基于直连通信的矿用无线短距通信技术研究

Mining wireless short-range communication technology based on sidelink communication

  • 摘要: 矿用无线短距通信技术具备低时延、高可靠和灵活组网的能力,是解决矿山智能化建设过程中面临的数据传输时延大、信息交互流程复杂及装备控制精度受限等问题的关键手段。目前针对矿用无线短距通信技术的研究主要集中于ZigBee,WiFi和5G:ZigBee难以满足常态化应用需求;WiFi存在同频干扰,且传输时延较大;5G存在不可控数据传输风险,且成本较高。针对上述问题,提出了一种以工作于授权专用频段的直连通信为核心的矿用无线短距通信解决方案;构建了矿用直连通信独立组网、矿用直连通信和矿用5G融合组网2种架构,形成了“广域覆盖+局部增强”的全场景矿用通信新模式;针对直连通信在煤矿领域应用面临的时间同步、资源效率提升与可靠性保障等需求,研究了无GNSS时间同步、基于子帧和子信道的资源池动态配置、物理层无线信号传输及终端分布式资源分配等关键技术,有效提升了系统在复杂煤矿环境中的适应性与可靠性;研究了矿用直连通信技术在装备智能控制、井下自动驾驶及灾变应急指挥等领域的应用场景,验证了该技术在促进矿山业务与通信系统融合方面的实用价值。在实验室搭建了模拟煤矿井下无GNSS环境的测试系统,测试结果表明,系统平均时延低于23 ms,能够有效满足矿山关键业务场景对无线短距通信技术的需求,为矿山智能化建设提供了可靠的无线短距通信解决方案。

     

    Abstract: Mining wireless short-range communication technology has the characteristics of low latency, high reliability, and flexible networking, and is a key means to address problems encountered in the intelligent mine construction, such as large data transmission delay, complex information interaction processes, and limited equipment control accuracy. At present, research on mining wireless short-range communication mainly focuses on ZigBee, WiFi, and 5G. ZigBee is difficult to meet the requirements of routine applications, WiFi suffers from co-channel interference and large transmission delay, and 5G involves uncontrollable data transmission risks and high costs. To address these problems, this study proposed a mining wireless short-range communication solution with sidelink communication operating in licensed dedicated frequency bands as the core. Two types of architectures were constructed, including an independent networking architecture for mining sidelink communication and a hybrid networking architecture integrating mining sidelink communication and 5G for mining, forming a new full-scenario mining communication mode of "wide-area coverage plus local enhancement". To meet the requirements of time synchronization, resource efficiency improvement, and reliability assurance in the application of sidelink communication in coal mines, key technologies such as GNSS-free time synchronization, dynamic configuration of resource pools based on subframes and subchannels, physical-layer wireless signal transmission, and distributed resource allocation for terminals were investigated, which effectively improved the adaptability and reliability of the system in complex coal mine environments. Application scenarios of mining sidelink communication technology in intelligent equipment control, underground autonomous driving, and emergency command during disasters were also studied, which verified its practical value in promoting the integration of mining operations and communication systems. A test system simulating a GNSS-free underground coal mine environment was built in the laboratory, and the test results showed that the average system latency was less than 23 ms, which effectively met the requirements of critical mining scenarios for wireless short-range communication technology and provided a reliable wireless short-range communication solution for intelligent mine construction.

     

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