Provisioning High-Precision Clock Synchronization Between UAVs for Low Latency Networks

被引：0

作者：

Shim, Hooyeop ^{[1
]}

Joo, Hyeontae ^{[1
]}

Kim, Kiseok ^{[1
]}

Park, Seongjoon ^{[1
]}

Kim, Hwangnam ^{[1
]}

机构：

[1] Korea Univ, Sch Elect Engn, Seoul 02841, South Korea

来源：

IEEE ACCESS | 2024年 / 12卷

基金：

新加坡国家研究基金会;

关键词：

Synchronization; Clocks; Global Positioning System; Autonomous aerial vehicles; Accuracy; Low latency communication; Wireless sensor networks; Wireless LAN; Hardware; Standards; Clock synchronization; low-latency networks; UAV; GPS; NTP; timestamping mechanism; PPS signals; MECS; P-MECS; TIME SYNCHRONIZATION; WIRELESS; TSN;

D O I：

10.1109/ACCESS.2024.3516856

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Unmanned aerial vehicles (UAVs), require low-latency control for accurate mission execution and automation in vehicular or industrial applications. To facilitate clock synchronization in ensuring low-latency performance for UAVs, we propose the Mobile Edge Clock Server (MECS), a software-based timestamping mechanism tailored for UAVs, by modifying the poll process in Network Time Protocol (NTP) and merging GPS signal resources. Through the application of the Raw-offset filter, we also propose precise MECS (P-MECS), aimed at achieving high precision by considering the characteristics of GPS modules and conducting an in-depth analysis of signals. The MECS and P-MECS resulted in improving clock accuracy and reducing inter-UAV synchronization error to 1/129 (99.2%) and 1/19,402 (99.99%), respectively, compared to NTP on WLAN, and to 1/32 (96.9%) and 1/4,762 (99.98%), respectively, compared to Chrony on WLAN.

引用

页码：190025 / 190038

页数：14

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