Communication system switching means and method for setting-up calls of different types between a call originating subscriber and a mobile subscriber of a mobile radio communication network

摘要

The invention relates to a setting-up of calls of different types between a subscriber and a mobile subscriber of a mobile radio communication network. The subscriber can initiate calls of different types by specifying compatibility information in the call set-up request and a home location register (HLR) in the mobile radio communication network (PLMN) obtains all attributes of the mobile bearer capability needed for any specific type of call in the PLMN, even if the compatibility information is filtered due to the transfer of the call set-up request through the network protocols. Instead of having to remember a plurality of numbers for a plurality of different types of calls, the subscriber may only use one single number and the compatibility information to specify the entire requirements of bearer capabilities necessary to support the call in the PLMN. Instead of using the conventional multiple-numbering scheme, the invention regenerates missing bearer capability attributes by using a contour selection matching process.