B.2 Signalling Scenarios

23.0663GPPRelease 17Stage 2Support of Mobile Number Portability (MNP)Technical realizationTS

B.2.1 Non-call Related Signalling Message for a Non-ported Number – Indirect Routeing

Figure B.2.1 shows the MNP-SRF operation for routeing a non-call related signalling message for a non-ported number where the interrogating network is inside the portability domain and indirect routeing is used or the interrogating network is outside the portability domain.

Figure B.2.1: MNP-SRF operation for routeing a non-call related signalling message for a non-ported number where the interrogating network is inside the portability domain and indirect routeing is used or the interrogating network is outside the portability domain

NOTE: that the TT may have a different value, e.g. TT=17 in the case of CCBS Requests and TT=14 in the case of ANSI Routing of SRI_For_Short Message.

The Interrogating Network Entity (INE) submits a non-call related signalling message. 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 non-ported using information that may be retrieved from an NP database. Figure B.2.1 shows an example where the MNP-SRF function then re-routes the message to HLRB.

B.2.2 Non-call Related Signalling Message for a Ported or Non‑ported Number – Direct Routeing

Figure B.2.2 shows the MNP-SRF operation for routeing a non-call related signalling message for a ported or non-ported number where the interrogating network supports direct routeing. If the interrogating network is the subscription network, MNP-SRFA and MNP-SRFB coincide; i.e. the signalling message passes the MNP-SRF only once.

Figure B.2.2: MNP-SRF operation for routeing a non-call related signalling message for a ported or non-ported number where the interrogating network supports direct routeing

NOTE 1: the TT may have a different value, e.g. TT=17 in the case of CCBS Requests and TT=14 in the case of ANSI Routing of SRI_For_Short Message .

NOTE 2: the CdPA may have different values in the GT address and the nature of address fields.

The Interrogating Network Entity (INE) submits a non-call related signalling message. When MNP-SRFA receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies the subscription network using information that may be retrieved from an NP database. The MNP-SRF function then modifies the CdPA according to the rules agreed for the portability domain and routes the message to MNP-SRFB in the subscription network.

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 that may be retrieved from an NP database. Figure B.2.2 shows an example where the MNP-SRF function then re-routes the message to HLRB.

B.2.3 Non-call Related Signalling Message for a Ported Number ‑ Indirect Routeing

Figure B.2.3 shows the MNP-SRF operation for indirectly routeing (i.e. via the number range holder network) a non-call related signalling message for a ported subscriber.

Figure B.2.3: MNP-SRF operation for indirectly routeing (i.e. via the number range holder network) a non-call related signalling message for a ported subscriber

NOTE 1: the TT may have a different value, e.g. TT=17 in the case of CCBS Requests and TT=14 in the case of ANSI Routing of SRI_For_Short Message.

NOTE 2: the CdPA may have different values in the GT address and the nature of address fields.

The Interrogating Network Entity (INE) submits a non-call related signalling message. This message is routed on MSISDN global title to MNP-SRFA in the number range holder network.

When MNP-SRFA receives the message, MNP-SRF operation is triggered. The MNP-SRF functionality analyses the MSISDN in the CdPA and identifies the subscription network using information that may be retrieved from an NP database. The MNP-SRF function then modifies the CdPA according to the rules agreed for the portability domain and routes the message to MNP-SRFB in the subscription network.

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 that may be retrieved from an NP database. Figure B.2.3 shows an example where the MNP-SRF function then re-routes the message to HLRB.