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# BTS TRX

Viewing 15 posts - 61 through 75 (of 78 total)
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• #50964 Reply
Zainab Khan
Guest

can anyone please tell me how to improve Minutes per Drop MPD in NOkia BSC..!!

#50965 Reply
Daud Mohttat
Guest

dears

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

#50966 Reply
Sandeep Jain
Guest

How many erlangs in one TRX

#50967 Reply
HUMAYUN KHAN
Guest

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?

#50968 Reply
Mayur R Neelavar
Guest

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..

#50969 Reply
pix
Guest

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

#50970 Reply
Sunkanmi
Guest

Hello 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.

#50971 Reply
pix
Guest

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

#50972 Reply
Sunkanmi
Guest

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?
Thanks

#50973 Reply
Adil khan
Guest

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

#50974 Reply
SHAHID TANVEER
Guest

A Trx have 8 timeslots and 1 timeslot for 1 user
1-Trx = 8 Timeslots
1-Timeslot = 1 user

#50975 Reply
RAMNARAYAN SONI
Guest

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

what is LLC Throughput & user Throughput & difference.

definition of logical & physical or type & use.

#50976 Reply
vijay
Guest

Plz…..
Tell me, how consider the frequency for one TRX

#50977 Reply
Jamshid Ali
Guest

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.

#50978 Reply
BHANU
Guest

HOW MANY TRX ARE THERE IN A SINGLE MODULE

Viewing 15 posts - 61 through 75 (of 78 total)
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