A fuzzy queuing coherent hierarchical location-allocation model is developed for congested systems. The parameters of the model are approximately evaluated and stated as fuzzy-numbers. The coverage of demand nodes is also considered in an approximate manner and is stated by the degree of membership. Using the queuing theory and fuzzy conditions, a coherent hierarchical model is developed for th...

Based on queuing theory we develop an analytical approximation for low and high priority packet delays in a Spatial Reuse Protocol (SRP) ring.

<span>Satellite communication is a telecommunications technique that uses satellites as connecting component, for example VSAT. In antenna installation, there an important process which called the cross-polarization. Cross-polarization one cannot be released inside installation of VSAT antennas satellite communication. Sometimes, in this process, user queue will occur. Queuing theory expl...

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...

Work zone related traffic delay is an important cost component on freeways with maintenance activities. This study demonstrates that delays are always underestimated by using the deterministic queuing theory. Computer simulation is a valuable approach of estimating delay under variety of existing and future conditions. However, a single simulation run, which can be quiet costly in terms of both...

Real-time media communication requires not only congestion control, but also minimization of queuing delays to provide interactivity. In this work we consider the case of real-time communication between web browsers (WebRTC) and we focus on the interplay of an end-to-end delay-based congestion control algorithm, i.e. the Google congestion control (GCC), with two delay-based AQM algorithms, name...

This paper analyzes the performance of single-source and single-relay SR-CARQ protocol in TDMA wireless communication system. We establish its M/G/1 queuing model with vacations, and provide the expressions of its system time delay and saturation throughput. Then the analysis of theory and simulation results under the slow Raleigh fading channel show that under what conditions the SR-CARQ proto...

This study analyzes the waiting lines for solid organ transplants in Brazil's Unified National Health System. By using a queuing theory model, we estimate the waiting times for different organs under alternative scenarios. The model reveals the elasticity of various waiting times with respect to arrival and service rates for organ transplantation within the system. Average waiting time for a so...