Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - On the Impact of User Scheduling on Diversity and Fairness in Cooperative NOMA
AU - Yang, L.
AU - Jiang, H.
AU - Ye, Q.
AU - Ding, Z.
AU - Lv, L.
AU - Chen, J.
PY - 2018/11/12
Y1 - 2018/11/12
N2 - In this correspondence paper, we investigate the problem of user scheduling in a cooperative non-orthogonal multiple access (NOMA) system consisting of a base station, a weak user, and K intermediate users. During each transmission, an intermediate user is scheduled to receive its own message and forward the message destined for the weak user. For this type of cooperative NOMA system, a novel scheduling scheme is proposed to achieve full diversity and scheduling fairness simultaneously. With the consideration that all channels experience independent but non-identically distributed Rayleigh fading, outage probabilities of the weak user and the scheduled intermediate user are derived in closed-form expressions. It is theoretically shown that the proposed scheme provides full diversity for both the weak user and the scheduled intermediate user. Furthermore, theoretical results also demonstrate that the proposed scheme schedules each intermediate user with the same probability 1/K, demonstrating that scheduling fairness is also guaranteed.
AB - In this correspondence paper, we investigate the problem of user scheduling in a cooperative non-orthogonal multiple access (NOMA) system consisting of a base station, a weak user, and K intermediate users. During each transmission, an intermediate user is scheduled to receive its own message and forward the message destined for the weak user. For this type of cooperative NOMA system, a novel scheduling scheme is proposed to achieve full diversity and scheduling fairness simultaneously. With the consideration that all channels experience independent but non-identically distributed Rayleigh fading, outage probabilities of the weak user and the scheduled intermediate user are derived in closed-form expressions. It is theoretically shown that the proposed scheme provides full diversity for both the weak user and the scheduled intermediate user. Furthermore, theoretical results also demonstrate that the proposed scheme schedules each intermediate user with the same probability 1/K, demonstrating that scheduling fairness is also guaranteed.
KW - cooperative communication
KW - multi-access systems
KW - probability
KW - Rayleigh channels
KW - telecommunication scheduling
KW - cooperative NOMA system
KW - cooperative nonorthogonal multiple access system
KW - intermediate user scheduling scheme
KW - outage probabilities
KW - nonidentically distributed Rayleigh fading
KW - NOMA
KW - Signal to noise ratio
KW - Power system reliability
KW - Probability
KW - Relays
KW - Base stations
KW - Fading channels
KW - Cooperative non-orthogonal multiple access
KW - fairness
KW - user scheduling
U2 - 10.1109/TVT.2018.2869770
DO - 10.1109/TVT.2018.2869770
M3 - Journal article
VL - 67
SP - 11296
EP - 11301
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
SN - 0018-9545
IS - 11
ER -