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Re: [Question #116322]: processing time for rohc

 

Question #116322 on rohc changed:
https://answers.launchpad.net/rohc/+question/116322

    Status: Open => Answered

Cedric Baudoin proposed the following answer:
Hi,

The delay is somehow related to the link layer technologies. Let me explain
: if you consider a satellite access, using ATM at layer 2, your VoIP
packets will be segmented into 2 ATM cells. These kinds of access control
the bandwidth using a radio ressource management protocol based on requests
emitted by the terminals and a Network control center that collects the
requests and calculate the MF-TDMA allocation plan used by the terminal to
emit their layer 2 packets. With this scheme, the 2 cells can be emitted
separetly (i.e. on different frames) leading to an increased delay. Now,
using ROHC you will be able to have only 1 cell to transport your VoIP
pakct, leading to a reduction of the delay at layer 2

Best regards

Cédric


2010/7/1 Imad J. Mohamad <question116322@xxxxxxxxxxxxxxxxxxxxx>

> New question #116322 on rohc:
> https://answers.launchpad.net/rohc/+question/116322
>
> I'm sorry if my question not relevant. I'm looking for information and
> found your forum is specialist.
> Any link or reference i can read to find such information.
>
> RoHC Implementation is marked in utilizing the bandwidth and improved the
> delay.I wand to understand and analyze the delay.
>
> let end to end delay for VoIP = processing delay + propagation delay +
> queuing delay + transmission delay
> Please In terms of processing delay and queuing delay. My i ask
>
> 1- How much RoHC adds processing delay or overhead (for VoIP for example)
> to the compressor node (router) and to decompress-or node (router) as a
> ratio for each served packet..
>
> 2- How much RoHC reduced the queuing delay (as a ratio) in the compressor
> node and to decompress-or node.
>
> I'm sorry if my question is not relevant to fourm interest. I'm looking for
> information and found your forum is specialist.
> Any link or reference i can read to find such information.
>
> Thank you in advance
> Imad
>
>
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