Reducing Feedback Load of Opportunistic Multicast Scheduling over Wireless Systems

Author

Huang, Shiang-Ming ; Hwang, Jenq-Neng ; Chen, Yaw-Chung

Author_Institution

Dept. of Comput. Sci., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

14

Issue

12

fYear

2010

fDate

12/1/2010 12:00:00 AM

Firstpage

1179

Lastpage

1181

Abstract

Opportunistic multicast scheduling (OMS) requires the subscribers to feed back their instantaneous channel conditions frequently, and the feedback load increases linearly as the number of subscribers in the system increases. In this letter, we propose a Weakly Consistent OMS scheme for feedback reduction. The contribution of the proposed scheme is twofold: 1) feedback load is reduced while the multicast throughput performance remains comparable with the case of full feedback, and 2) no precise knowledge of the wireless fading channel is required. Performance evaluation through realistic WiMAX simulations shows that our proposed scheme can significantly reduce 65% of the feedback load while achieving 98% multicast throughput performance compared with the case of full feedback.

Keywords

WiMax; fading channels; multicast communication; scheduling; WiMAX; feedback load reduction; instantaneous channel; opportunistic multicast scheduling; wireless fading channel; wireless systems; Fading; Feedback; Load modeling; Multicast communication; Signal to noise ratio; WiMAX; Feedback reduction; opportunistic multicast scheduling (OMS);

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2010.12.101406

Filename

5610963