- This topic has 117 replies, 1 voice, and was last updated 15 years, 10 months ago by Babar.
20th December 2005 at 13:16 #41342VijayGuest
Can u plz tell me abt abis sdcch drop rate why this drop is happned?
i want to knw abt the LAC planning?can any body help me.
i didnt find the ans. of que..
if 1 TS faulty than whole Trx. faulty or its problem of 51 multiframe??
how to check TS working or not in TEMS4.1?
and Tyagrajan is it true HO desion from only take a measurment of BCCH rx_level?20th December 2005 at 14:03 #41343joodGuest
#-85db according to the ericsson algorithm is the minimum access for PLMN selection.
if there is no HPLMN & no permitted PLMN for roaming => the MS will be powered on but not connected to network. But just making periodic attempt to get an access.
# about the restriction, I don’t know, I will search to know about that,
BR21st December 2005 at 12:27 #41344suvenduGuest
dear mr jood,
i found this restriction in GSM rec 3.22 , but the rec’s are not user friendly.!
thatswhy i asked u16th March 2006 at 08:57 #41345AshishGuest
Would like to know the purpose ob BCCH allocation list and Mobile allocation list at BSC.1st April 2006 at 07:18 #41346VivekGuest
Hi to all,
Can anyboby help me with Frames Structure… What i know is 26 TCH frames and 51 BCCH frames are used. This means For Traffic channels 4.616*26=120ms. And for BCCH 51*4.616=235ms. I just want to know how Both of these get synchronised into Super and Hyper Frames. Please explain……..1st April 2006 at 12:20 #41347joeGuest
No need for synchronization Cuz after transferring to dedicated mode (tch) from the common mode (control ch) you dont have to connect BOTH.31st May 2006 at 06:48 #41348Faiq ShahzadGuest
what is 1X1 Frequency Hopping2nd June 2006 at 12:03 #41349tufailGuest
1×1 Fh system means tht u r using same MAlist in all ur cell for frequency hopping.
tufail11th July 2006 at 10:49 #41350colinGuest
can anyone explain to me what is baseband hopping and synthesized hopping.11th July 2006 at 11:06 #41351PavelGuest
baseband hopping – when all TRX under cell use hopping except BCCH TRX.
synthesized hopping – when all TRX under cell use hopping.11th July 2006 at 15:25 #41352VanderleyGuest
Pavel you are not right.
Baseband is when the number of hopping freqs are limited by the number of TRXs. Syntezised means that you have a certain number of freqs 2 or 3 times more than the TRX to hop on. Also in SFH your BCCH does not hop.13th July 2006 at 14:25 #41353VanderlayGuest
Do you have any info about 1×3 Enhance SFH, about which Wilibrordus Herbowo is talking about?
Tnx in advance7th August 2006 at 23:40 #41354MichaelGuest
Please i want to have a comparison between hybrid and filter combiners used RF Tx combining for a GSM network, viz a viz: Losses, Output Power, Reliability etc.8th August 2006 at 02:39 #41355PixGuest
you refer to this post ?
“SFH 1×3 Enhance is one of fitur of vendors, as I know Siemens can do SFH 1×3 Enhance.
let say :
sector 1 have A malist, sector 2 have B malis, and sector 3 have C malist, so for enhance, the MALIST become : A+B for sector 1, B+C for sector 2, and C+A for sector 3.
If we have many frequencies, better we use non hopping system. or better goes to SFH directly.”
I think it is quite explicit, even though i’ve never seen it. Actually, (as far as i understand it) it’s more like a trick, a kind of “1 x 1.5”. It’s not really a feature because one can implement it like any other SFH grouping. Now, I may be wrong.
How do you interpret his post ?8th August 2006 at 15:00 #41356VanderleyGuest
Yes I refer to that post.
I also understand it like a trick but Wilibrordus is talking about a feature???
That’s why I am asking. What will be the load in that case? In 1×1 it is 16% (30 freq = 5TRX) or in 1×3 it is 50% (30 freq per site => 10 per sector => 5TRX).
In 1x3enhance is it again 50%? If yes then you have 10TRX????
How could you provide that if you are hopping on A+B on sector 1 and on B+C on sector 2 you will never have at a certain moment of time same freq on two sectors?
- The forum ‘Telecom Design’ is closed to new topics and replies.