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Consideration for Selecting RTCP XR Metrics for RTCWEB Statisitcs API

Consideration for Selecting RTCP XR Metrics for RTCWEB Statisitcs API. draft-huang-xrblock-rtcweb-rtcp-xr-metrics-02. Rachel Huang (rachel.huang@huawei.com) Varun Singh( varun@comnet.tkk.fi ) Roni Even ( roni.even@mail01.huawei.com ) Dan Romascanu (dromasca@avaya.com).

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Consideration for Selecting RTCP XR Metrics for RTCWEB Statisitcs API

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  1. Consideration for Selecting RTCP XR Metrics for RTCWEB Statisitcs API draft-huang-xrblock-rtcweb-rtcp-xr-metrics-02 Rachel Huang (rachel.huang@huawei.com) Varun Singh(varun@comnet.tkk.fi) Roni Even (roni.even@mail01.huawei.com) Dan Romascanu (dromasca@avaya.com)

  2. Updates Since Last Version • Adjusting the organization of proposed metrics. • Relatively prevalent metrics are discussed first. • Duplicate packets count is not recommended in this document. • Post-repair packet count metric has been added. • Jitter metrics have been removed. • Updating the references. • Other editorial changes.

  3. Overview • Providing guidelines when selecting additional statistic RTCP XR metrics. • Mainly talking about what kinds of metrics should be used for RTCWEB. • draft-singh-xrblock-webrtc-additional-stats-01 makes a recommendation for a minimum set of metrics from this draft to be currently registered in IANA. • Motivation • WebRTC needs Statistics. • draft-alvestrand-rtcweb-stats-registry registered basic statistic metrics from standard RTCP SR/RR. • Basic statistics from RTCP SR/RR may not be sufficient. • Considerations when selecting metrics • Metrics only collected in the local endpoint. • Metrics could be queried by JS Apps at arbitrary intervals. • 7 kinds of metrics are suggested.

  4. Suggested Metrics • Loss and discard packet count metrics • - Lost packets count [RFC3550], discard packet count [RFC7002]. • discard octets metric • - discarded octets [draft-ietf-xrblock-rtcp-xr-bytes-discarded-metric-00]. • retransmitted and post-repair packet count metrics • - Retransmitted packets count, post-repair loss count [draft-huang-xrblock-post-repair-loss-00]. • frame impairment summary metrics. • - Number of discarded frames, number of fully lost frames, number of partial lost frames [RFC7004] . • Burst/gap pattern metrics for loss and discard • - Number of bursts, number of packets lost in bursts, number of packets discarded in busurs [RFC6958] [RFC7003]. • RLE metrics for loss, discard and post-repair • - RLE metrics for loss [RFC3611], RLE metrics for discard [draft-ietf-xrblock-rtcp-xr-discard-metrics-00], RLE metrics for post-repair [5725]. • jitter buffer metrics • - De-jitter buffer nominal delay, de-jitter buffer maximum delay [RFC7005].

  5. Next Step • Comments and suggestions ? • Need feedback from RTCWEB. • First presented in last meeting and will be proceeded as individual submission for a long time.

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