Energy efficiency maximization in the uplink Delta-OMA networks
Hashemi, Ramin; Beyranvand, Hamzeh; Mili, Mohammad Robat; Khalili, Ata; Tabassum, Hina; Ng, Derrick Wing Kwan (2021-07-14)
R. Hashemi, H. Beyranvand, M. R. Mili, A. Khalili, H. Tabassum and D. W. K. Ng, "Energy Efficiency Maximization in the Uplink Delta-OMA Networks," in IEEE Transactions on Vehicular Technology, vol. 70, no. 9, pp. 9566-9571, Sept. 2021, doi: 10.1109/TVT.2021.3097128
© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2021122162468
Tiivistelmä
Abstract
Delta-orthogonal multiple access (D-OMA) has been recently investigated as a potential technique to enhance the spectral efficiency in the sixth-generation (6G) networks. D-OMA enables partial overlapping of the adjacent sub-channels that are assigned to different clusters of users served by non-orthogonal multiple access (NOMA), at the expense of additional interference. In this paper, we analyze the performance of D-OMA in the uplink and develop a multi-objective optimization framework to maximize the uplink energy efficiency (EE) in a multi-access point (AP) network enabled by D-OMA. Specifically, we optimize the sub-channel and transmit power allocations of the users as well as the overlapping percentage of the spectrum between the adjacent sub-channels. The formulated problem is a mixed binary non-linear programming problem. Therefore, to address the challenge we first transform the problem into a single-objective problem using Tchebycheff method. Then, we apply the monotonic optimization (MO) to explore the hidden monotonicity of the objective function and constraints, and reformulate the problem into a standard MO in canonical form. The reformulated problem can be solved by applying the outer polyblock approximation method. Our numerical results show that D-OMA outperforms the conventional non-orthogonal multiple access (NOMA) and orthogonal frequency division multiple access (OFDMA) when the adjacent sub-channel overlap and scheduling are optimized jointly.
Kokoelmat
- Avoin saatavuus [31657]