1. How Packet Based Methods are addressed by Q13
Frequency Sync
Time/Phase Sync
Application
Packet based
methods
Arrangement
Basic
Requirements
(Independent
from
protocols)
CES
(“traffic masks”)
PNT
(“x ppb”)
Phase/Time (e.g. “0.1-1 ms”)
Accurate Phase/Time (e.g. “0.5 – 3 ms”)
Specific
requirements
(dependent on
Protocols
Definition
General
With support from
Network Nodes
End-to-end
(“sync mask”)
Protocols details
Work flow
Implementations with PTP, NTP, Others (“Telecom Profiles”) (G.8264)
- Performance related aspects (G.8264, G.8263?, G.8261? )
Network Architecture (G.8261)
Network Modelling (G.8264)
Clock Spec. (G.8263)
Equipment Functions (G.8261, G.8264)
Inputs from other standardization bodies
Study area tecnhically relevant
Study area could be technically relevant but probably is of lower interest
Study area relates to a challenging scenario (technically possible in special cases)
Target Requirements (G.8261)
Sync Methods (G.8261)
Network Limits (G.8261)
Outside Q13 scope (e.g. IETF, IEEE)
Traditional ToD (e.g. “ ms”)
Network Architecture (G.8265)
Network Modelling (8265)
Clock Spec. (G.paclock-ter)
Equipment Functions (G.8265)
Implementations with PTP, NTP, Others (“Telecom Profiles”) (G.8265)
- Performance related aspects (G.8265)
Target Requirements (G.pactiming-bis)
Sync Methods (G.pactiming-bis)
Network Limits (G.pactiming-bis)
Performance
Related aspects
Ericsson AB 2008

2. Applications Requirements: Frequency synchronization
Applications Requirements: Frequency synchronization
Application Class
Example applications
Strandard/Speciifcations/Recommendations
Main Sync Methods
Identified or Under discussion
“Long Term Accuracy”
GSM, WCDMA FDD,
LTE FDD
50 ppb
100 ppb (Pico)
ppb (Home)
Packet based (no “on-path-support”).
Note: PDV controlled and/or stable oscillator (OCXO)
“Traffic Masks”
CES (Adaptive methods)
ITU-T G.8261 CES Budget (application case 1 and 2)
ITU-T G.823, G.824 traffic masks
Note: PDV controlled and suitable oscillator
“Synch Masks”
Support for CES (Network synchronous, Differential)
ITU-T G.823 , G.824 synchronization mask
G.8261 (EEC network limits)
Timing over Physical layer (e.g. SDH, syncE)
GPS
Ericsson AB 2008

3. Applications Requirements: Time synchronization
Applications Requirements: Time synchronization
Application Class
Example applications
Strandard/Specifications/Recommendations
Main Sync Methods
Identified or Under discussion
ToD Traditional ( ms)
Billing, Alarming, etc.
Packet based (no support from the network).
Tens of microseconds-hundreds of microseconds
IP delay monitoring;
LTE TDD (some configurations)
Y.1541
3GPP
Packet based (no “on-path-support”).
Note: PDV controlled and suitable oscillator
0.5 – 3 microseconds
MBSFN
WCDMA TDD
TD-SCDMA
CDMA2000
GPS
Packet based (with path support)
Main focus for
TICTOC ?
Ericsson AB 2008

4. Q13 Frequency Sync Recommendations
Q13 Frequency Sync Recommendations
Recc.
Main Contents
What is missing
G.8261
Target Requirements
Network Limits
Sync Methods
Detailed model to clarify where the PDV limits apply.
PDV metrics and related network limits
G.8262
SyncE Clocks
completed
G.8263
Packet based clocks spec
Clock model
PSC, PEC, specifications
New Clocks?
G.8264
Modelling Functional blocks
Equipment functions
Details on use of protocols: for syncE (i.e. SSM) and for packet based (e.g. “IEEE1588 Telecom Profiles”: these could be handled in Annexes, one per application)
Details on packet based methods incl. profiles
Ericsson AB 2008

5. Q13 Time-Phase Sync, Planned Recommendations
Q13 Time-Phase Sync, Planned Recommendations
Recc.
Main Contents
G.pactiming-bis
Target Requirements
Network Limits
Sync Methods
G.paclock-ter
Time-Phase clocks spec (e.g. Boundary clock)
G.8265
Functional blocks Modelling
Equipment functions
Details on use of protocols (e.g. “IEEE1588 Telecom Profiles”, NTP implementations; these could be handled in Annexes, one per application)
Ericsson AB 2008