Fuzzy Logic Based Multi-Criterion User Selection and Resource Allocation for Green Coordinated NOMA.
IEEE Global Communications Conference(2018)
摘要
Combining non-orthogonal multiple access (NOMA) with coordination techniques among base stations (BSs) is a promising solution to enhance spectral efficiency and alleviate inter-cell interference of cell-edge users in 5th generation (5G) networks. In this paper, we consider a multi-cell NOMA network with coordinated BSs in the downlink, and investigate its user coordination mode selection and resource allocation to achieve a green system. A fuzzy logic (FL) based multi-criterion scheme is proposed for user coordination mode selection. It is more robust against shadowing and fading than the previous selection schemes that classify coordinated and non-coordinated users by a single criterion. Also, the FL ranking list is fed into subcarrier allocation, leading to significant reduction in searching complexity of subcarrier allocation. A dramatic performance enhancement is achieved over the previous schemes based on single-criterion, in terms of transmission power and energy efficiency.
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关键词
multicell NOMA network,user coordination mode selection,resource allocation,fuzzy logic based multicriterion scheme,green coordinated NOMA,base stations,inter-cell interference,cell-edge users,5th generation networks,nonorthogonal multiple access
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