A performance study of scheduling algorithms in Point-to-Multipoint WiMAX networks

Dhrona, P.; Ali, Najah Abu; Hassanein, Hossam S.

doi:10.1109/lcn.2008.4664291

Cited by 33 publications

(50 citation statements)

References 14 publications

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“…The QoS requirements for each class are usually mapped into a certain bandwidth allocation depending on the class specifications [18]. There are five levels of QoS at MAC level: [19] [20].…”

Section: Call Admission Controlmentioning

confidence: 99%

“…Many of these algorithms were proposed mainly for wired networks. However, they are used in WiMAX networks to satisfy the requirements of the five class services (UGS, ertPS, rtPS, nrtPS, and BE) [18] [3] [14] [15]. The following subsections will discuss eight different homogenous scheduling algorithms.…”

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

“…At the beginning of any request slot, the scheduler checks to see which customer is next to serve. The SSs of the rtPS class are given the higher weights compared to the weight assigned to SSs of the nrtPS and BE classes [17] [22] [18]. The weight of each queue is determined by the average size of the packets in each queue, the minimum reserved traffic rate for those packets and the maximum sustained traffic rate [18] [24].…”

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

“…The scheduler allocates bandwidth to all SSs and assigns deadlines to each packet based on maximum delay requirements. The drawback of this scheduler is that starvation can potentially occur to SSs with lower class of service since they do not have delay requirements [18] [25] [26] [27].…”

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

“…WFQ sorts the packets in an increasing order according of its finish time which is computed depending on the size and weight assigned to the packets of the SSs. The main disadvantage of WFQ is that it does not take the start time of the packets [18] [24].…”

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

See 4 more Smart Citations

Modified WRR Scheduling Algorithm for WiMAX Networks

Mardini

Alfool²

2011

NPA

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Worldwide Interoperability for Microwave Access (WiMAX), which is also known as IEEE 802.16 standard, supports last-mile broadband access wireless networks. WiMAX has many advantages including wide coverage area and high bandwidth. These advantages enable WiMAX to support long transmission range and high data rate compared to cellular and WiFi network. WiMAX technology uses a number of scheduling techniques in the Medium Access Control layer, which is responsible for the utilization of available resources in the networks and distribute them among users in order to ensure the desired quality of service. In this study, we propose a Modified Weighted Round Robin (MWRR) scheduler in order to decrease the average end-to-end delay and improve the average throughput. The proposed scheduling technique has been designed and simulated using the QualNet 5.0.2 network simulator. In order to evaluate the performance of our proposed approach, we compared our results to the results of well-known scheduling techniques (Weighted Round Robin, Strict Priority, and Weighted Fair Queuing). The average percentage of improvement was around 4%.

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Section: Call Admission Controlmentioning

confidence: 99%

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

Section: ) Homogeneous Scheduling Algorithmsmentioning

confidence: 99%

See 3 more Smart Citations

Modified WRR Scheduling Algorithm for WiMAX Networks

Mardini

Alfool²

2011

NPA

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Cross‐Layer End‐to‐End QoS Architecture: The Milestone of WiMAX

Rango

Malfitano

Marano

2010

WiMAX Security and Quality of Service

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Adaptive packet scheduling for the uplink traffic in IEEE 802.16e networks

Teixeira

Guardieiro

2012

Int J Communication

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SUMMARYIEEE 802.16e is a telecommunication standard technology designed to support a wide variety of multimedia applications. It defines five service classes, each one with its respective QoS requirements, but does not define the scheduling algorithm for these service classes. In this paper, an adaptive packet scheduling algorithm for the uplink traffic in IEEE 802.16e networks is proposed. This algorithm is designed to be completely dynamic, mainly in networks that use various modulation and coding schemes (MCSs). The algorithm is applied directly to the bandwidth request queues in the base station (BS) and aims at supporting the real‐time and non‐real‐time applications. Using a cross‐layer approach and the states of the bandwidth request queues in the BS, a new deadlines based scheme was defined, aiming at limiting the maximum delay to the real‐time applications. Moreover, this algorithm interacts with the polling management mechanisms of the BS and controls the periodicity of sending unicast polling to the real‐time and non‐real‐time service connections, in accordance with the QoS requirements of the applications. The proposed algorithm was evaluated by means of modeling and simulation in environments where various MCSs were used and also in environments where only one type of modulation was used. The simulations showed satisfactory results in both environments. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

A performance study of scheduling algorithms in Point-to-Multipoint WiMAX networks

Cited by 33 publications

References 14 publications

Modified WRR Scheduling Algorithm for WiMAX Networks

Modified WRR Scheduling Algorithm for WiMAX Networks

Cross‐Layer End‐to‐End QoS Architecture: The Milestone of WiMAX

Adaptive packet scheduling for the uplink traffic in IEEE 802.16e networks

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