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RAB Drop Problem

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Mohib - 17th November 2016  (17:38 GMT)

Hello , Can you please check CE Utilization and congestion of the specific RAB failure cells and it is recommended to reduce the non real time services data rates. Thanks

Mohib - 17th November 2016  (17:36 GMT)

Hello , Can you please check CE Utilization and congestion of the specific RAB failure cells and it is recommended to reduce the non real time services data rates. Thanks

sanjeev - 25th July 2011  (05:14 GMT)

parameter name of rab drop causes

John - 5th June 2008  (09:11 GMT)

I meant; ...you must see equipments DOCUMENTATION

John - 3rd June 2008  (12:07 GMT)

If Tiar/Tias timer values are causing the RAB drops, then you must see equipments to see how to change those. It varies between the vendors.

Nitin - 3rd June 2008  (10:04 GMT)

So need to play with some parameters to solve these problem?
Is yes, then what are these?

John - 3rd June 2008  (09:39 GMT)

Hi,

Of course the drop can also happen due to some BTS issue, pre-emption, integrity check failure of some RRC message during e.g. radio bearer reconfiguration procedure (which happens failure often during UMTS nrt data call) & release from PS core (e.g. mismatch in Tias/Tiar timers between Core & RNC). I have also seen some UEs, which are using RRC:signallingConnectionReleaseIndication for PS CN wrongly and this is seen as RAB drop by some vendors' RNC.

Nitin - 3rd June 2008  (07:42 GMT)

Hi John,
Thanks for the reply,

I had checked missing neighbours, coverage, S.C etc. But it looks like ok. I had seen RAB drop rate heigh in many cells. So except sw bug, is their any other possibility for RAB Drop?

Regards,

Nitin

John - 3rd June 2008  (06:41 GMT)

I would say the reason is either coverage or sw bug, typically.

Nitin - 2nd June 2008  (15:17 GMT)

Hello,

Can any one explain what are the reasons behind RAB drop in UMTS?

Regards,

Nitin

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