Radio communication device, radio communication method, and radio communication program

A base station radio communication device belonging to a second radio communication system which shares a frequency channel and communicates with a first radio communication system and in which a radio terminal station communicates with a radio base station using a predetermined frequency channel within a predetermined transmission time period, the base station radio communication device comprising:

• an announcement information receiver receiving announcement information from the radio base station;
• a reception power meter measuring reception power of the announcement information;
• and
• a reception sensitivity information memory which stores information concerning reception sensitivity of the radio base station.

A base station radio communication device comprising:

• a reconfigurable processor which can change processing operations in accordance with a type of a first radio communication system;
• a processing memory storing information concerning the processing operations;
• and
• a traffic meter observing traffic of a second radio communication system,
• wherein when the traffic in the second radio communication system is above a predetermined threshold, the information concerning the processing operation and stored in the reconfigurable memory is changed over to the information stored in the processing memory, and information concerning the change of the processing operation is incorporated into the announcement information, and is transmitted.

A terminal station radio communication device belonging to a second radio communication system which shares the same frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station using a predetermined frequency channel within a predetermined transmission time period, the terminal station radio communication device comprising:

• an announcement information receiver receiving announcement information from the radio base station;
• a reception power meter measuring power for receiving the announcement information;
• and
• a reception sensitivity memory storing information concerning reception sensitivity of the radio base station.

A terminal station radio communication device belonging to a second radio communication system which shares the same frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station using a predetermined frequency channel within a predetermined transmission time period, the terminal station radio communication device comprising:

• an announcement information receiver receiving announcement information from the radio base station;
• a reception power meter measuring power for receiving the announcement information;
• and
• an reception sensitivity memory storing information concerning reception sensitivity of the radio base station.

A radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station using a predetermined frequency channel within a predetermined transmission time period, the radio communication device comprising:

• a first signal transmitter-receiver unit transmitting and receiving signals for the first radio communication system;
• a transmission power determining unit determining transmission power in order that signal power is equal to or smaller than a carrier sense level during an inter-frame space of the first radio communication system at the radio terminal stations and the radio base station belonging to the first radio communication system;
• an inter-frame space determining unit determining an inter-frame space on the basis of an output of the first signal transmitter-receiver unit;
• and
• a second signal transmitter-receiver unit sending a signal of the second communication system during the inter-frame of the first radio communication system.

A radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station using a predetermined frequency channel within a predetermined transmission time period, the radio communication device comprising:

• a first signal transmitter-receiver unit transmitting and receiving signals for the first radio communication system;
• a memory storing information concerning allowable interference levels of radio terminal stations and radio base station belonging to the first radio communication system;
• a control unit determining a signal transmission period on the basis of header information included in a packet received from the radio terminal station and base station belonging to the first radio communication system;
• a transmission power determining unit determining transmission power in order that signal power at the radio terminal station and radio base station is equal to or smaller than an allowable interference level of the first radio communication system at the radio terminal station and the radio base station;
• and
• a second signal transmitter-receiver unit sending a signal of the second radio communication system in a transmission time period determined by the control unit and using transmission power determined by the transmission power determining unit.

A radio communication method carried out by a radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication method comprising:

• setting up signal transmission power which is used for communications between radio communication devices belonging to the second radio communication system, the transmission power being determined such that reception power at the radio base station is below a predetermined threshold;
• acquiring timing information for radio terminal station to start signal transmission;
• and
• starting the signal transmission at the timing included in the timing information and using the signal transmission power, and completing the signal transmission within a predetermined time period.

A radio communication method carried out by a radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication method comprising:

• letting the radio communication device transmit and receive announcement information from the radio base station;
• measure reception power of the announcement information;
• and
• store information concerning reception sensitivity of the radio base station.

A radio communication method carried out by a radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication method comprising:

• letting the radio communication device receive announcement information from the radio base station;
• measure reception power of the announcement information;
• store information concerning reception sensitivity of the radio base station;
• perform reconfigurable processing for changing contents of processes or internal configuration depending upon a type of the first communication system;
• store information concerning contents of processes;
• and
• observe traffic in the second radio communication system,
• wherein the contents of processes and internal configuration of the reconfigurable processing are changed in accordance with system type changing information of the first radio communication system included the announcement information sent by another radio communication device belonging to the second radio communication system.

A radio communication method carried out by a terminal station radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication method comprising:

• letting the radio communication device transmit and receive signals for the first radio communication system;
• determine transmission power such that signal power at the radio terminal stations and radio base stations belonging to the first radio communication system is equal to or less than a carrier sense level in an inter-frame space of the first radio communication system;
• determine the inter-frame space of the first radio communication system on the basis of the signal power;
• and
• send a signal for the second radio communication system in the inter-frame space.

A radio communication method carried out by a terminal station radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication method comprising:

• letting the radio communication device transmit and receive signals for the first radio communication system;
• store allowable interference levels of the radio terminal stations and radio base station belonging to the first radio communication system;
• determine a signal transmission period on the basis of header information listed in a packet which is transmitted by the radio terminal station and radio base station;
• determine transmission power in order that signal power at the radio terminal stations and radio base station belonging to the first radio communication system is equal to less than an allowable interference level of the first radio communication system;
• and
• transmit a signal for the second radio communication system in the signal transmission period and using the transmission power.

A radio communication method carried out by a terminal station radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication method comprising:

• letting the radio communication device set up signal transmission-reception power in order that reception power which enables communications between radio communication devices of the second radio communication system and is at the radio base station is equal to or less than a predetermined threshold;
• acquire information concerning timing to transmit a signal from the radio terminal station;
• and
• start transmitting the signal at the timing in the timing information and using the signal transmission power, and terminate transmitting the signal within a predetermined time period.

A radio communication program used by a terminal station radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication program comprising:

• letting the radio communication device receive announcement information from the radio base station;
• measure reception power of the announcement information;
• and
• store information concerning reception sensitivity of the radio base station.

A radio communication program used by a terminal station radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication program comprising:

• letting the radio communication device receive announcement information from the radio base station;
• measure reception power of the announcement information;
• store information concerning reception sensitivity of the radio base station;
• perform reconfigurable processing for changing contents of processes or internal configuration depending upon a type of the first communication system;
• store information concerning contents of processes;
• and
• observe traffic in the second radio communication system,
• wherein the contents of processes and internal configuration of the reconfigurable processing are changed in accordance with type changing information of the first radio communication system included the announcement information sent by another radio communication device belonging to the second radio communication system.

A radio communication program used by a terminal station radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication program comprising:

• letting the radio communication device transmit and receive signals for the first radio communication system;
• determine transmission power such that signal power at the radio terminal stations and radio base stations belonging to the first radio communication system is equal to or less than a carrier sense level in an inter-frame space of the first radio communication system;
• determine the inter-frame space of the first radio communication system on the basis of the signal power;
• and
• send a signal for the second radio communication system the inter-frame space.

A radio communication program used by a terminal station radio communication device belonging to a second radio communication system which shares a frequency channel with a first radio communication system and in which a radio terminal station communicates with a radio base station in a predetermined time period using a predetermined frequency channel, the radio communication program comprising:

• letting the radio communication device transmit and receive signals for the first radio communication system;
• store allowable interference levels of the radio terminal stations and radio base stations belonging to the first radio communication system;
• determine a signal transmission period on the basis of header information listed in a packet which is transmitted by the radio terminal station and radio base station;
• determine transmission power in order that signal power at the radio terminal stations and radio base stations belonging to the first radio communication system is equal to less than an allowable interference level of the first radio communication system;
• and
• transmit a signal for the second radio communication system in the signal transmission period and using the transmission power.