METHODS, SYSTEMS, AND COMPUTER READABLE MEDIA FOR VALIDATING A VISITOR LOCATION REGISTER (VLR) USING A SIGNALING SYSTEM NO. 7 (SS7) SIGNAL TRANSFER POINT (STP)

摘要

A method includes maintaining a VLR validation database accessible by an SS7 STP and receiving, by the STP, a MAP SAI request message. The method also includes determining that the MAP SAI request message includes a VLR identifier not recorded in the VLR validation database accessible by the STP and recording the VLR identifier in the VLR validation database. The method further includes receiving a first MAP LU request message and detecting a VLR identifier in the first MAP LU request message and determining that the VLR identifier read from the first MAP LU request message does not match the VLR identifier recorded for a subscriber in the VLR validation database. In response to determining that the VLR identifier does not match the VLR identifier recorded for the subscriber in the VLR validation database, the first MAP LU request message is rejected.