Radio communication system, mobile terminal unit thereof, and azimuth determining method
First Claim
1. A radio communication system comprising a transmitting station which transmits an azimuth designation signal having directivity toward a predetermined reference azimuth, and a plurality of transmitting/receiving stations which can receive said azimuth designation signal transmitted from said transmitting station,wherein a target transmitting/receiving station, included in said plurality of transmitting/receiving stations, comprises:
- a receiving section that receives said azimuth designation signal transmitted from said transmitting station;
an arrival direction obtaining section that obtains an arrival direction of said azimuth designation signal received by said receiving section;
an azimuth designation signal generating section that generates a new azimuth designation signal having directivity in a direction determined by said arrival direction of said azimuth designation signal obtained by said arrival direction obtaining section; and
a transmitting section that transmits said new azimuth designation signal generated by said azimuth designation signal generating section, in such a manner that said new azimuth designation signal has a directivity in a direction designated by said new azimuth designation signal.
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Accused Products
Abstract
Disclosed are a mobile station unit which can obtain azimuth information with a simple construction and a radio communication system including the mobile terminal unit. According to the present invention, in a terminal station, an arrival direction obtaining section 203 obtains an arrival direction of a received azimuth designation signal from a reference station or another terminal station using an arithmetic operation or the like. A transmitting direction forming section 204 determines the direction opposite to the arrival direction obtained by the arrival direction obtaining section 203 as a transmitting direction. A reference azimuth detecting section 207 detects the transmitting direction determined by the transmitting direction forming section 204 as a reference azimuth. An azimuth designation signal generating section 205 generates an azimuth designation signal so as to radiate radio waves having directivity in the transmitting direction determined by the transmitting direction forming section 204.
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Citations
23 Claims
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1. A radio communication system comprising a transmitting station which transmits an azimuth designation signal having directivity toward a predetermined reference azimuth, and a plurality of transmitting/receiving stations which can receive said azimuth designation signal transmitted from said transmitting station,
wherein a target transmitting/receiving station, included in said plurality of transmitting/receiving stations, comprises: -
a receiving section that receives said azimuth designation signal transmitted from said transmitting station; an arrival direction obtaining section that obtains an arrival direction of said azimuth designation signal received by said receiving section; an azimuth designation signal generating section that generates a new azimuth designation signal having directivity in a direction determined by said arrival direction of said azimuth designation signal obtained by said arrival direction obtaining section; and a transmitting section that transmits said new azimuth designation signal generated by said azimuth designation signal generating section, in such a manner that said new azimuth designation signal has a directivity in a direction designated by said new azimuth designation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An azimuth determining method, using a plurality of transmitting/receiving stations arranged in a given area, for determining an azimuth in one or more of said transmitting/receiving stations, said method comprising:
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in a transmitting station, transmitting an azimuth designation signal so as to have directivity toward a predetermined reference azimuth; in said transmitting/receiving station, receiving said azimuth designation signal; obtaining an arrival direction of said azimuth designation signal; generating a new azimuth designation signal having directivity in a direction determined by said arrival direction; transmitting said new generated azimuth designation signal; and specifying said reference azimuth on the basis of said arrival directions of said azimuth designation signals transmitted from said transmitting station and said transmitting/receiving station(s), and determining an azimuth on the basis of said specified reference azimuth.
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15. A transmitting/receiving station comprising:
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a receiving section that receives an azimuth designation signal, which is transmitted from a transmitting station so as to have directivity in a previously set reference azimuth; an arrival direction obtaining section that obtains an arrival direction of said azimuth designation signal received by said receiving section; an azimuth designation signal generating section that generates a new azimuth designation signal having directivity in a direction determined by said arrival direction of said azimuth designation signal; a reference azimuth specifying section that detects the direction of the directivity of said new azimuth designation signal generated by said azimuth designation signal generating section as a reference azimuth; and a transmitting section that transmits said new azimuth designation signal generated by said azimuth designation signal generating section so as to have directivity in a direction designated by said new azimuth designation signal. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A transmitting station for transmitting an azimuth designation signal having directivity toward a predetermined reference azimuth, said transmitting station comprising:
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an information holding section that holds data indicative of said reference azimuth; an azimuth designation signal generating section that generates an azimuth designation signal which designates said reference azimuth on the basis of said data indicative of said reference azimuth; a priority adding section that adds a signal indicative of priority to said azimuth designation signal; and a transmitting section that transmits said signal indicative of said priority and said azimuth designation signal having directivity in a direction designated by said azimuth designation signal generated by said azimuth designation signal generating section. - View Dependent Claims (23)
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Specification