Modified cross-layer scheduling for mobile WiMAX networks

El-Fishawy, Nawal; Zahra, Mohamed M.; Ebrahim, Mohamed; El-gamala, Mostafa

doi:10.1109/nrsc.2011.5873602

Cited by 4 publications

(5 citation statements)

References 4 publications

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“…The algorithm is executed at the BS at the beginning of every frame thereby priority is assigned to each SS. The cross layer algorithm proposed in (El-Fishawy et al, 2011) implies three drawbacks. The modified cross-layer scheduling algorithm improves those drawbacks in the following ways and efficiently manages the bandwidth allocation:…”

Section: Proposed Cross-layer Scheduling Algorithmmentioning

confidence: 99%

Comparison for Wimax Scheduling Algorithms and Proposal Quality of Service Improvement in Wimax Networks

Nandhini¹

2014

American Journal of Applied Sciences

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The objective of the broadband wireless technologies is to ensure the end to end Quality of Service (QoS) for service classes. Wimax is a revolution in wireless networks which could support real time multimedia services. In order to provide QoS support and efficient usage of system resources an intelligent scheduling algorithm is needed. The design of detailed scheduling algorithm is a major focus for researchers and service providers. In this study, a channel aware cross-layer scheduling algorithm for Wimax networks has been proposed. This scheme employs Signal to Noise Ratio (SNR) value which allocates bandwidth based on the information about the quality of the channel and service requirements of each connection. The proposed algorithm is described in detail and evaluated through series of simulation. The simulation results prove that the proposed algorithm reduces the packet loss rate and delay and thus improves throughput by 12.8%.

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Section: Proposed Cross-layer Scheduling Algorithmmentioning

confidence: 99%

Comparison for Wimax Scheduling Algorithms and Proposal Quality of Service Improvement in Wimax Networks

Nandhini¹

2014

American Journal of Applied Sciences

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“…The outstanding features of the mobile WiMAX are wide frequency range coverage, last-mile accessing, and increased QoS traffic supports for various types of applications, especially the multimedia applications [2][3]. It efficiently can serve the metropolitan area (e.g., WMAN) network with high-speed data rates and wide range signal coverage.…”

Section: Introductionmentioning

confidence: 99%

Efficient Resource Management for Uplink Scheduling in IEEE 802.16e Standard

Rahiman¹,

Ramadhan²,

Muhammed³

et al. 2017

Adv. sci. technol. eng. syst. j.

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“…The Worldwide Interoperability for Microwave Access (WiMAX) IEEE 802.16 standard is among the most promising and rising technologies. The salient features of this technology includes its large frequency range, last mile wireless access and increased Quality of Service (QoS) support for various types of applications [2,3]. It efficiently caters the metropolitan area (i.e Wireless Metropolitan Area Networks (WirelessMAN)) demands, with high speed data rate and coverage is up to several kilometers (kms).…”

Section: Introductionmentioning

confidence: 99%

“…Thus efficient scheduling design is left to the liberty of the designers. Thus, providing QoS subject to scheduling for IEEE 802.16 BWA system is a challenge for system developers [3]. A scheduling algorithm should take into account the heterogeneous WiMAX QoS classes and service requirements.…”

Section: Introductionmentioning

confidence: 99%

“…Scheduling algorithms are used to resolve contention for shared resources in a network. Therefore, it specifies and allocates bandwidth among the users and determines their transmission order to enable improved QoS in WiMAX networks [3,11,12]. Several paradigms of scheduling algorithms have been developed to address the evolving nature of WiMAX.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced uplink scheduling algorithm for efficient resource management in IEEE 802.16

Oad

Subramaniam

Zukarnain

2015

J Wireless Com Network

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Worldwide interoperability for Microwave Access (WiMAX) is based on the IEEE 802.16 standard. This technology provides broadband wireless last-mile access in a Metropolitan Area Network (MAN). The IEEE 802.16-2004 standard (i.e. Fixed WiMAX) provides specification for the Medium Access Control (MAC) and Physical (PHY) layers for WiMAX. A critical part of the MAC layer specification is scheduling, which resolves contention for bandwidth and determines the transmission order of users. The algorithms are researched under different mixes of traffic and for various characteristics of the IEEE 802.16 MAC layer. In this research the focus is on the WiMAX uplink traffic scheduling. A scheduling algorithm's task in a multi-class network is also to categorize the users into one of the pre-defined classes. In this research, the algorithms are tailored at enhancing the collective performance of hybrid algorithms in the WiMAX domains which complement the assigned priorities. The spectrum of constraints which have been extracted from the hybrid Earliest Deadline First(EDF) + Weighted Fair Queuing (WFQ) + First in First out (FIFO) EDF+WFQ+FIFO algorithm include the static nature by which priorities are assigned and maintained during the entire duration of a transmission time and the core attributes of absolute dependence on deadline. The second constraint is embedded within the EDF scheduling algorithm and the perseverance of pursuing deadline associated weightages. In this research, the reengineering of the scheduling mechanics governing the EDF algorithms has been pursued. The dominance of the pre-stipulated deadline of the EDF algorithm is indeed acknowledged in the proposed and developed enhanced algorithm. The simulation results indicate that the legacy algorithms are not suitable for the multi-class traffic systems of WiMAX. This is because these algorithms do not explicitly incorporate the WiMAX QoS parameters into their mechanisms and are highly static. Extensive discrete -event simulation experiments have been done for the purpose of performance analysis. The performance metrics used are average throughput, average delay, missed deadline ratio and average queue size utilization ratio. The acquired results have proven that the proposed algorithms have successfully enhanced the static constrained algorithm.

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Modified cross-layer scheduling for mobile WiMAX networks

Cited by 4 publications

References 4 publications

Comparison for Wimax Scheduling Algorithms and Proposal Quality of Service Improvement in Wimax Networks

Comparison for Wimax Scheduling Algorithms and Proposal Quality of Service Improvement in Wimax Networks

Efficient Resource Management for Uplink Scheduling in IEEE 802.16e Standard

Enhanced uplink scheduling algorithm for efficient resource management in IEEE 802.16

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