Author_Institution :
Dilithium Networks, Lankspur, CA, USA
Abstract :
As mobile operators worldwide migrate to third-generation (3G) networks, conversational video-telephony services are becoming a key differentiator between new 3G offerings and existing 2G/2.5G services. Although it´s possible to have limited video-based services - such as a multimedia messaging service - that deliver pictures and video clips over 2.5G services, these are delay-insensitive applications that could run over a packet-based wireless network like general packet radio service (GPRS) or code division multiple access (CDMA)´s 1XRTT. For delay-sensitive applications such as conversational video telephony, present 3G packet bearers are inadequate, and the Third Generation Partnership Project (3GPP; http://www.3gpp.org) mandates using the 3G bandwidth-guaranteed circuit-switched bearer and the 3G-324M system. The 3G-324M system is a derivative of the International Telecommunication Union (ITU) H.324 protocol standard for low-bitrate multimedia communication, which ITU-T developed for the public switched telephone network (PSTN). This article describes the 3G-324M system, which has been adopted by both 3GPP and 3GPP2 (htpp://www.3gpp2.org), as well as its H.324 roots.
Keywords :
3G mobile communication; code division multiple access; electronic messaging; multimedia communication; packet radio networks; packet switching; switching networks; telephone networks; videotelephony; 1XRTT; 2G/2.5G services; 3G bandwidth-guaranteed circuit-switched bearer; 3G packet bearers; 3G-324M protocol; 3G-324M system; CDMA; International Telecommunication Union H.324 protocol; code division multiple access; conversational video telephony; delay-insensitive applications; general packet radio service; low-bitrate multimedia communication; mobile operators; multimedia messaging service; packet-based wireless network; public switched telephone network; third-generation networks; video-based services; Circuits; Communication standards; Delay; Ground penetrating radar; Message service; Multiaccess communication; Packet radio networks; Protocols; Telephony; Wireless networks;
