DATA TRANSFER DEVICE AND DATA TRANSFER METHOD

• US 20120096195A1
• Filed: 09/06/2011
• Published: 04/19/2012
• Est. Priority Date: 10/15/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: NEGISHI, Tatsuhiko, SHIRASE, Kenji
• Granted Patent: US 8,671,230 B2
• Time in Patent Office: Days
• US Class Current: 710/34
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: G06F 2213/3802 Harddisk connected to a computer port
• CPC Class Codes: H04L 49/9063 Intermediate storage in different physical parts of a node or terminal

Abstract

A data transfer device includes a storage controller that stores received response data in a buffer with respect to each piece of identification information included in the response data when receiving the response data from a first device, the response data being transferred from the first device in response to a transfer request transferred from a second device, a counting unit that counts a number of pieces of the response data stored in the buffer by the storage controller with respect to each piece of the identification information, and a determination unit that determines whether the number counted by the counting unit reaches a specified value preliminarily set with respect to each piece of the identification information.

Claims

1. A data transfer device comprising:

a storage controller that stores received response data in a buffer with respect to each piece of identification information included in the response data when receiving the response data from a first device, the response data being transferred from the first device in response to a transfer request transferred from a second device;

a counting unit that counts a number of pieces of the response data stored in the buffer by the storage controller with respect to each piece of the identification information;

a determination unit that determines whether the number counted by the counting unit reaches a specified value preliminarily set with respect to each piece of the identification information; and

a transfer unit that

reads out, from the buffer, the response data corresponding to the identification information in which the number of the corresponding response data being determined to reach the specified value by the determination unit, and

transfers the read response data to the second device.

2. The data transferring device according to claim 1, further comprising:

a division number storage unit that stores a division number of the response data as the specified value with respect to the identification information when receiving the identification information and the division number identified by the identification information from the second device;

and wherein the counting unit

counts the number of the response data by obtaining the division number corresponding to the identification information of the response data from the division number stored in the division number storage unit, sets an initial value of a counter of the counting unit by using the obtained division number, and decrementing a value of the counter when receiving the response data from the storage controller,

the determination unit determines that the number reaches the division number when the value of the counter is “

0”

, and

the transfer unit

reads out, from the buffer, the response data corresponding to the identification information in which the number of the corresponding response data determined to reach the division number by the determination unit, and

transfers the read response data to the second device.

3. The data transferring device according to claim 1, wherein

the buffer includes a plurality of entries each of which is a group of data in which a response header storage region that stores the identification information, a response data storage region that stores the response data with respect to each piece of the identification information, and a count value storage region that stores a numerical value used for counting the response data are associated as a group, and

the storage controller,

stores the response data in the response data storage region of an entry corresponding to the response header storage region when the identification information of the received response data is stored in at least one of the response header storage regions, and

stores the received identification information of the response data in an empty entry of the response header storage region and stores the received response data in the empty entry of the response data storage region, when the identification information of the received response data is not stored in any of the response header storage regions, and

the counting unit updates the numerical value stored in the count value storage region of the entry corresponding to the response header storage region in which the identification information of the received response data is stored.

4. A data transfer method performed by a data transfer device including a storage controller, a counting unit, a determination unit and a transfer unit, the data transfer method comprising:

storing, by the storage controller, received response data in a buffer with respect to each piece of identification information included in the response data when receiving the response data from a first device, the response data being transferred from the first device in response to a transfer request transferred from a second device;

counting, by the counting unit, a number of pieces of the response data stored in the buffer by the storage controller with respect to each piece of the identification information;

determining, by the determination unit, whether the number counted by the counting unit reaches a specified value preliminarily set with respect to each piece of the identification information; and

reading out, by the transfer unit, from the buffer, the response data corresponding to the identification information in which the number of the corresponding response data being determined to reach the specified value by the determination unit, and

transferring, by the transfer unit, the read response data to the second device.

5. A data transfer method executed by a processor, the data transfer method comprising:

storing received response data in a buffer with respect to each piece of identification information included in the response data when receiving the response data from a first device, the response data being transferred from the first device in response to a transfer request transferred from a second device;

counting a number of pieces of the response data stored in the buffer with respect to each piece of the identification information;

determining whether the number reaches a specified value preliminarily set with respect to each piece of the identification information; and

reading out, from the buffer, the response data corresponding to the identification information in which the number of the corresponding response data being determined to reach the specified value, and

transferring the read response data to the second device.