Fuzzy Q-Learning-based Hybrid ARQ for High Speed Downlink Packet Access

Chiao-Yin Huang, Wen-Ching Chung, Chung-Ju Chang, Fang-Ching Ren

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

In this paper, a fuzzy Q-learning-based hybrid automatic repeat request (FQL-HARQ) scheme is proposed to enhance the system performance of high speed downlink packet access (HSDPA) in universal mobile telecommunications system (UMTS). In the HSDPA system, it is an important issue to choose modulation and coding scheme (MCS) for new data packet when channel quality indicator (CQI) is inaccurate. Hence, the purpose of the FQL-HARQ scheme is to determine a suitable MCS for new data packet so as to maximize the system throughput while guarantee the block error rate (BLER) requirement. In the FQL-HARQ scheme, the fuzzy logic is used to choose a suitable MCS for each new data packet. According to the feedback information from the HSDPA system, the Q-learning algorithm is adopted to update fuzzy rule base. This makes the FQL-HARQ scheme can adapt to the variation of environment. Simulation results show that the proposed scheme can increase the system throughput of up to 70 % compared to the conventional adaptive method in the case with CQI report delay.
Original languageEnglish
Title of host publication2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4
PublisherIEEE
Pages1822-+
ISBN (Print)978-1-4244-2514-3
StatePublished - 2009
Event2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall - Anchorage, AK, United States
Duration: 20 Sep 200923 Sep 2009

Publication series

NameIEEE Vehicular Technology Conference Proceedings
PublisherIEEE
ISSN (Print)1550-2252

Conference

Conference2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall
CountryUnited States
CityAnchorage, AK
Period20/09/0923/09/09

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  • Cite this

    Huang, C-Y., Chung, W-C., Chang, C-J., & Ren, F-C. (2009). Fuzzy Q-Learning-based Hybrid ARQ for High Speed Downlink Packet Access. In 2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 (pp. 1822-+). (IEEE Vehicular Technology Conference Proceedings). IEEE.