Patent ID: 8452278
Filing Date: 2013-05-28
Classification: H04Q,H04W

Abstract:
1. A method for facilitating inter-PLMN (Public Land Mobile Network) roaming, comprising: a home PLMN of a caller's wireless communication device determining that the caller's wireless communication device is not located in the home PLMN; facilitating a call routing service in a Service Control Point (SCP) of the home PLMN in response to determining that the caller's wireless communication device is not located in the home PLMN, wherein the call routing service causes a call originated by the caller's wireless communication device while roaming in a visited PLMN to be routed back to a Gateway Mobile Switching Center (GMSC) of the home PLMN thereby allowing the home PLMN to have control over said roaming caller originated call and to have limited dependency on the visited PLMN; and the GMSC of the home PLMN validating a Routing Number (RN) against configured Network Camel Subscription Information (N-CSI) in response to the home PLMN receiving said roaming caller originated call from the visited PLMN, wherein the RN is used for routing said roaming caller originated call from the visited PLMN to the home PLMN; wherein facilitating the call routing service includes: