# Patent

## Title
System for maintaining imaging device accounting data

## Abstract

A system is provided for maintaining imaging device (IDev) accounting data. A primary accounting server (PAS) sends messages to an imaging device (IDev) and to a lightweight accounting back-up server (LABS). The PAS receives messages from the IDev and updates a primary IDev activity log (PIAL). The IDev receives messages from the Primary server and a LABS in communication with the IDev. The LABS sends and receives messages and data from the IDev and from the PAS. The IDev sends a record of its activity to the PAS when the PAS is available, and the PAS maintains a primary IDev activity log (PIAL). The IDev sends a record of its activity to the LABS when the PAS is not available and the LABs maintains a temporary IDev activity log (TIAL). The PAS updates the PIAL with the TIAL data after a period of unavailability.

## Background
RELATED REFERENCES
This application is a Divisional of U.S. patent application Ser. No. 11/192,865, entitled “Methods and Systems for Imaging Device Accounting Data Maintenance”, filed Jul. 29, 2005 now U.S. Pat. No. 8,023,130, which is a continuation-in-part of U.S. patent application Ser. No. 10/962,248, entitled “Methods and Systems for Imaging Device Remote Application Interaction, filed on Oct. 8, 2004 now U.S. Pat. No. 8,018,610; U.S. patent application Ser. No. 11/192,865 is also a continuation-in-part of U.S. patent application Ser. No. 10/961,793, entitled “Methods and Systems for Imaging Device Remote Form Management, filed on Oct. 8, 2004 now U.S. Pat. No. 8,035,831; U.S. patent application Ser. No. 11/192,865 is also a continuation-in-part of U.S. patent application Ser. No. 10/961,911, entitled “Methods and Systems for Imaging Device Remote Location Functions, filed on Oct. 8, 2004; U.S. patent application Ser. No. 11/192,865 is also a continuation-in-part of U.S. patent application Ser. No. 10/961,594, entitled “Methods and Systems for Imaging Device Remote document Management, filed on Oct. 8, 2004; and U.S. patent application Ser. No. 11/192,865 is also a continuation-in-part of U.S. patent application Ser. No. 10/962,103, entitled “Methods and Systems for Imaging Device Document Translation, filed on Oct. 8, 2004 now U.S. Pat. No. 7,969,596; U.S. patent application Ser. No. 11/192,865 also claims the benefit of U.S. Provisional Patent Application No. 60/707,066, entitled “Methods and Systems for Imaging Device Applications,” filed Jul. 28, 2005.


FIELD OF THE INVENTION
Embodiments of the present invention comprise methods and systems for preserving imaging device (IDev) accounting data when an imaging system's main accounting server becomes unavailable.
BACKGROUND
Imaging devices such as printers, copiers, scanners and fax machines can have a wide array of functions and capabilities to fit specific uses or combinations of uses. Imaging, devices often take the form of a multi-function peripheral device (MFP) that combines the functions of two or more of the traditionally separated imaging devices. An MFP may combine any number of imaging devices, but typically comprises the functions of a printer, scanner, copier and fax machine.
Some imaging devices may contain computing resources for data storage and processing such as processors, hard disk drives, memory and other devices. As imaging devices add more features and functions, they become more costly and complex.
More complex imaging devices and MFPs may comprise network connectivity to provide communication with other computing devices, such as personal computers, other
imaging devices, network servers and other apparatus. This connectivity allows the imaging device to utilize off-board resources that are available on a connected network.
Imaging devices typically have a user input panel with an array of buttons, knobs and other user input devices. Some devices also have a display panel, which can be for display only or can be a touch panel display that enables user input directly on the display.
Devices with touch panel displays or displays with buttons arranged in cooperation with the display can display menu data that may be selected by user input. This menu data is typically driven by an on-board server module within the imaging device.
BRIEF SUMMARY OF THE INVENTION
Embodiments of the present invention comprise methods and system's for the continuous capture of accounting data when an imaging system's main accounting server becomes unavailable.
The foregoing and other objectives, features, and advantages of the invention will be more readily understood upon consideration of the following detailed description of the invention taken in conjunction with the accompanying drawings.



BRIEF DESCRIPTION OF THE SEVERAL DRAWINGS
FIG. 1 is a diagram of an embodiment of the present invention comprising an imaging device in connection with a remote computing device;
FIG. 2 is an image of an exemplary user interface for an imaging device;
FIG. 3 shows an exemplary imaging device;
FIG. 4 is a chart depicting steps of an imaging device method;
FIG. 5 is a chart depicting steps of an imaging device method using a markup language;
FIG. 6 shows an exemplary, remote computing device embodiment;
FIG. 7 is a diagram showing components of an exemplary remote computing device;
FIG. 8 is a chart showing steps of a remote computing device method;
FIG. 9 is a chart showing steps of a remote computing device method using a markup language;
FIG. 10 is a diagram showing a system comprising multiple imaging devices in connection with a remote computing device;
FIG. 11 is a chart showing steps of a method comprising RCD processing of user input data;
FIG. 12 is a diagram showing components of some embodiments comprising linked resources;
FIG. 13A is a diagram showing an exemplary system comprising IDevs, computing devices, a primary accounting server, and LABSs;
FIG. 13B is a diagram showing an exemplary system comprising an IDev, a computing device comprising a LABS and a primary accounting server;
FIG. 14A is a chart showing the steps of a method of some embodiments comprising maintenance of IDev activity data in the event of a primary accounting server failure;
FIG. 14B is a chart showing the steps of a method of some embodiments comprising recovering temporary IDev activity data after a primary accounting server is put back into service;
FIG. 15 is a chart showing the steps of a method of some embodiments comprising finding a LABS when a primary accounting server fails;
FIG. 16 is a chart showing the steps of a method of some embodiments comprising finding a new LABS when a current LABS fails;
FIG. 17 is a chart showing the steps of a method of some embodiments comprising recovering temporary IDev activity data after a primary accounting server is put back into service; and
FIG. 18 is a chart showing the steps of a method of some embodiments comprising recovering temporary IDev activity data after a primary accounting server is put back into service.



DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
Embodiments of the present invention will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The figures listed above are expressly incorporated as part of this detailed description.
It will be readily understood that the components of the present invention, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the methods and systems of the present invention is not intended to limit the scope of the invention but it is merely representative of the presently preferred embodiments of the invention.
Elements of embodiments of the present invention may be embodied in hardware, firmware and/or software. While exemplary embodiments revealed herein may only describe one of these forms, it is to be understood that one skilled in the art would be able to effectuate these elements in any of these forms while resting within the scope of the present invention.
Embodiments of the present invention comprise interfaces and architecture that integrate imaging devices with remote computing device applications and environments to provide solutions that may not be possible solely with an imaging device alone. Some embodiments comprise an infrastructure and set of interfaces that allow applications on a network to programmatically control imaging device functions and interact with a user through an imaging device input panel. Software functions that are not practical within the imaging device can be performed on the server but are accessible from the imaging device.
For the purposes of this specification and claims, an imaging device (IDev) may be described as a device that performs an imaging function. Imaging functions comprise scanning, printing, copying, image transmission (sending and receiving), image conversion and other functions. Exemplary imaging devices comprise printers, copiers, facsimile machines, scanners, computing devices that transmit, convert or process images and other devices. An IDev may also perform multiple imaging functions. For example, and not by way of limitation, a multi-function peripheral device (MET), which typically has the capability to perform a plurality of functions comprising a printer, scanner, copier and/or a facsimile machine or image transmitter/receiver, is a type of imaging device. Other MFP imaging devices may comprise other combinations of functions and still qualify as an IDev.
For the purposes of this specification and claims, a remote computing device (RCD) is a device capable of processing data and communicating with other devices through a communications link. An RCD is a remote device because it requires a communications link, such as a network connection, a telephone line, a serial cable or some other wired or wireless link to communicate with other devices such as an imaging device. Some exemplary RCDs are network servers, networked computers and other processing and storage devices that have communications links.
Some embodiments of the present invention may be described with reference to FIGS. 1 & 2. These embodiments comprise an imaging device (IDev) 4 that may be a multi-function peripheral device (MFP) or a single function device. The imaging device 4 further comprises a user interface (UI) panel 2, which may comprise input buttons 14 and a display device 12 or may comprise a touch panel system with or without buttons 14. User input and display may also be performed through a separate UI device 8, which may be connected to the imaging device 4 by a communication link 12, such as a USB connection, a network cable, a wireless connection or some other communications link. UI device 8 may comprise an input device, such as a keyboard or buttons as well as a display device, which may also be a touch screen panel. UI device 8 may also comprise an interface for transfer of instructions that are input to the device 8 from a remote input device. This form of UI device 8 may comprise memory sticks, USB memory cards and other storage devices that may be configured to store input for transfer to an imaging device.
These embodiments further comprise a remote computing device (RCD) 6 that is linked to the imaging device 4 via a communications link 10, such as a network connection. This network connection may be a typical wired connection or a wireless link.
Embodiments of the present invention may provide menu data from the RCD 6 to the imaging device UI panel 2 or remote panel 8 via the network connection 10. Once this menu data is fed to the imaging device 4, an UI panel 2, 8 on the imaging device 4 may be used to interact with applications that run on the remote computing device 6. User input received from UI panels 2, 8 may be returned directly to the remote computing device 6.
A Web Service is a software application identified by a Uniform Resource Identifier (URI), whose interfaces and binding are capable of being defined, described and discovered by Extensible Markup Language (XML) artifacts and supports direct interactions with other software applications using XML based messages via Internet-based protocols.
An application on the remote computing device 6 may use one or more Web Services to control various features in the imaging device 4, such as enabling, disabling or setting device values or controlling device functions.
Embodiments of the present invention allow network applications running on remote computing devices to interact with the user of the imaging device through the imaging device I/O panel. These embodiments allow imaging device user interface (UI) control (i.e., touch panel, button/display) by applications. Some embodiments may also integrate custom display screens or menus with the native imaging device UI. Embodiments may hand off control of imaging device functions between standard operation modes performed on the imaging device in response to user input to an imaging device UI and open systems modes that utilize network resources, such as applications on RCDs, through user input at the imaging device UI.
Embodiments of the present invention comprise network-based applications that have full control over the imaging device UI to display text and graphics in any format. In these embodiments, the application can programmatically display buttons, textboxes, graphics, etc. in any layout desired.
In some embodiments, the UI layout is easy to program using a standard language, such as a markup language. These languages comprise Hypertext Markup Language (HTML), Extensible Markup Language (XML), Wireless Markup Language (WML), Extensible Hypertext Markup Language (XHTML) and other languages.
In some embodiments of the present invention a remote computing device application or server application is able to request a keyboard UI to be displayed on the imaging device display 12, 8. In some embodiments, this functionality is available on the imaging device and does not need to be recreated by remote computing device applications. In some embodiments, the remote computing device may define the keyboard prompt and default values. These embodiments may comprise a remote computing device that is able to rename imaging device UI buttons, such as the OK and Cancel buttons as well as define additional buttons.
In some embodiments, menu templates may be served to the imaging device UI by the imaging device itself 4 or from a remote computing device 6.
External Authorization Application
Some embodiments of the present invention may comprise a remote computing device application that is registered as the External Authorization server. The External Authorization application may control access to the imaging device and may have top-level control of the UI. UI control may be given to this application in the same manner that control is given to an internal auditor.
In these embodiments, when an imaging device system boots, it checks to see if an External Authorization application is registered. If so, the imaging device is placed in disabled mode and the application is contacted to take control of the UI. If the External Authorization server is not available, an error message may be displayed and the device may remain disabled. The imaging device may periodically try to contact the External Authorization server until it is available, Table 1 below describes what entity has control of the UI, in an exemplary embodiment, when the device is in a disabled state.







TABLE 1







UI Control in Disabled State









Button Press
UI Control
Indicator Lights





Device boots
External Application
None


Document Filing
External Application
None


Image Send
External Application
None


Copy
External Application
None


Job Status
Device - standard Job Status
Job Status



screens


Custom Settings
Device - standard Custom Settings
N/A



screens


OS Mode
Not available when device is



disabled









Remote Computing Device Applications

In embodiments of the present invention, access to the custom UI panels of imaging devices may vary from application to application. Some solutions, such as Document Management integration, may wish to leverage the native Image Send screens, but display some custom UI's to gather additional information about a scan job. Other solutions, like custom printing applications, may be accessed from a separate mode than the native functions.
In order to accommodate the diversified needs of these solutions applications, embodiments may support multiple integration points for UI control. These integration points are based on a user action (“trigger”) for which applications may register. In some embodiments, applications may be registered with target devices so that the device knows that when “trigger A” occurs on the front panel to contact “remote computing device B” for instructions. In exemplary embodiments, applications may be integrated with an imaging device at any of several “trigger” points.
Remote computing devices may be registered to a specific function and contacted when that function's hardware key is pressed (e.g. Image Send) on the imaging device UI. Any UI information provided by the remote computing device may be displayed instead of the standard function screens native to the imaging device. This trigger may be used for applications that wish to replace the existing functions with completely custom UI's, such as an alternative scan solution or a specialized display, such as a “Section 508” compatible screen or other specialized-need interface that may have large buttons or other accommodations.
In some embodiments, each function on the imaging device may have a menu on the touch screen that remote computing devices, such as servers, can register. This enables solutions applications to provide custom content and still use some of the standard functionality provided by the imaging device. When a button assigned to a custom application is selected, a menu will be displayed with the solutions registered to that function. Users may select the desired solution and the remote computing device will be contacted for instructions.
In some embodiments, a stand-alone RCD mode that provides remote computing device application access can be accessed from the job queue portion of the UI that is displayed on every screen. This trigger point may be used for applications that do not fit within one of the standard device functions, such as custom printing solutions on an imaging device. When the RCD menu is selected, a menu will be displayed with the solutions applications registered to the generic RCD mode. Users will select the desired solution and the remote computing device will be contacted for instructions.
Hardware Key Interaction
In some embodiments of the present invention, when an imaging device is enabled, additional hardware keys may be used to manage the device. Hardware key assignments for an exemplary embodiment are shown in table 2.







TABLE 2







Exemplary Hardware Key Assignments









Button Press
Standard IDev Mode
RCD Mode





Mode keys (Copy,
Clear current job
Clear current job settings,


Doc Filing, Image
settings, move to
move to target screen


Send) and Custom
target screen


Settings key


Job Status key
Move to Job Status,
Move to Job Status,



maintain current
maintain current settings &



settings & UI
UI location



location


Clear (C)
Clears settings
Sends clear event to




external application


Clear All (CA)
Clears settings, cancels
Cancels job and returns to



job, and returns to
default IDev screen



default IDev screen
(notification sent to external




application)




**When External




Authorization is controlling




the UI, only notification is




sent


Start
Initiates scan function
Initiates scan function


Number keys
Input for copy count or
Not used



fax numbers


*
Logs user out (disable
Logs user out (disable



device and contact
device and contact External



External Authorization
Authorization for screens)



for screens)









In some embodiments, in addition to the * key for logout, a timeout period may be implemented. Some embodiments also comprise an auto clear setting that can be configured for a given period of time, such as 10 to 240 seconds (or disabled). In these embodiments, when there is no activity for the time configured in auto clear, the device may automatically return to disabled mode and attempt to contact a remote computing device to retake control of the UI.
Error & Jam Notifications
Depending on a particular solution, a remote computing device application may have full or only partial control of the imaging device UI and a particular imaging job. In some embodiments, partial control may include cases where a remote computing device is monitoring clicks, but native modes are responsible for the UI interaction and controlling the job. Partial control may also include cases where the remote computing device application is integrated with a native mode (UI trigger=function custom menu). In these embodiments, the imaging device may handle all error and jam notifications with only a notification sent to the relevant remote computing device application.
For some embodiments, in cases where the remote computing device application has full control over the UI and the job, error and jam notifications may be handled differently depending on the type of error. For recoverable errors, a notification may be sent to the remote computing device application and the application may be responsible for displaying messages and resolving the error. For non-recoverable errors, the imaging device and RCD mode may interact to gracefully handle the error condition (e.g. provide user with instructions for clearing jam).
Control Handoffs
In some embodiments, at different points throughout an imaging job, several applications may need control over an imaging device including, but not limited to, an External Authorization application, a standard RCD application, an imaging device native mode and other applications. The following section describes, for an exemplary embodiment, the various steps in an exemplary job, the entities that may have control during each step, and what type of control may be allowed.
Step 1: User provides credentials to access the device at the device UI. This step may be controlled by a remote computing device, such as an External Authorization application or by Internal Accounting (native mode) in the imaging device itself. At the end of this step, the device is enabled. The External Authorization application may also specify default parameters or disable specific job parameters (e.g. default file format is PDF, but user may change; color mode is set to B/W and user may not change).
Step 2: User sets parameters for the job using one of the native imaging device modes or a standard RCD application. At the end of this step the user makes an input to initiate the job. When the input is made, an optional notification may be sent to the standard RCD application, which can then change job parameters if desired. An e-mail application is one example of an application that may request notification when the user input is made. A user may use native Image Send screens or other input to select scan options and choose e-mail recipients. A user may then select a custom application button and choose the scan-to-e-mail option from the menu. The e-mail application may then display custom screens for the user to set permissions for the file. Once a user places the original document(s) on the scanner and initiates the process, the e-mail application may capture the destination parameters set by the user and change the target destination to the e-mail application FTP server. The e-mail application may then receive the file, apply the appropriate permissions, and send to the e-mail recipients selected by the user. A remote computing device application may also want to retake control of the UI at this point, if, as in some embodiments, the application generates thumbnails of the scanned images and displays them to the user for verification.
Step 3: Once the job is initiated, the imaging device is responsible for scanning or RIPing the job and spooling it to the HDD. If the imaging device is configured to authorize jobs with an external authorization application, it may send a click report to the application and wait for instructions. The external authorization application may enable the job for sending/printing, cancel the job, or change job parameters (and then enable). As an example, a rules-based printing application may wish to change job parameters after it receives a click report. Some rules-based printing applications support rules-based printing and scanning that can limit what each user is allowed to do based on the time of day, the destination, or many other parameters. For example, only users in the marketing group may be able to scan high-quality color images. If a user from another group selects color and 600 dpi, a rules-based application may change the parameters to color and 200 dpi. At the end of this step the job should either be authorized or canceled.
Step 4: In some embodiments, this may be an optional step, where the standard RCD application in step 2 may have specified the destination as a HDD for temporary storage. This step may also be used, in some embodiments, by a Java application running on the imaging device. For example, a government office may have a custom encryption application running on the device that takes the scanned document, encrypts it, and then requests the imaging device to send it to the target destination selected by the user in step 2. In some embodiments, it may be beneficial to send a notification to the external authorization application after this step—because the imaging device does not know how long the file will be on the HDD or what the application is going to do with it and after the send/print step.
Step 5: In the final step, the file is actually output. In typical embodiments, the file is either sent over the network or printed locally. At the end of this step, a notification that the job was successfully completed should be sent to the external authorization application and optionally, to the standard RCD application.
Device Control and Management API's
The API's may be used to allow a remote computing device application to control access to an imaging device for vend applications and to manage the device from a remote location.
Device Control and Vend API
In some embodiments of the present invention, a Device Control and Vend API allows applications to enable and disable access to the device and track click counts. The Device Control and Vend API may provide an RCD with the following controls:
Enable/disable device of function—this may allow an RCD to enable or disable access to the device as a whole or by function to enforce individual user privileges. In some exemplary embodiments, the functions listed in Table 3 may be selectively enabled or disabled by an application.







TABLE 3







Device Functions








Enable/Disable
Description





Copy
Copy function



(Copy button)


Image Send
Scan and fax function, plus send from Doc Filing



(Image Send button)


Document Filing
All access to Document Filing functions



(Document Filing button)


Print
Network prints, pull print from front panel, and



print from Document Filing



(No button control)









Report clicks used at the end of a successful job, the clicks used may be reported back to an RCD including:







TABLE 4







Job and Page Characteristics

















Fax
PC-
E-mail/

Scan


Item
Copy
Print
Send
Fax
FTP
Broadcast
to HD










JOB Characteristics














Job Mode
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Broadcast
No
No
Yes
Yes
Yes
Yes
No


Manage No.


User Name
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Address
No
No
Yes
Yes
Yes
#
No


Start Time
Yes
Yes
Yes
Yes
Yes
Yes
Yes


End Time
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Total Page
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Result
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Error Cause
No
No
Yes
Yes
Yes
Yes
No


Doc Filing
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Save Mode
*1
*1
*1
*1
*1
*1
*1


File Name
*1
Yes
*1
Yes
Yes
*1
Yes


File Size
Yes
Yes
*1
*1
*1
*1
Yes


Resolution
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Special
Yes
Yes
Yes
No
Yes
Yes
Yes


Finishing
Yes
Yes
No
No
No
No
No


File Format
No
No
No
No
Yes
Yes
No


Compression
No
No
No
No
Yes
Yes
No







PAGE Characteristics














Copy
Yes
Yes
Yes
Yes
Yes
#
Yes


Paper Size
Yes
Yes
Yes
Yes
Yes
Yes
Yes


Simplex/
Yes
Yes
Yes
Yes
Yes
Yes
Yes


duplex


Paper Type
Yes
Yes
Yes
Yes
No
No
Yes


Page
Yes
Yes
Yes
Yes
Yes
Yes
Yes





*1 - Yes when Document Filing is used






Debit mode—in these embodiments, when an application enables the device it may specify if the current job requires authorization. If so, the job will be spooled to memory and click information (e.g., as defined in Table 4) will be sent to an RCD. An RCD will then notify the device if the job should be deleted or output/sent. At this point, the application also has the option of changing job parameters. If the application does not require authorization, the job will continue as normal and a click report will be sent at the end of the job.
Print job accounting—in these embodiments, an RCD may wish to monitor print jobs along with walk-up functions. For print job accounting, an IDev may monitor all incoming print jobs and send accounting data in the PJL header to an RCD for verification before printing the job. The RCD will evaluate the accounting data (or lack thereof) and inform the IDev to continue with or cancel the job.
Report on unidentified jobs—in these embodiments, an RCD may also wish to monitor print jobs that it cannot associate to a specific user, such as device reports and incoming fax jobs. The RCD can register to receive click counts for all unidentified jobs, so that it may bill them to a general account.
Device Management API
In some embodiments of the present invention, a Device Management API allows a network application to remotely setup and manage the imaging device. In exemplary embodiments, the Device Management API may provide an RCD with the following controls:

    
    
        Device status—an RCD may request the current status of the device. This is the same status information as reported on the embedded web pages.
        Device configuration—an RCD can retrieve a list of installed options supported by the device,
        Web Page settings—an RCD application can retrieve and set any of the values that are configurable on the embedded web pages.
        Key Operator Programs—an RCD application can retrieve and set any of the values that are configurable in Key Operator Programs, including software keys.
        Custom Settings—an RCD application can retrieve and set any of the values that are configurable in Custom Settings.
        Job Status—an RCD application can retrieve the current job queue and history information and reprioritize or delete jobs in the queue.
        Click counts—an RCD application can retrieve device total counts and clicks for each function by account code.
        Data Security settings—an RCD application may retrieve the status information on the DSK (e.g. last erase) and initiate data clear functions.
        RED data—an RCD can retrieve all data typically sent in a RED message.
        Remote reboot—an RCD can initiate a reboot of the imaging device.
    
    


The above groupings are provided only as an exemplary embodiment detailing which settings should be included. In some embodiments, actual API's should be grouped by functional areas since there may be overlap between Key Operator settings and web page settings.
Internal Accounting API
In some embodiments, an Internal Accounting API may allow a remote computing device application to configure internal accounting and report click counts. In some exemplary embodiments an Internal Accounting API may include:

    
    
        Set Auditing Options—an RCD may set auditing options including which modes auditing is enabled for, “account number security”, and “cancel jobs of invalid accounts.”
        Manage Account Codes—an RCD can add, edit, or delete account codes
        Account Limits—an RCD application can specify a maximum number of clicks by function for individual account codes or for all account codes
        Account Reset—an RCD application can reset the click count for an individual account or for all accounts
        Retrieve Clicks—an RCD can retrieve the number of clicks by function for each account code

Font and Form Management API

    
    


Some embodiments of the present invention may comprise a Font and Form Management API, which allows an RCD application to remotely download and manage fonts and forms in mass-storage. In some exemplary embodiments, a Font and Form Management API may provide a remote computing device with the following controls:

    
    
        Mass storage control—an RCD application can retrieve mass storage status information including storage capacity, space available, and write-protect mode plus modify write-protect status.
        Resource list—an RCD application can retrieve a list of stored fonts and forms including font or macro ID, font number, font/form name, escape sequence, and file size.
        Download resource—an RCD application can download PCL fonts, Pa, macros, and PS fonts and forms. Any special processing that is performed when a resource is downloaded via the web pages will also be performed when the resource is downloaded via Open Systems.
        Delete resource—an RCD application can delete any resource stored in mass storage,
        Upload resources—an RCD application can upload an individual or all resources. On devices where effective memory management is unavailable, a server application can use this function to “defrag” mass storage.
        Font/macro ID's—an RCD application can assign or modify the ID's assigned to PGL fonts and macros.

Firmware Management API

    
    


In some embodiments of the present invention, a Firmware Management API may allow a remote computing device or network application to remotely download and manage the imaging device firmware. In some exemplary embodiments, a Firmware Management API may provide a remote computing device (e.g., a server) with the following controls:

    
    
        Firmware versions—an RCD application can retrieve the current firmware version numbers.
        Service mode—an RCD application can place the MEP in service mode to lockout other jobs that will interfere with firmware upgrade. Upon receiving a service mode request, the IDev will stop accepting incoming jobs, complete all jobs in the queue, and then notify the server that it is in service mode.
        Update firmware—an RCD can download an updated firmware version to the device. If a reboot is necessary, the IDev will perform it automatically when download is complete.
        Download status—the IDev will send a status notification (success/error) to an RCD after firmware download.
        Revert to previous version—if firmware update is not successful, the application can request the IDev to revert to the previous firmware version.
    
    


DEVICE FUNCTION API'S
in some embodiments of the present invention, device function API's allow a remote computing device application to use existing imaging device functionality to provide new custom solutions.
Image Send API
In some embodiments, an Image Send API may provide the remote computing device application with the following controls:

    
    
        Image Send Parameters—a remote computing device application can get and set values for the following scan and fax parameters:
        
            COLOR OR B/W
            IMAGE MODE—TEXT, TEXT/PHOTO, PHOTO; EXPOSURE LEVEL 
            RESOLUTION 
            FILE FORMAT—FILE TYPE, COMPRESSION, AND PAGES PER FILE 
            ORIGINAL—ORIGINAL SIZE, SIMPLEX/DUPLEX, ROTATE, AND JOB BUILD 
            FILENAME 
            SUBJECT 
            MESSAGE 
            SENDER 
            SCHEDULE SEND TIME 
            PAGE DIVISION (BOOK SCANNING)
            COVER PAGE 
            TRANSMISSION MESSAGE (CONFIDENTIAL, URGENT, ETC.)
            THIN PAPER SCANNING 
            DESTINATION 
            DOCUMENT FILING 
        
        
        Initiate Scan—the remote computing device application can initiate the scan function (same as user pressing start button).
    
    


In some embodiments, a remote computing device can change the default values on the imaging device or the values for the current job. For the current job, the remote computing device may also specify if scan parameters may be modified by the user or not. If one remote computing device application (e.g. Access Control) specifies that a parameter cannot be changed and then a second application (e.g. Document Management) tries to set the parameter, a notification may be sent to the second application and the setting will not be changed.
Print API
In some embodiments, print jobs may be submitted by remote computing device applications using standard printing channels. In some exemplary embodiments, a Print API may provide a remote computing device with the following additional control:

    
    
        PJL sniffing—an RCD application can register with the IDev to be contacted for instructions when a specific PJL command is found in a print job. The RCD can then instruct the IDev to replace the command, cancel the job, or continue printing. This interface may be used in applications like accounting and other-brand compatibility.

Copy API

    
    


In some embodiments of the present invention, a Copy API may provide a remote computing device with the following exemplary controls:

    
    
        Copy Parameters—an RCD application can get and set values for the following copy parameters:
        
            COLOR OR B/W
            EXPOSURE—TEXT, TEXT/PHOTO, PHOTO, SUPER PHOTO; EXPOSURE LEVEL 
            PAPER SELECT (BY TRAY)
            COPY RATIO 
            2-SIDED COPY—1TO1, 1TO2, 2TO2, 2TO1; BINDING EDGE 
            OUTPUT—OUTPUT TRAY, SORT, STAPLE, GROUP, OFFSET 
            ORIGINAL SIZE 
            SPECIAL FUNCTIONS—MARGIN SHIFT, ERASE, PAMPHLET, ETC. 
            DOCUMENT FILING 
        
        
        Initiate Copy—an RCD application can initiate the copy function (same as user pressing start button).
    
    


In some embodiments, a remote computing device can change the default values on the imaging device or the values for the current job. For the current job, the remote computing device may also specify if copy parameters may be modified by the user or not.
Document Filing API
In some embodiments of the present invention, a Document Filing API may provide a remote computing device with the following exemplar), controls:

    
    
        Backup/restore—the remote computing device application can import and export a batch file with all Document Filing data. In some embodiments, this package will be in a proprietary format since it contains documents that are password-protected and should not be accessed individually this is typically for restore in case of failure or cloning to other devices.
        File/folder list—the remote computing device application can retrieve, modify, and create new files and folders to be stored on the IDev (also covered in device management).
        Download file—the remote computing device can download a new file to the Document Filing systems and specify folder, filename, username, and password,
        User list—the remote computing device application can retrieve, modify, and create new users to be stored on the IDev (also covered in device management).
        HDD Status—the remote computing device application can retrieve the current HDD status including the % allocated to the main folder, quick folder, and custom folders and the % remaining.
        Doc Filing Parameters—the remote computing device application can get and set values for storing a file to Doc Filing including:
        
            EXPOSURE 
            RESOLUTION 
            ORIGINAL—SIZE, SIMPLEX/DUPLEX 
            FILE INFORMATION—USERNAME, FILENAME, FOLDER, CONFIDENTIAL, PASSWORD 
            SPECIAL MODES—ERASE, DUAL PAGE COPY, 2IN1, JOB BUILD, CARD SHOT 
        
        
        Initiate Print—the remote computing device application can select a stored file and initiate a print including the following parameters:
        
            PAPER SIZE/SOURCE 
            OUTPUT—SORT/GROUP, OUTPUT TRAY, STAPLE, PUNCH, OFFSET 
            SIMPLEX/DUPLEX (TABLET/BOOKLET)
            TANDEM PRINT 
            NUMBER OF COPIES 
            DELETE OR STORE AFTER PRINTING 
        
        
        Initiate Send—the remote computing device application can select a stored file and initiate a send including the following parameters:
        
            RESOLUTION 
            FILE FORMAT 
            DESTINATION 
            TIMER 
            SENDER 
            FILENAME 
            SUBJECT 
            MESSAGE 
        
        
    
    


SECURITY
Allowing external applications to control an imaging device opens up the imaging device to new security vulnerabilities. In embodiments of the present invention that provide some security measures, the following exemplary items are security concerns that may be addressed by the remote computing device interface.
Access to remote computing device interfaces may be limited to valid applications. Embodiments provide extensive access and control of the imaging device, which poses a significant security risk. The interface of these embodiments may be protected from access by attackers, while maintaining ease of setup and use for valid solutions.
Confidential data (user credentials and job data) may be protected during network transfer. User credentials and job data may be secured during network transfer to ensure that it cannot be stolen, an intruder cannot monitor device activity, and a man-in-the-middle attack cannot change messages. Imaging devices may support Secure Sockets Layer (SSL) and other connections to ensure data is safe white being communicated between the imaging device and remote computing device applications.
Administrators may have the ability to lock-down imaging device access. For users with strict security policies, administrators may have the ability to disable access by remote computing devices or limit access to specific applications. Administrators may have an option to register the limited applications that they wish to access the imaging device interfaces.
Remote computing device applications may ensure the imaging device is not being “spoofed,” The remote computing device may be able to authenticate an imaging device that it is contract with it to ensure an intruder cannot imitate the imaging device to collect network configuration and password information, monitor file/folder structures of a document management system, or spoof security settings and DSK status of the imaging device.
A remote computing device may ensure that the server is not being “spoofed.” The imaging device must be able to authenticate all remote computing devices that it is in contact with to ensure that an intruder is not spoofing the remote computing device's IP address. By pretending to be the remote computing device, an intruder could steal user credentials, redirect scanned documents, change device settings or firmware, or bring down the access control system (either to provide access to unauthorized users or initiate a denial of service attack for valid users).
Access control/vend applications may not be compromised when a remote computing device is unavailable. When the remote computing device is unavailable, it may not be acceptable to provide open access to the device. If the remote computing device is unavailable at startup or becomes unavailable at anytime (e.g. someone disconnects network cable), the imaging device may immediately be disabled and an error message displayed.
An administrator may be able to adjust a security level based on company and application requirements. Security requirements can have a large impact on the time it takes to develop a remote computing device application and the resources required to implement the solution. Users using some embodiments may range from a small business with one imaging device, no IT staff, and a simple scan or print application to a large government office using access control and audit trails to track all device activity. The security measures used to protect imaging device interfaces may be adjustable by the administrator to match the target environment.
The imaging device and remote computing device applications may be able to hand-off user credentials. Users may be prompted to login at multiple points throughout a job. For example, an access control application or accounting application may control total device access, the imaging device may have user authentication enabled for Image Send, and a document management application may require user login before showing a folder list. In many environments, all of these applications will use a common user database. In some embodiments, it is, therefore, desirable for the applications to pass user credentials to each other, so that each one does not have to repeat the authentication process.
Some embodiments of the present invention may be described with reference to FIG. 3. These embodiments comprise an imaging device only, which is configured to interact with a remote computing device, such as a server through a communications link. The imaging device 30 comprises a user interface 32, which comprises a user input device 34, such as a keypad, one or more buttons, knobs or switches or a touch-screen panel and a display 36, which may comprise user input device 34 in the form of a touch-screen panel.
Imaging device 30 will typically be capable of performing one or more imaging functions including, but not limited to, scanning, printing, copying, facsimile transmission (sending and receiving and others.
These embodiments further comprise a communications link 38, which may be a wired connection (as shown in FIG. 3) comprising a network cable, a Universal Serial Bus (USB) cable, a serial cable, a parallel cable, a power line communication connection such as a HomePlug connection or other wired connections. Alternatively, the communications link 38 may comprise a wireless connection, such as an IEEE 802.11(b) compliant connection, a Bluetooth connection, an Infrared Data Association (IrDA) connection or some other wireless connection.
The operation of some imaging device embodiments may be explained with reference to FIG. 4. In these embodiments, menu data is received 40 from a remote computing device (not shown in FIG. 3), which is connected to the imaging device 30 via the communication link 38 through a wired or wireless connection. This menu data is then displayed 42 on the imaging device user interface display 36. This display of remote menu data is intended to prompt a user to make an input on the user interface input device 34.
Imaging devices of these embodiments are further configured to accept input from a user in response to a display of remote menu data and communicate 44 that user input to a remote computing device. In some embodiments, this user input data will be processed by a remote computing device. This may comprise running an application on the remote computing device. This processing may also comprise accessing and communicating data that is stored on the remote computing device.
The imaging devices of these embodiments are further configured to receive 46 data resulting from processing the user input data. This may comprise data generated by an application running on the remote computing device in response to the user input. The imaging device may also receive data that was stored on a remote computing device, such as a file server, in response to processing the user input.
Once the imaging device 30 has received 46 the processed data, the imaging device 30 may perform 48 a native function in response to the data or using the data. For example, and not be way of limitation, the imaging device 30 may print a document that was stored on the remote computing device and modified on the remote computing device according to the user input. As another non-limiting example, the imaging device 30 may active or enable functions (i.e., scanning, copying, printing, fax transmission) on the imaging device in response to the receipt 46 of processed data.
Some, more specific, imaging device embodiments may be explained with reference to FIG. 5. In these embodiments, the imaging device 30 is configured to receive 50 menu data formatted in a markup language from a remote computing device. The communication link by which the menu data is communicated may be established and maintained using a Hypertext Transfer Protocol (HTTP). The markup language may comprise terms from Hypertext Markup Language (HTML), Extensible Markup Language (XML), Wireless Markup Language (WML), Extensible Hypertext Markup Language (XHTML) and/or other languages.
Once the menu data is received 50, it may be displayed 52 on the imaging device user interface display 36. As in previously described embodiments, the menu data is typically intended to prompt user input on imaging device user interface 32. Display 52 of the remotely-stored menu data may be accomplished with a browser application that is native to the imaging device 30.
In these embodiments, the imaging device 30 is further configured to route 54 user input received though its user interface 32 to a remote computing device. The remote computing device that receives the user input may then run an application or otherwise process the user input and return the results of the processing to the imaging device 30. Accordingly, the imaging device 30 is further configured to receive 56 processed data from a remote computing device. In some embodiments, the imaging device 30 may perform one or more functions in response to the receipt 56 of processed data.
Some embodiments of the present invention may be explained with reference to FIG. 6. These embodiments comprise a remote computing device (RCD) 60, which has a communications link 64. Communications link 64 may be a wired connection (as shown in FIG. 6) comprising a network cable, a Universal Serial Bus (USB) cable, a serial cable, a parallel cable, a powerline communication connection such as a HomePlug connection or other wired connections. Alternatively, the communications link 64 may comprise a wireless connection, such as an IEEE 802.11(b) compliant connection, a Bluetooth connection, an Infrared connection, such as those defined in the Infrared Data Association (IrDA) standard or some other wireless connection. In some embodiments, RCD 60 may further comprise a data storage device 62, which is typically a hard drive, but may also be an optical drive device, such as an array of compact disk drives, flash memory or some other storage device.
Embodiments of RCD 60 may be further described with reference to FIG. 7. In these embodiments, RCD 60 comprises a processor 72 for processing data and running programs such as operating systems and applications. RCD 60 may further comprise memory 74, which may be in the form of Random Access Memory (RAM) and Read Only Memory (ROM), Generally, any applications processed by processor 72 will be loaded into memory 74. RCD 60 may further comprise a network interface 78, which allows RCD 60 to communicate with other devices, such as an imaging device 30. In some embodiments, RCD 60 may also comprise a user interface 80, but this is not required in many embodiments. Storage 62 may be used to store applications and data that may be accessed by an imaging device 30 of embodiments of the present invention. Processor 72, memory 74, storage 62, network interface 78 and, optionally, user interface 80 are typically linked by a system bus 76 to enable data transfer between each component. Communications link 64 may couple the RCD 60 to other devices via network interface 78.
In some embodiments, described with reference to FIG. 8, an RCD 60 may comprise menu data stored on storage device 62 or in memory 74. This menu data may be configured for display on an imaging device user interface 32. Menu data may be stored in many formats and configurations. In some embodiments menu data may take the form of terms expressed with a markup language. The markup language may comprise terms from Hypertext Markup Language (HTML), Extensible Markup Language (XML), Wireless Markup Language (WML), Extensible Hypertext Markup Language (XHTML) and/or other languages. In these embodiments, menu data may be sent 82 through a communications link 64 to an imaging device 30. Accordingly, menu data configured for display on an imaging device is stored on RCD 60.
An RCD 60, of some embodiments, will be further configured to receive 84 user input obtained through the user interface 32 of an imaging device 30 and transferred to the RCD 60 over communications links 38 & 64. Once this input data is received at an RCD 60, the input data may be processed 86. This processing 86 may comprise conversion of the data to a new format, execution of commands contained within the data or some other process. Once the input data has been processed 86, the processed output may be sent 88 back to the imaging device 30 where the processed output may be used in an imaging device process or function.
In some embodiments, as described with reference to FIG. 9, an RCD 60 may send 90 menu data configured for an imaging device display 36 using a markup language. The markup language menu data is then received at the imaging, device 30 and displayed to a user, Typically, this will prompt the user to enter an input on the imaging device user interface 32. This user input will then be sent by the imaging device 30 to the RCD 60. The RCD 60 will then receive 92 the input data prompted by the display of the menu data on the imaging device 30. Once received, the input data may be processed 94 on the RCD 60. Processing may comprise the selection, recordation and/or modification of a form, document or other data stored on RCD 60, the authorization of a user identified by the user input, the translation of a document input by the user, generation of a map or other directions related to user input or some other process or function.
Some embodiments of the present invention may be described with reference to FIGS. 10 & 11. These embodiments comprise at least one RCD 60 and a plurality of imaging devices 30a-30d. In these embodiments, at least one of the imaging devices 30a-30d comprises a user interface 32 with a display 36 and user input panel 34 that is integral with the display (i.e., touch-screen) or a separate input unit. RCD 60 is connected to imaging devices 30a-30d by a communications link and network 100 to enable data transmission between RCD 60 and imaging devices 30a-30d. 
In these embodiments, menu data is stored on RCD 60 and sent 110 to at least one of the imaging devices 30a-30d where the menu data is displayed on a user interface. Any of Imaging devices 30a-30d that receive the menu data are configured to accept 112 and transmit 114 user input to an RCD 60. Once the user input data is received at the RCD, the data may be processed 116 as discussed in previously described embodiments. The result of processing 116 may then be sent 118 back to any combination of the imaging devices 30a-30d. 
In these embodiments, a single RCD 60 may be used to provide processing power, resources and functionality to a plurality of imaging devices 30a-30d without reproducing these resources in each imaging device. In some embodiments, data generated by input on one imaging device 30a may be directed to another imaging device 30d for processed data output or final processing.
Some embodiments of the present invention may be described with reference to FIG. 12. In these embodiments, an imaging device (IDev) 120 comprises a user interface 124, which is capable of receiving user input and displaying data to a user. The user interface 124 will typically comprise a display, often in the form of a touch panel. The display may be used to display data to a user. This data may comprise menu data to prompt for a user selection or data entry, such as a user ID and password, form selection or some other input. The imaging device 120 has a communication link 122, which may comprise a typical computer network connection, a serial cable or some other wired or wireless communication link as described in other embodiments. The communication link 122 may connect the imaging device 120 to a remote computing device (RCD) 126a, 126b, such as a server. The RCD 126a, 126b may be used to store documents, such as forms, and other data and make that data accessible from the imaging device 120. The RCD 126a, 126b may also execute applications that interact with or receive input from the imaging device 120 and its user interface 124. In some embodiments, a database 125 may be linked to the imaging device 120 and/or an RCD 126a, 126b. In some embodiments, on RCD 126b or database 125 may be connected to an IDev 120 over a wide area network such as the internet 128.
Accounting Data Maintenance Embodiments
Some embodiments of the present invention comprise methods and systems for maintaining imaging device (IDev) accounting data when a primary server becomes unavailable. These embodiments comprise a lightweight accounting backup server (LABS) application capable of running on other servers or practically any networked computing device.
In a typical imaging device system, IDevs are placed under accounting control, meaning that they are connected to an application running on a server that is tasked with recording the device's activity. In addition to recording device activity, such as the number of copies made by each individual or on each account, a server application may also enable and disable IDev functions in relation to a user's credentials. This is done for the purpose of being able to charge accounts or individuals for the use of the IDev. In a typical system, when an accounting application fails or becomes temporarily unavailable, the IDev may be entirely disabled, preventing users from using the IDev to accomplish their tasks. The IDev may also remain enabled but with no record of the IDev usage. Both of these alternatives are unacceptable in a typical commercial setting.
Embodiments of the present invention comprise methods and systems that have the capability to continue providing accounting control over an imaging device when the main accounting server is down. In these embodiments, this is achieved with a lightweight accounting backup server (LABS) running on one or more personal computers in the system. When the primary accounting server returns to service, it may query the LABS for their accounting data and then update the primary IDev activity log.
Some embodiments of the present invention may comprise devices with a list of lightweight accounting back-up servers (LABS) that are available to that device. This information may be in the form of a uniform resource locator (URL) pointing to the LABS application's web server entry points. This list can be managed manually or can be populated by some form of discovery mechanism. When the primary server becomes disabled the IDev may attempt to connect to the first LABS on the list and may subsequently continue to connect to each consecutive LABS on the list until it succeeds. Once this occurs, the LABS may take over the accounting control of the IDev.
In some embodiments, the LABS may not fully implement the same set of features that the primary accounting server (PAS) application implements. For example, and not by way of limitation, the LABS may comprise only departmental information for specific departments that typically use a particular IDev rather than have whole enterprise data as in the primary accounting server (PAS). A LABS may implement all the function of a PAS, or it may implement a limited subset. In some embodiments, the LABS may only implement user login and click count functions. In these embodiments, some IDev functions may be unavailable to a user.
When the primary accounting server comes back online a message may be sent to the IDev indicating that the PAS is back in service. The IDev may then notify any LABS and instruct them to transfer any temporary IDev accounting log (TIAL) data they have recorded to the primary server. Finally, the IDev may return to sending accounting data to the primary accounting server until such time as the primary server becomes unavailable again.
In some embodiments, the PAS may communicate directly with a LABS when requesting TIAL data and when receiving TIAL data from the LABS. However, in some embodiments, direct LABS to PAS communication may not be used and communication may be routed through the IDev.
Some embodiments of the present invention may comprise an imaging device (IDev) in communication with one or more additional IDevs and one or more remote computing devices (RCDs) running LABS applications. These IDevs may also have communication with a primary accounting server.
Some embodiments of the present invention may be described with reference to FIG. 13A. These embodiments may comprise one or more networked computing devices 135A-135G & 132A-132D which are linked with one or more accounting-controlled Imaging Devices (IDev) 131A-131D through a communication network 134. These IDevs 131A-131D and computing devices 135A-135G & 132A-132D may also be linked with a Primary Accounting Server (PAS) 133. The PAS may store IDev activity data and accounting data received from the IDevs 131A-131D.
Some of the networked computing devices 135A-135G & 132A-132D on the network 134 also function as LABS 132A-132D. These LABS 132A-132D are applications running on computing devices that provide some kind of accounting control and/or IDev activity recording functions. An LABS 132A-132D may be part of a computing device that has some other primary function. In some embodiments, a LABS 132A-132D may be part of a typical client computing device or workstation that is used for word processing, drafting or some other primary application. The LABS application may run in the background and be transparent to a primary computing device user. 132A-132D
In the event that the primary accounting server (PAS) 133 goes offline, the IDevs 131A-131D may send their accounting data to the lightweight accounting backup servers (LABS) 132A-132D which may temporarily store the data until the primary accounting server (PAS) 133 comes back online.
Some embodiments of the present invention may also be described with reference to FIG. 13B. In these embodiments, a system may comprise a computing device 136 in communication with an imaging device (IDev) 137 and a primary accounting server 138. In these embodiments, the computing device comprises a component that functions as a lightweight accounting back-up server (LABS) 139. The components may be connected with a network 134, such as a wired or a wireless network. The components of these embodiments function as in other embodiments, but the scale of the network is much smaller.
Some embodiments of the present invention may be described with reference to FIG. 14A. These embodiments comprise an accounting-controlled IDev that performs IDev functions for a user. The IDev may also provide access to remote applications to a user. Typically, a user will log on to the system by providing account data and user credentials and the IDev and/or associated local or remote applications will authenticate the user credentials and allow access to the system in relation to the user's account. When the user accesses IDev functions, local applications and/or remote applications, the IDev may monitor this activity and report the activity to an accounting server. This report may be made to a primary accounting server (PAS) or to a lightweight accounting back-up server (LABS) depending on the current status of the network and the servers.
When all servers, devices and network components are functioning properly (the PAS is available to the IDev), the IDev may determine 140 that a PAS is available and send 141 activity data to a primary accounting server (PAS). Alternatively, a message may be sent using an acknowledgement process to determine PAS availability. When a PAS is not available 142, the IDev may access 143 a list of LABS from the primary server and determine the availability 144 of a LABS on that list. When a LABS is determined to be available 145, the IDev may activity data 146 to that LABS. The LABS may then keep a temporary IDev activity log (TIAL) for that IDev. If the LABS is not available 145, the IDev may progress down the list to another LABS and determine the availability 144 of each LABS until it finds an available LABS. The IDev may then send 147 its activity data to the available LABS. In some embodiments, this process may be followed for each activity message sent by the IDev. In other embodiments, once an available LABS is found, that LABS may be designated as the current accounting server (CAS) and all activity data will be sent to that server until a change in availability.
In some embodiments of the present invention, multiple LABS may be used by a single IDev or multiple IDevs. In some embodiments, regional LABS may be assigned to different regions of the area served by the PAS. When a PAS becomes unavailable, IDevs may report to regional LABS depending on their geographic location, account status, user credentials, IDev type or some other regional differentiator. Each region may have a series of LABS. In some embodiments, a regional LABS may have other regional LABS as back-up LABS listed in it's IDevs' lists.
Some embodiments of the present invention may be described with reference to FIG. 14B. The description of these embodiments illustrates a data recovery process that occurs when an unavailable PAS become available. In these embodiments, a PAS may send out a recovery message when it becomes available 148. When the IDevs receive the recovery message, they may re-commence 149 sending activity data to the PAS. In some embodiments, the LABS may also receive the recovery message and, in response, the LABS may send their temporary IDev activity logs (TIALs) to the PAS. In some embodiments, wherein the LABS does not receive the recovery message, the IDev may respond to the recovery message by sending 150 a message to the LABS instructing the LABS to send its TIAL to the PAS. Once the PAS has received TIAL data, the PAS may update 151 its primary IDev activity log (PIAL) with the temporary data logged while the PAS was unavailable.
Some embodiments of the present invention may be described with reference to FIG. 15. These embodiments comprise an IDev that is capable of sending messages and activity data to a primary accounting server (PAS) and to a LABS. In some embodiments, the PAS and the LABS may also communicate directly. In these embodiments, when a PAS becomes unavailable, the IDev is no longer able to send activity data to the PAS. This may be detected by a message acknowledgement process, by pinging the PAS or by many other methods.
When the PAS become unavailable 154, the IDev may access 155 its LABS list to determine the address of an alternate LABS. The IDev may then determine the availability of a first LABS on the list. In some embodiments, this may be done by sending 156 a message to the first LABS on the list according to a send and acknowledge process. If an acknowledgement is received from the first LABS 157, the IDev may send 159 its activity data to the first LABS, which will then compile that data into a TIAL. If the first LABS does acknowledge 157 the message, the IDev may send a message to the next LABS on the list 158 and continue the process until a LABS acknowledges the process, receives the activity data and compiles a TIAL.
Some embodiments of the present invention, illustrated in FIG. 16, comprise an IDev capable of communicating with a LABS. In these embodiments, these elements follow an exemplary process for maintaining activity data during a PAS failure followed by a LABS failure. In this exemplary process, an IDev sends activity data to a LABS, which compiles a TIAL. In these embodiments a send and acknowledge process is used, however, in alternative embodiments the availability of a LABS may be determine by other methods. An IDev may send 162 a message to an LABS in expectation of an acknowledgement (ACK). If an ACK is received 164, the IDev will continue sending 168 activity data to the LABS. If an ACK is not received 164, the IDev may access its LABS list and send a message 166 to the next LABS on the list in expectation of an ACK. This process will continue until the IDev's message receives an ACK at which point the IDev will send its activity data to the acknowledged LABS.
Some embodiments of the present invention, illustrated in FIG. 17, comprise a method and/or system for recovering data to a primary accounting server (PAS) after a period of unavailability. In these embodiments, the PAS comes on-line 170 by connecting to the network with full functionality. The PAS then sends a recovery message 172 that may be received by any IDevs on the network as well as other devices. When an IDev receives the recovery message, the IDev may respond by recommencing the sending of its activity data 173 to the PAS. In some embodiments the IDev may respond to the recovery message by sending a message to the LABS instructing the LABS to send TIAL data to the PAS. The PAS will then receive 176 the TIAL data and update 178 its primary IDev activity log (PIAL) with the TIAL data.
Some embodiments of the present invention, illustrated in FIG. 18, comprise a method and/or system for recovering data to a primary accounting server (PAS) after a period of unavailability. In these embodiments, the PAS comes on-line 180 by connecting to the network with full functionality. The PAS then sends a recovery message 182 that may be received by any IDevs on the network as well as other devices, such as LABSs. When an IDev receives the recovery message, the IDev may respond by recommencing the sending of its activity data 183 to the PAS. In some embodiments a LABS may also respond to the recovery message by sending 184 any TIAL data the LABS has logged to the PAS. In some embodiments, the TIAL data may be sent in response to a specific request 184. The PAS may then receive 186 the TIAL data and update 188 its primary IDev activity log (PIAL) with the TIAL data.
The terms and expressions which have been employed in the forgoing specification are used therein as terms of description and not of limitation, and there is no intention in the use of such terms and expressions of excluding equivalence of the features shown and described or portions thereof, it being recognized that the scope of the invention is defined and limited only by the claims which follow.

## Claims

1. A system for maintaining imaging device (IDev) accounting data, said system comprising:
a) a primary accounting server (PAS), said PAS comprising;
i) a PAS sender for sending messages to an imaging device (IDev) and to a lightweight accounting back-up server (LABS);
ii) a PAS receiver for receiving messages from said IDev;
iii) an updater for updating a (primary IDev activity log (PIAL).

b) an imaging device (IDev), said IDev comprising;
i) an IDev sender for sending messages;
ii) an IDev receiver for receiving messages from said Primary server and said LABS; and

c) at least one LABS in communication with said IDev, said LABS comprising;
i) a LABS receiver for receiving messages and data from said IDev and from said PAS; and
ii) a LABS sender for sending messages to said IDev and to said PAS;

d) wherein said IDev sends a record of its activity to said PAS when said PAS is available and said PAS maintains a primary IDev activity log (PIAL) when said PAS is available;
e) wherein said IDev sends a record of its activity to said LABS when said PAS is not available and said LABs maintains a temporary IDev activity log (TIAL) when said PAS is not available; and
f) wherein said PAS updates said PIAL with said TIAL data after a period of unavailability.

2. A system as described in claim 1 wherein said LABS is an application running on a remote computing device in communication with said IDev and said PAS.

3. A system as described in claim 1 wherein said IDev further comprises a list of said at least one LABS.

4. A system as described in claim 1 wherein said at least one LABS comprises a plurality of LABS accessible in a sequential order thereby forming a multiple redundant back-up server system.

5. A system as described in claim 1 wherein PAS sends an update message to said IDev after a period of unavailability and, in response to said update message, said IDev renews sending a record of its activity to said PAS, requests said TIAL data from said LABS sends said TIAL data to said PAS.

6. A system as described in claim 1 wherein said PAS sends an update message to said LABS after a period of unavailability and, in response to said update message, said LABS sends said TIAL data to said PAS.

7. A system as described in claim 1 further comprising an accounting application for reporting said PIAL data to a user.