摘要： 数据如何以较低的能耗进行可靠传输是无线传感器网络中数据采集亟需解决的问题。基于此，提出一种缓存位置滑动调整的可靠传输协议，该协议基于通信的中间节点缓存数据包，按照通信距离将链路上的节点划分为近源节点和近汇聚节点，根据链路质量动态调整缓存数据包的节点区域，数据包在相应节点区域的缓存呈正态分布。NS2仿真结果与基于马尔科夫链能耗分析结果表明，该协议中数据包的传输时延小于HHRA协议，吞吐量有较大程度的提高。

关键词: 可靠传输, 低能耗, 缓存, 动态调整, 马尔科夫链模型, 正态分布

Abstract: This paper presents a kind of reliable transmission protocol with dynamic adjustment for caching position, which makes a good compromise between transmission reliability and energy consumption. This protocol is based on the intermediate nodes cache data packet, so the link node can be divided into near-source node and near-sink node according to communications distance. Dynamically adjustment of the node section for cache packet is done in accordance with link quality. To make more uniform distribution of cache, the packets are normally distributed to cache at their corresponding section. Simulation and energy consumption model based on Markov analysis show that, this protocol can improve the transmission reliability with reduced energy consumption.

Key words: reliable transmission, low energy consumption, cachin, dynamic adjustment, Markov chain model, normal distribution

中图分类号: 

• TP393