1. Preparing for Phase Delivery
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2. ©Chronos Technology: COMPANY PROPRIETARY
Agenda
Preparing for Phase Delivery
GNSS fit for PRTC
A Network fit for Phase distribution
The right Partnerships
17/09/2018
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3. ©Chronos Technology: COMPANY PROPRIETARY
Why prepare for Phase?
Phase must be supported…
When TDD technology is deployed
When some LTE-A services are to be offered
Our industry does not expect this to be as trivial as supporting Frequency over PTP proved to be
Phase to the edge at 500ns / 1 microsecond is tough
If you don’t prepare
Delays to the roll out of LTE-A services
The network performance requirements not met
Customer satisfaction affected
17/09/2018
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4. ©Chronos Technology: COMPANY PROPRIETARY
We can help …..
GPS/GNSS
Equipment
Design
Piloting
In-Service
Support
Futures
You prepare existing GPS installations
Evaluate new equipment
Design the phase delivery network
- Network elements / system planning
Piloting and dimensioning the network
Bring new equipment and services in to operation
Support co-existing legacy and modern timing systems
17/09/2018
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5. PhaseReadyTM – It’s a state of mind
Support
Audits
Installation
Source of
Time
Network
Timing
Client +
[…. nS]
[…. ns]
Phase budgets
Nano seconds count EVERYWHERE
17/09/2018
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6. Our updated and new solutions
An updated service portfolio of services to help you
Identify your state of readiness to support Phase
Assess the risks associated with Phase synchronisation
Solve the issues in your control before you go live
Frequency Ready Services
Sync AuditTM
(Frequency)
For legacy networks
Sync
MasterclassTM
Phase Ready Services
Phase Ready ‘Core Audit’
Phase Ready ‘Network
Audit’
For 4G / LTE-A networks
2008 Stoop: BT – Mike Gilson Doughnut
Stoop ‘08
Today ‘15
17/09/2018
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7. Let’s look at these Phase budgets
Source of
Time
[…. ns]
Satellite
System
Atmosphere
or “Space
Weather”
GPS/GNSS
Sub-system
Receiver GM
100 ns
Timing
Client +
[…. ns]
Packet
Buffering &
Processing
Algorithm
Precision &
Efficiency
Oscillator
Stability &
Holdover
<500 ns
Network +
[…. ns]
Number of Hops
Traffic
Engineering
Switch
Fabric &
Buffering
Redundancy &
Resilience
900 ns
Nano seconds count EVERYWHERE
17/09/2018
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8. ©Chronos Technology: COMPANY PROPRIETARY
When it works
GPS
Phase
Max Uncertainty
50ns
Phase
Master Clock
Overall delay budget is maintained. TDD operation and/or COMP, MIMO, eICIC, eMMBS operate as expected
Network
GPS
Phase Error
@500ns
Max Uncertainty
50ns
Phase Error
@200ns
Master Clock
17/09/2018
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9. When it goes wrong: Core site
GPS
Phase 400ns
Max Uncertainty 300ns
Phase 900ns
Master Clock
Overall delay budget is NOT maintained at one Core site. TDD operation and/or COMP, MIMO, eICIC, eMMBS will be compromised
Network
GPS
Phase 900ns
Max Uncertainty 100ns
Phase 400ns
Master Clock
17/09/2018
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10. When goes wrong: Network
GPS
Phase 400ns
Max uncertainty 100ns
Phase 900ns
Master Clock
Overall delay budget is NOT maintained at one part of the network. TDD operation and/or COMP, MIMO, eICIC, eMMBS will be compromised
Network
GPS
Phase 1100ns
Max uncertainty 100ns
Phase 400ns
Master Clock
17/09/2018
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11. When it goes wrong: Core & Network
GPS
Phase 400ns
Max uncertainty 100ns
Phase 900ns
Master Clock
Overall delay budget is NOT maintained at one part of the network. TDD operation and/or COMP, MIMO, eICIC, eMMBS will be compromised
Network
GPS
Phase 1100ns
Max uncertainty 300ns
Phase 400ns
Master Clock
17/09/2018
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12. When it goes wrong (or does it?): Core & Network
GPS
Phase 400ns
Max uncertainty
300ns
Phase 900ns
Master Clock
While the two cells are nearly in Phase with each other, will a mobile device talking to other adjacent cell sites perform as expected?
Network
GPS
Phase 1100ns
Max uncertainty
100ns
Phase 400ns
Master Clock
17/09/2018
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13. Phase budget - Core site
[…. ns]
[…. ns] +
[…. ns] +
Source of
Time
Timing
Client
Network
Satellite
System
Atmosphere
or “Space
Weather” +
GPS/GNSS
Sub-system
[…. ns]
Receiver (GM)
17/09/2018
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14. PhaseReadyTM “Core Audit”
Suitability of site to become a PRTC
Typically 1 day for each full site audit
Local health and safety rules can restrict audit scope
Service deliverables
GPS system time of day delay data
Physical assessment of existing GPS system / GM hardware
Assessment of collocated GPS systems and their possible impact on Phase deliver
Support for updating clock configuration
Verification of clock performance
Phase Ready ‘Core Audit’
17/09/2018
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15. + + + Phase budget - Network […. ns] […. ns] […. ns] Source of Timing
Time
Timing
Client
Network
Number of
Hops
Switch Fabric & Buffering +
Engineering
Induced
mis-configuration
[…. ns]
Redundancy &
Resilience
3rd Party Backhaul – Many unknowns for the mobile operator
17/09/2018
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16. PhaseReadyTM “Network Audit”
Suitability of network to support require phase budget
Each project is scoped individually with you
Typical service deliverables
Application requirements review
Normal operating conditions
Under failure conditions
Allowances review and testing as required
Network allowance
Routers, Switches, Boundary Clocks transfer function testing
Hop by hops or link by link testing and analysis
PTP Slave allowance
Transfer function testing
Results and recommendations
Phase Ready ‘Network Audit’
17/09/2018
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17. Metrics – which one(s)? One way path delays Sync Performance metrics
For accurate and meaningful metrics, all must be collected with accurate time references (typically GPS/GNSS)
GPS
TimeError
TE/TIE/MTIE/TDEV
Path Delay TE
PDV
FPP, MinTDEV, MAFE
PTP
GPS
1PPS ToD GM
Network OC BC
SyncE
Freq
Confidential – Released under NDA 2014
17/09/2018
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18. Referenced & unreferenced metrics
To compare metrics collected at different points each of those collection points must have the same reference
Probes provide;
An independent reference
An independent view of performance
2-5% of sites equipped with GPS/GNSS referenced SyncWatch or SyncBOX-u units to provide accurate metrics datum
GPS
NTU/IADs/Cell site aggregators
Independent probes provide “control” for un-referenced metrics delivered by NTU/IADs/Cell site aggregators
Many IADs / NTUs do not support the addition of a GPS reference input
GPS
GPS
GPS GM
GPS
17/09/2018
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19. ©Chronos Technology: COMPANY PROPRIETARY
Sync MasterClassTM
Standard public classes
2 day course
Customer specific classes
Standard 2 day course
Tailored 1 and 2 days courses
Can be supplemented by practical / hands on training on request
Modular course architecture
Select modules to select from to match your audience
Sync
MasterClassTM
17/09/2018
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20. Partnerships ensuring end to end timing excellence
Most networks are multi-vendor technology
Sync & timing increasingly supported by the network elements
Chronos increasingly partnering with NE vendors
To deliver end to end solutions for network operators
GPS/GNSS systems, Sync testing & measurement, Sync design & planning, system installation and commissioning
Vendor 1
Vendor 2
Vendor 3
Vendor 4
PTP Synchronisation
GPS BC
GM/BC
17/09/2018
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21. PhaseReadyTM – Get connected
LinkedIn ….
Blog …
Twitter …
17/09/2018
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22. Summary: Why Chronos? The Mast Graphic To be
29 years in time and timing
Delivering to the Telecom, Power and Finance industries
New PhaseReadyTM offerings
New/strengthened industry partnerships
Experienced
Deployment and support of entire timing networks for network operators
Global experts in industrial grade GNSS/GPS systems
Developer of world renowned Sync MasterClassTM
Developer of the original Sync AuditTM service
Developer of boutique sync equipment
SyncPORT, SyncBOX-u, CTL42xx Series
Developer of test and measurement tools
TimePortTM and SyncWatchTM
The
Mast
Graphic
To be
placed
here?
Nano seconds count EVERYWHERE
17/09/2018
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23. ©Chronos Technology: COMPANY PROPRIETARY
Questions
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24. ©Chronos Technology: COMPANY PROPRIETARY
17/09/2018
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