Urgent messages and power-up in frequency hopping system for intemittent transmission
First Claim
1. A telemetry system comprising:
- a plurality of transmitters, each of which is for transmitting intermittently at various frequencies;
(a) routine transmissions, at first time intervals, (b) urgent transmissions, in response to urgency, at urgent transmission opportunities at second time intervals, and (c) power-up transmissions at third time intervals, wherein each of said plurality of transmitters is for transmitting independently of any apparatus for receiving any of said transmissions and independently of any of said plurality of transmitters, anda receiver for holding, simultaneously for each of said plurality of transmitters, time data indicative of an expected time of at least one future urgent transmission opportunity.
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Abstract
A wireless telemetry system includes many radio transmitters using frequency-hopping carriers for intermittently transmitting very short messages indicative of status of stimuli associated with the transmitters. The transmitters can transmit independently of any receiver for receiving from the transmitters and independently of each other. Transmission frequency and time between transmissions are varied according to time-frequency patterns that can be different for each transmitter. Urgent messages, such as alarms, are transmitted at transmission opportunities at intervals smaller than routine transmissions. The transmission opportunities are also according to a time-frequency pattern. Power-up transmissions carry information about future transmission opportunities and/or routine transmissions. Power-up transmissions can also carry information about time-frequency pattern for controlling routine transmissions and/or transmission opportunities. The system comprises a receiver for receiving from the transmitters. The receiver holds data indicative of time and frequency of future routine transmissions and transmission opportunities simultaneously for each of the transmitters.
83 Citations
20 Claims
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1. A telemetry system comprising:
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a plurality of transmitters, each of which is for transmitting intermittently at various frequencies;
(a) routine transmissions, at first time intervals, (b) urgent transmissions, in response to urgency, at urgent transmission opportunities at second time intervals, and (c) power-up transmissions at third time intervals, wherein each of said plurality of transmitters is for transmitting independently of any apparatus for receiving any of said transmissions and independently of any of said plurality of transmitters, anda receiver for holding, simultaneously for each of said plurality of transmitters, time data indicative of an expected time of at least one future urgent transmission opportunity. - View Dependent Claims (2, 3, 4, 5)
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6. A plurality of transmitters, each of which comprises:
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a circuit for transmitting intermittently at various frequencies;
(a) routine transmissions, at first time intervals, (b) urgent transmissions, in response to urgency, at urgent transmission opportunities at second time intervals, and (c) power-up transmissions at third time intervals, andwherein each of said plurality of transmitters is for transmitting independently of any apparatus for receiving any of said transmissions and independently of any of said plurality of transmitters. - View Dependent Claims (7, 8, 9, 10)
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11. A plurality of transmitters, each of which comprises:
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a circuit for transmitting intermittently;
(a) routine transmissions, at first time intervals, and (b) urgent transmissions, in response to urgency, at urgent transmission opportunities at second time intervals, and (c) power-up transmissions;
wherein each of said plurality of transmitters is for transmitting independently of any apparatus for receiving any of said transmissions and independently of any of said plurality of transmitters, andwherein said power-up transmissions comprise indicium of at least one of;
(1) at least one of said urgent transmission opportunities, and (2) time and frequency of at least one of said routine transmissions. - View Dependent Claims (12, 13, 14, 15)
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16. A plurality of transmitters, each of which comprises:
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a circuit for transmitting intermittently at various transmission frequencies;
(a) routine transmissions, at first time intervals, and (b) urgent transmissions, in response to urgency, at urgent transmission opportunities at second time intervals, and (c) power-up transmissions;
wherein said transmitter is for transmitting independently of any apparatus capable of receiving any of said transmissions, andwherein said power-up transmissions are in synchronization with at least one of;
(1) at least one of said urgent transmission opportunities, and (2) at least one of said routine transmissions. - View Dependent Claims (17, 18, 19, 20)
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Specification