Information processing apparatus, and information processing method

• US 8,417,835 B2
• Filed: 04/05/2010
• Issued: 04/09/2013
• Est. Priority Date: 04/08/2009
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takasaka, Michiaki, Ishikawa, Hisashi
• Primary Examiner(s): Alrobaye, Idriss N
• Assistant Examiner(s): Yimer, Getente A
• Application Number:
  US12/754,481
• Publication Number:
  US 20100262719A1
• Time in Patent Office: 1,100 Days
• Field of Search: 710 1- 5, 710/28, 710/32, 710/36, 710/44, 710/55, 710/100, 710/307
• US Class Current: 710/3
• CPC Class Codes: H04L 12/42 Loop networks

Abstract

There is provided an apparatus including a plurality of modules. Each module includes a storage unit configured to store a waiting ID and a specific ID of the module, a communication unit configured to transmit and receive packets to and from a bus, and a processing unit configured to process data of a packet which includes a valid flag indicating that the packet is valid, wherein the communication unit takes in data held by a packet which has an ID that coincides with the waiting ID, and stores the processed data in a packet which includes the valid flag indicating invalid and an ID coincident with the specific ID, and transmits the packet.

Claims

1. An apparatus including a plurality of modules, each module comprising:

a storage unit configured to store a waiting ID and a specific ID of the module;

a communication unit configured to transmit and receive packets to and from a ring bus; and

a processing unit configured to process data of a valid packet which includes a flag having a first value indicating that the packet is valid among the received packets,

wherein the communication unit takes in data held by a packet which has a packet ID that coincides with the waiting ID and transmit the packet, and stores the processed data in an empty packet which includes the flag having a second value indicating invalid and a packet ID coincident with the specific ID,

wherein total number of valid and empty packets transmitting on the ring bus is about the same.

2. The apparatus according to claim 1, further comprising a setting unit configured to set the specific ID and the waiting ID for each of the modules, and to cause the plurality of the modules to execute pipeline processing in a predetermined sequential order.

3. The apparatus according to claim 2, wherein the setting unit arranges a packet which has the ID in the communication unit of each of the modules.

4. The apparatus according to claim 3, wherein the setting unit allocates each of the specific IDs of the modules to at least one packet.

5. The apparatus according to claim 3, wherein when each of specific IDs of the modules is allocated to a packet, the setting unit allocates the specific IDs in consideration of an interval at which the packets having the same ID are arranged.

6. The apparatus according to claim 1, wherein the communication unit sets a flag of a packet that has stored data to valid and transmits the packet to the bus.

7. The apparatus according to claim 1, wherein the communication unit sets a flag of a packet from which data is extracted to invalid and transmits the packet to the bus.

8. The apparatus according to claim 1, wherein when the flag is invalid, the communication unit stores and transmits the processed data up to a predetermined number of packets, even if a packets ID does not coincide with the specific ID.

9. The apparatus according to claim 1, wherein the packet includes a sharing flag indicating that a packet is shared by the plurality of the modules, and when the flag is invalid as to the packet which has the valid sharing flag, the communication unit stores and transmits the processed data in the packet even if the packet ID does not coincide with the specific ID.

10. The apparatus according to claim 1, wherein the storage unit is a register.

11. An apparatus including a plurality of modules, each module comprising:

a storage unit configured to store a specific ID of the module;

a communication unit configured to transmit and receive packets to and from a ring bus;

an identification unit configured to identify an ID and a flag having a first value indicating that a packet is valid; and

a processing unit configured to process data of the valid packet,

wherein the communication unit stores the processed data in an empty packet which has the flag having a second value indicating invalid and a packet ID coincident with the stored specific ID, and transmits the valid packet in a predetermined direction,

wherein total number of valid and empty packets transmitting on the ring bus is about the same.

12. The apparatus according to claim 11, further comprising a setting unit configured to set an ID to a packet, in the ring bus, wherein the setting unit sets an ID when a packet, to which an ID is not yet set, passes through.

13. The apparatus according to claim 11, further comprising a setting unit configured to set an ID to a packet, in the ring bus, wherein the setting unit sets an ID to a packet having the flag indicating invalid.

14. The apparatus according to claim 12, wherein the setting unit performs control so that an interval of packets which have the same ID to become equal to or greater than a control interval.

15. The apparatus according to claim 14, wherein the setting unit stores the control interval for each of the IDs, and performs control so that the interval of packets which have the same ID to become equal to or greater than the control interval according to the ID.

16. An information processing apparatus including a plurality of modules, each modules comprising:

a storage unit configured to store a specific ID of the module;

a communication unit configured to transmit and receive packets to and from a ring bus; and

a processing unit configured to process data of a packet which includes a flag having a first value indicating that a packet is valid,

wherein the communication unit stores the processed data in an empty packet, including the flag having a second value, of which a packet ID coincides with the stored specific ID and transmits the valid packet,

wherein total number of valid and empty packets transmitting on the ring bus is about the same.

17. A method for processing in an apparatus including a plurality of modules, the method comprising:

storing a specific ID of a module from the plurality of modules;

transmitting and receiving packets to and from a ring bus;

processing data of a packet which includes a flag having a first value indicating that the packet is valid; and

storing the processed data in an empty packet which includes the flag, having a second value, indicating invalid and a packet ID coincident with the specific ID, and transmitting the valid packet,

wherein total number of valid and empty packets transmitting on the ring bus is about the same.

18. A method for controlling an apparatus including a plurality of modules, the method comprising:

storing a specific ID of a module of the plurality of modules;

transmitting and receiving packets to and from a ring bus;

processing data of a packet which includes a flag having a first value indicating that the packet is valid; and

storing the processed data in an empty packet, including the flag having a second value of which a packet ID coincides with the stored specific ID and transmitting the valid packet,

wherein total number of valid and empty packets transmitting on the ring bus is about the same.