COMMUNICATION DEVICE

• US 20120198090A1
• Filed: 01/23/2012
• Published: 08/02/2012
• Est. Priority Date: 01/31/2011
• Status: Active Grant

• Current Assignee: Brother Kogyo Kabushiki Kaisha (Brother Industries Limited)
• Original Assignee: Brother Kogyo Kabushiki Kaisha (Brother Industries Limited)
• Inventors: SAITO, Ken
• Granted Patent: US 9,762,511 B2
• Time in Patent Office: Days
• US Class Current: 709/236
• CPC Class Codes: H04L 49/90 Buffering arrangements

Abstract

A communication device may comprise a sending buffer having a first storage capacity, and a receiving buffer having a second storage capacity which is different from the first storage capacity. The communication device may determine a sending maximum data size in accordance with the first storage capacity, and determine a receiving maximum data size in accordance with the second storage capacity. The sending maximum data size and the receiving maximum data size may have different values. The communication device may perform a sending process for a sending frame of a sending target by utilizing the sending maximum data size, and perform a receiving process for a receiving frame of a receiving target by utilizing the receiving maximum data size.

Claims

1. A communication device configured to be connected with a network, the communication device comprising:

a sending buffer configured to store at least one sending frame to be sent to the network, the sending buffer having a first storage capacity;

a receiving buffer configured to store at least one receiving frame to be received from the network, the receiving buffer having a second storage capacity which is different from the first storage capacity;

one or more processors; and

a memory that stores a computer program including instructions executed by the one or more processors,

wherein the instructions cause the one or more processors, when executed by the one or more processors, to function as;

a determination unit configured to determine a sending maximum data size in accordance with the first storage capacity, and determine a receiving maximum data size in accordance with the second storage capacity, wherein the sending maximum data size is a maximum data size allowed as a data size of sending target data included in one sending frame, the receiving maximum data size is a maximum data size allowed as a data size of receiving target data included in one receiving frame, and the sending maximum data size and the receiving maximum data size have different values; and

a process performing unit configured to perform a sending process for a sending frame of a sending target by utilizing the sending maximum data size, and perform a receiving process for a receiving frame of a receiving target by utilizing the receiving maximum data size.

2. The communication device as in claim 1, wherein

the sending maximum data size is a sending MSS which is a maximum data size allowed as a data size of application data included in the one sending frame, and

the receiving maximum data size is a receiving MSS which is a maximum data size allowed as a data size of application data included in the one receiving frame.

3. The communication device as in claim 1, wherein

the sending maximum data size is a sending MTU which is a maximum data size allowed as a data size of an IP packet included in the one sending frame, and

the receiving maximum data size is a receiving MTU which is a maximum data size allowed as a data size of an IP packet included in the one receiving frame.

4. The communication device as in claim 1, wherein

the determination unit comprises:

a first obtaining unit configured to obtain a sending maximum frame size and a receiving maximum frame size, wherein the sending maximum frame size is a maximum data size of one sending frame that the sending buffer is capable of storing, the sending maximum frame size is determined in accordance with the first storage capacity, the receiving maximum frame size is a maximum data size of one receiving frame that the receiving buffer is capable of storing, and the receiving maximum frame size is determined in accordance with the second storage capacity; and

a second obtaining unit configured to obtain a designated data size which is a data size designated by a user,

wherein the sending maximum frame size and the receiving maximum frame size have different values,

at least one of the sending maximum frame size and the receiving maximum frame size is equal to or more than the designated data size, and

the determination unit is configured to determine at least one of the sending maximum data size and the receiving maximum data size based on a relationship of the sending maximum frame size, the receiving maximum frame size, and the designated data size.

5. The communication device as in claim 4, wherein

the following relationship is being satisfied:

the receiving maximum frame size>

the sending maximum frame size; and

the receiving maximum frame size≧

the designated data size,

in a case of the designated data size>

the sending maximum frame size,

the determination unit is configured to determine a value obtained utilizing the sending maximum frame size as a sending MSS which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the designated data size as a receiving MSS which is the receiving maximum data size.

6. The communication device as in claim 4, wherein

the following relationship is being satisfied:

the receiving maximum frame size>

the sending maximum frame size; and

the receiving maximum frame size≧

the designated data size,

in a case of the designated data size>

the sending maximum frame size,

the determination unit is configured to determine a value obtained utilizing the sending maximum frame size as a sending MTU which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the designated data size as a receiving MTU which is the receiving maximum data size.

7. The communication device as in claim 4, wherein

the following relationship is being satisfied:

the receiving maximum frame size>

the sending maximum frame size; and

the receiving maximum frame size≧

the designated data size,

in a case of the sending maximum frame size≧

the designated data size,

the determination unit is configured to determine a value obtained utilizing the designated data size as a sending MTU which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving maximum frame size as a receiving MTU which is the receiving maximum data size.

8. The communication device as in claim 4, wherein

the following relationship is being satisfied:

the receiving maximum frame size>

the sending maximum frame size; and

the receiving maximum frame size≧

the designated data size,

in a case of the designated data size≧

the sending maximum frame size,

the determination unit is configured to determine a value obtained utilizing the sending maximum frame size as a sending MTU which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving maximum frame size as a receiving MTU which is the receiving maximum data size.

9. The communication device as in claim 4, wherein

the determination unit further comprises a third obtaining unit configured to obtain a sending high performance frame size which is determined in accordance with the sending maximum frame size, and a receiving high performance frame size which is determined in accordance with the receiving maximum frame size,

an efficiency of the sending process for a sending frame having a data size which is identical to the sending high performance frame size is equal to or higher than an efficiency of the sending process for a sending frame having a data size which is identical to the sending maximum frame size,

an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving high performance frame size is higher than an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving maximum frame size,

the following relationship is being satisfied:

the receiving maximum frame size>

the receiving high performance frame size>

the sending maximum frame size≧

the sending high performance frame size; and

the receiving maximum frame size≧

the designated data size,

in a case of the receiving high performance frame size≧

the designated data size>

the sending high performance frame size,

the determination unit is configured to determine a value obtained utilizing the sending high performance frame size as a sending MSS which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the designated data size as a receiving MSS which is the receiving maximum data size.

10. The communication device as in claim 4, wherein

the determination unit further comprises a third obtaining unit configured to obtain a sending high performance frame size which is determined in accordance with the sending maximum frame size, and a receiving high performance frame size which is determined in accordance with the receiving maximum frame size,

an efficiency of the sending process for a sending frame having a data size which is identical to the sending high performance frame size is equal to or higher than an efficiency of the sending process for a sending frame having a data size which is identical to the sending maximum frame size,

an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving high performance frame size is higher than an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving maximum frame size,

the following relationship is being satisfied:

the receiving maximum frame size>

the receiving high performance frame size>

the sending maximum frame size≧

the sending high performance frame size; and

the receiving maximum frame size≧

the designated data size, in a case of the designated data size>

the receiving high performance frame size,

the determination unit is configured to determine a value obtained utilizing the sending high performance frame size as a sending MSS which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving high performance frame size as a receiving MSS which is the receiving maximum data size.

11. The communication device as in claim 4, wherein

the following relationship is being satisfied:

the sending maximum frame size>

the receiving maximum frame size; and

the sending maximum frame size≧

the designated data size,

in a case of the designated data size>

the receiving maximum frame size,

the determination unit is configured to determine a value obtained utilizing the designated data size as a sending MSS which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving maximum frame size as a receiving MSS which is the receiving maximum data size.

12. The communication device as in claim 4, wherein

the following relationship is being satisfied:

the sending maximum frame size>

the receiving maximum frame size; and

the sending maximum frame size≧

the designated data size,

in a case of the designated data size>

the receiving maximum frame size,

the determination unit is configured to determine a value obtained utilizing the designated data size as a sending MTU which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving maximum frame size as a receiving MTU which is the receiving maximum data size.

13. The communication device as in claim 4, wherein

the following relationship is being satisfied:

the sending maximum frame size>

the receiving maximum frame size; and

the sending maximum frame size≧

the designated data size,

in a case of the receiving maximum frame size≧

the designated data size,

the determination unit is configured to determine a value obtained utilizing the designated data size as a sending MTU which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving maximum frame size as a receiving MTU which is the receiving maximum data size.

14. The communication device as in claim 4, wherein

the determination unit further comprises a third obtaining unit configured to obtain a sending high performance frame size which is determined in accordance with the sending maximum frame size, and a receiving high performance frame size which is determined in accordance with the receiving maximum frame size,

an efficiency of the sending process for a sending frame having a data size which is identical to the sending high performance frame size is equal to or higher than an efficiency of the sending process for a sending frame having a data size which is identical to the sending maximum frame size,

an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving high performance frame size is higher than an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving maximum frame size,

the following relationship is being satisfied:

the sending maximum frame size≧

the sending high performance frame size>

the receiving maximum frame size>

the receiving high performance frame size; and

the sending maximum frame size≧

the designated data size,

in a case of the sending high performance frame size≧

the designated data size>

the receiving high performance frame size,

the determination unit is configured to determine a value obtained utilizing the designated data size as a sending MSS which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving high performance frame size as a receiving MSS which is the receiving maximum data size.

15. The communication device as in claim 4, wherein

the determination unit further comprises a third obtaining unit configured to obtain sending high performance frame size which is determined in accordance with the sending maximum frame size, and a receiving high performance frame size which is determined in accordance with the receiving maximum frame size,

an efficiency of the sending process for a sending frame having a data size which is identical to the sending high performance frame size is equal to or higher than an efficiency of the sending process for a sending frame having a data size which is identical to the sending maximum frame size,

an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving high performance frame size is higher than an efficiency of the receiving process for a receiving frame having a data size which is identical to the receiving maximum frame size,

the following relationship is being satisfied:

the sending maximum frame size≧

the sending high performance frame size>

the receiving maximum frame size>

the receiving high performance frame size; and

the sending maximum frame size≧

the designated data size,

in a case of the designated data size>

the sending high performance frame size,

the determination unit is configured to determine a value obtained utilizing the sending high performance frame size as a sending MSS which is the sending maximum data size, and

the determination unit is configured to determine a value obtained utilizing the receiving high performance frame size as a receiving MSS which is the receiving maximum data size.

16. The communication device as in claim 1, wherein the instructions cause the one or more processors, when executed by the one or more processors, to further function as:

a judging unit configured to judge whether the network is in a circumstance using a jumbo frame,

wherein in a case where it is judged that the network is in the circumstance using the jumbo frame, the determination unit is configured to determine the sending maximum data size in accordance with the first storage capacity, and the receiving maximum data size in accordance with the second storage capacity.

17. The communication device as in claim 16, wherein

the judging unit is configured to judge the network is in the circumstance using the jumbo frame in a case where a signal received from the network indicates that the network corresponds to the gigabit Ethernet, and

the judging unit is configured to judge the network is not in the circumstance using the jumbo frame in a case where the signal received from the network indicates that the network does not correspond to the gigabit Ethernet.

18. A communication device configured to be connected with a network, the communication device comprising:

a sending buffer configured to store at least one sending frame to be sent to the network, the sending buffer having a first storage capacity;

a receiving buffer configured to store at least one receiving frame to be received from the network, the receiving buffer having a second storage capacity which is different from the first storage capacity;

a determination unit configured to determine a sending maximum data size in accordance with the first storage capacity, and determine a receiving maximum data size in accordance with the second storage capacity, wherein the sending maximum data size is a maximum data size allowed as a data size of sending target data included in one sending frame, the receiving maximum data size is a maximum data size allowed as a data size of receiving target data included in one receiving frame, and the sending maximum data size and the receiving maximum data size have different values; and

a process performing unit configured to perform a sending process for a sending frame of a sending target by utilizing the sending maximum data size, and perform a receiving process for a receiving frame of a receiving target by utilizing the receiving maximum data size,