Most of the centralized QoS mechanisms for WLAN MAC layer are only able to guarantee QoS parameters for CBR video traffic effectively. On the other hand, the existing distributed QoS mechanisms are only able to differentiate between various traffic streams without being able to guarantee QoS. This paper addresses these deficiencies by proposing a new distributed QoS scheme that guarantees QoS p...

One major challenge in designing future generation wireless networks is how to provide quality-ofservice (QoS) guarantees to various multimedia applications. In this paper we consider deterministic qualityof-service guarantees. We propose a method for constructing a packet dropping mechanism that makes decisions as to when we need to drop packets while still not violating any QoS guarantees. Th...

Given a pre-recorded VBR video, we have proposed an O(n) algorithm to smooth the transmission schedule with the minimum required resources. n is the number of video frames. As n is usually very large and varying for different videos, it is not suitable for online computation. To facilitate resource management and admission control for QoS (quality-of-service) guarantees, we need to explore the ...

BACKGROUND Studies aiming to identify palliative care populations have used data from death certificates and in some cases hospital records. The size and characteristics of the identified populations can show considerable variation depending on the data sources used. It is important that service planners and researchers are aware of this. AIM To illustrate the differences in the size and char...

Real-time continuous media traac, such as digital video and audio, is expected to comprise a large percentage of the network load on future high speed packet switch networks such as ATM. A major feature which distinguishes high speed networks from traditional slower speed networks is the large amount of data the network must manage. For eecient network usage, traac control mechanisms are essent...

We propose a new routing algorithm based on online estimation of the link load dynamics and prior information on flow holding times. The motivation for this proposal lies in supporting traffic flows such as VBR or associated with rate adaptive applications. Such traffic requires a minimal guaranteed bandwidth, but can see improved performance when sharing excess bandwidth not used to meet guara...

BACKGROUND Little is known about the type of care older people of different ages receive at the end of life. The goal of treatment is an important parameter of the quality of end-of-life care. This study aims to provide an evaluation of the main goal of treatment in the last week of life of people aged 86 and older compared with those between 75 and 85 and to examine how treatment goals are ass...

In this work, the region of achievable quality-ofservice (QoS) is precisely described for a system of real-time heterogeneous variable bit rate (VBR) sources competing for slots (packet transmission times) of a time division multiple access (TDMA) frame. The QoS for each application is defined in terms of a maximum tolerable packet-dropping probability. Packets may be dropped due to delay viola...

The raising grandness of multimedia diligence has led to the increase in the usage of network resources. For assuring agreed Quality of Service (QoS) and for better network management, thorough analysis of traffic characteristics, modeling and prediction are crucial. In this process, a simple and effective traffic forecasting method which is suitable for time period prediction of MPEG encoded v...

In this paper, we address the problem of providing diierent levels of performance guarantees or quality-of-service (QOS) for disk I/O. We classify disk requests into three categories based on the provided level of service. We propose an integrated scheme that provides diierent levels of performance guarantees in a single system. We propose and evaluate a mechanism for providing deterministic se...