76 research outputs found
Can Video Conferencing Be as Easy as Telephoning?-A Home Healthcare Case Study
Copyright © 2016 by authors and Scientific Research Publishing Inc.
This work is licensed under the Creative Commons Attribution International License (CC BY).In comparison with almost universal adoption of telephony and mobile technologies in modern day healthcare, video conferencing has yet to become a ubiquitous clinical tool. Currently telehealth services are faced with a bewildering range of video conferencing software and hardware choices. This paper provides a case study in the selection of video conferencing services by the Flinders University Telehealth in the Home trial (FTH Trial) to support healthcare in the home. Using pragmatic methods, video conferencing solutions available on the market were assessed for usability, reliability, cost, compatibility, interoperability, performance and privacy considerations. The process of elimination through which the eventual solution was chosen, the selection criteria used for each requirement and the corresponding results are described. The resulting product set, although functional, had restricted ability to directly connect with systems used by healthcare providers elsewhere in the system. This outcome illustrates the impact on one small telehealth provider of the broader struggles between competing video conferencing vendors. At stake is the ability to communicate between healthcare organizations and provide public access to healthcare. Comparison of the current state of the video conferencing market place with the evolution of the telephony system reveals that video conferencing still has a long way to go before it can be considered as easy to use as the telephone. Health organizations that are concerned to improve access and quality of care should seek to influence greater standardization and interoperability though cooperation with one another, the private sector, international organizations and by encouraging governments to play a more active role in this sphere
A WebRTC Video Chat Implementation Within the Yioop Search Engine
Web real-time communication (abbreviated as WebRTC) is one of the latest Web application technologies that allows voice, video, and data to work collectively in a browser without a need for third-party plugins or proprietary software installation. When two browsers from different locations communicate with each other, they must know how to locate each other,
bypass security and firewall protections, and transmit all multimedia communications in real time. This project not only illustrates how WebRTC technology works but also walks through a real example of video chat-style application. The application communicates between two remote users using WebSocket and the data encryption algorithm specified in WebRTC technology. This project concludes with a description of the WebRTC video chat application’s implementation in Yioop.com, a PHP-based internet search engine
Designing and prototyping WebRTC and IMS integration using open source tools
WebRTC, or Web Real-time Communications, is a collection of web standards that detail the mechanisms, architectures and protocols that work together to deliver real-time multimedia services to the web browser. It represents a significant shift from the historical approach of using browser plugins, which over time, have proven cumbersome and problematic. Furthermore, it adopts various Internet standards in areas such as identity management, peer-to-peer connectivity, data exchange and media encoding, to provide a system that is truly open and interoperable. Given that WebRTC enables the delivery of multimedia content to any Internet Protocol (IP)-enabled device capable of hosting a web browser, this technology could potentially be used and deployed over millions of smartphones, tablets and personal computers worldwide. This service and device convergence remains an important goal of telecommunication network operators who seek to enable it through a converged network that is based on the IP Multimedia Subsystem (IMS). IMS is an IP-based subsystem that sits at the core of a modern telecommunication network and acts as the main routing substrate for media services and applications such as those that WebRTC realises. The combination of WebRTC and IMS represents an attractive coupling, and as such, a protracted investigation could help to answer important questions around the technical challenges that are involved in their integration, and the merits of various design alternatives that present themselves. This thesis is the result of such an investigation and culminates in the presentation of a detailed architectural model that is validated with a prototypical implementation in an open source testbed. The model is built on six requirements which emerge from an analysis of the literature, including previous interventions in IMS networks and a key technical report on design alternatives. Furthermore, this thesis argues that the client architecture requires support for web-oriented signalling, identity and call handling techniques leading to a potential for IMS networks to natively support these techniques as operator networks continue to grow and develop. The proposed model advocates the use of SIP over WebSockets for signalling and DTLS-SRTP for media to enable one-to-one communication and can be extended through additional functions resulting in a modular architecture. The model was implemented using open source tools which were assembled to create an experimental network testbed, and tests were conducted demonstrating successful cross domain communications under various conditions. The thesis has a strong focus on enabling ordinary software developers to assemble a prototypical network such as the one that was assembled and aims to enable experimentation in application use cases for integrated environments
Inter-domain interoperability framework based on WebRTC
Nowadays, the communications paradigm is changing with the convergence of communication
services to a model based on IP networks. Applications such as messaging or voice over IP are
increasing its popularity and Communication Service Providers are focusing on offering this kind
of services.
Moreover, Web Real Time Communication (WebRTC) has emerged as a technology that
eases the creation of web applications featuring Real-Time Communications over IP networks
without the need to develop and install any plug-in. It lacks of specifications in the control plane,
leaving the possibility to use WebRTC over tailored web signalling solutions or legacy networks
such as IP Multimedia Subsystem (IMS). This technology brings a wide range of possibilities for
web developers, but Communication Service Providers are adviced to develop solutions based
on the WebRTC technology as described in the Eurescom Study P2252.
The lack of WebRTC specifications on the signalling platform together with the threats
and opportunities that this technology represents for Communication Service Providers, makes
evident the need of research on interoperability solutions for the different kind of signalling implementations
and experimentation on the best way for Communication Service Providers to
obtain the maximum benefit from WebRTC technology.
The main goal of this thesis is precisely to develop a WebRTC interoperability framework
and perform experiments on whether the Communication Service Providers should use their
existing IMS solutions or develop tailored web signalling platforms for WebRTC deployments.
In particular, the work developed in this thesis was completed under the framework of the
Webrtc interOperability tested in coNtradictive DEployment scenaRios (WONDER) experimentation
for the OpenLab project. OpenLab is a Large-scale integrating project (IP) and is part of
the European Union Framework Programme 7 for Research and Development (FP7) addressing
the work programme topic Future Internet Research and Experimentation.Actualmente, el paradigma de comunicaciones está cambiando gracias a la convergencia de los
servicios de comunicaciones hacia un modelo basado en redes IP. Aplicaciones tales como la
mensajerÃa y la voz sobre IP están creciendo en popularidad mientras los proveedores de servicios
de comunicaciones se centran en ofrecer este tipo de servicios basados en redes IP.
Por otra parte, la tecnologÃa WebRTC ha surgido para facilitar la creación de aplicaciones
web que incluyan comunicaciones en tiempo real sobre redes IP sin la necesidad de desarrollar o
instalar ningún complemento. Esta tecnologÃa no especifica los protocolos o sistemas a utilizar
en el plano de control, dejando a los desarrolladores la posibilidad de usar WebRTC sobre soluciones
de señalizaci on web especÃficas o utilizar las redes de señalización existentes, tales como
IMS. WebRTC abre un gran abanico de posibilidades a los desarrolladores web, aunque también se recomienda a los proveedores de servicios de comunicaciones que desarrollen soluciones
basadas en WebRTC como se describe en el estudio P2252 de Eurescom.
La falta de especificaciones en el plano de señalización junto a las oportunidades y amenazas
que WebRTC representa para los proveedores de servicios de comunicaciones, hacen evidente la
necesidad de investigar soluciones de interoperabilidad para las distintas implementaciones de
las plataformas de señalización y de experimentar c omo los proveedores de servicios de comunicaciones
pueden obtener el máximo provecho de la tecnologÃa WebRTC.
El objetivo principal de este Proyecto Fin de Carrera es desarrollar un marco de interoperabilidad
para WebRTC y realizar experimentos que permitan determinar bajo que condiciones
los proveedores de servicios de comunicaciones deben utilizar las plataformas de se~nalizaci on
existentes (en este caso IMS) o desarrollar plataformas de señalización a medida basadas en
tecnologÃas web para sus despliegues de WebRTC.
En particular, el trabajo realizado en este Proyecto Fin de Carrera se llevó a cabo bajo
el marco del proyecto WONDER para el programa OpenLab. OpenLab es un proyecto de
integración a gran escala en el cual se desarrollan investigaciones y experimentos en el ámbito
del futuro Internet y que forma parte del programa FP7 de la Unión Europea.IngenierÃa de Telecomunicació
Reflections on security options for the real-time transport protocol framework
The Real-time Transport Protocol (RTP) supports a range of video conferencing, telephony, and streaming video ap- plications, but offers few native security features. We discuss the problem of securing RTP, considering the range of applications. We outline why this makes RTP a difficult protocol to secure, and describe the approach we have recently proposed in the IETF to provide security for RTP applications. This approach treats RTP as a framework with a set of extensible security building blocks, and prescribes mandatory-to-implement security at the level of different application classes, rather than at the level of the media transport protocol
Advanced Videoconferencing based on WebRTC
Lately, videoconference applications have experienced an evolution towards the World Wide Web. New technologies have given browsers real-time communications capabilities. In this context, WebRTC aims to provide this functionality by following and defining standards. Being a new effort, WebRTC still lacks advanced videoconferencing services such as session recording, media mixing and adjusting to varying network conditions. This paper analyzes these challenges and proposes an architecture based on a traditional communications entity, the Multipoint Control Unit or MCU as a solution
Options for Securing RTP Sessions
The Real-time Transport Protocol (RTP) is used in a large number of
different application domains and environments. This heterogeneity
implies that different security mechanisms are needed to provide
services such as confidentiality, integrity, and source
authentication of RTP and RTP Control Protocol (RTCP) packets
suitable for the various environments. The range of solutions makes
it difficult for RTP-based application developers to pick the most
suitable mechanism. This document provides an overview of a number
of security solutions for RTP and gives guidance for developers on
how to choose the appropriate security mechanism
Large-Scale Measurement of Real-Time Communication on the Web
Web Real-Time Communication (WebRTC) is getting wide adoptions across the browsers (Chrome, Firefox, Opera, etc.) and platforms (PC, Android, iOS). It enables application developers to add real-time communications features (text chat, audio/video calls) to web applications using W3C standard JavaScript APIs, and the end users can enjoy real-time multimedia communication experience from the browser without the complication of installing special applications or browser plug-ins.
As WebRTC based applications are getting deployed on the Internet by thousands of companies across the globe, it is very important to understand the quality of the real-time communication services provided by these applications. Important performance metrics to be considered include: whether the communication session was properly setup, what are the network delays, packet loss rate, throughput, etc.
At Callstats.io, we provide a solution to address the above concerns. By integrating an JavaScript API into WebRTC applications, Callstats.io helps application providers to measure the Quality of Experience (QoE) related metrics on the end user side. This thesis illustrates how this WebRTC performance measurement system is designed and built and we show some statistics derived from the collected data to give some insight into the performance of today’s WebRTC based real-time communication services. According to our measurement, real-time communication over the Internet are generally performing well in terms of latency and loss. The throughput are good for about 30% of the communication sessions
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