Synchronization System for Time of Mission and Flight Computers over UAV Network
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This paper proposes a system to synchronize the time of computers over an unmanned aerial vehicle (UAV) network. With the proposed system, the UAVs can perform missions that require precise relative time. Also, data collected by UAVs can be fused precisely with synchronized time. In the system, to synchronize the time of all computers over the UAV network, twostep synchronization is performed. In the first step, the mission computers of the UAVs are synchronized through the server of the system. After the first step, the mission computers measure time offset between the time of the mission computers and the flight computers. The offset values are delivered to the server. In the second step, virtual time is determined by the server from the collected time offset. The measured offset is compensated by moving the synchronized time of mission computers to the reasonable virtual time. Since only the time of mission computers are controlled, any flight computers that use micro air vehicle link (MAVLink) protocol can be synchronized in the proposed system.
Abstract
This paper proposes a system to synchronize the time of computers over an unmanned aerial vehicle (UAV) network. With the proposed system, the UAVs can perform missions that require precise relative time. Also, data collected by UAVs can be fused precisely with synchronized time. In the system, to synchronize the time of all computers over the UAV network, twostep synchronization is performed. In the first step, the mission computers of the UAVs are synchronized through the server of the system. After the first step, the mission computers measure time offset between the time of the mission computers and the flight computers. The offset values are delivered to the server. In the second step, virtual time is determined by the server from the collected time offset. The measured offset is compensated by moving the synchronized time of mission computers to the reasonable virtual time. Since only the time of mission computers are controlled, any flight computers that use micro air vehicle link (MAVLink) protocol can be synchronized in the proposed system.
참고문헌 (11)
- Choi, S., "Enabling drone as a service: OneM2M-based UAV", drone management system, 2017 (2017), ~
- Jeremy Elson, "Fine-grained network time synchronization using reference broadcasts", ACM SIGOPS Operating Systems Review, 36(SI), pp.147~163 (2002), Association for Computing Machinery (ACM)[DOI]
- Hasan, M. K., "Femtocell network time synchronization protocols and schemes, Research Journal of Applied Sciences", Engineering and Technology, 4, pp.5136~5143 (2012)
- Johannessen, S., "Time synchronization in a local area network", IEEE Control Systems, 24(2), pp.61~69 (2004), Institute of Electrical and Electronics Engineers (IEEE)[DOI]
- Lasassmeh, S. M., "Time synchronization in wireless sensor networks: A survey", Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon) (2010)
- Won-Seok Lee, "Time Management System for Applications of UAV Network", Journal of Positioning, Navigation, and Timing, 9(4), pp.405~409 (2020), 사단법인 항법시스템학회[DOI]
- Li, P., "Time Synchronization of White Rabbit Network Based on Kalman Filter", 2019 3rd International Conference on Electronic Information Technology and Computer Engineering (EITCE) (2019)
- D.L. Mills, "Internet time synchronization: the network time protocol", IEEE Transactions on Communications, 39(10), pp.1482~1493 (1991), Institute of Electrical and Electronics Engineers (IEEE)[DOI]
- "Network time protocol version 4: Protocol and algorithms specification" (2010)[URL]
- Solis, R., "A new distributed time synchronization protocol for multihop wireless networks", Proceedings of the 45th IEEE Conference on Decision and Control (2006)
- van Greunen, J., "Lightweight time synchronization for sensor networks", Proceedings of the 2nd ACM international conference on Wireless sensor networks and applications, pp.11~19 (2003)