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

A radio communication device comprising:

• a control unit that controls to prepare for data loss during radio communication of transmission data;
• a reception unit that receives data transmitted by radio;
• a transmission unit that transmits the transmission data by radio to another radio communication device according to the control of the control unit,
• wherein one of the radio communication device and the other radio communication device estimates a distance from the other based on a field intensity of a radio signal which is judged to satisfy a certain requirement regarding noise component among radio signals received from the other of the radio communication device and the other radio communication device, and wherein the other of the radio communication device and the other radio communication device transmits a retransmission request for requesting retransmission of data, which is not correctly received by the reception unit, according to the control of the control unit,
• wherein the control unit performs a control of a content according to the estimated distance, and
• wherein the control unit controls the number of the retransmission requests to be transmitted by the transmission unit according to the estimated distance.

A radio communication system comprising:

• a first radio communication device comprising:
• a control unit that controls to prepare for data loss during radio communication of transmission data with a second radio communication device;
• and
• a transmission unit that transmits the transmission data by radio to the second radio communication device according to the control of the control unit,
• wherein one of the first radio communication device and the second radio communication device comprises:
• a reception unit configured to receive a radio signal from the second ratio communication device;
• a measurement unit configured to measure a field intensity and an associated noise component from the received radio signal;
• a judgment unit configured to judge whether the noise component satisfies a predetermined condition;
• and
• an estimation unit configured to estimate a distance between the first radio communication device and the second radio communication device based on the field intensity whose corresponding noise component satisfies the predetermined condition,
• wherein the first radio communication device is configured to receive one or more requests for retransmission of the transmission data from the second radio communication device, wherein the number of the one or more requests for retransmission depends on the estimated distance, and
• wherein the control unit performs a control of a content according to the estimated distance.

A radio communication method comprising:

• receiving a radio signal from a transmission source device;
• measuring a field intensity and an associated noise component of the received radio signal;
• judging whether the noise component associated with the field intensity satisfies a certain requirement;
• estimating a distance from the transmission source device based on the field intensity whose corresponding noise component is judged to satisfy the certain requirement;
• controlling to prepare for data loss during transmission of transmission data to the transmission source device by using a content according to the estimated distance;
• transmitting the transmission data by radio to the transmission source device according to the control;
• and
• receiving one or more requests for retransmission of the transmission data from the transmission source device, wherein the number of the one or more requests for retransmission depends on the estimated distance.

A non-transitory, computer-readable medium for use on a computer for a radio communication device, the computer-readable medium including computer-executable instructions for performing a method for controlling to prepare for data loss during radio communication of transmission data using a content, the method comprising:

• receiving a radio signal from a transmission source device;
• measuring a field intensity and an associated noise component of the received radio signal;
• judging whether the noise component associated with the field intensity satisfies a certain requirement;
• estimating a distance from the transmission source device based on the field intensity whose corresponding noise component is judged to satisfy the certain requirement;
• controlling to prepare for data loss during transmission of transmission data to the transmission source device by using a content according to the estimated distance;
• transmitting the transmission data by radio to the transmission source device according to the control;
• and
• receiving one or more requests for retransmission of the transmission data from the transmission source device, wherein the number of the one or more requests for retransmission depends on the estimated distance.