WO2004106964A3
Self calibration of signal strength location system
Abstract
A system for locating mobile units in a data communications system based on signal strength measurements of mobile unit transmissions is calibrated for variations in mobile unit transmitter power by determining range of a mobile unit from an access point using two way time ranging. The time ranging is compared to the value for range based on signal strength and a correction value for the mobile unit is updated based on the difference between range based on time ranging and the range based on signal strength.
Term
No projected expiry on record.
- Priority
- Filed
- Published
- Today
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| US2003034851A1 | Cites | United States of America | A | International search |
| US6014102A | Cites | United States of America | A | International search |
| US6240124B1 | Cites | United States of America | A | International search |
| US6259912B1 | Cites | United States of America | A | International search |
9 members in 5 offices
Priority claims1
| Document | Office | Kind | Date |
|---|---|---|---|
| 47309603 | United States of America | P |
Members9
| Document | Office | Kind | |
|---|---|---|---|
| WO2004106964A2 | World Intellectual Property Organization (WIPO) | A2 | |
| US2004266465A1 | United States of America | A1 | |
| WO2004106964A3This record | World Intellectual Property Organization (WIPO) | A3 | |
| US7065325B2 | United States of America | B2 | |
| EP1683285A2 | European Patent Office (EPO) | A2 | |
| CN1830163A | China | A | |
| JP2007500491A | Japan | A | |
| JP4374021B2 | Japan | B2 | |
| CN1830163B | China | B |
7 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Wipo information: published in national officeWWP | WWP | |
| Wipo information: entry into national phaseWWE | WWE | |
| Wipo information: entry into national phaseWWE | WWE | |
| Wipo information: entry into national phaseWWE | WWE | |
| Ep: the epo has been informed by wipo that ep was designated in this application121 | 121 | |
| Designated statesAK | AK | |
| Designated countries for regional patentsAL | AL |
Numbers
- Application
- 16161
Titles2
- English
- SELF CALIBRATION OF SIGNAL STRENGTH LOCATION SYSTEM
- French
- ETALONNAGE AUTOMATIQUE D'UN SYSTEME DE LOCALISATION FONDE SUR L'INTENSITE DU SIGNAL
Classification
- CPC, 1
- G01N33/6842
- IPC, 3
- G01S
- G01S5 14
- H04Q7 00
Designated states4
- Regional, 4
- Zimbabwe
- Turkmenistan
- Türkiye
- Togo