NSN LTE RRC CSSR,ERAB SR,ERAB DCR

[kentck86]

Hi All,

I am having the following highest failure counter for the respective KPI, does anyone knows does NSN RL40 having Timing advance counter available. Thus, i am able to found out whether the following failure are probably caused by cell overshooting? Or maybe there is any timer which is related to this?

LTE_5218c Total E-UTRAN RRC Connection Setup Success Ratio
Highest Failure cause counter: M8013C6-RRCCOMPL_Miss fails

LTE_5017a E-UTRAN E-RAB Setup Success Ratio
Highest Failure cause counter: M8006C2-Fails, RNL

LTE_5025d E-UTRAN E-RAB Drop Ratio, RAN View
Highest Failure cause counter: M8006C12-Fails,ENB rel, RNL


thank you

[4GExpert]

Hi,

For M8013C6-RRCCOMPL_Miss fails increase t300.
For others check site basis, mostly sites with various alarms like GTPU path failure causes these issues.

Regards,

[kentck86]

Hi,For M8013C6-RRCCOMPL_Miss fails increase t300.For others check site basis, mostly sites with various alarms like GTPU path failure causes these issues.Regards,Hi sir,Do we have timing advance parameter in NSN LTE, thus i can check if the cell is overshooting. As if the site is already overshooting, thus i believe by increasing T300 is not a better idea for this solution. Moreover, i checked the sites with others failure causes, there is no alarm.thank you

[rosan]

No TA counters until RL70 but you can use trace viewer to capture TA for limited number of cells at a time.

[venom]

For RRCCOMPL_MISS - Try changing the dlrsboost to 0, this may improve the Setup Session Success Rate.

For E-RAB Drop Ratio, try reducing the threshold 4. try to keep the Handover Measurement window to 3 db.

If 4G to 3G handover measurement window is too high then it is likely to drop.

[Matrixff]

Hi All, can anyone explain me why the overshooting degrades RRC CSSR - cause RRCCOMPL_MISS?