scholarly journals Point-to-Multipoint Communication Enablers for the Fifth Generation of Wireless Systems

2018 ◽  
Vol 2 (1) ◽  
pp. 53-59 ◽  
Author(s):  
David Gomez-Barquero ◽  
David Navratil ◽  
Steve Appleby ◽  
Matt Stagg
Keyword(s):  
Wireless Systems ◽  
Fifth Generation

scholarly journals An XGB-Based Reliable Transmission Method in the mMTC Scenarios

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Tongyi Zheng ◽  
Lei Ning ◽  
Qingsong Ye ◽  
Fan Jin
Keyword(s):  
Internet Of Things ◽  
Wireless Systems ◽  
Application Layer ◽  
Transmission Method ◽  
Machine Type ◽  
Fifth Generation ◽  
Trip Time ◽  
Time Out ◽  
Machine Type Communications ◽  
And Performance

Massive machine-type communications (mMTCs) for Internet of things are being developed thanks to the fifth-generation (5G) wireless systems. Narrowband Internet of things (NB-IoT) is an important communication technology for machine-type communications. It supports many different protocols for communication. The reliability and performance of application layer communication protocols are greatly affected by the retransmission time-out (RTO) algorithm. In order to improve the reliability and performance of machine-type communications, this study proposes a novel RTO algorithm UDP-XGB based on the user datagram protocol (UDP) and NB-IoT. It combines traditional algorithms with machine learning. The simulation results show that real round-trip time (RTT) is close to the RTO, which is obtained by this algorithm, and the reliability and performance of machine-type communications have improved.

Examination of a non-orthogonal multiple access scheme for next generation wireless networks

2020 ◽  
pp. 154851292095127
Author(s):  
Ravi Shankar
Keyword(s):  
Multiple Access ◽  
High Performance ◽  
High Reliability ◽  
Wireless Systems ◽  
Bandwidth Efficiency ◽  
Fifth Generation ◽  
Access Scheme ◽  
Simulation Results ◽  
The Relationship ◽  
Better Than

Non-orthogonal multiple access (NOMA) is an important technique that enables fifth-generation (5G) wireless systems to satisfy the heterogeneous requirements of enhanced fairness, huge connectivity, high performance, low latency, and high reliability. In this work, the NOMA technique for 5G wireless communication is investigated, and considering user fairness limitations, the channel capacity has been optimized. Also, bandwidth efficiency (BE) is examined and the relationship between BE and energy efficiency (EE) is derived. Simulation results show that without wasting power the near user gets preference in power allocation when the target rate is greater than 6.4 bps/Hz. Also, when the target rate [Formula: see text] 6.4 bps/Hz, the outage performance of the near user will improve and the performance of the far user will remain the same. Also, it is demonstrated that cooperative NOMA outperforms all other techniques. Simulation outcomes confirm that NOMA performs better than conventional multiple access techniques in terms of EE and BE.

scholarly journals Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Rafal Przesmycki ◽  
Marek Bugaj ◽  
Leszek Nowosielski
Keyword(s):  
Microstrip Antenna ◽  
Communication Systems ◽  
High Speed ◽  
Wireless Systems ◽  
High Energy ◽  
Design Solution ◽  
Radio Communication ◽  
Compact Structure ◽  
Large Bandwidth ◽  
Fifth Generation

Communication systems have been driven towards the fifth generation (5G) due to the demands of compact, high speed, and large bandwidth systems. These types of radio communication systems require new and more efficient antenna designs. This article presents a new design solution of a broadband microstrip antenna intended for use in 5G systems. The proposed antenna has a central operating frequency of 28 GHz and can be used in the LMDS (local multipoint distribution service) frequency band. The dimensions of the antenna and its parameters have been calculated, simulated, and optimized using the FEKO software. The antenna has a compact structure with dimensions (6.2 × 8.4 × 1.57) mm. Rogers RT Duroid 5880 material was used as a substrate for the antenna construction, which has a dielectric coefficient of 2.2 and a thickness of 1.57 mm. The antenna described in the article is characterized by a low reflection coefficient of −22.51 dB, a high energy gain value of 3.6 dBi, a wide operating band of 5.57 GHz (19.89%), and high energy efficiency.

scholarly journals 5G NR system design: a concise survey of key features and capabilities

2021 ◽  
Author(s):  
Federica Rinaldi ◽  
Alessandro Raschellà ◽  
Sara Pizzi
Keyword(s):  
System Design ◽  
Wireless Systems ◽  
Future Research ◽  
Research Directions ◽  
New Era ◽  
Fifth Generation ◽  
New Radio ◽  
Machine Type Communications ◽  
Future Research Directions ◽  
The Impact

AbstractAs we enter a new era of next-generation wireless systems represented by Fifth Generation (5G) New Radio (NR) technology, it is essential to grasp the recent progress in their standardization and development. This article offers a concise survey of the 5G NR system design that aims at introducing its features according to the relevant Third Generation Partnership (3GPP) specifications. Our focus is set on the flexibility of 5G NR, which refers to its capability to support novel services and technologies, such as enhanced Mobile Broadband (eMBB) and Internet of Things (IoT) for massive Machine Type Communications (mMTC) while satisfying the underlying quality requirements. The key enablers of the 5G NR operation are scalable numerology, ultra-lean and beam-centric design, support for low latency, spectrum extension, and forward compatibility. This work summarizes these important features by studying the overall 5G architecture and the user-/control-plane protocol stacks specified by 3GPP. Furthermore, the impact of scalable numerology on system performance is discussed. Finally, we also consider open challenges and future research directions.

scholarly journals A concept of future sixth generation wireless networks: 6G

Tehnika ◽  
2021 ◽  
Vol 76 (3) ◽  
pp. 335-341
Author(s):  
Uglješa Urošević ◽  
Zoran Veljović
Keyword(s):  
Wireless Networks ◽  
Wireless Systems ◽  
Satellite Communications ◽  
Mobile Wireless ◽  
Fifth Generation ◽  
Sixth Generation ◽  
The Future ◽  
Generation Network ◽  
Communication Needs ◽  
The Given

Simultaneously with the beginning of the implementation of the fifth generation wireless networks (5G systems), the research of the next generation mobile wireless systems - the sixth generation network 6G, has began. Having in mind the already started considerations on the components of the future 6G technology, it is necessary to follow the given technological trends, which are waiting for us beyond 5G era. This paper will explain the range of communication needs and technologies within the future 6G. 6G is expected to include three main aspects, mobile ultra broadband, super Internet-of-Things (IoT) and Artificial Intelligence (AI). The paper will present an overview of the crucial technology that is planned to achieve the first two aspects. In particular, THz communication could be used to support mobile ultra-broadband, while symbiotic radio and satellite communications to support super IoT. For each technology, the basic basic principle of functioning, key challenges and currently current approaches and solutions will be given. It will be especially emphasized what 6G brings in relation to 5G, ie what are the key new characteristics.

scholarly journals Importance of Fifth Generation Wireless Systems

2020 ◽  
Author(s):  
K. Sakthidasan Sankaran ◽  
G. Ramprabu ◽  
V.R. Prakash
Keyword(s):  
Wireless Systems ◽  
Fifth Generation

scholarly journals Machine Learning: A Catalyst for THz Wireless Networks

2021 ◽  
Vol 2 ◽  
Author(s):  
Alexandros-Apostolos A. Boulogeorgos ◽  
Edwin Yaqub ◽  
Marco di Renzo ◽  
Angeliki Alexiou ◽  
Rachana Desai ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Multiple Access ◽  
Radio Resource Management ◽  
Wireless Systems ◽  
Transport Layer ◽  
Radio Resource ◽  
Technical Literature ◽  
Future Directions ◽  
Fifth Generation ◽  
Physical Medium

With the vision to transform the current wireless network into a cyber-physical intelligent platform capable of supporting bandwidth-hungry and latency-constrained applications, both academia and industry turned their attention to the development of artificial intelligence (AI) enabled terahertz (THz) wireless networks. In this article, we list the applications of THz wireless systems in the beyond fifth generation era and discuss their enabling technologies and fundamental challenges that can be formulated as AI problems. These problems are related to physical, medium/multiple access control, radio resource management, network and transport layer. For each of them, we report the AI approaches, which have been recognized as possible solutions in the technical literature, emphasizing their principles and limitations. Finally, we provide an insightful discussion concerning research gaps and possible future directions.

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