Multi-user Fair Scheduling in the Downlink of CDMA Packet Systems

Author

Kim, Sangbum ; Hong, Daehyoung

Author_Institution

Dept. of Electron. Eng., Sogang Univ., Seoul

Volume

11

Issue

3

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

228

Lastpage

230

Abstract

A fair scheduling algorithm is proposed to improve the system throughput while maintaining the fairness in the downlink of a code-division multiple access (CDMA) system employing AMC and multicodes. R. Kwan and C. Leung suggested an optimal scheduling to maximize the total throughput based on simultaneous transmissions strategy. In this letter, we extend the optimal scheduling so that some degree of fairness can be maintained. We formulate a mixed-integer nonlinear programming problem to assign the radio resources such as the transmit power and codes to several users effectively. The result shows that the proposed algorithm provides a significant throughput gain over PF scheduling with one-by-one transmission at the same level of fairness

Keywords

code division multiple access; nonlinear programming; packet radio networks; resource allocation; scheduling; AMC; CDMA packet system downlink; adaptive modulation-coding; code-division multiple access; mixed-integer nonlinear programming; multicodes; multiuser fair scheduling algorithm; radio resource assignment; Adaptive scheduling; Base stations; Data communication; Downlink; Multiaccess communication; Optimal scheduling; Resource management; Scheduling algorithm; Throughput; Web and internet services;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2007.061703

Filename

4133905