Spectrum efficiency maximization with trajectory design in
UAV-enabled mobile relaying

doi:DOI: 10.19682/j.cnki.1005-8885.2019.1013

The Journal of China Universities of Posts and Telecommunications ›› 2019, Vol. 26 ›› Issue (4): 17-24.doi: DOI: 10.19682/j.cnki.1005-8885.2019.1013

• Wireless • Previous Articles Next Articles

Spectrum efficiency maximization with trajectory design in

UAV-enabled mobile relaying

Sun Chuanzhi, Hu Zhiqun, Wen Xiangming, Lu Zhaoming, Qi Hang

1. Beijing Laboratory of Advanced Information Networks, Beijing University of Posts and Telecommunications, Beijing 100876, China

2. Beijing Key Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications, Beijing 100876, China

3. School of Computer and Information Engineering, Hubei University, Wuhan 430062, China

Received:2019-04-18 Revised:2019-07-26 Online:2019-08-31 Published:2019-10-29
Contact: Corresponding author: Hu Zhiqun, E-mail: zhiqunhu520@163.com E-mail:zhiqunhu520@163.com
About author:Corresponding author: Hu Zhiqun, E-mail: zhiqunhu520@163.com
Supported by:
This work was supported by the National Natural Science

Foundation of China (61671073) and Youth Science Foundation

of Hubei University (201811193000006).

Abstract

Abstract: With the advantages of low cost and high mobility, unmanned aerial vehicles (UAVs) have played an important

role in wireless communication. We investigate a UAV-enabled mobile relaying system, where a UAV is used as a

mobile relay to assist in the communication from a ground source to a ground destination since their direct link is

blocked. Unlike the conventional mobile relay in which the UAV adopts straight line or circular trajectory, we

consider a more general elliptical trajectory and use realistic channel models. By assuming that the UAV employs

time-division duplexing (TDD) based decode-and-forward (DF) relaying, we jointly optimize the time allocations

and the UAV trajectory to formulate the maximization of spectrum efficiency (SE). The simulation results show that

the trajectory we designed achieves a higher SE than the optimal circular trajectory and static relaying.

Key words: UAV, mobile relay, time allocations, elliptical trajectory

CLC Number:

TN92

Sun Chuanzhi, Hu Zhiqun, Wen Xiangming, Lu Zhaoming, Qi Hang.

Spectrum efficiency maximization with trajectory design in

UAV-enabled mobile relaying

[J]. The Journal of China Universities of Posts and Telecommunications, 2019, 26(4): 17-24.

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Spectrum efficiency maximization with trajectory design in

UAV-enabled mobile relaying

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