Patents Assigned to Electronics and Telecommunications Research Inst.
  • Patent number: 12107781
    Abstract: Disclosed is a method for generating and transmitting a reference signal in a clustered DFT-spread OFDM transmission scheme. A method for generating and transmitting a DM-RS in a clustered DFT-spread-OFDM scheme comprises: a step of generating DM-RS sequences corresponding to the number of clusters allocated for an uplink transmission; and a step of mapping the generated DM-RS sequences to the relevant DM-RS symbol positions for each cluster. Accordingly, the method for generating and transmitting a reference signal according to the present invention, in which DM-RS sequences are allocated and transmitted on a cluster basis, uses a complete DM-RS sequence for each cluster, and therefore inter-cell interference can be weakened, and problems which might occur when applied to a multi-user MIMO (MU-MIMO) scheme can be solved.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: October 1, 2024
    Assignee: Electronics and Telecommunications Research Inst.
    Inventors: Byung Jang Jeong, Young Jo Ko, Bang Won Seo, Jae Young Ahn
  • Patent number: 11870546
    Abstract: The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.
    Type: Grant
    Filed: August 19, 2022
    Date of Patent: January 9, 2024
    Assignee: Electronics and Telecommunications Research Inst.
    Inventors: Kap Seok Chang, Il Gyu Kim, Hyeong Geun Park, Young Jo Ko, Hyo Seok Yi, Chan Bok Jeong, Young Hoon Kim, Seung Chan Bang
  • Patent number: 11871434
    Abstract: The method for transmitting control information in a mobile communication system includes: determining a control channel resource for transmitting control information by means of the data channel region; and transmitting the control information using the determined control channel resource. A capacity for control information, which increases for multiple user multiple-input multiple-out (MIMOs) in a heterogeneous network environment, for heterogeneous network interference control using carrier aggregation, for frequent use of a multicast-broadcast single frequency network (MBSFN) subframe, and for a CoMP transmission control, may be satisfied. Further, an adaptive resource allocation based on a requested capacity for control information may be enabled, and the efficient utilization of resources may also be enabled.
    Type: Grant
    Filed: February 2, 2023
    Date of Patent: January 9, 2024
    Assignee: Electronics and Telecommunications Research Inst.
    Inventors: Bang-Won Seo, Young-Jo Ko, Tae-Gyun Noh, Jae-Young Ahn
  • Patent number: 11871470
    Abstract: There are provided a method for processing an exceptional case of establishing a default bearer and a device therefor in order to solve a problem in that a user equipment cannot actually receive an IP service by accessing a packet network while failing in establishing the default bearer in a mobile communication system. A method for processing an exceptional ease of establishing a default hearer in a mobility management entity includes: receiving a network attachment request from a user equipment; transmitting a network attachment acceptance including an activation request of the default bearer to the user equipment in response to the network attachment request; and cancelling a network attachment procedure when a completion response to the activation request of the default bearer is not received from the user equipment within a predetermined time.
    Type: Grant
    Filed: April 9, 2022
    Date of Patent: January 9, 2024
    Assignee: Electronics and Telecommunications Research Inst.
    Inventors: Mi Jeong Yang, Jae Wook Shin, Ae-Soon Park
  • Patent number: 11076383
    Abstract: Provided is a method for transmitting paging information in a cellular system. An object of the method is transmitting paging information which can improve applicability of a limited radio resource by variably and flexibly setting up and mapping a transport channel and a physical channel in order to transmit information notifying start of downlink information from a base station to a terminal in a cellular system for packet transmission. The method includes the steps of: forming a paging channel (PCH) in a transport channel corresponding to generation of paging information; setting a paging indication channel (PICH) based on the paging information and forming the paging indication channel in a radio resource of a physical layer; and allocating the paging channel to the radio resource of the physical layer.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: July 27, 2021
    Assignee: Electronics and Telecommunications Research Inst.
    Inventors: Jae Heung Kim, Jung Im Kim, Kyoung Seok Lee, Soo Jung Jung, Seung Chan Bang, Byung Han Ryu
  • Patent number: 8514792
    Abstract: The present invention relates to a mobile station, a base station, and a method for an uplink service that provides a high-speed data service between the base station and the mobile station in a wireless communication system. A method for providing an uplink service in a mobile station includes, after TCP data are received from a base station, measuring a partial round trip time which is a time until ACK which is a response to the received TCP data is inputted into an uplink transmission MAC buffer, transmitting information on the measured partial round trip time to the base station, receiving resource allocation information—unicast resource allocation information for transmitting the ACK to the base station in the mobile station—from the base station, and transmitting the ACK of the TCP data received from the base station on the basis of the resource allocation information to the base station.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: August 20, 2013
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Inst.
    Inventors: Juhee Kim, Kyung Soo Kim
  • Patent number: 8441974
    Abstract: The present invention relates to a method of providing a multicast broadcast service. A message for providing an MBS (Multicast Broadcast Service) between network constituent elements is defined by applying a message defined in a wireless channel, and functions and parameters to be performed by the network constituent elements are defined. Therefore, the MBS can be provided in a wideband wireless access network that is a field of a mobile communication system and includes a wire channel.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: May 14, 2013
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Inst.
    Inventors: Jung-Mo Moon, Mi-Young Yun, Sang-Ho Lee
  • Patent number: 8437358
    Abstract: A method for controlling uplink IP packet filtering in a mobile terminal in a 3GPP Evolved Packet System (EPS) is provided, including an information receiving operation of receiving IP address information allocated to user equipment, and filtering information required for delivering an uplink IP packet received from the user equipment; and a filtering operation for determining which packet data network and a bearer the IP packet is delivered to, based on the IP address information and the filtering information. In a 3GPP evolved packet system supporting a default bearer function, a packet data network to which an uplink IP packet is delivered and a bearer identifier can be efficiently determined when the user equipment simultaneously accesses one or more packet data networks and is allocated several IP addresses, resulting in effective uplink packet filtering.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: May 7, 2013
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Inst.
    Inventors: Jae Wook Shin, Kwang-Ryul Jung, Ae-Soon Park
  • Publication number: 20120319813
    Abstract: Provided is an apparatus and method for processing a scene that may prevent overload of a scene caused by transmission of excessive information, by generating geometric information corresponding to meaningful information, as which sensed information may be construed semantically, and by only transmitting the geometric information to the scene, instead of transmitting, to the scene, all of the sensed information with respect to a real world.
    Type: Application
    Filed: January 14, 2011
    Publication date: December 20, 2012
    Applicant: Electronics and Telecommunications Research Inst.
    Inventors: Seong Yong Lim, In Jae Lee, Ji Hun Cha, Hee Kyung Lee
  • Patent number: 8335268
    Abstract: The present invention relates to a multiple antenna transmission system and a signal transmission method In the signal transmission method using multiple antennas, a plurality of subcarrier symbols are grouped as a plurality of groups including first and second tiles that are basic resource management units including two or more subcarriers included in a set frequency domain, phases of subcarrier symbols included in a first tile are shifted to be a first phase shifting value, and phases of subcarrier symbols included in a second tile are shifted to be a second phase shifting value that is different from the first phase shifting value.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: December 18, 2012
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Inst.
    Inventors: Seung-Joon Lee, Dong-Seung Kwon
  • Patent number: 8024545
    Abstract: Disclosed herein are a flash file system and an address translation method. The flash file system includes a file system, a Flash Translation Layer (FTL), and flash memory. The FTL receives Local Block Addresses (LBAs) from the file system, and translates the LBAs into Physical Block Address (PBAs. The flash memory receives the resulting PBAs. The FTL includes a memory block in which a multi-stage clustered hash table for mapping the LBAs to the PBAs is stored, and performs the address translation using the clustered hash table.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: September 20, 2011
    Assignees: Inha-Industry Partnership Institute, Electronics and Telecommunications Research Inst.
    Inventors: Deok-Hwan Kim, Kwang-Hee Park
  • Patent number: 7882133
    Abstract: An apparatus for processing an integrated query from various sensor networks and a method thereof are provided. The apparatus includes an integrated query parser for parsing an integrated query and analyzing a syntax of the parsed integrated query; an integrated query execution plan generator for analyzing meaning of the parsed integrated query and generating an integrated query execution query for processing an integrated query; an integrated query optimizer for optimizing a process time for the generated execution plan based on query information stored in the query information storage and sensor network information stored in the sensor network information storage; and an integrated query executer for detailing the integrated query execution plan by controlling an execution order according to the optimized integrated query and transferring the detailed integrated query execution plan to an event data process executer, a temporal data process executer, and a continuous data process executer.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: February 1, 2011
    Assignee: Electronics and Telecommunications Research Inst.
    Inventors: Jae-Jun Yoo, Jun-Wook Lee, Min-Soo Kim, In-Sung Jang, Mal-Hee Kim, Yong-Joon Lee, Jong-Hyun Park
  • Publication number: 20010021213
    Abstract: A 0.98 &mgr;m semiconductor laser of a ridge waveguide (RWG) structure includes: to be lengthen the durability of a semiconductor laser by increasing a catastrophic optical damage (COD) level, a ridge having a fixed width and length so that the strip may stop in the position of 30 &mgr;m on the basic of end portion of an output facet along length direction of a resonator; and a non-waveguide region in the end portion of both sides of a resonator.
    Type: Application
    Filed: April 12, 2001
    Publication date: September 13, 2001
    Applicant: Electronics and Telecommunications Research Inst.
    Inventors: Jung Kee Lee, Kyung Hyun Park, Dong Hoon Jang, Chul Soon Park
  • Patent number: 5029165
    Abstract: A method of allotting the signal links and routing the signal messages in the signalling transfer points of a common channel signalling system which are level type signalling transfer points for carrying out message transfer functions based on the common channel signalling No. 7 protocol of the ITTCC. Each signalling transfer point includes a signalling link selection value composed of a number of bits, signal data links, signal links, signal network functions, clusters and groups, connected in such a manner that a signalling transfer point includes a certain number of signal network functions, each signal network function including a certain number of signal links, each signal link being connected to one signal data link. The signalling transfer point includes a number of clusters of signal links (equal to the number of signal network functions) grouped in a plurality of clusters (equal to the number of signal links).
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: July 2, 1991
    Assignees: Electronics and Telecommunications Research Inst., Korea Telecommunications Authority
    Inventors: Yanghee Choi, Yunghee Lee, Yungsik Bak, Yunghwan Cha, Daeyung Chun, Yungman Kang