e-navigation workshop...page 1 e-navigation workshop update on vdes (vhf data exchange system) and...

e-Navigation Workshop

Update on VDES (VHF Data Exchange System) and how this

can contribute to e-navigation and SAR operations

21/10/2013

Gaetan Fabritius

CLS, Head of Maritime Surveillance Team

www.lrit.fr / www.sat-ais.fr

http://www.lrit.fr/

http://www.sat-ais.fr/



Presentation Overview

Introducing CLS

Background on VDES and international context

CLS and VDES

Challenges and way forward

Conclusion

Example of CLS SAT-AIS services

Created: 21 April 1986 – subsidiary of the French Space Agency (CNES)

Operating the Argos constellation (Advanced Doppler location)

Core activities:

• Commercial operation of satellite systems for positioning, data

collection, ocean observation and surveillance

• Developing added-value applications and services based on

satellite remote-sensing data;

Applications to:

• environmental surveillance

• sustainable management of marine resources

• maritime surveillance

• oil and gas

Supported by: CUNLOGAN – CLS office in Chile

Introducing CLS (1/2)

Introducing CLS (2/2)

CLS day to day mission

Background on VDES (1/2)

Increasing need for communication and sharing of information in the

maritime domain (shore to ship, ship to shore, ship to ship)

IMO, IALA and ITU are the leading bodies to regulate (express needs,

ask for new frequencies, define what to do with them, specify technical

requirements, propose regulation updates)

The World Radio Conference (WRC-12) has made substantial

provisions for the maritime community in the VHF band:

- Exclusive utilisation of current AIS1 and AIS2 by the maritime

mobile service in Region 2 and 3 (in 2025)

- Allocation for the mobile satellite service for channels 75 and 76

for long range AIS (new message 27)

- Identification of the channels 27, 28, 97, 88 for testing future AIS

applications, e.g. Application Specific Messages (ASM)

- Identification worldwide of channels 24, 84, 25, 85, 26, 86 for

utilisation of digital systems

Background on VDES (2/2)

Expanding use of AIS has caused significant increase in VHF Data

Link (VDL) loading which has become an active concern at IMO and

ITU and for maritime administrations in general:

- AIS is well recognized, important tool, effective and useful technology,

SOLAS vessels (Class-A)

- Too much !: AIS SART, AIS MOB, EPIRB AIS, AtoN, non SOLAS

vessels (Class-B), ASM...

- While AIS is a navigation system, not fitted for data exchange

Agenda Item 1.16 for WRC-15: “consider regulatory provisions and

spectrum allocations to enable possible new AIS technology

applications and possible new applications to improve maritime

radiocommunication”

International context

e-navigation (IMO): “the harmonized collection, integration, exchange,

presentation and analysis of marine information onboard and ashore by

electronic means to enhance berth to berth navigation and related services

for safety and security at sea and protection of the marine environment.”

IMO is now developing an e-navigation strategy implementation plan

with a target completion year for the plan of 2014. Simultaneously, IMO is

now conducting a review and modernization of GMDSS with a target

completion year of 2017. In the discussion of both matters, one of the

common key elements is exchange of information and this will be achieved

possibly by digital data exchange.

VDES could be defined as a technological concept developed to address

emerging indications of overload of VHF Data Link (VDL) of AIS and

simultaneously enabling a wider seamless data exchange for e-

navigation, potentially supporting the modernization of GMDSS, both

processes that are currently developed by IMO.

Current VDES frequency allocation (draft)

Possible Roadmap for VDES (draft)

Challenges and way forward

NAV-58: some delegations already expressed interest for VDES solutions.

NOT a next generation of AIS but a complementary data exchange

system on the VHF bands ensuring backwards compatibility with the

existing AIS system and equipment.

Objectives of VDES: protecting the integrity and future of AIS primary

navigation mission (VDL) & offering new automatic data exchange

capacities for future services.

VDES = terrestrial and satellite (uplink, downlink, 2 ways)

CLS and VDES

CLS already deeply involved in VDES definition and design at IALA, ITU

and IMO.

Currently under contract with the European Space Agency (ESA) to

complete a preliminary study: service requirements and mission, system,

architecture requirements

Key stakeholders (maritime administrations, space agencies, regulatory

bodies and industry) already involved.

Test bed and demo with terrestrial and satellite prototypes scheduled for

2015/2016.

CLS is inviting administrations to join the on-going study to express their

needs, constraints and expectations.

Examples of future VDE-SAT services

Conclusion

VDES is an opportunity for maritime administrations within the

context of e-navigation and modernization of GMDSS.

You are invited to participate in the design of VDES for the benefit

of your future e-navigation and GMDSS services !

Example of CLS Satellite-based services

(on the VHF band – SAT-AIS)

From AIS to SAT-AIS

Principe et Technical Challenges

Protocole: SOTMDA (Self-Organized Time Division Multiple Access):

• Future transmission slots reserved;

• Self-organized cells ~ 40 NM in radius;

• Transmissions as frequent as every 2 s;

• 2 channels, each with 2250 slots per minute;

• 27 message types (static and dynamic information);

• > 70,000 Class-A ships;

NOT designed for reception from space.

SAT-AIS:

• Field of view is large (~ 5000 km diameter, horizon-to-horizon);

• Observation time up to ~ 12 min;

• Many asynchronous SOTDMA cells in field of view simultaneously;

• Transmissions from different cells overlap;

• Receiver strategies required to deal with message collisions.

Need for specific (CLS patented) spectrum processing algorithms to

deal with message collisions: retrieve more messages & focus on a

given ship/fleet of interest when processing the signal.

EU SAT- AIS Data Processing Center (DPC)

CLS SAT-AIS Data Processing Center

Example of data fusion service

Thank you

www.sat-ais.fr

Contact: [email protected]

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