scholarly journals A Secure Link-Layer Connectivity Platform for Multi-Site NFV Services

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1868
Author(s):  
Ivan Vidal ◽  
Borja Nogales ◽  
Diego R. Lopez ◽  
Juan Rodríguez ◽  
Francisco Valera ◽  
...  
Keyword(s):  
Open Source Software ◽  
Mobile Networks ◽  
Link Layer ◽  
Key Technology ◽  
Data Rates ◽  
Television Service ◽  
Network Functions ◽  
New Challenges ◽  
Functional Prototype ◽  
High Degree

Network Functions Virtualization (NFV) is a key technology for network automation and has been instrumental to materialize the disruptive view of 5G and beyond mobile networks. In particular, 5G embraces NFV to support the automated and agile provision of telecommunication and vertical services as a composition of versatile virtualized components, referred to as Virtual Network Functions (VNFs). It provides a high degree of flexibility in placing these components on distributed NFV infrastructures (e.g., at the network edge, close to end users). Still, this flexibility creates new challenges in terms of VNF connectivity. To address these challenges, we introduce a novel secure link-layer connectivity platform, L2S. Our solution can automatically be deployed and configured as a regular multi-site NFV service, providing the abstraction of a layer-2 switch that offers link-layer connectivity to VNFs deployed on remote NFV sites. Inter-site communications are effectively protected using existing security solutions and protocols, such as IP security (IPsec). We have developed a functional prototype of L2S using open-source software technologies. Our evaluation results indicate that this prototype can perform IP tunneling and cryptographic operations at Gb/s data rates. Finally, we have validated L2S using a multi-site NFV ecosystem at the Telefonica Open Network Innovation Centre (5TONIC), using our solution to support a multicast-based IP television service.

Telematics and Mobile Internet

2021 ◽  
pp. 373-396
Author(s):  
Gurkan Tuna ◽  
Korhan Cengiz
Keyword(s):  
Mobile Networks ◽  
Urban Areas ◽  
Intelligent Transportation System ◽  
Intelligent Transportation ◽  
Transportation System ◽  
Mobile Internet ◽  
Future Research ◽  
Internet Applications ◽  
Data Rates ◽  
Latency Jitter

Telematics technologies and vehicular communications enable various intelligent transportation system applications with different data flow requirements that must be considered by the communications infrastructure provider in terms of transmission reliability, latency, jitter, and security. To meet those requirements, the dynamic nature of traffic and spatiotemporal features of roads must be considered. In parallel with the full coverage in urban areas and increase in the data rates, mobile networks have been started to be widely used by intelligent transportation system applications, especially for gathering data from various sensors. In this chapter, firstly, the current situation of telematics applications for intelligent transportation system is focused on and then mobile internet and mobile internet based applications are reviewed. Second, how much benefit vehicle telematics and mobile internet applications can obtain from the evolution of mobile networks is analysed. Finally, future research directions in this domain are pointed out.

TCP flow control using link layer information in mobile networks

2002 ◽  
Author(s):  
Hiroyuki Koga ◽  
Kenji Kawahara ◽  
Yuji Oie
Keyword(s):  
Flow Control ◽  
Mobile Networks ◽  
Link Layer

Special Issue on Robot Vision

2003 ◽  
Vol 15 (3) ◽  
pp. 253-253
Author(s):  
Kazunori Umeda ◽  
Keyword(s):  
Robot Vision ◽  
Active Vision ◽  
The Other ◽  
Special Issue ◽  
Range Imaging ◽  
Research Activity ◽  
Exciting Field ◽  
Key Technology ◽  
Quadruped Robots ◽  
High Degree

Robot vision is an essential key technology in robotics and mechatronics. The number of studies on robot vision is wide-ranging, and this topic remains a hot vital target. This special issue reviews recent advances in this exciting field, following up two special issues, Vol. 11 No. 2, and Vol. 13 No. 6, which attracted more papers than expected. This indicates the high degree of research activity in this field. I am most pleased to report that this issue presents 12 excellent papers covering robot vision, including basic algorithms based on precise optical models, pattern and gesture recognition, and active vision. Several papers treat range imaging and others interesting applications to agriculture and quadruped robots and new devices. This issue also presents two news briefs, one on a practical range sensor suited to mobile robots and the other on vision devices that are the improved ones of famous IP-5000 series. I am convinced that this special issue helps research on robot vision more exciting. I would like to close by thanking all of the researchers who submitted their studies, and to give special thanks to the reviewers and editors, especially Prof. M. Kaneko, Dr. K. Yokoi, and Prof. Y. Nakauchi.

scholarly journals Review of the International Scientific and Practical Conference “Third Baskin Readings. Law and State of the Information Era: New Challenges and Prospects” (St. Petersburg, April 28, 2021)

2021 ◽  
Author(s):  
Nikolay V. Razuvaev ◽  
◽  
Irina K. Shmarko ◽  
Keyword(s):  
New Technologies ◽  
Legal Regulation ◽  
State Characteristic ◽  
The Third ◽  
The World ◽  
Protection Of Human Rights ◽  
New Challenges ◽  
High Degree ◽  
Practical Conference

In the review of the conference “The Third Baskin Readings. Law and State of the Information Era: New Challenges and Prospects” presents a summary of the main theses of the speakers on the problems of digitalization, the concept and protection of human rights and freedoms in a digital society, the role of artificial intelligence, transformation of law as such and other issues. The speakers generally concluded that there was no special change in the legal system for the needs of digitalization, concluded that law as a social phenomenon has a high degree of adaptability to changing conditions, and the use of new technologies should not affect the content of legal regulation as a whole. However, during the discussion, it is proposed to consider new signs of law, for example, “seriousness of law” in relation to the theory of the game. The participants come to the conclusion that the world is multipolar and at the same time there can be various structures of law and state, characteristic of different stages of socio-economic development of societies.

scholarly journals Atvirųjų programų naudojimas mokymui

2008 ◽  
Vol 42 (43) ◽  
pp. 78-83
Author(s):  
Daiva Šiškevičiūtė ◽  
Eugenijus Valavičius
Keyword(s):  
Information Technology ◽  
Open Source ◽  
Open Source Software ◽  
Social Life ◽  
Information Technologies ◽  
Two Stage ◽  
Proprietary Software ◽  
Business College ◽  
New Challenges ◽  
Open Standards

Atvirųjų standartų plitimas kelia naujus reikalavimus informacinių technologijų ir kitų kompiuterinių dalykų dėstytojams. Straipsnyje analizuojamos problemos, iškylančios ruošiantis dėstyti informacinių technologijų kursą, kai kompiuterių taikymo veiksmai iliustruojami atvirosiomis programomis. Taip pat pateikiama studentų pasirengimo priimti tokį kursą analizė – dviejų etapų nuomonės pokyčių tyrimo rezultatai, jų palyginimas su kitais tyrimais, vienų mokslo metų dėstymo patirtis.Teaching of information technology and open source programsDaiva Šiškevičiūtė, Eugenijus Valavičius SummaryThe movement towards open standards on all levels of social life/the life of society puts up new challenges for teachers of Information Technologies and other computer-related disciplines. Vilnius Business College prepared a plan of particular switchover from proprietary software in computer laboratories to open source software. This paper analyses the results of a two-stage survey of students’ opinion about open source software and problems that can occur when using such programs.The changes in students opinion are discussed and results of our surveys are compared with the results of an analogous survey in Lithuanian schools.

scholarly journals The Tourist Destination Management and Its Dynamism: The Case of Barcelona Versus Catalonia

2021 ◽  
Vol 32 (1) ◽  
pp. 171-188
Author(s):  
Anna Alvado ◽  
Joan Sorribes ◽  
Josep Boyra
Keyword(s):  
Economic Activities ◽  
Tourist Destination ◽  
Tourism Sector ◽  
Tourist Flows ◽  
Degree Of Satisfaction ◽  
Global Tourism ◽  
New Challenges ◽  
High Degree ◽  
Difficult Times ◽  
The City

The present article tries to evaluate, from the analysis of different manage­rial components and factors, the degree of competitiveness and dynamism of a tourist destination. To carry out this analysis, the city of Barcelona and its role as the capital of Catalonia have been chosen. At a time of deep world­wide economic crisis due to Covid-19 pandemic tourism has declining by 70% worldwide during 2020. Nevertheless, tourism has demonstrated its great resilience and strength as a global engine for economic activities development generating jobs and wealth over the last decades. It is in this context, where the article analyzes the behavior of Barcelona, as a reference for the destina­tion Catalonia, in front the pandemic crisis and the strength of new emerging tourism competitors. Indeed, the reorganization of the pattern of distribution of tourist flows in the global tourism market due to health restrictions and the pace of economic emitting powers recovery generates a significant number of new opportunities. Tourist flows are posing new challenges in terms of their reception, the management of their stay and the fulfillment of a high degree of satisfaction in relation to their tourist experience. This article analyses a series of strategies promoted by different agents and managers in the field of tourism to subsequently present a set of recommendations to help assist decision-mak­ing in a tourism sector that is going through difficult times.

scholarly journals Provide security for wireless mobile networks with different multiple access Techniques and MANET Network

2018 ◽  
Vol 7 (2.20) ◽  
pp. 57
Author(s):  
E Uma Shankari ◽  
S Rajashekhar Reddy ◽  
P Aditya Sharma ◽  
G Geetha
Keyword(s):  
Mobile Networks ◽  
Mobile Communications ◽  
Multiple Access ◽  
High Speed ◽  
Instant Messaging ◽  
Mobile Client ◽  
Network Problems ◽  
Data Rates ◽  
Additional Costs ◽  
Information Cell

The most recent versatile innovation of new features in mobile technology is needed for advancement of the Internet, for the features of better, quicker access of information. Cell division subscribers pay additional costs for instant messaging, stock quotes, and Furthermore easy internet access on their phones. In order to support such a capable system, we need pervasive, high-speed remote connectivity. Bluetooth and 802.11 are currently existing techniques for providing high speed digital wireless connectivity. The extension of 4G technology gave scope for mobile communications. Mobile is not only a portable talking gadget but also utilized for multiple distinctive purposes.4G offers higher data rates for consistent roaming. That portable mobile client might communicate without any disturbance due to network problems. In this process report we discuss different tests that 4G will facing and also gives the solutions for those problems. We recommend our own method for enhancing QoS On 4G eventually by utilizing both SMIP and SIP. We recommend that by utilizing such plan we might accomplish better QoS throughout that process of handover. 

scholarly journals A Review on MIMO Wireless Signals over Fibre for Next Generation Fibre Wireless (FiWi) Broadband Networks

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2014
Author(s):  
M. A. Elmagzoub ◽  
Asadullah Shaikh ◽  
Abdullah Alghamdi ◽  
Khairan Rajab
Keyword(s):  
Wireless Networks ◽  
Optical Networks ◽  
Optical Fibre ◽  
Mobile Networks ◽  
Access Network ◽  
Future Research ◽  
Broadband Networks ◽  
Next Generation ◽  
High Data ◽  
Data Rates

Next-generation access/mobile networks have set high standards in terms of providing wireless services at high data rates in order to keep up with the vast demands for other mobility and multiple services. Wireless-optical broadband access network (WOBAN) technology, also known as fibre-wireless (FiWi), has uncovered incredible opportunities for the future of next-generation networks because it gets the best of both domains: huge bandwidth provided by the optical fibre and high ubiquity of the wireless domain. The objective of FiWi networks is to integrate the high data rate and long reach provided by optical networks and the ubiquity and mobility of wireless networks, with the target to decrease their expense and complexity. Multiple-input–multiple-output (MIMO) is an inevitable technique for most of the new mobile/wireless networks that are driven by the huge data rates required by today’s users. Consequently, to construct any FiWi system for next-generation (NG) access/broadband networks, an MIMO technique has to be considered. This article presents a comprehensive, contemporary review of the latest subsystems, architectures and integrated technologies of MIMO wireless signals backhauling using optical fibre or fibre access networks, such as passive optical networks (PONs). An overview for FiWi, PONs and MIMO wireless systems is provided. In addition, advanced techniques of accommodating the MIMO wireless signals over optical fibre are explained and compared. Different types of wireless MIMO signals over fibre, such as 5G, WiFi and related transport technologies, are reviewed. Moreover, future research trends are also discussed.

Sign in / Sign up

Export Citation Format

Share Document