Flavio sbardellati on Galileo differentiators for mass market

1. Galileo differentiators
for mass market
GNSS raw measurements workshop
GSA Headquarters, Prague, 30 May 2018
Flavio SBARDELLATI, GSA Market Development

2. • Authentication
‒ Data level: Navigation Message Authentication
Integrated in the E1-B band for OS. Aimed at consumer users and
offered for free. Already prototyped and under testing
‒ Range level: Signal Authentication
Based on the E6-C Spreading Code Encryption to protect against
more sophisticated attacks
• High Accuracy
‒ Based on PPP transmission in E6B
‒ FREE provision
Galileo will soon provide
innovative features
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3. Galileo signals and services
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Service Signal
E1b
E1c
E5a
E5b
E6b
E6c
Spreading code
Unencrypted
Unencrypted
Unencrypted
Unencrypted
Unencrypted
Encrypted
Data
Yes I/Nav
No (Pilot)
Yes I/Nav
Yes F/Nav
Yes C/Nav
No (Pilot)
OS-NMA
High Accuracy
OS single frequency
OS dual frequency
OS multi-frequency
Signal
authentication

4. “Navigation Message
Authentication” is the ability
of the system to guarantee to
the users that they are
utilising navigation data that
has not been modified and
comes from the Galileo
satellites and not from any
other source.
Galileo OS Navigation
Message Authentication
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Clear differentiator w.r.t. other GNSS available to
the civil community
Fully backward compatible
Disseminated on the first Galileo frequency (E1B)
Contributes to mitigate GNSS vulnerabilities
No need to store secret keys in the Rx, just public
key
Follows crypto standards and recommendations to
be secure over the next decades
Ref. Galileo Navigation Message Authentication
Specification for Signal-In-Space Testing – v1.0
(to be updated)

5. PATROL
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6.  Autonomous Driving positioning engine
(ESCAPE) led by FICOSA with the
participation of Renault
 Professional multi use-cases receiver
leveraging on Galileo-specific features
(FANTASTIC)
 Autonomous driving positioning engine for
trucks (ProPART)
OSNMA receivers are being
developed
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7. 2019: OS-NMA test campaign
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8. Galileo High Accuracy Service
is offered for FREE
User positioning accuracy with decimeter level
error (≈20cm)
No need of additional ground communication
channel (448 bps allocated on Galileo E6B)
No need of proximity to base stations to access
corrections (as opposite to RTK)
Triple frequency to further increase accuracy and
reduce PPP convergence time
Improved line-of-sight and better coverage at high
latitudes

9. 9

10.  I/NAV message updated with additional bit
formerly “reserved”, over OS E1-B
 Fully backward compatible
1) RedCED: enabling better time to first fix, at the
expense of an initial degraded accuracy;
2) SSP: to strengthen synchronisation with mobile
networks;
3) FEC2: to improve data tracking in difficult
environments;
Three key additions to I/NAV
message for OS users
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11. Gradual implementation by
FOC
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2018
2019
System upgrade
Updated Galileo SIS ICD (I/NAV imp. only)
OS-NMA Live signals
(TEST mode)
Fully
operational
2020
….
….
OS-NMA TEST CAMPAIGN
 OS-NMA
 High Accuracy
 Improved I/NAV

12. Enhanced GNSS user terminal
(GEX.0216)
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I/NAV
improvements
Galileo
OS-NMA
ENHANCED GNSS
USER TERMINAL
Stages
Indicative
planning
Publication of the call Q4 2018
Deadline for submitting applications Q1 2019
Evaluation period Q2 2019
Information to applicants on the
outcome of the evaluation
Q3 2019
Signature of the Grant Agreements Q4 2019
Allocated budget: € 3,000,000
 up to 70% funding of the eligible total
costs.
 up to 2 projects to be granted.
 OS-NMA enabled RX/UT (TRL 7+) for a target
application (non ST)
 Optimal protection against spoofing attacks.
 Making optimal use of the improved I/NAV.
 Cost efficient and compliant with the specific
application constraints.
Objectives of the Call for Proposals:

13. Linking space to user needs
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www.GSA.europa.eu
Get in touch:
GSC-europa.euEGNOS-portal.eu UseGalileo.euG

14. TTFF at 95% probability ~20s would be
achievable, compared to ~30s with the current
I/NAV structure at the expense of an initial
degraded accuracy. Afterwards around 30s full
accuracy is achieved.
One additional I/NAV word (128 bits) repeated
twice per sub-frame (30s), containing:
- 6 Keplerian parameters
- 2 clock correction coefficient (clock bias and clock drift)
RedCED – Reduced Clock and
Ephemeris Data
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15. Improved Clock & Ephemeris Data (CED) error
rate in I/NAV message, thus Data demodulation
sensitivity improved by around 3dB.
Outer Reed-Solomon (RS) coding:
- Improves robustness (while preserving accuracy)
- Reduces Time-To-Data (TTD), i.e. time to retrieve CED
- Can be combined with Reduced CED
FEC2 – Additional Forward
Error Correction
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16. Fast synchronisation capability enabled with an
initial clock uncertainty of +/-3s ensuring
compliance to LBS and 3GPP standards on coarse
time assistance. Current I/NAV structure requires
+/-0.5s.
Three pre-defined sequences SSP1, SSP2 and
SSP3 are transmitted in three consequent I/NAV
pages (2s 3x), synchronized with GST.
A Rx can correlate to find occurrences of the
incoming SSP stream to retrieve GST (modulo 6s).
SSP – Secondary
Synchronisation Pattern
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