Resource Allocation for NOMA-Based D2D Systems Coexisting With Cellular Networks

This paper describes a nonorthogonal multiple access (NOMA)-based device-to-device (D2D) communication system underlaying in a cellular network sharing time and frequency resource. To optimize the total transmit power for all users in the network, we investigate a comprehensive resource allocation s...

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Bibliographic Details
Published inIEEE access Vol. 6; pp. 66293 - 66304
Main Authors Yoon, Taehyun, Nguyen, Tien Hoa, Nguyen, Xuan Tung, Yoo, Daeseung, Jang, Byungtae, Nguyen, Van Duc
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Cellular communication
Communications systems
D2D communications
Device-to-device communication
Downlink
Electronic devices
Interference
Mixed integer
NOMA
Nonorthogonal multiple access
Optimization
Power control
quality of service
Resource allocation
Resource management
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Summary:This paper describes a nonorthogonal multiple access (NOMA)-based device-to-device (D2D) communication system underlaying in a cellular network sharing time and frequency resource. To optimize the total transmit power for all users in the network, we investigate a comprehensive resource allocation solution consisting of joint subchannel assignments, user pairings, and power control. The optimization problem is a mixed integer linear program, which is solved in three low-complexity steps. We first group D2D users to minimize mutual interference from cellular users (CU). Second, we demonstrate a heuristic solution for coupling D2D users in each group. Finally, we minimize the total transmit power of all devices in the network while maintaining the SINR requirements for both CU and D2D users. The optimal solution is derived off-line using the Rayleigh fading channels for any given QoS level of CU and NOMA-D2D users. We recognize that both subchannel assignment and user pairings play the important roles in reducing the total transmit power of the network, in which both cellular and D2D users coexist. However, optimization of the subchannel assignment contributes more toward minimizing the total network transmit power than the proposed model of optimizing user pairings.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2018.2876354