Cooperative Non-Orthogonal Layered Multicast Multiple Access for Heterogeneous Networks

This paper proposes a novel design of cooperative non-orthogonal layered multicast multiple access in a heterogeneous network, where the information is encoded into the messages of high priority (HP) and low priority (LP). Two types of multicast users coexist in the network: 1) regular users (RUs),...

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Bibliographic Details
Published in:IEEE transactions on communications 2019-02, Vol.67 (2), p.1148-1165
Main Authors: Yang, Long, Ni, Qiang, Lv, Lu, Chen, Jian, Xue, Xuan, Zhang, Hailin, Jiang, Hai
Format: Article
Language:English
Subjects:
Coding
Cooperative non-orthogonal multiple access
Energy conservation
Energy consumption
energy saving
layered multicast
Messages
Multicasting
NOMA
Nonorthogonal multiple access
outage probability
Power system reliability
Probability
Quality of service
Relays
Reliability
Wireless communication
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Summary:This paper proposes a novel design of cooperative non-orthogonal layered multicast multiple access in a heterogeneous network, where the information is encoded into the messages of high priority (HP) and low priority (LP). Two types of multicast users coexist in the network: 1) regular users (RUs), which are located far away from the base station (BS) and expect to decode only the HP message (due to the weak channels), and 2) advanced users (AUs), which are located close to the BS and expect to decode both HP and LP messages. To improve the reliability of layered multicast, we consider that the successful AUs (those AUs who successfully decode the HP and LP messages) serve as potential relays to assist other AUs/RUs. Based on this idea, two novel cooperation strategies are proposed for different cases of channel information availability. For each proposed strategy, we derive closed-form exact outage probabilities of AUs and RUs and then further analyze their diversity orders. Moreover, considering that the layered multicast is outage-constrained, we theoretically evaluate the energy consumption of both strategies and demonstrate their energy saving gains over the direct non-orthogonal multiple access for layered multicast. Finally, our theoretical analysis is verified by numerical results, and the advantages of the proposed strategies are also demonstrated.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2018.2874239