Backhaul-Constrained Resource Allocation and 3D Placement for UAV-Enabled Networks

Unmanned aerial vehicle (UAV)-base stations (BS) are envisioned to provide wireless access to areas where the existing wireless infrastructure is either not deployed, damaged or simply congested. In this paper, the problem of minimizing the transmit power of a UAV-BS, while serving users with their QoS requirements and accounting for the wireless backhaul limitation of the UAV, is investigated. To this end, an algorithm that finds the optimal bandwidth assignment in the backhaul link, the optimal 3D position of the UAV, as well as the transmit power distribution in the access and the backhaul links is proposed. Simulation results show that, using the proposed approach, the needed power is greatly reduced, when compared to a strategy that separates between the frequency band used in the access and the backhaul links. In addition, the performance enhancement of a UAV-enabled system over a traditional one in which the macro base station (MBS) directly serves users is shown.

[1]  Kandeepan Sithamparanathan,et al.  Optimal LAP Altitude for Maximum Coverage , 2014, IEEE Wireless Communications Letters.

[2]  Halim Yanikomeroglu,et al.  Backhaul-aware robust 3D drone placement in 5G+ wireless networks , 2017, 2017 IEEE International Conference on Communications Workshops (ICC Workshops).

[3]  Bo Hu,et al.  Energy Efficient Placement of a Drone Base Station for Minimum Required Transmit Power , 2020, IEEE Wireless Communications Letters.

[4]  Halim Yanikomeroglu,et al.  3-D Placement of an Unmanned Aerial Vehicle Base Station for Maximum Coverage of Users With Different QoS Requirements , 2017, IEEE Wireless Communications Letters.

[5]  Rui Zhang,et al.  Wireless communications with unmanned aerial vehicles: opportunities and challenges , 2016, IEEE Communications Magazine.

[6]  Abbas Jamalipour,et al.  Modeling air-to-ground path loss for low altitude platforms in urban environments , 2014, 2014 IEEE Global Communications Conference.

[7]  Yang-Seok Choi,et al.  Simultaneous Transmission and Reception: Algorithm, Design and System Level Performance , 2013, IEEE Transactions on Wireless Communications.

[8]  Halim Yanikomeroglu,et al.  User association and bandwidth allocation for terrestrial and aerial base stations with backhaul considerations , 2017, 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC).

[9]  Nirwan Ansari,et al.  On the Number and 3-D Placement of In-Band Full-Duplex Enabled Drone-Mounted Base-Stations , 2019, IEEE Wireless Communications Letters.

[10]  Walid Saad,et al.  A Tutorial on UAVs for Wireless Networks: Applications, Challenges, and Open Problems , 2018, IEEE Communications Surveys & Tutorials.

[11]  Taneli Riihonen,et al.  Recent advances in antenna design and interference cancellation algorithms for in-band full duplex relays , 2015, IEEE Communications Magazine.