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Cross-layer Monitoring in IPTV Network S

“Group 0” Lei Zhang 3421970 Zhenyu Li 3429940 Peng Zhou 3429310 Xiaohang Yin 3434340 Mauricio Barreto 3358630 Nilram Azadpeyma 3371520. Cross-layer Monitoring in IPTV Network S. TELE 9752 – Network Operations & Control Group Presentation Week 12 – S2, 2013. OUTLINE.

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Cross-layer Monitoring in IPTV Network S

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  1. “Group 0” Lei Zhang 3421970 Zhenyu Li 3429940 Peng Zhou 3429310 Xiaohang Yin 3434340 Mauricio Barreto3358630 NilramAzadpeyma 3371520 Cross-layer Monitoring in IPTV NetworkS TELE 9752 – Network Operations & Control Group Presentation Week 12 – S2, 2013

  2. OUTLINE • Introduction • Aims and Challenges - Why • Monitoring Metrics - What • In-network & Client-side Monitoring – How & Where • The ALICANTE Monitoring Approach • Conclusion and Our Opinion

  3. introduction IPTV: Delivery of multimedia content over IP-based networks with guaranteed quality of service – paid service. • Why IPTV business is so attractive? • IPTV must compete with traditional TV delivery systems. • Very high reliability and QoS/QoE.

  4. Introduction content content service service network network IPTV Traditional TV To achieve comparable QoS/QoE IPTV needs: Integrated service & network management Real-time monitoring • Monitoring must cover all layers in all system segments. • Cross-layer monitoring is essential!

  5. aims Even Small Impairments should be detected and mitigated. • Hierarchical structure Figure 1. Typical architecture of an IPTV network. [7] Service Assurance for IPTV

  6. Required Functionalities of an IPTV Monitoring System • Reactive • Response of the monitoring system to an abnormal situation. • Proactive • Behaviour of the monitoring system under normal operation.

  7. Functions of monitoring • Reactive (Fault Management)

  8. Functions of monitoring • Proactive

  9. challenges

  10. Monitoring metrics • Cross-layer Monitoring • Parameters monitored in IPTV network: • User/QoE Metrics • User Perception • Application Metrics • During Decoding and Presentation • Transport/Network Metrics • Performance of the Corresponding Protocols • Other: • Protocol-Specific Metrics • FEC • User Behavior Metrics

  11. In-network monitoring • Within the Distribution Network, Core, Edge, and Access. • Needs to be distinguished from overall network monitoring. • Mainly collects: • Transport/Network Metrics e.g. Packet Loss and Jitter • Packet filtering and sampling is often used due to huge traces. • Retrieval of measured metrics: • SNMP, IPFIX（Avoid overhead of SNMP/syslog) • Modern Routers and Switches • Higher-Layer Metrics • Application/Stream • Probe Modules • Number of Probes: Detection of Issue Vs. Cost and Complexity • Active Monitoring  Imposed Load /Traffic on the Network

  12. Client-side monitoring • Performed at 3 points:

  13. alicante monitoring Figure.Architecture of the ALICANTE monitoring subsystem.［7］

  14. QoS & Qoeof the alicante Maximization of QoS and QoE of media services is achieved. • a) via dynamic adaptation of media streams, taking place in the network and also at the edges. • b) via content-aware mechanisms in the network, performing automatic service recognition and differentiation.

  15. alicante monitoring • Four sets of cross-layer metrics are identified corresponding to different elements: • Key feature: Decentralized Monitoring.

  16. conclusions • Thorough monitoring can only be achieved through cross-layer monitoring. • All domains involved in IPTV service provisioning must be monitored. • The Alicante monitoring approach is a practical implementation of the principles of end to end service monitoring. • Decentralized monitoring allows adaptive management and promotes collaboration among actors and across domains.

  17. our own opinions • Lack of experimental support for ideas presented in paper. The paper is more an opinion piece than a research paper. • Conclusions should include: Use of virtual networks allows data to be shared without exposing commercially sensitive information.

  18. referenceS [1] “IPTV Global Forecast — 2009 to 2013, Semiannual IPTV Global Forecast Report,” Nov. 2009, MRG Group Inc. [2] ITU-T Rec. G.1081, “Performance Monitoring Points for IPTV,” Oct. 2008. [3] L. Boula, H. Koumaras, and A. Kourtis, “An Enhanced IMS Architecture Featuring Cross-Layer Monitoring and Adaptation Mechanisms,” ICAS ’09), Valencia, Spain, Apr. 20–25, 2009. [4] ITU-T Rec. G.1080, “Quality of Experience Requirements for IPTV Services,” Dec. 2008. [5] ITU-T Rec. J.241, “Quality of Service Ranking and Mea- surement Methods for Digital Video Services Delivered over Broadband IP Networks,” Apr. 2005. [6] ETSI TR 101 290 V1.2.1, “Digital Video Broadcasting (DVB); Measurement Guidelines for DVB Systems,” tech. rep., May 2001. [7] BoulaL, Gardikis G, Xilouris G, et al. Cross-layer Monitoring in IPTV Networks[J].

  19. Thank you!

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