Rolling code security scheme for tag detection robustness
US9715804B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2016 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | May 22, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2488
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Systems (100) and methods (900) for detecting the presence of a security tag. The methods involve performing operations by a master pedestal of an EAS system to determine a first Tx/Rx scheme to be used during a first iteration of an EAS tag detection process based on (A) a first total number of time windows randomly selected from a plurality of total number of time windows in which an EAS exciter signal should be transmitted from at least one pedestal, and (B) first time windows randomly selected from a plurality of time windows in which the EAS exciter signal can be sent during the EAS tag detection process. Information specifying the first Tx/Rx scheme is communicated from the master pedestal to at least one slave pedestal. Transmit and receive operations are performed by the master and slave pedestals in accordance with the first Tx/Rx scheme.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.