The Integrated Cellular and Ad hoc Relaying (iCAR) system is a representative heterogeneous wireless system, proposed to address the congestion problem in the wireless networks. In this paper, we present an analytic model based on Markov chains for the queuing delay performance of iCAR. Our results show that the new call requests in iCAR have a significantly lower queuing delay than that of the...

The paper presents different combinations of queuing methods and their impact on the VoIP traffic delay within the network. In our experiment we combined three of the most useful queuing methods where we put together priority queuing (PQ) with class-based weighted fair queuing (CBWFQ), custom queuing (CQ) with CBWFQ and weighted fair queuing (WFQ) with CBWFQ. Each hybrid method is compared with...

Abstract: In this study, we consider a queuing model extension for a production system composed of several parallel machines and the same number of transporters. To obtain the minimum waiting time of the jobs in the queue, we present an exact solution for the proposed queuing model. The solution integrates M/M/C system with M/M/1 system. We obtain explicit expressions for its steady-state behav...

Recently, techniques have been developed for estimating confidence intervals when simulating stochastic systems having a regenerative structure. These techniques are applied to the simulation of a queuing model of a computer system’s automated tape library. Theoretical and practical issues related to the application of these techniques are addressed. An interesting feature of the automated tape...

Due to many damages that human activities have imposed on the environment, authorities, manufacturers, and industry owners have taken into account the development of supply chain more than ever. One of the most influential and essential human activities in the supply chain are transportation which green vehicles such as electric vehicles (EVs) are expected to generate higher economic and enviro...

This paper is concerned with the propagation of delays within a large network of major airports. As more airports in the United States and in Europe become more congested, it also becomes increasingly likely that delays at one or more airports will spread to other parts of the network. We describe an analytical queuing and network decomposition model developed to study this complex phenomenon. ...

In this paper, we propose a design and implementation method for priority queuing mechanisms on FPGAs. First, we describe behavior of WFQ (weighted fair queuing) with several parameters in a model called concurrent periodic EFSMs. Then, we derive a parameter condition for the concurrent EFSMs to execute their transitions without deadlocks in the specified time period repeatedly under the specif...

This paper presents a fuzzy queuing location model for congested system. In a queuing system there are different criteria that are not constant such as service rate, service rate demand, queue length, the occupancy probability of a service center and Probability of joining the queue line. In this paper with fuzzifying all of these variables, will try to reach an accurate real problem. Finally w...

This paper considers various Markov-modulated processes which have been used in the literature to model internet traffic. In particular, such processes have been used to replicate the long-range dependent nature of internet traffic and the justification for doing so is that long-range dependence (LRD) has important effects on delays and buffer occupancy in traffic models. However, in combinatio...