View Full Version : How to analysis DL Rx quality Issue when call is in Hopping Mode
rajmeena06
2012-03-30, 11:42 AM
Dear all,
How to analysis DL Rx quality Issue when call is in Hopping Mode through drive test.
In our network we are using Ad-HOC freq plan (12 bcch,9 tch (Band:-1800).
In the drive test i found major quality patches while call is in hopping mode now i need to anlayis those patches but i unable to find out the interfer freq ..Pl help me in analyis (Post prossing tool :actix).
Pl share some guide line.
ventinel
2012-03-30, 01:56 PM
Dear all,
How to analysis DL Rx quality Issue when call is in Hopping Mode through drive test.
In our network we are using Ad-HOC freq plan (12 bcch,9 tch (Band:-1800).
In the drive test i found major quality patches while call is in hopping mode now i need to anlayis those patches but i unable to find out the interfer freq ..Pl help me in analyis (Post prossing tool :actix).
Pl share some guide line.
Hi, first of all you need to figure out the reason of degraded rxquality, i.e bad coverage or high interference or some hardware issue at cell/trx. In case of bad coverage, redesign or disabling power control might help. Whereas in case of interference, check the co and adjacent tch frequencies for the serving cell. For hardware issues i hope you know the concerned for raising the issue and follow up :)
rajmeena06
2012-03-30, 07:14 PM
As There Rx level is -75 dbm and there is no co or adj BCCH .
Hardware fine,No Alaram.all Parameter is constant for all sites.
If your freq has no Adj or co channel, might also want to check your BSIC. Have you confirm there is no HW problems. potentialy RF leakage at site.
rfoptman
2012-03-30, 08:30 PM
Dear all,
How to analysis DL Rx quality Issue when call is in Hopping Mode through drive test.
In our network we are using Ad-HOC freq plan (12 bcch,9 tch (Band:-1800).
In the drive test i found major quality patches while call is in hopping mode now i need to anlayis those patches but i unable to find out the interfer freq ..Pl help me in analyis (Post prossing tool :actix).
Pl share some guide line.
My friend, I heard about: Ad-HOC freq plan already but I don't know what is it? may u please share more info about it?
rajmeena06
2012-03-30, 10:51 PM
Site hardware having no issue,but in three sector using same BSIC,diffrent bcch and tch and there is no same bsic or bcch in neigbour.
Bsic re-use distance is 3 Km.
RF engineer
2012-03-30, 11:10 PM
Dear all,
How to analysis DL Rx quality Issue when call is in Hopping Mode through drive test.
In our network we are using Ad-HOC freq plan (12 bcch,9 tch (Band:-1800).
In the drive test i found major quality patches while call is in hopping mode now i need to anlayis those patches but i unable to find out the interfer freq ..Pl help me in analyis (Post prossing tool :actix).
Pl share some guide line.
You can disable hopping and check the Rx qual per TRX if there is problem you can find and by the way the ad-hoc you used is 100% load which i meant frequencies = # TRX.
BR
RF engineer
2012-03-30, 11:12 PM
My friend, I heard about: Ad-HOC freq plan already but I don't know what is it? may u please share more info about it?
Ad-Hoc frequency plan is mixed of Baseband frequency plan but Hopping type is SFH which means if you have 3TRXs you will assign 3 Frequencies and put hopping type as SFH.
BR
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