Considerations for Selecting RTCP Extended Report (XR) Metrics for the WebRTC Statistics API
draft-ietf-xrblock-rtcweb-rtcp-xr-metrics-06

Document Type Active Internet-Draft (xrblock WG)
Last updated 2017-09-21 (latest revision 2017-07-20)
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XR Block Working Group                                          V. Singh
Internet-Draft                                              callstats.io
Intended status: Standards Track                                R. Huang
Expires: January 21, 2018                                        R. Even
                                                                  Huawei
                                                            D. Romascanu

                                                                 L. Deng
                                                            China Mobile
                                                           July 20, 2017

 Considerations for Selecting RTCP Extended Report (XR) Metrics for the
                         WebRTC Statistics API
              draft-ietf-xrblock-rtcweb-rtcp-xr-metrics-06

Abstract

   This document describes monitoring features related to media streams
   in Web real-time communication (WebRTC).  It provides a list of RTCP
   Sender Report, Receiver Report and Extended Report metrics, which may
   need to be supported by RTP implementations in some diverse
   environments.  It lists a set of identifiers for the WebRTC's
   statistics API.  These identifiers are a set of RTCP SR, RR, and XR
   metrics related to the transport of multimedia flows.

Status of This Memo

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   This Internet-Draft will expire on January 21, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Singh, et al.           Expires January 21, 2018                [Page 1]
Internet-Draft         RTCP XR Metrics for RTCWEB              July 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  RTP Statistics in WebRTC Implementations  . . . . . . . . . .   3
   4.  Considerations for Impact of Measurement Interval . . . . . .   4
   5.  Candidate Metrics . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Network Impact Metrics  . . . . . . . . . . . . . . . . .   5
       5.1.1.  Loss and Discard Packet Count Metric  . . . . . . . .   5
       5.1.2.  Burst/Gap Pattern Metrics for Loss and Discard  . . .   6
       5.1.3.  Run Length Encoded Metrics for Loss, Discard  . . . .   7
     5.2.  Application Impact Metrics  . . . . . . . . . . . . . . .   7
       5.2.1.  Discard Octets Metric . . . . . . . . . . . . . . . .   7
       5.2.2.  Frame Impairment Summary Metrics  . . . . . . . . . .   8
       5.2.3.  Jitter Buffer Metrics . . . . . . . . . . . . . . . .   8
     5.3.  Recovery metrics  . . . . . . . . . . . . . . . . . . . .   9
       5.3.1.  Post-repair Packet Count Metrics  . . . . . . . . . .   9
       5.3.2.  Run Length Encoded Metric for Post-repair . . . . . .   9
   6.  Identifiers from Sender, Receiver, and Extended Report Blocks  10
     6.1.  Cumulative Number of Packets and Octets Sent  . . . . . .  10
     6.2.  Cumulative Number of Packets and Octets Received  . . . .  10
     6.3.  Cumulative Number of Packets Lost . . . . . . . . . . . .  11
     6.4.  Interval Packet Loss and Jitter . . . . . . . . . . . . .  11
     6.5.  Cumulative Number of Packets and Octets Discarded . . . .  11
     6.6.  Cumulative Number of Packets Repaired . . . . . . . . . .  11
     6.7.  Burst Packet Loss and Burst Discards  . . . . . . . . . .  11
     6.8.  Burst/Gap Rates . . . . . . . . . . . . . . . . . . . . .  12
     6.9.  Frame Impairment Metrics  . . . . . . . . . . . . . . . .  12
   7.  Adding new metrics to WebRTC Statistics API . . . . . . . . .  13
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