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can anyone please tell me how to improve Minutes per Drop MPD in NOkia BSC..!!
dears
we r lossing traffic after increasing the capacity in BTS-6000 family. (BTS-6102) do u have experience in this regard??
How many erlangs in one TRX
how many channels can one TRX carry?
pls clerify if any one has the khowledge about it.and in how many time slots will one channel be broken?I need to know how many Erlang 1 TRX can carry at full rate. I am not a telecom enginner and my understanding is limited. But I believe the Erlang carried by a TRX can increase if one applies half rate in an percentage. I need to know what the Erlang a TRX can carry at full rate.
Thanks for the help!! Cheers..
hi,
One cell can be configured with 1 to 12 TRX (usually).
The more TRX you put in one cell, the higher the capacity (it’s non-linear)
With only one TRX, you can have max 7 channels for voice.
Go there :
http://www.erlang.com/calculator/erlb/Select BHT as “unknown”
Blocking = 0.02(= 2%)
Lines = 7 (7 channels)click on Calc.
capacity of 1 TRX = 2.9erlangs (full rate)In halfrate, you can have 14 channels –> 8.2 erlangs.
The capacity in erlangs depends on the acceptable blocking rate. By default 2%. Most operators today are choosing lower blocking (1% or 0.05%).
Regards
pixHello everyone. Please I need to know how to calculate the maximum number of TRX that can be configured in a cell. Given that the TCH will use 1*3 frequency reside for arfcn of 45 -80, while BCCH use 81-94. Bandwidth is 10Mhz.
Thank you.hello,
with 35 ARFCN for the TRX TCH, and a RF Load of 30% on a 1×3 pattern.
–> 35/3 = 11.6666 arfcn MA-LIST per sector (let’s round up to 11, so you can keep “joker frfequencies”.)
30%*11 = 3.3 TRX ‘TCH’ / SECTOR
so basically, you can easily have 1+3 TRX per sector (1 bcch + 3 tch), with good radio quality.
By pushing radio quality and taking into account a traffic < 100% capacity at busy hour, I think you are safe to push the capacity to 1+4 TRX per Sector. That's a radio load of 36% which is still very acceptable. Maybe you'll see some qos degradation @ the busy hour. In such case, do some downtilting to reduce overlaps, and increase HR usage. regards, pix
Hi Pix,I Thank u for your reply. Please I still need further clarifications because am fresh in RF planning.
How do i calculate the RF load for each reuse pattern?
ThanksHumyoon khan
In one E1 there is 16 trx hop u know that
and in 1 trx there id 8 chaneels in 8 channels there are 2 chanells for TX and RX remaing ^ chanell for userA Trx have 8 timeslots and 1 timeslot for 1 user
1-Trx = 8 Timeslots
1-Timeslot = 1 userWHAT IS dual Half rate & capacity in er-lang.
what is LLC Throughput & user Throughput & difference.
definition of logical & physical or type & use.
Plz…..
Tell me, how consider the frequency for one TRXPlz share me detail of of the following Q…
1: How many Trx in 1 sector of BTS,
2: Difference Between RSCP & RxLeve, why RSCP level is Less than Rxleve.HOW MANY TRX ARE THERE IN A SINGLE MODULE
