Radio communication terminal and radio communication system
First Claim
1. A radio communication system, comprising:
- a master radio communication terminal including;
a first transmitting unit configured to transmit a beacon;
a second transmitting unit configured to transmit a first notifying signal which includes information of a frequency of the beacon and a transmission timing of the beacon;
a measuring unit configured to measure a reception power of a signal transmitted by each of a plurality of slave radio communication terminals;
a selecting unit configured to select a notifying radio communication terminal, which is to transmit a second notifying signal, from the slave radio communication terminals based on the reception power, the second notifying signal including the same information of the frequency of the beacon and the transmission timing of the beacon as the information included in the first notifying signal; and
a third transmitting unit configured to transmit, to the notifying radio communication terminal, notifying instruction information including an instruction to transmit the second notifying signal, andat least one slave radio communication terminal of the slave radio communication terminals including;
a first receiving unit configured to receive the notifying instruction information;
a fourth transmitting unit configured to transmit the second notifying signal to the other slave radio communication terminals when the slave radio communication terminal receives the notifying instruction information;
a second receiving unit configured to receive at least one of the first notifying signal and the second notifying signal; and
a third receiving unit configured to receive the beacon based on the information included in one of the received first notifying signal and the received second notifying signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio communication terminal includes a first transmitting unit configured to transmit a beacon, a second transmitting unit configured to transmit a first notifying signal which includes information of a frequency of the beacon and a transmission timing of the beacon, a measuring unit configured to measure a reception power of a signal transmitted by each of a plurality of slave radio communication terminals, a selecting unit configured to select a notifying radio communication terminal, which is to transmit a second notifying signal, from the slave radio communication terminals based on the reception power, the second notifying signal including the same information of the frequency of the beacon and the transmission timing of the beacon as the information included in the first notifying signal, and a third transmitting unit configured to transmit, to the notifying radio communication terminal, notifying instruction information including an instruction to transmit the second notifying signal.
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Citations
16 Claims
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1. A radio communication system, comprising:
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a master radio communication terminal including; a first transmitting unit configured to transmit a beacon; a second transmitting unit configured to transmit a first notifying signal which includes information of a frequency of the beacon and a transmission timing of the beacon; a measuring unit configured to measure a reception power of a signal transmitted by each of a plurality of slave radio communication terminals; a selecting unit configured to select a notifying radio communication terminal, which is to transmit a second notifying signal, from the slave radio communication terminals based on the reception power, the second notifying signal including the same information of the frequency of the beacon and the transmission timing of the beacon as the information included in the first notifying signal; and a third transmitting unit configured to transmit, to the notifying radio communication terminal, notifying instruction information including an instruction to transmit the second notifying signal, and at least one slave radio communication terminal of the slave radio communication terminals including; a first receiving unit configured to receive the notifying instruction information; a fourth transmitting unit configured to transmit the second notifying signal to the other slave radio communication terminals when the slave radio communication terminal receives the notifying instruction information; a second receiving unit configured to receive at least one of the first notifying signal and the second notifying signal; and a third receiving unit configured to receive the beacon based on the information included in one of the received first notifying signal and the received second notifying signal.
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2. A radio communication terminal, comprising:
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a first transmitting unit configured to transmit a beacon; a second transmitting unit configured to transmit a first notifying signal which includes information of a frequency of the beacon and a transmission timing of the beacon; a measuring unit configured to measure a reception power of a signal transmitted by each of a plurality of slave radio communication terminals; a selecting unit configured to select a notifying radio communication terminal, which is to transmit a second notifying signal, from the slave radio communication terminals based on the reception power, the second notifying signal including the same information of the frequency of the beacon and the transmission timing of the beacon as the information included in the first notifying signal; and a third transmitting unit configured to transmit, to the notifying radio communication terminal, notifying instruction information including an instruction to transmit the second notifying signal. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A radio communication terminal of a plurality of radio communication terminals communicating with a master radio communication terminal adapted to transmit a first notifying signal, comprising:
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a first receiving unit configured to receive, from the master radio communication terminal, notifying instruction information including an instruction to transmit a second notifying signal including the same information of a frequency of a beacon transmitted from the master radio communication terminal and a transmission timing of the beacon as information included in the first notifying signal transmitted from the master radio communication terminal; a transmitting unit configured to transmit the second notifying signal to other radio communication terminals when the radio communication terminal receives the notifying instruction information; a second receiving unit configured to receive at least one of the first notifying signal and the second notifying signal; and a third receiving unit configured to receive the beacon, based on the information included in one of the received first notifying signal and the received second notifying signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A receiver comprising:
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a converting unit configured to convert a receiving signal to a signal shifted by a preset frequency; a multiplying unit configured to multiply the receiving signal by the shifted signal; an extracting unit configured to extract a baseband signal from the multiplied signal; a detecting unit configured to detect a signal from the baseband signal.
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16. A radio communication method comprising:
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receiving, in a receiver, a notifying signal, transmitted by a transmitter, included in a first signal and a second signal, the first signal containing a first frequency band which is frequency-converted from a parameter signal including a parameter used to communicate with the receiver, the second signal containing a second frequency band which is frequency-converted from the parameter signal, the first frequency band and the second frequency band being distant from each other by a preset frequency; converting, in the receiver, the notifying signal to a signal shifted by the preset frequency; multiplying, in the receiver, the notifying signal by the shifted signal; extracting, in the receiver, a baseband signal from the multiplied signal; demodulating, in the receiver, the parameter from the baseband signal.
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Specification