Positioning system using radio signal sent from node

Details Positioning system using radio signal sent from node Positioning system using radio signal sent from node

2004-10-27

2009-12-01

Appiah, Charles N (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S404200, C455S456300, C455S440000, C455S457000, C455S503000, C342S387000, C342S464000, C342S386000, C701S207000

Reexamination Certificate

active

07627329

ABSTRACT:
To provide a method of measuring a position of a node by using a radio communication system which comprises the node to send a position measuring signal, and a plurality of base stations to receive radio signals from the node, the method including: the base stations watching signals from the node through a predetermined channel; at least one of the base stations sending a reference signal after receiving of the position measuring signal; at least two of the base stations measuring the reception timing of the position measuring signal and the reception timing of the reference signal; and calculating the position of the node by using the reception timing of the position measuring signal and the reference signal measured by the base stations which have received the reference signal, and position information of the base station which has received the position measuring signal.

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Ogino et al., “Integrated Wireless LAN Access System-Study on Location System”, http://koigakubo.hitachi.co.jp/˜cs/default—e.htm, IEICE (1) General Meeting, B-5-203 (2003), pp. 662:1-5.
Ogino et al., “Integrated Wireless LAN Access System-Study on Location Method”, Central Research Laboratory, Hitachi, Ltd., (DICOMO 2003), pp. 569-572:1-16.
Office Action from Japanese Patent Office for JP Patent Application No. JP2003-376797 dated May 27, 2008 with English translation.
Notification of Reason(s) for Refusal from the Japanese Patent Office dated Jun. 23, 2009, in Japanese with English translation.

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