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IP Performance Specifications - Progress and Next Steps

IP Performance Specifications - Progress and Next Steps. July 11, 2002 Al Morton. End-to-End IP Network Performance. Growth of real-time/CBR application use on IP nets VoIP, Multi-Media Conferencing, Streaming... New applications require stricter performance.

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IP Performance Specifications - Progress and Next Steps

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  1. IP Performance Specifications -Progress and Next Steps July 11, 2002 Al Morton

  2. End-to-End IP Network Performance • Growth of real-time/CBR application use on IP nets • VoIP, Multi-Media Conferencing, Streaming... • New applications require stricter performance

  3. IP Packet Transfer Specifications

  4. New RFCs Loss Patterns Bulk Transfer Capacity Current I-Ds Packet Reordering Active Meas. Protocol Req. IPPM MIB Newly Chartered Work on Link Bandwidth Capacity Performance Objectives Y.1541 (May 2002), six QoS Classes Suggest QoS Signaling Support/Methods Parameter Revisions Y.1540 (Nov 2002) “other” Packet Transfer MPLS? Evolution of IPPM and Question 6/13

  5. Y.1541 "Provisional IP QoS Classes” • Y.1221-based Traffic Contracts • IP transfer capabilities include: the service model, traffic descriptor, conformance definition and any QOS commitments. • Transfer Capabilities include Dedicated Bandwidth, Statistical Bandwidth, and Best Effort.

  6. Viewpoints of QoS From G.1000, Communications quality of service: A framework and definitions

  7. Elements of Service Provider’s IP QoS View QoS Framework Std IP Perf Parameters Std IP QoS Classes SLAs Objectives Reality Engineering & Implementation QoS Mechanisms Std Active Meas. Sampling Methodologies Passive Monitoring

  8. QoS Agreements - Today and Tomorrow Published Req. Design& Eng. Reqmnts. IS Manager Cooperating Network Request ACK/REJ/Mod Objectives Reality Provisioning QoS Mech. Reports (SLAs) Users Apps

  9. QoS Agreements - Viewed as 3 Entities Network: Published Req. Design& Eng. ... User Requirements IS Manager/ Requirements Objectives Reality Provisioning QoS Mech. Reports (SLAs) Reports Applications Perceived QoS

  10. QoS Agreements - Future User Application Network(s) ... Application Requirements Cnfg.Choices Request ACK/REJ/Mod Request ACK/REJ/Mod QoS Requirements QoS Classes & Decisions Topo/Policy Design/Eng. Objectives Reality Provisioning QoS Mech. Reports (SLAs) Feedback Monitoring Perceived QoS

  11. Next Steps • Define Process and Methods to ACHIEVE e-e Objectives • Begin with Single networks and Static Agreements • Static, with Two or Three Networks • difficult with more networks (see draft M.2301) • Build-in Flexibility (not too much) • Network to Network Signaling for QoS • In the “Oracle” model, each network has an entity with specific knowledge and control capabilities. These entities use a signaling protocol to communicate efficiently across network boundaries (accept/reject/modify requests). • Standardize Delay Variation Definitions • Revisit IP Service Availability Function Definition • Wide range of sensitivities across user applications

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