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Mathematical framework for 5G‐UAV relay
Author(s) -
Khan Shah Khalid
Publication year - 2021
Publication title -
transactions on emerging telecommunications technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 47
ISSN - 2161-3915
DOI - 10.1002/ett.4194
Subject(s) - relay , non line of sight propagation , backhaul (telecommunications) , path loss , computer science , computer network , user equipment , bandwidth (computing) , telecommunications , real time computing , wireless , power (physics) , base station , physics , quantum mechanics
Unmanned aerial vehicle's (UAVs) small size, long‐lasting battery, and flexible trajectory have produced widespread applications in radio communication systems, especially its usage as a cellular tower (gNB) for 5G services. At the same time, the mmWave's enormous available bandwidth makes it the primary contender for next‐generation communication networks. This article aims to synthesize and assess the usage of mmWave concurrently in backhaul and access links for amplify‐and‐forward (AF) relay installed on the UAV. A mathematical framework is developed for the received power of the user equipment (UE) obtained in relay path (gNB‐UAV‐UE) and direct path (gNB‐UE) via; (i) free space, and (ii) log‐distance path loss model. The International Telecommunication Union recommended city model is used to assess the likelihood for LoS and NLoS paths in four urban environments; (i) high‐rise urban, (ii) dense urban, (iii) urban, and (iv) suburban. Furthermore, various parameters, that is, UAV's position and amplification factor are stipulated to optimize the efficiency of a UAV‐based AF relay for enhanced users coverage.