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http://dx.doi.org/10.6109/jkiice.2022.26.2.239

Exploiting Spatial Reuse Opportunity with Power Control in loco parentis Tree Topology of Low-power and Wide-area Networks  

Byeon, Seunggyu (Department of Artificial Intelligence, Silla University)
Kim, Jong Deok (School of Computer Science and Engineering, Pusan National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.26, no.2, 2022 , pp. 239-250 More about this Journal
Abstract
LoRa is a physical layer technology designed to secure highly reliable long-range communication with introducing loco parentis tree network and chirp spreading spectrum. Since since a leaf can send message to more than one parents simultaneously with a single transmission in a region, packet delivery ratio increases logarithmically as the number of gateways increases. The delivery ratio, however, dramatically collapses even under loco parentis tree topology due to the limitations of ALOHA-like primitive MAC, . The proposed method is intended to exploit SDMA approach to reuse frequency in an area. With the view, TxPower of each sender for each message in a concurrent transmission is elaborately controlled to survive the collision at different gateway. Thus, the gain from the capture effect improves the capacity of resource-hungry Low Power and Wide Area Networks.
Keywords
Internet of Things; Low-power and Wide-area Networks; LoRa/LoRaWAN; Topology Control; Power Control;
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