US 2010/0167758 A1 · RADIO POSITIONING SYSTEM AND COORDINATE CONFIGURING METHOD

Abstract

A radio positioning system includes a plurality of base stations and a radio terminal. Each of the base stations includes a reference signal generating portion which generates a reference signal for positioning, a transmission portion which transmits the reference signal, a reception portion which receives a signal from its outside, a positioning portion which calculates a position relative to the radio terminal or base station as a signal sender based on the received signal, and a reference signal return portion which receives a reference signal transmitted from another base station and returns the reference signal to the another base station. The radio terminal includes a terminal reception portion which receives the reference signal, and a terminal transmission portion which returns the received reference signal. A reference signal transmitted by a first base station of the base stations is received and returned by the reference signal return portion in a second base station, the returned reference signal is received by the reception portion in the first base station, and the positioning portion in the first base station measures a position relative to the second base station based on the received reference signal.

Claims16

Dependent claims

A radio positioning system comprising:

a plurality of base stations;
and
a radio terminal,
wherein each of the base stations includes a reference signal generating portion which generates a reference signal for positioning, a transmission portion which transmits the reference signal, a reception portion which receives a signal from its outside, a positioning portion which calculates a position relative to the radio terminal or base station as a signal sender based on the received signal, and a reference signal return portion which receives a reference signal transmitted from another base station and returns the reference signal to the another base station;
wherein the radio terminal includes a terminal reception portion which receives the reference signal, and a terminal transmission portion which returns the received reference signal;
and
wherein a reference signal transmitted by a first base station of the base stations is received and returned by the reference signal return portion in a second base station, the returned reference signal is received by the reception portion in the first base station, and the positioning portion in the first base station measures a position relative to the second base station based on the received reference signal.

4 more elements

A coordinate configuring method comprising:

retrieving whether there is any adjacent base station or not by a reference base station;
confirming whether position information concerned with the adjacent base station is present in a base station list held in the reference base station or not by the reference base station, when there is the adjacent base station;
retrieving whether there is any relative station relative to the reference base station in the base station list when the position information concerned with the adjacent base station is present in the base station list held by the reference base station;
retrieving whether there is any adjacent base station not serving under the reference base station when there is no relative station in the base station list;
copying the base station list held by the adjacent base station not serving under the reference base station when there is the adjacent base station not serving under the reference base station;
measuring a position relative to the adjacent base station;
updating the base station list held by the reference base station by using the positioning result of the adjacent base station and the copied base station list;
and
broadcasting the updated base station list through a network.

6 more elements

Dependencies are inferred from the claim text.

Radio positioning system and coordinate configuring method

Life of this patent

Radio positioning system and coordinate configuring method

Life of this patent

Abstract

Claims16