Patent ID: 8750839

Claim:
One or more non-transitory computer-readable media having computer-executable instructions embodied thereon for performing a method of accessing an application service from a mobile access terminal (MAT) via an internet protocol multimedia subsystem (IMS) network associated with a service provider, the method comprising: starting an application-service client on the MAT, the application-service client comprising a client program that communicates with an application server to facilitate access to an application service located in the application server; invoking a local Call Session Control Function (CSCF) server on the MAT, the local CSCF server comprising one or more features of a Serving Call Session Control Function (S-CSCF), the local CSCF server interacts, according to a predetermined relationship, with an S-CSCF hosted by the IMS network to facilitate access to the application service by the MAT, wherein the predetermined relationship is determined in advance based on a specification of the MAT that defines the one or more features of the S-CSCF executable on the MAT; creating a local control interface on the MAT, the local control interface comprising one or more features of an IMS Service Control (ISC) interface, wherein the local control interface facilitates interaction between the local CSCF server and the application-service client; and interacting with the S-CSCF associated with the IMS network to facilitate access to the application service.