Application of Application of Loss Metrics to Loss Metrics to - PowerPoint PPT Presentation

Application of Application of Loss Metrics to Loss Metrics to Multimedia Multimedia Streams Streams Nagarjuna Venna Nagarjuna Venna Kaynam Hedayat Kaynam Hedayat IPPM WG IPPM WG November 2006 November 2006

Outline Outline � Need Need � Requirements Requirements � Proposal Proposal � Discussion Discussion Confidential Confidential

The Need The Need � Industry need: Consistent metric for monitoring Industry need: Consistent metric for monitoring media stream performance in IP networks media stream performance in IP networks � Packet level loss metrics based on RFC 3357 are Packet level loss metrics based on RFC 3357 are very useful and simple to understand; they are very useful and simple to understand; they are applicable to media applications applicable to media applications � Need for a clear understanding of the Need for a clear understanding of the applicability applicability Confidential Confidential

Requirements Requirements � Based on current IPPM Metrics Based on current IPPM Metrics � Consistent and predictable � Scalable � Content agnostic Content agnostic � No decoding of content � Based on packet headers � Use in network operation Use in network operation � Meaningful and actionable metrics Confidential Confidential

Proposal Proposal � Problems Problems � Large “Frames” � Multiplexed Media Streams � Specify how to compute metrics Specify how to compute metrics � Media Loss � Media Loss Period and Media Loss Distance � Percent media loss � Complete/Partial media loss � Number of loss events � Noticeable loss events, noticeable loss rate Confidential Confidential

Proposal Proposal % Loss Media % Noticeable Loss Derived Metrics Media Loss Period Complete/Partial media loss Media Loss Distance Number of loss events Noticeable loss events Noticeable loss rate S1 S1 S2 S2 S3 S3 Playout Buffer (application specific) S1 S1 S2 S2 S3 S3 % Loss Media % Noticeable Loss Derived Metrics Media Stream DeMux Complete/Partial media loss (Transport specific) Number of loss events Noticeable loss events Noticeable loss rate Existing Metrics Packet Loss Packet Loss Period/Distance Noticeable Loss IP Packets IP Packe Confidential Confidential

Discussion Discussion � Next Steps… Next Steps… Confidential Confidential