Positioning support device and positioning support method
US8472975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2010 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jan 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Highly-accurate approximate positional information is transmitted to a communication terminal. An approximate positional information database of a server included in a positioning support system includes approximate positional information used for positioning calculation at the communication terminal and which indicates a position of a cell in which the communication terminal is located and a cell identifier identifying the cell, with approximate positional information and the cell being associated with each other. Based on a positioning information transmission request which includes a cell and which is transmitted from the communication terminal, approximate positional information stored in the approximate positional information database is acquired and transmitted from a communication unit to the communication terminal. Positioning result information indicating a result of the positioning calculation transmitted from the communication terminal is received and, based on this information, approximate positional information stored in the approximate positional information database is updated by a control unit. The accuracy of approximate positional information is enhanced due to th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.