UN conference reaches agreement on radio spectrum for global flight tracking
un.org
un.org
ADS-B (Broadcast) instead is broadcasting continuously on 1090MHz for reception by other aircraft and ground stations.
Globalstar require an additional piece of hardware to be added to each plane to then rebroadcast these signals onto their network http://www.globalstar.com/en/index.php?cid=6300
On the other hand, Aireon is going for the most ambitious option and the one this radio spectrum agreement relates to - launch new space based hardware on the Iridium NEXT satellites http://aireon.com/services/global-air-traffic-surveillance/
http://aviationweek.com/blog/iridium-and-aireon-talk-ads-b
http://www.icao.int/APAC/Meetings/2014%20ADSBSITF13/SP12_CNS...