Complexity-Aware Relay Selection for 5G Large-Scale Secure Two-Way Relay Systems

被引：40
作者：
Zhang, Chensi [1 ]
Ge, Jianhua [1 ]
Li, Jing [1 ]
Gong, Fengkui [1 ]
Ding, Haiyang [1 ,2 ]
机构：
[1] Xidian Univ, State Key Lab Integrated Serv Networks, Xian 710071, Peoples R China
[2] Xian Commun Inst, Xian 710106, Peoples R China
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2017年 / 66卷 / 06期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Amplify-and-forward (AF); distributed relay selection; low-complexity; physical-layer security; two-way relaying (TWR); PHYSICAL LAYER SECURITY; COOPERATIVE NETWORKS; OUTAGE PERFORMANCE; JAMMER SELECTION;
D O I：
10.1109/TVT.2016.2621126
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper focuses on the complexity issue of relay selection for fifth-generation (5G) large-scale secure two-way amplify-and-forward (TWR-AF) relay systems with massive relays and eavesdroppers. A novel and distributed relay selection criterion [i.e., low-complexity relay selection criterion (LRSC)] is proposed to maximize the overall secrecy performance. Utilizing LRSC, the calculations of sources' received signal-to-noise ratios (SNRs), the channel estimation, and the knowledge of the relay-eavesdropper links are not required. Particularly, a relay is selected based on the received power of relays and the average knowledge of the source-eavesdropper links. These low-complexity properties make LRSC more attractive for 5G large-scale networks. Moreover, the secrecy outage probability and the impact of the eavesdropper density on the secrecy performance are presented, and some useful insights are obtained. Simulation results highlight the effectiveness of our relay selection design.
引用
收藏
页码：5462 / 5466
页数：5
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