Radio communication device, program and radio communication method

• US 8,452,239 B2
• Filed: 11/14/2008
• Issued: 05/28/2013
• 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.), Sony Corporation (Sony Group Corp.)
• Inventors: Kohno, Michinari, Yamane, Kenji
• Primary Examiner(s): Yun, Eugene
• Application Number:
  US12/740,689
• Publication Number:
  US 20100240320A1
• Time in Patent Office: 1,656 Days
• Field of Search: 455/72, 455/67.13, 455/63.1, 455/67.11, 455/570, 455/114.2, 455/115.1, 455/278.1, 455/283, 455/296
• US Class Current: 455/72
• CPC Class Codes: G01S 11/06 using intensity measurements
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• 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 2001/0093 Point-to-multipoint
• 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 operating in an autonomous distributed manner which includes a compression unit that compresses streaming data, a control unit that controls a compression rate of streaming data of the compression unit according to a distance from other radio communication device, a transmission unit that transmits the streaming data compressed by the compression unit to the other radio communication device.

Claims

1. A radio communication device comprising:

a compression unit that compresses data;

a control unit that controls a compression rate of the data according to a distance between the radio communication device and another radio communication device;

a transmission unit that transmits compressed data compressed by the compression unit to the other radio communication device without relying on a radio base station;

a determination unit that determines whether a radio signal transmitted from the other radio communication device and received by a reception unit satisfies a predetermined condition regarding a noise component; and

an estimation unit that estimates the distance between the radio communication device and the other radio communication device based on a field intensity of the radio signal, which is determined to satisfy the predetermined condition regarding the noise component.

2. The radio communication device according to claim 1,

wherein the control unit increases the compression rate as the distance is estimated to be more distant by the estimation unit.

3. The radio communication device according to claim 2,

wherein the determination unit determines that the predetermined condition regarding the noise component is satisfied when the noise component of the radio signal is greater than a lower limit set value and lower than an upper limit set value.

4. The radio communication device according to claim 2,

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 the distance using the device information.

5. The radio communication device according to claim 2, wherein the estimation unit

calculates an average value of field intensities of the radio signals which are determined to satisfy the predetermined condition by the determination unit,

determines in which of defined average value ranges the average value is included, and

estimates that the distance is a distance corresponding to the average value range in which the average value is included.

6. The radio communication device according to claim 1,

wherein the control unit controls the compression rate so that the data is to be compressed at a rate corresponding to the distance estimated by the estimation unit.

7. The radio communication device according to claim 1, wherein the transmission unit transmits the compressed data by streaming.

8. The radio communication device according to claim 7, wherein the transmission unit transmits the compressed data to other radio communication devices.

9. A non-transitory, computer-readable storage medium storing a program, which, when executed by a radio communication device, causes the radio communication device to perform a method comprising the steps of:

controlling a compression rate of data according to a distance between the radio communication device and another radio communication device;

compressing the data at the compression rate;

determining whether a radio signal transmitted from the other radio communication device satisfies a predetermined condition regarding a noise component; and

estimating the distance between the radio communication device and the other radio communication device based on a field intensity of the radio signal, which is determined to satisfy the predetermined condition regarding the noise component.

10. A method of operating a radio communication device comprising the steps of:

controlling a compression rate of data according to a distance between the radio communication device and another radio communication device;

compressing the data at the compression rate;

transmitting the compressed data to the other radio communication device without relying on a radio base station;

determining whether a radio signal transmitted from the other radio communication device satisfies a predetermined condition regarding a noise component; and

estimating the distance between the radio communication device and the other radio communication device based on a field intensity of the radio signal, which is determined to satisfy the predetermined condition regarding the noise component.