Electronics and Telecommunications Research Institute

Kt Corporation

Sk Telecom Company, Ltd.

Samsung Electronics Co., Ltd.

Jung-Im Kim

Jae-Heung Kim

Kyoung-Seok Lee

Seung-Chan Bang

Byung-Han Ryu

Soo-Jung Jung

Tae-Joong Kim

Young-Jo Ko

Jae-Ryong Shim

Jong-Suk Chae

Hyuck-Jae Lee

Narm-Hee Lee

Jae Heung Kim

Seung Chan Bang

Kyoung Seok Lee

Seong Rag Kim

Seuck Ho Won

Ki-Chul Han

Seung-Chang Bang

Chul Sik Yoon

Changhee Lee

Yeon-Kyu Moon

Ok-Sun Park

Hyun-Yong Hwang

JaeSheung Shin

Jae Ryong Shim

Sung-Min Oh

Hee-Young Jung

Young-Geol Song

Yeon-Cu Kim

Taesoo Kwon

Provided is a downlink control information transmitting and receiving method which can maximize the use of limited radio resources by effectively forming an uplink signaling message to be transmitted from a base station to a terminal and transmitting the formed uplink signaling message with a minimum amount of radio resources occupied. The method for transmitting downlink data generation indication information for a base station to inform a terminal of packet data transmission in a packet-based cellular system, includes the steps of: a) generating the downlink data generation indication information; b) recording radio resource allocation information in downlink scheduling information for transmitting the downlink data generation indication information, and allocating information for the downlink data generation indication information to downlink-shared radio resources; and c) transmitting the downlink scheduling information and the information for the downlink data generation indication information according to a transmission cycle.

Method to transmit downlink signaling message on cellular systems for packet transmission and method for receiving the message

Disclosed is a method for effectively forming uplink control information transmitted through a downlink from a base station to a terminal in a mobile communication system for providing a packet service and transmitting the uplink control information with minimum radio resources occupied. The method includes generating uplink control information; allocating the uplink control information to a downlink-shared radio resource for packet data transmission based on downlink scheduling information; and transmitting the radio resource to a terminal. The present invention is applied to a mobile communication system.

Method for transmitting up link control signal in mobile communication system

The present invention relates to aApreamble allocation methodand a random access methodin a mobile communication system. In the present invention,includes allocatingone among preamble resourcesis allocatedtoaspecific mobilestationsstationin advance, before random access. The mobilestations requeststation requestsrandom access by transmitting a preamble based on the pre-allocated preamble resource to a base station.It is therefore possible to preventAcollision caused bythe fact that other mobile stations transmit the same preamblethe same preamble transmission by another mobile station may be prevented.

Preamble allocation method and random access method in mobile communication system

Provided is a method and apparatus for discontinuously transmitting/receiving packets for low-power consumption of a terminal in a cellular system for packet transmission. The present invention provides a method and apparatus that can perform a low-power consuming operation when a terminal is in active state in a cellular system. The method for discontinuously transmitting/receiving packet data to reduce power consumption of a terminal in a cellular system, including the steps of: a) establishing discontinuous transmission/reception (DTX/DRX) parameters including discontinuous DTX/DRX cycle information for terminals operating in a transmission suspension mode, which is a sub-state of an active state; and b) performing DTX/DRX based on the DTX/DRX parameters in the terminals operating in the transmission suspension mode.

Method for reducing power consumption of a terminal in cellular system

Disclosed is a method and apparatus for RA in a cellular system. The RA in the cellular system includes receiving an RA preamble from a terminal for RA, transmitting, to the terminal, an RA response message including a sequence of the received RA preamble and uplink resource information of the terminal and overload state information with respect to the RA, receiving control information generated based on the RA response message from the terminal through the uplink resource information, and transmitting control response information with respect to the received control information.

Apparatus and method for random access in cellular system

Disclosed is a method for efficiently reporting measurement information required for handover in active-state terminals executing a power-saving operation in a packet-based communication system. The method includes the steps of: (a) receiving a discontinuous reception (DRX) period, a discontinuous transmission (DTX) period, and a measurement information report parameter that are decided by a base station; and (b) measuring channel quality according to a measurement information report period included in the measurement information report parameter, and reporting measurement information formed based on the measurement information report parameter by using radio resources allocated by the base station.

Method of reporting measurement information in packet based on cellular system

The present invention relates to a method for transmitting uplink control information in a mobile communication system; and, more particularly, to a method for effectively forming uplink control information transmitted through a downlink from a base station to a terminal in a mobile communication system for providing a packet service and transmitting the uplink control information with minimum radio resources occupied. The method includes the steps of generating uplink control information; allocating the uplink control information to a downlink-shared radio resource for packet data transmission based on downlink scheduling information; and transmitting the radio resource to a terminal. The present invention is applied to a mobile communication system.

A system for searching in accordance with an embodiment of the present invention includes: one or more sub nodes configured to generate one or more sub bloom filters corresponding to one or more object identification information; and a representative node configured to generate a representative bloom filter by applying an orthogonal code to each of said sub bloom filters and aggregating the sub bloom filters having the orthogonal code applied thereto, wherein, when the representative node receives a search request, the representative node is configured to apply the orthogonal code to the representative bloom filter and to determine whether object identification information included in the search request is included in sets corresponding to the sub bloom filters by referring to the representative bloom filter having the orthogonal code applied thereto.

System and method for searching using orthogonal codes

A base station infers a random access failure rate depending on a random access collision of terminals performing random access and controls a random access opportunity of a terminal that fails the random access by using the random access failure rate of each terminal. Also, information for the controlled random access opportunity is transmitted to the terminal that fails the random access.

Method and apparatus for controlling random access opportunity in mobile communication system

A layered transmission apparatus transmitting information regarding a plurality of layers includes: coding units coding an information bit of a corresponding layer to generate code bits; bit interleaving units bit-interleaving a corresponding code bit to generate interleaved symbols; a modulation unit classifying layers into layer groups, and modulating interleaved symbols corresponding to each of the groups to generate a modulation symbol of each of the groups; a gain control unit controlling gain of the modulation symbol of each of the groups; and an adding unit adding gain-controlled modulation symbols of the groups to generate a transmission symbol.

Layered transmission apparatus and method, reception apparatus and reception method

A method for managing a multicast and broadcast service in a base station according to an embodiment of the present invention includes: transmitting a multicast and broadcast service control channel to a terminal; transmitting an indicator channel for indicating a change of the multicast and broadcast service control channel by using a unicast control channel when the multicast and broadcast service control channel is changed, to the terminal; and transmitting the changed multicast and broadcast service control channel to the terminal.

Method and device for managing of multicast and broadcast service

Growing community of inventors

Daejeon, South Korea

Jung-Im Kim