B.2 Signalling Scenarios

03.663GPPStage 2Support of GSM Mobile Number Portability (MNP)TS

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

1 Note that the TT may have a different value, e.g. TT=17 in the case of CCBS Requests.

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 which may be retrieved from an NP database. The MNP-SRF function then reroutes 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

1 Note that the TT may have a different value, e.g. TT=17 in the case of CCBS Requests.

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 which 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 which may be retrieved from an NP database. 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

1 Note that the TT may have a different value, e.g. TT=17 in the case of CCBS Requests.

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 which 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 which may be retrieved from an NP database. The MNP-SRF function then reroutes the message to HLRB.