Data communication speed control system, transmitter apparatus and receiver apparatus

• US 20020191722A1
• Filed: 06/11/2002
• Published: 12/19/2002
• Est. Priority Date: 10/13/2000
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Naruse, Tetsuya
• Granted Patent: US 7,369,497 B2
• Time in Patent Office: Days
• US Class Current: 375/358
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• 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 1/0018 based on latency requirement
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0032 Without explicit signalling
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 5/1453 of modulation type
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/24 Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]

Abstract

This invention aims to make it possible to realize data communication having excellent communication throughput and good quality even if the communication state fluctuates. According to the present invention, by sequentially adjusting the transmission speed of data that is to be sent to the portable radio terminal 22 on the basis of momentary real transmission speed in the communication channel 6 that has been fed back from the portable radio terminal 22, and hereby controlling the data communication speed between itself and the portable radio terminal 22, it is able to execute data transmission processing that is corresponding to changes of transmission speed in the communication channel 6, in this way, it is able to realize data communication having excellent communication throughput and good quality even if the communication state fluctuates.

Claims

1. A data communication speed control system for controlling data communication speed between a transmitting apparatus, which transmits a data, and a receiving apparatus, which receives said data from the transmitting apparatus via the stated communication channel, said system comprises:

said receiving apparatus that sequentially detects momentary real transmission speed in said communication channel, on the basis of the received data that has been delivered from said transmitting apparatus, and sequentially notifies the real transmission speed to said transmitting apparatus; and

said transmitting apparatus that sequentially adjusts the transmission speed of said data that is to be sent to said receiving apparatus, on the basis of said real transmission speed, and controls said data communication speed between itself and said receiving apparatus.

2. The data communication speed control system according to claim 1, wherein

said transmitting apparatus calculates predicted transmission speed on the basis of mean value of said real transmission speed that has been sequentially notified from said receiving apparatus, and controls the compression rate relevant to said data on the basis of the predicted transmission speed.

3. A transmitting apparatus which comprises:

receiving means for sequentially receiving notifications of momentary real transmission speed in the stated communication channel that has been sequentially detected on the basis of received data that has been received via said communication channel, from a receiving apparatus; and

transmission control means for sequentially adjusting the transmission speed of data that is to be sent to said receiving apparatus, on the basis of said real transmission speed, and hereby controlling said data communication speed between itself and said receiving apparatus.

4. The transmitting apparatus according to claim 3 which further comprises:

compression rate controlling means for calculating predicted transmission speed on the basis of mean value of said real transmission speed that has been sent from said receiving apparatus, and controlling the compression rate relevant to said data on the basis of the predicted transmission speed.

5. A receiving apparatus which comprises:

real transmission speed notifying means for sequentially detecting momentary real transmission speed in the stated communication channel on the basis of the received data that has been received via said communication channel, and sequentially notifying it to a transmitting apparatus; and

receiving means for receiving data whose communication speed in said communication channel has been controlled by the fact that the transmission speed has been sequentially adjusted by said transmitting apparatus on the basis of said real transmission speed.

6. The receiving apparatus according to claim 5, wherein

said receiving means receives data that has been subjected to compression coding, by said transmitting apparatus, with the compression rate that has been controlled on the basis of predicted transmission speed that has been calculated on the basis of the mean value of said real transmission speed.

7. A data communication speed control system for controlling data communication speed between a transmitting apparatus, which transmits a data, and a receiving apparatus, which receives said data from the transmitting apparatus via the stated communication channel, said system comprises:

said receiving apparatus that sequentially detects momentary real transmission speed in said communication channel, on the basis of the received data that has been delivered from said transmitting apparatus, and sequentially notifies the real transmission speed to said transmitting apparatus; and

said transmitting apparatus that sequentially adjusts the compression rate of said data that is to be sent to said receiving apparatus, on the basis of said real transmission speed.

8. A transmitting apparatus which comprises:

receiving means for sequentially receiving notifications of momentary real transmission speed in said communication channel that has been sequentially detected on the basis of received data that has been received via the stated communication channel, from a receiving apparatus; and

transmission control means for sequentially adjusting the compression rate of data that is to be sent to said receiving apparatus, on the basis of said real transmission speed, and for transmitting the data.

9. A receiving apparatus which comprises:

real transmission speed notifying means for sequentially detecting momentary real transmission speed in the stated communication channel on the basis of the received data that has been received via said communication channel, and sequentially notifying it to a transmitting apparatus; and

receiving means for receiving data whose compression rate has been sequentially adjusted by said transmitting apparatus on the basis of said real transmission speed.