Wireless Personal Communications

, Volume 42, Issue 3, pp 337–353 | Cite as

Performance Analysis of Hybrid-ARQ Characteristics in HSDPA

  • Irene de BruinEmail author
  • Frank Brouwer
  • Neill Whillans
  • Yusun Fu
  • Youqian Xiao


This paper describes network level simulation results for Enhanced UMTS. High-Speed Downlink Packet Access (HSDPA) enhances both the capacity and the peak rate of WCDMA-based systems. Link adaptation and Hybrid-Automatic Repeat reQuest (H-ARQ) are two key functions creating these enhancements. This paper considers the results of different aspects of the H-ARQ process. This process is considered from two viewpoints. The results are mainly gathered from the ns-2 based network level simulator Enhanced UMTS Radio Access Networks Extension (EURANE). This is a network level simulator with realistic traffic and user scenarios. Also results from a more fundamental analysis of H-ARQ characteristics based on link-level results will be included. In this more fundamental point of view, only the underlying channel conditions are used for a preliminary study of new ideas. The rounding down and delaying of the CQI reporting both have a significant impact on throughput and transfer delay of the HSDPA channel. The analysis of the link-level results provides a first insight how different parts of the WCDMA system interact with each other and impact the end-to-end performance as experienced by the user. Both viewpoints show that the H-ARQ functionality indeed enhances the capacity and peak rate of the WCDMA system.


HSDPA link adaptation network-level simulation ns-2 performance analysis 


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Copyright information

© Springer 2006

Authors and Affiliations

  • Irene de Bruin
    • 1
    Email author
  • Frank Brouwer
    • 1
  • Neill Whillans
    • 1
  • Yusun Fu
    • 2
  • Youqian Xiao
    • 2
  1. 1.Twente Institute for Wireless and Mobile CommunicationsEnschedeThe Netherlands
  2. 2.Huawei Technologies Co., LtdShanghaiChina

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