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# TRX

Viewing 11 posts - 1 through 11 (of 11 total)
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• #64268
israel
Guest

my question is, knowing the number of subscribers you want to cover, how do you calculate for the numberof TRX that will support that number of subscribers

#64269
cris
Guest

Hello

Is a TRX a Hw module or is the Dual TRX (EXxA) a HW module?

could be to remove only one TRX or has to be removed the EXxA?

#64270
Bijoy
Guest

Hi Israel
That’s simple
Lets assume you have 10000 subs with .20mErl/sub,so total Erl=2000 erl

Now ,considering sites with 4/4/4 conf.we need 2000/20=100 cells,ie 400 TRX.

Br\\
Bijoy

#64271
Israel
Guest

can some one tell me what frequency hopping is. Pls break it down so i can understand

#64272
Arjun
Guest

The frequency on which the information is transmitted changes for every burst is called frquency hopping.

#64273
Israel
Guest

what is the difference between a cell and a sector in a given BTS

#64274
cris
Guest

Hello

Is a TRX a Hw module or is the Dual TRX (EXxA) a HW module?

could be to remove only one TRX or has to be removed the EXxA?

#64275
Pix
Guest

Hi,

The TRX is a logical entity, which is carried by a physical board. Your EXxA is carrying 2 TRXs, so if only one TRX is showing some problems, you probably have to replace the EXxA.

(warning: i’m not familiar with your vendor’s equipment, just saying some generalities… I hope it will help)

Israel,
One “BTS” sector = one cell

You can use also the word “Sector” to refer to the azimuth of the antennas. For example, one sector is facing 100°. In case of multiband or 2G/3G site, several cells could be actually facing this azimuth. One 2G-900 cell, one 2G-1800 cell, and one 3G cell… So here, you have 3 cells on 1 sector.

Regards
pix

#64276
Najib Fakhreddin
Guest

Dear, 1 TRX is two channels which is 8 time slots, by meaning a maximum o 7 subscribers can be handled by 1 TRX. so depending on the number of subscribers you can easily get the number of desires TRX.

#64277
ajay
Guest

Can anybody give me the technical explation for having only 8 Timeslot in one TRX. Why cant it be more than 8???

#64278
pix
Guest

hi,

gsm is a synchronized system. 3GPP decided to go for 8 TS per TRX. If they put more, then each occurence of one timeslot will be less frequent. Therefore, the throughput per TS would be smaller.

in GSM, TS throughput is optimized to carry full rate voice codecs (FR = 13kbps) with good radio protection.

regards
pix

Viewing 11 posts - 1 through 11 (of 11 total)
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