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학술지 A Real-Time LoRa Protocol for Industrial Monitoring and Control Systems
Cited 22 time in scopus Download 141 time Share share facebook twitter linkedin kakaostory
저자
Quy Lam Hoang, 정우성, 윤태현, 유대승, 오훈
발행일
202003
출처
IEEE Access, v.8, pp.44727-44739
ISSN
2169-3536
출판사
IEEE
DOI
https://dx.doi.org/10.1109/ACCESS.2020.2977659
초록
LoRa technology draws attention for its use in industrial monitoring and control systems in which each end device or task is required to send data periodically to a (cloud) server. Despite its provision of a stable link, it suffers from data loss by signal suppression and interference. A real-time LoRa protocol is proposed that uses a slot scheduling to remove collision and device or node grouping based on signal attenuation to deal with signal suppression. Based on the definition of a frame-slot structure, a logical slot indexing algorithm is devised to tag a logical index to each slot. The logical indices enable the easy allocation of slots to nodes such that if each node sends data in the allocated slots, it can satisfy time constraint. To handle external interference caused by other networks, the protocol uses a multiple listen-before-talk (mLBT) mechanism that allows channel detection multiple times within one slot. Our protocol is compared analytically and experimentally with other ones to show its superior throughput and reliability against signal suppression and interference.
KSP 제안 키워드
Data loss, End device, External interference, Industrial monitoring, Listen before talk, LoRa Technology, Monitoring and Control System, Real-Time, Signal Attenuation, Slot scheduling, channel detection
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