Channel adaptive CQI reporting schemes for HSDPA systems

Author

Jeon, Soo-Yong ; Cho, Dong-Ho

Author_Institution

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

Volume

10

Issue

6

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

459

Lastpage

461

Abstract

HSDPA (high-speed downlink packet access) is an evolved UMTS packet scheme that delivers increased user peak data rates and quality of service. A key technique supporting HSDPA is adaptive modulation and coding (AMC), in which the modulation scheme and the coding rate are changed adaptively according to the downlink channel quality reported by the user equipment (UE). Therefore, the channel quality indication (CQI) reporting scheme is directly related to the accuracy of AMC and the performance of HSDPA. This letter proposes channel adaptive CQI reporting schemes in which UEs report the CQI value intelligently by using information about channel quality. With the proposed schemes, the battery capacity of UE can be conserved and the uplink interference can be lowered by filtering off redundant CQI reports or the transmission error rate can be lowered by fast CQI reports

Keywords

3G mobile communication; adaptive codes; adaptive modulation; channel capacity; modulation coding; packet radio networks; quality of service; radio access networks; radio links; radiofrequency interference; AMC; HSDPA; UMTS packet scheme; adaptive modulation-coding; changed adaptive CQI reporting scheme; channel capacity; channel quality indication; filtering; high-speed downlink packet access; quality of service; universal mobile telecommunication system; uplink interference; 3G mobile communication; Batteries; Downlink; Error analysis; Filtering; Interference; Modulation coding; Multiaccess communication; Prediction methods; Quality of service;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2006.1638615

Filename

1638615