- This topic has 83 replies, 1 voice, and was last updated 14 years, 11 months ago by kuldeep.
18th October 2005 at 12:44 #36673joodGuest
1 TRX= 2 time slot on E1
….. for TRU basic function I think i send it for you (BTS description) by monaemh.23rd October 2005 at 05:35 #36674Dilip KrishnaGuest
What exactly is this Assignment failure ratio? I am working on the Nortel system and the most of the sites shows a lot of assign failure ratios.Can u pls clarify..23rd October 2005 at 11:48 #36675VartGuest
Hi All ,
As to SFH(JD’s question) – what’s use in 4\4\4 cells with 25 frequencies avalaible? Taking into account BCCH carrier and guard, we have 9 freq. avalaible. Even with SFH, you have 3 neigbouring cells, 3 TRX(+BCCH) each. What about the interference? What is the real rechable value of load in this area?26th October 2005 at 06:14 #36676joodGuest
hi Dilip Krishna
assignment on what TCH or SDCCH or what quz there is diff kinds of assignment.2nd November 2005 at 14:59 #36677VIiar gomesGuest
Could you please tell me ,how many
traffic channels can be used (simultaneously)per every (GSM)frequency.This using FR TCHs.
As 2 TS are used for signalling I assume that max.6 RF TCH can be sued.
BR/Vilar7th November 2005 at 18:07 #36678JOHN WILLIAMSGuest
I WANT TO KNOW IF VODACOM, IS USING ALCATEL OR ERICSSON BTS EQUIPMENT FOR THIRE NETWORK OPERATION.9th November 2005 at 06:24 #36679sunnyGuest
Consider following example, u have 1 base station having 3 sectors n u have 9 TRX (freq). Therefore 9TRX will be divided in 3sec. Hence 1 sec wil have 3TRX means 3×8=24 time solts. out of 24 TS 1 will be used for BCCH,1 for SDCCH n remaining 22 FR TCH.
Same applies for other sectors.
Note;Only first TRX of that particular sector will have BCCH or SDCCH remaining all 8 TS of other TRX can be used for TCH.Also in some cases there can be more then 1 SDCCH (say2),then number of TCH will be 21.
Got it11th November 2005 at 08:43 #36680jaiGuest
you might be confusing while explaning that configuration ……..
Actuall I’ve worked as a O&M engineer..
if you have a 3+3+3 comfiguration..
then in each sector there is 1 TRu for BCCH(signalling)..
and the remaining 7 TS in each sector r used for Voice tranmission..
with regards11th November 2005 at 08:46 #36681jaiGuest
ANd i forgot to tell you that while commisioning a BTS there are some tests.
LIKe BCCH Shifting test
Each CDU has one main RX path and One DIV path
bye11th November 2005 at 10:29 #36682sunnyGuest
jai, in ur case the BCCH & SDCCH shares same TS. Am I right???
But I have given very general example in which BCCH & SDCCH are on different TS.
Bye.12th November 2005 at 11:21 #36683ABHINAVGuest
I want to know about ICM band..
it is shown at BSC end…..
bye13th November 2005 at 10:56 #36684sanjeevGuest
can anyone tell me why TRAU is used in Abis interface. what are its important function?1st December 2005 at 12:00 #36685nidhinGuest
A FACCH comes in when u require handoff during TCH. But how is handoff done when in signalling mode SDCCH or when in idle mode?
nidhin1st December 2005 at 13:41 #36686joodGuest
HO in dedicated mode not in idle mode.13th February 2006 at 13:01 #36687AYATGuest
whai is the difference between TCH assign Failure & TCH alocated Failure?