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Quality of service (QoS) is a key problem in wireless environments where bandwidth is scarce and channel conditions are time varying and sometimes implies highly packet losses. IEEE 802.11b/g/a wireless LAN (WLAN) are the most widely used WLAN standards today, and the IEEE 802.11e QoS enhancement standard exists and introduces QoS support for multimedia applications. This paper presents a class based...
Using simulations, we analyze the performance of new TCP variants currently used in the Internet and that gradually replacing TCP NewReno, as they are already activated by default in operating systems or network equipment. We compare these new variants using some metrics that have been recently standardized in order to evaluate new congestion control mechanisms. We observe a trade-off between more...
TCP is the most widely used congestion protocol in the Internet. However, TCP has some limitations, even in the wired world, such as not providing high utilizations in high bandwidth-delay product networks, and introducing high load and overhead in the network. Due to these limitations, several congestion protocols have been proposed. Some of the most known and recent protocols developed to provide...
We present in this work the performance evaluation of MPEG-4 video transmission with our proposed single rate multicast protocol named Adaptive Smooth Multicast Protocol (ASMP). ASMP key attributes are: a) adaptive scalability to large sets of receivers, b) TCP-friendly behavior, c) high bandwidth utilization, and finally d) smooth transmission rates which are suitable for multimedia applications...
The wide range of applications that are supported on the Internet requires it to deliver a diverse set of classes of service. For example, network providers need to support both delay-sensitive multimedia services and less time-sensitive applications such as web browsing and peer-to-peer transfers. Differentiated routing is one approach to delivering these different classes of service. In this paper...
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