How it works

Inflight connectivity via OnAir enables passengers to use their own mobile phones or smartphone devices, just as they do on the ground. The aircraft is its own 'connected zone' and passengers connect via international roaming to the OnAir service, in much the same way they do when entering a foreign country.

Onboard system

·    A connectivity system is required, which is typically made of the following components:

−          For Mobile OnAir only:

  • A picocell, which is a miniature GSM cell
  • An onboard control equipment which ensures passengers’ GSM phones can only connect only to the on-board picocell and non GSM phones do not connect with terrestrial networks

−          For Internet OnAir only:

  • A wireless access point

−          For either service:

  • A server to manage the communications centrally, establishing calls over the air-to-ground link, and interfacing with aircraft systems
  • A satellite communications system (e.g. Inmarsat Swiftbroaband terminal) to allocate air-to-ground resources according to the demands of the server

All components of the system are provided either with the complete aircraft at delivery (linefit), or as a kit, including the antenna and satcom unit where necessary, plus documentation. Overhead signs are also installed to advise passengers on when they may use the Mobile OnAir service, as well as a control panel which enables cabin crew to manage the services.

Satellite link

OnAir uses Inmarsat's SwiftBroadband service and is therefore able to deliver high-speed, high-capacity voice and data solutions with the only truly global coverage.However, the onboard system has been designed to easily adapt to other air-ground link options, underlining the versatility of OnAir's technology.

SwitfBroadband supports the full range of voice and adata communications required for cabin and cockpit through one satcom system. The airbone equipment is specifically designed for the aeronautical environment, meaning minimal weight and drag additions. SwitfBroadband is available for cockpit services on new aircraft such as the A350 and B787, meaning cabin connectivity can be added without additional satcom.

After a successful first year of operation, it is clear SwiftBroadband provides more than enough capacity to meet passenger needs. Those needs will change and, SwiftBroadband capacity can be improved by increasing the number of channels available. An upgrade path is available from two to four SwiftBroadband channels. In August 2010, Inmarsat announced the upcoming launch of three Inmarsat-5 satellites, which will provide global Ka-band coverage. Global Xpress us scheduled for service entry at the end of 2014 and will address future bandwith needs.

Ground infrastructure

OnAir operates a ground network connected to mobile roaming partners, long-distance telephony providers and the Internet. The OnAir Network Operations Centre monitors and supports the service on all active aircraft on a 24x7 basis.