Novel Relay Selection Strategies for Cooperative NOMA

In this paper, we consider non-orthogonal multiple access (NOMA) relaying networks, where one base station communicates with two mobile users with the aid of multiple relays. We propose a two-stage relay selection strategy for NOMA networks with decode-and-forward (DF) and amplify-and-forward (AF) r...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2017-11, Vol.66 (11), p.10114-10123
Main Authors: Yang, Zheng, Ding, Zhiguo, Wu, Yi, Fan, Pingzhi
Format: Article
Language:English
Subjects:
amplify-and-forward
Computer simulation
Cooperative non-orthogonal multiple access
decode-and-forward
Mobile communication systems
Networks
NOMA
Nonorthogonal multiple access
outage probability
Power system reliability
Probability
Protocol (computers)
Quality of service
Radio equipment
Relay
Relaying
Relays
Resource management
Signal to noise ratio
User requirements
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Summary:In this paper, we consider non-orthogonal multiple access (NOMA) relaying networks, where one base station communicates with two mobile users with the aid of multiple relays. We propose a two-stage relay selection strategy for NOMA networks with decode-and-forward (DF) and amplify-and-forward (AF) relaying protocols with different quality of service requirements at the users, respectively. Then, the outage probabilities of the NOMA two-stage DF and AF schemes are obtained in closedform expressions, and the diversity order is determined based on their asymptotic expressions at high signal-to-noise ratio. Both of the developed analytical results and carried out computer simulations show that NOMA two-stage DF (AF) relaying is superior to existing relay selection strategies developed for cooperative NOMA and orthogonal multiple access networks.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2017.2752264