无线传感网络中特征序列构造与识别算法

摘要

Interference between the devices becomes the bottleneck of network throughput in wireless sensor network, but wireless interference does not necessarily result in the loss of all the information of the desired signal. Currently, many researchers exploit the interference information to assist with the parallel communication, and the identification of signature is a key point to these works. We apply a distribute construction and identification signature algorithm based on multi-hash policy with the characteristics of signal, which helps to improve the efficiency of wireless communication and increase the ability of signature identification and significantly decrease the time cost of the algorithm. We build a testbed based on USRP+GNU Radio to evaluate the algorithm, and the results show the construction and identification algorithm of signature is valid.%无线传感网络中设备之间的干扰逐步成为制约网络性能提高的瓶颈，但干扰并不会导致信号的所有信息被完全淹没。为准确识别并发通信的链路，需要为每条链路分配唯一的特征序列。传统的 MAC 地址在干扰背景下难以被识别。本文利用信号的特征信息，提出了一种基于多哈希的特征序列的分布式构造与识别策略。这种构造与识别策略利用干扰信息提高无线信号的传输效率、提升并发传输的特征序列识别能力，并显著降低识别特征序列的处理时间开销。实验利用软件无线电试验环境USRP+GNU Radio构建实测平台进行对所设计的算法进行评估，实验结果充分验证了特征序列的构造与识别算法的高效性。