Method and apparatus for switching between redundant hardware in a wireless data communication system
First Claim
1. A system for switching between redundant hardware in a wireless communication system, comprising:
- a first modulator unit including a first signal generator outputting a first signal containing data and a first processor coupled to the first signal generator for enabling and disabling transmission of the first signal;
a second redundant modulator unit including a second signal generator for outputting a second signal containing the same data and a second processor coupled to the second signal generator for enabling and disabling transmission of the second signal;
a first receiver coupled to the first processor that independently initiates transmission of the first signal according to the transmission from one of said first and second signals; and
a second receiver coupled to the second processor that independently initiates transmission of the second signal according to the transmission from one of said first and second signals.
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Abstract
A wireless communication system uses transmitted data signals to monitor and control redundant modulator hardware. A modulator unit signature identifying the modulator unit currently transmitting data is embedded into each data frame carried by the transmission signal. Each modulator unit can then independently monitor the transmission signal to determine which modulator is currently transmitting data. Each modulator unit then monitors the transmission signal in case the modulator unit actively generating the transmission signal fails. In a failure situation, the active modulator unit disconnects itself from the transmission circuity while the backup modulator unit independently connects to the transmission circuitry to begin active transmission.
50 Citations
19 Claims
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1. A system for switching between redundant hardware in a wireless communication system, comprising:
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a first modulator unit including a first signal generator outputting a first signal containing data and a first processor coupled to the first signal generator for enabling and disabling transmission of the first signal; a second redundant modulator unit including a second signal generator for outputting a second signal containing the same data and a second processor coupled to the second signal generator for enabling and disabling transmission of the second signal; a first receiver coupled to the first processor that independently initiates transmission of the first signal according to the transmission from one of said first and second signals; and a second receiver coupled to the second processor that independently initiates transmission of the second signal according to the transmission from one of said first and second signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for switching between a first modulator unit and a second redundant modulator unit in a wireless broadcast system, comprising:
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generating a first signal from the first modulator unit, the first signal containing data; generating a second signal from the second redundant modulator unit, the second signal containing the same data; broadcasting one of said first signal and said second signal over a wireless communication medium to a remote receiver; independently monitoring the broadcast signal with both the first and second modulator units; and selectively switching signal broadcasting between the first modulator unit and the second modulator unit according to the monitored broadcast signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for switching between redundant hardware in a wireless broadcast system, comprising:
multiple modulator units each including the following; a processor for combining data with an associated modulator unit signature; a subcarrier generator coupled to the processor for outputting a subcarrier signal containing both the data and modulator unit signature; a receiver coupled to both the processor and the subcarrier generator for monitoring broadcasts from one of said modulator units; and a relay coupled to the subcarrier generator for selectively enabling transmission of the subcarrier signal according to the monitored broadcast. - View Dependent Claims (19)
Specification