1,140 research outputs found
Quality of experience in telemeetings and videoconferencing: a comprehensive survey
Telemeetings such as audiovisual conferences or virtual meetings play an increasingly important role in our professional and private lives. For that reason, system developers and service providers will strive for an optimal experience for the user, while at the same time optimizing technical and financial resources. This leads to the discipline of Quality of Experience (QoE), an active field originating from the telecommunication and multimedia engineering domains, that strives for understanding, measuring, and designing the quality experience with multimedia technology. This paper provides the reader with an entry point to the large and still growing field of QoE of telemeetings, by taking a holistic perspective, considering both technical and non-technical aspects, and by focusing on current and near-future services. Addressing both researchers and practitioners, the paper first provides a comprehensive survey of factors and processes that contribute to the QoE of telemeetings, followed by an overview of relevant state-of-the-art methods for QoE assessment. To embed this knowledge into recent technology developments, the paper continues with an overview of current trends, focusing on the field of eXtended Reality (XR) applications for communication purposes. Given the complexity of telemeeting QoE and the current trends, new challenges for a QoE assessment of telemeetings are identified. To overcome these challenges, the paper presents a novel Profile Template for characterizing telemeetings from the holistic perspective endorsed in this paper
Development of Campus Video-Conference System Based on Peer-To-Peer Architecture
Peer to Peer (P2P) systems inherently have high scalability, robustness and fault tolerance because there is no centralized server and the network self-organizes itself. This is achieved at the cost of higher latency for locating the resources of interest in the P2P overlay network. This paper describes the design and implementation of campus video conference system based on P2P architecture that was tested within premises of Ladoke Akintola University of Technology, Ogbomoso, Nigeria. The proposed Campus video conference system is made up of five modules which are the media stream engine, the conferencing control protocol, transmission module, TCP/UDP module and the user interface module. The media stream engine is responsible for audio/video capture and playback, the conferencing control protocol defines a set of conventions governing the structure and behavior of communication messages, the transmission module consists of a peer and a distribution network constituting of the peers also the delivery and exchange of streaming data while the audio manager and video manager use TCP/UDP to broadcast to other peer. The proposed system will offer smooth video conferencing with low delay and seldom and short freezes. It is believed that this videoconference system will bring video telephony to a new level of quality and will lead to a new trend in everyday communications in the university community
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
mensajería 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 tecnología 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 tecnología 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 específicas 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 tecnología 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
tecnologías 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.Ingeniería de Telecomunicació
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