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Radio environment measuring system
| Details |
Inventors: Tajima, Masami;
Assignee: Fujitsu Limited (Kawasaki, JP)
Primary Examiner: Gregory; Bernarr E.
Assistant Examiner:
Attorney, Agent or Firm: Armstrong, Westerman, Hattori, Mcleland & Naughton
A radio environment measuring system for measuring a propagation state of radio waves includes: a fixed radio apparatus provided in a base station; a mobile radio apparatus operatively connected to the fixed radio apparatus through the radio waves; the mobile radio apparatus having a repeater unit for receiving a transmission signal from the fixed radio apparatus and sending a returned signal to the fixed radio apparatus; and the fixed radio apparatus having a transmission/reception unit for sending the transmission signal to the mobile radio apparatus and receiving the returned signal from the mobile radio apparatus, and a measuring unit for measuring the propagation state of the radio waves, for example, a propagation distance, direction and reception intensity of the radio waves between the fixed radio apparatus and the mobile radio apparatus based on the transmission signal and the returned signal. |
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DETAILED DESCRIPTION The object of the present invention is to provide a radio environment measuring system enabling precise measurement of the propagation state of radio waves, for example, the propagation distance, direction and reception intensity of the radio waves.
In accordance with the present invention, there is provided a radio environment measuring system for measuring the propagation state of radio waves including: a fixed radio apparatus provided in a base station; a mobile radio apparatus operatively connected to the fixed radio apparatus through the radio waves; the mobile radio apparatus having a transmission/reception unit for receiving a transmission signal from the fixed radio apparatus and sending a return signal to the fixed radio apparatus; and the fixed radio apparatus having a transmission/reception unit for sending the transmission signal to the mobile radio apparatus and receiving the returned signal from the mobile radio apparatus, and a measuring unit for measuring the propagation state of the radio waves, for example, a propagation distance, direction and reception intensity of the radio waves between the fixed radio apparatus and the mobile radio apparatus based on the transmission signal and the returned signal.
In one preferred embodiment, the transmission/reception unit of the fixed radio apparatus includes a repeater unit for receiving the returned signal and again sending the returned signal to the mobile radio apparatus, and the transmission/reception unit of the mobile radio apparatus also includes a repeater unit for sending the returned signal to the fixed radio apparatus, and further, the transmission/reception of the transmission and returned signals are performed for predetermined times between the fixed radio apparatus and the mobile radio apparatus.
In another preferred embodiment, the measuring unit measures the propagation state of the radio waves based on the first transmission signal and the returned signal after transmission/reception for predetermined times
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