RFID tag and communication protocol for long range tag communications and power efficiency
US7044387B2 · kind B2 · utility
39Cited by
41References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2002 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Jun 22, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An RFID tag has a frequency agile RF transceiver that transmits data from the RFID tag to a reader and a direct sequence spread spectrum RF receiver that receives communications from the reader. Messages between the reader and the RFID tag are divided into frames, and each frame contains a frame header transmitted by the reader and at least one time slot containing data transmitted by the RFID tag. The frame header contains a hop sequence and a frequency in a hop sequence to be used by the RFID tag in transmitting data to the reader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.