Data transmission scheduling considering short-term fading for transmit power reduction in CDMA systems

Author

Lee, Dong-Jun ; Cho, Dong-Ho

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea

Volume

51

Issue

6

fYear

2002

fDate

11/1/2002 12:00:00 AM

Firstpage

1621

Lastpage

1627

Abstract

A new data transmission scheduling scheme considering short-term fading conditions in the downlink of code-division multiple access (CDMA) systems is proposed. In this scheduling method, a mobile station (MS) connected to a base station (BS) estimates the fading condition of the next frame based on the received signal power variation and feeds back this information to the corresponding BS. The BS determines the MSs to which it transmits data based on the fading information from the MSs. Analytical and simulation results show that the proposed scheme saves the transmit power greatly when the speed of an MS is relatively low and the Rician factor is small. The maximum amount of the power reduction is about 9 dB. This reduced transmit power results in the data throughput increase of CDMA systems.

Keywords

cellular radio; code division multiple access; fading; scheduling; 9 dB; CDMA systems; Rician factor; base station; code-division multiple access; data throughput; data transmission scheduling; mobile station; received signal power variation; short-term fading; transmit power reduction; Base stations; Communication system traffic control; Data communication; Downlink; Fading; Fluctuations; Interference; Multiaccess communication; Telecommunication traffic; Throughput;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2002.802973

Filename

1175216