Memory Controller Map Segment Transmission Logic
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Solution Overview
Problem
In memory systems, the existing technologies face challenges in efficiently managing map data transmission to hosts or computing devices, leading to performance degradation and complexity, especially when handling high-frequency map segments and map miss ratios.
Innovation Solution
A memory system and method that selectively transmit memory map segments to a host based on read counts and map miss ratios, where the controller determines whether to upload segments when the map miss ratio exceeds a threshold, optimizing data processing efficiency by minimizing unnecessary data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If map segments are transmitted to the host based on read count thresholds, then data processing efficiency is improved, but device complexity increases due to monitoring and threshold management
Solution Approach 1:
The controller pre-calculates and stores read counts for each map segment in advance, so that when transmission decisions are needed, the counting work has already been completed. This eliminates the need for real-time counting during transmission decisions, improving efficiency while keeping the complexity manageable through pre-computation
Solution Approach 2:
The patent introduces a map segment monitoring mechanism that acts as an intermediary between the memory device and host. This intermediary layer tracks read counts and map miss ratios, automatically making transmission decisions based on predefined thresholds, thus isolating the complexity from both the memory device and host
2Loss of energy
If map segments with high read counts are selectively transmitted, then overhead is reduced, but loss of information may occur when map miss ratio is high
Solution Approach 1:
The controller continuously monitors the map miss ratio and uses this feedback to adjust transmission decisions. When the map miss ratio exceeds a threshold, the controller transmits the corresponding map segment to the host, ensuring data accuracy is maintained while still reducing overhead for frequently accessed segments with low miss ratios
Solution Approach 2:
The patent changes the parameter being monitored from only read count to a combination of read count and map miss ratio. This dual-parameter approach allows the system to identify segments that are both frequently accessed and have low miss ratios, transmitting only those segments to reduce overhead while maintaining information accuracy
3Reliability
If all map segments are transmitted to the host, then reliability is improved, but productivity decreases due to unnecessary data transfer
Solution Approach 1:
The patent extracts only the necessary map segments from the complete set and transmits them to the host. By using read count and map miss ratio thresholds, the system identifies and extracts only those segments that need to be transmitted, eliminating unnecessary data transfer while maintaining reliability for the extracted segments
Data Source
AI summary
A memory system may include a memory device and a controller including a memory, suitable for generating map data for mapping between a physical address corresponding to data within the memory device in response to a command and a logical address received from a host, wherein the controller selects a memory map segment among a plurality of memory map segments, when a read count corresponding to the selected memory map segment is greater than or equal to a first threshold, calculates a map miss ratio of the memory using a total read count and a map miss count, and transmits the selected memory map segment to the host when the map miss ratio is greater than or equal to a second threshold.