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Content for  TS 23.072  Word version:  18.0.0

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5  Messages and their Contentsp. 6

5.1  Messages between the MS and the MSCp. 6

5.1.1  CD Requestp. 6

The CD Request message is sent from the MS to MSC direction.
Information element name Required Description
Deflected-to numberMNumber of the C subscriber as entered by the served subscriber.
Deflected-to subaddressCSubaddress of the C subscriber; shall be present if it was entered by the served subscriber; otherwise shall be absent
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5.1.2  CD Request ackp. 7

The CD Request ack message is sent from the MSC to MS direction. This message contains no information elements.

5.1.3  CD Request negative responsep. 7

CD Request negative response message is sent from the MSC to MS direction. The negative response information element can take the following values:
  • service not subscribed;
  • deflected-to number is own number;
  • deflected-to number is a special service code;
  • number invalid;
  • call barred;
  • SS incompatibility;
  • forwarding violation;
  • forwarding failure.

5.2  Messages between the MSC and the VLRp. 7

5.2.1  Process Call Waiting negative responsep. 7

For the description of the Process Call Waiting negative response message refer to TS 23.018. The negative response information element can take the following additional value:
  • Call Deflection.
For the purpose of the CD supplementary service the following additional information elements for the Process Call Waiting negative response message are required.
Information element name Required Description
Deflected-to numberMNumber of the C subscriber as entered by the served subscriber.
Deflected-to subaddressCSubaddress of the C subscriber; shall be present if it was entered by the served subscriber; otherwise shall be absent
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5.2.2  Complete Call negative responsep. 7

For the description of the Complete Call negative response message refer to TS 23.018. The negative response information element can take the following additional value:
  • Call Deflection.
For the purpose of the CD supplementary service the following additional information elements for the Complete Call negative response message are required.
Information element name Required Description
Deflected-to numberMNumber of the C subscriber as entered by the served subscriber.
Deflected-to subaddressCSubaddress of the C subscriber; shall be present if it was entered by the served subscriber; otherwise shall be absent
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5.2.3  Send Info for Incoming Call negative responsep. 8

For the description of the Send Info for Incoming Call negative response message refer to TS 23.018. The negative response information element can take the following additional values:
  • service not subscribed;
  • deflected-to number is own number;
  • deflected-to number is a special service code;
  • number invalid;
  • call barred.

6  Functions of the serving MSCp. 8

The functions of the serving MSC are specified in TS 23.018. The procedures specific to the CD supplementary service are specified in this clause.

6.1  Procedure Handling_CD_MSCp. 8

This procedure is called when a CD request is received from the MS.

6.2  Procedure CD_Rejectp. 8

This procedure is called if the CD request was treated unsuccessful in the VLR.

6.3  Procedure CD_Failurep. 8

This procedure is called if the CD request was treated unsuccessful in the serving MSC.

6.4  Procedure CD_UUS_Interactionp. 8

This procedure is called if the CD request was treated unsuccessful in the serving MSC due to the interaction with the UUS supplementary service.

6.5  Procedure CD_Successp. 8

This procedure is called if the CD request was treated successful in the serving MSC.

6.6  Procedure CD_Notify_SS_Invocationp. 8

This procedure is called by the procedures CD_OR_Clear and CD_Success to send notification of the CD invocation to the gsmSCF if required.
The output signal SS Invocation Notify is sent if the SS-CSI was received in the SIFIC ack. The SS-CSI will only be included in the SIFIC ack if there is a requirement to notify the gsmSCF that CD has been invoked.
Copy of original 3GPP image for 3GPP TS 23.072, Fig. 6.1: Procedure Handling_CD_MSC
Figure 6.1: Procedure Handling_CD_MSC
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.072, Fig. 6.2: Procedure CD_Reject
Figure 6.2: Procedure CD_Reject
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.072, Fig. 6.3: Procedure CD_Failure
Figure 6.3: Procedure CD_Failure
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.072, Fig. 6.4: Procedure CD_UUS_Interaction
Figure 6.4: Procedure CD_UUS_Interaction
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.072, Fig. 6.5: Procedure CD_Success
Figure 6.5: Procedure CD_Success
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.072, Fig. 6.6: Procedure CD_Notify_SS_Invocation
Figure 6.6: Procedure CD_Notify_SS_Invocation
(⇒ copy of original 3GPP image)
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