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Time-efficient uplink data collection for UAV-assisted NOMA networks
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Wang, Wei, Zhao, Nan, Chen, Li, Liu, Xin, Chen, Yunfei and Niyato, Dusit (2021) Time-efficient uplink data collection for UAV-assisted NOMA networks. In: 2021 IEEE Wireless Communications and Networking Conference (WCNC), Nanjing, China, 29 Mar -1 Apr 2021 ISBN 9781728195056. doi:10.1109/WCNC49053.2021.9417543 ISSN 1558-2612.
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Official URL: http://dx.doi.org/10.1109/WCNC49053.2021.9417543
Abstract
In this paper, we propose a time-efficient data collection scheme, in which multiple ground devices upload their data to the unmanned aerial vehicle (UAV) via uplink nonorthogonal multiple access (NOMA). The total flight time of the UAV is equally divided into N time slots. The duration of each time slot is minimized by jointly optimizing the straight-line trajectory, device scheduling, and transmit power. To solve this mixed integer non-convex optimization problem, we decompose it into two steps. In the first step, we study the device scheduling strategy based on the UAV trajectory and the channel gains between the UAV and ground devices, through which the original problem can be greatly simplified. In the second step, the duration of each time slot is minimized by optimizing the transmit power and the UAV trajectory. An iterative algorithm based on alternating optimization is proposed, where each subproblem can be alternatively solved by applying successive convex approximation with the device scheduling updated at the end of each iteration. Numerical results are presented to evaluate the effectiveness of the proposed scheme.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Publisher: | IEEE | ||||
| ISBN: | 9781728195056 | ||||
| ISSN: | 1558-2612 | ||||
| Book Title: | 2021 IEEE Wireless Communications and Networking Conference (WCNC) | ||||
| Official Date: | 5 May 2021 | ||||
| Dates: |
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| DOI: | 10.1109/WCNC49053.2021.9417543 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Is Part Of: | 1 | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 2021 IEEE Wireless Communications and Networking Conference (WCNC) | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Nanjing, China | ||||
| Date(s) of Event: | 29 Mar -1 Apr 2021 |
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