Packet Filter for Image Formers in Power Saving Mode
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Solution Overview
Problem
Image forming apparatuses face inefficiencies in managing network packets between normal and power saving modes, requiring duplicate protocol processing parts for main and sub response systems, which leads to unnecessary network response and increased power consumption.
Innovation Solution
The apparatus includes a filter that distributes packets received from the network to a main response part for normal mode operations and a sub response part for power saving mode operations, eliminating the need for duplicate protocol processing parts and optimizing packet processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main system responds to all network packets in normal mode, then network response completeness is improved, but power consumption increases
Solution Approach 1:
The system is divided into two independent response paths: a main response part for normal mode operations and a sub response part for power saving mode operations. The filter part segments incoming packets and directs them to appropriate response parts based on protocol type, allowing the main system to enter low-power state while critical network functions remain responsive.
Solution Approach 2:
The system dynamically switches between normal mode and power saving mode based on packet type and system state. The filter part dynamically routes packets to either the main response part or sub response part, enabling adaptive power management that maintains necessary network responsiveness while reducing power consumption when full system operation is not required.
2Reliability
If duplicate protocol processing parts are provided for main and sub response systems, then response capability in power saving mode is improved, but device complexity increases
Solution Approach 1:
The sub response part is designed with multi-functionality to handle multiple protocol types (ARP, ICMP, IGMP, DHCP) using shared processing resources. This universal design allows the sub response part to respond to various network packets in power saving mode without requiring separate dedicated processing units for each protocol, thereby reducing overall device complexity.
Solution Approach 2:
The filter part, main response part, and sub response part are merged into an integrated system where the filter intelligently distributes packets to appropriate response handlers. This consolidation eliminates the need for completely separate duplicate protocol processing stacks, reducing complexity while maintaining dual-mode responsiveness.
3Use of energy by moving object
If the main system enters power saving mode by distributing all packets to subsystem, then power consumption is reduced, but network response efficiency deteriorates
Solution Approach 1:
The filter part acts as an intermediary between the network connection part and the response parts. It mediates packet distribution by analyzing packet protocols and routing them to the appropriate response handler (main or sub response part). This intermediary function ensures that power saving mode operations maintain high network response efficiency by directing critical packets to the active sub response part without requiring full main system activation.
Data Source
AI summary
Provided is an image forming apparatus that increases an efficiency for network response. Thus, a network connection part receives a packet from an external network. A filter part distributes the packet received by network connection part for each protocol. A main response part that responds to the packet distributed by the filter part in the normal mode for controlling operation of each part. A sub response part that responds to some types of the packet, which is not distributed to the main response part by the filter part, in addition to the power saving mode where the main response part does not respond to the some types of the packet.