Sub-Channel Assignment, Power Allocation, and User Scheduling for Non-Orthogonal Multiple Access Networks

In this paper, we study the resource allocation and user scheduling problem for a downlink non-orthogonal multiple access network where the base station allocates spectrum and power resources to a set of users. We aim to jointly optimize the sub-channel assignment and power allocation to maximize th...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2016-11, Vol.15 (11), p.7686-7698
Main Authors: Di, Boya, Song, Lingyang, Li, Yonghui
Format: Article
Language:English
Subjects:
Algorithms
Complexity theory
Games
Interference
Matching
matching game
NOMA
Non-orthogonal multiple access
Nonorthogonal multiple access
Radio equipment
Receivers
Resource allocation
Resource management
Resource scheduling
scheduling problem
Silicon carbide
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Summary:In this paper, we study the resource allocation and user scheduling problem for a downlink non-orthogonal multiple access network where the base station allocates spectrum and power resources to a set of users. We aim to jointly optimize the sub-channel assignment and power allocation to maximize the weighted total sum-rate while taking into account user fairness. We formulate the sub-channel allocation problem as equivalent to a many-to-many two-sided user-subchannel matching game in which the set of users and sub-channels are considered as two sets of players pursuing their own interests. We then propose a matching algorithm, which converges to a two-side exchange stable matching after a limited number of iterations. A joint solution is thus provided to solve the sub-channel assignment and power allocation problems iteratively. Simulation results show that the proposed algorithm greatly outperforms the orthogonal multiple access scheme and a previous non-orthogonal multiple access scheme.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2016.2606100