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System Changes in Release 17
System and Platform Enhancements for Release 17.0 ▀
Release Change Reference, StarOS Release 17 ▄
625
Feature Changes
ICSR Framework Changes to Support VoLTE
Additional internal enhancements have been made in this release to support voice-grade redundancy for Voice over LTE
(VoLTE) deployments. ICSR components have been internally optimized to ensure that failure recovery is
accomplished within acceptable limits for VoLTE. The impact on the data path is high priority.
(VoLTE) deployments. ICSR components have been internally optimized to ensure that failure recovery is
accomplished within acceptable limits for VoLTE. The impact on the data path is high priority.
The table below cross-references the various CDETS IDs that have been addressed as part of this ICSR-VoLTE
performance optimization.
performance optimization.
Table 2. ICSR-VoLTE Enhancements
CDETS ID
Description
Impact
CSCuf30336
fw-and-nat policy ID checkpointing to
peer chassis
peer chassis
Supports backward compatibility for inline services.
CSCuh89843
SM PGW Performance: FC are 50%
more in make/break call model
more in make/break call model
Eliminates redundant second timer for full checkpoint.
CSCui26809
SR:Stats to check the number of FC and
Microcheckpoints
Microcheckpoints
Adds statistics for how many times an archive is being sent or
received, as well as checkpoint statistics. This data can be used for
session recovery.
received, as well as checkpoint statistics. This data can be used for
session recovery.
CSCui31912
MemoryOptimization: Move per-
session chkpt information to instance
level
session chkpt information to instance
level
Create infrastructure for sharing common Diameter peer information.
See CSCum57444
See CSCum57444
CSCul28844
SR: Optimisation of Prioritisation of
calls based on priority
calls based on priority
Creates separate lists in aaamgr for VoLTE/Emergency calls. The
array for each list points to a particular priority.
array for each list points to a particular priority.
CSCul42657
Memory Fragmentation in Session
Recovery code path
Recovery code path
Minimizes frequent malloc and release cycles that result in memory
fragmentation.
fragmentation.
CSCul46207
CSCul54505
CSCul54509
CSCum19798
CSCul54505
CSCul54509
CSCum19798
VoLTE:Zero billing loss during
switchover with < than 3 sec data
outage
switchover with < than 3 sec data
outage
Internal changes made to minimize zero billing loss during ICSR
switchover.
switchover.
CSCum17282
CSCum17169
CSCum17389
CSCum17169
CSCum17389
[17.0] VoLTE Retainability KPI
Provide counters, KPIs and corresponding bulkstats to measure
VoLTE specific performance.
VoLTE specific performance.
CSCum50114
Initiate Session Checkpoint upon
Session Creation
Session Creation
An ICSR check point is sent immediately after an IMS PDN session
is created to avoid checkpoint loss for sessions established within 60
seconds of an ICSR switchover.
is created to avoid checkpoint loss for sessions established within 60
seconds of an ICSR switchover.
CSCum57323
Messenger Bounce handling for flush
complete message
complete message
Implements a callback mechanism to handle message bounces from
vpnmgr.
vpnmgr.
CSCum57428
ICSR:Handling MC when FC is queued
When a full checkpoint is queued, a pending micro checkpoint is
discarded.
discarded.
CSCum57444
SR:Instance Level Checkpoint
framework for recovery
framework for recovery
Reduces the amount of information replicated by the SRP Call
Recovery Record task.
Recovery Record task.