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Expired Canadian patentCanada

Method and apparatus implementing retransmission in a communication system providing h-arq

CA 2457230 C · Owner: Oestman, Kjell · Inventors: Oestman, Kjell

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An apparatus and corresponding method (Fig. 4) for responding to a repeat request in a wireless communication system in which packets are communicated according to a modulation and coding scheme with one or more packets provided , in a frame communicated during a transmission time interval the method , including the steps of: if a repeat request is received then ordering in a , second order the bits of the packets associated with the repeat request and , repeating the steps up to and including retransmitting the packets associated with the repeat request; wherein the second order the symbols constituting , the modulation are generated differently than in the original transmission.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed August 14, 2002 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 2024.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 14, 2002
GrantedJuly 10, 2012
Term endedAugust 14, 2022
Patent numberCA 2457230 C
Classification (IPC)H04B7/21 +2 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedAug 14, 2002Patent grantedJuly 10, 2012Term endedAug 14, 2022

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.