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Kalvera
2008-11-02, 12:00 AM
Hi all,

Please can you expain breifly how I can analize missing neighbours in 2G? using TEMS investigation?

regards,
K

hassen
2008-11-02, 01:00 AM
Hi all,

Please can you expain breifly how I can analize missing neighbours in 2G? using TEMS investigation?

regards,
K
from hand over event no attempt it means missing neighbours.
or run report from TEMS investigation 8.0 to find out
missing neighbours from parameters Bsic BCCH.

Nautilus
2008-11-02, 01:35 AM
You need compare rx level idle and active with strong scanned rx level on the map in MapInfo.

Kalvera
2008-11-02, 01:38 AM
Hi Hussen thanks for prompt reply.

The thing is I have handover failure events from MS, so when i go into L3 message i see Handover Command from BSC, after MS tunes to new frequency and TS which was commanded from BSC, but after that i get handover failure and I get this message very often, in my understanding after Handover Command new cell resources are arranged but why i do receive this error message can't udestand? please if you can advise me is it missing neighbour issue?

thanks in advance

hassen
2008-11-02, 02:02 AM
Hi Hussen thanks for prompt reply.

The thing is I have handover failure events from MS, so when i go into L3 message i see Handover Command from BSC, after MS tunes to new frequency and TS which was commanded from BSC, but after that i get handover failure and I get this message very often, in my understanding after Handover Command new cell resources are arranged but why i do receive this error message can't udestand? please if you can advise me is it missing neighbour issue?

thanks in advance
HO failure include (reversion and lost).
Try to find a good neighbour for this cell.
for HO failure no relation with missing neighbour ,but there are 2 relations with
same Bsic and Bcch wich cause failure ,make Bsic tune to ovoid this kind of
problem.
good luck !

GSM_Huawei
2008-11-02, 02:02 AM
-you can export logfile : menu logfile\export logfile\text file\
after select tab menu information elements : select parameter GSM or CDMA.
-select tab option : select mode report detail.
- after insert logfile : input logfile
-when export finish ,you open with this loglife by excell, select event missing neigbour.

alibushehri
2008-11-02, 02:03 AM
Dear Kalvera,

As i understand you have alot of HO Failure; which means you have one of the following problems:

1- Co-BSIC + Co-BCCH which is a common probelm !!
2- you have congestion on your target cell(s)
3- wrong HO parameters
4- or you don't set a good neighbor list for your cell(s)

also i sugget you to study your vendor's HO decision algorithm

BR//
Ali

Kalvera
2008-11-02, 02:15 AM
Thanks guys really very much!

It's my first time on GSM analysis so I'm little bit confused not to make any mistake.


If anyone has good manual for post processing of GSM log files would be great.

Thanks in advance

alibushehri
2008-11-02, 02:36 AM
http://www.finetopix.com/showthread.php?t=1467

netter2k
2008-11-02, 06:26 AM
Hi Kalvera,

-You can running RA TI 8, open your logfiles, after that you can see report error.
-Running Data collection TI 8, open your logfiles, replay, then see GSM Serving+Neighbors tab, compare Rx Lev between serving cell and neighbor. If neighbor's Rx Lev better than serving cell, HO should be done, if no, maybe neighbor not created yet, check in the parameter data.
-As alibusheri said, maybe the target cell is congestion, check capacity TCH and TCH availabelity in the statistic data.
-Check in mapinfo, BCCH and BSIC between serving cell and target cell, maybe Co-BCCH and Co-BSIC

Hope it can help you.

BR\\Netter

venom
2008-11-02, 08:42 AM
TEMS can show the maximum 15 neighbors, it never reports more than that... if u want to know the neighbor is missing then u can see the neighbor list with the event in which if it is showing. It is always a good practice to see the BSS dumps before going for the drive test. It will tell you the history of the site definitions !

Remember, TEMS will never show the Co-BCCH in NEIGHBOR list, Co-BCCH can not be defined in BSS end as a neighbor. It can show the Adjacent channels !!

venom
2008-11-02, 08:45 AM
If u r facing handover failure problem then remember the neighbor is defined otherwise it wouldnt have been failed. Try to see the reason behind it, check the quality, check the RxLev of the Neighboring Cell. You also need to check the foot print of the site !!

Kalvera
2008-11-02, 07:55 PM
file:///C:/Users/Omar/AppData/Local/Temp/moz-screenshot.jpgGood morning again everybody, sorry for disturb but i still have one more question:) in attached RAR file u can find my handover failiure i have included both MR and handover command from BSC please have a quick look on it and advise what could be problem, is it possible to distinguish from log files if other cell interfere with mine in sence of BSIC BCCH?


thanks in advance

aircom_vn
2010-03-16, 05:14 AM
file:///C:/Users/Omar/AppData/Local/Temp/moz-screenshot.jpgGood morning again everybody, sorry for disturb but i still have one more question:) in attached RAR file u can find my handover failiure i have included both MR and handover command from BSC please have a quick look on it and advise what could be problem, is it possible to distinguish from log files if other cell interfere with mine in sence of BSIC BCCH?


thanks in advance

how to download your file?
I am a memeber that don't have a permission of downloading file directly from this forum. Pls upload this file on share-website.
Thanks

testtest
2010-03-28, 04:57 AM
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