B-ISDN networking using group virtual paths

2002 ◽  
Author(s):  
T. Takahashi ◽  
S. Nakajima ◽  
S.-I. Chaki ◽  
M. Omotani
Keyword(s):  
Virtual Paths

scholarly journals A Navigation and Augmented Reality System for Visually Impaired People

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3061
Author(s):  
Alice Lo Valvo ◽  
Daniele Croce ◽  
Domenico Garlisi ◽  
Fabrizio Giuliano ◽  
Laura Giarré ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Visually Impaired ◽  
Virtual Path ◽  
Physical Support ◽  
Augmented Reality System ◽  
Virtual Paths ◽  
Visually Impaired People ◽  
Impaired People ◽  
Autonomous Mobility ◽  
Indoor And Outdoor

In recent years, we have assisted with an impressive advance in augmented reality systems and computer vision algorithms, based on image processing and artificial intelligence. Thanks to these technologies, mainstream smartphones are able to estimate their own motion in 3D space with high accuracy. In this paper, we exploit such technologies to support the autonomous mobility of people with visual disabilities, identifying pre-defined virtual paths and providing context information, reducing the distance between the digital and real worlds. In particular, we present ARIANNA+, an extension of ARIANNA, a system explicitly designed for visually impaired people for indoor and outdoor localization and navigation. While ARIANNA is based on the assumption that landmarks, such as QR codes, and physical paths (composed of colored tapes, painted lines, or tactile pavings) are deployed in the environment and recognized by the camera of a common smartphone, ARIANNA+ eliminates the need for any physical support thanks to the ARKit library, which we exploit to build a completely virtual path. Moreover, ARIANNA+ adds the possibility for the users to have enhanced interactions with the surrounding environment, through convolutional neural networks (CNNs) trained to recognize objects or buildings and enabling the possibility of accessing contents associated with them. By using a common smartphone as a mediation instrument with the environment, ARIANNA+ leverages augmented reality and machine learning for enhancing physical accessibility. The proposed system allows visually impaired people to easily navigate in indoor and outdoor scenarios simply by loading a previously recorded virtual path and providing automatic guidance along the route, through haptic, speech, and sound feedback.

scholarly journals Catalogación, Digitalización y Valorización de las fortalezas defensivas de la frontera Galicia - norte de Portugal

2010 ◽  
Vol 1 (2) ◽  
pp. 149
Author(s):  
José L. De Nicolás Sánchez ◽  
Mariana Correia ◽  
Juan A. Villasante
Keyword(s):  
Sustainable Management ◽  
Geographical Area ◽  
Military History ◽  
The Other ◽  
Local Identities ◽  
Virtual Paths ◽  
Other Hand ◽  
Management Plans ◽  
The One

<p>The project, cofinanced by the line of the UE “INTERREG IIIA”, was focused, on the one hand, in Identification, Study, Cataloguing and Valuation of missing and preserved components of defensive fortifications, located in the geographical area under study. On the other hand were put up in virtual paths different fortifications that made up the defensive system. Besides, the foundations were laid for the development of sustainable Management Plans for the property, with the consequent strengthening of local identities and the improvement of the local tourist promotion. In popularization phase, a Database website was developed and it will be enriched by military history experts, and the results were announced in conferences and exhibitions.</p>

Application-aware virtual paths insertion for NOCs

2014 ◽  
Vol 45 (4) ◽  
pp. 454-462 ◽  
Author(s):  
Majed ValadBeigi ◽  
Farshad Safaei ◽  
Bahareh Pourshirazi
Keyword(s):  
Virtual Paths ◽  
Application Aware

Shared Transport for Different Radio Broadband Mobile Technologies

2011 ◽  
pp. 135-159 ◽  
Author(s):  
Xi Li ◽  
Thushara Weerawardane ◽  
Yasir Zaki ◽  
Carmelita Görg ◽  
Andreas Timm-Giel
Keyword(s):  
Asynchronous Transfer Mode ◽  
Access Network ◽  
Simulation Models ◽  
Transport Network ◽  
Mobile Technologies ◽  
Separation Technique ◽  
Digital Subscriber Line ◽  
Virtual Paths ◽  
Line Technology ◽  
Ip Transport

This chapter introduces traffic separation technique and presents several traffic separation approaches to transmit HSPA (HSDPA/HSUPA) traffic and UMTS Release 99 (R99) traffic over a shared access transport network. The traffic separation technique enables QoS differentiations of HSPA and R99 traffic, while aiming to achieve a maximum utilization of the transport resources. In this chapter, two transport networks are studied for UMTS access network: ATM (Asynchronous Transfer Mode) based transport network and IP based transport network with DSL (Digital Subscriber Line) technology. In the ATM based transport network, the authors suggest the traffic separation approaches by using separate ATM Virtual Paths (VPs) or Virtual Circuits (VCs) for transmitting R99 and HSPA traffic with different ATM QoS class. With the introduction of IP transport, the authors propose to transport the HSPA traffic over the DSL network while transmitting the R99 traffic with the legacy ATM network. The benefit of applying traffic separation and its impact on the performance of the transport network as well as the end users are studied in this article. The quantitative evaluations are provided by simulations. The results presented are obtained from own developed UMTS R99 and HSPA simulation models, which can generate HSDPA and HSUPA traffic as well as R99 traffic in the same UMTS network and transmit them with different transport technologies and traffic separation approaches. The presented results demonstrate that applying traffic separation between HSPA and R99 traffic can considerably improve the performance of both HSPA and R99 traffic, and as well bring significant gain on efficient bandwidth utilizations.

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