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There has been a dramatic increase in interactive cloud based software applications. Compared to classical real-time media applications (voice over IP (VoIP)/conferencing) and non real-time file delivery, these interactive software applications have unique characteristics: 1) they are delay sensitive yet demand in order and reliable data delivery, and 2) the traffic is usually bursty. Traditional...
In this paper, we study the effect of the variation of process parameters on the performance of a voltage controlled oscillator (VCO) and an inverter with technology scaling. The spread in performances is shown to be Gaussian in nature, considering the fact that the distributions of process parameters are also Gaussian in nature. The spreads in performances increase with technology scaling. These...
A high-frequency digital controller that includes an optimized analog-digital converter (ADC) with a novel formulation of digital error value based on target clock frequency and converter output voltage is presented in this paper. A programmable look-up table-based digital compensator is implemented for fast processing the feedback error. Limitations of a hybrid digital pulsewidth modulator (DPWM)...
The IEEE 802.16 standard specifies a mesh mode of operation which permits the setup of wireless mesh networks (WMN) with per-link QoS support. The standard specifies both distributed as well as centralized reservation schemes. Distributed scheduling is highly flexible, and enables operation of the WMN even in the absence of a central controlling instance or base station. A systematic study of strategies...
We consider multi-rate peer-to-peer multi-party conferencing applications, where different receivers in the same group can receive videos at different rates using, for example, scalable layered coding. The quality of video received by each receiver can be modeled as a concave utility function of the video rate. We study and address the unique challenges introduced by multi-rate setting as compared...
To prevent subscriber churn, network service providers of VoD, SDV and IPTV have a pressing need to pro-actively detect, isolate and fix outages within an access network. Network induced degradations prove to be detrimental for streaming applications. This typically leads to a poor quality of experience (QoE) for subscribers. By monitoring key functional points of the access network for traces of...
The proliferation of mobile electronic equipment is driving the need for aggressive real-time power management techniques, beyond the incremental efficiency improvements in DC-DC switching converters. In dynamic voltage scaling (DVS) power managament technique, performance, i.e. the operating clock frequency is adjusted with the time-varying workload and the supply voltage is scaled down dynamically...
The continued explosion of new virus/worm and other security attacks in the Internet and the tremendous propagation speed of self-propagating attacks has led to network security being considered as a design criterion rather than an afterthought. Attack prevention, detection, and mitigation mechanisms can be broadly classified as network based or host based. Network based security mechanisms have been...
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