Recently, heavy-traffic theory has been applied for understanding behavior of delay in switches. The next section explains the heavy traffic scaling. With some toy examples, it discusses how Brownian motion arises in delay analysis and the idea of state-space collapse. Section 2 defines a switch and sketches a standard method for its stability analysis using the fluid scaling. For fluid scaling...

This paper comprehensively reviews ten different delay element architectures for use in CMOS VLSI design. They can be categorized into three separate families: transmission gate based, cascaded inverter based, and voltage-controlled based. Six of these delay elements are already in use and we propose four new ones. We compare these delay elements, both analytically and using simulations, in ter...

The majority of analytical work on the performance of IEEE 802.11 [1] focuses on predicting the throughput and the mean delay of only the medium access, although higher layer applications and protocols are interested in the total performance of the MAC layer. Seen in this perspective, surprisingly little focus has been on predicting the queueing delay. The main contribution of this paper oppose...

We propose a time-domain approach to detect frequencies, frequency couplings, and phases using nonlinear correlation functions. For frequency analysis, this approach is a multivariate extension of discrete Fourier transform, and for higher-order spectra, it is a linear and multivariate alternative to multidimensional fast Fourier transform of multidimensional correlations. This method can be ap...

We propose a new simulation algorithm for combinational circuits which accurately models delay variations in the gates. The algorithm can also be used for the timing veriication of asynchronous circuits, eg hazard detection, race/oscillation of sequential circuits, etc. The basic idea is to assign a time variable to each signal transition (edge). The gate delays translate to algebraic relations...

Lasers, especially semiconductor lasers, are known to exhibit an amazing range of dynamical behaviour when subjected to external influences. In practically all investigations of laser dynamics the question is: how does the dynamics of a given laser system depend on the control parameters? The approach in a typical experiment is to change one such parameter and record the dynamics, sweeping back...

Using coherence analysis (which is an extensively used method to study the correlations in frequency domain, between two simultaneously measured signals) we estimate the time delay between two signals. This method is suitable for time delay estimation of narrow band coherence signals for which the conventional methods cannot be reliably applied. We show by analysing coupled Rössler attractors w...

The implementation of bounded-delay services over integrated services networks relies admission control mechanisms that in turn use end-to-end delay computation algorithms. For guaranteed-rate scheduling algorithms, such as fair queueing, delay computation based on Cruz' service curve model performs very well. Many currently deployed networks, be they packet-switched or ATM based, rely on non-g...

Heterogeneous wireless networks are capable of effectively leveraging different access technologies to provide a wide variety of coverage areas. In this paper, the coexistence of WiFi and visible light communication (VLC) is investigated as a paradigm. The delay of two configurations of such heterogeneous system has been evaluated. In the first configuration, the non-aggregated system, any requ...

Two types of coherent delay-locked loops (DLL) are considered in this paper as delay trackers in multiuser CDMA receivers. The rst approach is based on the parallel interference cancellation (PIC) method. PIC based delay trackers require the estimation of channel parameters and data symbols of all users to construct the multiple-access interference (MAI) estimates. The other method is based on ...