scholarly journals Optical Metro Network Design with Low Cost of Equipment

2021 ◽  
Author(s):  
Oleg Karandin ◽  
Omran Ayoub ◽  
Memedhe Ibrahimi ◽  
Francesco Musumeci ◽  
Andrea Castoldi ◽  
...  
Keyword(s):  
Network Design ◽  
Low Cost ◽  
Metro Network

Corridor-based metro network design with travel flow capture

2018 ◽  
Vol 89 ◽  
pp. 58-67 ◽  
Author(s):  
Gabriel Gutiérrez-Jarpa ◽  
Gilbert Laporte ◽  
Vladimir Marianov
Keyword(s):  
Network Design ◽  
Flow Capture ◽  
Metro Network

Megaserver architechture: a simple, low-cost FDDI network design

1993 ◽  
Author(s):  
Dutt V. Bulusu ◽  
Michael H. Coden ◽  
Brian D. Ramsey
Keyword(s):  
Network Design ◽  
Low Cost

scholarly journals VLC Network Design for High Mobility Users in Urban Tunnels

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 88
Author(s):  
Edmundo Torres-Zapata ◽  
Victor Guerra ◽  
Jose Rabadan ◽  
Martin Luna-Rivera ◽  
Rafael Perez-Jimenez
Keyword(s):  
Network Design ◽  
Intelligent Transportation Systems ◽  
High Speed ◽  
Vehicular Networks ◽  
Low Cost ◽  
High Mobility ◽  
Visible Light Communication ◽  
Transportation Systems ◽  
System Level ◽  
On The Road

Current vehicular systems require real-time information to keep drivers safer and more secure on the road. In addition to the radio frequency (RF) based communication technologies, Visible Light Communication (VLC) has emerged as a complementary way to enable wireless access in intelligent transportation systems (ITS) with a simple design and low-cost deployment. However, integrating VLC in vehicular networks poses some fundamental challenges. In particular, the limited coverage range of the VLC access points and the high speed of vehicles create time-limited links that the existing handover procedures of VLC networks can not be accomplished timely. Therefore, this paper addresses the problem of designing a vehicular VLC network that supports high mobility users. We first modify the traditional VLC network topology to increase uplink reliability. Then, a low-latency handover scheme is proposed to enable mobility in a VLC network. Furthermore, we validate the functionality of the proposed VLC network design method by using system-level simulations of a vehicular tunnel scenario. The analysis and the results show that the proposed method provides a steady connection, where the vehicular node is available more than 99% of the time regardless of the number of vehicular nodes on this network. Additionally, the system is able to achieve a Frame-Error-Rate (FER) performance lower than 10−3.

scholarly journals A Network-Design Analysis of Airline Business Model Adaptation in the Face of Competition and Consolidation

2021 ◽  
Author(s):  
Renan P. de Oliveira ◽  
Alessandro V. M. Oliveira ◽  
Gui Lohmann
Keyword(s):  
Mergers And Acquisitions ◽  
Network Design ◽  
Airline Industry ◽  
Business Models ◽  
Low Cost ◽  
Model Adaptation ◽  
Stepping Stones ◽  
Network Building ◽  
The Face ◽  
Hybrid Configuration

By focusing on the intrinsic relationship between business models and network configurations in the airline industry, this paper develops a two-stage methodology to estimate the strategic drivers of network design of the major carriers in Brazil. The empirical approach decomposes their domestic network-building rationales into the ones adopted by virtual archetypical carriers. We consider the previously conceived low-cost, full-service, and regional carrier archetypes. Our main contribution is the development of a model that allows airlines’ networks to be strategically designed in a time-evolving pattern, reflecting a dynamically chosen blend of these archetypes. Moreover, we also consider the effects that mergers and acquisitions may have had in inducing changes in these blends. Our results suggest that all analyzed airlines have repositioned themselves through their trajectories to adopt a hybrid configuration, aiming at the intersection of at least two archetypical network-design rationales. Besides, the effects of consolidations point to certain diversions of the acquiring airlines’ domestic network-building rationales toward the ones of the acquired carriers, providing evidence that the consolidations may have served as stepping stones for market-repositioning moves.

scholarly journals Enabling Technologies for Effective Deployment of Internet of Things (IoT) Systems

2020 ◽  
Vol 2 (4) ◽  
pp. 21
Author(s):  
Jamil Y. Khan ◽  
Dong Chen ◽  
Oliver Hulin
Keyword(s):  
Internet Of Things ◽  
Network Design ◽  
Network Architecture ◽  
Large Scale ◽  
Ieee 802.15.4 ◽  
Low Cost ◽  
Large Area ◽  
Coverage Area ◽  
Enabling Technologies ◽  
Networking Technologies

The demand for IoT (Internet of Things) systems that encompass cloud computing, the multitude of low power sensing and data collection electronic devices and distributed communications architecture is increasing at an exponential pace. With increasing interests from different industrial, business and social groups, in the near future it will be necessary to support massive deployment of diverse IoT systems in different geographical areas. Large scale deployment of IoT systems will introduce challenging problems for the communication designers, as the networking is one of the key enabling technologies for the IoT systems. Major challenges include cost effective network architecture, support of large area of coverage and diverse QoS (Quality of Service) requirements, reliability, spectrum requirements, energy requirements, and many other related issues. The paper initially reviews different classes of IoT applications and their communication requirements. Following the review, different communications and networking technologies that can potentially support large scale deployment of IoT systems for different industrial, business and social applications are discussed. The paper then concentrates on wireless networking technologies for IoT systems with specific focus on deployment issues. The deployment discussion concentrates on different IoT systems QoS and networking requirements, cost, coverage area and energy supply requirements. We introduce a sustainable low cost heterogeneous network design using short range radio standards such as IEEE 802.15.4/Zigbee, IEEE 802.11/WLAN that can be used to develop a wide area networks to support large number of IoT devices for various applications. Finally the paper makes some general recommendations towards sustainable network design techniques for future IoT systems that can reduce the OPEX and CAPEX requirements.

scholarly journals Access and Metro Network Convergence for Flexible End-to-End Network Design [Invited]

2017 ◽  
Vol 9 (6) ◽  
pp. 524 ◽  
Author(s):  
M. Ruffini ◽  
M. Achouche ◽  
A. Arbelaez ◽  
R. Bonk ◽  
A. Di Giglio ◽  
...  
Keyword(s):  
Network Design ◽  
Network Convergence ◽  
End To End ◽  
Metro Network

scholarly journals An Optimal Metro Design for Transit Networks in Existing Square Cities Based on Non-Demand Criterion

2020 ◽  
Vol 12 (22) ◽  
pp. 9566
Author(s):  
Mahmoud Owais ◽  
Abdou S. Ahmed ◽  
Ghada S. Moussa ◽  
Ahmed A. Khalil
Keyword(s):  
Network Design ◽  
Network Connectivity ◽  
Cost Benefit ◽  
Complex Problem ◽  
Transit System ◽  
Benefit Ratio ◽  
Transit Network ◽  
Transit Networks ◽  
Cost Benefit Ratio ◽  
Metro Network

The overall purpose of this study is to enhance existing transit systems by planning a new underground metro network. The design of a new metro network in the existing cities is a complex problem. Therefore, in this research, the study idea arises from the prerequisites to get out of conventional metro network design to develop a future scheme for forecasting an optimal metro network for these existing cities. Two models are proposed to design metro transit networks based on an optimal cost–benefit ratio. Model 1 presents a grid metro network, and Model 2 presents the ring-radial metro network. The proposed methodology introduces a non-demand criterion for transit system design. The new network design aims to increase the overall transit system connectivity by minimizing passenger transfers through the transit network between origin and destination. An existing square city is presented as a case study for both models. It includes twenty-five traffic analysis zones, and thirty-six new metro stations are selected at the existing street intersection. TransCAD software is used as a base for stations and the metro network lines to coordinate all these data. A passenger transfer counting algorithm is then proposed to determine the number of needed transfers between stations from each origin to each destination. Thus, a passenger Origin/Destination transfer matrix is created via the NetBeans program to help in determining the number of transfers required to complete the trips on both proposed networks. Results show that Model 2 achieves the maximum cost–benefit ratio (CBR) of the transit network that increases 41% more than CBR of Model 1. Therefore, it is found that the ring radial network is a more optimal network to existing square cities than the grid network according to overall network connectivity.

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