Systems and methods for handover between space based and...

Details Systems and methods for handover between space based and... Systems and methods for handover between space based and...

H - Electricity

04

W

H04W 36/00 (2009.01) H04W 16/14 (2009.01) H04W 24/08 (2009.01) H04W 36/30 (2009.01)

Patent

CA 2518778

A satellite communications system includes a satellite that is configured to wirelessly communicate with radioterminals in a satellite coverage area over a satellite frequency band, and an ancillary terrestrial component that is configured to wirelessly communicate with radioterminals in the satellite coverage area over at least some of the satellite frequency band, to thereby terrestrially reuse at least some of the satellite frequency band. Wireless communications with a radioterminal are handed over from the ancillary terrestrial component to the satellite if the radioterminal transmit power exceeds a threshold, and a received satellite signal quality exceeds a threshold, even though the radioterminal is able to wirelessly communicate with the ancillary terrestrial component. Downlink wireless radiation that is received at the radioterminal from a satellite may be monitored to determine potential interference created by the uplink radiation of the radioterminal due to the terrestrial reuse of at least some of the satellite frequency band.

Selon la présente invention, un système de communication satellite comprend, d'une part, un satellite conçu pour communiquer sans fil avec des terminaux radio dans une zone de couverture satellite sur une bande de fréquence satellite et, d'autre part, un composant terrestre auxiliaire conçu pour communiquer sans fil avec des terminaux radio dans la zone de couverture satellite sur au moins une certaine partie de la bande de fréquence satellite, ce qui permet de réutiliser sur terre au moins une partie de ladite bande de fréquence satellite. Des communications sans fil avec un terminal radio sont transférées du composant terrestre auxiliaire au satellite, si la puissance de transmission du terminal radio et une qualité de signal satellite reçu excèdent respectivement un certain seuil, même lorsque le terminal radio peut communiquer sans fil avec le composant terrestre auxiliaire. Des rayonnements sans fil de liaison descendante reçus au niveau du terminal radio à partir d'un satellite peuvent être surveillés pour déterminer une interférence potentielle engendrée par les rayonnements de liaison montante du terminal radio en raison de la réutilisation terrestre d'au moins une certaine partie de la bande de fréquence satellite.

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