An enhanced channel-quality indication (CQI) reporting scheme for HSDPA systems

A major evolution of UMTS standard is the High Speed Downlink Packet Access (HSDPA). One of key techniques supporting HSDPA is the adaptive modulation and coding (AMC) in which the modulation scheme and the coding rate are adaptively changed 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 an enhanced CQI reporting scheme that can be used when a proportional fair scheduling algorithm (PFA) is used as a packet scheduling algorithm. The proposed scheme uses a dynamic threshold to filter off redundant CQI reports. With the proposed scheme, the battery capacity of UE can be conserved, maintaining the performance of traditional CQI reporting scheme.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2005-05
Language
ENG
Citation

IEEE COMMUNICATIONS LETTERS, v.9, no.5, pp.432 - 434

ISSN
1089-7798
DOI
10.1109/LCOMM.2005.05008
URI
http://hdl.handle.net/10203/231
Appears in Collection
EE-Journal Papers(저널논문)
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