Local area print server for requesting and storing required resource data and forwarding printer status message to selected destination

• US 5,220,674 A
• Filed: 01/18/1990
• Issued: 06/15/1993
• Est. Priority Date: 07/17/1987
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Digital Equipment Corporation (HP Inc.)
• Inventors: Morgan, William E., Cobb, Daniel S., Carlson, Alec, Bell, Gerald S.
• Primary Examiner(s): Lee, Thomas C.
• Application Number:
  US07/467,327
• Time in Patent Office: 1,244 Days
• Field of Search: 395/200, 395/275, 395/325, 395/600, 395/800, 395/101, 395/110
• US Class Current: 709/223
• CPC Class Codes: G06F 3/1203 Improving or facilitating administration, e.g. print management
• CPC Class Codes: G06F 3/1229 Printer resources management or printer maintenance, e.g. device status, power levels
• CPC Class Codes: G06F 3/126 Job scheduling, e.g. queuing, determine appropriate device
• CPC Class Codes: G06F 3/1288 in client-server-printer device configuration

Abstract

A local area print server for connection to a printer to form a printing system for servicing printing requests is disclosed. The local area print server both controls the servicing of printing requests by the printer, and in response to printer requests for resources needed to satisfy a printing request, either provides required resources, or obtains the resources from a remote component. A resource manager is provided for receiving resource requests from the printer for resources required to satisfy particular printing requests, and, in response to receiving such requests, forwards the necessary resources to the printer. There is also a status collector adapted for receiving status block messages internally generated by the printing system containing information regarding the changing state of the system and in response to receiving the messages retransmit same to one or more of the other local area print server internal modules that respond to specific printing system status changes.

Claims

1. A printer system connected to a data processing system via a local area network, the printer system comprising:

A. at least one printer, the printer performing printing operations in response to received printing requests, and formulating resource fault messages to request resources and printer status messages to signal a change in status;

B. a local area print server for receiving and managing the printing requests and supplying to the printer the printing requests and the resources required to perform requested printing operations, the print server including;

4. A printer system as in claim 1 wherein the resource data storage means additionally comprises:

i. a font data memory containing resource data;

ii. a font directory containing information indicating the location of resource data stored in the font data memory, and information indicating the location of resource data stored in the resource server; and

the resource manager means additionally determines the location of the required resource data by reading the font directory.

5. A printer system as in claim 1 wherein the network facility means additionally receives printing request messages including printing data and printing instructions, the printer status messages provided by the printer additionally include a printer ready message, and the local area print server additionally comprises:

i. server job controller means, connected to the network facility, means the status collector means, the resource manager, and the printer, for, in response to receiving a printing request message, storing the printing request message, and, in response to a printer ready message indicating the printer is available, retrieving a stored printing request message and transmitting the printing data and printing instructions associated with the stored printing request message to the printer, and

wherein if the status collector means receives a resource fault message in response to transmission of the stored printing request message to the printer, the status collector means additionally enables the resource manager means to locate and then transmit the required resource data to the printer.

8. The printer system of claim 1 wherein the local area print server further includes a server job controller for determining if and in what order the printing requests received by the network facility means are to be serviced, the server job controller consulting an internal data base which contains data relating to the printer system and the network to determine if the printing system is authorized to perform a received printing request, and to determine in what order various received printing requests are to be performed, the server job controller further indicating to the status collector means where to send the printer status messages.

9. The printer system of claim 1, wherein the resource data storage means includes:

i. a resource database which is stored within the local area print server, and

ii. a resource database which is external to the local area print server and which is locally accessible to the print server, wherein the resource manager means supplies resources from the internal resource database and the external resource database directly to the printer.

11. A local area network server as in claim 8 wherein the printer status message indicates one of several different events, and the configuration data additionally indicates different destination nodes depending upon the type of event indicated.

2. network facility means, connected to the local area network, for receiving the printing requests and resource over the network and transmitting resource request messages and the printer status messages over the network,resource data storage means for storing resources received locally or from said network facility means,resource manager means for responding to resource fault messages from the printer, the resource manager including a resource directory which contains information from which the resource manager can determine if the resources requested in the resource fault messages are available within the printing system or are available outside of the printing system, the resource manager

i. consulting the resource directory to determine if a resource is available within the printing system, and if so, supplying the resource to the printer, and otherwise

ii. consulting the resource directory to determine if the resource is available at a remote source, and if so, acquiring the resource from the remote source and supplying the resource to the printer, the resource manager sending the resource request message to the remote source over the local area network via the network facility means, and receiving the requested resource from the remote source over the network via the network facility means,

3. status collector means, for receiving the printer status messages from the printer, the status collector means determining, based on the particular printer status message received, a destination for the printer status message and forwarding the printer status message through the network facility means to the destination.

6. A printer system as in claim 3 wherein the local area print server is connected to two or more printers, and the server job controller selectively forwards a printing request message to a printer in accordance with the printer ready message most recently received from that printer.

7. A printer system as in claim 3 wherein the server job controller means additionally determines if a printing request message includes printing instructions, and the local area printer server additionally comprises:

E. a global default instruction memory containing default printing instructions to be used when a printing request message does not include printing instructions; and

F. program control means, connected to the global default instruction memory and the server job controller, for forwarding the default printing instructions when printing instructions are not supplied with a printing request message.

10. A local area print server for connecting a printer to a data processing system via a local area network, the data processing system including host nodes, an operator console node, and a service manager node, the local area print server comprising:

A. network facility means, connected to the local area network, for receiving configuration data messages from the service manager node, and for selectively transmitting a printer status message to the operator console node or one of the host nodes;

B. configuration data storage means, connected to the network facility means, for storing configuration data; and

C. status collector means, connected to the network facility means, the configuration data storage means and the printer, for receiving the printer status message from the printer, for retrieving from the configuration data storage means configuration data which indicates which of the host nodes or operator console node, if any, is a destination node for the printer status message, and for forwarding the printer status message through the network facility means to the destination node indicated by the configuration data.

12. A local area print server for connecting a printer to a data processing system via a local area network, the data processing system including host nodes, an operator console, a service manager node, and a resource server node, the local area print server comprising:

A. network facility means, connected to the local area network, for receiving printing request messages including printing data and printing instructions from the host nodes, for transmitting resource request messages to the resource server node and receiving printer resource data in response thereto, for receiving configuration data messages from the service manager node and for selectively transmitting a printer status message to the operator console node or one of the host nodes;

B. configuration data storage means, connected to the network facility means, for storing configuration data;

C. status collector means, connected to the network facility means, the configuration data storage means and the printer, for receiving printer status messages, the printer status messages including printer resource fault messages, for reading from the configuration data storage means configuration data which indicates which of the host nodes or operator console node, if any, is a destination node for receiving a particular printer status message, and for forwarding the printer status message through the network facility means to the destination node indicated by the configuration data;

D. resource data storage means, connected to the network facility means, for storing printer resource data received from the resource server node;

E. resource manager means, connected to the network facility means, the printer, the resource data storage means and the status collector means, for determining, upon receipt of a printer resource fault message, whether required resource data is stored in the resource data storage means and, if so, transmitting the required resource data from the resource data storage means to the printer and, if not, forwarding a resource request message to the network facility means; and

F. server job controller means, connected to the network facility means, the status collector means, the resource manager means and the printer, for, in response to receiving a printing request message, storing the printing request message and, in response to a printer status message indicating the printer is available, retrieving a stored printing request message and transmitting the printing data and printing instructions associated with the stored printing request message to the printer,

and, wherein if the status collector means receives a resource fault message in response to transmission of the stored printing request message to the printer by the server job controller means, the status collector means additionally enables the resource manager means to locate and transmit the required resource data to the printer.