无线HART网络中的高可靠资源分配策略  

Resources Allocating Strategy in Wireless HART Networks for High Reliability

作　　者：张盛[1] 张国勇[2] 鄢傲 

机构地区：[1]清华大学深圳研究生院,广东深圳518055 [2]清华大学电子工程系,北京100084

出　　处：《小型微型计算机系统》2014年第12期2593-2597,共5页Journal of Chinese Computer Systems

基　　金：国家科技重大专项项目(2011ZX03004-001-01)资助

摘　　要：Wireless HART是一种高可靠的网状无线传感器网络通信协议.TDMA和FHSS技术增强了Wireless HART网络的抗干扰能力;其独特的图路由模型保留了网络中丰富的冗余路径.描述了如何为Wireless HART网络中的每一条链路分配时隙和安排信道,在避免冲突的前提下,提高网络性能,并且提出一种基于图路由的资源调度算法.我们的调度策略结合Wireless HART网络的路由选择算法和多跳重传机制,大大提高了网络的强健性,同时保证了网络具有较高的吞吐率.此外,考虑到网络通信的实时性,本文策略合理地安排链路的次序,充分利用了网络资源,有效地减少网络延时.通过性能分析表明我们的资源调度策略使网络性能接近最优.与目前已有的Wireless HART调度算法相比较,我们的调度策略具有高可靠性和低延时等优势.WirelessHART is a highly reliable communication protocol of wireless sensor mesh network. TDMA and FHSS technology can enhance the ability of resisting interference in WirelessHART networks. Moreover, its unique graph route model retains abundant redundant paths. This paper describes how to allocate time slots and to assign channels for each link which can improve the network performance on the premise of avoiding conflict, and a graph route-based resources scheduling algorithm is proposed. Due to combining WirelessHART network routing algorithms and multiple-hops retransmission mechanism,our scheduling strategy greatly improves the network robustness and ensures high throughput. In addition, considering the real-time communication, the strategy reasonably arrange the order of links. As a result,network resources are used fully and end-to-end delay is effectively reduced. The performance analysis shows that our strategy makes the network performance close to optimal. Compared with the previous scheduling algorithms, our scheduling strategy has the advantages such as high reliability and low latency.

关 键 词：Wireless HART 资源调度 多跳重传 实时性 高可靠 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]