Channel Interleaving for High-Bandwidth Memory Systems
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Solution Overview
Problem
Semiconductor devices face challenges in efficiently managing memory access operations across high-bandwidth and low-bandwidth memory devices with different data transmission rates, leading to insufficient memory size and bandwidth for high-bandwidth operations.
Innovation Solution
A channel interleaving method is implemented, where a memory system comprising a high-bandwidth memory device and a low-bandwidth memory device, with an interleaving unit that performs memory interleave operations among their access channels, allowing the system to extend the memory size and bandwidth of the high-bandwidth device by utilizing the low-bandwidth device's channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high-bandwidth memory device is used to provide high-speed data transmission, then the data transmission rate is improved, but the memory size becomes insufficient
Solution Approach 1:
The patent combines a high-bandwidth memory device with a low-bandwidth memory device into a unified memory system. The high-bandwidth memory provides fast data transmission for critical operations, while the low-bandwidth memory supplies additional memory capacity. This merging resolves the contradiction by allowing the system to achieve both high speed and large memory size through coordinated operation of two memory devices with complementary characteristics.
Solution Approach 2:
The memory system is segmented into two functional parts: a high-bandwidth memory device handling performance-critical tasks and a low-bandwidth memory device handling capacity requirements. This segmentation allows each memory device to be optimized for its specific function, with the high-bandwidth device providing fast access for frequently used data and the low-bandwidth device providing additional storage for less frequently accessed data.
2Quantity of substance
If multiple memory devices with different bandwidths are used, then the memory size and bandwidth are extended, but the device complexity increases
Solution Approach 1:
The patent introduces an interleaving unit as an intermediary component that manages the complexity of coordinating multiple memory devices with different bandwidths. This interleaving unit automatically determines which memory device should be accessed based on the memory access pattern, shielding the rest of the system from the underlying complexity of managing heterogeneous memory devices.
3Power
If channel interleaving is performed among access channels of high-bandwidth and low-bandwidth memory devices, then the memory bandwidth is enhanced, but the control complexity increases
Solution Approach 1:
The interleaving unit serves as a mediator that handles the complex control tasks of channel interleaving between high-bandwidth and low-bandwidth memory devices. It automatically manages the coordination between different memory devices, handling address translation, data routing, and bandwidth optimization without requiring complex manual control from the rest of the system.
Data Source
AI summary
A memory system includes a high-bandwidth memory device, the high-bandwidth memory device having a relatively high operation bandwidth, the high-bandwidth memory device having a plurality of access channels. A low-bandwidth memory device has a relatively low operation bandwidth relative to the high-bandwidth memory device, the low-bandwidth memory device having one or more access channels. An interleaving unit performs a memory interleave operation among the plurality of access channels of the high-bandwidth memory device and an access channel of the one or more access channels of the low-bandwidth memory device.