Lg Electronics Inc.

Blackberry Corporation

Microsoft Technology Licensing, LLC

Dentons US Llp

Moon Il Lee

Jae Hoon Chung

Hyun Soo Ko

Seung Hee Han

Bin Chul Ihm

Wook Bong Lee

Yeong Hyeon Kwon

Jin Young Chun

Min Seok Noh

Sung Ho Moon

Ja Ho Koo

So Yeon Kim

Hyun Phill Ko

Jin Hyuk Jung

Hyun Woo Lee

Sung Ho Park

Jin Sam Kwak

Jae Won Chang

Dong Cheol Kim

Jae Wan Kim

Kyu Jin Park

Seung Hyun Kang

Ji Ae Seok

Joon Kui Ahn

Ki Jun Kim

Young Woo Yun

Suk Hyon Yoon

Su Nam Kim

Ki Hwan Kim

Hyunsoo Ko

Han Gyu Cho

Ji Won Kang

Jaho Koo

Jea Hoon Chung

Jin Soo Choi

Jian Xu

Jae Won Jang

Ki Tae Kim

Dong Kyu Kim

Dong Guk Lim

Doo Hyun Sung

Hyung Ho Park

Ji Woong Jang

Jong Young Han

Dae Won Lee

Seunghee Han

Sung Jun Park

Ki Seon Ryu

Yong Ho Kim

Sung Ho Cho

Jong Min Kim

Yong Hwan Kim

Jeong Ki Kim

Eun Jong Lee

Ae Ran Youn

Jin-Young Chun

Seung Woo Nam

Ki Ho Nam

Han Kyu Cho

Jin-young Chun

Bin Chul Imh

Jae Hoon Chun

Xu Jian

Min Seo Noh

The present invention relates to a wireless communication system and provides an efficient control information transmission method and apparatus for supporting a multiple antenna transmission technique. A method is provided for transmitting downlink hybrid automatic repeat request (HARQ) information related to an uplink multiple codeword transmission and includes receiving the uplink multiple codeword transmission, generating HARQ information related to each of the multiple codewords based on a result of decoding each of the multiple codewords, modulating the HARQ information, and transmitting the modulated HARQ information via one or more physical HARQ indicator channels (PHICHs).

Efficient control information transmission method and apparatus for supporting multiple antenna transmission technique

A method for transmitting a reference signal in a multi-antenna system is provided. The method includes: selecting at least one orthogonal frequency division multiplexing (OFDM) symbol in a subframe containing a plurality of OFDM symbols; allocating a channel quality indication reference signal (CQI RS) capable of measuring a channel state for each of a plurality of antennas to the selected at least one OFDM symbol; and transmitting the CQI RS, wherein the CQI RS is allocated to an OFDM symbol which does not overlap with an OFDM symbol to which a common reference signal to be transmitted to all user equipments in a cell or a dedicated reference signal to be transmitted to a specific user equipment in the cell is allocated.

Method and apparatus for transmitting reference signal in multi-antenna system

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control signal via a PUCCH in a wireless communication system, and to an apparatus for the method, wherein the method comprises the following steps: joint-coding a plurality of pieces of control information to obtain a single codeword; obtaining a first modulation symbol sequence from the single codeword; obtaining, from the first modulation symbol sequence, a plurality of second modulation symbol sequences corresponding to each slot in the PUCCH; cyclically shifting the plurality of second modulation symbol sequences in a time domain to obtain a plurality of third modulation symbol sequences; performing a discrete Fourier transform (DFT) precoding process on the plurality of third modulation symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH.

Method and apparatus for transmitting control information in a wireless communication system

A method for transmitting a channel status information reference signals (CSI-RSs) for a maximum of eight antenna ports includes mapping the CSI-RSs for a maximum of eight antenna ports onto a data region of a downlink subframe having a normal cyclic prefix (CP) configuration according to a predetermined pattern; and transmitting the downlink subframe to which the CSI-RSs mapped, wherein the predetermined pattern defines the CSI-RSs to be mapped onto two OFDM symbols of the data region in the downlink subframe and mapped to at least one of four subcarrier positions in each of the two OFDM symbols, and wherein the four subcarrier positions defined by the predetermined pattern may be two consecutive subcarrier positions and two other consecutive subcarrier positions spaced apart by four subcarriers.

Method and apparatus for transmitting downlink reference signal in wireless communication system that supports multiple antennas

A method for a user equipment (UE) in a wireless communication system, includes receiving channel state information reference signal (CSI-RS) for at one antenna port from a network in a subframe, wherein the CSI-RS is mapped to at least one pair of resource elements (REs) per physical resource block (PRB) pair in consecutive orthogonal frequency division multiplexing (OFDM) symbols in the subframe, and wherein the subframe includes two slots, and each slot includes six OFDM symbols based on an extended cyclic prefix (CP).

Method and apparatus for transmitting reference signal in wireless communication system

A method of transmitting a reference signal by a base station in a wireless communication system is provided. The method includes: generating a plurality of reference signals for channel measurement, wherein the plurality of reference signals for channel measurement are different types; and transmitting the plurality of reference signals for channel measurement, wherein the plurality of reference signals for channel measurement are transmitted using one or more subframes as a duty cycle.

Apparatus and method for transmitting a reference signal in a wireless communication system

A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to each layer, and transmitting the mapping symbols through a plurality of antennas. At least one of the first codeword and the second codeword is mapped to at least 3 layers and the number of layers is larger than 3.

Method of data transmission in multiple antenna system

A method of measuring interference to perform efficient data communication is disclosed. A method of measuring interference of neighboring cells comprises allocating one or more first resource elements, to which pilot signals are allocated, to predetermined symbol regions included in a first resource block; allocating one or more second resource elements for measuring interference of the neighboring cells to a first symbol region of the predetermined symbol regions; and measuring interference of the neighboring cells using the one or more second resource elements.

Method of measuring interference

The present invention relates to a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: applying a precoding matrix indicated by the PMI, received from a terminal, in a codebook to a plurality of layers, and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for even number transmission layers can be a 2&#xd7;2 matrix containing four matrices (W1s), the matrix (W1) having rows of a number of transmission antennas and columns of half the number of transmission layers, the first and second columns of the first row in the 2&#xd7;2 matrix being multiplied by 1, the first column of the second row being multiplied by coefficient 'a' of a phase, and the first column of the second row being multiplied by '&#x2212;a'.

Signal transmission method and apparatus using codebook in wireless communication system supporting multiple antennas

A method for transmitting control information via a PUCCH in a wireless communication system and an apparatus for performing the method are provided, the method including joint-coding a plurality of pieces of control information to obtain a single code word; obtaining a first modulated symbol sequence from the single code word; obtaining a plurality of second modulated symbol sequences corresponding to each slot in the PUCCH from the first modulated symbol sequence; cyclically shifting the plurality of second modulated symbol sequences in a time domain to obtain a plurality of third modulated symbol sequences; performing a Discrete Fourier Transform (DFT) precoding process on the plurality of third modulated symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH.

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Anyang-si, South Korea

Moon Il Lee