Considerations for Selecting RTCP Extended Report (XR) Metrics for the WebRTC Statistics API
draft-ietf-xrblock-rtcweb-rtcp-xr-metrics-10

Document Type Active Internet-Draft (xrblock WG)
Last updated 2018-07-10 (latest revision 2018-05-25)
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XR Block Working Group                                          V. Singh
Internet-Draft                                              callstats.io
Intended status: Informational                                  R. Huang
Expires: November 26, 2018                                       R. Even
                                                                  Huawei
                                                            D. Romascanu
                                                              Individual
                                                                 L. Deng
                                                            China Mobile
                                                            May 25, 2018

                                    
                                    
                                    

 Considerations for Selecting RTCP Extended Report (XR) Metrics for the
                         WebRTC Statistics API
              draft-ietf-xrblock-rtcweb-rtcp-xr-metrics-10

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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Copyright Notice
 

Singh, et al.          Expires November 26, 2018                [Page 1]
Internet-Draft         RTCP XR Metrics for RTCWEB           May 25, 2018

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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
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