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G.8265.1 (PTPprofileFrequency) - PowerPoint PPT Presentation


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Overview of Q13 recommendations. G.8260 (Definition). Definitions / terminology. Agreed. Ongoing. G.8260 AppI ( metrics ). Frequency: G.826x. Time/Phase:G.827x. G.8261. G.8271. Basics. SyncE Jitter-Wander: ( Included in G.8261). G.8271.1 (Network limits_time/phase.

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Presentation Transcript
slide1

Overview of Q13 recommendations

G.8260 (Definition)

Definitions /terminology

Agreed

Ongoing

G.8260 AppI

(metrics)

Frequency: G.826x

Time/Phase:G.827x

G.8261

G.8271

Basics

SyncE Jitter-Wander: (Included in G.8261)

G.8271.1(Network limits_time/phase

Network requirements

G.8261.1(NetwkPDV_frequency)

G.8271.2(profile2)

73.1 GM

G.8262 (SyncE)

G.8272PRTC

73.2 BC

Clock

G.8273

G.8263

(slave clock)

73.3 TC

73. x,y,z

G.8264(SyncE-architecture-SSM)

Methods

G.8275(architecture-time)

G.8265(architecture-Frequency)

G.8265.1(PTPprofileFrequency)

G.8275.1(PTPprofile1Time/phase)

Profiles

G.8275.2(PTPprofile2Time/phase )

G.8265.m(PTP Profile frequency m)

1

G.supp

summary of the synchronization sessions 1
Summary of the Synchronization sessions -1
  • IEEE 1588 Revision
    • Fix existing problems, remove inconsistancies
    • Improve accuracy, security, configuration and MIBs
    • Layered architecture, but backwards compatible
    • Backward compatibility is very important for operators
  • IEEE 802.1AS Revision
    • Additional link types, link aggregation
    • Redundancy and faster reconfiguration
    • Architectural convergence with 1588
summary of the synchronization sessions 2
Summary of the Synchronization sessions -2

3

  • IEEE Issue One stepclock
    • One-step clockimplies the implementation of hardware thatgreatlyreduces the processor requirements for synch and delayprocessing
    • Backwards compatibility a requirement
  • IEEE 1588 simulations for G.827x & 802.1AS
    • The proposed G.827x and 802.1AS profiles willmeettheir goals
    • Partial support still to beperformed in ITU
summary of the synchronization sessions 3
Summary of the Synchronization sessions -3
  • Network limits-Asymmetry Asymmetry remains one of the main issues in the transport of time. Partial support might add new sources of asymmetry
  • Synchronization network architecture
  • Key aspects of NGN synchronization
    • Packet network infrastructure
    • New synchronization requirements
    • New methods
    • New clock structures
    • Architecture helps see how all pieces fit together
summary of the synchronization sessions 4
Summary of the Synchronization sessions - 4
  • 802.1Q Stream reservation protocol
    • deterministic operation requires that resources are available
      • based on 802.1Q Multiple Registration Protocol
    • talkers advertise the streams that they can source
      • Important side-effect sets up a reservation « domain »
    • listeners register for streams
    • New work under way
      • static reservations, faster startup, big reduction in packet traffic, support for new shapers, more management
summary of the synchronization sessions 5
Summary of the Synchronization sessions - 5
  • 802.1Qbv scheduled traffic
    • Scheduling stream transmission can greatly reduce delays through switches
    • Cut-through makes sense
    • Management of schedule is not a plug-and-play operation, it will require intelligence
summary of the synchronization sessions 6
Summary of the Synchronization sessions -6
  • G.8275.x profiles
    • G.8275.x time PTP telecom profiles are designed to support the needs of current and future mobile technologies
    • G.8275.1 (full timing suport) will be finalized soon, G.8275.2 (partial timing support) is just starting