大规模部署的无线传感器网络中,节点状态变化极易导致数据投递率降低.为了建立无线传感器网络应用仿真平台,研究提高数据投递率的方法.通过分析TinyOS操作系统中数据汇聚协议CTP的实现机制以及基于NS2实现CTP协议的原理和方法,采用一种新思路,将TinyOS基于组件化编程思想实现的CTP协议移植到基于面向对象的NS 2中,实现了CTP的链路质量评估、信标帧传榆控制和数据包转发重传等重要机制,最后进行了NS 2仿真实验.仿真结果表明,CTP协议具有高可靠性.%In the light of low data deliver ratio caused by inconsistent nodes in large-scale multi-hop wireless sensor network, the mechanism of CTP aggregation protocol in TinyOS, as well as the realization of CTP based on NS 2 are analyzed.A new scheme is proposed that CTP protocol is transplanted from component-based TinyOS into object-oriented NS 2, which fulfills link quality estimation, beacon frame transmission control and data packet forwarding, etc. Simulation results show that CTP protocol has high reliability.
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