- This topic has 156 replies, 1 voice, and was last updated 12 years, 10 months ago by Gurjinder.
8th November 2006 at 06:45 #34505AyatGuest
i tried to claculate the benefit for BSC traffic in Busy hour
so if i have one cell and this cell has traffic in Bh = 9.05 Erl
covert traffic to min
9.05*60 = Min.
the the result by Min. * Cost of one minute
is it right ??????8th November 2006 at 15:40 #34506pixGuest
yes, to me, this is correct.
Be sure to use the TCH erlang, and not the SDCCH + TCH.
and then, you must know that during the TCH phase, there are few seconds during which the call is being connected and during which there is ringing. This delay is included in the TCH erlang, but is not being paid by the subscriber.
Therefore, I would remove 5% of the total erlang value. (9.05 – 5%)
(average call duration = 60 seconds, average waiting duration = 3 seconds)
I hope i’m being clear and logic 🙂
regards9th November 2006 at 11:04 #34507DeyindeGuest
Can u help me with TCP/ip security implementation12th November 2006 at 08:35 #34508ayatGuest
i understand your answer , i think it is logic , but do you think the traffic of ringing and call setup is high to effected on calculation ?????/
thanks so much12th November 2006 at 09:08 #34509ayatGuest
dear , pix
could you tell me from where we find 5%
traffic *69 min
60 min not second
5% * 60 = 3 minute
i think it is so much .
thanks13th November 2006 at 02:16 #34510pixGuest
well, you have to consider the average duration of one call, not the erlang traffic on the whole cell !
To find the value, it is easy : erlang divided by number of TCH assignments (for normal assignments + for incoming handovers), and multiply the result by 3600.
But usually you can consider that the average is about 60 seconds… it is a value that you find frequently worldwide.
And usually, you wait an average of 3 seconds before your call is being answered (or before you answer the incoming call).
That is where the 5% come from. You can decide or not to take it into account, but if you want a realistic simulation, you’d better throw it in..
If the cumulated duration of the calls in a cell = 60 minutes (for example), the cumulated duration of the “waiting”/”ringing” phase is about 3 minutes. But that duration is split over the whole amount of calls that were processed in the cell.
Pix15th November 2006 at 05:46 #34511maryamGuest
Hi all, i need to know why is the TSC equal to BCC in GSM spec, any comment??15th November 2006 at 06:22 #34512PixGuest
actually, it is recommended to be equal, but not mandatory… a cell can work fine with a TSC different than the BCC.
don’t ask me why, cuz i’ve no idea what the TSC is actually doing… (used during the HO ACCESS ?)16th November 2006 at 15:43 #34513MaryamGuest
Hi, yes, it is used to estimate the distance between MS and BTS, so that Bursts and TA are set accurately, where you think I can get the answer to why they should be same, i asked so many but none knew why20th November 2006 at 09:58 #34514bodoruddozaGuest
Why we use DC voltage in telecom sector?
In case of DC, why we use 48 V, not any other voltage?
Could u plz. answer me ?23rd November 2006 at 13:37 #34515ayatGuest
i have a question
Plz could you help me about if there is a KPI or counter called call per TCH channel , traffic per channel ,and TCH channel per subscriber , is there what is the benefit for each one
that is means
Is it is a design counter , or quailty counter?
thanks23rd November 2006 at 14:06 #34516ayatGuest
Plz i repeat my question plz could you help me to do my job ?
my job is how to calculate BSC traffic revenue for certain company ?
i tried with help from Mr. pix
but i found the result (revenue so huge and i am sure the revenue for this company it is not as the result
my claculation way is
generated traffic in BH (Busy hour *60 * cost of one minute
one cell has 2 TRX , 12 TCH
and it generated 10 ERL in BH
i converted TCH traffic to minute by multiply *60
Plz help me26th November 2006 at 10:16 #34517bodoruddozaGuest
why 48V DC is used in telecom, why not other voltabe?
I mean, what is the point of selecting the special voltage, not other voltage?
why DC, not AC voltage is used?
Could u plz. answer me?27th November 2006 at 05:55 #34518bodoruddozaGuest
Could u pls. tell me from which the control channel BCCH and SDCCH are generated, whether from BTS or from BSC?30th November 2006 at 14:12 #34519PraveenGuest
I have very less idea of Nokia BSC give me idea such that i could feel confident and tell me various functions,commands and how many part it is consisting
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