Open AccessNOMA inspired multicasting in cognitive radio networks
Author(s) -
Bhattacharjee Sangeeta,
Acharya Tamaghna,
Bhattacharya Uma
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2018.5335
Subject(s) - multicast , computer science , cognitive radio , computer network , noma , transmission (telecommunications) , base station , fading , relay , ergodic theory , telecommunications , telecommunications link , physics , wireless , mathematics , channel (broadcasting) , power (physics) , mathematical analysis , quantum mechanics
This study outlines a non‐orthogonal multiple access (NOMA) scheme for cooperative multicasting in a cognitive radio network. The network consists of a common base station (BS), which serves a primary user multicast group (PU‐MG) and a secondary user MG (SU‐MG). The SU‐MG is located in between the BS and the PU‐MG. Their proposed spectrum sharing protocol comprises of three transmission phases. The first phase is utilised by the BS for multicasting both PUs' and SUs' signals, using NOMA transmission. In the second phase, to overcome fading impairments, the BS exploits spatial diversity among SUs, by seeking their cooperation to relay PUs' message signal. The BS, as an incentive, leases a time slot in the third phase, exclusively for supporting multicast to SU‐MG over PUs' licenced spectrum. Analytical expressions for outage probabilities of both PU‐MG and SU‐MG are derived and validated using simulations. Furthermore, outage performance of PUs and ergodic capacity of SUs are compared with a prominent recent scheme.