Radio Communication Device, Radio Communication System, Program and Radio Communication Method

• US 20100257421A1
• Filed: 10/02/2008
• Published: 10/07/2010
• Est. Priority Date: 11/15/2007
• Status: Active Grant

• Current Assignee: Sony Interactive Entertainment Inc. (Sony Group Corp.)
• Original Assignee: Sony Computer Entertainment Incorporated (Sony Group Corp.)
• Inventors: Yamane, Kenji, Kohno, Michinari
• Granted Patent: US 8,479,059 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: G01S 11/06 using intensity measurements
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/206 for modulated signals
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds

Abstract

Provided is a radio communication device for performing radio communication with another radio communication device includes a control unit that controls to prepare for data loss during radio communication of transmission data and a transmission unit that transmits the transmission data by radio according to the control of the control unit. 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 received radio signals received from the other of the radio communication device and the other radio communication device. The control unit performs a control of a content according to the distance estimation result.

Claims

1. A radio communication device comprising:

a control unit that controls to prepare for data loss during radio communication of transmission data; and

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 own 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 own device and the other radio communication device, and

the control unit performs a control of a content according to the distance estimation result.

2. The radio communication device according to claim 1, further comprising:

a data processing unit that adds error correction data to the transmission data,

wherein the control unit controls a data amount of the error correction data, with respect to the transmission data, which is to be added by the data processing unit according to the distance estimation result.

3. The radio communication device according to claim 2, wherein

the control unit increases the data amount of the error correction data with respect to the transmission data as a longer distance is estimated.

4. The radio communication device according to claim 1, further comprising:

a reception unit that receives data transmitted by radio,

wherein the transmission unit 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,

the control unit controls the number of the retransmission requests to be transmitted by the transmission unit according to the distance estimation result.

5. The radio communication device according to claim 4, wherein

the control unit increases the number of the retransmission requests as a longer distance is estimated.

6. The radio communication device according to claim 1, further comprising

a reception unit that receives a radio signal transmitted from the other radio communication device;

a measurement unit that measures a field intensity of the radio signal received by the reception unit;

a judgment unit that judges whether the radio signal received by the reception unit satisfies the certain requirement regarding noise component; and

an estimation unit that estimates a distance from the other radio communication device based on a field intensity of a radio signal, which is judged to satisfy the certain requirement regarding noise component by the judgment unit,

wherein the judgment unit judges that the noise component of the radio signal satisfies the certain requirement regarding noise component when the noise component is greater than a lower limit set value and lower than an upper limit set value.

7. The radio communication device according to claim 6,

wherein the reception unit receives device information, from the other radio communication device in advance, which indicates a transmitting power of the radio signal of the other radio communication device, and

the estimation unit estimates a distance from the other radio communication device using the device information.

8. The radio communication device according to claim 7,

wherein the estimation unit

calculates an average value of field intensities of the radio signals which are judged to satisfy the certain requirement by the judgment unit,

judges whether the average value is included in any one of classified average value ranges, and

estimates that the distance from the other radio communication device is a distance corresponding to the average value range to which the average value is included.

9. A radio communication system comprising

a first radio communication device that includes:

a control unit that controls to prepare for data loss during radio communication of transmission data; and

a transmission unit that transmits the transmission data by radio to a 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 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 first radio communication device and the second radio communication device, and

the control unit performs a control of a content according to the distance estimation result.

10. A program for causing a computer to function as a control unit for controlling to prepare for data loss during radio communication of transmission data using a content according to a distance estimation result,

wherein the computer is provided to a radio communication device including a transmission unit that transmits transmission data by radio and performing radio communication with another radio communication device, and

one of the radio communication device and the another 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 another radio communication device.

11. A radio communication method comprising the steps of:

receiving a radio signal;

measuring a field intensity of the received radio signal;

judging whether the received radio signal satisfies a certain requirement regarding noise component;

estimating a distance from a transmission source device of the radio signal based on a field intensity of the radio signal, which is judged to satisfy the certain requirement regarding noise component;

controlling to prepare for data loss during radio communication of transmission data by using a content according to the distance estimation result; and

transmitting the transmission data by radio according to the control.