CEPT
ECC
Electronic Communications Committee
Ca-US-ECC Cooperation 2011
Broadband DA2GC
Broadband Direct-Air-to-Ground Communications
US ECC(11)003
Thomas Weilacher – Vice-Chairman of WG FM
ETSI SRDoc
• ETSI submitted a System Reference Document (SRDoc) to CEPT/ECC:
ETSI TR 103 054 V1.1.1 (2010-07)
• ETSI SRDoc focus on the Direct-Air-to-Ground connection:
– DA2G communication infrastructure on-board the aircraft (external antenna(s), modem,
cabling, interface to on-board network),
– terrestrial radio access network with broadband backhaul links
• A comparable system using 3G CDMA EVDO technology, namely the
“GOGO” service operated by Aircell, has been introduced in the USA in
the 800 MHz band (awarded in the year 2006), http://www.aircell.com
Licence C: 849.0-850.5 MHz / 894.0-895.5 MHz
Licence D: 850.5-851.0 MHz / 895.5-896.0 MHz
• SkySurf Canada (2 x 2 MHz) started operation in 2011, also voice
telephony is allowed (prohibited on-board aircraft in the USA),
849-851 MHz / 894-896 MHz, http://www.skysurf.ca
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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System architecture
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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Phases of a typical flight profile
Adoption of lower transmit power during take-off, climb, descent and
landing is possible (no Broadband DA2GC below 3000 m).
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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Technical parameters, operating frequency
• It is envisaged to use standardised equipment (e.g. LTE)
• The Ground Station (GS) antenna characteristics are similar to those of a
Base Station in a terrestrial mobile network (instead of antenna down tilt
an antenna up tilt is used)
• The Aircraft Station (AS) antennas will probably be omni-directional
• The target operating frequency is in the range below 6 GHz:
– the lower the operating frequency, the lower the path loss and thus the better
the link-budget,
– a higher operating frequency would lead to smaller structures for e.g. the GS
and AS antennas,
– due to the high velocities, the Doppler shift would increase to unacceptable
values above 6 GHz.
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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Spectrum requirements
• Spectrum requirements by taking into account typical spectrum values
(between 1 and 2 bit/s/Hz), a reuse factor of 1 and also future demands
for broadband data access:
– 10 MHz for the Forward Link (FL), link from the GS to the AS
– 10 MHz for the Reverse Link (RL), link from the AS to the GS
• Unpaired spectrum for TDD operation (20 MHz) might be seen as
secondary option.
• The main application field will be Air Passenger Communications (APC)
via fixed or RLAN based on-board connectivity.
• In addition the system may also support Airline Administrative
Communications (AAC).
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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Activities within CEPT/ECC (1)
• ECC Working Group Frequency Management (WG FM) is responsible
for spectrum issues on Broadband DA2GC,
FM PT 48 has been established (third meeting in September 2011),
http://www.cept.org/ecc/groups/ecc/wg-fm/fm-48
• ECC Working Group Spectrum Engineering (WG SE) is responsible for
compatibility and sharing issues on Broadband DA2GC,
SE PT 44 has been established (first meeting in September 2011),
http://www.cept.org/ecc/groups/ecc/wg-se/se-44
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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Activities within CEPT/ECC (2)
• Identification of candidate bands, based on the ETSI SRDoc. and
based on an alternative approach submitted by Lufthansa Systems
• Prioritisation of candidate bands (4 categories)
• Compatibility and sharing studies for “category 1 bands” have been
initiated by WG FM:
– 2400-2483.5 MHz
– 5855-5875 MHz
– 1670-1675 MHz / 1800-1805 MHz
– 3400-3600 MHz
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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Activities within CEPT/ECC (3)
• Category 2:
Frequency bands to be considered next or in case the studies for the category 1
bands will not show positive results:
(1) The current AMS allocation would need to be modified to allow Broadband DA2GC
(2) Compatibility studies with MLS, AM(R)S, RLANs and FSS have been completed
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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Activities within CEPT/ECC (4)
• Category 3:
Position on frequency bands still open/undecided
–
–
–
–
–
–
1350-1375 MHz / 1492-1517 MHz
1375-1400 MHz
1452-1492 MHz (under discussion within FM PT 50)
1900-1920 MHz / 2010-2025 MHz
3600-3800 MHz
5905-5925 MHz
• Category 4:
Frequency bands with high regulatory obstacles for an introduction of Broadband
DA2GC systems
29. - 30. June 2011
Ca-US-ECC Cooperation Meeting
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CEPT
ECC
Electronic Communications Committee
Thanking you for your attention
Any questions ?