Performance comparison of stall avoidance mechanisms for high speed downlink packet access in the WCDMA system

Li-Chun Wang*, Chih Wen Chang, Han Kuang Chang, Chin Yang Hsieh, Sam Jiang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper. we investigate stall avoidance mechanisms for the W-CDMA system with high speed downlink packet access (HSDPA). The stall avoidance mechanisms are aimed to reduce transmission delays and keep in-sequence delivery of MAC layer data to the upper layer. By analysis and simulation. we compare three stall avoidance mechanisms, including the timer-based, the window-based. and the indicator-based methods. For comparison, we introduce a new performance metric called the gap processing time. Our results show that for Eb/N0 equal to 7 dB in the AWGN channel, the average gap processing time for the indicator-based method is 8.49 transmission time intervals (TTIs) and those for the window-based method and the timer-based method are 36.38 TTIs and 175.5 TTIs, respectively. In a Rayleigh fading channel, we find that the gap processing time of the window-based and the indicator-based methods are higher than in the AWGN channel, while the timer-based method has the same gap processing time in both the AWGN channel and the Rayleigh fading channel.

Original languageEnglish
Title of host publicationPIMRC2003 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, Proceedings
Pages2431-2436
Number of pages6
DOIs
StatePublished - 1 Dec 2003
Event14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003 - Beijing, China
Duration: 7 Sep 200310 Sep 2003

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Volume3

Conference

Conference14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003
CountryChina
CityBeijing
Period7/09/0310/09/03

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