Method for changing session media, method for establishing a call, and equipment thereof

摘要

A method for changing ICS session media includes: receiving a media type change request comprising a new media type sent from one of a terminal equipment, a mobile switching center (MSC), or a second party; releasing a circuit-switched (CS) call leg based on an original media type between an IMS CS control function (ICCF) and the terminal equipment; establishing a CS call leg based on the new media type between the ICCF and the terminal equipment; and updating the media type of a second call leg between the ICCF and a second party into the new media type or establishing a second call leg based on the new media type between the ICCF and the second party.