The MMTelStodEnabled feature checks if the subscriber has the STOD service provisioned .
Feature Cheat Sheet
| B2BUA Instance | SAS Support | Originating / Terminating | Point(s) in Session Plan | Network Operator Data | Subscriber Data | Stateful or Stateless | POJO Feature or SBB Feature | Other notes |
|---|---|---|---|---|---|---|---|---|
MMTel |
No |
Both |
|
Yes |
Yes - subscriber data is from the HSS |
Stateless |
POJO Feature |
Session Input Variables
| Session State variable name | Type | Comments |
|---|---|---|
RegistrationRecords |
Complex |
List of registration records containing public id |
Subscriber |
String |
subscriber id |
Configuration
The configuration is stored in a JSLEE configuration profile with a profile table name of: MMTelStodEnabledConfigProfileTable.
The profile is scoped by the Sentinel selection key and by the subscriber uri. Example : Opencloud:::::alice@opencloud.com.
| Variable Name | Type | Constraint | Default | Default Value Interpretation | Note |
|---|---|---|---|---|---|
StodEnabled |
Boolean |
False |
Indicates the subscriber is not allowed to use the STOD service |
Session Output Variables
| Session State variable name | Type | Comments |
|---|---|---|
StodIsEnabledForUser |
boolean |
Set to |
AccessLegTrackingKeys |
Set<String> |
The set of external session tracking keys |
AccessLegTrackingActive |
boolean |
Whether or not this session will be externally tracked |
Statistics
| Name | Incremented when… |
|---|---|
Started |
the feature runs |
FailedToStart |
Sentinel VoLTE encounters an error while attempting to start the feature |
IssuedWarning |
a non-fatal problem is encountered and the feature issues a warning |
FailedDuringExecution |
a fatal problem is encountered and the feature cannot execute correctly |
TimedOut |
the feature takes too long to complete and Sentinel VoLTE aborts execution |
StodIsEnabled |
the Stod is enabled for a subscriber |
StodIsNotEnabled |
the Stod is not enabled for a subscriber |
StodEnableSessionTracking |
STOD session tracking is enabled for this session |
StodSessionTrackingDisabled |
STOD session tracking is disabled for this session |
FoundTrackingKey |
A tracking key has been created for this session and added to the set |
Behaviour
The feature acts on INVITE requests and on responses.
On an INVITE request, the feature checks if the subscriber has the STOD service provisioned.
For this, the IMPU is retrieved from registration data and matched with profile configuration.
If the profile exists and the StodEnabled boolean variable is true, the feature sets the StodIsEnabledForUser session state field.
On responses, the feature checks to make sure that STOD session tracking has been enabled for the Served-User in the triggering message. In the event that the trigger is on a 200 (OK) response for an incoming INVITE request the feature will create a tracking key. The tracking key is taken from an IMPU in session state and the Tracking Key Prefix IMPU. The tracking key is then added to the External Session Tracking Keys. When there is no subscriber in session state or in the registration records there will be no IMPU in which case there will be no session tracking.
Source
For source code information see MMTel Session Transfer Source Code
