Network scanner contention handling method

• US 6,223,223 B1
• Filed: 09/30/1998
• Issued: 04/24/2001
• Est. Priority Date: 09/30/1998
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Company (HP Inc.)
• Inventors: Smith, David L., Kumpf, David A., Garcia, Glenn R., Scoville, Dean L.
• Primary Examiner(s): Geckil, Mehmet B.
• Application Number:
  US09/163,496
• Time in Patent Office: 937 Days
• Field of Search: 709/227, 709/203, 709/223, 709/224, 709/201, 709/217, 709/218, 709/219, 710/8, 710/19
• US Class Current: 709/227
• CPC Class Codes: H04N 1/00204 with a digital computer or a digital computer system, e.g. an internet server programmed control between transmitter and receiver or between image input and image output device H04N1/32561
• CPC Class Codes: H04N 2201/0015 Control of image communication with the connected apparatus, e.g. signalling capability

Abstract

A network peripheral support method including a client with a general purpose software capability and a server connected to the peripheral. The server of the present invention waits for a client to attempt to open a connection with the peripheral. The client sends a peripheral connection request via a data packet to the server, and the server accepts the connection. The server determines an availability of the peripheral and locks the peripheral so that it cannot be used by other clients. Thereafter, the server opens a connection with the peripheral, if it is available, and notifies the client of the peripheral availability. The server then waits for predetermined data from the client, which when received, results in the client having control of the peripheral for at least a first predetermined time period, and when received sends the data to the client. The server closes the connection with the client upon completion of sending the data to the client.

Claims

1. A method of supporting at least one peripheral in a network including at least one client with a general purpose software capability and a server connected to the peripheral, the method comprising steps of:

the server waiting for a client to attempt to open a connection with the peripheral;

the client sending a peripheral connection request to the server;

the server accepting connection with the client via exchange of data packets;

the server determining availability of the peripheral and locking the peripheral so that it cannot be used by other clients;

the server opening a connection with the peripheral if it is available and notifying the client of the peripheral availability;

the server waiting for predetermined data from the client, which when received, results in the client having control of the peripheral for at least a first predetermined time period;

the server waiting for data from the peripheral and when received sends the data to the client;

the server closing the connection with the client upon completion of sending the data to the client.

2. A method as defined in claim 1 wherein said peripheral is adapted to perform a scan operation.

3. A method as defined in claim 1 wherein said server/client connection is closed in the event no data is sent between the peripheral and the client within a second predetermined time period.

4. A method as defined in claim 3 wherein said predetermined time period is approximately 5 minutes.

5. A method as defined in claim 1 wherein the server includes an associated state machine, the server determining availability of the peripheral by checking its associated state machine.

6. A method as defined in claim 1 wherein said client attempts to establish a connection with the peripheral by sending a TCP/IP or SPX request to the server.

7. A method as defined in claim 1 wherein the server sends an unavailability status indication to the client in the event the peripheral is unavailable, the client then displays an error signal and the server closes the server/peripheral connection.

8. A method as defined in claim 3 wherein said server/client connection is closed by the client in the event predetermined peripheral operating conditions do not occur within a second predetermined time period.

9. A method as defined in claim 8 wherein said second predetermined time period is less than said first predetermined time period.

10. A method as defined in claim 8 wherein said predetermined peripheral operating conditions comprise one of detecting a scan operation being commenced and paper being inserted into the peripheral.

11. A method as defined in claim 1 wherein said peripheral availability determining step includes determining whether the peripheral has a busy status or an idle status.

12. A method as defined in claim 1 wherein said predetermined data comprises the client identification.

13. A method of supporting a scan peripheral on a network having at least one client with a general purpose software capability and a server connected to the peripheral, the method comprising steps of:

the server waiting for a client to attempt to open a connection with the peripheral;

the client discovering the address of the server;

the client sending a scan peripheral connection request to the server;

the server accepting connection with the client;

the server determining the busy or idle status of the peripheral and locking the peripheral when it has an idle status so that it cannot be used by other clients;

the server opening a connection with the peripheral if it is idle and notifying the client of the peripheral idle status;

the server waiting for predetermined data from the client which when received, results in the client having control of the peripheral for at least a first predetermined time period during which the client can initiate a scan operation by the peripheral;

the server waiting for data from the peripheral and when received sends the data to the client;

the server closing the connection with the client upon completion of sending the data to the client.

14. A method as defined in claim 13 wherein the server sets a server idle timer upon opening a connection with the client and with the peripheral, the server monitoring transfer of data between the peripheral and the client, and resetting said server idle time upon transfer of data between the same, and closing the connection with the peripheral in the event transfer of data does not occur within a second predetermined time period.

15. A server for supporting the operation of a scan peripheral connected in a network having at least one client with a general purpose software capability, the server being connected to the scan peripheral via the network, the server comprising:

means for responding to a client generated scan request and accepting a connection with the client;

means for accepting a connection from the client;

means for determining the busy or idle status of the peripheral and locking the peripheral when it has an idle status so that it cannot be used by other clients, and for opening a connection with the peripheral if it is idle and notifying the client of the peripheral idle status;

means for providing control of the peripheral for at least a first predetermined time period during which the client can initiate a scan operation by the peripheral responsive to the server receiving predetermined data from the client;

the server being adapted to wait for data from the peripheral and send the data to the client when received;

the server closing the connection with the client upon completion of sending the data to the client.