3G-324M

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3G-324M is the 3GPP umbrella protocol for video telephony in 3G mobile networks.

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The 3G-324M protocol operates over an established circuit switched connection between two communicating peers. 3G-324M is an umbrella specification to enable conversational multimedia communication over Circuit Switched (CS) networks and has been adopted by the 3GPP. 3G-324M is based on the ITU-T H.324 specification for multimedia conferencing over Circuit switched networks. [1] [2] 3G-324M is composed of the following sub-protocols:

The 3G-324M specification using the Circuit switched network allows delay sensitive conversational multimedia services such as:

3G-324M is agnostic to the actual Circuit switched network that uses it. It can run as easily over UMTS as well as TD-SCDMA networks.

3G-324M is a proven[ citation needed ] solution[ promotional language ] for conversational multimedia based services that packet-based wireless networks cannot deliver because of inherent overhead, BER sensitivity,[ clarification needed ] and variant routing delays. 3G-324M operating over a circuit switched channel between two communication peers guarantees the fixed-delay quality of service for multimedia communications. Combining Circuit switched 3G-324M services with packet-based SIP services such as presence can leverage the strength of both networks to enable new types of differentiated and innovative mobile 3G services.

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Codecs

Audio Codec

Video Codec

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References

  1. IMTC Press Coverage Archived 2017-03-31 at the Wayback Machine , International Multimedia Telecommunications Consortium (IMTC), April 1, 2001 to November 16, 2004.
  2. Orr, Eli. News & Analysis: Understanding The 3G-324M Spec, EETimes.com website. January 21, 2003.