Experience Developing a Vehicular Network Based on Heterogeneous Communication Technologies

2012 ◽  
pp. 298-317
Author(s):  
Pedro J. Fernández ◽  
Cristian A. Nieto ◽  
José Santa ◽  
Antonio F. Gómez-Skarmeta ◽  
Johann Márquez-Barja ◽  
...  
Keyword(s):  
System Architecture ◽  
Network Architecture ◽  
Vehicular Networks ◽  
Communication Technologies ◽  
Vehicular Network ◽  
Security Environment ◽  
Key Issues ◽  
Access Control Mechanism ◽  
Set Up ◽  
Board System

This chapter describes the experiences and findings deploying a vehicular network architecture supporting different communication technologies. This approach has been developed taking into account key issues regarding mobility and security. These two aspects have been provided by means of the NEMO and IKEv2 protocols, respectively. In addition, thanks to the EAP protocol, transported by IKEv2, an extensible authentication method can be used to implement an access control mechanism. This work also focuses on how the terminal is aware of the surrounding environment in order to boost the handoff processes among heterogeneous networks using the IEEE 802.21 protocol. Apart from the description of the on-board system architecture, a WiMAX/WiFi deployment has been set up at the infrastructure side to validate the development of the mobility and security environment designed for vehicular networks.

scholarly journals The Role of Communication Technologies in Vehicular Applications

2010 ◽  
pp. 37-58
Author(s):  
Yacine Khaled ◽  
Manabu Tsukada ◽  
José Santa ◽  
Thierry Ernst
Keyword(s):  
Vehicular Networks ◽  
High Mobility ◽  
Communication Technologies ◽  
Vehicular Network ◽  
Design Stage ◽  
Key Factors ◽  
Network Layers ◽  
Application Requirements ◽  
Research World

Vehicular networks attract a lot of attention in the research world. Novel vehicular applications need a suitable communication channel in order to extend in-vehicle capabilities and, be aware of surrounding events. However, these networks present some peculiarities, such as high mobility or specific topologies. These features affect the performance of applications; hence, more effort should be directed to identify the final necessities of the network. Few works deal with application requirements that should be considered when vehicular services are designed. In this chapter this gap is filled, proposing an analysis of application requirements mapped with suitable communication technologies for physical/MAC and network layers. This study contains key factors that must be taken into account not only at the design stage of the vehicular network, but also when applications are evaluated.

An overview of the 5G mobile network architecture

2018 ◽  
Author(s):  
Phanidra Palagummi ◽  
Vedant Somani ◽  
Krishna M. Sivalingam ◽  
Balaji Venkat
Keyword(s):  
Wireless Network ◽  
Mobile Networks ◽  
Network Architecture ◽  
Mobile Network ◽  
Communication Technologies ◽  
Future Generation ◽  
Network Function Virtualization ◽  
Low Latency ◽  
High Bandwidth ◽  
Network Technologies

Networking connectivity is increasingly based on wireless network technologies, especially in developing nations where the wired network infrastructure is not accessible to a large segment of the population. Wireless data network technologies based on 2G and 3G are quite common globally; 4G-based deployments are on the rise during the past few years. At the same time, the increasing high-bandwidth and low-latency requirements of mobile applications has propelled the Third Generation Partnership Project (3GPP) standards organization to develop standards for the next generation of mobile networks, based on recent advances in wireless communication technologies. This standard is called the Fifth Generation (5G) wireless network standard. This paper presents a high-level overview of the important architectural components, of the advanced communication technologies, of the advanced networking technologies such as Network Function Virtualization and other important aspects that are part of the 5G network standards. The paper also describes some of the common future generation applications that require low-latency and high-bandwidth communications.

scholarly journals Application of intelligent orienteering based on Internet of things

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Donghui Zhang ◽  
Ruijie Liu
Keyword(s):  
Internet Of Things ◽  
Network Architecture ◽  
Emergency Services ◽  
Simulation Experiment ◽  
Experimental Studies ◽  
Signal Stability ◽  
Anchor Nodes ◽  
Set Up ◽  
The Relationship ◽  
The Internet Of Things

Abstract Orienteering has gradually changed from a professional sport to a civilian sport. Especially in recent years, orienteering has been widely popularized. Many colleges and universities in China have also set up this course. With the improvement of people’s living conditions, orienteering has really become a leisure sport in modern people’s life. The reduced difficulty of sports enables more people to participate, but it also exposes a series of problems. As the existing positioning technology is relatively backward, the progress in personnel tracking, emergency services, and other aspects is slow. To solve these problems, a new intelligent orienteering application system is developed based on the Internet of things. ZigBee network architecture is adopted in the system. ZigBee is the mainstream scheme in the current wireless sensor network technology, which has many advantages such as convenient carrying, low power consumption, and signal stability. Due to the complex communication environment in mobile signal, the collected information is processed by signal amplification and signal anti-interference technology. By adding anti-interference devices, video isolators and other devices, the signal is guaranteed to the maximum extent. In order to verify the actual effect of this system, through a number of experimental studies including the relationship between error and traffic radius and the relationship between coverage and the number of anchor nodes, the data shows that the scheme studied in this paper has a greater improvement in comprehensive performance than the traditional scheme, significantly improving the accuracy and coverage. Especially the coverage is close to 100% in the simulation experiment. This research has achieved good results and can be widely used in orienteering training and competition.

Washington will engage more with South-east Asia

2021 ◽  
Keyword(s):  
United States ◽  
East Asia ◽  
The United States ◽  
South East Asia ◽  
National Unity ◽  
Content Type ◽  
Key Issues ◽  
Set Up

Significance She addressed two key issues during her trip: tensions in post-coup Myanmar and China’s growing regional footprint. Shortly after she left the region, the United States announced that it would donate unused COVID-19 vaccines abroad, including to South-east Asia. Impacts Washington will tighten its sanctions on the Myanmar military while supporting ASEAN’s five-point plan to ease the country’s crisis. The National Unity Government, a parallel administration to Myanmar’s junta set up by its opponents, will try to attract greater US backing. Manila and Washington may extend negotiations over renewing their Visiting Forces Agreement to prevent the pact expiring in August.

scholarly journals Coworking, the Sharing Economy, and the City: Which Role for the ‘Coworking Entrepreneur’?

Urban Science ◽  
2018 ◽  
Vol 2 (3) ◽  
pp. 83 ◽  
Author(s):  
Giacomo Durante ◽  
Margherita Turvani
Keyword(s):  
Information And Communication Technologies ◽  
Organizational Factors ◽  
Communication Technologies ◽  
Sharing Economy ◽  
Internal Factors ◽  
Information And Communication ◽  
Entrepreneurial Action ◽  
Coworking Spaces ◽  
Set Up ◽  
The City

Sharing economy platforms enabled by information and communication technologies (ICTs) are facilitating the diffusion of collaborative workplaces. Coworking spaces are emerging as a distinctive phenomenon in this context, not only fostering knowledge transfer and facilitating innovation, but also affecting the urban and socio-economic fabric contributing to urban regeneration processes at both the local scale and the city scale. Although the positive impacts of coworking on the urban environment are documented, there is still little or no evidence of the economic viability of coworking businesses, and a “coworking bubble” has been evoked. Given the lack of data, a national survey was set up of Italian coworking businesses, aimed at assessing the relevance of internal organizational factors (size, occupancy, profitability, services provided) for the sustainability of coworking businesses. By presenting the results of the survey, we argue that the sustainability and viability of the coworking model is highly dependent on internal factors, strictly related to the entrepreneurial action of coworking managers.

scholarly journals Distributed Data Processing in Vehicular Networks using Mobile Agents

1970 ◽  
Vol 2 ◽  
pp. 61-62
Author(s):  
Óscar Urra ◽  
Sergio Ilarri
Keyword(s):  
Wireless Communications ◽  
Mobile Agent ◽  
Open Problem ◽  
Mobile Agents ◽  
Short Range ◽  
Vehicular Networks ◽  
Vehicular Network ◽  
Agent Technology ◽  
Distributed Data ◽  
Distributed Data Processing

In a vehicular network, vehicles can exchange interesting information (e.g., about accidents, traffic status, etc.) using short-range wireless communications. Besides, the vehicles can be equipped with additional sensors that can directly obtain data from the environment. How to efficiently process and collect these data is an open problem. We argue that mobile agent technology could be helpful.

scholarly journals DDGS: A Network Coding Scheme for Dynamic Adaptation to Heterogeneous Vehicular Networks

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Zongzheng Wang ◽  
Ping Dong ◽  
Tao Zheng ◽  
Hongke Zhang
Keyword(s):  
Network Coding ◽  
Vehicular Networks ◽  
Rapid Development ◽  
Heterogeneous Wireless Networks ◽  
Vehicular Network ◽  
Time Cost ◽  
Transportation Industry ◽  
Network Resources ◽  
Bandwidth Aggregation ◽  
Coding Scheme

The rapid development of the transportation industry has brought about the demand for massive data transmission. In order to make use of a large number of heterogeneous network resources in vehicular network, the research of applying network coding to multipath transmission has become a hot topic. Network coding can better solve the problems of packet reordering and low aggregation efficiency. The determination of coding scale is the key to network coding scheme. However, the existing research cannot adapt to the different characteristics of network resources in vehicular network, leading to larger decoding time cost and lower bandwidth aggregation efficiency. In this paper, we propose a network coding scheme called Delay Determined Group Size (DDGS), which could adaptively adjust the coding group according to the heterogeneous wireless networks state. The mathematical analysis and process design of the DDGS scheme are discussed in detail. Through a large number of simulations, we proved that the DDGS scheme is significantly superior to other coding group determination schemes in terms of decoding time cost and bandwidth aggregation efficiency.

scholarly journals Towards ecosystem accounting: a comprehensive approach to modelling multiple hydrological ecosystem services

2015 ◽  
Vol 12 (3) ◽  
pp. 3477-3526 ◽  
Author(s):  
C. Duku ◽  
H. Rathjens ◽  
S. J. Zwart ◽  
L. Hein
Keyword(s):  
Ecosystem Services ◽  
Assessment Tool ◽  
Statistical Tests ◽  
Relevant Information ◽  
Mathematical Representation ◽  
Service Capacity ◽  
Service Flow ◽  
Ecosystem Accounting ◽  
Key Issues ◽  
Set Up

Abstract. Ecosystem accounting is an emerging field that aims to provide a consistent approach to analysing environment-economy interactions. In spite of the progress made in mapping and quantifying hydrological ecosystem services, several key issues must be addressed if ecohydrological modelling approaches are to be aligned with ecosystem accounting. They include modelling hydrological ecosystem services with adequate spatiotemporal detail and accuracy at aggregated scales to support ecosystem accounting, distinguishing between service capacity and service flow, and linking ecohydrological processes to the supply of dependent hydrological ecosystem services. We present a spatially explicit approach, which is consistent with ecosystem accounting, for mapping and quantifying service capacity and service flow of multiple hydrological ecosystem services. A grid-based setup of a modified Soil Water and Assessment Tool (SWAT), SWAT Landscape, is first used to simulate the watershed ecohydrology. Model outputs are then post-processed to map and quantify hydrological ecosystem services and to set up biophysical ecosystem accounts. Trend analysis statistical tests are conducted on service capacity accounts to track changes in the potential to provide service flows. Ecohydrological modelling to support ecosystem accounting requires appropriate decisions regarding model process inclusion, physical and mathematical representation, spatial heterogeneity, temporal resolution, and model accuracy. We demonstrate this approach in the Upper Ouémé watershed in Benin. Our analyses show that integrating hydrological ecosystem services in an ecosystem accounting framework provides relevant information on ecosystems and hydrological ecosystem services at appropriate scales suitable for decision-making. Our analyses further identify priority areas important for maintaining hydrological ecosystem services as well as trends in hydrological ecosystem services supply over time.

Geographic information-based Data Transmission and Cooperative Communication for Vehicular Networks

2020 ◽  
Vol 1 (1) ◽  
pp. 27-34
Author(s):  
Abdul Rahim ◽  
Dr. V.A.Sankar Ponnapalli
Keyword(s):  
Energy Consumption ◽  
Cooperative Communication ◽  
Vehicular Networks ◽  
Data Communication ◽  
Vehicular Network ◽  
Vehicular Communication ◽  
Automobile Engineering ◽  
Communication Techniques ◽  
Close Relationship ◽  
Transmission Energy Consumption

With the advancements in Vehicular communication technologies in automobile engineering leads to enhancement of modern societies by utilizing Internet based data communication in a vehicular network to effectively avoid accidents and traffic congestions using Multi Input Multi Output (MIMO) cooperative relay technique for enhancing the aspects of performance by reduction of transmission energy consumption by taking the advantage of spatial and temporal diversity gain in a vehicular network as the conventional routing based on topology is merely not suitable over a dynamic vehicular network environment as GPS is used to identify effective route [4].In this paper we propose applications of cooperative communication techniques and their survey for identifying close relationship between forwarding and addressing techniques in a vehicular network and further we compare performance and energy consumption of cooperative techniques with the traditional multi-hop technique over Rayleigh channel using MQAM for optimization.

Large Scale Cognitive Wireless Networks

2013 ◽  
pp. 26-52
Author(s):  
Liang Song ◽  
Petros Spachos ◽  
Dimitrios Hatzinakos
Keyword(s):  
Energy Efficiency ◽  
Wireless Networks ◽  
Cognitive Radio ◽  
Data Aggregation ◽  
Network Architecture ◽  
Large Scale ◽  
Vehicular Networks ◽  
Network Resource ◽  
Cognitive Wireless Networks ◽  
Definition Of

Cognitive radio has been proposed to have spectrum agility (or opportunistic spectrum access). In this chapter, the authors introduce the extended network architecture of cognitive radio network, which accesses not only spectrum resource but also wireless stations (networking nodes) and high-level application data opportunistically: the large-scale cognitive wireless networks. The developed network architecture is based upon a re-definition of wireless linkage: as functional abstraction of proximity communications among wireless stations. The operation spectrum and participating stations of such abstract wireless links are opportunistically decided based on their instantaneous availability. It is able to maximize wireless network resource utilization and achieve much higher performance in large-scale wireless networks, where the networking environment can change fast (usually in millisecond level) in terms of spectrum and wireless station availability. The authors further introduce opportunistic routing and opportunistic data aggregation under the developed network architecture, which results in an implementation of cognitive unicast and cognitive data-aggregation wireless-link modules. In both works, it is shown that network performance and energy efficiency can improve with network scale (such as including station density). The applications of large-scale cognitive wireless networks are further discussed in new (and smart) beyond-3G wireless infrastructures, including for example real-time wireless sensor networks, indoor/underground wireless tracking networks, broadband wireless networks, smart grid and utility networks, smart vehicular networks, and emergency networks. In all such applications, the cognitive wireless networks can provide the most cost-effective wireless bandwidth and the best energy efficiency.

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