在NB-Fi网络的听话计划之前听话的好处
Irina Pavlova1, Dmitry Bankov1, Evgeny Khorov1
1Institute for Information Transmission Problems of the Russian Academy of Sciences, 127051 Moscow, Russia.
Sensors (Basel, Switzerland)
|November 25, 2023
概括
在谈话之前倾听 (LBT) 显著提高了窄带忠实 (NB-Fi) 网络性能,特别是在高负载下. 最佳的LBT策略因网络大小而异,小型网络非持久的CSMA和大型复杂网络的p持久的CSMA.
科学领域:
- 无线通信技术无线通信技术
- 低功率广域网 (LPWAN) 是一个低功率的广域网.
- 网络协议性能分析 网络协议性能分析
背景情况:
- 窄带忠实性 (NB-Fi) 是LPWAN的关键协议,利用免许可的ISM频段.
- NB-Fi 设备可以在带有或不带有Listen Before Talk (LBT) 的模式下运行,从而影响网络效率.
- 了解LBT的作用对于在各种网络条件下优化NB-Fi性能至关重要.
研究的目的:
- 为了比较NB-Fi网络的性能,使用和不使用Listen Before Talk (LBT).
- 在不同的网络负载和大小下评估不同的LBT实现.
- 分析LBT对数据包丢失率 (PLR),延迟,能源消耗和吞吐量的影响.
主要方法:
- 进行了广泛的模拟,以模拟NB-Fi网络行为.
- 测量了包括PLR,延迟,能源消耗和吞吐量在内的性能指标.
- 进行了NB-Fi网络与LBT和没有LBT之间的比较,以及不同LBT策略 (非持久CSMA,p-持久CSMA).
主要成果:
- 当网络负载超过每秒40个数据包时,Listen Before Talk (LBT) 显著改善了NB-Fi性能指标.
- 对于小型NB-Fi网络,非持久的CSMA实施LBT会产生最佳的PLR,延迟和能耗.
- 在带有隐藏设备的大型NB-Fi网络中,p-持久的CSMA LBT实现优于改善PLR,延迟,吞吐量和能源消耗.
结论:
- 对于优化NB-Fi网络,特别是在较高的流量负载下,LBT至关重要.
- 选择LBT实现 (非持久与p持久CSMA) 关键取决于网络规模和拓.
- 结果为部署高效和强大的NB-Fi基于LPWAN提供了实际指导.
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