Patents
US 11120232 B2: Early collision detection and handling in CDMA-based RFID systems
- Granted
- 2021-09-14
- Filed
- 2019-01-28 application 16963638
- Type
- Utility · 21 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method, system and computer program product for enabling early collision detection and handling in Code Division Multiple Access (CDMA)-based radio-frequency identification (RFID) systems. A tag receives an instruction from a reader to reflect either a single encoded bit or multiple encoded bits. The tag then reflects either the single encoded bit or the multiple encoded bits to the reader. The reader decodes the received encoded bit(s) from the tag, where the decoded bit(s) are placed in a vector or matrix by the reader. The vector/matrix is then transmitted to the tag, which determines if the reflected bit(s) agree with the corresponding bit(s) in the vector/matrix thereby indicating whether the reflected bit(s) were read successfully by the reader. The tag will then enter a no reflection mode in response to a disagreement between the reflected bit(s) with the corresponding bit(s) in the vector/matrix thereby preventing collisions from occurring.
Source: PVGPATDIS, file of 2026-04-10 (ipg210914.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Texas State University 22 patents | US company or organization | San Marcos, TX | Texas State University College or university EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Ramsey Doany | San Marcos, TX | 1 | PVGPATDIS, file of 2026-04-10 | |
| Harold Stern | San Marcos, TX | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G06K | Graphical data reading ; presentation of data; record carriers; handling record carriers | G06K7/10019 | PVGPATDIS, file of 2026-04-10 |
| G01S | Radio direction-finding; radio navigation; determining distance or velocity by use of radio waves; locating or presence-detecting by use of the reflection or reradiation of radio waves; analogous arrangements using other waves | G01S13/74 | PVGPATDIS, file of 2026-04-10 |
| G06F | Electric digital data processing | G06F12/00 | PVGPATDIS, file of 2026-04-10 |
| H04Q | Selecting | H04Q5/22 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.