VIDEO PHONE INTERWORKING METHOD BETWEEN A WCDMA NETWORK AND A CDMA2000 1XEV_DO NETWORK, CONCERNED WITH ENABLING A VIDEO PHONE CALL BETWEEN TWO TERMINALS

摘要

PURPOSE: A video phone interworking method between a WCDMA(Wideband CDMA) network and a CDMA2000 2XEV_DO network is provided to process an H.245 signaling, and to configure a speech path between an H.323 terminal and an H.324M terminal, thereby enabling a video phone call between the two terminals. CONSTITUTION: An H.323 video terminal(110) registers in a GK(Gatekeeper)(126)(201). The GK(126) transmits a confirm message(202). If a video phone is attempted, an admission request with a gatekeeper-routed call signaling is transmitted(203). An H.225 call signaling setup message is transmitted to the GK(126)(205). The GK(126) transmits the H.225 call signaling setup message to an IMG(Interworking Media Gateway)(130)(206). The IMG(130) transmits a setup signalling message to an SG(Signaling Gateway)(128)(207). The SG(128) executes an IAM signal process(208). A CGS(106) attempts a call connection(209), and delivers an ANM message to the SG(128)(210). The SG(128) processes the setup message(211). A speech path is formed between the IMG(130) and the video terminal(110)(212). The IMG(130) negotiates a level for an error recovery(213), and processes a connect message(214). An H.245 signaling is processed(215), and an end-to-end speech path is configured between the video terminal(110) and an H.324M terminal(100)(216).