Anticollision protocol for reading multiple RFID tags
US5883582A · kind A · utility
156Cited by
22References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Feb 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2431
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of reading multiple RFID tags located in a field of an interrogating antenna is based on periodic transmissions from the tags with large, non-transmission intervals between transmissions. The non-transmission intervals are fixed for a given tag, but are random between tags due to manufacturing tolerances in electrical components from which the tag is constructed, such that no coordination of transmissions from the interrogating antenna is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.