BTS TRX

dears

we r lossing traffic after increasing the capacity in BTS-6000 family. (BTS-6102) do u have experience in this regard??

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?

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
pix

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

Humyoon 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 user

WHAT IS dual Half rate & capacity in er-lang.

what is LLC Throughput & user Throughput & difference.

definition of logical & physical or type & use.

Plz 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.