1. Geneva, Switzerland, 13 July 2013 1 G.8265.1 (PTPprofileFrequency) G.8275.1 (PTPprofile1Time/phase) Basics Clock Methods Profiles Frequency: G.826xTime/Phase:G.827x G.8265.m (PTP Profile frequency m) G.8261.1 (NetwkPDV_frequency) G.8271.1 (Network limits_time/phase Network requirements SyncE Jitter-Wander: (Included in G.8261) G.8261 G.8271 G.8272 PRTC G.8273 G.8275 (architecture-time) G.8262 (SyncE) G.8264 (SyncE-architecture-SSM) G.8265 (architecture-Frequency) G.8275.2 (PTPprofile2Time/phase ) G.8271.2(profile2) Definitions / terminology G.8260 (Definition) 73.1 GM 73.2 BC 73.3 TC G.8260 AppI (metrics) Overview of Q13 recommendations Ongoing Agreed G.8263 (slave clock) 73. x,y,z G.supp

2. 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 Geneva, Switzerland,13 July 2013 2

3. Summary of the Synchronization sessions -2 3 IEEE Issue One step clock One-step clock implies the implementation of hardware that greatly reduces the processor requirements for synch and delay processing Backwards compatibility a requirement IEEE 1588 simulations for G.827x & 802.1AS The proposed G.827x and 802.1AS profiles will meet their goals Partial support still to be performed in ITU Geneva, Switzerland,13 July 2013 3

4. 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 Geneva, Switzerland,13 July 2013 4

5. Summary of the Synchronization sessions - 4 Geneva, Switzerland,13 July 2013 5 802.1Q 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

6. 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 Geneva, Switzerland,13 July 2013 6

7. 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 Geneva, Switzerland,13 July 2013 7