RTP Pause / Resume

RTP Media Stream
Pause / Resume
draft-westerlund-avtext-rtp-stream-pause-05
Bo Burman
IPR Disclosure
› For referred draft-westerlund-avtext-rtp-stream-pause
– http://datatracker.ietf.org/ipr/1641/ (Ericsson)
– https://datatracker.ietf.org/ipr/1935/ (Microsoft)
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 2 (10)
Changes Since -04
› Improved and detailed text on use of the simplified mode
where TMMBR/TMMBN are used for pause and resume
› Editorial improvements
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 3 (10)
Presentation Goal
› Brief recapitulation of the problem
› WG consensus on way forward
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 4 (10)
Pause Problem Overview (1)
M forwards from
B to A and has
no need for C
A
B
M
PAUSE C
C
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 5 (10)
Pause Problem Overview (2)
M forwards from
B to A and has
no need for C
A
B
M
PAUSED C
C
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 6 (10)
Pause Problem Overview (3)
M now needs to
forward from C
to A and has no
need for B
A
M
B
PAUSE B
RESUME C
C
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 7 (10)
Pause Problem Overview (4)
M forwards from
C to A and has
no need for B
A
M
B
PAUSED B
C
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 8 (10)
Two Solution Modes
› Generic
› Supported Topologies
– Any
› Pause = PAUSE
– Delayed media action
– Can be refused
› Paused = PAUSED
› Resume = RESUME
› Refuse = REFUSE
– Both for PAUSE and RESUME
› New SDP signaling
– a=rtcp-fb:* ccm pause
– a=rfcp-fb:* ccm paused
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 9 (10)
› Simplified
› Supported Topologies
– Point-to-point
– Mixer
› Pause = TMMBR 0
– Immediate media action
– Cannot be refused
› Paused = TMMBN 0
› Resume = TMMBR >0
› Refuse = TMMBN 0
– For Resume (TMMBR >0) only
› Existing SDP signaling
– a=rtcp-fb:* ccm tmmbr
Way Forward
› Propose adoption as WG draft
RTP Pause / Resume | IETF 89 - AVTEXT | March 2014 | Page 10 (10)