IP Telephone Low-Power Mode via Dynamic State Transition
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Solution Overview
Problem
IP telephones consume significant power due to constant network connection and display requirements, lacking a low-power mode similar to computers and monitors, which increases energy usage in office and hotel environments where devices are often idle.
Innovation Solution
Implementing a low-power operating mode in IP telephones that can be initiated by a timer, central controller command, user proximity indication, or special key sequence, allowing the device to enter deep or light sleep modes, and exit upon user activity or scheduled wake-up, using a processor and LAN interface to manage power states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IP telephone maintains constant network connection and display visibility, then call reception and user visibility are improved, but power consumption increases significantly
Solution Approach 1:
The patent implements dynamic power state changes allowing the IP telephone to transition between full-power operational mode and low-power sleep mode based on usage conditions. The system dynamically adjusts network interface power state and display backlighting according to whether the device is in use or idle, resolving the contradiction between maintaining reliability for call reception and reducing power consumption during idle periods.
Solution Approach 2:
The patent changes operational parameters by introducing sleep modes with reduced power consumption levels. When idle, the system transitions to a low-power state with reduced network activity and display backlighting, while maintaining wake-up capabilities. This parameter change allows the system to operate at different power levels based on实际需求, balancing reliability and energy efficiency.
2Use of energy by moving object
If IP telephone enters low-power mode to save energy, then power consumption is reduced, but network connectivity and response time deteriorate
Solution Approach 1:
The patent implements preliminary wake-up mechanisms where the system can quickly transition from low-power sleep mode to full operational mode when needed. The processor maintains wake-up capabilities and can rapidly re-establish network connections upon detecting user presence or incoming calls, ensuring minimal disruption to response time while achieving significant power savings during idle periods.
Solution Approach 2:
The system employs periodic monitoring mechanisms that allow the IP telephone to maintain awareness of its operational state and network conditions while in low-power mode. This periodic action enables the system to quickly respond when needed without requiring continuous full-power operation, thus balancing energy savings with responsive performance.
3Illumination intensity
If display backlight remains active for visibility, then user visibility is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic backlighting where the display backlight is activated only during operational periods and dimmed or turned off during idle sleep modes. This periodic action maintains display visibility when needed while significantly reducing power consumption during extended idle periods, resolving the contradiction between illumination intensity and energy usage.
Data Source
AI summary
Power management is provided in an Internet protocol (IP) telephone and system to provide energy savings during times that the IP telephone is not in use or use is not expected. A low-power operating mode disables at least a portion of the IP telephone. The low-power operating mode may be initiated by a command received by the IP telephone from the IP telephone controller according to a schedule, which may be modified locally by the user to individualize the user's schedule. The low-power operating mode may alternatively be activated manually by a user pressing a special key, sequence or combination. The low-power operating mode is canceled upon an indication that a user either is or should be present at the IP telephone.