DSP Power Management Using Dynamic State Segmentation
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Solution Overview
Problem
Existing energy-saving solutions for digital signal processor modules often result in unacceptable delays when power is restored, as they require time to execute boot code and load necessary resources, compromising performance.
Innovation Solution
A dynamic energy-saving method that manages digital signal processors (DSPs) across multiple operating states, including a ready state, a first energy-saving state with quick ramp-up, and a second energy-saving state with longer ramp-up, optimizing power usage based on current system load and transition times to minimize delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a computing device is powered down to save energy, then energy consumption is reduced, but the device experiences unacceptable delay when power is restored and becomes ready for use
Solution Approach 1:
The patent applies dynamics by implementing multiple operational states (fully operational, partially operational, and powered down) that allow the system to dynamically adjust its readiness level based on predicted workload patterns. The system transitions between these states adaptively, maintaining partial operational capability during low-utilization periods to reduce wake-up delays while conserving energy.
Solution Approach 2:
The system performs preliminary actions by maintaining a warmed-up state with loaded code and resources before full operational demand is required. Predictive algorithms prepare the system in advance by keeping critical components in a partially operational state, so when workload increases, the transition to full operational capacity is rapid rather than requiring complete boot-up sequences.
2Use of energy by moving object
If digital signal processors are placed in energy-saving states to reduce power consumption, then energy efficiency is improved, but the processors experience delay when transitioning back to ready state
Solution Approach 1:
The patent segments the operational states into distinct levels (fully operational, partially operational with different degrees of resource loading, and powered down). This segmentation allows the system to choose the appropriate transition path based on predicted needs, enabling faster recovery by selecting partially operational states that maintain critical resources while consuming less power during low-utilization periods.
Solution Approach 2:
The system changes operational parameters by adjusting the degree of processor warming and resource preloading based on predicted workload. Rather than binary on/off states, the system varies parameters such as clock speed, memory allocation, and code loading extent to optimize the trade-off between power consumption and transition speed.
3Reliability
If boot code and resources are loaded during power restoration, then the device becomes operational, but the process takes unacceptable time
Solution Approach 1:
The system performs preliminary loading of boot code and critical resources during periods when the system is in a partially operational state, before full operational demand is required. Predictive algorithms identify upcoming workload increases and trigger pre-loading sequences in advance, so that when the system needs to transition to full operational capacity, critical resources are already available and loading time is minimized.
Solution Approach 2:
The system dynamically adjusts the extent of code and resource loading based on predicted workload requirements. Rather than always loading complete boot sequences, the system adapts the loading scope to match anticipated needs, reducing unnecessary loading time while ensuring sufficient resources are available for operational readiness.
Data Source
AI summary
Embodiments include a method of managing operating states of a plurality of digital signal processors (DSPs). The method generally includes determining a first number of the plurality of DSPs to operate in a ready state, determining a second number of the plurality of DSPs to operate in a first energy-saving state, and determining a third number of the plurality of DSPs to operate in a second energy-saving state. In some embodiments, the first energy-saving state corresponds to a dormant mode of the DSPs, and the second energy-saving state corresponds to a reset mode of the DSPs.