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US 6,633,753 B1Granted
Radio communication apparatus with power consumption reduced
AssigneeNEC Corporation
InventorToru Kido
Life of this patent
Estimating the term…
Abstract
A radio communication apparatus includes a receiving section, a power supply section and a control section. The receiving section receives a radio signal when electric power is supplied, and the radio signal has a preamble field for storing a preamble pattern. The power supply section supplies the electrical power to the receiving section and stopping the supply of the electrical power in response to a supply stop signal. The control section generates the supply stop signal when presence of the preamble pattern can not be detected from the radio signal received by the receiving section, in a state in which a frame synchronization is established.
Claims24
A radio communication apparatus comprising:
- an antenna for receiving a radio signal wherein said radio signal is composed of a preamble field for storing information for correction of a synchronization bit, a sync signal field for storing a sync signal, and a data field for storing data;
- a receiving and demodulating section which receives, demodulates and amplifies said radio signal when electric power is supplied;
- a power supply section which supplies said electrical power to said receiving and demodulating section through a switch, responding to a supply start signal and a supply stop signal, generated by a control section;
- a reference oscillating element for generating a reference oscillation clock signal;
- an Electrically Erasable Programmable Read-only Memory (EEPROM) for storing an intra-station ID;
- the control section which generates said supply stop signal when presence of said preamble pattern can not be detected from said radio signal received by said receiving and demodulating section, in a state in which a frame synchronization is established, extracts a message and an ID from a demodulated radio signal and compares the ID stored in the Electrically Erasable Programmable Read-only Memory (EEPROM) with transmitted ID to send a message to an inter-station, if the ID stored in the EEPROM and the transmitted ID are the same;
- a notifying section for notification of a message reception to a user of the said receiver;
- and
- a driver for driving said notifying section.
6 more elements
A radio communication apparatus comprising:
- an antenna for receiving a radio signal wherein said radio signal is composed of a preamble field for storing information for correction of a synchronization bit, a sync signal field for storing a sync signal, and a data field for storing a data;
- a receiving and demodulating section which receives, demodulates and amplifies said radio signal, when an electrical power is supplied in a state in which a frame synchronization is established, said radio signal having a preamble field for storing a preamble pattern;
- a power supply section which supplies said electrical power to said receiving and demodulating section through a switch in response to a supply start signal and stops the supply of said electrical power to said receiving and demodulating section in response to a supply stop signal;
- a reference oscillating element for generating a reference oscillation clock signal;
- an Electrically Erasable Programmable Read-only Memory (EEPROM) for storing an intra-station ID;
- and
- a control section which generates the supply start signal at a start timing of said preamble field and generates said supply stop signal when presence of said preamble pattern can not be detected from said radio signal received by said receiving and demodulating section, extracts a message and an ID from a demodulated radio signal and compares the ID stored in the Electrically Erasable Programmable Read-only Memory (EEPROM) with transmitted ID to send a message to an inter-station, if the ID stored in the EEPROM and the transmitted ID are the same;
- a notifying section for notification of a message reception to a user of the said receiver;
- a driver for driving said notifying section.
6 more elements
A radio communication apparatus comprising:
- an antenna for receiving a radio signal wherein said radio signal is composed of a preamble field for storing information for correction of a synchronization bit, a sync signal field for storing a sync signal, and a data field for storing a data;
- a receiving and demodulating section which receives, demodulates and amplifies said radio signal, when electrical power is supplied in a state in which a frame synchronization is established, wherein said radio signal having a preamble field for storing a preamble pattern;
- a power supply section which supplies said electrical power to said receiving and demodulating section through a switch, responding to a supply start signal and a supply stop signal, generated by a control section;
- a reference oscillating element for generating a reference oscillation clock signal;
- an Electrically Erasable Programmable Read-only Memory (EEPROM) for storing an intra-station ID;
- the control section which generates the supply start signal earlier than a start timing of said preamble field by a predetermined time and generates said supply stop signal when presence of said preamble pattern can not be detected from said radio signal received by said receiving and demodulating section and extracts a message and an ID from a demodulated radio signal and compares the ID stored in the Electrically Erasable Programmable Read-only Memory (EEPROM) with transmitted ID to send a message to an inter-station, if both the ID stored in the EEPROM and the transmitted ID are the same;
- a notifying section for notification a message reception to a user of the said receiver;
- and
- a driver for driving said notifying section.
6 more elements
An intermittently receiving method in a synchronization establishing state in a radio communication apparatus, comprising steps of:
- receiving a radio signal by a receiving and demodulating section when an electronic power is supplied to said receiving and demodulating section, said radio signal having a preamble field for storing a preamble pattern;
- supplying electrical power to said receiving and demodulating section through a switch, responding to a supply start signal and a supply stop signal, generated by a control section;
- stopping the supply of said electrical power to said receiving and demodulating section in response to said supply stop signal;
- and
- generating said supply stop signal when presence of said preamble pattern can not be detected from the radio signal received by said receiving and demodulating section, in a state in which a frame synchronization is established,
- extracting a message and an ID from a demodulated radio signal,
- comparing the ID stored in a Electrically Erasable Programmable Read-only Memory (EEPROM) with transmitted ID to send a message to an inter-station, if the ID stored in the EEPROM and the transmitted ID are the same,
- notifying a user of the said receiver about a message reception.
5 more elements
An intermittently receiving method in a complete synchronization establishing state in a radio communication apparatus comprising:
- an antenna for receiving a radio signal wherein said radio signal is composed of a preamble field for storing information for correction of a synchronization bit, a sync signal field for storing a sync signal, and a data field for storing data;
- a receiving and demodulating section which receives, demodulates and amplifies said radio signal when electric power is supplied;
- a power supply section which supplies said electrical power to said receiving and demodulating section through a switch, responding to a supply start signal and a supply stop signal, generated by a control section;
- a reference oscillating element for generating a reference oscillation clock signal:
- an Electrically Erasable Programmable Read-only Memory (EEPROM) for storing an intra-station ID;
- the control section which generates and said supply stop signal when presence of said preamble pattern can not be detected from said radio signal received by said receiving and demodulating section, in a state in which a frame synchronization is established, extracts a message and an ID from a demodulated radio signal and compares the ID stored in the Electrically Erasable Programmable Read-only Memory (EEPROM) with transmitted ID to send a message to an inter-station, if the ID stored in the EEPROM and the transmitted ID are the same;
- a notifying section for notification of a message reception to a user of the said receiver;
- a driver for driving said notifying section and comprising the steps of:
- receiving a radio signal by a receiving and demodulating section when an electrical power is supplied to said receiving and demodulation section, said radio signal having a preamble field for storing a preamble pattern;
- suppling electrical power to said receiving and demodulating section;
- generating a continuos synchronizing code;
- stopping the supply of said electrical power to said receiving and demodulating section in response to a supply stop signal;
- and
- generating said supply stop signal when presence of said preamble pattern can not be detected from the radio signal received by said receiving and demodulating section.
11 more elements
Dependencies are inferred from the claim text.