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.

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 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.

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.

scholarly journals Context-awareness for heterogeneous access management

2010 ◽  
Vol 8 ◽  
pp. 257-262 ◽  
Author(s):  
C. Mannweiler ◽  
A. Klein ◽  
J. Schneider ◽  
H. D. Schotten
Keyword(s):  
Communication Systems ◽  
Large Scale ◽  
Context Information ◽  
Access Management ◽  
Access Technology ◽  
Performance Improvements ◽  
Radio Access Technology ◽  
Radio Access ◽  
Use Context ◽  
Conventional Systems

Abstract. The increasing availability of both static and dynamic context information has steadily been driving the development of context-aware communication systems. Adapting system behavior according to current context of the network, the user, and the terminal can yield significant end-to-end performance improvements. In this paper, we present a concept for how to use context information, in particular location information and movement prediction, for Heterogeneous Access Management (HAM). In a first step, we outline the functional architecture of a distributed and extensible context management system (CMS) that defines the roles, tasks, and interfaces of all modules within such a system for large-scale context acquisition and dissemination. In a second step, we depict how the available context information can be exploited for optimizing terminal handover decisions to be made in a multi-RAT (radio access technology) environment. In addition, the utilized method for predicting terminal location as well as the objective functions used for evaluating and comparing system performance are described. Finally, we present preliminary simulation results demonstrating that HAM systems that include current and future terminal context information in the handover decision process clearly outperform conventional systems.

5G4SPACE: Adaptation of 5G radio access technology for Satcom

2019 ◽  
Author(s):  
Alessandro Di Mezza ◽  
Alessandro Vanelli Coralli ◽  
Alessandro Guidotti ◽  
Tommaso Foggi ◽  
Giulio Colavolpe ◽  
...  
Keyword(s):  
Access Technology ◽  
Radio Access Technology ◽  
Radio Access
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