Description

Feature script name

CallForwardingDetection

Applicable contexts

SS7 service

SAS Support

No

Prerequisite Features

ClassifyCallScenario

The CallForwardingDetection feature analyses an MT initialdp to determine if early call forwarding applies for this call. If call forwarding is pending, the call will be allowed to continue with no charging or monitoring of the call.

This feature prevents an unnecessary credit check with the OCS and unnecessary monitoring of the call when the outcome is already determined.

IF initialdp.gsm-forwardingPending is set AND initialdp.gsm-forwardingPending is true THEN
   instruct call to continue with no monitoring and no charging.
ELSE
   allow the call to proceed without any affect from this feature
ENDIF
If the SessionType of the call is not MobileTerminating then this feature must end without affecting the call.

Session state inputs and outputs

Inputs

Name Type Format Description Behaviour if null/invalid

InitialDPArg

com.opencloud.slee.resources.cgin.callcontrol.CCInitialDPArg

InitialDP which triggered this session.

If CAP1, the call is not eligible for forwarding detection. If CAP2 or higher, it is eligible.

Report featureCannotStart, featureHasFinished

CallType

com.opencloud.sentinel.common.CallType

One of: MobileOriginating, MobileTerminating, MobileForwarded, NetworkInitiated, EmergencyCall

Session type of this call — if MobileTerminating, the call is eligible for call forwarding detection

Assume eligibility for call forwarding detection

Outputs

This feature does not write to session state.

Feature responses

Response Reason

doNotMonitorSession

if call is a MT call and hasGsm_ForwardingPending is set

doNotChargeSession

if call is a MT call and hasGsm_ForwardingPending is set

featureHasFinished

feature has finished

Interaction with call forwarding supplementary service

The gsm-forwardingPending indicator will be present when the GMSC has determined one of the following applies:

  • unconditional call forwarding or conditional call forwarding not

  • call forwarding not reachable — MS switched off

  • call forwarding not reachable — no paging response.

For more information, see Noldus 4.3.2.1 Early Call Forwarding. (Refer to Noldus footnote below.)

OCS interface

No interaction with OCS from this feature except via MFC.

Triggers and application contexts

Application Contexts:

  • cap-v2-gsmSSF-to-gsmSCF-AC

  • capssf_scfGenericAC (CAP3)

The InitialDP will be triggered on DP12 (Terminating_ Attempt_Authorized).

Configuration

This feature is not configurable.

Provisioning interfaces

This feature has no provisioning interfaces.

NOLDUS

CAMEL INTELLIGENT NETWORKS FOR THE GSM, GPRS AND UMTS NETWORK

Rogier Noldus

2006

John Wiley & Sons, Ltd
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