Abstract
Security is a critical issue for cognitive LEO satellite terrestrial networks (CLSTNs) in the future 6G era. To guarantee the secure transmission of both the satellite and terristrial users under limited power budgets, we propose a joint opportunistic satellite scheduling and beamforming (BF) scheme for the CLSTN. Specifically, we formulate an optimization problem to maximize the secrecy energy efficiency (SEE) of the satellite user under the secrecy constraint of the base station (BS) user, the signal-to-interference plus noise ratio (SINR) requirements of the intended users and the limited power budgets of the transmitters. Since the formulated problem is complex and nonconvex, we first consider the achievable SEE of a given scheduled satellite and transform the original SEE maximization problem into a convex problem based on the Dinkelbach’s method and the difference of two-convex functions (D.C.) approximation method. Consequently, we propose a three-tier algorithm to jointly determine the satellite scheduling vector and the BF vectors of the satellite and BS. Simulation results verify the superiority of our proposed scheme over the existing schemes.
| Original language | English |
|---|---|
| Title of host publication | Communications and Networking - 16th EAI International Conference, ChinaCom 2021, Proceedings |
| Editors | Honghao Gao, Jun Wun, Jianwei Yin, Feifei Shen, Yulong Shen, Jun Yu |
| Publisher | Springer Science and Business Media Deutschland GmbH |
| Pages | 65-79 |
| Number of pages | 15 |
| ISBN (Print) | 9783030991999 |
| DOIs | |
| State | Published - 2022 |
| Event | 16th EAI International Conference on Communications and Networking in China, ChinaCom 2021 - Virtual, Online Duration: 21 Nov 2021 → 22 Nov 2021 |
Publication series
| Name | Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST |
|---|---|
| Volume | 433 LNICST |
| ISSN (Print) | 1867-8211 |
| ISSN (Electronic) | 1867-822X |
Conference
| Conference | 16th EAI International Conference on Communications and Networking in China, ChinaCom 2021 |
|---|---|
| City | Virtual, Online |
| Period | 21/11/21 → 22/11/21 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Cognitive LEO satellite terrestrial network
- Physical layer security
- Satellite scheduling scheme
- Secrecy energy efficiency
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