Video Share is an IP Multimedia System (IMS) enabled service for mobile networks that allows users engaged in a circuit switch voice call to add a unidirectional video streaming session over the packet network during the voice call.
In this scenario, the sender can “narrate” over the CS audio connection while both parties view the video.
GSM Association has split the Video Share service definition [1] into 2 distinct phases.
Similar services popped under the names of See What I See, Rich Voice Call, Push-to-Video (P2video or PTV), etc.
The GSMA Video Share service [1] was originally defined, implemented and tested during the Session Initiation Protocol (SIP) trials conducted by the GSM Association in 2005/2006.
Phase 1 of the Video Share project built on and leveraged the results from the SIP trials.
The Phase 1 Video Share architecture does not include an Application Server, i.e. media is transferred directly between the terminals.
The Video Share service uses the standard IMS Core infrastructure to transmit signaling and media traffic.
IP Packet Exchange (IPX) proxies may be part of this infrastructure to allow interconnection between operators and to provide a collection point for session accounting records used for inter-operator traffic charging.
VS-compliant handsets contain an ISIM/USIM properly provisioned with IMS public/private identities and access credentials.
Functionality supported by a GSMA Video Share Client includes: The Video Share Application Server is an IMS Application Server that interfaces with the S-CSCF network element in the IMS network through the 3GPP-defined ISC interface.
The Video Share Application Server typically runs on a carrier grade fault tolerant hardware platform.
The Video Share session is initiated by sending a SIP INVITE message to the called party.