scholarly journals Energy-Efficient Downlink for Non-Orthogonal Multiple Access with SWIPT under Constrained Throughput

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 107
Author(s):  
Admoon Andrawes ◽  
Rosdiadee Nordin ◽  
Nor Fadzilah Abdullah
Keyword(s):  
Outage Probability ◽  
Energy Efficient ◽  
Multiple Access ◽  
Optimization Technique ◽  
Power Splitting ◽  
Access Technology ◽  
Radio Access Technology ◽  
Fifth Generation ◽  
Radio Access ◽  
High Spectral Efficiency

Non-Orthogonal Multiple Access (NOMA) has been proposed recently as an emerging radio access technology for the Fifth Generation (5G) to achieve high spectral efficiency (SE). In addition, simultaneous wireless information and power transfer (SWIPT) has been receiving exceptional attention because of its role in increasing energy efficiency (EE). In this paper, the performance of the downlink SWIPT-NOMA system has been evaluated. In this paper, signal to interference and noise ratio (SINR) is derived for near and far users with outage probability for each user, where the near user acts as an energy harvesting (EH) node. The Genetic algorithm (GA) is used as an optimization technique for the power splitting ratio and power allocation coefficients to maximize the EE under eligible SE. The outage probability for the near and far user is taken into consideration for the optimization process. In this work, the results from the SE–EE metric show that the maximum EE reached 0.325 Mbits/J at SE of 9 bits/sec/Hz.

scholarly journals Analysis of 5G New Radio Uplink Signals on an Analogue-RoF System Based on DSP-Assisted Channel Aggregation

2018 ◽  
Vol 9 (1) ◽  
pp. 47 ◽  
Author(s):  
Befekadu Mengesha ◽  
Pablo Torres-Ferrera ◽  
Roberto Gaudino
Keyword(s):  
Multiple Access ◽  
Digital Signal ◽  
Efficiency Gain ◽  
Error Vector Magnitude ◽  
Access Technology ◽  
Radio Access Technology ◽  
Performance Requirements ◽  
Radio Access ◽  
New Radio ◽  
Aggregation Techniques

The 3rd Generation Partnership Project (3GPP) is in the process of developing 5th generation (5G) radio access technology, the so-called new radio (NR). The aim is to achieve the performance requirements forIMT-2020 radio interface technology. In this paper, we focus on the analysis of the transmission of 5G NR uplink physical channels, such as physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH), dedicated for data and control channels, respectively, as specified in the 3GPP standard, using digital signal processing (DSP)-assisted frequency division multiple access (FDMA) and time division multiple access (TDMA) channel aggregation techniques on an analogue radio-over-fiber (A-RoF) architecture. We verified that there is ~34% spectral efficiency gain and lower error vector magnitude (EVM) achieved using the TDMA technique.

scholarly journals Programmability of Connectivity Control

2021 ◽  
Vol 27 (2) ◽  
pp. 78-85
Author(s):  
Ivaylo I. Atanasov ◽  
Evelina N. Pencheva
Keyword(s):  
Access Network ◽  
Edge Computing ◽  
Core Network ◽  
Access Technology ◽  
Radio Access Network ◽  
Radio Access Technology ◽  
Fifth Generation ◽  
Radio Access ◽  
Multi Access ◽  
Network Interfaces

Network programmability and edge computing as key features of next generation communications enable innovative services. While the programmability is focused on the core network of the fifth-generation system, the edge computing moves the network intelligence to the radio access network. This paper presents a study on the programmability of connectivity control as a function of radio access network using Multi-access Edge Computing. The capability of using more than one radio access technology simultaneously enhances reliability and increases the throughput, especially in dense networks. Opening the radio access network interfaces for programmability of multi-connectivity enables analytics applications to control the device connections to multiple radio links simultaneously based on information of radio conditions, user location or specific policies. The research novelty is in opening the radio access network interfaces for edge applications to access connectivity control.

Design of a miniature dual-band bandpass filter with interlocked stepped-impedance resonators for 5G new radio access technology

2020 ◽  
Vol 12 (8) ◽  
pp. 733-737
Author(s):  
Wei-Lun Hsu ◽  
Pei-Yu Lyu ◽  
Sheng-Fuh Chang
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Access Technology ◽  
Transmission Zeros ◽  
Radio Access Technology ◽  
Fifth Generation ◽  
Radio Access ◽  
New Radio ◽  
Design Competition ◽  
Insertion Losses

AbstractA miniature dual-band bandpass filter with interlocked stepped-impedance resonators (SIRs) is presented in this paper, which was designed for the student design competition held in European Microwave Week 2019. This bandpass filter is required to have two concurrent passbands, namely, the first passband at 900–1000 MHz and the second passband at 1427–1518 MHz bands, which cover six designated bands in sub-6 GHz range of fifth generation (5G) New Radio Access Technology. Three stopbands are required at 500–850, 1050–1350, and 1600–2000 MHz, respectively. To achieve the best figure of merit, an interlocked configuration of two SIRs is proposed. One advantage is that the impedance ratio of the inter-locked SIR can be controlled to have two passbands at the required frequencies. Second, the coupling section of the interlocked SIR gives three transmission zeros distributed to every stopbands such that the stopband suppression are dramatically enhanced. The measured results show that the passband insertion losses are 2.16 dB at the first passband and 1.33 dB at the second passband, and the return losses are greater than 10 dB. The stopband suppression at the transmission zeros are greater than 38 dB. The circuit is very compact as 41.40 × 19.96 mm2, equivalent to $0.25 \times 0.12\,\lambda _g^2$.

scholarly journals Threshold-based Wireless-based NOMA Systems over Log-Normal Channels: Ergodic Outage Probability of Joint Time Allocation and Power Splitting Schemes

2021 ◽  
Vol 27 (3) ◽  
pp. 78-83
Author(s):  
Hoang Thien Van ◽  
Quyet-Nguyen Van ◽  
Danh Hong Le ◽  
Lukas Sevcik ◽  
Nguyen Hoang Duy ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Outage Probability ◽  
Fading Channels ◽  
Time Allocation ◽  
Power Splitting ◽  
Fifth Generation ◽  
Radio Access ◽  
Promising Solution ◽  
Indoor Scenarios ◽  
Log Normal

Due to the development of state-of-the-art fifth-generation communication (5G) and Internet-of-Things (IoT), the demands for capacity and throughput of wireless networks have increased significantly. As a promising solution for this, a radio access technique, namely, non-orthogonal multiple access (NOMA) has been investigated. Particularly, in this paper, we analyse the system performance of a joint time allocation and power splitting (JTAPS) protocol for NOMA-based energy harvesting (EH) wireless networks over indoor scenarios, which we modelled with log-normal fading channels. Accordingly, for the performance analysis of such networks, the analytical expression of a metric so-called “ergodic outage probability” was derived. Then, thanks to Monte Carlo simulations done in Matlab, we are able to see how different EH power splitting (PS) and EH time switching (TS) factors influence the ergodic outage probability. Last, but not least, we plot the simulation results along with the theoretical results for comparison studies.

scholarly journals User-Centric Radio Access Technology Selection: A Survey of Game Theory Models and Multi-Agent Learning Algorithms

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Giuseppe Caso ◽  
Ozgu Alay ◽  
Guido Carlo Ferrante ◽  
Luca De Nardis ◽  
Maria-Gabriella Di Benedetto ◽  
...  
Keyword(s):  
Game Theory ◽  
Learning Algorithms ◽  
Technology Selection ◽  
Access Technology ◽  
Radio Access Technology ◽  
Radio Access ◽  
Agent Learning ◽  
Multi Agent ◽  
User Centric ◽  
Radio Access Technology Selection

scholarly journals Revenue-Maximizing Radio Access Technology Selection with Net Neutrality Compliance in Heterogeneous Wireless Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Elissar Khloussy ◽  
Yuming Jiang
Keyword(s):  
Service Providers ◽  
Blocking Probability ◽  
Heterogeneous Wireless Networks ◽  
Technology Selection ◽  
The Internet ◽  
Net Neutrality ◽  
Internet Service ◽  
Access Technology ◽  
Radio Access Technology ◽  
Radio Access

The net neutrality principle states that users should have equal access to all Internet content and that Internet Service Providers (ISPs) should not practice differentiated treatment on any of the Internet traffic. While net neutrality aims to restrain any kind of discrimination, it also grants exemption to a certain category of traffic known as specialized services (SS), by allowing the ISP to dedicate part of the resources for the latter. In this work, we consider a heterogeneous LTE/WiFi wireless network and we investigate revenue-maximizing Radio Access Technology (RAT) selection strategies that are net neutrality-compliant, with exemption granted to SS traffic. Our objective is to find out how the bandwidth reservation for SS traffic would be made in a way that allows maximizing the revenue while being in compliance with net neutrality and how the choice of the ratio of reserved bandwidth would affect the revenue. The results show that reserving bandwidth for SS traffic in one RAT (LTE) can achieve higher revenue. On the other hand, when the capacity is reserved across both LTE and WiFi, higher social benefit in terms of number of admitted users can be realized, as well as lower blocking probability for the Internet access traffic.

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