Enabling Quality Architectures in the Infrastructure. John Warner Strategic Product Marketing Texas Instruments

Transcription

1 Enabling Quality Architectures in the Infrastructure John Warner Strategic Product Marketing Texas Instruments

2 Agenda Why do we need it? End Points Probes What protocols are used? Where does it fit? Are there deployment issues? What role is TI playing?

3 QoS & Diffserve Multiple methods of providing priority for one user or type of connection over another exist in today s IP networks These methods provide some prioritization and ensure some level of differentiation of services but they don t go far enough to ensure superior voice quality and reliability This is highlighted by the deployment of many quality assurance measuring and monitoring solutions in today s service provider networks

4 End Points Gateway Mobile PSTN Gateway Gateway Phone Packet PBX End Point Office PC Broadband Modem/ Router Phone

5 Probes Passive Passive Active Port Mirroring Inline Insertion Simulated Transaction Probe Switch/Router Active Probe Probe Switch Switch Gateway Switch Gateway Gateway Phone Phone Phone Active Probe

6 The Protocols RTCP-XR Voice quality statistics RTCP-HR Higher resolution voice quality statistics RTSP Allows streaming of diagnostics SIP Session Initiation Protocol extended to include end of call quality statistics H.248 Alternative to both RTCP-XR/HR and SIP for reporting of quality metrics

7 RTCP-XR Statistics Summary Report Block OVERHEAD Lost Packets Duplicate Packets Minimum Jitter Maximum Jitter Mean Jitter Jitter Standard Deviation Min TTL Max TTL Mean TTL TTL STD

8 RTCP-XR VoIP Metrics Report Block OVERHEAD Loss Rate Discard Rate Burst Density Gap Density Burst Duration Gap Duration Round Trip Delay End System Delay Signal Level Noise Level RERL Gmin R Factor ext. R Factor MOS-LQ MOS-CQ RX Config reserved Jitter Buffer Nominal Jitter Buffer Maximum Jitter Buffer Absolute Max

9 Markov Model Jitter buffer Arriving packets Loss events 4-state Markov Model Gather detailed packet loss info in real time Discarded CODEC Discard events Analog metrics Metrics calculation MOS-LQ MOS-CQ MOS-PQ R User R Burst statistics Diagnostic data

10 RTCP-HR High Resolution Metrics Loss Proportion Discard Proportion Number of Frames Expected Basic Loss/ Discard Sub-Block Threshold Burst Duration (ms) Gap Duration (ms) Burst Loss/Discard Proportion Gap Loss/Discard Proportion Burst/Gap Metrics Sub-Block

11 RTCP-HR High Resolution Metrics On Time Playout Duration On Time Active Speech Playout Duration Loss Concealment Duration Buffer Adjustment Concealment Duration Unimpaired Seconds Concealed Seconds Severely Concealed Seconds reserved Threshold Playout Metrics Sub-Block

12 RTCP-HR High Resolution Metrics Round Trip Delay End System Delay External Delay Mean PDV Positive Threshold PDV Positive PDV Percentile Negative Threshold PDV Negative PDV Percentile JB Config JB Metric Jitter Buffer Nominal Jitter Buffer Maximum Jitter Buffer Absolute Max Delay and Packet Delay Variation (PDV) Metrics Sub-Block

13 RTCP-HR High Resolution Metrics R-LQ R-CQ MOS-LQ MOS-CQ R-LQ Ext In R-LQ Ext Out RFC3550 Payload Media Type RxSigLev (IP) RxNoiseLev (IP) Local RERL Remote RERL RxSigLev (Ext) RxNoiseLev(Ext) Metric Status Call Quality Metrics Sub-Block

14 RTCP-HR High Resolution Metrics Vendor ID Vendor ID Src Manuf Code Src Extension Block Length Vendor Specific Extension Data Vendor Specific Metrics Sub-Block

15 to Quality Probe Packet RTCP-XR RTCP-XR SIP Voice Quality Records (End of Call) Manager Quality Assurance Manager

16 to POTS Quality Probe RTCP-XR RTCP-XR Packet Manager SIP Voice Quality Record (End of Call) PSTN Quality Assurance Manager POTS Phone

17 to Mobile Phone Quality Probe RTCP-XR RTCP-XR Packet Manager SIP Voice Quality Record (End of Call) Mobile Quality Assurance Manager

18 Mobile Phone to POTS Packet Quality Probe Mobile Phone Mobile RTCP-XR RTCP-XR PSTN SIP Voice Quality Records (End of Call) POTS Phone Manager Quality Assurance Manager

19 Clouds Regulatory clouds and business issues are likely to play a factor in any wide scale deployments. What is considered private? Will carriers allow quality statistics to leave their networks? Other issues?

20 How is TI Participating in this Effort? Quality Probe Packet RTCP-XR + RTCP-XR + SIP Voice Quality Records (End of Call) + Manager Quality Assurance Manager

21 Enabling Quality Architectures in the Infrastructure THANK YOU John Warner Strategic Product Marketing Texas Instruments