工矿自动化2025，Vol.51Issue(4)：74-85,12.DOI:10.13272/j.issn.1671-251x.2025020072
矿井Mesh无线多跳路径流内竞争分析及约束方法
Analysis and constraint methods for intra-flow contention in multi-hop paths of wireless mesh networks in mines
摘要
Abstract
To address the issue that the multi-hop bandwidth of existing wireless Mesh networks cannot support real-time,high-throughput services such as audio and video in mines,the intra-flow contention mechanism of multi-hop paths in mine wireless Mesh networks was analyzed,revealing the mechanism of multi-hop bandwidth degradation.It was pointed out that multi-hop relay systems with more than six hops have an optimal convergence ratio,which can potentially constrain the 1/n(n being the number of links)bandwidth degradation trend.However,systems with six or fewer hops cannot constrain this trend.The key factor determining the existence of an optimal convergence ratio is the ratio ⊿S between the carrier sensing distance and the stable communication distance.When path nodes are uniformly distributed with ⊿S=2,the optimal convergence ratio is 1/6.Due to the unique boundary characteristics of wireless transmission in mines,4S≈3,resulting in an optimal convergence ratio of 1/8 when nodes are uniformly distributed.However,the asymmetric and unstable nature of wireless coverage in mines prevents uniform node distribution.Therefore,for a 10-hop path in a simulated mine,the optimal convergence ratio is 1/5.Based on the idea of constraining the contention range,a method of constructing a chain network using frequency-division segmented serial hybrid links was proposed.Without modifying the Mesh protocol,this method constrained intra-flow contention within each path segment by splitting the path using different frequencies.Experimental results showed that when the number of wireless links exceeded ten hops,the bandwidth between the first and last nodes in the chain network was greater than the multi-hop bandwidth of traditional Mesh paths,and the convergence ratio also exceeded 1/n,validating the feasibility of the proposed method in constraining the 1/n bandwidth degradation trend.关键词
矿井Mesh/矿井无线中继通信/无线多跳路径/流内竞争/多跳带宽/最优收敛比/异频分段Key words
mine Mesh/mine wireless relay communication/wireless multi-hop path/intra-flow contention/multi-hop bandwidth/optimal convergence ratio/frequency-division segmentation分类
矿业与冶金引用本文复制引用
李昀..矿井Mesh无线多跳路径流内竞争分析及约束方法[J].工矿自动化,2025,51(4):74-85,12.基金项目
国家重点研发计划项目(2022YFB4703603) （2022YFB4703603）
天地科技有限公司科技创新创业资金专项项目(2021TD-MS009). （2021TD-MS009）
