Patent ID: 7680498
Filing Date: 2010-03-16
Classification: H04Q

Abstract:
1. A method of backward-signaling of a transmission service to be used, for setting up a call from a telecommunication network, comprising: calling, from the telecommunication network, a mobile terminal in a service area of a destination mobile switching center in a digital mobile radio network via an access mobile switching center; sending an initial Bearer Capability from the destination mobile switching center to the mobile terminal; negotiating, between the mobile terminal and the destination mobile switching center, information describing the transmission service to be used for the call so as to revise the initial Bearer Capability and determine a revised Bearer Capability; converting the revised Bearer Capability at the destination mobile switching center, the revised Bearer Capability being converted into an Integrated Services Digital Network (ISDN) User Part (ISUP)-compliant (ISDN-BC) information element; and transporting the Integrated Services Digital Network (ISDN) User Part (ISUP)-compliant (ISDN-BC) information element from the destination mobile switching center to the access mobile switching center using at least one ISUP message wherein the telecommunication network is an ISDN, a Public Switched Telephone Network (PSTN), or a Public Land Mobile Network (PLMN), and wherein call setup is not completed until after the Integrated Services Digital Network (ISDN) User Part (ISUP)-compliant (ISDN-BC) information element is transported to the access mobile switching center.