DFH: Improving the Reliability of LR-FHSS via Dynamic Frequency Hopping

被引：3

作者：

Zhang, Fanhao ^{[1
]}

Yu, Fu ^{[1
]}

Zheng, Xiaolong ^{[1
]}

Liu, Liang ^{[1
]}

Ma, Huadong ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommun, Beijing, Peoples R China

来源：

2023 IEEE 31ST INTERNATIONAL CONFERENCE ON NETWORK PROTOCOLS, ICNP | 2023年

基金：

中国国家自然科学基金;

关键词：

LR-FHSS; frequency hopping sequence; OPTIMIZATION; ERROR;

D O I：

10.1109/ICNP59255.2023.10355600

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Long Range-Frequency Hopping Spread Spectrum (LR-FHSS) is a novel wireless communication technology to improve the coverage of Low-Power Wide-Area Network (LP-WAN). But our measurement finds that given the same set of sub-channels, different Frequency Hopping Sequence (FHS) can result in a reliability difference of up to 52.6 % in terms of Packet Reception Rate (PRR). The key observation indicates that the reliability of LR-FHSS is significantly influenced by the FHS besides the link quality. Hence, in this paper, we propose DFH that takes both link quality and FHS into consideration to improve the reliability of LR-FHSS. We first propose using the hop Signal-to-noise Ratio (SNR), a new indicator to reflect the quality of the sub-channels and establish the PRR prediction model according to hop SNR and FHS. Based on the model, we design an interleaving-based search algorithm to decide the optimal FHS. We implement and evaluate DFH on the commercial transceivers and SDR-based gateway. The results of experiments in real environments show that DFH can improve the PRR by up to 2.76x, compared to the standard LR-FHSS.

引用

页数：12