Joint Resource Allocation for SWIPT-Based Two-Way Relay Networks
Abstract
:1. Introduction
- A comprehensive multidimension resource optimization framework to enhance the outage performance for a SWIPT-based DF-TWR network is presented, in which power allocation, power splitting, and time allocation are jointly optimized. Compared with the schemes in [20,21,22,23], the proposed scheme is more complemented and achieves better performance.
- By assuming the different availability of CSI at relay, two joint resource allocation schemes are proposed and analyzed. With statistic CSI, a successive alternating algorithm is proposed to obtain the optimal parameters based on the derived closed-form outage probability. With instantaneous CSI, a suboptimal closed-form solution of the three parameters (PS, PA, and TA) is derived based on a multistep optimization and relaxation method.
- The proposed scheme outperforms existing resource allocation schemes; for example, the dynamic JRA scheme performs very similarly to the exhaustive search method, and has better performance compared with optimal power splitting (OPS) scheme.
2. System Model and Problem Formulation
2.1. System Model
2.2. Problem Formation
3. Joint Resource Allocation Schemes
3.1. Optimal Static JRA Scheme
3.2. Optimal Dynamic JRA Scheme
3.2.1. Optimal PA When TA Is Fixed
3.2.2. Optimal TA When PA Is Fixed
4. Simulation Results
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
Abbreviations
DF | Decode-and-Forward |
TWR | Two-Way Relay |
PA | Power Allocation |
PS | Power Splitting |
TA | Time Allocation |
JRA | Jointly Resource Allocation |
IoT | Internet of Things |
SWIPT | Simultaneous Wireless Information and Power Transfer |
MISO | Multiple-Input Single-Output |
CSI | Channel State Information |
MI | Mutual Information |
WPCN | Wireless Powered Communication Network |
NOMA | Non-Orthogonal Multiple Access |
AF | Amplify-and-Forward |
OWR | One Way Relay |
TWR | Two Way Relay |
SAO | Successive Alternating Optimization |
MO-RM | Multi-step Optimization with Relaxation Method |
ES | Exhaustive Search |
Appendix A. Proof of Theorem 1
Appendix B. Proof of Theorem 2
Appendix C. Proof of Theorem 3
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Peng, C.; Wang, G.; Li, F.; Liu, H. Joint Resource Allocation for SWIPT-Based Two-Way Relay Networks. Energies 2020, 13, 6024. https://doi.org/10.3390/en13226024
Peng C, Wang G, Li F, Liu H. Joint Resource Allocation for SWIPT-Based Two-Way Relay Networks. Energies. 2020; 13(22):6024. https://doi.org/10.3390/en13226024
Chicago/Turabian StylePeng, Chunling, Guozhong Wang, Fangwei Li, and Huaping Liu. 2020. "Joint Resource Allocation for SWIPT-Based Two-Way Relay Networks" Energies 13, no. 22: 6024. https://doi.org/10.3390/en13226024