Session Transfer to Own Device features. For an overview see Session Transfer to Own Device on Sentinel VoLTE Architecture.

Feature What it does

checks if the subscriber has the STOD service provisioned

connects the IMPU acquired from the subscriber registration to the existing ACI for the session transfer

handles the transfer request and route it to the previous bound session

intercepts the transfer INVITE routed by the MMTelStodTriggerAnchor feature and connects the existing called led to the new calling leg and releases the previous calling leg

Reads STOD tracking information out of the Session Ownership Facility and sets it into the session state for processing by External Session Tracking features.

Source Code

This feature’s source code is available in the Sentinel VoLTE SDK in the mmtel-session-transfer module pack. It can be viewed by using the create-module command in the SDK with that module pack, for example:

> create-module new-session-transfer-module opencloud#mmtel-session-transfer#volte/2.9.0;2.9.0.0

This command will prompt you for information needed to create the new modules, once completed the original source for the feature can be found in the new modules.

The module-pack includes the following modules:

Module Name Description

mmtel-session-transfer

Group module for the feature that includes all of the modules listed below.

mmtel-stod-enabled

checks if the subscriber has the STOD service provisioned

mmtel-stod-enable-session-tracking

Unresolved directive in <stdin> - include::/mnt/ephemeral0/workspace/product/sentinel/sentinel-volte-documentation/release-2.9.0/Auto/volte-documentation/target/generated/sentinel-volte-administration-guide/features/mmtel-features/mmtel-session-transfer/mmtel-stod-enable-session-tracking.adoc[tags=about]

mmtel-bind-aci

connects the IMPU acquired from the subscriber registration to the existing ACI for the session transfer

mmtel-stod-trigger-anchor

handles the transfer request and route it to the previous bound session

mmtel-stod-process-handover

intercepts the transfer INVITE routed by the MMTelStodTriggerAnchor feature and connects the existing called led to the new calling leg and releases the previous calling leg

mmtel-session-transfer-event-handler

The internal event used by the MMTelStodTriggerAnchor feature.

mmtel-stod-determine-target-session

Reads STOD tracking information out of the Session Ownership Facility and sets it into the session state for processing by External Session Tracking features.

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Sentinel VoLTE Version 2.9.0