无线Mesh控制网中双路径并发可行性分析和时延估计

Feasibility Analysis of Dual-Concurrent-Paths and Time Delay Estimation in Wireless Mesh Control Networks

在无线网络控制系统中,无线链路的不稳定和无线电波之间的干扰将引起数据丢失和通信时延,导致无线网络控制系统不稳定。为提高无线网络控制系统的稳定性,本文提出双并发路径的方法,即在同一源目节点对间采用两条节点不相交路径同时传输数据,目的节点接收最先到达的数据。在这种方式下,数据从任意一条路径达到目的节点即可保证其成功接收。此外,本文还利用无向图着色方法论证双路完全并发的可行性,以及利用排队网理论分析双路径并发方式平均端到端时延。最后,在理论分析的基础上,利用Matlab实现双并发路径事件触发仿真,对比分析得到的数据流端到端平均时延与仿真结果。结果显示,在允许毫秒级误差情况下,本文给出的时延分析方法能对双路径并发端到端时延进行预测。

The wireless link instability and interference between radio waves will cause data loss andcommunication delay,leading to unstable of wireless mesh control system.In order to improve thestability of the wireless mesh control system,a method of dual-concurrent-paths is proposed,that twopaths of disjoint nodes are used to transmit data simultaneously,and the destination node receives thefirst arriving data.In this way,the data from any path to the destination node will ensure its successfulreception.Secondly,the feasibility of the proposed scheme is proved by the method of undirected graphcoloring.And,the average end-to-end delay of dual-path-concurrency is analyzed by queuing networktheory.Finally,simulations of dual-concurrent-path event triggering are carried out by Matlab based on thetheoretical analysis.It shows that the proposed delay analysis method can predict the end-to-end delay ofthe dual-path with the allowable millisecond error by analysis and compare the simulation results.