Network interface board for digital copier

• US 5,724,555 A
• Filed: 03/23/1995
• Issued: 03/03/1998
• Est. Priority Date: 03/23/1995
• Status: Expired due to Term

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Wadsworth, Robert D.
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): Siek, Vuthe
• Application Number:
  US08/409,034
• Time in Patent Office: 1,076 Days
• Field of Search: 395/500, 395/200.05, 395/308, 395/309, 364/488, 364/491, 364/578, 399/411, 358/468
• US Class Current: 358/468
• CPC Class Codes: G06F 13/128 for dedicated transfers to a network for protocol converters G06F13/387
• CPC Class Codes: H04N 1/00222 details of image data generation or reproduction, e.g. scan-to-email or network printing
• CPC Class Codes: H04N 1/00225 details of image data generation, e.g. scan-to-email or network scanners using an image reading device as a local input to a computer H04N1/00241
• CPC Class Codes: H04N 1/00233 details of image data reproduction, e.g. network printing or remote image display using an image reproducing device as a local output from a computer H04N1/00238; digital output from computer to printer unit G06F3/12
• CPC Class Codes: H04N 2201/0091 Digital copier; digital 'photocopier' H04N2201/0093 and H04N2201/0094 take precedence

Abstract

A network interface board which breaks out the functionality of a digital copier, namely scanning functionality and printing functionality, and makes that functionality available to local area network users. The functionality is made available to the local area network users in a multi-tasking environment by which different functionality is available to the different users concurrently. Specifically, a digital copier which includes a scanner part and a printer part includes an interface bus by which image data for the scanner part and the printer part is accessible. A multi-device controller is connected to the interface bus such that the multi-device controller provides interface to the scanner part and to the printer part. The multi-device controller also provides an interface to additional option boards via an MDC bus and a video bus. A network interface board is connected on one end to the MDC bus and to the video bus and is connected on the other end to a local area network. The network interface board includes a multi-tasking operating system which provides multiple network users with concurrent and independent access to each of the scanner part and the printer part.

Claims

1. In a copier having an interface bus connected to a core board, the core board being connected to plural boards via a video bus and a CPU bus, the core board controlling each of the boards connected thereto by master/slave communication routed via the CPU bus;

the improvement including a network interface board for exporting scanning and printing functionality of the copier to a computerized local area network, the network interface board comprising;

a network interface for issuing and responding to requests for network services on the local area network;

a video bus interface for interfacing to the video bus, over which video data is transmitted between the core board and the network interface board;

a CPU bus interface for interfacing to the CPU bus, over which commands, requests and access inquiries are transmitted between the core board and the network interface board to effect the master/slave communication; and

a multitasking processor for responding to local area network requests for scanning and printing services and for concurrently processing those scanning and printing requests by reading and writing video data to the video bus, the multitasking processor effecting the master/slave communication over the CPU bus so as to read and write the video data to the video bus, the master/slave communication comprising receiving an access inquiry from the core board over the CPU bus, responding to the access inquiry by issuing requests over the CPU bus to the core board to issue further commands including commands to read or write video data over the video bus, and reading or writing the video data on the video bus in response to commands received from the core board.

2. A network interface board according to claim 1, further comprising a persistent memory for storing thereon a multitasking operating system, and network communication software, a print server and a scan server, wherein said multitasking processor operates in accordance with said multitasking operating system so as to process network communications via the network communication software and so as to process requests for print services in accordance with the print server and for processing requests for scan services in accordance with the scan server.

3. A network interface board according to claim 2, wherein said persistent memory also stores at least one additional server, and wherein said multitasking processor concurrently processes requests for services of said peripheral server concurrently with other servers, and wherein said core board has connected thereto a peripheral board whose functionality is exported to the local area network via the additional peripheral server on said persistent memory.

4. A network interface board according to claim 3, wherein said network interface board communicates to said peripheral board via master/slave communication coordinated by said core board over the CPU bus.

5. A network interface board according to claim 3, wherein said additional peripheral board is comprised by a facsimile board and wherein said peripheral server is a facsimile server.

6. A network interface board according to claim 3, wherein said additional peripheral board is comprised by an image processing board and wherein said peripheral server is a image processing server.

7. A network interface board according to claim 1, wherein said network interface board includes dynamic random access memory exceeding 1 MB in capacity.

8. A network interface board according to claim 1, wherein said core board, in response to receipt of a request from the network interface board for a command to write video data, issues a command to said network interface board to write the video data onto the video bus.

9. A network interface board according to claim 8, wherein in response to receipt of a command to write video data onto the video bus, said network interface board writes video data onto the video bus.

10. A networkable digital copier which includes a scanner part and a printer part, said copier comprising:

an interface bus by which image data for the scanner part and the printer part is accessible;

a multi-device controller connected to said interface bus, said multi-device controller providing interface to the scanner part and the printer part via a core board, said multi-device controller also providing an interface to additional option boards via an MDC bus and a video bus connected to the interface bus; and

a network interface board connected on one end to the MDC bus and to the video bus and connected on another end to a local area network, the network interface board including a multi-tasking processor which provides multiple network users with concurrent and independent access to each of the scanner part and the printer part;

wherein the multitasking processor effects master/slave communication over the MDC bus so as to read and write image data to the video bus, the master/slave communication comprising receiving an access inquiry from the core board over the MDC bus, responding to the access inquiry by issuing requests over the MDC bus to the core board to issue further commands including commands to read or write image data over the video bus, and reading or writing the image data on the video bus in response to commands received from the core board.

11. A networkable digital copier according to claim 10, wherein said network interface board provides multiple network users with concurrent and independent access to each of the other option boards connected to the MDC.

12. A networkable digital copier according to claim 11, wherein said network interface board accesses the other option boards via master/slave communication routed through the MDC.

13. A networkable digital copier according to claim 10, wherein said network interface board interfaces the printer part and the scanner part via master/slave communication with the MDC over the MDC bus.

14. A network interface board according to claim 10, further comprising a persistent memory for storing thereon a multitasking operating system, and network communication software, a print server and a scan server, wherein said multitasking processor operates in accordance with said multitasking operating system so as to process network communications via the network communication stack and so as to process requests for print services in accordance with the print server and for processing requests for scan services in accordance with the scan server.

15. A network interface board according to claim 14, wherein said persistent memory also stores at least one additional server, and wherein said multitasking processor concurrently processes requests for services of said peripheral server concurrently with other servers, and wherein said core board has connected thereto a peripheral board whose functionality is exported to the local area network via the additional peripheral server on said persistent memory.

16. A network interface board according to claim 15, wherein said network interface board communicates to said peripheral board via master/slave communication coordinated by said core board.

17. A network interface board according to claim 15, wherein said additional peripheral board is comprised by a facsimile board and wherein said peripheral server is a facsimile server.

18. A network interface board according to claim 15, wherein said additional peripheral board is comprised by an image processing board and wherein said peripheral server is a image processing server.

19. A network interface board according to claim 10, wherein said network interface board includes dynamic random access memory exceeding 1 MB in capacity.

20. A method of servicing requests for network service received at a network interface board coupled between a local area network (LAN) and a copier via a core board, the requests for network service being received directly from the LAN and from the copier via the core board, said method comprising the steps of:

initializing the network interface board using configuration parameters stored in a memory on the network interface board so as to enable the network interface board to interface the copier to the LAN;

storing a plurality of network servers into a memory on the network interface board, the plurality of network servers being executed in response to received requests for network service;

receiving requests for network service; and

servicing each request for network service by executing a network server which corresponds to the request for network service, the requests for network service being serviced concurrently by a multi-tasking operating system, the requests for network service being serviced by;

issuing, in response to an access inquiry received from a core board over a CPU bus, a request to the core board over the CPU bus for further commands including commands to read or write video data over a video bus;

receiving, from the core board over the CPU bus, a command to read or write video data to the video bus; and

reading or writing the video data to the video bus in response to a command received from the core board over the CPU bus.

21. A method according to claim 20, wherein said storing step comprises storing a multi-tasking operating system, network communication software, a print server, and a scan server;

and

wherein said servicing step services requests for print services by executing the print server, and requests for scan services by executing the scan server.

22. A method according to claim 20, wherein said servicing step comprises executing the network server which corresponds to the request for network service until completion and concurrently servicing additional requests for network service.

23. A computer-readable medium for storing computer-executable process steps, said process steps to service requests for network service received at a network interface board coupled between a local area network (LAN) and a copier via a core board, the requests for network service being received directly from the LAN and from the copier via the core board, said process steps comprising:

an initializing step to configure the network interface board using configuration parameters stored in a memory on the network interface board so as to enable the network interface board to interface the copier to the LAN;

a storing step to store a plurality of network servers into a memory on the network interface board, the plurality of network servers being executed in response to received requests for network service;

a receiving step to receive requests for network service; and

a servicing step to service each request for network service by executing a network server which corresponds to the request for network service, the requests for network service being serviced concurrently by a multi-tasking operating system, the requests for network service being serviced by;

an issuing step to issue, in response to an access inquiry received from a core board over a CPU bus, a request to the core board over the CPU bus for further commands including commands to read or write video data over a video bus;

a receiving step to receive, from the core board over the CPU bus, a command to read or write video data to the video bus; and

a step to read or write the video data to the video bus in response to a command received from the core board over the CPU bus.

24. A computer-readable medium according to claim 23, wherein said storing step comprises steps to store a multi-tasking operating system, network communication software, a print server, and a scan server;

and

wherein said servicing step includes steps to service requests for print services by executing the print server, and to receive requests for scan services by executing the scan server.

25. A computer-readable medium according to claim 23, wherein said servicing step comprises steps to execute the network server which corresponds to the request for network service until completion, and steps to service concurrently additional requests for network service.

26. Computer-executable process steps stored on a computer-readable medium, said process steps to service requests for network service received at a network interface board coupled between a local area network (LAN) and a copier via a core board, the requests for network service being received directly from the LAN and from the copier via the core board, said process steps comprising:

code to configure the network interface board using configuration parameters stored in a memory on the network interface board so as to enable the network interface board to interface the copier to the LAN;

code to store a plurality of network servers into a memory on the network interface board, the plurality of network servers being executed in response to received requests for network service;

code to receive requests for network service; and

code to service each request for network service by executing a network server which corresponds to the request for network service, the requests for network service being serviced concurrently by a multi-tasking operating system, the requests for network service being serviced by;

code to issue, in response to an access inquiry received from a core board over a CPU bus, a request to the core board over the CPU bus for further commands including commands to read or write video data over a video bus;

code to receive, from the core board over the CPU bus, a command to read or write video data to the video bus; and

code to read or write the video data to the video bus in response to a command received from the core board over the CPU bus.

27. Computer executable process steps according to claim 26, wherein said storing code comprises code to store a multi-tasking operating system, network communication software, a print server, and a scan server;

and

wherein said servicing code includes code to service requests for print services by executing the print server, and to receive requests for scan services by executing the scan server.

28. Computer-executable process steps according to claim 26, wherein said servicing code comprises code to execute the network server which corresponds to the request for network service until completion, and code to service concurrently additional requests for network service.