-
[show abstract]
[hide abstract]
ABSTRACT: This paper proposes a novel quality-oriented algorithm for multiple-source delivery of multimedia over heterogeneous wireless networks, which enables maintaining high levels of user-perceived quality. Unlike existing solutions, which perform delivery adaptation by adjusting the original multimedia quality to varying network conditions, this solution is based on dynamically balancing the multimedia content among multiple streams in order to achieve its goal. The proposed scheme and three other known approaches are compared in terms of estimated user-perceived quality. Simulation results show how this scheme outperforms the other solutions, including cases where the number of simultaneous receivers increases significantly. In addition, real environment tests show how the proposed scheme provides higher quality in terms of both objective and subjective metrics than competing approaches.
IEEE Transactions on Broadcasting 07/2011; · 1.70 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: This paper proposes a novel buffer underflow avoidance scheme for multiple-source multimedia delivery which enables maintaining high user perceived quality in highly loaded network conditions. Unlike existing solutions which perform delivery adaptation by adjusting the original multimedia quality to varying network conditions, this solution is based on dynamic buffer occupancy estimation for multiple streams to achieve its goal. The proposed scheme and three other approaches are compared in terms of estimated user perceived quality. Simulation results show how this scheme outperforms the other solutions including when the number of simultaneous receivers increases significantly.
IEEE Communications Letters 07/2010; · 0.98 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Video recording in IPTV systems is a promising service that provides time-shifted services in relation to storing TV content closer to user devices such as set-top boxes. Existing approaches do not support collaboration between nodes which have correlated contents, a fact that can affect the performance of the overall system. To make this service more interactive and proactive, this paper presents the architecture using the smart personal information network (Smart PIN) as a novel performance-based content sharing network for IPTV content which uses a user-centric utility-based multimedia data replication scheme (MDRS). This allows the exchange of data based on both network performance and user interest in exchanged multimedia content in order to achieve efficient content sharing. The proposed solution is evaluated through extensive simulations and results show much improved behavior in comparison with two other existing general purpose data replication schemes.
IEEE Transactions on Broadcasting 07/2009; · 1.70 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Information overload and convergence of devices aggravate the difficulties of accessing data distributed among various user devices especially when this is performed by mobile users and over heterogeneous wireless networks. Existing data replication systems help increase the performance of the distributed data system, but they do not consider users' different levels of interest in various pieces of data and neither heterogeneous wireless connectivity issues. This paper presents the Smart Personal Information Network (Smart PIN), a performance and cost-aware personal information network which uses a novel user- centric utility-based data replication scheme to exchange content automatically, based on both network performance and user interests. The proposed user-centric data replication scheme's evaluation, through simulation, shows improved results in comparison with existing solutions.
Communications Workshops, 2008. ICC Workshops '08. IEEE International Conference on; 06/2008
-
[show abstract]
[hide abstract]
ABSTRACT: Next generation wireless networks rely on heterogeneous connectivity technologies to support various rich media services such as personal information storage, file sharing and multimedia streaming. Due to users' mobility and dynamic characteristics of wireless networks, data availability in collaborating devices is a critical issue. In this context Smart PIN was proposed as a personal information network which focuses on performance of delivery and cost efficiency. Smart PIN uses a novel data replication scheme based on individual and overall system utility to best balance the requirements for static data and multimedia content delivery with variable device availability due to user mobility. Simulations show improved results in comparison with other general purpose data replication schemes in terms of data availability.
Broadband Multimedia Systems and Broadcasting, 2008 IEEE International Symposium on;
