Patents by Inventor Hong Chan ROH

Hong Chan ROH has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10599574
    Abstract: The present disclosure relates to a memory control device which can distribute and transfer a read request for cache hit data so as to allow a hard disk as well as a cache memory to process the read request, thereby maximizing the throughput of the entire storage device, and an operation method of the memory control device.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: March 24, 2020
    Assignee: SK TELECOM CO., LTD.
    Inventors: Hong Chan Roh, Sang Hyun Park, Jong Chan Lee, Hong Kyu Park, Jae Hyung Kim
  • Publication number: 20180373636
    Abstract: The present disclosure relates to a memory control device which can distribute and transfer a read request for cache hit data so as to allow a hard disk as well as a cache memory to process the read request, thereby maximizing the throughput of the entire storage device, and an operation method of the memory control device.
    Type: Application
    Filed: April 1, 2016
    Publication date: December 27, 2018
    Inventors: Hong Chan ROH, Sang Hyun PARK, Jong Chan LEE, Hong Kyu PARK, Jae Hyung KIM
  • Patent number: 9715446
    Abstract: Disclosed is a method for updating an inverted index of a flash solid state disk (SSD). The method including: storing postings of a term that is present in only an in-memory inverted index in a block of an output buffer and reading postings of a last block of each posting list to be updated from an on-disk inverted index to be stored in each block of an input buffer, by scanning the on-disk inverted index and the in-memory inverted index; moving postings of the input buffer to the blocks of the output buffer for each block and attaching new postings of the in-memory inverted index to the block corresponding to the output buffer; and updating the on-disk inverted index by using the postings of each block of the output buffer.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: July 25, 2017
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Sang Hyun Park, Won Mook Jung, Hong Chan Roh, Min Cheol Shin
  • Publication number: 20150120774
    Abstract: Disclosed are a modified B+ tree node searching method and apparatus including setting a search range including one or more key values based on an input of a user; generating a pointer set including pointers for searching for child nodes based on the set search range; transmitting an I/O request in parallel by using the generated pointer set; and searching for data of a node corresponding to a request for the input based on the transmitted I/O request.
    Type: Application
    Filed: November 30, 2012
    Publication date: April 30, 2015
    Inventors: Sang Hyun Park, Hong Chan Roh, Min Cheol Shin
  • Publication number: 20140351490
    Abstract: Disclosed is a method for updating an inverted index of a flash solid state disk (SSD). The method including: storing postings of a term that is present in only an in-memory inverted index in a block of an output buffer and reading postings of a last block of each posting list to be updated from an on-disk inverted index to be stored in each block of an input buffer, by scanning the on-disk inverted index and the in-memory inverted index; moving postings of the input buffer to the blocks of the output buffer for each block and attaching new postings of the in-memory inverted index to the block corresponding to the output buffer; and updating the on-disk inverted index by using the postings of each block of the output buffer.
    Type: Application
    Filed: May 22, 2014
    Publication date: November 27, 2014
    Applicant: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Sang Hyun PARK, Won Mook JUNG, Hong Chan ROH, Min Cheol SHIN