Update on Wireless

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18 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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Update on Wireless
Avionics Intra
-
Communications
(WAIC)


ITU
-
R Update

and Future Regulatory

Considerations

ICAO WG
-
F Meeting


Paris, France

March 2011

Mr. Joseph Cramer

Agenda


AVSI and WAIC


Importance of WAIC


WRC
-
12 Agenda Item Potentially Impacting
WAIC


AI 1.12


ITU
-
R Update


Future WRC Agenda Item Proposals


Agenda Item 8.2


ICAO and Future Course of Action


ICAO and CEPT Support

AVSI and WAIC


What is the Aerospace Vehicle Systems Institute (AVSI)


Aerospace Vehicle System Institute
-

A cooperative of companies, academia
and government agencies.


Focus on developing improved aerospace vehicles.


Creates an environment for collaboration on research and development
projects; investigates emerging technologies; and influences standards and
policies to promote cost effective systems development and certification.


What is Wireless Avionics Intra Communications (WAIC)


ITU
-
R Report M.2197


Radiocommunication between two or more points on a single aircraft.


Includes integrated wireless components and/or installed components.


Part of a closed, exclusive network required for operation of the aircraft.


Does not provide air
-
to
-
ground, air to satellite, or air
-
to
-
air
communications.


Only safety related applications are being contemplated.


Not for passengers or in
-
flight
entertainment

Importance of WAIC to Aviation Industry


Environmental Benefits


Goal is to reduce wiring and associated aircraft weight,
enabling less fuel burn.


Increased Reliability


Fewer connector pins/failures, cracked insulation, &
broken conductors.


Mesh networks could provide redundancy in emergencies.


Safety Improvements:


Wireless links can provide redundancy


Reduce amount of aging wiring and associated malfunction
issues


fewer connector pins/failures, lower risk of cracked
insulation & broken conductors


Importance of WAIC to Aviation Industry


Operational Efficiency Improvements


Ability to obtain more data from aircraft surfaces


Easier and more reliable access to maintenance data,
particularly for rotating and moving parts (e.g. wheel
wells, actuators, etc.)


Less wire maintenance to remediate chafing
conditions


Simplify and reduce life
-
cycle cost of airplane wiring


Reduced weight should save fuel costs

WAIC Technical Characteristics


WAIC is based on short range radio technology (< 100m)


WAIC will utilize low transmission power (< 10 mW)


Most
applications are internal
-

within fuselage/cabin


External transmission via directive antennas (e.g.
landing gear, wings)


Communication in WAIC systems takes place between
aircraft stations (although both on same aircraft)


Communication in WAIC systems is related to safety and
regularity of flight


WAIC systems will be installed primarily onboard civil
aircraft operated along national or international civil air
routes

Examples of Potential WAIC Applications


Low Data Rate, Interior Applications:


Sensors
:

Cabin Pressure
-

Smoke Detection
-

Fuel Tank/Line


Proximity


Temperature
-

EMI Incident Detection
-

Structural Health Monitoring
-


Humidity/Corrosion Detection


Controls
:

Emergency Lighting
-

Cabin Functions


Low Data Rate, Outside Applications:


Sensors
:

Ice Detection
-

Landing Gear Position Feedback
-

Brake Temperature
-


Tire Pressure
-

Wheel Speed
-

Steering Feedback
-


Flight Controls Position Feedback
-

Door Proximity
-

Engine Sensors
-


Cargo Compartment
-

Structural Sensors


High Data Rate, Interior Applications:


Sensors:

Air Data
-

Engine Prognostic
-


Flight Deck/Cabin Crew Still Imagery / Video



Comm.:

Avionics Communications Bus
-

FADEC Aircraft Interface
-


Flight Deck/Cabin Crew Audio / Video (safety
-
related)
-


Flight
-
Operations related Digital Data (e.g. EFOS…)


High Data Rate, Outside Applications:


Sensors
:

Structural Health Monitoring
-

Imaging Sensors (Still and Video)


Controls
:

Active Vibration Control


Comm.
:

Avionics Communications Bus

WRC
-
12 Agenda Item Potentially
Impacting WAIC


Agenda Item 1.12


Seeks to determine if the aeronautical mobile service should
not be permitted in the 37
-
38 GHz band


No current aviation systems in this band.


Until 2008, no aviation systems were considered in this
band.


Given protection criteria for SRS systems, unlikely WAIC can
use the band unless protection criteria are realistic.


ICAO Position


To oppose excluding aeronautical use of the existing mobile
service allocation in the band 37
-

38 GHz. To support the
use of technical protection limits to ensure that any future
AMS system in the band 37
-

38 GHz will be compatible with
other co
-
primary services
.


CPM Report effectively removes ability of aeronautical
systems to use band at this time
.

WRC
-
12 Agenda Item Potentially
Impacting WAIC


Agenda Item 1.12


CITEL Position


Consistent with ICAO Position


CEPT Position


Eliminate Aeronautical Mobile
Service


APT Position


Support the sharing studies


ASMG Position


Support sharing studies & eliminate
AMS if studies show sharing is not possible


ATU Position


TBD?


Aerospace Industry wants to protect Space
Research Service


AMS systems will not interfere with Fixed
Service applications.

ITU
-
R Working Party 5B


Update


WP5B is lead ITU
-
R Group


WAIC New Report


ITU
-
R M.2197


Technical Characteristics and Operational Objectives
of WAIC Systems


Approved at November 2010 Study Group 5 meeting

Agenda Item 8.2

ICAO and Future Course of Action


Future WRC Agenda Item Proposals for
WAIC


Proposals submitted by Germany, Brazil, and New
Zealand to Regional bodies.


German proposal submitted to CEPT in 2010.


US proposal will be submitted to CITEL. (See ICAO
Document IP XX for this meeting)


World
-
wide allocation(s) must be obtained


Spectrum usage must fall within ICAO Convention in
order to obtain benefits for equipment certification.


US proposal is most specific


First look at “aviation”
bands (AM(R)S and ARNS bands).



Agenda Item 8.2

ICAO and CEPT Support


Prior to and post approval of a WAIC Agenda Item,
support from ICAO and other relevant bodies is
required.


Need explicit support from ICAO at WRC
-
12.


WAIC’s safety benefits could be incorporated into
the ITU
-
R Regulations in several ways:


AM(R)S (preferred option)


Aeronautical Mobile Service with Footnote providing
priority


Addition of Definition similar to 1.79 for aircraft purposes


Need to consider how to meet ITU
and

ICAO
requirements:



Service Definition


Issues to Address Regarding Future Agenda Item


Under
what
Service should WAIC be classified?


AM(R)S
-

ITU
-
R incumbents much more motivated to
oppose, but
WAIC is not ubiquitous and is a low power radio technology.


AMS with footnote providing details for protection


Potential for weakening aviation safety argument.


Adding a
definition
similar to ITU
-
R 1.79:


on
-
board communication station: A low
-
powered mobile station
in the maritime mobile service intended for use for internal
communications on board a ship, or between a ship and its
lifeboats and life
-
rafts during lifeboat drills or operations, or for
communication within a group of vessels being towed or pushed,
as well as for line handling and mooring instructions.


World
-
wide allocation(s) must be obtained


Spectrum usage must fall within ICAO Convention in order to
obtain benefits for equipment certification.

Service Definition


WAIC could be classified as AM(R)S
-

It complies
with RR Article 1.33


1.83 aircraft station:
A mobile station in the aeronautical mobile service,
other than a survival craft station, located on board an aircraft.


A WAIC transmitter can be considered an “aircraft station” because it is located on an
aircraft.


1.32 aeronautical mobile service:
A mobile service between aeronautical
stations and aircraft stations, or
between aircraft stations
, …


Communication between WAIC transmitters conforms with the requirement “between
aircraft stations”. No requirement that aircraft stations cannot be on same aircraft.


1.33 aeronautical mobile (R) service:
An
aeronautical mobile service
reserved for
communications relating to safety and regularity of flight
,
primarily along national or international civil air routes.


WAIC applications are defined as limited to safety applications.


WAIC systems will be installed onboard civil aircraft operated along national or
international civil air routes