The Telecom Protocols

For call related message, there are two type of solutions defined for portability Domain: A. Mobile Number Portability-Signaling Relay Function (MNP- SRF): it is based solution acts on SCCP addressing and also makes use of NP database. B. IN- Related Solution : IN based solution allows the MSCs to retrieve routing information from NPDB. A. Mobile Number Portability-Signaling Relay Function (MNP- SRF) Scenarios: Figure-  Call related case - Signalling Relay Function (SRF) solution Call A.1 : Call to a non-ported number : Fig 1:  Call to a non-ported number  From an Originating Exchange a call is set up to MSISDN. The call is routed to the subscription network being the number range holder network, if the number is non-ported. When GMSCa receives the ISUP IAM, , it requests routing information by submitting a MAP SRI to the MNP_SRF/MATF.  When the MNP_SRF/MATF receives the message, the MNP_SRF/MATF analyse...

Mobile Number Portability (MNP): Mobile Number Portability (MNP) is the ability for a UMTS or GSM mobile subscriber to change the subscription network within a portability domain while retaining her original MSISDN. Fig 1: General Architecture of Portability for Calls  Few Definitions to understand the MNP feature:  Number Range Holder Network (NRHN):  The Network to which number range containing the ported number has been allocated.  For Example if a number which is in process of porting is belongs to Vodafone network, then the Vodafone treated as Number Range Holder Network (NRHN).  Donor Network : A subscription network from which a number is ported-out in porting process. This may or may not be the Number range holder network.  For example if a subscriber is ported-out from Vodafone to Airtel, then Vodafone  network if called as Donor network. If this number range belongs...