The Effect of Queuing Mechanisms First in First out (FIFO), Priority  Queuing (PQ) and Weighted Fair Queuing (WFQ) on Network’s Routers and Applications

Mustafa, Mustafa El Gili; Talab, Samani A.

doi:10.4236/wsn.2016.85008

Cited by 14 publications

(6 citation statements)

References 8 publications

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“…FIFO is used in many scientific researches in order to study the behavior of systems or technologies. In a research (Mustafa & Talab, 2016), FIFO queueing is used as their first scheduling algorithm to study the effects of different scheduling algorithms on network routers and applications. In this research, the authors used Opnet Modeler as their simulation environment to compare FIFO with Priority Queueing (PR) and many other algorithms to see their effect on the network router's CPU and memory usage in terms of load, delay and throughput.…”

Section: First-in-first-out (Fifo) Scheduling Algorithmmentioning

confidence: 99%

A Study of Scheduling Algorithms in LTE -Advanced HetNet

Mohammed

2021

QZJ

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Long Term Evolution (LTE), known as 4G technology, is considered the choice for Third Generation Partnership Project (3GPP) and 3GPP2 mobile operators. LTE is expected to bring an improved user experience with full mobility support. However, to cope with the increasing number of mobile data subscribers that compete for the limited radio resources, effective network Quality of Service (QoS) mechanisms are necessary. A solution is to introduce small cells by adding low-power base stations to the existing macro-eNBs (Evolved Node B). The result is a Heterogeneous Network (HetNet) with large macro-cells combined with small cells (micro-, pico-and femto-cells) to cover areas not covered by the Macro-cells. Practically, HetNet is introduced in LTE-Advanced which is an extended version of LTE with more advanced features. Introducing HetNet in LTE-A brings challenges especially in terms of physical integration, QoS support and interference management. In this research, an architecture of HetNet integration is proposed. After that, some QoS scheduling algorithms are deployed for different types of on-going applications. Then, through the use of Riverbed Modeler, their performance parameters are studied with extensive simulations. Finally, an intensive comparison is done among the algorithms followed by a detailed discussion.

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Section: First-in-first-out (Fifo) Scheduling Algorithmmentioning

confidence: 99%

A Study of Scheduling Algorithms in LTE -Advanced HetNet

Mohammed

2021

QZJ

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“…This allows for elements of higher priority to be extracted first, independently of the order in which they are inserted into the queue [25]. In consequence, priority queuing is the basis for a class of queue scheduling algorithms that are designed to provide relatively simple method of supporting differentiated service classes [26]. Thus it is analogous to the behavior of persons "standing in a line" or "queue" where the persons leave the queue in the order they arrive.…”

Section: Priority Queue (Pq)mentioning

confidence: 99%

Implementation of a queue with priority with parameterizable variables to improve QoS

Lasso-Cardona,

Mejía-Vergara,

Grajales-Cabrera

2019

Vis. Electron.

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This article presents the implementation of a priority queue with simulated parameterized components on the scenario of a banking institution in which four main elements were used: 1) the dispenser, 2) the cashier(s), 3) the server that receives and assigns the priority of the turns, and 4) a screen that displays the order of the turns. In any banking institution, there is always a large number of users that require attention, so they implement special turns to give priority to customers, improving the quality of service. One of the important elements within the cycle of service provision is related to the waiting lines, commonly called queues. Basically one queue is managed with the First-In, First-Out discipline. In this aspect, disciplines such as queuing theory help to understand the behavior of queues by examining all the components of the waiting lists. One of the most used disciplines for the management of a queue, is the enqueue with priority. In a priority queue, the element with the highest priority is removed before any other elements. The research was carried out using mainly a quantitative approach. The main goal of this type of research is the formulation and demonstration of theories and seeks that the studies carried out can be replicated. The algorithm implemented highly parameterizable allowed the correct simulation of a priority queue that can be taken as a basis for a subsequent application in any type of organization.

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“…Packet scheduling specifies the service policy of a queue within a node (e.g. an IP router, an ATM switch) [15]. In practice, scheduling decides the order that is used to pick the packets out of the queue and to transmit them over the channel.…”

Section: Scheduling Algorithmsmentioning

confidence: 99%

Simevents/ Stateflow base Reconfigurable Scheduler in IP Internet Router

AL-Allaf¹

2018

IJCDS

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Quality of Service (QoS) is becoming increasingly important with the rise of multimedia applications (such as voice over IP (VoIP), video conferencing, and so on) in public data networks. These applications demand real-time service, while the networks should still be able to transfer also other traffic reliably (e.g., data, email, and WWW). In this paper, we concern how to improve the QoS of multimedia applications (Voice and video traffic) in DiffServ internet router by using the reconfigurable technique. Therefore we design an QoS model called Reconfigurable Scheduling Model (RSM) for real-time traffic in Diffserv router. In this model, we use the strict priority technique for the voice traffic to reduce the delay and then improve the QoS. While for video traffic, a hardware reconfigurable technique is used to provide the flexibility that improves QoS levels when compared to other techniques such as software-only implementations. This permits the run-time reconfiguration of the router resources, i.e., to change their functionality (from one scheduling algorithm to another), to adapt the fluctuation in traffic parameter. We choose two of the most widely used schedulers (CBWFQ, and MDRR) to support real-time allocations and to improve the QoS of video traffic. The reconfiguration or the switching between those two schedulers is based on queuing delay of the video traffic. To evaluate the proposed approach, the queuing model was built and simulated with MATLAB Simevents and Stateflow components. The result of simulation shows an improvement in QoS of voice and video traffics.

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The Effect of Queuing Mechanisms First in First out (FIFO), Priority Queuing (PQ) and Weighted Fair Queuing (WFQ) on Network’s Routers and Applications

Cited by 14 publications

References 8 publications

A Study of Scheduling Algorithms in LTE -Advanced HetNet

A Study of Scheduling Algorithms in LTE -Advanced HetNet

Implementation of a queue with priority with parameterizable variables to improve QoS

Simevents/ Stateflow base Reconfigurable Scheduler in IP Internet Router

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