Wireless connectivity for sensors
First Claim
1. A wireless access point for communicating messages in an electronic article surveillance network, the electronic article surveillance network including at least one electronic article surveillance sensor hard-wired to at least one wireless device node, the wireless access point comprising:
- a wired communication interface configured to receive a message, the message including a sub-layer address corresponding to an electronic article surveillance sensor;
a wireless communication interface configured to;
broadcast the message; and
receive an acknowledgement of the broadcast message, the acknowledgment originating from the electronic article surveillance sensor corresponding to the sub-layer address;
a universal asynchronous receiver/transmitter buffer configured to receive the message through the wired communication interface, the message having been received as a series of data packets;
a radio frequency data transfer buffer configured to store data packets to be broadcast through the wireless communication interface;
a serial data transfer buffer configured to transfer data packets between the universal asynchronous receiver/transmitter buffer and the radio frequency data transfer buffer;
a controller electrically coupled to the wired communication interface and to the wireless communication interface, the controller configured to;
transfer the message between the wired communication interface and the wireless communication interface in bursts; and
a predictor configured to;
measure a serial idle time between bursts;
calculate a moving average of the measured serial idle time between bursts;
adaptively predict a serial idle trigger based on the moving average of the measured serial idle time between bursts; and
responsive to the serial idle time between bursts reaching the serial idle trigger, transferring data packets from the serial data transfer buffer to the radio frequency data transfer buffer.
6 Assignments
0 Petitions
Accused Products
Abstract
A wireless access point communicates messages in an electronic article surveillance (EAS) network. The EAS network includes at least one EAS sensor hard-wired to at least one wireless device node. The wireless access point includes a wired communication interface, a wireless communication interface and a controller. The controller is electrically coupled to the wired communication interface and to the wireless communication interface. The wired communication interface operates to receive a message. The message includes a sub-layer address corresponding to an EAS sensor. The wireless communication interface operates to broadcast the message and to receive an acknowledgement of the broadcast message. The acknowledgment originates from the EAS sensor corresponding to the sub-layer address. The controller operates to transfer the message between the wired communication interface and the wireless communication interface.
7 Citations
20 Claims
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1. A wireless access point for communicating messages in an electronic article surveillance network, the electronic article surveillance network including at least one electronic article surveillance sensor hard-wired to at least one wireless device node, the wireless access point comprising:
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a wired communication interface configured to receive a message, the message including a sub-layer address corresponding to an electronic article surveillance sensor; a wireless communication interface configured to; broadcast the message; and receive an acknowledgement of the broadcast message, the acknowledgment originating from the electronic article surveillance sensor corresponding to the sub-layer address; a universal asynchronous receiver/transmitter buffer configured to receive the message through the wired communication interface, the message having been received as a series of data packets; a radio frequency data transfer buffer configured to store data packets to be broadcast through the wireless communication interface; a serial data transfer buffer configured to transfer data packets between the universal asynchronous receiver/transmitter buffer and the radio frequency data transfer buffer; a controller electrically coupled to the wired communication interface and to the wireless communication interface, the controller configured to; transfer the message between the wired communication interface and the wireless communication interface in bursts; and a predictor configured to; measure a serial idle time between bursts; calculate a moving average of the measured serial idle time between bursts; adaptively predict a serial idle trigger based on the moving average of the measured serial idle time between bursts; and responsive to the serial idle time between bursts reaching the serial idle trigger, transferring data packets from the serial data transfer buffer to the radio frequency data transfer buffer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electronic article surveillance network supporting at least one electronic article surveillance sensor having a corresponding sub-layer address, the electronic article surveillance network comprising:
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an access point including; a first wired communication interface configured to receive a message; a first wireless communication interface in communication with the first wired communication interface; a universal asynchronous receiver/transmitter buffer configured to receive the message through the first wired communication interface, the message having been received as a series of data packets; a radio frequency data transfer buffer configured to store data packets to be broadcast through the first wireless communication interface; and a serial data transfer buffer configured to transfer data packets between the universal asynchronous receiver/transmitter buffer and the radio frequency data transfer buffer; the access point configured to; receive the message through the first wired communication interface, the message including the sub-layer address corresponding to an electronic article surveillance sensor; transfer the message from the first wired communication interface to a first wireless communication interface in bursts; measure a serial idle time between bursts; calculate a moving average of the measured serial idle time between bursts; and adaptively predict a serial idle trigger based on the moving average of the measured serial idle time between bursts; responsive to the serial idle time between bursts reaching the serial idle trigger, transfer data packets from the serial data transfer buffer to the radio frequency data transfer buffer; broadcast the message through the first wireless communication interface; and receive an acknowledgement of the broadcast message through the first wireless communication interface; and the at least one wireless device node having a wireless network layer address, the at least one wireless device node wirelessly coupled to the access point and hard-wired to the at least electronic article surveillance sensor, the at least one wireless device node configured to; receive the broadcast message through a second wireless communication interface; forward the broadcast message through a second wired communication interface to the electronic article surveillance sensor corresponding to the sub-layer address included in the received broadcast message; receive an acknowledgement of the broadcast message through the second wired communication interface from the electronic article surveillance sensor; and forward the acknowledgement of the broadcast message through the second wireless communication interface. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for communicating messages in an electronic article surveillance network, the electronic article surveillance network including at least one electronic article surveillance sensor hard-wired to at least one wireless device node, the method comprising:
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receiving a message through a wired communication interface, the message including a sub-layer address corresponding to an electronic article surveillance sensor; transferring the message from the wired communication interface to a wireless communication interface in bursts; measuring a serial idle time between bursts; calculating a moving average of the measured serial idle time between bursts; adaptively predicting a serial idle trigger based on the moving average of the measured serial idle time between bursts; responsive to the serial idle time between bursts reaching the serial idle trigger, transferring data packets from a serial data transfer buffer to a radio frequency data transfer buffer; broadcasting the message through the wireless communication interface; and receiving an acknowledgement of the broadcast message through the wireless communication interface, the acknowledgment originating from the electronic article surveillance sensor corresponding to the sub-layer address. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification