03-05-2012, 02:48 PM
AERONAUTICAL COMMUNICATIONS
AERONAUTICAL_COMMUNICATIONS.pdf (Size: 165.14 KB / Downloads: 37)
INTRODUCTION
The demand for making air traveling more 'pleasant, secure and
productive for passengers is one of the winning factors for airlines and aircraft
industry. Current trends are towards high data rate communication services, in
particular Internet applications. In an aeronautical scenario global coverage is
essential for providing continuous service. Therefore satellite communication
becomes indispensable, and together with the ever increasing data rate
requirements of applications, aeronautical satellite communication meets an
expansive market.
Wireless Cabin (IST -2001-37466) is looking into those radio access
technologies to be transported via satellite to terrestrial backbones . The project
will provide UMTS services, W-LAN IEEE 802.11 b and Blue tooth to the
cabin passengers. With the advent of new services a detailed investigation of
the expected traffic is necessary in order to plan the needed capacities to fulfill
the QoS demands. This paper will thus describe a methodology for the planning
of such system.
In the future, airliners will provide a variety of entertainment and
communications equipment to the passenger. Since people are becoming more
and more used to their own communications equipment, such as mobile phones
and laptops with Internet connection, either through a network interface card or
dial-in access through modems, business travelers will soon be demanding
wireless access to communication services.
Aeronautical Communications Seminar Report ‘03
WIRELESS CABIN ARCHITECTURE
So far, GSM telephony is prohibited in commercial aircraft due to
the uncertain certification situation and the expected high interference levels of
the TDMA technology. With the advent of spread spectrum systems such as
UMTS and W-LAN, and low power pico-cell access such as Blue tooth this
situation is likely to change, especially if new aircraft avionics technologies are
considered, or if the communications technologies are in line with aircraft
development as today
When wireless access technologies in aircraft cabins are envisaged
for passenger service, the most important standards for future use are
considered to be: UMTS with UTRAN air interface, Blue tooth, and W-LAN
IEEE 802.11 b. Of course, these access technologies will co-exist with each
other, beside conventional IP fixed wired networks. The wireless access
solution is compatible with other kinds of IFE, such as live TV on board or
provision of Internet access with dedicated installed hardware in the cabin seats.
Hence, it should not be seen as an alternative to wired architecture in an aircraft,
but as a complementary service for the passengers.
SATELLITE CONNECTION
Connection to telecom networks is considered to be achieved by
satellites with large coverage areas especially over oceanic regions during longhaul
flights. The service concept needs to take into account today's peculiarities
of satellite communications, thus it must cope with the available or in near
future available satellite technology, and interworking must be performed at
aircraft interface level with the satellite segment,
• Only restricted satellite data rates will be available in the near future; thus
the bandwidth that is requested by standard interfaces of the wireless
standards needs to be adapted to the available bandwidth (typically: 432
kb/s in down- link, 144 kb/s up-link (Inmarsat B- GANTM), or 5 Mb/s in
down-link, 1.5 Mb/s in up-link (Connexion by Boeing)). Furthermore,
dynamic bandwidth management is needed to allocate higher bit rates from
temporarily unused services to other service-
AERONAUTICAL_COMMUNICATIONS.pdf (Size: 165.14 KB / Downloads: 37)
INTRODUCTION
The demand for making air traveling more 'pleasant, secure and
productive for passengers is one of the winning factors for airlines and aircraft
industry. Current trends are towards high data rate communication services, in
particular Internet applications. In an aeronautical scenario global coverage is
essential for providing continuous service. Therefore satellite communication
becomes indispensable, and together with the ever increasing data rate
requirements of applications, aeronautical satellite communication meets an
expansive market.
Wireless Cabin (IST -2001-37466) is looking into those radio access
technologies to be transported via satellite to terrestrial backbones . The project
will provide UMTS services, W-LAN IEEE 802.11 b and Blue tooth to the
cabin passengers. With the advent of new services a detailed investigation of
the expected traffic is necessary in order to plan the needed capacities to fulfill
the QoS demands. This paper will thus describe a methodology for the planning
of such system.
In the future, airliners will provide a variety of entertainment and
communications equipment to the passenger. Since people are becoming more
and more used to their own communications equipment, such as mobile phones
and laptops with Internet connection, either through a network interface card or
dial-in access through modems, business travelers will soon be demanding
wireless access to communication services.
Aeronautical Communications Seminar Report ‘03
WIRELESS CABIN ARCHITECTURE
So far, GSM telephony is prohibited in commercial aircraft due to
the uncertain certification situation and the expected high interference levels of
the TDMA technology. With the advent of spread spectrum systems such as
UMTS and W-LAN, and low power pico-cell access such as Blue tooth this
situation is likely to change, especially if new aircraft avionics technologies are
considered, or if the communications technologies are in line with aircraft
development as today
When wireless access technologies in aircraft cabins are envisaged
for passenger service, the most important standards for future use are
considered to be: UMTS with UTRAN air interface, Blue tooth, and W-LAN
IEEE 802.11 b. Of course, these access technologies will co-exist with each
other, beside conventional IP fixed wired networks. The wireless access
solution is compatible with other kinds of IFE, such as live TV on board or
provision of Internet access with dedicated installed hardware in the cabin seats.
Hence, it should not be seen as an alternative to wired architecture in an aircraft,
but as a complementary service for the passengers.
SATELLITE CONNECTION
Connection to telecom networks is considered to be achieved by
satellites with large coverage areas especially over oceanic regions during longhaul
flights. The service concept needs to take into account today's peculiarities
of satellite communications, thus it must cope with the available or in near
future available satellite technology, and interworking must be performed at
aircraft interface level with the satellite segment,
• Only restricted satellite data rates will be available in the near future; thus
the bandwidth that is requested by standard interfaces of the wireless
standards needs to be adapted to the available bandwidth (typically: 432
kb/s in down- link, 144 kb/s up-link (Inmarsat B- GANTM), or 5 Mb/s in
down-link, 1.5 Mb/s in up-link (Connexion by Boeing)). Furthermore,
dynamic bandwidth management is needed to allocate higher bit rates from
temporarily unused services to other service-