Information processing apparatus and information processing method

• US 20050226171A1
• Filed: 04/11/2005
• Published: 10/13/2005
• Est. Priority Date: 04/12/2004
• Status: Abandoned Application

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Uchikawa, Shinichi
• Application Number:
  US11/103,305
• Publication Number:
  US 20050226171A1
• Time in Patent Office: Days
• US Class Current: 370/254
• CPC Class Codes: H04L 47/286 Time to live
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services

Abstract

An information processing apparatus connected to a plurality of devices through a communication medium is provided. The apparatus includes a transmitting unit adapted to transmit a search request to one or more devices existing in a first area; a receiving unit adapted to receive a response to the search request from one or more devices; and a control unit adapted to control the transmitting unit to transmit the search request to one or more devices existing in a second area when the number of devices that have responded to the search request transmitted by the transmitting unit is less than a predetermined number.

Claims

1. An information processing apparatus connected to a plurality of devices through a communication medium, the apparatus comprising:

a transmitting unit adapted to transmit a search request to one or more devices existing in a first area;

a receiving unit adapted to receive a response to the search request from one or more devices; and

a control unit adapted to control the transmitting unit to transmit the search request to one or more devices existing in a second area when the number of devices that have responded to the search request transmitted by the transmitting unit is less than a predetermined number.

2. The information processing apparatus according to claim 1, wherein the second area includes the first area and is wider than the first area.

3. The information processing apparatus according to claim 1, wherein the control unit allows the transmitting unit to transmit the search request to the one or more devices existing in the second area when no device responds to the search request transmitted by the transmitting unit.

4. The information processing apparatus according to claim 1, further comprising an input unit adapted to allow a user to input the predetermined number.

5. The information processing apparatus according to claim 1, wherein the first area is a sub-network to which the information processing apparatus belongs and the second area is any sub-network to which the information processing apparatus does not belong.

6. An information processing apparatus connected to a plurality of devices through a network, the apparatus comprising:

a transmitting unit adapted to transmit a search request for searching for one or more devices to the network;

a receiving unit adapted to receive a response to the search request;

a determining unit adapted to determine whether the number of devices satisfying the search request is less than a predetermined number; and

a control unit adapted to control the transmitting unit to retransmit the search request by widening a range within which the search request is transmitted if it has been determined that the number of devices satisfying the search request is less than the predetermined number.

7. The information processing apparatus according to claim 6, further comprising an input unit adapted to allow a user to input the range within which the search request is retransmitted.

8. The information processing apparatus according to claim 6, wherein the search request transmitted by the transmitting unit is transmitted by multicast and the range within which the search request is transmitted is controlled by time to live.

9. The information processing apparatus according to claim 6, further comprising an input unit adapted to allow a user to input an upper limit of the range that is widened before retransmitting the search request.

10. An information processing apparatus connected to a plurality of devices through a network, the apparatus comprising:

a transmitting unit adapted to transmit a search request for searching for one or more devices to the network;

a receiving unit adapted to receive a response to the search request;

a determining unit adapted to determine whether the number of devices satisfying the search request is greater than a predetermined number; and

a control unit adapted to control the transmitting unit to retransmit the search request by narrowing a range within which the search request is transmitted if it has been determined that the number of devices satisfying the search request is greater than the predetermined number.

11. The information processing apparatus according to claim 10, further comprising an input unit adapted to allow a user to input the range within which the search request is retransmitted.

12. The information processing apparatus according to claim 10, wherein the search request transmitted by the transmitting unit is transmitted by multicast and the range within which the search request is transmitted is controlled by time to live.

13. The information processing apparatus according to claim 10, further comprising an input unit adapted to allow a user to input a lower limit of the range that is narrowed before retransmitting the search request.

14. An information processing method in an information processing apparatus connected to a plurality of devices through a communication medium, the method comprising:

a transmitting step of transmitting a search request to one or more devices existing in a first area;

a receiving step of receiving a response to the search request from one or more devices; and

a control step of controlling a transmitting unit to transmit the search request to one or more devices existing in a second area when the number of devices that have responded to the search request transmitted in the transmitting step is less than a predetermined number.

15. A computer-readable storage medium for allowing an information processing apparatus connected to a plurality of devices through a network to execute steps according to claim 14.

16. An information processing method in an information processing apparatus connected to a plurality of devices through a network, the method comprising:

a transmitting step of transmitting a search request for searching for one or more devices to the network;

a receiving step of receiving a response to the search request;

a determining step of determining whether the number of devices satisfying the search request is less than a predetermined number; and

a control step of controlling a transmitting unit to retransmit the search request by widening a range within which the search request is transmitted if it has been determined that the number of devices satisfying the search request is less than the predetermined number.

17. A computer-readable storage medium for allowing an information processing apparatus connected to a plurality of devices through a network to execute steps according to claim 16.

18. An information processing method in an information processing apparatus connected to a plurality of devices through a network, the method comprising:

a transmitting step of transmitting a search request for searching for one or more devices to the network;

a receiving step of receiving a response to the search request;

a determining step of determining whether the number of devices satisfying the search request is greater than a predetermined number; and

a control step of controlling a transmitting unit to retransmit the search request by narrowing a range within which the search request is transmitted if it has been determined that the number of devices satisfying the search request is greater than the predetermined number.

19. A computer-readable storage medium for allowing an information processing apparatus connected to a plurality of devices through a network to execute steps according to claim 18.