Radio communication device and method of measuring distance
US6611233B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Jun 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S11/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radio communication device and a method of measuring distance is capable of easily obtaining a distance and a positional relation between a portable telephone 3A and a portable telephone 3B directly, not via a base station. The portable telephone 3A directly transmits a measurement pilot signal used for calculating a distance between its current position and the portable telephone 3B, to the portable telephone 3B via a radio interface for short distance 15, receives a pilot response signal in response to the measurement pilot signal from the portable telephone 3B, and then calculates a distance between the portable telephone 3A and the portable telephone 3B based on the pilot response signal and the measurement pilot signal, thus making it possible to easily obtain a distance and a positional relation between itself and the portable telephone 3B by directly communicating the pilot response signal and measurement pilot signal with the portable telephone 3B, not via the base station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.