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Low-Delay Broadband Satellite Communications with High-Altitude Unmanned Aerial Vehicles
- Low-Delay Broadband Satellite Communications with High-Altitude Unmanned Aerial Vehicles
- Joo, Changhee; Choi, Jihwan P.
- DGIST Authors
- Choi, Jihwan P.
- Issue Date
- Journal of Communications and Networks, 20(1), 102-108
- Article Type
- Author Keywords
- ALOHA; relay architecture; satellite communications; unmanned aerial vehicles (UAV); uplink access
- NETWORKS; EFFICIENT; SYSTEMS; SERVICES; TRANSMISSION; PERFORMANCE; ALOHA
- The large number of users and the long propagation delay of communication satellites make it difficult to deploy a random access scheme that performs well in terrestrial networks. The aim of this paper is to demonstrate that a relay architecture with unmanned aerial vehicles (UAV) between the ground and satellites can facilitate satellite access with a low overhead. We consider a TDMA-based two-level relay structure, in which users transmit data to UAVs through a random access scheme, and the UAVs forward it to the satellite with either a coordinated or uncoordinated access scheme. We show that the coordinated access for the UAV- to-satellite links can substantially improve the throughput and delay performance. We conclude that a proper scheme for resource allocation between ground-to-UAVs and UAVs-to-satellite is critical to optimize the relay network, which includes the UAV altitude, and should be based on traffic demand and the number of UAVs deployed. © 2011 KICS.
- Korean Institute of Communications and Information Sciences, IEEE Communications Society
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- Department of Information and Communication EngineeringNCRG(Networks and Communications Research Group)1. Journal Articles
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