要： 最小跳数路由协议根据普通节点到Sink的距离和节点的通讯半径，将网络划分为一簇同心圆环。在数据采集和传输阶段，传播的方向是向着Sink收敛的，而在Sink节点命令发送阶段，则可逐层对外扩散。以此为基础，对最小跳数路由算法组网和数据传播阶段加以改进，并在OMNET++环境下进行网络仿真，比较洪泛算法和改进前后的两种算法在数据传输上的性能差异，仿真结果验证了改进方案的可行性。