для Cisco Cisco Packet Data Gateway (PDG)
MME Changes in Release 17
▀ MME Enhancements for 17.2
▄ Release Change Reference, StarOS Release 17
270
Previous Behavior: During S1-based CS-PS SRVCC handover, the MME used to send “Preparation Failure” for
below mentioned types of failures:
below mentioned types of failures:
Peer SGSN DNS query failed
Fwd Relocation Response timeout
Fwd Relocation Response was received with a failure cause
New Behavior: Now, in the above failure scenarios, S1-based CS-PS SRVCC handover will continue for CS calls if
CS handover on Sv interface succeeds. This means that the S1 SRVCC handover will continue as partially successful
and the hanover command message will not carry any bearer related information.
CS handover on Sv interface succeeds. This means that the S1 SRVCC handover will continue as partially successful
and the hanover command message will not carry any bearer related information.
Customer Impact: S1-based CS-PS SRVCC handover will continue for CS even if the PS handover fails.
Performance Indicator Changes
MME Schema
New bulk statistics tracks the total number of successful circuit-switched (only) 4G to 3G/2G CSPS SRVCC handovers
- E-UTRAN to UTRAN (Iu mode) - using the Sv interface.
- E-UTRAN to UTRAN (Iu mode) - using the Sv interface.
s1-ho-4gto3g-csps-sv-success-cs-only
show mme-service statistics verbose
A new counter has been added to the output generated by this command to indicate the number of CS - PS handovers
for the Sv interface that were partial successes.
for the Sv interface that were partial successes.
Success CS Only:
CSCuq86490 - Include IMEI and IMSI in traceRecording element in Cell Traffic
trace
Feature Changes
Including IMEISV in the XML Trace File
Previous Behavior: Only IMSI was added in the XML trace file generated during a normal attach call. For emergency
calls, only IMEI was added in the XML trace file.
calls, only IMEI was added in the XML trace file.
New Behavior: If the MME is aware of the IMSI and IMEI(SV) values, then the MME will include both IMSI and
IMEI(SV) values in the generated XML trace file.
IMEI(SV) values in the generated XML trace file.
CSCuq88194 - New Reject cause needs to be added under Bearer Alloc Reject
ESM message
Feature Changes
Counter and Stats Added to Track Reject Cause