Communication control apparatus and communication control method

• US 20060280203A1
• Filed: 09/19/2005
• Published: 12/14/2006
• Est. Priority Date: 06/14/2005
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kawai, Jun, Jinzaki, Akira, Shitami, Junichiro, Shimokuni, Osamu
• Granted Patent: US 7,693,063 B2
• Time in Patent Office: Days
• US Class Current: 370/465
• CPC Class Codes: H04L 1/004 by using forward error control H04L1/0618 takes precedence; coding, decoding or code conversion, for error detection or correction H03M13/00
• CPC Class Codes: H04L 63/18 using different networks or channels, e.g. using out of band channels cryptographic mechanisms or cryptographic arrangements for key distribution involving distinctive intermediate devices or communication paths H04L9/0827; cryptographic mechanisms or cryptographic arrangements for authentication using a plurality of channels H04L9/3215
• CPC Class Codes: H04L 9/085 Secret sharing or secret splitting, e.g. threshold schemes

Abstract

To provide a technology enabling a quality of service (QoS) to be kept, the security against interception to be ensured and a communication route to be switched over without interruption of communications, and capable of restraining processing time and the number of adjusting parameters. Coding is effected by such a type of coding method that when coding communication information into information blocks by dividing the communication information into a plurality of information blocks, there are needed the information blocks of which the number is equal to or larger than a predetermined threshold value in order to decode the information blocks into the original communication information, when there are two or more usable communication routes in the case of sending the information blocks to a partner communication device, the information blocks are allocated to each of the communication routes in such a way that the number of information blocks to be sent per communication route is set less than the threshold value required for decoding the information blocks, and the allocated number of information blocks are sent to each of the communication routes.

Claims

1. A communication control apparatus comprising:

a coding unit coding by a type of coding method, wherein communication information is divided into a plurality of information blocks by said type of coding method and a number of the information blocks equal to or larger than a predetermined threshold value are needed in order to decode the information blocks into the original communication information;

an allocating unit allocating, when there are two or more usable communication routes in the case of sending the information blocks to a partner communication apparatus, the information blocks to each of the communication routes in such a way that the number of information blocks to be sent per communication route is set less than the threshold value required for decoding the information blocks; and

a unit sending the allocated number of information blocks to each of the communication routes.

2. A communication control apparatus according to claim 1, wherein the coding unit uses an SSS (Secret Sharing Scheme) coding method.

3. A communication control apparatus according to claim 1, wherein the allocating unit further includes:

a unit calculating an evaluation value representing a communication quality of every communication route; and

a unit allocating the information blocks at a predetermined rate to each of the communication route from the communication route exhibiting the largest evaluation value sequentially.

6. A communication control apparatus according to claim 1, wherein the allocating unit further includes:

a unit calculating an evaluation value representing a communication quality of every communication route; and

a unit allocating the information blocks at a predetermined rate to each of the communication route from the communication route exhibiting the smallest evaluation value sequentially.

4. A communication control apparatus comprising:

a receiving unit receiving information blocks defined as communication information coded by such a type of coding method that, when communication information is divided into a plurality of information blocks by said type of coding method, a number of the information blocks equal to or larger than a predetermined threshold value are needed in order to decode the information blocks into the original communication information; and

a unit decoding the information blocks into the communication information by using the information blocks with a number of the threshold value needed for decoding the information blocks received by the receiving unit into the communication information.

5. A communication control method comprising:

a coding step of coding by a type of coding method, wherein communication information is divided into a plurality of information blocks by said type of coding method and a number of the information blocks equal to or larger than a predetermined threshold value are needed in order to decode the information blocks into the original communication information;

an allocating step of allocating, when there are two or more usable communication routes in the case of sending the information blocks to a partner communication apparatus, the information blocks to each of the communication routes in such a way that the number of information blocks to be sent per communication route is set less than the threshold value required for decoding the information blocks; and

a step of sending the allocated number of information blocks to each of the communication routes.

7. A communication control method according to claim 5 wherein the coding step uses an SSS (Secret Sharing Scheme) coding method.

8. A communication control method according to claim 5, wherein the allocating step includes further executing:

a step of calculating an evaluation value representing a communication quality of every communication route; and

a step of allocating the information blocks at a predetermined rate to each of the communication route from the communication route exhibiting the largest value sequentially.

9. A communication control method according to claim 5, wherein the allocating step includes further executing:

a step of calculating an evaluation value representing a communication quality of every communication route; and

a step of allocating the information blocks at a predetermined rate to each of the communication route from the communication route exhibiting the smallest value sequentially.

10. A communication control method comprising:

a receiving step of receiving information blocks defined as communication information coded by such a type of coding method that when coding the communication information into the information blocks by dividing the communication information into a plurality of information blocks, there are needed the information blocks of which the number is equal to or larger than a predetermined threshold value in order to decode the information blocks into the original communication information; and

a step of decoding the information blocks into the communication information by using the information blocks of which the number is coincident with the threshold value needed for decoding into the communication information in the information blocks received in the receiving step.