Communication Apparatus Network Standby Mode Packet Filtering
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Solution Overview
Problem
Communication apparatuses in network standby mode often shift to normal mode unnecessarily when receiving router advertisement packets, leading to reduced power saving effects due to the lack of precise IP address management, causing unnecessary power consumption and potential communication disruptions.
Innovation Solution
A control device that determines whether received packets are for IP address generation or update, preventing unnecessary mode shifts from network standby to normal mode, ensuring only necessary operations are performed, thereby maintaining power savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the apparatus shifts to normal mode upon receiving any packet in network standby mode, then network communication function is maintained, but power consumption increases due to unnecessary mode shifts
Solution Approach 1:
The patent applies local quality by differentiating packet types and applying different processing rules. Instead of treating all packets equally, the system identifies router advertisement packets (which trigger unnecessary wake-ups) versus other packets (which may legitimately require normal mode). This selective approach maintains network reliability for legitimate communications while reducing power consumption by filtering out spurious wake-up triggers.
Solution Approach 2:
The patent implements feedback through the wake-up timer mechanism that monitors IP address expiration dates. The timer provides feedback about when the next required wake-up should occur, allowing the system to distinguish between packets that trigger necessary wake-ups (those related to IP address management) and those that do not. This feedback loop enables intelligent decision-making about mode transitions based on actual network state requirements.
2Use of energy by moving object
If the apparatus lacks IP address management function in network standby mode, then power saving is achieved, but IP address expiration cannot be managed causing potential communication disruptions
Solution Approach 1:
The patent applies preliminary action by setting a wake-up timer in advance based on the IP address expiration date before the apparatus enters network standby mode. This timer is configured to wake up the apparatus at the appropriate time to perform IP address renewal, ensuring continuous network connectivity without requiring full IP address management functionality during standby mode. The preliminary timer setup allows the system to maintain reliability while preserving power savings.
Solution Approach 2:
The patent extracts the essential IP address management function from the full network communication functionality. Instead of maintaining complete IP address management capabilities in network standby mode, the system extracts only the critical timer-based expiration monitoring and uses minimal processing to handle wake-up events. This extraction approach maintains necessary reliability for IP address continuity while significantly reducing processing requirements and power consumption during standby mode.
3Reliability
If the apparatus shifts to normal mode to manage IP address expiration, then IP address management is performed, but power saving effects are reduced due to frequent mode shifts
Solution Approach 1:
The patent applies self-service by enabling the apparatus to autonomously manage its own IP address expiration through the wake-up timer mechanism. The timer automatically wakes up the apparatus at the appropriate time without requiring external intervention or continuous monitoring in normal mode. This self-service approach allows the system to perform IP address renewal at the optimal moment while minimizing the duration and frequency of normal mode operation, thereby preserving power saving effects.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the wake-up timer value based on the IP address expiration date. Instead of using fixed intervals, the system calculates and sets the timer parameter to match the actual expiration timing. This parameter adaptation allows precise control over when the apparatus wakes up for IP address management, ensuring minimal disruption to power saving mode while maintaining reliable IP address continuity.
Data Source
AI summary
A control device for controlling a communication apparatus having a first operation mode in which power with which a network communication function is operable is supplied, and a second operation mode in which power with which an operation of at least part of the network communication function is restricted is supplied, the control device includes a first determination unit configured to determine whether a packet received in the second operation mode is a packet for use in generating an Internet Protocol (IP) address, and a control unit configured to, in a case where the first determination unit determines that the received packet is not a packet for use in generating an IP address, control the communication apparatus not to shift from the second operation mode to the first operation mode.