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VAMOS calculation

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  • #68862 Reply
    ahmed moa’ed

    kindly , Do you have new information about the VAMOS calculation

    #68863 Reply

    hi ahmed,
    what do you mean for “vamos calculation” ?
    calculation of available channels ?

    #68864 Reply
    ahmed moaed

    hi fede

    sure u know half rate which divide the time slot into to parts,the VAMOS technique divide the time slot into 4 part
    now ,i need to calculate the available TCH when we apply this technique and whats the side effect of it

    #68865 Reply

    Ok, you’re right, basically you can double the cs channels.
    The effect will be some additional interference, I suppose.
    But if someone has more experience about that, I am interested in his feedback too.

    #68866 Reply

    at most each ts can be divided in four, if HR + VAMOS is used.

    some users won’t be able to go on a VAMOS HR channel, due to too bad UL or DL quality. It’s like a kind of soft-congestion.

    I don’t know what is the typical ratio that can be applied, instead of x4. Perhaps x3…?

    Hand-on tests would be really useful 🙂

    #68867 Reply

    guys this is not an easy guess
    Tipically in average radio conditions you would get a 20/30% of increase in capacity. Because you need couples of of mobiles with similar radio conditions to be paired in te same hr channel. This situation is no always achieved so practically you are not going to double your voice capacity
    You will need new abis features and upgrade your BSCs with packet gateways

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