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More and more, multimedia services are being accessed via fixed and mobile networks. These services are typically much more sensitive to packet loss, delay and/or congestion than traditional services. In particular, multimedia data is often time critical and, as a result, network issues are not well tolerated and significantly deteriorate the userpsilas quality of experience (QoE). We therefore propose...
A serious bottleneck in real-time multimedia applications is the non-availability of required network bandwidth. While much research has been done on multimedia compression and network resource optimization, multimedia delivery is still a big concern especially for scarce resource networks. The virtues of network aware video coding and application of domain specific compression techniques have not...
Wireless network topologies are used more and more in our days and their support was recently extended to the mobile devices market. This enables reception of high bandwidth Internet applications such as interactive television and data exchange. Because of the high demand of reliable and cost-efficient services a lot of work is still required for optimal results. The paper investigates the behavior...
Managing client downstream bandwidth is an issue that is rapidly gaining in importance due to the increasing extent to which multimedia content is being exploited in networked applications. Depending on its characteristics, this multimedia content is exchanged in either a real-time or non real-time manner. In this paper, we present the NIProxy, a network intermediary which introduces different types...
Mobile WiMAX aims to provide multimedia multicast/broadcast service (MBS) as well as elastic data service. However, supporting delay sensitive applications like video/audio streaming is still challenging, which requires both efficient handling of link bandwidth and reducing handover delays. To reduce the handover delay in MBS, the IEEE 802.16e standard defines an MBS zone, which is a group of base...
This paper presents a fuzzy based bandwidth allocation method by using bandwidth borrowing scheme for multimedia wireless networks in the context of future generation cellular networks. In the proposed scheme, bandwidth is borrowed from the applications that are already running in a cell for the new/handoff calls based on the fuzzy parameters such as application priority, age of the connection and...
The problem that the required bandwidth in the Internet multi-media networks varies over time and can be dynamically adjusted is not well modeled and understood in the literature. In this paper, we propose models and algorithms of a single link represented by a multi-class Erlang loss system. We also propose efficient approaches for dimensioning the link under multi-class traffic.
Multimedia and videoconferencing applications transmitted over satellite links are being pushed towards higher frequency bands where more usable bandwidth is present. The service availability of Ka-band satellite links is subject to considerable uncertainty, relying on channel phenomena such as interference and the unpredictability of local weather. This paper presents a model of the interference...
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