- This topic has 15 replies, 1 voice, and was last updated 12 years, 2 months ago by Mahesh.
31st January 1999 at 12:27 #32328Annchoon PanGuest
I need to calculate the trunks capacity/allocation from the BSC to the MSC base on the BTS traffic capacity. I also need to know how the traffic from the BTS is groomed and transported to the MSC.
Pls give me your advise or direct me to any useful web site.
my e-mail address: firstname.lastname@example.org May 2000 at 16:01 #32329BillGuest
We have establish a SOA network in the Northeast. What are you using for your trunking controllers? Are you using your repeaters for Voice only , data only or a combination of bot?18th September 2008 at 17:12 #32330kkGuest
please i’ll like to know the maximum traffic a bts can carry.
contact me on email@example.com September 2008 at 17:36 #32331pixGuest
it depends on the number of TRX in the BTS.
an alcatel lucent bts can fit 24 TRX, therefore it can carry up to 168 calls at once in full rate, and 336 calls in half rate. I’ve never tried that myself though 🙂
in terms of erlang, that’s about 150 erlangs FR, or 300 erlangs HR.23rd September 2008 at 08:21 #32332kkGuest
does anyone have an idea on the mathematical relation between the offered traffic and the carried. pls let me know or you can direct me to websiste23rd September 2008 at 09:40 #32333pixGuest
the formula is quite complex.24th September 2008 at 07:36 #32334RHGuest
Carried Traffic = Offered Traffic*(1-Grade of Service)
Where Grade of Service refers to the Probability of Blocking.24th September 2008 at 11:41 #32335MaheshGuest
hello,i want to know at which position in the Syn burst BISIC is present??& why??can somone help me24th September 2008 at 12:45 #32336pixGuest
in gsm, the sync burst does not contain the BSIC.
RH > good one 🙂 i misunderstood the question (misread, actually)25th September 2008 at 05:11 #32337MaheshGuest
Hello pix,thanx a lot for ur reply,actually i am new in gsm ,could u pls explain me this.25th September 2008 at 07:56 #32338pixGuest
the BSIC is transmitted in BCCH blocks, not in the SCH blocks.
the SCH contains only a “beacon” signal so that mobiles can re-synchronize with the BCCH frequency.
If you’re new to GSM, you should just google “GSM tutorial” or “GSM explanation”, because it’s a rather vast topic.
pix25th September 2008 at 12:26 #32339fedemGuest
sorry but I dont agree.
According to spec 45.002 par. 220.127.116.11.1,
the BSIC is encoded in the SCH.
Federico26th September 2008 at 12:42 #32340pixGuest
yes, sorry for the mistake and thx for correcting.
what a coincidence, i’m just reading this chapter too 🙂1st October 2008 at 09:39 #32341MaheshGuest
coud u give me idea about the exact position of bisic in sch1st October 2008 at 10:00 #32342pixGuest
for this kind of question, you should download these documents:
44.006 and 44.018 specify the precise bit ordering
45.002, chapter 18.104.22.168.1 Synchronization channel (SCH) description
45.003 the channel coding of the SCH
45.010 defines how the TDMA frame number can be calculated from T1, T2, and T3′
i’m sorry, i don’t know the details for those channels because it’s totally useless for optimization 🙂
have fun 🙂