UFS Link Power Mode Switching Based on Internal Operation Status
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Solution Overview
Problem
Conventional UFS systems fail to recognize the internal operation status of the UFS device, leading to unnecessary power consumption due to maintaining high-speed modes even when valid signal transmission/reception is not possible.
Innovation Solution
The UFS device actively monitors its internal operation status and autonomously changes the power mode of the reception and transmission channels based on this status, reducing power consumption by transitioning to low-speed modes when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UFS device maintains high-speed mode for communication channels, then communication performance is improved, but power consumption increases unnecessarily when internal operations prevent valid signal transmission
Solution Approach 1:
The patent implements dynamic power mode switching for communication channels based on real-time monitoring of internal operation status. The system transitions between high-speed mode (when internal operations allow valid signal transmission) and low-speed mode (when internal operations prevent valid transmission), thereby adapting communication parameters to actual operational needs and reducing unnecessary power consumption.
Solution Approach 2:
The patent employs a feedback mechanism where the UFS device continuously monitors its internal operation status and uses this information to control the power mode of communication channels. The monitoring unit detects whether internal operations prevent valid signal transmission, and this feedback triggers appropriate power mode adjustments to optimize the balance between communication performance and power consumption.
2Use of energy by moving object
If the UFS device actively monitors internal operation status and dynamically changes power modes, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where the UFS device autonomously monitors its own internal operation status and independently controls the power modes of its communication channels without requiring external host intervention. The device's own control unit performs both monitoring and decision-making functions, simplifying the overall system architecture while achieving dynamic power management.
3Use of energy by moving object
If the UFS device transitions to low-speed mode during internal operations, then power consumption is reduced, but communication performance decreases
Solution Approach 1:
The patent changes the operational parameters of communication channels (specifically the power mode) based on the device's internal operation status. By switching between high-speed and low-speed modes according to whether internal operations prevent valid signal transmission, the system optimizes the trade-off between power consumption and communication efficiency, ensuring high performance is maintained only when actually needed.
Data Source
AI summary
Disclosed is an operation method of a universal flash storage (UFS) device which communicates with a UFS host through a device physical layer. The operation method includes monitoring an internal operation status, changing a power mode of the device physical layer to a low-speed mode, based on the internal operation status, transmitting a first power mode change request to the UFS host, receiving a first power mode change confirmation from the UFS host, and operating based on the low-speed mode with the UFS host through the device physical layer, in response to the first power mode change confirmation.