3 Definitions and abbreviations

29.199-203GPPOpen Service Access (OSA)Parlay X web servicesPart 20: Multimedia multicast session managementTS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and in 3GPP TS 29.199-1 [6] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].

Multicast joining: The process by which a user joins a multicast group.

Multicast session: The group for providing the same multicast service. The end user joins the multicast session to become the member of the multicast session.

Multicast service: A unidirectional point-to-multipoint service in which data is efficiently transmitted from a single source to a multicast group in the associated multicast service area. Multicast services can only be received by such members that are subscribed to the specific multicast service and have joined the multicast group associated with the specific service.

Member: The user becomes a member of a multicast group after he/she joined to the multicast group.

Channel presence information: Consists of a set of attributes that characterize a multicast session such as user identifiers and the multicast session in which they are participating.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TS 29.199-1 [6] apply.

BM-SC Broadcast Multicast Service Centre

GGSN Gateway GPRS Support Node

IPTV Internet Protocol Television

MBMS Multimedia Broadcast/Multicast Service

SGSN Serving GPRS Support Node