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estimating call setup time

Viewing 6 posts - 1 through 6 (of 6 total)
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  • #49855

    Hi everybody,
    Is there a way of estimating the average call setup time in a network? What method, formula and assumptions are considered?
    Thank you very much


    it’s rather hard to find BSS counters that shows the call setup time. You can see the average duration of the SDCCH seizure, but this takes into acount the SMS duration, Location Upd duration, IMSI attach duration and call setup duration altogether.

    The best way is to perform Abis Traces or Drive Tests, so you know exactly what is the duration of call setups for the few calls you’ve traced.



    conduct a drive test…if you are using TEMS then it ll tell you the call setup time each time you make a call (see the event window).
    you can export the tems logfile and open it in excel…(export only the events). in exel you can find the average setup time 😉

    do share if there is better procedure for that in your knowledge


    Thank you so much for all your contributions. In fact i am aware of the call setup time in TEMS. I checked it occasionally but given the wide variation in values, it means we might need numerous values to zero in on a good average. This might make this method a bit tedious. Hey Pix, how do you perform the abis traces? Using what tool?

    Gito Prastomo

    Hi Yayra,

    You could estimate the CST by drivetest and calculate the CST from L3 messages. For GSM network, CST is the duration from Channel Request until Alerting, for Mobile to Mobile Calls usually 7-8 s, For WCDMA, CST is the duration from RRC Connection Request until Alerting, for MMC usually 6 – 7 s

    nabireeba james

    what could be the difference between a call set up for mobile to mobile at a far distance (many bss and different sides of msc) to mobiles that are in same bss?

Viewing 6 posts - 1 through 6 (of 6 total)
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