Exploiting HDU/FDU-NOMA Schemes for Reliable Communication in Post-disaster Scenario

This work presents a reliable communication system tailored for post-disaster scenarios, where the existing terrestrial communication infrastructure is entirely disrupted by natural calamities. To encounter the situation, a Temporary Base Station (TBS) is deployed in the heart of the disaster-strick...

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Bibliographic Details
Published in:Wireless personal communications 2024-04, Vol.135 (3), p.1701-1724
Main Authors: Kumar, Rampravesh, Srivastava, Saurabh, Kumar, Sanjay
Format: Article
Language:English
Subjects:
Communication
Communications Engineering
Communications systems
Computer Communication Networks
Disaster management
Engineering
Networks
Nonorthogonal multiple access
Optimization
Outages
Reliability analysis
Signal,Image and Speech Processing
Unmanned aerial vehicles
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Summary:This work presents a reliable communication system tailored for post-disaster scenarios, where the existing terrestrial communication infrastructure is entirely disrupted by natural calamities. To encounter the situation, a Temporary Base Station (TBS) is deployed in the heart of the disaster-stricken area. However, due to the limited coverage area of the TBS, reaching far users becomes unattainable. To address this, Unmanned Aerial Vehicles (UAVs) are proposed as flying relays with indirect connectivity, utilizing Half-Duplex/Full-Duplex (HD/FD) Non-Orthogonal Multiple Access (NOMA) schemes, abbreviated as HDU/FDU-NOMA. The UAVs, strategically positioned around the TBS on a circular path, can move radially outward or inward based on far user throughput demands and also serve as near-users. Moreover, a Weibull fading distribution (WD) is taken into account for both links, encompassing transmissions from far-users to UAVs and from UAVs to TBS. To assess communication reliability, exact and closed-form expressions for outage probability and throughput performance are derived. These expressions aid in identifying optimal UAV locations to achieve throughput fairness for both far-users and near-users, as well as maximizing throughput for far-users. Additionally, the proposed scheme’s outage and throughput performance is demonstrated to surpass that of corresponding Orthogonal Multiple Access (OMA) schemes in the uplink. Simulation results conform to the analytical results.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-024-11144-w