Abstract
We investigate the use of reconfigurable intelligent surfaces (RISs) in wireless networks to maximize the sum secrecy rate (i.e., the sum maximum rate that can be communicated under perfect secrecy). Specifically, we focus on a network that utilizes RIS-assisted unmanned aerial vehicles (UAVs) under imperfect channel state information (CSI). Our objective is to maximize the sum secrecy rate while dealing with the presence of multiple eavesdroppers. To achieve this, we jointly optimize the active (UAV) and passive (RIS) beamforming together with the UAV's trajectories. The formulated problem is non-convex due to the coupling of CSI with the maneuverability of the UAV. To overcome this challenge, we propose a policy-based deep reinforcement learning (DRL) approach that solves the non-convex optimization problem in a centralized fashion. Finally, simulation results show that our proposed approach significantly improves average sum secrecy rates over conventional approaches.
Original language | English |
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Title of host publication | 2023 IEEE 98th Vehicular Technology Conference, VTC 2023-Fall - Proceedings |
Publisher | IEEE |
Pages | 1-6 |
Number of pages | 6 |
ISBN (Electronic) | 9798350329285 |
ISBN (Print) | 9798350329292 |
DOIs | |
Publication status | E-pub ahead of print - 11 Dec 2023 |
Event | 98th IEEE Vehicular Technology Conference, VTC 2023-Fall - Hong Kong, China Duration: 10 Oct 2023 → 13 Oct 2023 https://events.vtsociety.org/vtc2023-fall/ |
Publication series
Name | 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall) |
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Publisher | IEEE |
ISSN (Print) | 1090-3038 |
ISSN (Electronic) | 2577-2465 |
Conference
Conference | 98th IEEE Vehicular Technology Conference, VTC 2023-Fall |
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Abbreviated title | VTC2023-Fall |
Country/Territory | China |
City | Hong Kong |
Period | 10/10/23 → 13/10/23 |
Internet address |
Bibliographical note
This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.Keywords
- UAV
- RIS
- Eavesdropper
- Secrecy rate
- DRL