A Geometric Approach for Optimal Power Control and Relay Selection in NOMA Wireless Relay Networks

Gau, Rung-Hung; Chiu, Hsiao-Ting; Liao, Chien-Hsun

doi:10.1109/tcomm.2020.2965526

Cited by 11 publications

(2 citation statements)

References 52 publications

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“…NOMA power-domain utilises the users' power-difference to identify various users concerning successive interference cancellation (SIC) at the receiver side. The NOMA Code-domain is comparable to CDMA or multi-carrier CDMA (MC-CDMA) unless its decision to employ the low-density sequences or non-orthogonal sequences has a low cross-correlation [50].…”

Section: Principle Of Noma Systemmentioning

confidence: 99%

Analysis of Power Allocation for NOMA-Based D2D Communications Using GADIA

2021

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The new era of IoT brings the necessity of smart synergy for diverse communication and computation entities. The two extremes are, on the one hand, the 5G Ultra-Reliable Low-Latency Communications (URLLC) required for Industrial IoT (IIoT) and Vehicle Communications (V2V, V2I, V2X). While on the other hand, the Ultra-Low Power, Wide-Range, Low Bit-rate Communications, such as Sigfox, LoRa/LoRaWAN, NB-IoT, Cat-M1, etc.; used for smart metering, smart logistics, monitoring, alarms, tracking applications. This extreme variety and diversity must work in synergy, all inter-operating/inter-working with the Internet. The communication solutions must mutually cooperate, but there must be a synergy in a broader sense that includes the various communication solutions and all the processing and storage capabilities from the edge cloud to the deep-cloud. In this paper, we consider a non-orthogonal multiple access (NOMA)-based device to device (D2D) communication system coexisting with a cellular network and utilize Greedy Asynchronous Distributed Interference Avoidance Algorithm (GADIA) for dynamic frequency allocation strategy. We analyze a max–min fairness optimization problem with energy budget constraints to provide a reasonable boundary rate for the downlink to all devices and cellular users in the network for a given total transmit power. A comprehensive simulation and numerical evaluation is performed. Further, we compare the performance of maximum achievable rate and energy efficiency (EE) at a given spectral efficiency (SE) while employing NOMA and orthogonal frequency-division multiple access (OFDMA).

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Section: Principle Of Noma Systemmentioning

confidence: 99%

Analysis of Power Allocation for NOMA-Based D2D Communications Using GADIA

2021

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“…In addition, NOMA concepts are considered in conjunction with other techniques, such as MIMO or mmWave [4,18]. Many previous works have investigated the potential contributions of NOMA technology for 5G-and-beyond wireless networks [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Max–Min Fairness Optimization for D2D Communications Coexisting with Cellular Networks

Nguyen

et al. 2020

Electronics

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This paper considers a system consisting of a nonorthogonal multiple access (NOMA)-based device-to-device (D2D) communication system within a cellular network, in which the time and frequency resources are shared by everyone. In particular, D2D groups that constitute different pairs are assigned to the subchannels that the cellular users occupy. A max–min fairness optimization problem with power budget constraints is formulated and solved in this paper to reduce the mutual interference between the cellular users and D2D devices that substantially impacts that with the worst channel condition. For a low computational complexity solution, we propose the use of the bisection method together with the solution of a system of linear equalities. The proposed algorithm can provide uniformly good service to all of the cellular users and D2D devices in the coverage area by utilizing the minimal total transmit power. The simulation results indicate the effectiveness of the proposed algorithm in the improvement of the spectral efficiency of the worst user under the different widely used subchannel assignments and pairing techniques.

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