- This topic has 22 replies, 1 voice, and was last updated 11 years, 3 months ago by pix.
21st February 2012 at 21:19 #66146mannuGuest
Thanks for reply.
This problem has happened since the site on air i.e from last one month.
And uplink quality handover is high on daily basis with more than 60-70% only that particular sector.
There is no frequency issue i am sure about it,and i already restart bts.There is 4 trx in that cell and average TCH assignment is around 2000.ALU bts model MBI5 is used on the site,is there any other parameter we can tune or any such report in which we find exact reason for Uplink quality handover ? Current time advance value is 3,and i am not able to find know how i will give idle channel interference.
Mannu22nd February 2012 at 15:56 #66147pixGuest
is it a micro bts or a MBI5 ???
idle interference is a KPI located in NPO.
Object = Cell
Function = Indicators
search for “Idle”, you’ll find them eventually.
pix23rd February 2012 at 13:22 #66148mannuGuest
BTS type used on the site is MBI5,and i checked IDLE Interference report on NPO and its show there is no Interference on any other bands.
Pix do you think combiner issue may also caused this uplink quality handover problem,can i reset combiner from OMCR its is possible?
And also in other sector of the site someday uplink quality handover percentage is high i.e 6-7 % and also call drop is 0.7% average from last 7 days.
Please suggest something for both the sectors.
Mannu23rd February 2012 at 14:05 #66149pixGuest
please share more QoS stats. The problem is too vague.
Yes, you can reset the whole BTS or just the combiner. But the combiner has nothing to do with RxQual (theoretically). I would rather suggest that the TRX may have a problem.
But anyway, you really need to describe your problem with QoS stats. Right now, I don’t understand your problem : UL QUAL % = 6% is good. CALL DROP % = 0.7% is good.
pix23rd February 2012 at 15:24 #66150mannuGuest
First i clear few point for your reference.
1. There are two sectors in a Site(IBS)A & B.
2.BTS used is MBI5.
3.For Sector A KPIs are as follows average for 7 days with operator thresholds.
SD Drop-0.2(threshold 0.3) OK.
TCH Drop-0.7(threshold 0.3)Not Ok.
Incoming HO-97 (threshold 99)Not Ok.
Outgoing HO-99 (threshold 99) Ok
HO Due to UPlink Quality-6.4(threshold 3) Not ok
HO Due to downlink Quality-5.6(threshold 3) Not ok.
And also there is no Sd or TCH blocking in this Sector A.
Now we come on Sector B.
In this sector all the KPIs are under threshold except Handover due to Uplink Quality % is very high if u asked % wise then its 60% average and if number wise then there is 15-20 sample average.
And i also check all trx in sector B by changes pref mark,but uplink quality handover % still very high.And also i reset the whole BTS.
Hope things were clear for you.
Mannu.23rd February 2012 at 19:45 #66151pixGuest
the thresholds in your network are insane…
in sector B – 60% UL Quality HO is very high. But number wise : 20 samples…
What does it mean ? That there were 20 Handovers per hour ? per day ? 20 is absolutely nothing, you should not be doing statistical analysis on 20 samples.
What is the target cell for those HO ?
Check the object “Adjacency” in NPO, Indicators> Matrix > Incoming Handover Requests & Attempts & Success. Please share those values with me.
Have you checked for “swapped feeders” ? But usually, the effect is on UL LEV HO % or DL LEV HO %. Not so much on the Quality.
Well, your problem is so small that I don’t think you should spend time on it 🙂 (but i’m not your manager, unfortunately) What is the RTCH Erlang BH for those two sectors ?
pix23rd February 2012 at 20:10 #66152mannuGuest
Unfortunately we had to achieved this threshold and problem is even worst when the site is IBS.
Its Busy Hour KPIs in a day.
And i mention earlier that there is no problem with HO in sector B.
Do you have any idea which other hardware cause this problem.
Mannu24th February 2012 at 10:06 #66153pixGuest
yes, you said there were problem with HO in sector B.
“Now we come on Sector B.
In this sector all the KPIs are under threshold except Handover due to Uplink Quality % is very high if u asked % wise then its 60% average and if number wise then there is 15-20 sample average.”
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