Abstract
It is anticipated that unmanned aerial vehicle base stations (UAV-BSs) will play a role in compensating network outages in case of temporary/unexpected events on account of flexibility. However, one of the key issues is how to deploy them efficiently. In this paper, the coverage, capacity and interference constraints are jointly considered, making the 3D placement more practical. Given available UAV-BS number, frequency band number and ground user distribution, the optimization objective is to maximize the number of serviced users and it is formulated into a mixed integer non-linear problem. Thereupon we develop a heuristic algorithm to find a suboptimal solution with polynomial time complexity. Numerical results show that available UAV-BS number is the critical factor of serviced user percent when user density is high, while the maximal allowable coverage radius is the critical factor when user density is low.
This work was supported by National Natural Science Foundation of China (Grant number 61731012, 91638204, 61371081).
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- 1.
The fundamental results presented in [4] enables that the placement can be decoupled in the horizontal dimension from the vertical dimension without loss of optimality.
- 2.
In hotspot assistance scenarios, we can exclude the ground users served by ground base stations.
- 3.
Owing to the randomness of user distribution, it is impossible to reach this upper bound in practice.
- 4.
At the end of each loop from line 5 to 19 in Algorithm 1, the statistics with k UAVs being deployed can be recorded.
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© 2019 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Xu, L., Tang, Y. (2019). Efficient 3D Placement of Drone Base Stations with Frequency Planning. In: Chen, JL., Pang, AC., Deng, DJ., Lin, CC. (eds) Wireless Internet. WICON 2018. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 264. Springer, Cham. https://doi.org/10.1007/978-3-030-06158-6_32
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DOI: https://doi.org/10.1007/978-3-030-06158-6_32
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