scholarly journals Unified access in licensed and unlicensed bands in LTE-A Pro and 5G

2017 ◽  
Vol 6 ◽  
Author(s):  
Boon Loong Ng ◽  
Hongbo Si ◽  
Aris Papasakellariou ◽  
Jianzhong Charlie Zhang
Keyword(s):  
Signal Propagation ◽  
Access Technology ◽  
Radio Access Technology ◽  
Radio Access ◽  
New Radio ◽  
Wide Range ◽  
Unlicensed Bands ◽  
Technical Features ◽  
Lte Unlicensed

Spectrum scarcity has driven enhancements of Long-Term Evolution (LTE) in utilizing unlicensed bands in conjunction with licensed bands for delivering mobile data, resulting in the introduction of LTE unlicensed technologies such as Rel-13 LTE–Licensed-Assisted Access (LAA), Rel-14 LTE–Enhanced Licensed-Assisted Access (eLAA), and LTE-Unlicensed (LTE-U). The next-generation radio access technology, 5G New Radio(NR), faces greater technical challenge due to the need to support frequency bands covering various spectrum licensing regimes and a wide range of frequencies (up to 100 GHz) with very different signal propagation characteristics. This paper presents an overview of LAA and eLAA technical features and 5G NR design considerations to achieve a unified access in licensed and unlicensed bands.

LTE Cellular Network Planning for Urban Area

2013 ◽  
Vol 4 (4) ◽  
pp. 16-37
Author(s):  
Md. Maruf Ahamed ◽  
Zahirul Islam ◽  
Sehtab Hossainand ◽  
Saleh Faruque
Keyword(s):  
Urban Area ◽  
Access Technology ◽  
Noise Interference ◽  
Radio Access Technology ◽  
Radio Access ◽  
Total Noise ◽  
Data Rates ◽  
Downlink Signal ◽  
New Applications

Due to the advancement of telecommunication platform, users are now demanding new applications such as Online Gaming, mobile TV, Web 2.0, and to meet this requirement operators needed to design more flexible network. To fulfill the requirements, 3rd Generation Partnership Project (3GPP) works on the Long Term Evolution (LTE) and propose a system which has larger bandwidths (up to 20 MHz), low latency and packet optimized radio access technology having peak data rates of 100 Mbps in downlink and 50 Mbps in the uplink (Magdalena, 2007; Motorola, 2007; Skold, 2009). Offering a greater coverage by providing higher data rates over wider areas and flexibility of use at existing and new frequency bands plan is a major challenge. In this paper, we are analyzing practical coverage scenario in an urban area (i.e. Kolkata) in terms of received signal levels, total noise, interference, throughput, and quality factor for downlink signal level.

scholarly journals On the design details of SS/PBCH, Signal Generation and PRACH in 5G-NR

2020 ◽  
Author(s):  
Arvind Chakrapani
Keyword(s):  
Access Network ◽  
Advanced Technology ◽  
Signal Generation ◽  
Receiver Design ◽  
Access Technology ◽  
Radio Access Technology ◽  
Group 4 ◽  
Radio Access ◽  
New Radio ◽  
And Performance

<p><b>The 3<sup>rd</sup> Generation Partnership Project (3GPP) specification of the fifth generation (5G) New Radio (NR) allows for a highly scalable and flexible radio access technology to cater to network operators with different requirements. Such scalability and flexibilities in network configurations inevitably translate to complications in the design and implementation of 5G-NR systems. Radio access in 5G-NR is much more complex and involved than its predecessor, 4G long term evolution (LTE) and LTE-Advanced technology. Therefore, the 5G-NR specifications turn out to be quite dense. Specifically, the specifications are concise, design motivations rarely explained, and the information can be convoluted or distributed across several documents. Moreover, there are several key design details associated with the access layer procedures for any given physical layer channel, which are often omitted in the specifications. For example, design motivation aspects of initial access channels or signal generation can be quite difficult to follow or understand in 5G-NR. In this paper, all the design details associated with initial access channels and signal generation in 5G-NR specifications are laid out. The contributions of the paper are three folds. First, <a>the design details and justifications associated with both downlink and uplink access channels are presented along with signal generation details. Secondly, receiver design aspects of NR PRACH short formats are discussed. Lastly, PRACH receiver implementation aspects and performance reports from different network operators are presented and compared with 3GPP specified Radio Performance and Protocol aspect requirements</a><a><b>[1]</b></a> for millimeter wave (mmW) access. The work in this paper is of significant value to researchers and system engineers looking to design and build initial access algorithms as part of 5G NR systems. </b></p> <div><br> <hr> <div> <p><a>[1]</a> Radio Performance and Protocol aspect requirements are specified by the 3GPP Radio Access Network working group 4, also known as RAN4.</p> </div> </div>

CBTC DCS Based on LTE Unlicensed Wireless Access: Assessment of Coexistence Performance With Wi-Fi

2018 ◽  
Author(s):  
Arash Aziminejad ◽  
Yan He
Keyword(s):  
Data Communication ◽  
Communication Technologies ◽  
System Level ◽  
Access Technology ◽  
Train Control ◽  
Radio Access Technology ◽  
Radio Access ◽  
Chain Analysis ◽  
Railway Industry

As the existing communication technologies which for about a decade have supported railway operations and the huge transition from conventional to modern communication-based signaling approach the extent of their performance capabilities, the railway industry strives to migrate to a proven solution aiming to support the new and diverse broadband services and reduce cost. Long Term Evolution (LTE) radio access technology has been globally accepted because of the unparalleled performance, off-the-shelf convenience, and well-developed standardization. An LTE solution, however, brings both the opportunities and challenges to a Data Communication System (DCS) underlying a Communication-Based Train Control (CBTC) system. The presented research targets one of the main LTE deployment challenges; the spectrum availability. To cope with the increasing scarcity of spectrum resources, LTE/LTE-A has envisaged an extension to the unlicensed band which is already heavily populated with incompatible legacy systems such as the immensely popular Wi-Fi networks. In this paper, a design framework is established to dimension the LTE system according to the CBTC DCS sub-system level requirements. Furthermore, the LTE/Wi-Fi coexistence performance is evaluated and studied in a train control application’s context by using a Markov chain analysis approach.

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.

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 On the design details of SS/PBCH, Signal Generation and PRACH in 5G-NR

2020 ◽  
Author(s):  
Arvind Chakrapani
Keyword(s):  
Access Network ◽  
Advanced Technology ◽  
Signal Generation ◽  
Receiver Design ◽  
Access Technology ◽  
Radio Access Technology ◽  
Group 4 ◽  
Radio Access ◽  
New Radio ◽  
And Performance

<p><b>The 3<sup>rd</sup> Generation Partnership Project (3GPP) specification of the fifth generation (5G) New Radio (NR) allows for a highly scalable and flexible radio access technology to cater to network operators with different requirements. Such scalability and flexibilities in network configurations inevitably translate to complications in the design and implementation of 5G-NR systems. Radio access in 5G-NR is much more complex and involved than its predecessor, 4G long term evolution (LTE) and LTE-Advanced technology. Therefore, the 5G-NR specifications turn out to be quite dense. Specifically, the specifications are concise, design motivations rarely explained, and the information can be convoluted or distributed across several documents. Moreover, there are several key design details associated with the access layer procedures for any given physical layer channel, which are often omitted in the specifications. For example, design motivation aspects of initial access channels or signal generation can be quite difficult to follow or understand in 5G-NR. In this paper, all the design details associated with initial access channels and signal generation in 5G-NR specifications are laid out. The contributions of the paper are three folds. First, <a>the design details and justifications associated with both downlink and uplink access channels are presented along with signal generation details. Secondly, receiver design aspects of NR PRACH short formats are discussed. Lastly, PRACH receiver implementation aspects and performance reports from different network operators are presented and compared with 3GPP specified Radio Performance and Protocol aspect requirements</a><a><b>[1]</b></a> for millimeter wave (mmW) access. The work in this paper is of significant value to researchers and system engineers looking to design and build initial access algorithms as part of 5G NR systems. </b></p> <div><br> <hr> <div> <p><a>[1]</a> Radio Performance and Protocol aspect requirements are specified by the 3GPP Radio Access Network working group 4, also known as RAN4.</p> </div> </div>

scholarly journals On the design details of SS/PBCH, Signal Generation and PRACH in 5G-NR

2020 ◽  
Author(s):  
Arvind Chakrapani
Keyword(s):  
Access Network ◽  
Advanced Technology ◽  
Signal Generation ◽  
Receiver Design ◽  
Access Technology ◽  
Radio Access Technology ◽  
Group 4 ◽  
Radio Access ◽  
New Radio ◽  
And Performance

<p><b>The 3<sup>rd</sup> Generation Partnership Project (3GPP) specification of the fifth generation (5G) New Radio (NR) allows for a highly scalable and flexible radio access technology to cater to network operators with different requirements. Such scalability and flexibilities in network configurations inevitably translate to complications in the design and implementation of 5G-NR systems. Radio access in 5G-NR is much more complex and involved than its predecessor, 4G long term evolution (LTE) and LTE-Advanced technology. Therefore, the 5G-NR specifications turn out to be quite dense. Specifically, the specifications are concise, design motivations rarely explained, and the information can be convoluted or distributed across several documents. Moreover, there are several key design details associated with the access layer procedures for any given physical layer channel, which are often omitted in the specifications. For example, design motivation aspects of initial access channels or signal generation can be quite difficult to follow or understand in 5G-NR. In this paper, all the design details associated with initial access channels and signal generation in 5G-NR specifications are laid out. The contributions of the paper are three folds. First, <a>the design details and justifications associated with both downlink and uplink access channels are presented along with signal generation details. Secondly, receiver design aspects of NR PRACH short formats are discussed. Lastly, PRACH receiver implementation aspects and performance reports from different network operators are presented and compared with 3GPP specified Radio Performance and Protocol aspect requirements</a><a><b>[1]</b></a> for millimeter wave (mmW) access. The work in this paper is of significant value to researchers and system engineers looking to design and build initial access algorithms as part of 5G NR systems. </b></p> <div><br> <hr> <div> <p><a>[1]</a> Radio Performance and Protocol aspect requirements are specified by the 3GPP Radio Access Network working group 4, also known as RAN4.</p> </div> </div>

scholarly journals On the design details of SS/PBCH, Signal Generation and PRACH in 5G-NR

2020 ◽  
Author(s):  
Arvind Chakrapani
Keyword(s):  
Access Network ◽  
Advanced Technology ◽  
Signal Generation ◽  
Receiver Design ◽  
Access Technology ◽  
Radio Access Technology ◽  
Group 4 ◽  
Radio Access ◽  
New Radio ◽  
And Performance

<p><b>The 3<sup>rd</sup> Generation Partnership Project (3GPP) specification of the fifth generation (5G) New Radio (NR) allows for a highly scalable and flexible radio access technology to cater to network operators with different requirements. Such scalability and flexibilities in network configurations inevitably translate to complications in the design and implementation of 5G-NR systems. Radio access in 5G-NR is much more complex and involved than its predecessor, 4G long term evolution (LTE) and LTE-Advanced technology. Therefore, the 5G-NR specifications turn out to be quite dense. Specifically, the specifications are concise, design motivations rarely explained, and the information can be convoluted or distributed across several documents. Moreover, there are several key design details associated with the access layer procedures for any given physical layer channel, which are often omitted in the specifications. For example, design motivation aspects of initial access channels or signal generation can be quite difficult to follow or understand in 5G-NR. In this paper, all the design details associated with initial access channels and signal generation in 5G-NR specifications are laid out. The contributions of the paper are three folds. First, <a>the design details and justifications associated with both downlink and uplink access channels are presented along with signal generation details. Secondly, receiver design aspects of NR PRACH short formats are discussed. Lastly, PRACH receiver implementation aspects and performance reports from different network operators are presented and compared with 3GPP specified Radio Performance and Protocol aspect requirements</a><a><b>[1]</b></a> for millimeter wave (mmW) access. The work in this paper is of significant value to researchers and system engineers looking to design and build initial access algorithms as part of 5G NR systems. </b></p> <div><br> <hr> <div> <p><a>[1]</a> Radio Performance and Protocol aspect requirements are specified by the 3GPP Radio Access Network working group 4, also known as RAN4.</p> </div> </div>

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