Electronics and Telecommunications Research Institute

Kt Corporation

Sk Telecom Company, Ltd.

Samsung Electronics Co., Ltd.

Hanaro Telecom., Inc.

Ktfreetel Co., Ltd

Jae-Heung Kim

Byung-Han Ryu

Seung-Chan Bang

Jung-Im Kim

Kyoung-Seok Lee

Chul-Sik Yoon

Kun-Min Yeo

Soon-Yong Lim

Soo-Jung Jung

Tae-Joong Kim

Jong-Suk Chae

Young-Jo Ko

Jae-Ryong Shim

Hyuck-Jae Lee

Narm-Hee Lee

Chang-Joo Kim

Il-Gyu Kim

Seung-Ku Hwang

Seung-Chang Bang

Jae-Hee Cho

Kyoung Seok Lee

Hyun-Kyu Chung

Kwang-Chun Lee

Min-Hee Cho

Kwang-Seop Eom

Seok-Joo Shin

Boong-Gee Song

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 research 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 reception/transmission (DRX/DTX) parameters including discontinuous DRX/DTX cycle information for terminals operating in a transmission suspension mode, which is a sub-state of an active state; and b) performing DRX/DTX based on the DRX/DTX parameters in the terminals operating in the transmission suspension mode.

Method and apparatus for discontinuous transmission/reception operation for reducing power consumption in cellular 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 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.

Growing community of inventors

Daejeon, South Korea

Jae-Heung Kim