Considerations for Selecting RTCP Extended Report (XR) Metrics for the RTCWEB Statistics API
draft-ietf-xrblock-rtcweb-rtcp-xr-metrics-00

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XR Block Working Group                                          R. Huang
Internet-Draft                                                   R. Even
Intended status: Standards Track                                  Huawei
Expires: April 12, 2015                                         V. Singh
                                                        Aalto University
                                                            D. Romascanu
                                                                   Avaya
                                                                 L. Deng
                                                            China Mobile
                                                         October 9, 2014

 Considerations for Selecting RTCP Extended Report (XR) Metrics for the
                         RTCWEB Statistics API
              draft-ietf-xrblock-rtcweb-rtcp-xr-metrics-00

Abstract

   This document describes monitoring features related to RTCWEB.  It
   provides a list of RTCP XR metrics, which are useful and may need to
   be supported in some RTCWEB implementations.  It also describes a
   list of additional identifiers for WebRTC's statistics API.  These
   identifiers are a set of RTCP XR metrics related to the transport of
   multimedia flows.

Status of This Memo

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   This Internet-Draft will expire on April 12, 2015.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Huang, et al.            Expires April 12, 2015                 [Page 1]
Internet-Draft         RTCP XR Metrics for RTCWEB           October 2014

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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 . . . . . . . . . . . . . . . . . . . . . .   4
     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  . . . .   6
     5.2.  Application Impact Metrics  . . . . . . . . . . . . . . .   7
       5.2.1.  Discard Octets Metric . . . . . . . . . . . . . . . .   7
       5.2.2.  Frame Impairment Summary Metrics  . . . . . . . . . .   7
       5.2.3.  Jitter Buffer Metrics . . . . . . . . . . . . . . . .   8
     5.3.  Recovery metrics  . . . . . . . . . . . . . . . . . . . .   8
       5.3.1.  Post-repair Packet Count Metrics  . . . . . . . . . .   8
       5.3.2.  Run Length Encoded Metric for Post-repair . . . . . .   9
   6.  Candidate XR Block Metrics for WebRTC Statistics API  . . . .   9
     6.1.  Variables from XR Blocks  . . . . . . . . . . . . . . . .   9
       6.1.1.  Cumulative Number of Packets and Octets Sent  . . . .  10
       6.1.2.  Cumulative Number of Packets and Octets Received  . .  10
       6.1.3.  Cumulative Number of Packets Lost . . . . . . . . . .  10
       6.1.4.  Cumulative Number of Packets and Octets Discarded . .  10
       6.1.5.  Cumulative Number of Packets Repaired . . . . . . . .  10
       6.1.6.  Burst Packet Loss or Discarded  . . . . . . . . . . .  11
       6.1.7.  Frame Impairment Metrics  . . . . . . . . . . . . . .  11
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
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