Unmanned aerial vehicle (UAV) has been regarded as a promising means to supplement ground communications. As flying relays, UAVs can be rapidly and flexibly deployed to assist data transmissions in many practical scenarios. In this paper, we investigate a two-way multi-hop UAV relaying network, where there are two ground users as sources and multiple UAVs as relays to help the two ground sources exchange information. We first provide an efficient two-way multi-hop UAV relaying pattern, which can achieve a data rate of 2/4 data packets per time slot with decode-and-forward (DF) protocol. Then, we further formulate a joint transmit power and trajectory optimization problem for the UAVs in this two-way multi-hop relaying scenario. The formulated problem is non-convex which makes it difficult to solve directly, hence we propose an iterative algorithm to obtain an approximate optimal solution. Numerical results demonstrate that our proposed network achieves significant throughput gains.
|Original language||English (US)|
|Title of host publication||2020 IEEE International Conference on Communications Workshops, ICC Workshops 2020 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Jun 2020|
|Event||2020 IEEE International Conference on Communications Workshops, ICC Workshops 2020 - Dublin, Ireland|
Duration: Jun 7 2020 → Jun 11 2020
|Name||2020 IEEE International Conference on Communications Workshops, ICC Workshops 2020 - Proceedings|
|Conference||2020 IEEE International Conference on Communications Workshops, ICC Workshops 2020|
|Period||6/7/20 → 6/11/20|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT This work is supported in part by the National Key Research and Development Project under Grant 2017YFE0119300 and 2019YFB2102300, in part by the National Natural Science Foundation of China under Grant 61936014 and 61901302, in part by the Scientific Research Project of Shanghai Science and Technology Committee under Grant 19511103302, in part by the open research fund of National Mobile Communications Research Laboratory, Southeast University (No. 2020D01), and in part by the National Science Foundation under Grant CPS-1932413 and ECCS-1935915.
- Trajectory optimization
- Two-way multi-hop relaying
- UAV communications