说明：  In this paper we simulate a multi-hop self-organizing wireless sensor network. The purpose of the simulation is to investigate, quantitatively, the performance of our self-organizing network design. In particular, we examine such parameters as network formation time, data packet delivery performance, throughput, and device duty cycle. In addition, we analyze the impact of MAC and low-duty cycle protocols. We demonstrate that our tree network has the capability of automatic network formation, update, and recovery. The design also supports simple address assignments and straightforward routing. We discuss our approach, OPNET simulation design, and simulation results