Wireless Networks inAircraft

Prepared By:Sunny chavda and Pankaj Khodifad

B.Tech 6th Semester,Electronics & Communication Department ,Institute of Technology, Nirma University.

Content

• Current Issues • Services• Wireless Cabin architecture• Pico cell • Protocols• QoS classes

Current Issues

• Aircraft are last remaining islands• FCC banned cellular phones -due to channel reuse -output power of the mobile handset• FAA also prohibits in-flight use of wireless

devices -Exceed the permitted interference -Adversely affect the navigation system

• FAA also regulates all PEDs (like iPods, DVD players) during flight

• People are becoming more and more used to personalized equipments

-clear demand for a wireless access through users’ own equipment• Also useful for airline personnel• Cost massive wired network in an aircraft is

saved

• In the past -only a few kbps -used for voice and for low rate communication• Now, links of Mbps are available to allow for

variety of services and applications• promising new market is opened for

communication service providers/operators and airline operators

SERVICES

• Most important standards -GSM, UMTS with UTRAN air interface, Bluetooth, and

W-LAN - need to co-exist with each other and wired IP

installations• For mobile telephony, circuit-switched (CS) or packet

switched(PS) services are supported• For IP services , - typical protocols from business and home environment are supported

Wireless Cabin architecture

• Cabin Segment• Transport Segment • Ground Segment

Cabin Segment

• Local Access domain• Service Integration domain

Local Access domain

• UTRAN/GSM radio access segment.• WLAN segment.• Bluetooth access segments.

Service Integration domain

• Network functionalities of the UMTS network and IP

• Authentication• Admission control • Accounting • Mobility support• Quality of Service (QoS) support• interfaces towards the satellite transport

network.

WirelessCabin architecture

WirelessCabin functional architecture

WirelessCabin architecture implementation

• Connexion by Boeing.• phased array antenna Ku band antenna • leased satellite transponders, and ground

stations.• downlink speeds of up to 20Mbit/s • uplink speeds up to 2 Mbit/s.• service began on Lufthansa German Airlines in

May 17, 2004.

Modern wireless network in aircraft

Modern wireless network in aircraft

• Aircell.• Direct air-to-ground technology.• 3 MHz air-to-ground spectrum in 800Mhz

band.• Working with 100 towers in USA.• service began on American Airlines in July

2008.

Picocell

• base station typically covering a small area

Protocols

• Internet Protocol(IP).• Remote Authentication Dial In User Service

(RADIUS).• Session Initiation Protocol (SIP).• Resource Reservation Protocol (RSVP).

QoS classes

• WirelessCabin first class (Conversational class: real time/delay intolerant).

• WirelessCabin second class (Streaming class: real time/delay tolerant).

• WirelessCabin third class (Interactive class: non real time/interactive).

• WirelessCabin Fourth class (Background class).

Reference• http://en.wikipedia.org/wiki/Air-ground_radiotelephone_service• http://en.wikipedia.org/wiki/Connexion_by_Boeing• http://en.wikipedia.org/wiki/Aircell• http://en.wikipedia.org/wiki/Gogo_Inflight_Internet• "System Architecture for 3G Wireless Networks in Aircraft " by Axel Jahn,

Cristina Párraga Niebla• http://123seminarsonly.com/Seminar-Reports/007/52769777-

AERONAUTICAL-COMMUNICATION.pptx• "Coverage and Capacity Planning for Aircraft In-Cabin Wireless

Heterogeneous Networks" by Cristina Párraga Niebla

Important Terms

• public switched telephone network (PSTN)• Internet service provider (ISP)• public land mobile network (PLMN)• Universal Mobile Telecommunications System (UMTS)• Geostationary Earth Orbit (GEO)• low Earth orbit (LEO)• L band spectrum: 40 to 60 GHz• Ku band spectrum 10.7 to 12.75 GHz• Aircraft Communications Addressing and Reporting

System (ACARS)• Aeronautical Radio, Incorporated (ARINC)

Thank you very muchHave a nice day…