| 摘要 |
There is provided a cellular communications system, comprising a space based system comprising at least one satellite, each satellite comprising at least one antenna and establishing a first set of cells and transmitting and receiving waveforms using at least a first portion of at least one predetermined frequency band used by the first set of cells, a ground based system comprising at least one base transceiver station (BTS), each BTS establishin g a second set of cells and transmitting and receiving utilizing at least a second portion of the one predetermined frequency band, the space based and ground based systems functioning autonomously and at least one of using and reusing at least a portion of spectrum from the same at least one predetermined frequency band to be used as at least one of the uplink and downlink frequency channel from any of the frequencies within the at least one predetermined frequency band, at least one subscriber terminal communicating with at least one of the space based system and the ground based system when located in at least one of the first and second set of cells and at least one radio resource manager determining available communication link s between the at least one subscriber terminal and at least one of the space based system and ground basedsystems.
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