Cisco Cisco ASR 5000
MTC Congestion Control
▀ Feature Description
▄ SGSN Administration Guide, StarOS Release 18
Feature Description
Congestion is detected based on various threshold-configurable parameters, such as (but not limited to) system CPU
utilization, system memory utilization, service CPU utilization. This feature enables the operator to determine the
SGSN’s response to various congestion scenarios.
utilization, system memory utilization, service CPU utilization. This feature enables the operator to determine the
SGSN’s response to various congestion scenarios.
The MTC Congestion Control functionality gives the operator control over the congestion threshold settings and the
actions taken in response to congestion. The operator defines a set of congestion actions in a congestion-action-profile.
The selected actions are executed when congestion is detected.
actions taken in response to congestion. The operator defines a set of congestion actions in a congestion-action-profile.
The selected actions are executed when congestion is detected.
Congestion control can be enabled as:
General congestion control - applicable only for Mobility Management messages.
APN-based congestion control for Mobility Management
APN- based congestion control for Session Management
There are three levels of system-detected congestion: critical, major, and minor. The percentage at which these levels
are hit is controlled via threshold configuration.
are hit is controlled via threshold configuration.
The operator defines the SGSN’s congestion response actions for new calls, active calls, and SM-messages in
congesetion-action-profiles and association those congestion-action-profiles with the various congestion level.
congesetion-action-profiles and association those congestion-action-profiles with the various congestion level.
In addition to system-detected congestion, the SGSN also provides a management option to trigger congestion. This
option can be useful when testing system readiness and response.
option can be useful when testing system readiness and response.
Relationships
Other SGSN Features: Low Access Priority Indicator (LAPI) in S-CDRs. The SGSN allows for the use of the LAPI
bit in S-CDRs of the custom24 dictionary. Use of this functionality is CLI controlled. For details about this
functionality, refer to the GTPP Interface Administration and Reference for StarOS™ Release 17.
bit in S-CDRs of the custom24 dictionary. Use of this functionality is CLI controlled. For details about this
functionality, refer to the GTPP Interface Administration and Reference for StarOS™ Release 17.
Other Products:While specific operations may vary, MTC Congestion Control functionality is also supported by the
MME. For details, refer to the MME Administration Guide for StarOS™ Release 17
MME. For details, refer to the MME Administration Guide for StarOS™ Release 17