Research Article
Secrecy Sum Rate for Two-Way Untrusted Relay in SCMA Networks
@INPROCEEDINGS{10.1007/978-3-030-32388-2_7, author={Yiteng Huang and Shuai Han and Shizeng Guo and Ming Li and Zhiqiang Li}, title={Secrecy Sum Rate for Two-Way Untrusted Relay in SCMA Networks}, proceedings={Machine Learning and Intelligent Communications. 4th International Conference, MLICOM 2019, Nanjing, China, August 24--25, 2019, Proceedings}, proceedings_a={MLICOM}, year={2019}, month={10}, keywords={Amplify-and-forward Two-way communication Untrusted relay Sparse code multiple access}, doi={10.1007/978-3-030-32388-2_7} }- Yiteng Huang
Shuai Han
Shizeng Guo
Ming Li
Zhiqiang Li
Year: 2019
Secrecy Sum Rate for Two-Way Untrusted Relay in SCMA Networks
MLICOM
Springer
DOI: 10.1007/978-3-030-32388-2_7
Abstract
Sparse code multiple access (SCMA) is a novel non-orthogonal multiple access technology that combines the concepts of CDMA and OFDMA. The advantages of SCMA include high capacity, low time delay and high transfer rate. The information security is also very important in 5G network. Relay is essential to be used for long distance cooperative transmission. In this paper, we consider a two-way relay system that each user pair can only communicate through an untrusted intermediate relay. We regard the intermediate relay as an eavesdropper and the confidential information must be kept secret to it. In order to maximize the sum security capacity, a subcarrier assignment algorithm based on matching theory is proposed in this paper. Finally, the theoretical analysis is verified by simulation. Simulation results show that security performance is improved significantly.