IPP Printer Notification of Prohibition and Alternative Settings
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Solution Overview
Problem
Existing printers using the IPP standard struggle to effectively notify external devices of prohibition settings and alternative settings, leading to potential printing issues due to incompatible setting combinations.
Innovation Solution
A printer configured to notify external devices of resolution information, select appropriate setting values based on its situation, and perform printing accordingly, while also providing state and reason codes, and combined state messages to external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the printer notifies external devices of prohibition settings and alternative settings using the IPP standard, then the compatibility and flexibility of printing operations are improved, but the complexity of communication protocols and information management increases
Solution Approach 1:
The notification information is segmented into distinct components: prohibition settings (identifying incompatible setting combinations) and alternative settings (providing replacement options). This segmentation allows external devices to process only the relevant information needed for their specific printing operations, reducing the complexity burden while maintaining comprehensive compatibility.
Solution Approach 2:
The printer proactively notifies external devices of prohibition and alternative settings before actual printing operations occur. By providing this information in advance through the IPP protocol, external devices can pre-validate their print jobs and adjust settings beforehand, preventing communication errors and reducing the need for complex error handling during printing.
2Adaptability or versatility
If the printer provides detailed resolution information to external devices, then the ability to resolve incompatible setting combinations is improved, but the amount of information transmitted and processed increases
Solution Approach 1:
The resolution information is tailored to the specific incompatible setting combination detected in the print job. Rather than providing all possible resolution information for every potential setting combination, the printer provides only the locally relevant resolution information for the actual conflict at hand, reducing information overhead while maintaining full resolution capability.
Solution Approach 2:
The alternative setting values act as intermediaries between the prohibited setting combination and the desired printing outcome. By providing specific alternative settings that resolve the incompatibility, the system mediates the conflict without requiring external devices to process all possible resolution paths, thus reducing information transmission requirements.
3Ease of operation
If the printer automatically selects setting values based on its situation, then the ease of operation for external devices is improved, but the level of automation and decision-making complexity in the printer increases
Solution Approach 1:
The printer performs self-service by automatically selecting appropriate setting values from alternative options based on its current situation and capabilities. This self-service capability relieves external devices of the burden of making complex setting decisions, improving ease of operation while the printer's internal automation handles the complexity of evaluating and selecting optimal settings.
Solution Approach 2:
The automatic setting selection process incorporates feedback from the printer's situation assessment. The printer evaluates its current state, the received print job requirements, and the available alternative settings, then selects the most appropriate combination. This feedback-driven automation maintains simplicity for external devices while enabling sophisticated decision-making within the printer.
Data Source
AI summary
A printer performs printing based on a print instruction received from an external device and conforming to the IPP (Internet Printing Protocol) standard. The printer has a controller including a CPU and a memory. The CPU executes various processes according to a program read from the memory. The memory stores various programs and data including an IPP response program, an IPP print program, and notification information. The notification information includes a prohibition table, a solution table, a status table, and a reason table.