Review of WiMAX Scheduling Algorithms and Their Classification

Yadav, Anju; Vyavahare, Prakash D.; Bansod, Prashant

doi:10.1007/s40031-014-0145-5

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…The Value of Modulation = (ln (5 * Bit Error Rate) -(1.5 * Signal to noise ration)) / (ln (5 * Bit Error Rate)) The process of the transmission for the SFs services in table 8 will choose the minimum number of packets to be sent, and the remaining unused data slots will be rounded again to be used using the round robin manner from UGS to BE [6]. Therefore, as a result, the OFDMA frame will be occupied partially by the types of PUSC subchannels, resulting in 48 sub-carriers for a total of 3 frames of the OFDMA that can be found in a single slot.…”

Section: Flowchart Diagram : Allocating Standard Methodsmentioning

confidence: 99%

“…To simulate this, let's say that the data inserted and the minimum number of slots are known for each SF, for assigning the number of slots. The unused slots number will be calculated by 6 (6) After applying the equation, and the slot number was sufficient, the remaining unused slots will be allocated using round-robin manner for the mentioned services types, resulting in a decrease in the system delay while increasing the system throughput. Finally to ensure the quality of the system we must calculate the packets drop number using the equation 7, and if the result is bigger than zero, it means there are some packet dropped otherwise not.…”

Section: Flowchart Diagram : Allocating Standard Methodsmentioning

confidence: 99%

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IEEE 802.16 E&M SYSTEMS BANDWIDTH RESOURCE ALLOCATION PERFORMANCE INVESTIGATION

QasMarrogy¹

2019

JEASD

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This paper concentrates on the downlink resource allocation strategy for the bandwidth in Mobile WiMAX system based on IEEE802.16E and IEEE802.16M standards. Most of the recent algorithms deal with giving higher priority to the applications that have higher delay tolerance known as real-time applications. While the applications using the non-real time doesn't have enough priority or interest. still, the real-time applications should have a higher priority than the non-real time applications to be served first. In this paper, a higher priority and QoS (quality of services) will be given to the real-time applications while the applications for the non-real time will be helped to give some fairness to decrease the dropping packets without starving. It will be done by merging two major technologies (minimum resource allocation and round robin manner. Also, a comparison will be done between the IEEE802.16E and IEEE802.16M systems to evaluate the system throughput, the resource allocation, the average end-to-end delay, and the data packet dropping to demonstrate the affecting algorithm of the entire system. Finally, the paper will demonstrate that the total system will be enhanced by reducing the nonefficient dropping packets. As a result, it will simulate and verify that there is lesser packet drop in the applications of real and non-real time. therefore, every single service and the total system throughput will be enhanced.

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Section: Flowchart Diagram : Allocating Standard Methodsmentioning

confidence: 99%

Section: Flowchart Diagram : Allocating Standard Methodsmentioning

confidence: 99%

IEEE 802.16 E&M SYSTEMS BANDWIDTH RESOURCE ALLOCATION PERFORMANCE INVESTIGATION

QasMarrogy¹

2019

JEASD

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“…The TCP system detects the loss of a particular packet that slows down the transmission rate by halving the window size and then gradually increasing it. For scheduling algorithms, many optimization criteria can be considered, such as the maximum total data rate [21]. Each client requires the execution of a service, so a service consists of one or more tasks.…”

Section: Related Workmentioning

confidence: 99%

Choosing the best quality of service algorithm using OPNET simulation

Eltaib

Alshammari

Boukrara

et al. 2022

IJECE

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The concept of quality of service (QoS) is a new computer technology. Previously, there was a slow internet connection to access the sites and it was slow to send information. But now, it requires speeding up the traffic and increasing the efficiency for audio and video. In this study, we discuss the concepts of QoS provided over the network to achieve these goals. This study aims to compare six algorithms to control the QoS, then, the best algorithm will be selected to improve the traffic. These algorithms are named first in first out (FIFO), priority queuing (PQ), custom queuing (CQ), CQ with low latency queuing (LLQ), weighted fair queuing (WFQ), WFQ with low latency queuing (LLQ), so the behavior of these algorithms can be measured. The results obtained by comparing between them using OPNETsimulation show that the best algorithm is the priority queuing algorithm, followed by CQ, then CQ with LLQ, then WFQ, then WFQ with LLQ and finally FIFO. All these results are plotted in the form of graphs to show the paths of these algorithms for the single state with an operation time of 5 minutes for each algorithm.

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“…Homogeneous schedulers are legacy scheduling algorithms. Such schedulers do not take into account the nature of channel errors or packet loss rates while deciding scheduling policies [3]. They usually serve as intra-class schedulers.…”

Section: Introductionmentioning

confidence: 99%

Proposed WiMAX Hybrid Scheduler with Split FTP Traffic and its Performance Evaluation

Yadav¹,

Vyavahare²,

Bansod³

2018

IJWMT

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The most promising broadband wireless access technology, Worldwide interoperability for Microwave Access (WiMAX), is the commercial name of IEEE 802.16. It is popular due to its middle range access mobile, high data rates, high scalability and convenient deployment. WiMAX provides Quality of Service (QoS) to various triple-play services (voice, video and data) through five service classes. QoS provisioning to various service classes in WiMAX is achieved by a scheduler at MAC layer. Selection of appropriate scheduler is based on certain design goals, such as attainment of QoS required for variety of applications, fairness to all services, reduced complexity etc. However, in general, File Transfer Protocol (FTP) traffic starves for bandwidth under the presence of high priority real-time traffic. This paper proposes a WiMAX hybrid scheduler that integrates homogeneous schedulers namely Weighted Fair Queuing (WFQ), strict priority and a Round Robin (RR). The unique feature of the proposed scheduler is that it has a splitter for FTP traffic with varying ratio and two stage priority schedulers for providing proper traffic load distribution for packet scheduling. The analytical modelling of proposed scheduler is achieved by Markov Chain and balance equations are solved to derive performance indicators such as mean queue length of packets, mean queuing delay, throughput and inter-class fairness for various triple-play services. The analytical results show that, as compared to recently reported hybrid WiMAX schedulers, proposed hybrid scheduler fulfils QoS requirements of various services and the splitting of FTP traffic has improved fairness among various services.

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Review of WiMAX Scheduling Algorithms and Their Classification

Cited by 7 publications

References 26 publications

IEEE 802.16 E&M SYSTEMS BANDWIDTH RESOURCE ALLOCATION PERFORMANCE INVESTIGATION

IEEE 802.16 E&M SYSTEMS BANDWIDTH RESOURCE ALLOCATION PERFORMANCE INVESTIGATION

Choosing the best quality of service algorithm using OPNET simulation

Proposed WiMAX Hybrid Scheduler with Split FTP Traffic and its Performance Evaluation

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