Samsung electronics co., ltd. (20240096395). DEVICE, OPERATING METHOD, MEMORY DEVICE, AND CXL MEMORY EXPANSION DEVICE simplified abstract

DEVICE, OPERATING METHOD, MEMORY DEVICE, AND CXL MEMORY EXPANSION DEVICE

Organization Name

samsung electronics co., ltd.

Inventor(s)

Sunghye Cho of Suwon-si (KR)

Eunae Lee of Suwon-si (KR)

Jungmin You of Suwon-si (KR)

Yeonggeol Song of Suwon-si (KR)

Kyomin Sohn of Suwon-si (KR)

Kijun Lee of Suwon-si (KR)

Myungkyu Lee of Suwon-si (KR)

DEVICE, OPERATING METHOD, MEMORY DEVICE, AND CXL MEMORY EXPANSION DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240096395 titled 'DEVICE, OPERATING METHOD, MEMORY DEVICE, AND CXL MEMORY EXPANSION DEVICE

Simplified Explanation

The abstract of the patent application describes a device, a method of a memory controller, a memory device, and a compute express link (CXL) memory expansion device for managing a row hammer attack in volatile memory. The memory controller detects the pattern size and row distribution of the row hammer attack pattern based on input row addresses, determines whether to perform refresh management, and provides refresh management commands to the volatile memory for every access corresponding to the pattern size.

• Explanation of the patent/innovation:

   - Device, method, and memory expansion device for managing row hammer attacks in volatile memory
   - Memory controller detects row hammer attack pattern and determines refresh management based on row distribution
   - Refresh management commands provided to volatile memory for each access corresponding to the attack pattern

• Potential applications of this technology:

   - Data centers
   - High-performance computing
   - Cloud computing

• Problems solved by this technology:

   - Mitigating row hammer attacks in volatile memory
   - Improving memory reliability and performance
   - Enhancing system security

• Benefits of this technology:

   - Increased memory reliability
   - Improved system performance
   - Enhanced security against row hammer attacks

• Potential commercial applications of this technology:

   - Memory controller manufacturers
   - Data center operators
   - Cloud service providers

• Possible prior art:

   - Previous methods of mitigating row hammer attacks in memory controllers
   - Existing memory management techniques for volatile memory

1. 1. 1. Unanswered Questions:
         1. 1. How does the memory controller determine the pattern size of the row hammer attack pattern?

The abstract mentions that the memory controller detects the pattern size, but it does not provide specific details on the method used for this detection.

1. 1. 1. 1. 2. What type of refresh management commands are provided to the volatile memory?

While the abstract mentions that refresh management commands are provided, it does not specify the exact nature of these commands or how they help mitigate row hammer attacks.

Original Abstract Submitted

a device, an operating method of a memory controller, a memory device, and a compute express link (cxl) memory expansion device all for managing a row hammer are provided. the device includes a volatile memory and a memory controller that is configured to detect, based on input row addresses, a pattern size of a row hammer attack pattern and a row distribution of row hammer addresses, to determine, according to a type of the row distribution, whether to perform refresh management, and for every l access corresponding to the pattern size, to provide, to the volatile memory, a refresh management command and a target row address, where l is an integer greater than or equal to 1.