Radio transmitting/receiving apparatus and intermittent transmission/reception control method of radio transmitting/receiving apparatus
First Claim
1. A radio transmitter/receiver which requires less reception standby power, comprising:
- a radio reception unit;
a radio transmission unit for transmitting an activation selection signal using ASK modulation or OOK modulation to switch the radio reception unit of another radio transmitter/receiver from intermittent reception mode to continuous reception mode before transmitting a preamble signal thereto; and
a standby reception unit for intermittently performing reception at intervals of a prescribed bit width to receive an activation selection signal from the radio transmission unit of another radio transmitter/receiver, and generating a signal to activate the radio reception unit on receipt of the activation selection signal.
1 Assignment
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Accused Products
Abstract
A radio transmitter/receiver and an intermittent transmission/reception control method thereof, capable of reducing the reception startup time as well as suppressing reception power consumption. A radio transmitter/receiver used for ad hoc communication is provided with a dedicated standby reception unit (10) having a simple combination of an RF demodulator (6) and a SAW oscillator (7) only to detect a carrier. For a time period of several bits, the activation system of the radio transmitter/receiver intermittently receives activation selection signals transmitted using ASK (or OOK) modulation prior to a preamble signal, and makes an activation selection based on the pattern of presence and absence of the carriers of the signals. As a result, the reception startup time can be shortened, and less reception power is required.
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Citations
24 Claims
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1. A radio transmitter/receiver which requires less reception standby power, comprising:
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a radio reception unit;
a radio transmission unit for transmitting an activation selection signal using ASK modulation or OOK modulation to switch the radio reception unit of another radio transmitter/receiver from intermittent reception mode to continuous reception mode before transmitting a preamble signal thereto; and
a standby reception unit for intermittently performing reception at intervals of a prescribed bit width to receive an activation selection signal from the radio transmission unit of another radio transmitter/receiver, and generating a signal to activate the radio reception unit on receipt of the activation selection signal. - View Dependent Claims (2, 3, 4, 5)
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- 6. A radio transmitter, including a radio transmission unit for transmitting an activation selection signal using ASK modulation or OOK modulation to switch the radio reception unit of a radio receiver from intermittent reception mode to continuous reception mode before transmitting a preamble signal thereto.
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8. A radio receiver which requires less reception standby power, comprising:
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a radio reception unit; and
a standby reception unit for intermittently performing reception at intervals of a prescribed bit width to receive an activation selection signal transmitted using ASK modulation or OOK modulation prior to a preamble signal, and generating a signal to activate the radio reception unit on receipt of the activation selection signal. - View Dependent Claims (9, 10, 11, 12)
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13. An intermittent transmission/reception control method applied to a radio transmitter/receiver comprising a radio reception unit, a radio transmission unit and a standby reception unit for reducing reception standby power, the method comprising the steps of:
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the radio transmission unit transmitting an activation selection signal using ASK modulation or OOK modulation to switch the radio reception unit of another radio transmitter/receiver from intermittent reception mode to continuous reception mode before transmitting a preamble signal thereto;
the standby reception unit intermittently performing reception at intervals of a prescribed bit width to receive an activation selection signal from the radio transmission unit of another radio transmitter/receiver; and
the standby reception unit generating a signal to activate the radio reception unit on receipt of the activation selection signal. - View Dependent Claims (14, 15, 16, 17)
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- 18. An intermittent transmission control method, comprising the step of the radio transmission unit of a radio transmitter transmitting an activation selection signal using ASK modulation or OOK modulation to switch the radio reception unit of a radio receiver from intermittent reception mode to continuous reception mode before transmitting a preamble signal thereto.
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20. An intermittent reception control method for reducing reception standby power, comprising the steps of:
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the standby reception unit of a radio receiver intermittently performing reception at intervals of a prescribed bit width to receive an activation selection signal transmitted using ASK modulation or OOK modulation prior to a preamble signal; and
the standby reception unit generating a signal to activate the radio reception unit of the radio receiver on receipt of the activation selection signal. - View Dependent Claims (21, 22, 23, 24)
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Specification