Cisco Cisco Packet Data Gateway (PDG)
ECS Changes in Release 16
▀ ECS Enhancements for 16.0
▄ Release Change Reference, StarOS Release 16
116
ECS Enhancements for 16.0
This section identifies all of the ECS enhancements included in this release:
Feature Changes - new or modified features or behavior changes. For details, refer to the ECS Administration Guide
for this release.
for this release.
Command Changes - changes to any of the CLI command syntax. For details, refer to the Command Line Interface
Reference for this release.
Reference for this release.
Performance Indicator Changes - new, modified, and deprecated bulk statistics, disconnect reasons, counters and/or
fields in new or modified schema and/or show command output. For details, refer to the Statistics and Counters
Reference for this release.
fields in new or modified schema and/or show command output. For details, refer to the Statistics and Counters
Reference for this release.
CSCue69163 - I-RAT handover - change in Rating Group to utilize CCR-U on Gy
interface
Applicable Products: P-GW
Feature Changes
Optimized S2b Handoff Handling at ECS
Previous Behavior: During an I-RAT handover with dedicated bearers active, when the handover happens between
LTE and WLAN, P-GW tears down the dedicated bearer. If Online Charging is enabled at the bearer level, P-GW sends
a CCR-T to the OCS and once the dedicated bearers are setup after successful handoff, P-GW sends a CCR-I again to
terminate and re-initialize the Gy sessions with OCS during the Rating Group Change.
LTE and WLAN, P-GW tears down the dedicated bearer. If Online Charging is enabled at the bearer level, P-GW sends
a CCR-T to the OCS and once the dedicated bearers are setup after successful handoff, P-GW sends a CCR-I again to
terminate and re-initialize the Gy sessions with OCS during the Rating Group Change.
This behavior of sending extra messages (CCR-T and CCR-I) caused increase in Gy traffic. P-GW should be sending a
CCR-U to request for quota from OCS in the I-RAT handover case.
CCR-U to request for quota from OCS in the I-RAT handover case.
New Behavior: During S2b handoff ECS will ignore the delete bearer operation and instead move the dormant bearers
to active state after successful handoff. This will make sure that a CCR-T is not sent to Gy upon receiving delete bearer
from P-GW. This optimization feature is implemented to intelligently send only a CCR-U for requesting quota for
changed rating groups on dedicated bearers after handoff.
to active state after successful handoff. This will make sure that a CCR-T is not sent to Gy upon receiving delete bearer
from P-GW. This optimization feature is implemented to intelligently send only a CCR-U for requesting quota for
changed rating groups on dedicated bearers after handoff.
The current behavior of P-GW is changed to utilize a CCR-U on the Gy interface during the Rating Group change for I-
RAT handover between WLAN and LTE.
RAT handover between WLAN and LTE.
Customer Impact: Less traffic on Gy is observed since the bearer is not deleted during handoff at ECS.
CSCug70309 - S5 Signaling minimization for MBR change of non-GBR flows
Applicable Products: P-GW
Feature Changes
Suppression of Update Bearer Requests