Journal
IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY
Volume 4, Issue -, Pages 197-208Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/OJCOMS.2022.3232888
Keywords
Autonomous aerial vehicles; Interference; Downlink; Ultra reliable low latency communication; Uplink; Intercell interference; Delays; URLLC; multi-UAV; cognitive radio; intercell interference coordination (ICIC)
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Unmanned aerial vehicles (UAVs) have emerged as potential candidates to support communications in 6G systems, but their usage increases interference. To address this issue, we propose low-complexity algorithms for interference coordination and model different types of interference. Results show that the proposed algorithms achieve better fairness and performance compared to conventional algorithms in UAV communications.
Ultra-reliable and low latency communications (URLLC) will be the backbone of the upcoming sixth-generation (6G) systems and will facilitate mission-critical scenarios. A design accounting for stringent reliability and latency requirements for URLLC systems poses a challenge for both industry and academia. Recently, unmanned aerial vehicles (UAV) have emerged as a potential candidate to support communications in futuristic wireless systems due to providing favourable channel gains thanks to Line-of-Sight (LoS) communications. However, usage of UAV in cellular infrastructure increases interference in aerial and terrestrial user equipment (UE) limiting the performance gain of UAV-assisted cellular systems. To resolve these issues, we propose low-complexity algorithms for intercell interference coordination (ICIC) using cognitive radio when single and multi-UAVs are deployed in a cellular environment to facilitate URLLC services. Moreover, we model BS-to-UAV (B2U) interference in downlink communication, whereas in uplink we model UAV-to-BS (U2B), UAV-to-UAV (U2U), and UE-to-UAV (UE2U) interference under perfect/imperfect channel state information (CSI). Results demonstrate that the proposed perfect ICIC accounts for fairness among UAV especially in downlink communications compared to conventional ICIC algorithms. Furthermore, in general, the proposed UAV-sensing assisted ICIC and perfect ICIC algorithms yield better performance when compared to conventional ICIC for both uplink and downlink for the single and multi-UAV frameworks.
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