TY - JOUR
T1 - Performance Analysis of STAR-RIS Assisted Secure Cognitive NOMA-HARQ Networks
AU - Sheng, Xin
AU - Li, Xingwang
AU - Chen, Gaojie
AU - Huang, Gaojian
AU - Han, Congzheng
AU - Ding, Zhiguo
N1 - Publisher Copyright:
© 2012 IEEE.
PY - 2024/3/1
Y1 - 2024/3/1
N2 - In this letter, we carry out the performance analysis of the simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) in the hybrid automatic repeat request (HARQ) assisted cognitive non-orthogonal multiple access (NOMA) networks, where a security-required user (SRU) with secure transmission requirements is paired with a quality of service (QoS)-sensitive user (QSU) with low delay requirements to perform NOMA. To characterize the performance of secure transmission, we derive the analytical expressions for connection outage probability (COP), average number of transmission (ANT) and secrecy outage probability (SOP) for the SRU in randomized retransmission NOMA (RR-NOMA) scheme, while a cognitive power allocation scheme is developed to meet QSU's QoS requirement. To obtain deeper insights, the asymptotic expressions of COP and SOP are also derived. Furthermore, some significant results are drawn from simulations: 1) There exist a balance between COP and ANT, COP and SOP, which are denoted by the security-reliability balance (SRB) and reliability-delay balance (RDB), respectively. 2) HARQ is benefit to improve the RDB and SRB performance of SRU. 3) The increase in the number of STAR-RIS elements {K} improves the system reliability performance, while the secrecy performance deteriorates.
AB - In this letter, we carry out the performance analysis of the simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) in the hybrid automatic repeat request (HARQ) assisted cognitive non-orthogonal multiple access (NOMA) networks, where a security-required user (SRU) with secure transmission requirements is paired with a quality of service (QoS)-sensitive user (QSU) with low delay requirements to perform NOMA. To characterize the performance of secure transmission, we derive the analytical expressions for connection outage probability (COP), average number of transmission (ANT) and secrecy outage probability (SOP) for the SRU in randomized retransmission NOMA (RR-NOMA) scheme, while a cognitive power allocation scheme is developed to meet QSU's QoS requirement. To obtain deeper insights, the asymptotic expressions of COP and SOP are also derived. Furthermore, some significant results are drawn from simulations: 1) There exist a balance between COP and ANT, COP and SOP, which are denoted by the security-reliability balance (SRB) and reliability-delay balance (RDB), respectively. 2) HARQ is benefit to improve the RDB and SRB performance of SRU. 3) The increase in the number of STAR-RIS elements {K} improves the system reliability performance, while the secrecy performance deteriorates.
KW - Cognitive NOMA
KW - HARQ
KW - physical layer security (PLS)
KW - simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)
UR - http://www.scopus.com/inward/record.url?scp=85179821745&partnerID=8YFLogxK
U2 - 10.1109/LWC.2023.3340135
DO - 10.1109/LWC.2023.3340135
M3 - Article
AN - SCOPUS:85179821745
SN - 2162-2337
VL - 13
SP - 696
EP - 700
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 3
ER -