In this section:

 

QoS-based routing towards a terminating gateway/subscriber is configurable from both a signaling and a media perspective. For Media QoS KPI Profile, see "Media QoS KPI Profile".

The Signaling Quality of Service (QoS) Key Performance Indicator (KPI) Profile provides a mechanism to calculate the various signaling KPIs to measure signaling QoS-related routing parameters, and use the results to make informed decisions when routing calls.

Since these constraints are very dynamic, a utilization factor for each route is configurable on PSX/ERE for the route. This utilization factor is then provided to SBC as part of the route attributes, and is used by SBC to filter out any route/trunk group failing the criteria.

Command Syntax

CLI syntax to configure a Signaling  QoS KPI Profile:

% set profiles signaling signalingQosKpiProfile <profile_name> 
	asr <disable|enable> 
	asrThreshold <0-100> 
	clu <disable|enable> 
	cluThreshold <0-100> 
	kpiExpression <0-255 characters> 
	pgrd <disable|enable> 
	pgrdThreshold <50-10000> 
	profileActive <disable|enable> 
	scru <disable|enable> 
	scruThreshold <0-100>

CLI syntax to assign Signaling QoS KPI Profile to IP Signaling Profile:

% set profiles signaling ipSignalingProfile <profile_name> egressIpAttributes signalingQosKpiProfile <signalingQosKpiProfile_name> 
% set profiles signaling ipSignalingProfile <profile_name> egressIpAttributes flags qosBasedRouting enable

Command Parameters

The Signaling Qos KPI Profile Parameters are shown below:

 

Signaling QoS KPI Profile Parameters

Parameter

Length/Range

Description

signalingQosKpiProfile

1-23

QoS KPI profile name.

asr

N/A

Use this flag to enable Answer Seizure Ratio (ASR) KPI.

  • disable (default)
  • enable

asrThreshold

0-100

ASR threshold (default = 70).

clu

0-100

Use this flag to enable Call Limit Utilization (CLU) KPI.

  • disable (default)
  • enable

cluThreshold

0-100

CLU threshold (default = 70)

kpiExpression

1-255

Enter the expression defining this KPI. The default value is "ASR&&CLU&&SCRU&&PGRD" where && operation means that only when all the KPIs in the expression are good, will a route be chosen for carrying traffic. If any are bad, the route is rejected for that particular call from the list of routes available from Policy response. If the only available route is rejected, the call is dropped.

Other configurable examples:

  • ASR||CLU||SCRU||PGRD
  • ASR&&(CLU||SCRU)
  • ASR&&CLU||ASR&&SCRU

pgrd

N/A

Use flag to enable Post-Gateway Ringing Delay (PGRD) KPI.

  • disable (default)
  • enable

pgrdThreshold

50-10000

PGRD threshold in milliseconds. (default =1000).

profileActive

N/A

Use flag to enable this profile.

  • disable (default)
  • enable

scru

N/A

Use flag to enable SCRU KPI.

  • disable (default)
  • enable

scruThreshold

0-100

Sustained Call Rate Utilization (default = 70)

Command Example

This example creates and enables a QoS KPI profile named "MyQosProfile", and enables ASR and CLI KPIs. The ASR threshold is set to "55" while CLU thresholds is left at default value of "70". With the next two commands, "MyQosProfile" is associated with "DEFAULT_SIP" IP Signaling Profile and QoS-based routing is enabled.

% set profiles signaling signalingQosKpiProfile MyQosProfile asr enable asrThreshold 55 clu enable profileActive enable 
% show profiles signaling signalingQosKpiProfile 
	MyQosProfile 
profileActive enable; 
asr enable; 
asrThreshold 55; 
clu enable;

% set profiles signaling ipSignalingProfile DEFAULT_SIP egressIpAttributes signalingQosKpiProfile MyQosProfile 
% set profiles signaling ipSignalingProfile DEFAULT_SIP egressIpAttributes flags qosBasedRouting enable

 
 
 

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