Throughput of hybrid ARQ types for UTRA TDD

Peter Slanina, Fariba Raji, Christoph Mecklenbräuker, Christian Hölzl, Gerald Ostermayer, Thomas Stadler, Enric Mitjana

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


The throughput of Hybrid ARQ Types I and II-III based on simulations for Unconstrained Delay Data (UDD) is investigated. We focus on the differences between Types I and II in this contribution. A subset of the protocol on Layers 1 - 3 for UMTS Terrestrial Radio Access (UTRA) Time Division Duplex (TDD) mode is simulated for a single cell. Both user traffic and signalling messages suffer from fading and interference in the model. Interference due to traffic in neighbouring cells is also taken into account. Results are obtained for downlink traffic for various code-rates and interleaving schemes. The results include capacity, distribution of the number of retransmissions, and PDU Delay. It is shown that Type II - III greatly outperforms Type I for the cases "UDD 2048 Pico" and "UDD 384 Micro" in terms of capacity and the number of retransmissions. The benefit of using Type II-III decreases at lower bitrates but it remains significant. This is shown by a simulation for the case "UDD 8 Micro". Thus Hybrid ARQ Type II-III outperforms Type I for all UDD services between 8kb/s and 2Mb/s for UTRA TDD mode.

Original languageEnglish
Title of host publicationWCC 2000 - ICCT 2000
Subtitle of host publication2000 International Conference on Communication Technology, Proceedings - 16th World Computer Congress 2000
EditorsKe Gong, Ke Gong, Ke Gong, Zhisheng Niu, Zhisheng Niu, Zhisheng Niu
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)0780363949, 0780363949, 0780363949
Publication statusPublished - 2000
EventInternational Conference on Communication Technology, ICCT 2000 - Beijing, China
Duration: 21 Aug 200025 Aug 2000

Publication series

NameInternational Conference on Communication Technology Proceedings, ICCT


ConferenceInternational Conference on Communication Technology, ICCT 2000


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