关键词: 无线传感器网络, 代码分发, 空间多路技术, 流水线技术

Abstract: In order to adapt the change of time，environment and requirement in wireless sensor networks，it is inevitable to update the code after deployment.This paper introduces fundamental principle of Deluge which is a sort of code dissemination，then proposes a new pipeline algorithm based on distance of nodes，the new algorithm efficiently avoids hidden terminal problem of pipeline in Deluge protocol.Simulation results show that the improved pipeline algorithm has better performance.

Key words: wireless sensor networks, code dissemination, spatial multiplexing, pipelining