Energy-Efficient Adaptive Sectorization for 5G Green Wireless Communication Systems

Jain, Preksha; Gupta, Akhil

doi:10.1109/jsyst.2019.2927718

Cited by 17 publications

(5 citation statements)

References 36 publications

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“…Also, they considered antennas to be omnidirectional, which results in increased interference. While some scheme uses the direction and directive beam width of the antenna [32]. The nth relay beam width and beam direction are denoted by θ n and Ð n degrees, respectively.…”

Section: Selection Of Relaymentioning

confidence: 99%

Evaluation of antenna and relay scheme for cooperative non‐orthogonal multiple access

Balyan

2023

IET Networks

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An antenna selection followed by a relay selection scheme (ASRS) is proposed for cooperative non‐orthogonal multiple access (NOMA)‐based network. The proposed work selects an antenna to maximise the instantaneous rate of poor channel condition users while providing good quality of services (QoS). The outage probability performance of the proposed scheme is plotted for different antenna configuration while varying the SNR and distance with variable number of antennas and available relays. The fairness factor of the proposed work is also discussed, considering three different density areas. The proposed scheme is compared with novel schemes in literature for average sum rate and average energy efficiency to show its superiority.

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Section: Selection Of Relaymentioning

confidence: 99%

Evaluation of antenna and relay scheme for cooperative non‐orthogonal multiple access

Balyan

2023

IET Networks

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“…The set of

cell-edge users is represented as ƣ = {

}. The cell-edge users are grouped in clusters using the angle selection scheme (ASS) [ 22 , 23 , 24 , 25 , 26 , 27 ] and a total of

clusters are assumed. All the users are assumed to be moving with a velocity

m/s.…”

Section: System Modelmentioning

confidence: 99%

Massive MIMO NOMA: Double-Mode Model towards Green 5G Networks

Jain

Gupta

Tanwar

et al. 2023

Sensors

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With the development of the Internet of Things (IoT), the number of devices will also increase tremendously. However, we need more wireless communication resources. It has been shown in the literature that non-orthogonal multiple access (NOMA) offers high multiplexing gains due to the simultaneous transfer of signals, and massive multiple-input–multiple-outputs (mMIMOs) offer high spectrum efficiency due to the high antenna gain and high multiplexing gains. Therefore, a downlink mMIMO NOMA cooperative system is considered in this paper. The users at the cell edge in 5G cellular system generally suffer from poor signal quality as they are far away from the BS and expend high battery power to decode the signals superimposed through NOMA. Thus, this paper uses a cooperative relay system and proposes the mMIMO NOMA double-mode model to reduce battery expenditure and increase the cell edge user’s energy efficiency and sum rate. In the mMIMO NOMA double-mode model, two modes of operation are defined. Depending on the relay’s battery level, these modes are chosen to utilize the system’s energy efficiency. Comprehensive numerical results show the improvement in the proposed system’s average sum rate and average energy efficiency compared with a conventional system. In a cooperative NOMA system, the base station (BS) transmits a signal to a relay, and the relay forwards the signal to a cluster of users. This cluster formation depends on the user positions and geographical restrictions concerning the relay equipment. Therefore, it is vital to form user clusters for efficient and simultaneous transmission. This paper also presents a novel method for efficient cluster formation.

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“…Unlike OMA, NOMA ensures fairness amongst the users with its power allocation strategies. The fairness factor [ 28 ] for

cell-edge users described by Jains’ Fairness, is given as:

…”

Section: System Analysismentioning

confidence: 99%

Performance Evaluation of Cooperative OMA and NOMA Systems in 6G Deployment Scenarios

Jain

Gupta

Kumar

et al. 2022

Sensors

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Optimization of the energy efficiency, fairness, and rates of the system is a vital part of communication systems. Multiple access techniques have a huge potential to enhance such performance parameters. This paper studies the performance of NOMA and OMA systems in a singular cell environment, where the cellular users are distributed randomly, and cooperative relays are considered for better system reliability. The relay nodes forward the signals to the cell-edge users. This paper considers a practical scenario where all the relay equipment is distributed with non-uniform battery power levels. The performance of OMA and NOMA schemes is compared based on the key performance indicators: sum rate, fairness, and energy efficiency. The fairness factor determines fairness in the allocation of resources to all the system’s users. The performance of the two schemes is assessed in three deployment scenarios: urban, suburban, and rural scenarios. Through numerical results, it is proved that the performance of the NOMA dominates the OMA scheme.

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Energy-Efficient Adaptive Sectorization for 5G Green Wireless Communication Systems

Cited by 17 publications

References 36 publications

Evaluation of antenna and relay scheme for cooperative non‐orthogonal multiple access

Evaluation of antenna and relay scheme for cooperative non‐orthogonal multiple access

Massive MIMO NOMA: Double-Mode Model towards Green 5G Networks

Performance Evaluation of Cooperative OMA and NOMA Systems in 6G Deployment Scenarios

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