Patent ID: 8032137
Filing Date: 2011-10-04
Classification: H04W

Abstract:
1. A method of registering a multimode mobile station in a telecommunications system, wherein the telecommunications system comprises a home location register for maintaining mobile subscriber data and supports a first network and a second network of a different type, the method comprising: in the home location register, maintaining the mobile subscriber data and receiving, from another network element, a message for requesting the mobile subscriber data, the mobile subscriber data comprising address information for accessing the mobile subscriber via the first and the second network of the different type; the home location register maintaining a subscriber-specific access parameter which indicates, independently of the address information, whether the mobile subscriber has access rights to the first network and/or the second network of the different type; wherein the first network and second network are provided by a common operator; and in response to said message for requesting the mobile subscriber data, the home location register sends the mobile subscriber data and also said subscriber-specific access parameter; wherein the network element that requested the mobile subscriber data is operable to use said subscriber-specific access parameter for restricting the location updating of the mobile station only to the first network or to the second network of the different type.