Abstract | ||
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Drone cell (DC) is an emerging technique to offer flexible and cost-effective wireless connections to collect Internet-of-things (IoT) data in uncovered areas of terrestrial networks. The flying trajectory of DC significantly impacts the data collection performance. However, designing the trajectory is a challenging issue due to the complicated 3D mobility of DC, unique DC-to-ground (D2G) channel features, limited DC-to-BS (D2B) backhaul link quality, etc. In this paper, we propose a 3D DC trajectory design for the DC-assisted IoT data collection where multiple DCs periodically fly over IoT devices and relay the IoT data to the base stations (BSs). The trajectory design is formulated as a mixed integer non-linear programming (MINLP) problem to minimize the average user-to-DC (U2D) pathloss, considering the state-of-the-art practical D2G channel model. We decouple the MINLP problem into multiple quasi-convex or integer linear programming (ILP) sub-problems, which optimizes the user association, user scheduling, horizontal trajectories and DC flying altitudes of DCs, respectively. Then, a 3D multi-DC trajectory design algorithm is developed to solve the MINLP problem, in which the sub-problems are optimized iteratively through the block coordinate descent (BCD) method. Compared with the static DC deployment, the proposed trajectory design can lower the average U2D pathloss by 10-15 dB, and reduce the standard deviation of U2D pathloss by 56%, which indicates the improvements in both link quality and user fairness. |
Year | DOI | Venue |
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2019 | 10.1109/ICC.2019.8761719 | IEEE International Conference on Communications |
Field | DocType | Volume |
Base station,Wireless,Backhaul (telecommunications),Computer science,Scheduling (computing),Communication channel,Real-time computing,Integer programming,Trajectory,Relay,Distributed computing | Journal | abs/1906.00776 |
ISSN | Citations | PageRank |
1550-3607 | 0 | 0.34 |
References | Authors | |
14 | 7 |
Name | Order | Citations | PageRank |
---|---|---|---|
Weisen Shi | 1 | 242 | 16.00 |
Junling Li | 2 | 87 | 8.60 |
Nan Cheng | 3 | 970 | 81.34 |
Feng Lv | 4 | 313 | 28.56 |
Yanpeng Dai | 5 | 15 | 2.28 |
Haibo Zhou | 6 | 203 | 14.10 |
Xuemin Shen | 7 | 15389 | 928.67 |