The European Regulator Group (ERG) defines Bitstream Access Service as a wholesale service offered by a broadband network operator with significant market power to an Internet Service Provider, and identifies it as a market subject to regulation. This paper develops a cost model for the Bitstream Access Service under xDSL technology, following the recommendations of the ERG, considering differe...

A novel routing scheme is proposed for virtual cutthrough routing that attempts to combine the low routing delay of deterministic routing with the exibility and low queuing delays of adaptive routing. This hybrid routing mechanism relies on a pipelined implementation where di erent paths and stages of the router are used for di erent routing modes. A simulation based experimental evaluation of ...

This paper proposes the virtual flux based direct power control for Vienna rectifier. No need for the input voltage sensors, the current regulation loop and PWM voltage modulation block along with the active and reactive power decoupling are some of the salient advantages of this method that make it suitable for controlling the conventional active rectifiers. However, due to the three-level nat...

this paper presents some analyses about the robust practical stability of a class of nonlinear affine systems in the presence of non-vanishing perturbations based on the passivity concept. the given analyses confirm the robust passivity property of the perturbed nonlinear systems in a certain region. moreover, robust control laws are designed to guarantee the practical stability of the perturbe...

Regarding the fact that getting a suitable combination of the human resources and service stations is one of the important issues in the most service and manufacturing environments, In this paper, we have studied the two models of planning queuing systems and its effect on the cost of the each system by using two fuzzy queuing models of M/M/1 and M/E2/1. In the first section, we have compar...

In this article, different buffering techniques used to solve the contention problem in ATM switching architectures are compared. Then, the buffer requirements needed to achieve a given Quality of Service (QoS) is determined. Based on the results, we propose a Combined Central and Output Queuing (CCOQ) technique to be used in designing large-scale ATM switches for high-speed networks.

Fairness queuing has recently been proposed as an e ective way to insulate users of large computer communication datagram networks from congestion caused by the activities of other (possibly ill-behaved) users. Unfortunately, fair queuing as proposed by Shenker et al. [DKS89] requires that each conversationz be mapped into its own queue. While there are many known methods of implementing this t...

Modern routers and switch fabrics can have hundreds of input and output ports running at up to 10 Gb/s; 40 Gb/s systems are starting to appear. At these rates, the performance of the buffering and queuing subsystem becomes a significant bottleneck. In high performance routers with more than a few queues, packet buffering is typically implemented using DRAM for data storage and a combination of ...

The toll road service is planned and built to fund construction management of traffic operations. Although the has several benefits, it also challenges by creating a queue in event high traffic. Queues at addition pollution waiting time costs expose drivers accidents affect economy country. Queuing problems highway gates exits due have become main concern for transport managers planners because...