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Cisco Bug: CSCup63373 - QPS calculates MBR-DL,MBR-UL for a VoLTE GBR bearer wrong

Last Modified

May 09, 2017

Products (1)

  • Cisco Policy Suite for Mobile

Known Affected Releases

6.1.1

Description (partial)

Symptom:
Wrongly calculated QoS message is send towards PCEF/PGW for  a VoLTE GBR bearer.

When QoS values are send by PCSCF and there is no service specific object configured for the subscriber,QPS calculates the QoS based on section 6.2 of 3GPP TS 29.213 and sends it to PCEF.This calculation appears wrong and resultant QoS granted for a Voice call is inadequate.

Conditions:
When QPS receives MBR-UL,MBR-DL,RR-Bandwidth,RS-Bandwidth etc from PCSCF,the resultant QoS mapping towards Gx is wrong.Seems like for RTP and Non RTP flows PCRF is simply adding up the RR-Bandwidth and RS-Bandwidth received from PCSCF and populating it as Max-Requested-Bandwidth-DL and Max-Requested-Bandwidth-UL.
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