Channel Quality Indication Reporting Schemes for UTRAN Long Term Evolution Downlink

In this paper we evaluate the performance of channel quality indicator (CQI) reporting schemes in 3GPP UTRAN long term evolution (LTE) downlink (DL). In LTE, time and frequency dependent CQI is needed for DL packet scheduling (PS) and fast link adaptation (LA). Studies have indicated that frequency...

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Bibliographic Details
Published inVTC Spring 2008 - IEEE Vehicular Technology Conference pp. 2522 - 2526
Main Authors Kolehmainen, N., Puttonen, J., Kela, P., Ristaniemi, T., Henttonen, T., Moisio, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2008
Subjects
Downlink
Feedback
Frequency dependence
Frequency domain analysis
Long Term Evolution
Performance analysis
Performance gain
Scheduling algorithm
Signal analysis
Throughput
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Summary:In this paper we evaluate the performance of channel quality indicator (CQI) reporting schemes in 3GPP UTRAN long term evolution (LTE) downlink (DL). In LTE, time and frequency dependent CQI is needed for DL packet scheduling (PS) and fast link adaptation (LA). Studies have indicated that frequency domain PS (FD-PS) and LA are essential techniques in improving the LTE performance, giving e.g. both cell throughput and coverage gain of around 40 % over a distributed multiplexing scheme. However, there is a tradeoff with signaling overhead related to the CQI feedback and overall LA and PS performance, which is rather overlooked in the literature. We analyze four different CQI reporting schemes with respect to system spectral efficiency and conclude that the best-M average and threshold based CQI reporting schemes seem to be the most promising in terms of the compromise between system performance and signaling overhead.
ISBN:1424416442
9781424416448
ISSN:1550-2252
DOI:10.1109/VETECS.2008.555