Information processing unit, information processing method, client device and information processing system

• US 8,874,756 B2
• Filed: 03/18/2009
• Issued: 10/28/2014
• Est. Priority Date: 03/19/2008
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kikkawa, Norifumi, Yamashita, Kei, Miyama, Seiji, Honda, Yasuaki
• Primary Examiner(s): Ashraf, Waseem
• Application Number:
  US12/406,646
• Publication Number:
  US 20090240766A1
• Time in Patent Office: 2,050 Days
• Field of Search: 709/227, 709232-233
• US Class Current: 709/227
• CPC Class Codes: H04L 47/27 Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]

Abstract

An information processing unit includes an application data receiving buffer to temporarily store data transmitted from a client device for initiating a connection, an application data receiving section to acquire the data transmitted from the client device from the application data receiving buffer and transmit the data to an upper layer application, and a flow control reception management section to transfer the data transmitted from the client device to the application data receiving buffer and monitor a free space in the application data receiving buffer and supply a data size receivable by the application data receiving buffer to the client device.

Claims

1. An information processing unit comprising:

a connection wait section to establish a connection with a client device for initiating a connection;

a Transfer Control Protocol (TCP) receiving buffer to store first data received from the client device; and

a data receiving section to receive the first data from the TCP receiving buffer, the data receiving section comprising;

an application data receiving buffer to receive the first data stored in the TCP receiving buffer;

an application data receiving section to acquire the first data from the application data receiving buffer and transmit the first data to an upper layer application; and

a flow control reception management section to monitor a free space in the application data receiving buffer and supply a data size receivable by the application data receiving buffer to the client device, wherein the data size receivable is used by the client device to determine a size of first data to be subsequently transmitted to the information processing unit.

2. The information processing unit according to claim 1, wherein

the flow control reception management section supplies the data size receivable by the application data receiving buffer to the client device upon establishment of the connection with the client device.

3. The information processing unit according to claim 1, wherein

the flow control reception management section supplies an increment in the free space in the application data receiving buffer to the client device upon increase in the free space in the application data receiving buffer.

4. The information processing unit according to claim 1, further comprising:

a communication section to control communication with the client device, wherein the TCP receiving buffer temporarily stores the first data received from the client device by the communication section,

wherein the flow control reception management section transfers the first data temporarily stored in the TCP receiving buffer to the application data receiving buffer.

5. The information processing unit according to claim 1, further comprising:

a connection maintenance control information receiving section to receive connection maintenance control information transmitted from the client device,

wherein the connection maintenance control information receiving section discards the received connection maintenance control information upon reception of the connection maintenance control information in the TCP receiving buffer.

6. The information processing unit according to claim 1, further comprising:

a data transmitting section to transmit second data to the client device, the data transmitting section comprising;

an application data transmitting buffer to store the second data to be transmitted to the client device;

an application data transmitting section to acquire the second data to be transmitted to the client device from the upper layer application and transfer the second data to the application data transmitting buffer; and

a flow control transmission management section to acquire the second data from the application data transmitting buffer and transmit the second data to the client device based on a data size receivable by the client device, supplied from the client device.

7. The information processing unit according to claim 6, further comprising

a communication section to control communication with the client device;

and

a communication section transmitting buffer to store the second data to be transmitted to the client device by the communication section,

wherein the flow control transmission management section transfers the second data stored in the application data transmitting buffer to the communication section transmitting buffer.

8. An information processing method performed by an information processing unit, the information processing method comprising:

establishing a connection with a client device;

supplying a data size receivable by an application data receiving buffer to the client device based on a free space in the application data receiving buffer to store first data transmitted from the client device, wherein the data size receivable is used by the client device to determine a size of the first data to be subsequently transmitted to the information processing unit;

storing the first data transmitted from the client device into a Transfer Control Protocol (TCP) receiving buffer;

transferring the first data stored in the TCP receiving buffer to the application data receiving buffer; and

transmitting the data temporarily stored in the application data receiving buffer to an upper layer application.

9. The information processing method according to claim 8, further comprising:

acquiring second data to be transmitted to the client device from the upper layer application and transferring the second data to an application data transmitting buffer to store the second data to be transmitted to the client device; and

acquiring the second data from the application data transmitting buffer and transmitting the second data to the client device based on a data size receivable by the client device, supplied from the client device.

10. A client device comprising:

a connection establishment section to initiate and establish a connection with an information processing unit; and

a data transmitting section to transmit first data to the information processing unit, the data transmitting section comprising;

an application data transmitting buffer to store the first data to be transmitted to the information processing unit;

an application data transmitting section to acquire the first data from an upper layer application and transfer the first data to the application data transmitting buffer; and

a flow control transmission management section to acquire the first data from the application data transmitting buffer and transmit the first data to the information processing unit based on a data size receivable by an application data receiving buffer of the information processing unit, previously supplied from the information processing unit, wherein the first data transmitted by the client device is transferred to the application data receiving buffer from a Transfer Control Protocol (TCP) receiving buffer of the information processing unit, wherein the TCP receiving buffer stores the first data received from the client device.

11. The client device according to claim 10, further comprising:

a data receiving section to receive second data transmitted from the information processing unit, the data receiving section comprising;

an application data receiving buffer to store the second data transmitted from the information processing unit;

an application data receiving section to acquire the second data from the application data receiving buffer and transmit the second data to the upper layer application; and

a flow control reception management section to monitor a free space in the application data receiving buffer of the client device and supply a data size receivable by the application data receiving buffer of the client device to the information processing unit, and transfer the second data transmitted from the information processing unit to the application data receiving buffer of the client device.

12. An information processing method performed by a client device, the information processing method comprising:

initiating and establishing a connection with an information processing unit;

acquiring first data to be transmitted to the information processing unit from an upper layer application and transferring the first data to an application data transmitting buffer to store the first data to be transmitted to the information processing unit; and

acquiring the first data from the application data transmitting buffer and transmitting the first data to the information processing unit based on a data size receivable by an application data receiving buffer of the information processing unit, previously supplied from the information processing unit, wherein the first data transmitted by the client device is transferred to the application data receiving buffer from a Transfer Control Protocol (TCP) receiving buffer of the information processing unit, wherein the TCP receiving buffer stores the first data received from the client device.

13. The information processing method according to claim 12, further comprising:

supplying a data size receivable by an application data receiving buffer of the client device to the information processing unit based on a free space in the application data receiving buffer of the client device to store second data transmitted from the client device; and

storing the second data transmitted from the information processing unit into the application data receiving buffer of the client device; and

transmitting the second data stored in the application data receiving buffer of the client device to the upper layer application.

14. An information processing system comprising:

a client device, comprising;

a connection establishment section to initiate and establish a connection with an information processing unit; and

a data transmitting section to transmit first data to the information processing unit, the data transmitting section comprising;

an application data transmitting buffer to store the first data to be transmitted to the information processing unit;

an application data transmitting section to acquire the first data to be transmitted to the information processing unit from an upper layer application of the client device and transfer the first data to the application data transmitting buffer; and

a flow control transmission management section to acquire the first data from the application data transmitting buffer and transmit the first data to the information processing unit based on a data size receivable by an application data receiving buffer of the information processing unit, previously supplied from the information processing unit; and

the information processing unit, comprising;

a connection wait section to establish the connection with the client device;

a Transfer Control Protocol (TCP) receiving buffer to store the first data received from the client device; and

a data receiving section to receive the first data from the TCP receiving buffer, the data receiving section comprising;

an application data receiving buffer to receive the first data stored in the TCP receiving buffer,

an application data receiving section to acquire the first data from the application data receiving buffer and transmit the first data to an upper layer application of the information processing unit; and

a flow control reception management section to monitor a free space in the application data receiving buffer and supply a data size receivable by the application data receiving buffer to the client device, wherein the data size receivable is used by the client device to determine a size of the first data to be subsequently transmitted to the information processing unit.

15. The information processing system according to claim 14, wherein

the data transmitting section of the client device further comprises:

a connection maintenance control information transmitting section to transmit connection maintenance control information for maintaining a connection established with the information processing unit; and

the connection maintenance control information transmitting section transmits the connection maintenance control information to the information processing unit when communication is not performed with the information processing unit for a given period of time.

16. The information processing system according to claim 14, wherein

the information processing unit further comprises:

a data transmitting section to transmit second data to the client device, the data transmitting section comprising;

an application data transmitting buffer to store the second data to be transmitted to the client device;

an application data transmitting section to acquire the second data to be transmitted to the client device from the upper layer application of the information processing unit and transfer the second data to the application data transmitting buffer of the information processing unit; and

a flow control transmission management section to acquire the second data from the application data transmitting buffer of the information processing unit and transmit the second data to the client device based on a data size receivable by the client device, wherein the data size receivable by the client device is supplied from the client device; and

the client device further comprises;

a data receiving section to receive the second data transmitted from the information processing unit, the data receiving section comprising;

an application data receiving buffer to store the second data transmitted from the information processing unit;

an application data receiving section to acquire the second data transmitted from the information processing unit from the application data receiving buffer of the client device and transmit the second data to the upper layer application of the client device; and

a flow control reception management section to monitor a free space in the application data receiving buffer and supply a data size receivable by the application data receiving buffer to the information processing unit, and transfer the second data transmitted from the information processing unit to the application data receiving buffer of the client device.