INTERNET PROTOCOL TELEPHONY FOR A MOBILE STATION ON A PACKET DATA CHANNEL

摘要

A method and apparatus are provided for effectuating voice communication between a mobile station (130) and a mobile radio network. A gateway (100) to the mobile radio network receives (300) an incoming voice call for a destination mobile station (130) and accesses (310, 315) information pertaining the status and location of the destination mobile station (130). A determination is made (320) as to whether the destination mobile station is (130) capable of operation in a voice mode using circuit-switched communications across a traffic channel. If the destination mobile station (130) is operable in the voice mode, a circuit-switched communication on a traffic channel is established (330) between the mobile radio network and the destination mobile station (130). Otherwise, the incoming voice call is routed (340) to a voice gateway (200) which converts the voice call to data packets and routes the data packets to the mobile station (130) across an Internet Protocol communication network (190) to a packet gateway (210) of the mobile radio network. The packet gateway (210) routes the call across a packet data channel of the mobile radio network to the destination mobile station (130) using a packet data service.