Information processing system and control method thereof

• US 6,088,737 A
• Filed: 10/22/1997
• Issued: 07/11/2000
• Est. Priority Date: 10/25/1996
• Status: Expired due to Term

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Fukasawa, Toshihiko, Yano, Koichi
• Primary Examiner(s): Coulter, Kenneth R.
• Application Number:
  US08/955,693
• Time in Patent Office: 993 Days
• Field of Search: 709/224, 709/235, 709/234, 709/203, 709/218, 709/219, 709/217, 370/229
• US Class Current: 709/235
• CPC Class Codes: G06F 2209/5013 Request control
• CPC Class Codes: G06F 9/505 considering the load

Abstract

Information processing system and control method thereof is provided. A camera server apparatus determines, upon receiving a connection request from a client, whether or not an additional client to the number of clients who are currently being connected would exceed a permissible number. If it is determined that the number of clients exceeds the permissible number, image data is not transferred to the client apparatus which has just sent the connection request, instead, information indicative of the current access state is transferred. Accordingly, the client side is able to know the access state of the camera server with which the client wants to connect.

Claims

1. An information processing system constructed by including a server which obtains and transfers data in real time and a client who processes data transmitted by the server, said server comprising:

determining means for determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number which is varied in accordance with a condition of said server; and

transferring means for transferring access state information, which indicates how congested the server is, to the client who has transmitted a predetermined type of access request, in accordance with the determining result made by said determining means, and said client comprising;

displaying means for, upon transmitting the predetermined type of access request to the server and receiving the access state information from said transferring means, displaying the access state on the basis of the access state information.

2. An information processing system constructed by including a server and a client who processes data transmitted by the server, said server comprising:

determining means for determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number; and

transferring means for transferring access state information, which indicates how congested the server is, to the client who has transmitted a predetermined type of access request, in accordance with the determining result made by said determining means, and said client comprising;

displaying means for, upon transmitting the predetermined type of access request to the server and receiving the access state information from said transferring means, displaying the access state on the basis of the access state information; and

wherein the access state information transferred by said transferring means includes the number of present accesses, the number of accesses rejected in the last predetermined time period and the number of accesses permitted in the last predetermined time period.

3. An information processing system constructed by including a server and a client who processes data transmitted by the server, said server comprising:

determining means for determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number, and

transferring means for transferring access state information, which indicates how congested the server is, to the client who has transmitted a predetermined type of access request, in accordance with the determining result made by said determining means, said client comprising;

displaying means for, upon transmitting the predetermined type of access request to the server and receiving the access state information from said transferring means, displaying the access state on the basis of the access state information; and

wherein the access state information transferred by said transferring means includes the number of received accesses counted in a predetermined time interval, the number of rejected accesses counted in the predetermined time interval and the number of permitted accesses counted in the predetermined time interval.

4. The information processing system according to claim 3, wherein said displaying means displays a graph on the basis of the access state information transferred by said transferring means.

5. An information processing system constructed by including a server and a client who processes data transmitted by the server, said server comprising:

determining means for determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number; and

transferring means for transferring access state information, which indicates how congested the server is, to the client who has transmitted a predetermined type of access request, in accordance with the determining result made by said determining means, and said client comprising;

displaying means for, upon transmitting the predetermined type of access request to the server and receiving the access state information from said transferring means, displaying the access state on the basis of the access state information;

wherein the server transmits image data to the client, and the predetermined type of access request includes a connection request to be connected with the server to receive the image data; and

wherein the client further comprises request means for requesting to transfer the access state information by the transferring means, while receiving and displaying the image data from the server.

6. A server for transferring image data to a client in a remote location in accordance with an instruction from the client, comprising:

determining means for, in a case where a predetermined type of access request is transmitted by the client, determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number;

transferring means for, in a case where said determining means determines that the number of the access requests exceeds the permissible number, transferring access state information, which indicates how congested the server is, to the client; and

wherein the server transfers an image sensed by controllable image sensing means, and the predetermined type of access request includes a control request to control operation of the image sensing means.

7. A server for transferring image data to a client in a remote location in accordance with an instruction from the client, comprising:

determining means for, in a case where a predetermined type of access request is transmitted by the client, determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number;

transferring means for, in a case where said determining means determines that the number of the access requests exceeds the permissible number, transferring access state information, which indicates how congested the server is, to the client;

wherein the server transfers an image sensed by controllable image sensing means, and the predetermined type of access request includes a control request to control operation of the image sensing means; and

wherein the access state information transferred by said transferring means includes the number of present accesses, the number of accesses rejected in the last predetermined time period and the number of accesses permitted in the last predetermined time period.

8. A server for transferring image data to a client in a remote location in accordance with an instruction from the client, comprising:

determining means for, in a case where a predetermined type of access request is transmitted by the client, determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number;

transferring means for, in a case where said determining means determines that the number of the access requests exceeds the permissible number, transferring access state information, which indicates how congested the server is, to the client; and

wherein the access state information transferred by said transferring means includes the number of received accesses counted in a predetermined time interval, the number of rejected accesses counted in a predetermined time interval and the number of permitted accesses counted in a predetermined time interval.

9. A server for transferring image data to a client in a remote location in accordance with an instruction from the client, comprising:

determining means for, in a case where a predetermined type of access request is transmitted by the client, determining whether or not a number of predetermined types of access requests received by the server exceeds a predetermined permissible number;

transferring means for, in a case where said determining means determines that the number of the access requests exceeds the permissible number, transferring access state information, which indicates how congested the server is, to the client;

wherein the predetermined type of access request includes a connection request from the client which requests the server to transfer the image data;

further comprising control means for activating said transferring means in accordance with the request from the client, during transfer of the image data to the client.

10. A server for transferring image data to a client in a remote location in accordance with an instruction from the client, comprising:

determining means for, in a case where a predetermined type of access request is transmitted by the client, determining whether or not a number of predetermined types of access quests received by the server exceeds a predetermined permissible number;

transferring means for, in a case where said determining means determines that the number of the access requests exceeds the permissible number, transferring access state information, which indicates how congested the server is, to the client;

wherein the server transfers an image sensed by controllable image sensing means, and the predetermined type of access request includes a control request to control operation 5 of the image sensing means.

11. The server according to claim 10, said transferring means generates image data on the basis of the access state information indicative of the access state, and transfers the generated image data to the client as an image sensed by the image sensing means.

12. A client to be connected with a server which transfers image data, comprising:

request transmitting means for transmitting a predetermined type of access request to the server;

displaying means for, upon transmitting the predetermined type of access request by said request transmitting means and receiving access state information indicative of an access state from the server, displaying the access state on the basis of the access state information;

wherein the server transfers an image sensed by controllable image sensing means, and the predetermined type of access request includes a control request to control operation of the image sensing means.

13. The client according to claim 12, the predetermined type of access request includes a connection request which requests the server to transfer image data.

14. A control method of controlling a server which transfers an image sensed by a camera apparatus to a client in a remote location in accordance with an instruction from the client, comprising:

a determining step of determining whether or not a number of predetermined types of access requests received by the server is within a predetermined permissible range;

a transferring step of transferring access state information, which indicates how congested the server is, to the client in accordance with the determination in said determining step; and

wherein the access state information includes the number of present accesses, the number of accesses rejected in the last predetermined time period and the number of accesses permitted in the last predetermined time period.

15. A control method of controlling a client who is to be connected with a server which transfers image data, comprising:

a request transmitting step of transmitting a predetermined type of access request to the server;

a displaying step of displaying, upon transmitting the predetermined type of access request in said request transmitting step and receiving access state information, which indicates how congested the server is, from the server, displaying the access state on the basis of the access state information; and

wherein the server transfers an image sensed by controllable image sensing means, and the predetermined type of access request includes a control request to control operation of the image sensing operations.

16. A monitor system for monitoring an operation state of a service system which provides a predetermined service in a computer network, comprising:

a monitor module communicable with other modules, which is provided separately from a plurality of service modules entered into the service system;

receiving means for receiving, in said monitor module, a message from the plurality of service modules;

communication means for performing communication between said monitor module and the plurality of service modules on the basis of the message;

processing means for executing corresponding processing on the basis of contents notified by said communications means; and

wherein the message is a request message for requesting a notification of an operation state of a service module, said communication means receives the notification of an operation state from the service module which is designated by the request message.

17. The monitor system according to claim 16, wherein said processing means notifies the operation state to the service module which has transmitted the request message, on the basis of the contents notified by said communication means.

18. The monitor system according to claim 16, further comprising detecting means for detecting occurrence of an event on the basis of information received by said receiving means and said communication means, wherein said processing means executes the event detected by said detecting means.

19. The monitor system according to claim 18, wherein said detecting means includes an event table in which an event to be detected and corresponding process contents are registered, and detects occurrence of the event registered in the event table on the basis of the information received by said receiving means and communication means,

and wherein said processing means executes the corresponding process registered in the event table when the event is detected by said detecting means.

20. The monitor system according to claim 18, further comprising registering means for receiving information indicative of an event and corresponding process contents from the service module and registering the received information in the event table.

21. The monitor system according to claim 20, wherein the service system is a system adopting a server-client form, and said registering means receives information indicative of an event and corresponding process contents from a server of the service system and registers the received information in the event table.

22. The monitor system according to claim 18, wherein said monitor module further comprises a periodical requesting means for transmitting a request to the service module to notify a predetermined information at predetermined intervals, and said detecting means detects, based on a response to the request of said periodical requesting means, whether or not the event registered in the event table has occurred.

23. The monitor system according to claim 16, wherein said monitor module is provided as an independent program.

24. The monitor system according to claim 16, wherein each of the plurality of service modules has a monitor-subjected module, comprising:

transmitting/receiving means for transmitting the request message to the monitor module and receiving operation information transmitted by said processing means; and

displaying means for displaying an operation state for an operator on the basis of the received operation information.

25. The monitor system according to claim 24, wherein said monitor-subjected module further comprises state notifying means for notifying an operation state to the monitor module in response to the request for notification of the operation state transmitted from the monitor module by said communication means.

26. The monitor system according to claim 24, wherein said monitor-subjected module is provided by being incorporated in a module whose operation state is subjected to be monitored.

27. The monitor system according to claim 24, wherein said displaying means displays the operation state received by said transmitting/receiving means with figures having different colors, each figure representing each of the modules.

28. The monitor system according to claim 27, wherein said displaying means shows a connection relation of each of the modules in the service system and a data communication state among the modules, by displaying a line which connects the figures representing respective modules and a thickness of the line, on the basis of the operation state of each service module received by said transmitting/receiving means.

29. The monitor system according to claim 28, further comprising operation means for changing the operation state of each service module and the state of data communication between the modules by operating the figures displayed by said displaying means.

30. The monitor system according to claim 24, wherein said monitor-subjected module further comprises event notifying means for notifying an event to be registered by said registering means in the monitor module.

31. The monitor system according to claim 30, wherein said event notifying means specifies for the monitor module, an event occurrence condition, processing to be performed at the time of event occurrence and information to be added to an event.

32. The monitor system according to claim 30, wherein the service system is a system adopting a server-client form, and said event notifying means is incorporated in the monitor-subjected module of the server.

33. The monitor system according to claim 16, wherein said monitor module is provided by being incorporated in each service module which is entered in the service system.

34. The monitor system according to claim 30, wherein each module in the service system comprises said event notifying means.

35. The monitor system according to claim 16, wherein the service system is an image transmission service which obtains an image by controlling a camera in accordance with an instruction from a client apparatus and transmits the obtained image to the client apparatus.