A mobile device for voice call continuity

摘要

A mobile device having an operating system which includes a communications framework having a voice call continuity convergence layer. The status of the circuit switched and packet switched parts of the network are reported to the convergence layer which decides which part of the network to connect to at call establishment and when to perform a handover based on network availability and pre-stored profiles. Preferably the voice call continuity convergence layer comprises a data flow entity which is arranged to synchronise packet and circuit switched audio data during call transfer.