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Conferencing Status in 3GPP SA3-LI. August 25 2008 Jean Trakinat Selvam Rengasami TrideaWorks Consultants to CALEA Implementation Unit Technical Program Section (TPS). AGENDA. Background for Conferencing Included Capabilities in 3GPP TS 33.107 Ongoing work.

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conferencing status in 3gpp sa3 li

Conferencing Status in 3GPP SA3-LI

August 25 2008

Jean Trakinat

Selvam Rengasami

TrideaWorks

Consultants to CALEA Implementation Unit

Technical Program Section (TPS)

agenda
AGENDA
  • Background for Conferencing
  • Included Capabilities in 3GPP TS 33.107
  • Ongoing work
conferencing background
Law Enforcement initial conferencing requirements White Paper submitted to 3GPP SA3-LI in 2Q 2005

Conferencing Feature defined in 3GPP TS 24.147

Based on SIP for call related interactions

Some capabilities based on other protocols (e.g., Binary Floor Control Protocol)

Ongoing SA3-LI work focused on updating 3GPP TS 33.107

CR agreed in April 2008 to provide Stage 2 description of capabilities related to conferencing

Conferencing Background
centralized conferencing general architecture
Centralized ConferencingGeneral Architecture

Access

Switch

Bob

Packet

Network

Ted

Alice

MRFC

Access

Switch

Access

Switch

MRFP

Access

Switch

DF

Three Scenarios Supported

Carol is Subject and creates the Conference

Carol is Subject and Bob creates the Conference

Carol –Conference is the Subject (Conference Circuit is the Subject)

CF

Carol

MRFC – Media Resource Function Controller

MRFP – Media Resource Function Processor

major scenarios addressed
Case A - Interception of Conference Calls associated with or owned by the User who is the subject of interception

Case B - Interception of a Conference in which the subject is a participant

Case C - Interception of a Conference that itself is the subject of interception

Major Scenarios Addressed
iri for conferencing
Interception Related Information (IRI) Events

Creation, Modification, and Destruction of Conference

Start of Conference

End of Conference

Parties Joining a Conference

Parties Leaving a Conference

Events reported and the level of information reported for a given event varies according to the cases mentioned earlier.

IRI for Conferencing
communications content cc related events for conferencing
Interception of CC for all three conferencing cases

Additionally in Case A, interception of CC for a conference held by the interception subject

Binary Floor Control Events – considered for further study pending further work by other parts of 3GPP on the protocol work

Communications Content (CC) Related Events for Conferencing
summary
Summary
  • SA3-LI needs to define a Stage 3 for interception of Conferencing
    • Updates for 3GPP TS 33.108
  • Based on progress and development in other parts of 3GPP, SA3-LI will consider updates to the Conferencing work as necessary to ensure LI is appropriately defined