摘要
在强实时WSN中,现有基于竞争的通讯协议(如TDMA等)实时性较低,主要表现于在同一时刻只有一个传感器独占信道,其他需传输数据的传感器排队等待,这无法满足爆炸监测等应用。针对该现象论文提出了基于CDMA的HRC-MAC(hard real-time mac)协议算法,利用CDMA码分复用的特点保证多个需传输数据的传感器共享信道同时进行传输,从而有效地提高了网络的实时性。实验数据显示该协议算法在网络传输延时方面有很大优化,实现了时间的多路复用,达到了强实时的同步通信。
In the wireless sensor networks of hard real time,now communication protocol based on competition,such as TimeDivision Multiple Address(TDMA),has a low real time.There is only one sensor occupying one channel at the same time,whilethe other needing to transmit data wait in line,which cannot meet the demand of explosive monitoring and other applications.Aim?ing at the appearance,this paper proposes an optimization algorithm of HRC-MAC(hard real-time mac)based on Code DivisionMultiple Access(CDMA).By using the feature of code division multiplexing on CDMA,many sensors that need transmitting datawork at the same time can be ensured,which can improve the real time effective.Experimental data shows that the protocol algo?rithm optimizes much in the aspect of the net transmission delay,and makes the time multiplexing come true,which achieves thehard real-time synchronous communication.
作者
王中正
王金星
WANG Zhongzheng;WANG Jinxing(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500;Computer Technology Application Key Lab of Yunnan Province ,Kunming 650500)
出处
《计算机与数字工程》
2017年第6期1105-1110,共6页
Computer & Digital Engineering
