WLC35-5: User-Aided Adaptive TDMA for Real-Time Services in an OFDM Based Cellular System

Author

Huo, Changqin ; Sesay, Abu B. ; Fapojuwo, Abraham O.

Author_Institution

TRLabs, Univ. of Calgary, Calgary, AB

fYear

2006

fDate

Nov. 27 2006-Dec. 1 2006

Firstpage

1

Lastpage

5

Abstract

In this paper, a user-aided adaptive TDMA (UAAT) algorithm is developed for real-time services to improve the system efficiency of OFDM based cellular networks. In the UAAT scheme, a subchannel is shared by multiple users adaptively in a TDMA manner based on their instantaneous channel conditions. The system efficiency is improved dramatically by applying adaptive modulation schemes to all real-time users and using each subchannel more efficiently. The performance of the proposed algorithm is evaluated and compared with that of other resource allocation schemes. Results show that the proposed algorithm provides up to 100% improvement in the system efficiency or, equivalently, the user capacity of OFDM based cellular networks.

Keywords

OFDM modulation; adaptive modulation; cellular radio; multiuser channels; time division multiple access; wireless channels; OFDM based cellular network system; UAAT algorithm; adaptive modulation; instantaneous channel condition; multiple user channel; real-time service; user-aided adaptive TDMA; Cellular networks; Data communication; Diversity methods; Land mobile radio cellular systems; OFDM modulation; Radio spectrum management; Real time systems; Resource management; Time division multiple access; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE

Conference_Location

San Francisco, CA

ISSN

1930-529X

Print_ISBN

1-4244-0356-1

Electronic_ISBN

1930-529X

Type

conf

DOI

10.1109/GLOCOM.2006.821

Filename

4151451