WIRELESS DATA COMMUNICATION SYSTEM HAVING RADIO FREQUENCY DEVICES, AND RELATED OPERATING METHODS FOR DISABLING A TRANSMIT MODE
First Claim
1. A method of managing transmissions in a wireless system having a wireless device and at least one wireless access device, the method comprising:
- the wireless device receiving keep-alive beacons during a first period of time;
operating the wireless device in a transmit mode during the first period of time;
the wireless device receiving no keep-alive beacons during a second period of time that follows the first period of time; and
operating the wireless device in a standby mode during the second period of time.
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Accused Products
Abstract
A wireless system suitable for use as a radio frequency (RF) locationing or presence detection system includes at least one wireless access device and at least wireless device, such as an active RF tag, corresponding to an item or asset of interest. A method of managing RF transmissions by the wireless devices is provided. The method involves the wireless device receiving keep-alive beacons during a first period of time. During this first period of time, the wireless device is operated in a transmit mode. During a second period of time that follows the first period of time, the wireless device receives no keep-alive beacons. During this second period of time, the wireless device is operated in a standby mode such that RF transmissions are disabled.
29 Citations
20 Claims
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1. A method of managing transmissions in a wireless system having a wireless device and at least one wireless access device, the method comprising:
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the wireless device receiving keep-alive beacons during a first period of time; operating the wireless device in a transmit mode during the first period of time; the wireless device receiving no keep-alive beacons during a second period of time that follows the first period of time; and operating the wireless device in a standby mode during the second period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless device comprising:
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an RF module configured to transmit and receive wireless signals; and a processor coupled to the RF module, and configured to; enable wireless transmission by the RF module in response to the RF module receiving an enable message from a wireless access device; detect a mode switching condition; and disable wireless transmission by the RF module in response to detection of the mode switching condition;
whereinthe mode switching condition is associated with the RF module receiving no enable messages. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A wireless data communication system comprising:
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one or more wireless access devices, each configured to transmit keep-alive beacons to support operation of the wireless data communication system in a transmit mode; and a radio frequency (RF) device configured to support operation of the wireless data communication system in the transmit mode for as long as it receives keep-alive beacons from any of the one or more wireless access devices, and to support operation of the wireless data communication system in a standby mode if it no longer receives any keep-alive beacons. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification