- This topic has 11 replies, 1 voice, and was last updated 8 years, 4 months ago by sirasibe.
15th January 2010 at 10:01 #60710DeryGuest
I have been noticing something strange when I am doing a drivetest with TEMS investigation.
Sometimes I notice the same cell appearing twice on the “Serving + Neigours” Window, with the same BCCH. I’m tempted to think this is as a result of multipath effects, but I need clarification. Can you help me out?
Dery16th January 2010 at 22:37 #60711SBGuest
are you using any cell sites definition files which you may have imported to show cell sites name and otherinfo.any duplicate entry there:we had similar issue but that was totally data entry issue and displyed the info.twice.are you using TEMS 6.0 or 9.0 ?
Thanks20th January 2010 at 09:55 #60712JBGuest
Hi SB ,
We are not using any cell file still we are getting the double BCCH and BSIC.25th January 2010 at 15:17 #60713TheDarkKnightGuest
One of the scenarios in which a cell appears twice in the Serving + Neighbors window in TEMS is when Common BCCH config is used. If, for example, your BCCH is defined on 900 band only, and you are camped on the 1800 band, the cell will be displayed twice in the Serv+Nbrs window.9th February 2010 at 17:40 #60714Eric4uGuest
I think it has to do with your active BA list. If the serving cell’s BA list contains its own BCCH then it will measure its own frequency as a neighbour frequency. Check your active BA lists and see.11th February 2010 at 10:51 #60715pawandeepGuest
it is related to Double BA list .
if it is activated then it will appear twice otherwise it will be normal.
Check your Double BA list activation.19th March 2010 at 12:01 #60716agzGuest
I think this due to power control enabled in ur cell..one shows ur bcch s/g level
(no pc) and other level wn u r on power control….20th March 2010 at 04:57 #60717LexGuest
hi all the double bcch and bsic is due to the dual band ie if ur on 1800 then it sends mr’s of 900 and vice versa.26th March 2010 at 06:10 #60718guruGuest
I think its due to dual band cell with single bcch. we also observed the same in TEMS12th April 2010 at 05:46 #60719Mania,Guest
Actually the answer is a mix of all the three.
When you are on the inner-zone of a concentric cell. them some opperators allow you the option to include your own BCCH in the BA list thereby for inter-cell HO the outer-GSM-BCCH is compared with neighbouring BCCHs instead of the inner (DCS) level which is lower than GSM due to propogation loss difference / TX power difference.
The other option being to have a hysterisis defined va parameter to assist you in intercell HOs from inner-Zone. so its good. Pls tell us of your vendor so we can tell you what they are using / which parameter to varify27th July 2012 at 11:36 #60720khaledGuest
why i can see in serving+niubour window the same bcch twice for same cell name ? what does it refer to24th August 2012 at 21:24 #60721sirasibeGuest
you use power control your cell. I tired it