This paper proposes a design method of reprogramming in wireless sensor network on the basis of research to OTAP, MOAP,Deluge and so on. It is high-reliability, low storage and meets the real-time reguirements. The integrality of code image is ensured and the program can be loaded from the specified slot of the external flash due to the special design of Bootloader. We reduce the transmission of data traffic and simplify the inspection of the missing code part by designing special data ～ormat, as well as the distribution protocol and effective management of code storage. The simulation results of TOSSIM show the correctness of the design and advantages of performance.%针对目前重编程技术在无线传感器网络中的应用需求,在分析了OTAP、MOAP、Deluge等已有的代码分发协议优缺点的基础上,提出了一种高可靠、低存储并满足一定实时性的设计方法;该方法通过采用独特的Bootloader设计确保代码镜像的完整性以及能够从指定区域来引导程序;采用有效的数据格式、分发协议以及代码存储管理,减少了数据传输的通信量,简化了代码缺失部分的检查,从而降低了能耗,延长了网络寿命;TOSSIM仿真的结果验证了设计的正确性和性能的优越性.
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