Patent ID: 6138006
Filing Date: 2000-10-24
Classification: H04M,H04W

Abstract:
In a radio telecommunications network, a method of informing a called mobile station operating in a visited mobile switching center (V-MSC) that an incoming call is a collect call prior to delivering the incoming call to the mobile station, said method comprising the steps of:determining in an originating mobile switching center (0-MSC) that the incoming call is a collect call;notifying the V-MSC that there is an incoming call for the mobile station, and the incoming call is a collect call, by:generating a collect call indication (CCI) in said 0-MSC:including the CCI and a calling number in a Location Request (LocReq) Invoke message from said 0-MSC to a home location register (HLR); andincluding the CCI and the calling number in a Routing Request (RoutReq) Invoke message from said HLR to said V-MSC,determining the mobile station type;sending an indication according to the mobile station type to the mobile station that the incoming call is about to be delivered, and the incoming call is a collect call; anddelivering the incoming call to the mobile station.