Battery-Powered Buffer Capacity Control for Memory Data Protection
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Solution Overview
Problem
Conventional memory systems face challenges in efficiently managing data transfer and storage during unexpected power loss, as they rely on volatile memory and require immediate charging of batteries to save data, which can lead to data loss and inefficiencies in energy usage.
Innovation Solution
A memory system comprising a nonvolatile memory, a buffer, a battery, and a processing circuit that restricts data storage based on battery voltage, allowing for efficient data saving and recovery by switching power sources and optimizing data management through a power monitoring unit and limit value table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the buffer storage capacity is increased to save more data during power loss, then data protection reliability is improved, but energy consumption increases and the buffer may overflow when battery charge is insufficient
Solution Approach 1:
The buffer storage capacity is made dynamic by adjusting it according to the battery charge level. When the battery charge is sufficient, the buffer can allocate more storage capacity for data protection. When the battery charge is low, the buffer automatically reduces its storage capacity to conserve energy and prevent overflow. This dynamic adjustment resolves the contradiction between maintaining high data protection reliability and managing energy consumption effectively.
Solution Approach 2:
The system changes the parameter of buffer storage capacity based on the battery charge level. By monitoring the battery charge and adjusting the buffer capacity accordingly, the system optimizes the balance between data protection capability and energy consumption, ensuring that the buffer operates within safe energy limits while maximizing data protection when possible.
2Reliability
If the buffer storage capacity is increased to protect more data, then data protection capability is improved, but the risk of data loss increases when battery charge is insufficient
Solution Approach 1:
The system implements feedback control by continuously monitoring the battery charge level and adjusting the buffer storage capacity in response. This feedback mechanism ensures that the buffer only allocates storage capacity when sufficient battery charge is available, thereby protecting data without risking data loss due to insufficient power. The feedback loop prevents the buffer from operating beyond safe energy limits.
Solution Approach 2:
The buffer storage capacity is dynamically adjusted based on real-time battery charge conditions. When battery charge drops below a threshold, the system automatically reduces the buffer capacity to prevent data loss. This dynamic adaptation ensures that data protection capability is optimized without exposing the system to the risk of data loss from insufficient battery power.
3Reliability
If immediate charging is implemented after startup, then data protection readiness is improved, but system complexity and energy management overhead increase
Solution Approach 1:
The system performs preliminary charging of the battery immediately after startup, before data protection operations are needed. This preliminary action ensures that the battery is charged and ready to support buffer operations, improving data protection readiness. The system monitors battery charge levels and begins charging early, avoiding the need for complex real-time decision-making during critical data protection moments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures reliable data saving and recovery even during unexpected power loss, optimizing energy usage by controlling data storage based on battery charge, allowing for uninterrupted operation and efficient data management.
Implementation Method 1
a battery which stores energy supplied from the outside
Data Source
AI summary
According to one embodiment, a memory system includes a nonvolatile memory, a buffer, a battery and a processing circuit. The battery stores energy supplied from the outside. The processing circuit, after start of the supply of energy from the outside, starts the acceptance of a request from the outside, starts a process in accordance with the accepted request, and restricts the amount of data in the buffer referring to a voltage of the battery. The process uses the buffer.