Lg Electronics Inc.

Wook Bong Lee

Bin Chul Ihm

Moon Il Lee

Jin Young Chun

Hyun Soo Ko

Jae Hoon Chung

Jin Sam Kwak

Ja Ho Koo

Sung Ho Park

Jae Wan Kim

Han Gyu Cho

Jin Soo Choi

Su Nam Kim

Dong Cheol Kim

Hyun Phill Ko

Dong Guk Lim

Jin Hyuk Jung

Jae Won Chang

Ki Seon Ryu

Sung Ho Moon

Young Soo Yuk

Seung Hee Han

Yeong Hyeon Kwon

Min Seok Noh

Hyun Woo Lee

Yong Ho Kim

In Uk Jung

Jian Xu

Ji Won Kang

Seung Hyun Kang

Min Seok Oh

Jin-Young Chun

Woo Suk Kwon

Jeong Ki Kim

Suk Woo Lee

Ae Ran Youn

Young Seob Lee

Jong Young Han

Ji Ae Seok

Moon Ii Lee

Dong Ku Kim

Jinsoo Choi

Hyukjin Chae

Sung Jun Park

So Yeon Kim

Jong Min Kim

Youngsoo Yuk

Ki Hyoung Cho

Dong Kyu Kim

Doo Hyun Sung

Yo Han Kim

Ji Wook Chung

Hyuk Jin Chae

Intae Hwang

Jang Hoon Yang

Jin-young Chun

Bin Chul Imh

Bin Chui Ihm

Il Moon Lee

Xu Jian

Cheolwoo Yoo

Janghoon Yang

Yohan Kim

Ki Sun Ryu

A method for efficiently transmitting and receiving downlink control information is disclosed. The method includes, at a base station, receiving feedback information including a precoding matrix index (PMI) from a user equipment (UE) and transmitting precoding information having a predetermined bit number according to the number of antenna ports and a transmission mode of the base station. The precoding information of a predetermined transmission mode in the precoding information includes confirmation information indicating that the base station uses a PMI which is recently received from the UE.

Method for transmitting and receiving downlink control information

A technique for receiving and transmitting downlink reference signals is disclosed. When transmitting downlink data demodulation reference signals (DMRS) (or reference signals for downlink data demodulation) by using two or more layers, the DMRS of each layer may be multiplexed by using a code division multiplexing method and then transmitted. The DMRS for each of the two or more layers may be used for one user equipment or for two or more user equipments. And, downlink control signals for transmitting and receiving such DMRS may be configured to have the same format regardless of a single-user mode (or SU-MIMO mode) or a multi-user mode (or MU-MIMO mode), thereby being used.

Technique for transmitting and receiving downlink reference signals

A method of transmitting and receiving data using a superframe structure is disclosed. A method for transmitting data through a superframe including a superframe header, includes generating the superframe which includes a data region including user data and includes a dedicated control region including data region allocation information indicating resource allocation for the data region, and transmitting the superframe. The dedicated control region is arranged at at least one of locations except for a subframe of the superframe header. A user equipment which does not have to transmit and receive data decodes only data region allocation information using information of the data region indicated by a dedicated control region, thereby minimizing power loss, reducing a feedback delay, and reducing system overhead using a superframe structure.

Method for transmitting and receiving data with superframe structure

A method and apparatus for transmitting a signal in a wireless communication system are provided. The method includes: generating R spatial streams each of which is generated on the basis of an information stream and a reference signal; generating N transmit streams on the basis of the R spatial streams and a precoding matrix (where R&#x3c;N); mapping the N transmit streams to at least one resource block; and generating N signals from the N transmit streams mapped to the at least one resource block, and the transmitting the N signals to a user equipment through respective antennas.

Method and apparatus for transmitting signal in wireless communication system

A method of transmitting control information includes dividing frequency bandwidth into ranges to which the same PMI (precoding matrix index) is applied, obtaining multiple antenna information by the range to which the same PMI is applied and transmitting the multiple antenna information. Since multiple antenna information is transmitted by the unit of a range to which the same PMI is applied, radio resources allocated for transmitting the multiple antenna information may be reduced, thereby enhancing data transmission efficiency.

Method for transmitting control information in multiple antenna system

A method for performing an adaptive modulation and coding scheme in a mobile communication system. Including receiving a signal and selecting a modulation and coding scheme (MCS) level from an MCS subset of an MCS set considering information derived from the signal, by a mobile station. The MCS subset is selected in accordance with a service type related to the mobile station and the MCS subset is configured with one or more MCS levels, the MCS set is represented by 5 bits and the MCS subset is represented by 4 bits to indicate MCS value, respectively, and the 4 bits of the MCS subset is a part of the 5 bits of the MCS set.

Method for performing an adaptive modulation and coding scheme in mobile communication system

A multi-input multi-output (MIMO) system considers either reliability for each antenna or a time/frequency location, and transmits a signal at an unequal ratio for each antenna according to the consideration result. The method for use in the MIMO system including multiple antennas includes processing a signal according to an unequal ratio transmission scheme employing the multiple antennas at an unequal ratio, and transmitting the processed signal via the multiple antennas.

Method for transmitting a signal in multi-antenna communication system

A method and apparatus for transmitting a signal in a wireless communication system are provided. The method includes: generating R spatial stream each of which is generated on the basis of an information stream and reference signal; generating N transmit streams on the basis of the R spatial streams and a precoding matrix (where R&#x3c;N); mapping the N transmit streams to at least one resource block; and generating N signals from the N transmit streams mapped to the at least one resource block, and the transmitting the N signals to a user equipment through respective antennas.

A method for updating a group traffic key used for encrypting and decrypting multicast data in a wireless communication system is described. The method includes receiving, from the base station, a first message comprising a new group security seed; and updating the group traffic key based on the new group security seed.

Traffic encryption key management for machine to machine multicast group

A method and an apparatus for transmitting feedback of a mobile station (MS) in a wireless communication system supporting a multi-carrier operation are provided. The method includes transmitting feedback information to a base station, and in this case, the feedback information is transmitted through a MAC control message and the feedback information includes carrier information of an activation carrier related to the MAC control message.

Method and apparatus for transmitting feedback information in wireless communication system

The present disclosure relates to a method for performing communication between a terminal and a base station in a radio access system supporting multi-radio access technology (RAT), the method being characterized in that it comprises the steps of performing an access procedure between a first base station supporting a cellular radio access technology and a second base station supporting a short-range radio access technology; the second base station receiving, from the first base station and through a first radio scanner, control information relating to the transmission of an identification signal (IDS) for detecting the second base station of the terminal; and the second base station transmitting the IDS through the first radio channel to the terminal based on the received control information, wherein the first radio channel is the radio channel corresponding to the first base station.

Method and apparatus for detecting an access point in a radio access system

Disclosed are a device for controlling uplink transmission power and a method for the same. In a terminal device for controlling uplink transmission power according to the present invention, a receiving antenna receives a first message containing a power correction value from a base station. A processor determines the transmission power value which will be used in transmitting a second message, based on the power correction value. A sending antenna transmits the second message to the base station, using the determined transmission power value, and, at this time, the power correction value is a value for correcting the transmission-power value is a value for correcting the transmission-power value which was used during initial ranging by the terminal or handover ranging of the terminal.

Device for controlling uplink transmission power and a method for the same

A method of downlink subchannelization in a wireless communication system includes: transmitting a network entry and network discovery information including an open loop (OL) region parameter; and mapping a physical resource unit (PRU) to a contiguous resource unit (CRU) or a distributed resource unit (DRU) with respect to ith frequency partition based on the OL region parameter, wherein a permutation sequence used for mapping a PRU of the ith frequency partition (PRU) to a CRU of the ith frequency partition (CRU) or a DRU of the ith frequency partition (DRU) is determined by a seed value, and the seed value is set to be a particular value according to the value of the OL region parameter.

Method and apparatus of downlink subchannelization in wireless communication system

Growing community of inventors

Anyang-si, South Korea

Wook Bong Lee