TY - GEN
T1 - On physical layer security of multiple-relay assisted NOMA systems
AU - Lei, Hongjiang
AU - Yang, Zixuan
AU - Park, Ki Hong
AU - Ansari, Imran Shafique
AU - Pan, Gaofeng
AU - Alouini, Mohamed Slim
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - This paper considers the secrecy outage performance of a multiple-relay assisted non-orthogonal multiple access (NOMA) network over Rayleigh fading channels. Two slots are utilized to transmit signals from the base station to destination. In the first slot, the base station broadcasts the superposition signal of two users to all decode-and-forward relays by message mapping strategy. Then the selected relay transmits superposition signal to the two users via power-domain NOMA. Two relay selection (RS) schemes, i.e., optimal single relay selection (OSRS) scheme and two-step single relay selection (TSRS) scheme, are proposed. As a benchmark, we also examine the secrecy outage performance of the traditional multiple relays combining (TMRC) scheme. The closed- form expressions for the security outage probability (SOP) of the proposed schemes are derived and validated via simulations. To get more insights, we also derive the closed-form expressions for the asymptotic SOP for all the schemes with fixed and dynamic power allocations. Monte-Carlo simulations are performed to verify our analytical results.
AB - This paper considers the secrecy outage performance of a multiple-relay assisted non-orthogonal multiple access (NOMA) network over Rayleigh fading channels. Two slots are utilized to transmit signals from the base station to destination. In the first slot, the base station broadcasts the superposition signal of two users to all decode-and-forward relays by message mapping strategy. Then the selected relay transmits superposition signal to the two users via power-domain NOMA. Two relay selection (RS) schemes, i.e., optimal single relay selection (OSRS) scheme and two-step single relay selection (TSRS) scheme, are proposed. As a benchmark, we also examine the secrecy outage performance of the traditional multiple relays combining (TMRC) scheme. The closed- form expressions for the security outage probability (SOP) of the proposed schemes are derived and validated via simulations. To get more insights, we also derive the closed-form expressions for the asymptotic SOP for all the schemes with fixed and dynamic power allocations. Monte-Carlo simulations are performed to verify our analytical results.
UR - http://www.scopus.com/inward/record.url?scp=85070284110&partnerID=8YFLogxK
U2 - 10.1109/ICCW.2019.8756959
DO - 10.1109/ICCW.2019.8756959
M3 - Conference contribution
AN - SCOPUS:85070284110
T3 - 2019 IEEE International Conference on Communications Workshops, ICC Workshops 2019 - Proceedings
BT - 2019 IEEE International Conference on Communications Workshops, ICC Workshops 2019 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Conference on Communications Workshops, ICC Workshops 2019
Y2 - 20 May 2019 through 24 May 2019
ER -
