Radio transmission device and method, radio receiving device and method, radio transmitting/receiving system, and storage medium

• US 7,299,191 B2
• Filed: 03/21/2005
• Issued: 11/20/2007
• Est. Priority Date: 08/28/2000
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hamada, Osamu
• Primary Examiner(s): SMITH, CREIGHTON H
• Application Number:
  US11/085,442
• Publication Number:
  US 20050164632A1
• Time in Patent Office: 974 Days
• Field of Search: 455/466, 455/557, 455/559, 455/550.1, 455/556.1
• US Class Current: 704/503
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Disclosed herein is a radio transmission device comprising data inputting means for inputting transmission data, data storing means for storing the inputted transmission data temporarily, data compression means for reading data from the data storing means to compress the data, and data transmitting means for transmitting the compressed data through a radio line. With this configuration, a real-time signal in a radio transmission system, in which effective throughput is not guaranteed like ACL link of Bluetooth can be transmitted and received. Delay of data transmission caused by a change in throughput of the line is absorbed by the data storing means. In addition, controlling a compression rate in response to the change in throughput enables transmission with an optimum data rate.

Claims

1. A radio transmission device for transmitting data through a radio line, comprising:

data inputting means for inputting transmission data;

data compressing means for compressing the inputted transmission data;

compressed data storing means for storing the compressed data temporarily;

data transmitting means for reading the compressed data from the compressed data storing means to transmit the compressed data through the radio line; and

throughput judging means for judging a throughput in the radio line.

2. A radio transmission method for transmitting data through a radio line, comprising the steps of:

inputting transmission data;

compressing the inputted transmission data;

storing the compressed data temporarily;

transmitting the compressed data through the radio line; and

judging a throughput in the radio line.

3. A radio receiving device for receiving data through a radio line, comprising:

data receiving means for receiving compressed data through the radio line;

output data storing means for storing the received data temporarily by a first-in first-out method;

data decompressing means for reading data from the output data storing means by a first-in first-out method to decompress the data;

data outputting means for outputting the data decompressed by the data decompressing means; and

throughput judging means for judging a throughput in the radio line.

4. A radio receiving method for receiving data through a radio line, comprising the steps of:

receiving compressed data through the radio line;

storing the received data temporarily by means of a first-in first-out method;

reading the temporarily stored data by means of a first-in first-out method to decompress the data;

outputting the decompressed data; and

a throughput judging step for judging a throughput in the radio line.

5. A radio transmission device for transmitting data through a radio line, comprising:

an input device for inputting transmission data;

a compressor for compressing the inputted transmission data;

a storage for storing the compressed data temporarily;

a transmitter for reading the compressed data from the storage and transmitting the compressed data through the radio line; and

a judging device for judging a throughput in the radio line.

6. The radio transmission device of claim 5, wherein:

the storage comprises a memory that operates using a first-in first-out method; and

the judging device judges the throughput according to a difference between a data writing location and a data reading location of the storage.

7. The radio transmission device of claim 5, further comprising:

a compression rate controller for controlling a data compression rate in the compressor.

8. The radio transmission device of claim 5, further comprising:

a compression rate controller for controlling a data compression rate in the compressor according to the judged throughput.

9. The radio transmission device of claim 8, wherein:

the compression rate controller increases the data compression rate when the throughput decreases, and decreases the data compression rate when the throughput increases.

10. The radio transmission device of claim 5, further comprising:

an input speed controller for controlling a data input speed in the input device.

11. The radio transmission device of claim 5, further comprising:

an input speed controller for controlling a data input speed in the input device according to the judged throughput.

12. The radio transmission device of claim 11, wherein:

the input speed controller decreases the data input speed when the throughput decreases, and increases the data input speed when the throughput increases.

13. The radio transmission device of claim 11, wherein:

the transmitter performs best-effort-type packet transmission, which responds to a retransmission request.

14. A radio receiving device for receiving data through a radio line, comprising:

a receiver for receiving compressed data through the radio line;

a storage for storing the received data temporarily using a first-in first-out method;

a decompressor for reading data from the storage using a first-in first-out method to decompress the data;

an output device for outputting the data decompressed by the decompressor; and

a judging device for judging a throughput in the radio line.

15. The radio receiving device of claim 14, wherein:

the output device comprises a memory that operates using a first-in first-out method; and

the judging device judges the throughput according to a difference between a data writing location and a data reading location of the storage.

16. The radio receiving device of claim 14, wherein:

the receiver receives a compression rate parameter applied to transmission data; and

the decompressor performs data decompression processing according to the compression rate parameter.

17. The radio receiving device of claim 14, further comprising:

an output speed controller for controlling a data output speed in the output device.

18. The radio receiving device of claim 17, wherein:

the output device records data, which has been read from the storage, on a storage medium; and

the output speed controller controls a data recording speed for recording on the storage medium.

19. The radio receiving device of claim 14, further comprising:

an output speed controller for controlling a data output speed in the output device according to the judged throughput.

20. The radio receiving device of claim 19, wherein:

the output speed controller decreases the data output speed when the throughput decreases, and increases the data output speed when the throughput increases.

21. The radio receiving device of claim 14, wherein:

the receiver performs best-effort-type packet transmission that issues a retransmission request in response to an occurrence of a packet receiving error.