Patent ID: 6920326
Filing Date: 2005-07-19
Classification: H04W

Abstract:
1. In a wireless communication system including a mobile unit having roamed from an originating system to a serving system, the originating system including an originating mobile switching center (MSC) and the serving system including a serving MSC, a method comprising the steps of: receiving, by the serving system from the originating system responsive to registering the mobile unit with the serving MSC, a termination restriction code parameter indicating whether Roamer Access Number (RAN) calls may be terminated at the mobile unit; receiving, by the serving MSC sometime after receiving the termination restriction code parameter, a RAN call request for the mobile unit; and determining, by the serving MSC based on the termination restriction code parameter without requiring further message exchange with the originating system, whether to terminate the RAN call request to the mobile unit, the serving MSC denying termination of the RAN call request to the mobile unit if the termination restriction code parameter indicates that the mobile unit is not permitted to terminate RAN calls while roaming at the serving MSC.