Dual site supervision for a control channel cellular radio used in a fire alarm reporting system
First Claim
1. A method of operating a control channel cellular radio transmitter for reporting a status of a fire alarm system comprising:
- scanning available cellular control channels and measuring the signal strength of each cellular control channel;
selecting a cellular control channel with the strongest signal strength which is verified as being available for the assigned carrier to report a status of the fire alarm system;
selecting a cellular control channel with a second strongest signal strength which is also verified as being available for the assigned carrier to report a status of the fire alarm system;
transmitting a cellular radio message on the status of the fire alarm system over either of the cellular control channel with the strongest signal strength or the cellular control channel with the second strongest signal strength.
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Accused Products
Abstract
Dual site supervision is provided for a control channel cellular radio for a fire alarm reporting system that uses logic that causes a control channel cellular transceiver to operate in a nonstandard manner and to use a different and second cellular base station or site that the unit would not normally select operating pursuant to a standard cell phone software module. The logic causes the control channel cellular transceiver to monitor and test through more than one cell base station or site, thereby meeting the dual communication path supervision requirement for UL listed communications systems for stand alone fire alarm reporting systems. The available cellular control channels are first scanned, and the signal strength of each cellular control channel is measured. Then the cellular control channel with the strongest signal strength and the cellular control channel with the second strongest signal strength which are verified as being available for the assigned carrier are selected to report the status of the fire alarm system. A cellular radio message on the status of the fire alarm system is transmitted over the cellular control channel with the strongest signal strength, or if unavailable over the cellular control channel with the second strongest signal strength.
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Citations
12 Claims
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1. A method of operating a control channel cellular radio transmitter for reporting a status of a fire alarm system comprising:
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scanning available cellular control channels and measuring the signal strength of each cellular control channel; selecting a cellular control channel with the strongest signal strength which is verified as being available for the assigned carrier to report a status of the fire alarm system; selecting a cellular control channel with a second strongest signal strength which is also verified as being available for the assigned carrier to report a status of the fire alarm system; transmitting a cellular radio message on the status of the fire alarm system over either of the cellular control channel with the strongest signal strength or the cellular control channel with the second strongest signal strength. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for operating a control channel cellular radio transmitter for reporting a status of a fire alarm system comprising:
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means for scanning available cellular control channels and measuring the signal strength of each cellular control channel; means for selecting a cellular control channel with the strongest signal strength which is verified as being available for the assigned carrier to report a status of the fire alarm system; means for selecting a cellular control channel with a second strongest signal strength which is also verified as being available for the assigned carrier to report a status of the fire alarm system; means for transmitting a cellular radio message on the status of the fire alarm system over either of the cellular control channel with the strongest signal strength or the cellular control channel with the second strongest signal strength. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification