HANDOVER BETWEEN SATELLITES USING A SINGLE MODEM
First Claim
Patent Images
1. A method for communication, comprising:
- in a first earth station that transmits signals to a second earth station via a first satellite, initiating a handover from the first satellite to a second satellite by transmitting the signals via both the first satellite and the second satellite, including transmitting a handover command and a synchronization signal; and
in the second earth station, receiving the handover command via the first satellite and, in response to the handover command, switching to receive the signals via the second satellite and synchronizing to the signal received via the second satellite using the synchronization signal.
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Abstract
A method for communication includes, in a first earth station (28A) that transmits signals to a second earth station (28B) via a first satellite (24A), initiating a handover from the first satellite to a second satellite (24B) by transmitting the signals via both the first satellite and the second satellite, including transmitting a handover command and a synchronization signal. The handover command is received in the second earth station via the first satellite. In response to the handover command, a switch is made to receive the signals via the second satellite and synchronize to the signal received via the second satellite using the synchronization signal.
21 Citations
19 Claims
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1. A method for communication, comprising:
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in a first earth station that transmits signals to a second earth station via a first satellite, initiating a handover from the first satellite to a second satellite by transmitting the signals via both the first satellite and the second satellite, including transmitting a handover command and a synchronization signal; and in the second earth station, receiving the handover command via the first satellite and, in response to the handover command, switching to receive the signals via the second satellite and synchronizing to the signal received via the second satellite using the synchronization signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A communication system, comprising:
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a first earth station, which is configured to transmit signals via a first satellite, and to initiate a handover from the first satellite to a second satellite by transmitting the signals via both the first satellite and the second satellite, including transmitting a handover command and a synchronization signal; and a second earth station, which is configured to receive the handover command via the first satellite and, in response to the handover command, to switch to receive the signals via the second satellite and to synchronize to the signal received via the second satellite using the synchronization signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An earth station, comprising:
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a transmitter; and a control unit, which is configured to transmit signals using the transmitter via a first satellite, and to initiate a handover from the first satellite to a second satellite by transmitting the signals using the transmitter via both the first satellite and the second satellite, including transmitting a handover command and a synchronization signal, so as to cause a remote earth station to receive the handover command via the first satellite and, in response to the handover command, to switch to receive the signals via the second satellite and to synchronize to the signal received via the second satellite using the synchronization signal.
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18. An earth station, comprising:
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a receiver; and a control unit, which is configured to receive signals using the receiver via a first satellite, including receiving a handover command and a synchronization signal, and, in response to the handover command, to switch to receive the signals using the receiver via the second satellite and to synchronize to the signal received via the second satellite using the synchronization signal. - View Dependent Claims (19)
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Specification