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Channel Aware Uplink Scheduler for a Mobile Subscriber Station of IEEE 802.16e

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International Journal of Computer Applications
© 2011 by IJCA Journal
Volume 35 - Number 6
Year of Publication: 2011
Authors:
Sandhya Kulkarni
Shwetha D.
Devaraju J. T.
D. Das
10.5120/4404-6115

Sandhya Kulkarni, Shwetha D., Devaraju J T. and D Das. Article: Channel Aware Uplink Scheduler for a Mobile Subscriber Station of IEEE 802.16e. International Journal of Computer Applications 35(6):15-22, December 2011. Full text available. BibTeX

@article{key:article,
	author = {Sandhya Kulkarni and Shwetha D. and Devaraju J. T. and D. Das},
	title = {Article: Channel Aware Uplink Scheduler for a Mobile Subscriber Station of IEEE 802.16e},
	journal = {International Journal of Computer Applications},
	year = {2011},
	volume = {35},
	number = {6},
	pages = {15-22},
	month = {December},
	note = {Full text available}
}

Abstract

The scheduling part of the IEEE 802.16 (WiMAX) standards is kept as an open issue to provide differentiation among equipment manufacturers and operators. The uplink scheduling is very significant and more complex compared to downlink scheduling. Uplink scheduling is divided into two parts; one is scheduling the resources among many users from a base station (BS) and the other is sharing the resources among its services in a single user. BS uplink scheduling has been given more attention compared to subscriber station (SS) uplink scheduling. SS scheduler plays a significant role in providing the quality of service (QoS) among its services. The channel status awareness is vital in designing the SS scheduler as the channel conditions vary for a mobile user. This work proposes a scheduling algorithm for SS, which utilizes the channel information and queue length variation for the reallocation of received aggregated bandwidth grant to optimize the QoS parameters. The performance of the proposed algorithm is studied by conducting simulations using QualNet 5.0.2 simulation tool. Simulation results demonstrate the effectiveness of the proposed algorithm to improve the QoS.

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