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Pardus
Joined: 03 Jul 2006
Posts: 1
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 03 Jul 2006 13:59 Is HARQ actually used? |
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| tags: harq in mobile wimax |
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I've read in the mobile WiMax technical overview (WiMax Forum) Hybrid ARQ is supported.
I've also seen on Wikipidia HSDPA/HSUPA (extends WCDMA) should use incremental redundancy HARQ.
What I'd like to know is whether HARQ is used somewhere else today (not just included as an option in the standard) or will be be used in the forseeable future.
Or if the technology is just too complex and therefore too expensive to see much use?
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joinfaisal
Joined: 28 Mar 2005
Posts: 45
Helped: 1
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| 06 Jul 2006 21:55 Is HARQ actually used? |
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| it could be optional in wimax, but HSD/UPA use HARQ scheme as mandatory feature, because this is one of the feature which must be supported for fast round trip time of packets. I dont know whether it used other than these techs.
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janath
Joined: 21 May 2006
Posts: 33
Helped: 4
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| 07 Jul 2006 2:34 Re: Is HARQ actually used? |
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| tags: harq in mobile wimax |
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| Pardus wrote: |
I've read in the mobile WiMax technical overview (WiMax Forum) Hybrid ARQ is supported.
I've also seen on Wikipidia HSDPA/HSUPA (extends WCDMA) should use incremental redundancy HARQ.
What I'd like to know is whether HARQ is used somewhere else today (not just included as an option in the standard) or will be be used in the forseeable future.
Or if the technology is just too complex and therefore too expensive to see much use? |
In HSDPA HARQ is practically used. There are two types of schmes. Incremental redundancy and chase combining. Chase is use to do the combining maximum likelihood manner
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