Journal
IWCMC 2021: 2021 17TH INTERNATIONAL WIRELESS COMMUNICATIONS & MOBILE COMPUTING CONFERENCE (IWCMC)
Volume -, Issue -, Pages 1123-1128Publisher
IEEE
DOI: 10.1109/IWCMC51323.2021.9498792
Keywords
NOMA; Federated Learning and UAV swarms
Categories
Funding
- National Natural Science Foundation of China [62071431, 62072490]
- Science and Technology Development Fund of Macau SAR [0060/2019/A1, 0162/2019/A3]
- FDCT-MOST Joint Project [066/2019/AMJ]
- Intergovernmental International Cooperation in Science and Technology Innovation Program [2019YFE0111600]
- University of Macau [MYRG2018-00237-FST, SRG2019-00168-IOTSC]
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In this study, a federated learning framework combined with non-orthogonal multiple access technology is proposed for a UAV swarm composed of a leader-UAV and follower-UAVs. The joint optimization of transmission durations, broadcasting duration, and computation rates aims to minimize latency in executing FL iterations until reaching a specified accuracy. Numerical results demonstrate the effectiveness of the proposed algorithm over baseline strategies.
Equipped with machine learning (ML) models, unmanned aerial vehicle (UAV) swarms can execute various applications like surveillance and target detection. However, the connections between UAVs and cloud servers cannot be guaranteed, especially when executing massive data. Thus, traditional cloud-centric approach will not be suitable, since it may cause high latency and significant bandwidth consumption. In this work, we propose a federated learning (FL) framework via non-orthogonal multiple access (NOMA) for a UAV swarm which is composed of a leader-UAV and a group of follower-UAVs. Specifically, each follower-UAV updates its local model by using its collected data, and then all follower-UAVs form a NOMA-group to send their respectively trained FL parameters (i.e., the local FL models) to the leader-UAV simultaneously. We formulate a joint optimization of the uplink NOMA-transmission durations, downlink broadcasting duration, as well as the computation-rates of the leader-UAV and all follower-UAVs, aiming at minimizing the latency in executing the FL iterations until reaching a specified accuracy. Numerical results are presented to verify the effectiveness of our proposed algorithm, and demonstrate that the proposed algorithm can outperform some baseline strategies.
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