MEMORY SYSTEM, HOST SYSTEM, AND METHOD OF PERFORMING WRITE OPERATION IN MEMORY SYSTEM

• US 20150149789A1
• Filed: 11/05/2014
• Published: 05/28/2015
• Est. Priority Date: 11/27/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Kwang-Hoon Kim, Man-Keun Seo, Sang-Kyoo Jeong
• Inventors: SEO, MAN-KEUN, KIM, KWANG-HOON, JEONG, SANG-KYOO
• Granted Patent: US 9,904,628 B2
• Time in Patent Office: Days
• US Class Current: 713/193
• CPC Class Codes: G06F 12/1408 by using cryptography for digital transmission H04L9/00
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 3/0608 Saving storage space on storage systems
• CPC Class Codes: G06F 3/0622 in relation to access
• CPC Class Codes: G06F 3/0623 in relation to content
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

A write operation is performed in a memory system by encoding, in the memory system, original data transmitted from a host system, according to a first type of host command, to produce an encoding result, transmitting information about the encoding result to the host system after the encoding, and writing the encoding result or the original data into a nonvolatile memory device, according to a second host command, wherein the second host command is transmitted from the host system based on the information about the encoding result.

Claims

1. A method, comprising:

encoding, in a memory system, original data transmitted from a host system, according to a first type of host command, to produce an encoding result;

transmitting information about the encoding result to the host system after the encoding; and

writing the encoding result or the original data into a nonvolatile memory device, according to a second host command, wherein the second host command is transmitted from the host system based on the information about the encoding result.

2. The method of claim 1, wherein the first type of host command is a command for writing the original data into a storage area of a random access memory in the memory system, the storage area supporting a compression function or an encryption function.

4. The method of claim 1, wherein the encoding of the original data comprises selecting one of multiple compression engines to compress the original data or selecting one of multiple encryption engines to encrypt the original data, based on the first type of host command.

5. The method of claim 1, wherein the encoding of the original data comprises:

storing the original data transmitted from the host system in a first A address area of a random access memory in the memory system, based on a first A host command;

reading the original data stored in the first A address area and compressing the read original data; and

storing the compressed data in a second address area of the random access memory, wherein the first type of host command comprises the first A host command.

6. The method of claim 1, wherein the encoding of the original data comprises:

storing the original data transmitted from the host system in a first B address area of a random access memory in the memory system, based on a first B host command;

reading the original data stored in the first B address area and encrypting the read original data; and

storing the encrypted data in a second address area of the random access memory, wherein the first type of host command comprises the first B host command.

7. The method of claim 1, wherein the encoding of the original data comprises:

storing the original data transmitted from the host system in a first C address area of a random access memory in the memory system, based on a first C host command;

reading the original data stored in the first C address area and compressing the read original data;

storing the compressed data in a first B address area of the random access memory;

reading the data stored in the first B address area and encrypting the read data; and

storing the encrypted data in a second address area of the random access memory, wherein the first type of host command comprises the first C host command.

11. The method of claim 1, wherein the second host command comprises storage location information for target data designated by the information about the encoding result, size information for the target data, and logical address information to be mapped to the target data.

12. The method of claim 1, wherein the second host command comprises storage location information for target data selected in the host system according to a data compression rate from among the encoding result and the original data, size information for the target data, and logical address information to be mapped to the target data.

13. The method of claim 1, wherein the performing of the operation of writing the data comprises:

receiving the second host command comprising storage location information for target data stored in a random access memory of the memory system, size information for the target data, and logical address information to be mapped to the target data;

converting the logical address information in the second host command into physical address information;

reading the target data from a random access memory of the memory system based on the storage location information for the target data; and

writing the read target data to a storage location of the nonvolatile memory device that corresponds to the physical address information.

3. (canceled)

8-10. -10. (canceled)

14. (canceled)

15. A memory system comprising:

a nonvolatile memory device; and

a memory controller that performs an operation of writing or reading data to or from the nonvolatile memory device, wherein the memory controller comprises;

a random access memory comprising a first address area for supporting an encoding function and a second address area for storing data produced by the encoding function;

an encoder that encodes data stored in the first address area to produce an encoding result and stores the encoding result in the second address area; and

a processor that stores original data transmitted from a host system in the first address area of the random access memory according to a first type of host command, transmits information about the encoding result to the host system, and performs an operation of reading data from the random access memory according to a second host command based on the information about the encoding result and writing the read data into the nonvolatile memory device.

16. The memory system of claim 15, wherein the second host command is transmitted from the host system based on the information about the encoding result, and the information about the encoding result comprises storage location information and size information of the random access memory for at least one of the original data and the encoding result.

17. The memory system of claim 15, wherein the processor generates the information about the encoding result, which comprises storage location information and size information for target data selected from among the encoding result and original data stored in the random access memory, based on a compression rate for the original data according to the compression process of the encoder, determines the encoding result as the target data where the compression rate is greater than or equal to a first threshold value, and determines the original data as the target data where the compression rate is less than the first threshold value.

18. The memory system of claim 15, wherein the encoder comprises one or more compression engines for compressing data or one or more encryption engines for encrypting data, and selects one of the one or more compression engines or one of the one or more encryption engines to compress or encrypt the data stored in the first address area, based on the first type of host command.

19. The memory system of claim 15, wherein the first address area of the random access memory comprises a first A address area for supporting a compression function or a first B address area for supporting an encryption function, and the processor selectively stores the original data in the first A address area or the first B address area according to the first type of host command.

20. The memory system of claim 19, wherein the first address area of the random access memory further comprises a first C address area for supporting both a compression function and an encryption function, and the processor selectively stores the original data in the first A address area, the first B address area, or the first C address area according to the first type of host command.

21. The memory system of claim 15, wherein the encoder compresses and/or encrypts the data stored in the first address area of the random access memory, and stores the compressed and/or encrypted data in the second address area.

22. The memory system of claim 15, wherein the processor converts logical address information in the second host command into physical address information, and writes data read from a storage area of the random access memory that is designated by the second host command, in a storage area of the nonvolatile memory device that corresponds to the physical address information.

23. A host system comprising:

a random access memory that stores host data; and

a central processing unit that generates a first type of host command for an encoding process in a memory system, transmits the first type of host command to the memory system, and generates a second host command based on information about an encoding result received from the memory system, and transmits the second host command to the memory system.

24. The host system of claim 23, wherein the first type of host command is a command for performing an operation of writing the host data in a storage area of a random access memory in the memory system, the storage area supporting a compression function or an encryption function, and the second host command is a command for reading data from a storage area of the random access memory in the memory system that is designated by the second host command, and writing the read data in a nonvolatile memory device of the memory system.

25. The host system of claim 23, wherein the central processing unit generates a first A host command with respect to host data belonging to data of a first group of which an expected compression rate is greater than or equal to a second threshold value, based on the type of host data to be stored in the memory system, and the first A host command belongs to the first type of host command and comprises a command for performing an operation of writing the host data into a storage area of a random access memory in the memory system, the storage area supporting a compression function.