Content for  TS 23.066  Word version:  18.0.0

Figure B.4.7 shows the MNP-SRF operation for routeing an Any_Time_Interrogation message for a ported number where the interrogating network does not support direct routeing. The message flows for this scenario are based on the use of an SCCP-relay function in the MNP-SRFs. If the MNP-SRFs use a higher-level relay function (e.g. TC-relay), then the response message will go via the MNP-SRF as shown in clause B.4.2. For further details of the signalling relay functions, the reader is referred to [7].

1. The gsmSCF generates an Any_Time_Interrogation (ATI) message. The message is routed to the number range holder network's MNP-SRF.
2. When MNP-SRFB' receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies the MSISDN as being ported using information which may be retrieved from an NP database. As the message is non-call related, the MNP-SRF function then populates the CdPA with either a routeing number or a concatenation of a routeing number and MSISDN. After modifying the CdPA, the message is routed to MNP-SRFB in the subscription network.
3. When MNP-SRFB receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies the MSISDN as being ported into the network using information which may be retrieved from an NP database. The MNP-SRF function then populates the CdPA with an HLRB address. After modifying the CdPA, the message is routed to HLRB.
4. HLRB responds to the ATI by sending back an ATI ack with the requested information.

Figure B.4.8 shows the MNP-SRF operation for routeing an Any_Time_Interrogation message for a ported number where the interrogating network supports direct routeing. The message flows for this scenario are based on the use of an SCCP-relay function in the MNP-SRF. If the MNP-SRF uses a higher-level relay function (e.g. TC-relay), then the response message will go via the MNP-SRF as shown in clause B.4.2. For further details of the signalling relay functions, the reader is referred to [7].

1. The gsmSCF generates an Any_Time_Interrogation (ATI) message. The message is routed to the network's MNP-SRF.
2. When MNP-SRFB receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies the MSISDN as being ported into the network using information which may be retrieved from an NP database. The MNP-SRF function then populates the CdPA with an HLRB address. After modifying the CdPA, the message is routed to HLRB.
3. HLRB responds to the ATI by sending back an ATI ack with the requested information.

Figure B.4.9 shows the MNP-SRF operation for routeing a CCBS Request for a ported number where the interrogating network supports direct routeing. The message flows for this scenario are based on the use of an SCCP-relay function in the MNP-SRFs. If the MNP-SRFs use a higher-level relay function (e.g. TC-relay), then the response message will go via the MNP-SRF as shown in clause B.4.2. For further details of the signalling relay functions, the reader is referred to [7].

1. The VMSCA receives a ISUP Release message with cause value 'subscriber busy' from VMSCB.
2. VLRA/VMSCA sends a Register_CC_Entry to HLRA using the HLRA address as CdPA on SCCP.
3. The HLRA sends a CCBS Request message to the networks MNP-SRFA.
4. When MNP-SRFA receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies the MSISDN as being ported using information which may be retrieved from an NP database. As the message is non-call related, the MNP-SRF function then populates the CdPA with either a routeing number or a concatenation of a routeing number and MSISDN. After modifying the CdPA, the message is routed to MNP-SRFB in the subscription network.
5. When MNP-SRFB receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies the MSISDN as being ported into the network using information which may be retrieved from an NP database. The MNP-SRF function then populates the CdPA with an HLRB address. After modifying the CdPA, the message is routed to HLRB.
6. HLRB can now respond to HLRA by sending back a CCBS ack message.

Figure B.4.10 shows the MNP-SRF operation for delivering an CNAP message to an ANSI Calling Name Database.

1. An incoming call: an Initial Address message with Generic Name parameter set to "presentation allowed" is received at a MSC. The MSC inteerogates the VLR to determine if the called party is subscribed to the CNAP service. The VLR Response indicates that the called party is subscribed to CNAP;
2. The MSC generates a TCAP message "Query With Permission". The Query With Permission message is routed to the network's MNP-SRF;
3. When MNP-SRFB receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies which CNDB the MSISDN is populated using information which may be retrieved from an NP database. The MNP-SRF function then populates the CdPA with an CNDB address. After modifying the CdPA, the message is routed to CNDB;
4. CNDB responds to the routeing enquiry by sending back a Query With Permission ack with the address of the MSC. The MSC can now deliver the Calling Name to the terminating subscriber.