This chapter proposes a novel concept towards the deployment of a networked 'Media Ecosystem'. Th... more This chapter proposes a novel concept towards the deployment of a networked 'Media Ecosystem'. The proposed solution is based on a flexible cooperation between providers, operators, and end-users, finally enabling every user first to access the offered multimedia services in various contexts, and second to share and deliver his own audiovisual content dynamically, seamlessly, and transparently to other users. Towards this goal, the proposed concept provides content-awareness to the network environment, network-and user contextawareness to the service environment, and adapted services/content to the end user for his best service experience possible, taking the role of a consumer and/or producer.
Towards the Future Internet: A European Research Perspective, 2009
Future Internet will have to cope with yet unknown terminals and services (even users), in a numb... more Future Internet will have to cope with yet unknown terminals and services (even users), in a number and heterogeneity never seen before. So, flexibility or adaptability will be considered as one of the most important design principles. This flexibility will demand different kinds of awareness both in the ends and in every node in the service supplying chain, while targeting users' satisfaction as the final goal of any management process. Although virtualization and "everything is a service" approaches seem to be promising foundations to guarantee this flexibility, Future Internet will be built upon real world mobile wireless network technologies, so that cross-layers issues and quality constraints will persist. Quality of Experience (QoE) could play a significant role there, since it could provide an unified metric, isolating users from low level details or complex NQoS definitions. We will also show an example of how user-aware network tuning mechanisms are able to provide similar users' QoE with lower resources consumption and therefore propose that QoE and *-awareness were considered in the Future Internet design from the very beginning.
2009 Global Information Infrastructure Symposium, 2009
The media content provision in a variety of quality and price levels, through the concept of the ... more The media content provision in a variety of quality and price levels, through the concept of the Perceived Quality of Service (PQoS) is considered as the most dominant among the various future visions of multimedia networking. The concept of the PQoS-driven service provision, based on multimedia content adaptation across heterogeneous networks, will become in the near future a key-issue among service providers (SPs). This paper presents, describes and proposes a novel cross layer monitoring architecture, driven by a prototype mapping between Network QoS (NQoS) and PQoS parameters, aiming at providing perceived performance verification with respect to the QoS guarantees specified in contractual agreements between providers and end-users. Towards this, the proposed framework takes sophisticated actions for real time media content adaption with aim the optimization of the finally delivered perceptual quality and the maximization of the user experience. The validity of the proposed model is tested by a real test-bed, demonstrating satisfactory accuracy of the network measurements and the overall feasibility of the proposed monitoring solution.
This paper presents the implementation and testing of a complete transmission and control chain o... more This paper presents the implementation and testing of a complete transmission and control chain of a DVB-T network architecture featuring QoS capabilities, by enhancing in real time the PQoS degradation, resulting from a fading/noisy downlink DVB-T channel.
ABSTRACT. This paper presents an assessment method for fast and quantified estimation of the Perc... more ABSTRACT. This paper presents an assessment method for fast and quantified estimation of the Perceived Quality of Service (PQoS) for homogeneous MPEG-4 video content, enabling optimized utilization of the corresponding storage and bandwidth resources. Besides, the Mean Perceived Quality of Service (MPQoS) as a function of the video encoding rate is introduced and exploited as a metric for objective video
This paper presents the architecture and the experimental evaluation of a novel QoE-aware Mobile ... more This paper presents the architecture and the experimental evaluation of a novel QoE-aware Mobile IPTV and VoIP infrastructure based on the IMS framework. The paper shows that the proposed management system (i.e. MCMS) provides efficiently QoE enhancement in the provision of mobile VoIP and IPTV services in case that network-related problems occur.
This chapter proposes a novel concept towards the deployment of a networked 'Media Ecosystem'. Th... more This chapter proposes a novel concept towards the deployment of a networked 'Media Ecosystem'. The proposed solution is based on a flexible cooperation between providers, operators, and end-users, finally enabling every user first to access the offered multimedia services in various contexts, and second to share and deliver his own audiovisual content dynamically, seamlessly, and transparently to other users. Towards this goal, the proposed concept provides content-awareness to the network environment, network-and user contextawareness to the service environment, and adapted services/content to the end user for his best service experience possible, taking the role of a consumer and/or producer.
Towards the Future Internet: A European Research Perspective, 2009
Future Internet will have to cope with yet unknown terminals and services (even users), in a numb... more Future Internet will have to cope with yet unknown terminals and services (even users), in a number and heterogeneity never seen before. So, flexibility or adaptability will be considered as one of the most important design principles. This flexibility will demand different kinds of awareness both in the ends and in every node in the service supplying chain, while targeting users' satisfaction as the final goal of any management process. Although virtualization and "everything is a service" approaches seem to be promising foundations to guarantee this flexibility, Future Internet will be built upon real world mobile wireless network technologies, so that cross-layers issues and quality constraints will persist. Quality of Experience (QoE) could play a significant role there, since it could provide an unified metric, isolating users from low level details or complex NQoS definitions. We will also show an example of how user-aware network tuning mechanisms are able to provide similar users' QoE with lower resources consumption and therefore propose that QoE and *-awareness were considered in the Future Internet design from the very beginning.
2009 Global Information Infrastructure Symposium, 2009
The media content provision in a variety of quality and price levels, through the concept of the ... more The media content provision in a variety of quality and price levels, through the concept of the Perceived Quality of Service (PQoS) is considered as the most dominant among the various future visions of multimedia networking. The concept of the PQoS-driven service provision, based on multimedia content adaptation across heterogeneous networks, will become in the near future a key-issue among service providers (SPs). This paper presents, describes and proposes a novel cross layer monitoring architecture, driven by a prototype mapping between Network QoS (NQoS) and PQoS parameters, aiming at providing perceived performance verification with respect to the QoS guarantees specified in contractual agreements between providers and end-users. Towards this, the proposed framework takes sophisticated actions for real time media content adaption with aim the optimization of the finally delivered perceptual quality and the maximization of the user experience. The validity of the proposed model is tested by a real test-bed, demonstrating satisfactory accuracy of the network measurements and the overall feasibility of the proposed monitoring solution.
This paper presents the implementation and testing of a complete transmission and control chain o... more This paper presents the implementation and testing of a complete transmission and control chain of a DVB-T network architecture featuring QoS capabilities, by enhancing in real time the PQoS degradation, resulting from a fading/noisy downlink DVB-T channel.
ABSTRACT. This paper presents an assessment method for fast and quantified estimation of the Perc... more ABSTRACT. This paper presents an assessment method for fast and quantified estimation of the Perceived Quality of Service (PQoS) for homogeneous MPEG-4 video content, enabling optimized utilization of the corresponding storage and bandwidth resources. Besides, the Mean Perceived Quality of Service (MPQoS) as a function of the video encoding rate is introduced and exploited as a metric for objective video
This paper presents the architecture and the experimental evaluation of a novel QoE-aware Mobile ... more This paper presents the architecture and the experimental evaluation of a novel QoE-aware Mobile IPTV and VoIP infrastructure based on the IMS framework. The paper shows that the proposed management system (i.e. MCMS) provides efficiently QoE enhancement in the provision of mobile VoIP and IPTV services in case that network-related problems occur.
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Papers by H. Koumaras