XRBLOCK Yokohama: update to various drafts

Varun Singh, IETF 94, Yokohama

Transcript

1. Updates to various drafts Varun Singh Yokohama, IETF94 05.11.2015
2. RFC6958 http://www.rfc-editor.org/errata_search.php?rfc=6958&eid=4424 • Errata needs to be updated to say: – 12 bits in the packet format is correct and instead the text needs to fixed. • How do I update the errata?
3. Unreported errata: RFC7509 0 1 2 3 4 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | BT=33 | Reserved | Block length = 4 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SSRC of Source | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | begin_seq | end_seq | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Post-repair loss count | Repaired loss count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Block length needs to be set to 3
4. Independent burst-gap-discard • RFC7003 needed to be sent with RFC6958 – A limitation because burst/gap loss and discard assumed to be correlated – Experience shows that they are not in wireless environments • New draft: – https://tools.ietf.org/html/draft-singh-xrblock- independent-burst-gap-discard-01
5. Packet Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | BT=IBGD | I | resv | Block Length = 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SSRC of Source | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Threshold | Sum of Burst Durations (ms) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Packets Discarded in Bursts | Number of | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Bursts | Total Packets Expected in Bursts | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Discard Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ • Number of bursts in the loss report is 12 bits, here 16 bits • Discard count has a separate report. Should it be added here?
6. Extended Report (XR) Metrics for the WebRTC Statistics API • WEBRTC WG at TPAC chose to use the W3C Statistics document as a place to document the statistics. – i.e., will not use an IANA registry – The W3C document will need to have some text on how other SDOs will be able to pick identifiers • This draft creates an registry and assigns names/identifiers.
7. Next Steps • All open issues closed. Name: burstDiscardCount Definition: The cumulative number of bursts of discarded RTP packets, Appendix A (e) of [I-D.singh-xrblock-independent-burst-gap-discard]. [RFC3611] recommends a Gmin (threshold) value of 16 for classifying packet loss or discard burst. • Ready for WGLC.