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Open Issues in SIP Service Examples Recent Changes. Added 2-party to 3-party conversion Uses a URI to identify the conference and SIP Events Scenarios User is added by participant User requests admission (joins). Open Issues. 2-Party to 3-Party transition

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open issues in sip service examples recent changes
Open Issues in SIP Service ExamplesRecent Changes
  • Added 2-party to 3-party conversion
    • Uses a URI to identify the conference and SIP Events
    • Scenarios
      • User is added by participant
      • User requests admission (joins)

draft-ietf-sipping-service-examples-02.txt

open issues
Open Issues
  • 2-Party to 3-Party transition
    • subscription/interaction between UA and bridge
    • use of Join/Fork?
    • discovery of conference URI
  • Single Line Extension
    • needs more attention
  • To Do:
    • align with latest REFER changes
    • include Conference Package in flow
  • Contact:
    • alan.johnston@wcom.com

draft-ietf-sipping-service-examples-02.txt

slide3
2.9 3-way Conference – Third Party is Added

User A User B Bridge User C

| RTP | | |

|<==============>| | |

|INVITE (hold)/200/ACK | |

|<---------------| | |

| No RTP | INVITE/200/ACK |

| |------------->| |

| | RTP | |

| |<============>| |

| REFER Refer-To:Bridge/202 | |

|<---------------| | |

| INVITE/200/ACK | |

|------------------------------>| |

| RTP | |

|<=============================>| |

| NOTIFY/200 | | |

|--------------->| | |

| BYE/200 | | |

|<---------------| | |

| | REFER Refer-To:C/202 |

| |------------->| |

| | | INVITE/180/200/ACK

| | |------------->|

| | | RTP |

| | NOTIFY/200 |<============>|

| |<-------------| |

draft-ietf-sipping-service-examples-02.txt

slide4
2.10 3-way Conference – Third Party Joins

User A User B Bridge User C

| | | |

| RTP | | INVITE |

|<==============>| |<-------------|

| | | 180 |

| | NOTIFY/200 |------------->|

| |<-------------| |

|INVITE (hold)/200/ACK | |

|<---------------| | |

| No RTP | INVITE/200/ACK |

| |------------->| |

| | RTP | |

| |<============>| 200 OK |

| | |------------->|

| | | ACK |

| | |<-------------|

| | | RTP |

| | NOTIFY/200 |<============>|

| |<-------------| |

| REFER Refer-To:Bridge/202 | |

|<---------------| | |

| INVITE/200/ACK | |

|------------------------------>| |

| RTP | |

|<=============================>| |

| NOTIFY/200 | | |

|--------------->| | |

| BYE/200 | | |

|<---------------| | |

draft-ietf-sipping-service-examples-02.txt