Transcript SCI-162 Symposium, Session 2

14th ICTS General Meeting
ITC 2005, Las Vegas, 25. Oct. 2005
CEPT PT 3 Meetings on AI 1.5 & 1.6
29 to 31 August 2005
at ERC in Copenhagen
Results & Comments
Gerhard Mayer
Vice Chair ICTS
GVM Consulting
An IFT Sponsored Group
Agenda
• CEPT Brief on agenda Item 1.5
• Points relevant to AI 1.5 of CEPT Brief 1.6
• UAV spectrum requirements
• General & technical aspects
An IFT Sponsored Group
Preliminary CEPT Position on AI 1.5
• Supports primary allocation to the AMS 50[30] – 5150 MHz for
aeronautical TM & TC, subject to successful sharing studies
• Footnote: use of AMS should impose no constraints of operations to
the ARNS
• If sharing studies with positive result, development of a new ITU-R
recommendation of range separation distance between ARNS
(MLS) and AMS (TM & TC transmitters).
• AMS is the appropriate service category for aeronautical TM & TC,
general definitions in the RR not needed
• UAV requirements for flights in the non segregated airspace should
be handled separately from those of AI 1.5 and AI 1.6
An IFT Sponsored Group
CEPT Position on AI 1.6, relevant to AI 1.5
• Support AM(R)S primary allocations
116 – [118] MHz, 960 – [1 164] MHz, [5 030] – 5 150 MHz
• 5 030 – 5 090 MHz required to satisfy the ARNS (MLS)
• Challenging requirements for MLS (capacity studies of ICAO) based
on 200 channels (300 KHz) between 5 030 – 5 090 MHz
• Each channel needing 1,5 MHz protection bandwith
• The extention band for MLS 5 091 – 5 150 MHz may be possibly
used for other services than ARNS, preferably for AM(R)S (ATC,
AOC, security systems)
An IFT Sponsored Group
CEPT Position on other bands under
consideration within the ITU
• 4 400 – 4 490 MHz, sharing difficult or impossible due to numerous
fixed links and tactical radio relays
• 5 925 – 6 700 MHz, sharing difficult due to numerous fixed links, but
CEPT not opposed to study compatibility
• 22.5 – 23.6 GHz, sharing difficult due to deployment of fixed links,
but CEPT not opposed to study compatibility
• 23.6 – 24.0 GHz, sensitive passive services to be protected
• 24.75 -25.5 MHz, planned for wireless local loop systems, but CEPT
not opposed to study compatibilty
• 27.0 – 27.5 GHz, sharing studies should be initiated in this band
An IFT Sponsored Group
Technical Aspects
• Aeronautical Telemetry needs (short term) additional
spectrum, preferably not higher then 5 GHz
• Studied range 5 0[30] – 5 150 MHz suitable,world wide
harmonized, technology available for onboard and
ground systems, Ops conditions and wave propagation
characteristics known from C-band Radar operations.
•
24.75 – 25.5 GHz and 27 – 27.5 GHz (long term) are
probably the most promising candidate bands for study.
Technology to be further developed,present operational
experience level very poor
An IFT Sponsored Group
General Aspects
• Spectrum Sharing ARNS (MLS) with AMS (aeronautical
TM & TC) must be possible
• Coexistence of MLS operations (as a local fixed, short
range system) and aeronautical TM & TC by regional
coordination
• Few MLS installations in wide parts of the world, only
• Future of the system between 5 091 and 5 150 MHz is
under review
• Decision not to be expected, as long as ARSNS (based
on GPS/ Galileo, EGNOS) for aircraft approach is
evaluated and certified.
An IFT Sponsored Group
Special Case: UAV-Bandwidth Requirements
• 32 countries develop UAVs, >200 types existing
• Extensive applications: civil, commercial, mil., science
• Needs extremely reliable data links and in access QoS
-Operational links UAV to ATC and Pilot (on ground)
-Optional satellite links
-Autonomous flight Operation, i.g. CAS, wx-Radar, SatNav
-Payload sensor data (i.g. imaging, SAR, spectrometer)
-Flight deck test data during UAV evaluation
• Bandwith requirements:
-Op + flight test: fop < 6 GHz, BWop > 10 – 30 MHz
-Payload data: fpl > 6 GHz, BW pl > 30 - 150 MHz
An IFT Sponsored Group
Further Studies on UAV Spectrum Needs
• UAV requirements during T & E Phase, with flights in the restricted
airspace should be studied within AI 1.5
• Spectrum estimates per UAV available from the UK (30 MHz) and
Germany (50 MHz)
• A new generation of hyperspectral imaging sensors with
100channels for UAV application(medium term) expected , resulting
in additional 50 MHz bandwidth need per UAV
• UAV flights in the non segregated airspace and their
telecommunication needs call for a fundamental study, shared by all
concerned groups.
• Long distance UAV flights need satellite links, that do not fall either
under AI 1.5 or AI 1.6
An IFT Sponsored Group