Samsung Electronics Co., Ltd.

Shuangfeng Han

Seong-Taek Hwang

David Mazzarese

Tae-young Kim

Chi-Woo Lim

Jeong-ho Park

Ho-Kyu Choi

Sang-Woo Lee

Han-Lim Lee

Jing Wang

Rakesh Taori

Hyun-Kyu Yu

Hee-Won Kang

Su-Ryong Jeong

Ming Zhao

Bruno Clerckx

Zheng Xu

Zhen Wang

Yun-Je Oh

Jae-Hoon Lee

Sang-Ho Kim

Tae-Young Kim

Hyeon-Woo Lee

Byung-jik Kim

Cheng Shan

Hoon Tae Kim

Sung-Eun Park

Mi-Hyun Lee

Eunyong Kim

Song-Nam Hong

Eun-Yong Kim

Joon-Ho Park

Jae-hun Cho

Ki-Uk Song

Clerckx Bruno

Chunhui Zhou

Zhunhui Zhou

A millimeter radio wave communication system. In a method for operating a base station (BS) in an analog/digital mixed BF system, an analog BF direction is determined. A digital BF precoder is determined for the determined analog BF direction. Digital BF precoding is performed using the digital BF precoder with respect to the determined analog BF direction. A DownLink Reference Signal (DL RS) is transmitted in the analog BF direction on which the digital BF precoding has been performed.

Method and apparatus for generating reference signal in analog/digital mixed BF system

A method provides mixed analog/digital beamforming by a transmitter in a mobile communication system. The method includes converting a modulation symbol into a parallel symbol stream, performing digital beamforming on the parallel symbol stream, performing an IFFT operation on the digital-beamformed parallel symbol stream to generate a time-domain symbol, converting the IFFT-operated time-domain symbol into a serial time-domain symbol, inserting a CP into the serial time-domain symbol, performing a DAC operation on the CP-inserted symbol to generate an analog signal, and performing analog beamforming by multiplying the analog signal by the analog beamforming precoder optimized for the first subcarrier transmitted through at least one RF channel.

Method and apparatus for mixed analog/digital beamforming

Communication methods and apparatuses in a wireless communication system are provided. Information relating to Orthogonal Frequency Division Multiplexing (OFDM) parameter sets supported by a Base Station (BS), from among a plurality of OFDM parameter sets, is transmitted to at least one Mobile Station (MS), from the BS, using a default OFDM parameter set. The BS selects at least one OFDM parameter set for the at least one MS, from among the OFDM parameter sets supported by the BS, based on one of a channel state and a mobility of the at least one MS. The BS performs data communication with the at least one MS through the at least one selected OFDM parameter set. Each of the plurality of OFDM parameter sets comprises parameter values representing a Cyclic Prefix (CP) length, a subcarrier spacing, and at least one of an Inverse Fast Fourier Transform (IFFT) size and Fast Fourier Transform (FFT) size. The default OFDM parameter set is determined based on subcarrier spacings of the plurality of OFDM parameter sets.

Communication method and apparatus in a wireless communication system supporting multiple OFDM parameter sets

A millimeter radio wave communication system. In a method for operating a base station (BS) in an analog/digital mixed BF system, an analog BF direction is determined. A digital BE precoder is determined for the determined analog BE direction. Digital BF precoding is performed using the digital BE precoder with respect to the determined analog BF direction. A DownLink Reference Signal (DL RS) is transmitted in the analog BF direction on which the digital BF precoding has been performed.

Provided is a device and a method for eliminating inter-cell interference in Multiple Input Multiple Output (MIMO) wireless communication system. The method for operating a user equipment for eliminating the inter-cell interference includes determining one or more optimum bands among bands not requested to be restricted from a neighboring cell, determining at least one of band and Precoding Matrix Index (PMI) to be requested to be restricted to the neighboring cell among the determined one or more optimum bands, and feeding back at least one of the band and PMI to be requested to be restricted to the neighboring cell to a serving base station.

Apparatus and method for eliminating inter cell interference in multiple input multiple output wireless communication system

In one embodiment, a method for network entry in a wireless communication system includes acquiring ranging code configuration information, which represents the corresponding relationship among multiple beam vectors, multiple ranging sequences, and multiple ranging channels, determining an optimal downlink beam vector, and transmitting one of the ranging sequences corresponding to the optimal downlink beam vector to a Base Station (BS) through one of the ranging channels corresponding to the optimal downlink beam vector.

Apparatus and method for network entry in a wireless communication system

A method for operating a Base Station (BS) in a wireless communication system is provided. The method comprises of receiving at least one request set for at least one neighboring cell, from at least one Mobile Station (MS), updating the at least one request set based at least in part on a serving band of each MS, and transmitting the updated at least one request set to the at least one neighboring cell, wherein the request set comprises a band and a Precoding Matrix Index (PMI) for making a use restriction or recommendation request to a neighboring cell.

Apparatus and method for mitigating inter-cell interference in multiple antenna system

A Mobile Station (MS) apparatus and a Base Station (BS) apparatus, and methods for their operation in a wireless communication system, are provided. The method for operating the MS includes receiving Precoding Matrix Index (PMI) subset information from a BS, determining downlink channel quality of the BS, determining a PMI for the BS based on the PMI subset information and the determined downlink channel quality of the BS, and transmitting the determined PMI to the BS.

Downlink PMI coordination based on base station antenna configuration

A multiple antenna system including a mobile station and a base station are operable to perform a method for transmitting control information for interference mitigation. A Mobile Station (MS) can transmit control information for interference mitigation. The MS determines a first Precoding Matrix Index (PMI) and a second PMI for interference from an adjacent Base Station (BS). Based on a correlation level from correlation values between one of the first PMI and second PMI and the remaining PMIs in the codebook, the MS determines a level of a subset of PMIs, and feeds back information indicating the correlation level.

Method and apparatus for transmitting control information for interference mitigation in multiple antenna system

A communication apparatus and method in a wireless communication system that support multiple Orthogonal Frequency Division Multiplexing (OFDM) parameter sets. A method includes determining a respective OFDM parameter set for each of multiple Radio Frequency (RF) chains; and processing an OFDM signal in each of the multiple RF chains based on a parameter value defined in the respective OFDM parameter set.

Communication method and apparatus in a wireless communication system supporting multiple OFDM parameters sets

A method and apparatus for transmitting and receiving a signal in a Near Field Communication (NFC) system are provided, in which a multi-frame is configured and a signal is transmitted in the multi-frame to a reception terminal. The multi-frame includes a discovery region, a paging region, at least two scheduling regions for indicating a plurality of different scheduling algorithms, and a traffic slot region. A transmission terminal transmits a signal for searching for a neighbor terminal in the discovery region, transmits a paging signal in the paging region, transmits information for a scheduling algorithm that is predetermined by the transmission terminal and the reception terminal in each of the scheduling regions, and transmits a scheduled signal in the traffic slot region according to the predetermined scheduling algorithm.

Apparatus and method for transmitting and receiving signal in a near field communication system

An apparatus and method for initial ranging in a wireless communication system including a heterogeneous network. An operation of a terminal includes selecting a serving cell considering a biased value of a base station applying range expansion. The operation also includes receiving ranging code classification information and threshold information associated with the serving cell. The operation further includes, if a channel quality with the serving cell is less than the threshold, selecting one a plurality of poor-expected-ranging codes indicated by the ranging code classification information, and performing initial ranging using the selected poor-expected-ranging code.

Method and apparatus for initial ranging in wireless communication system including heterogeneous network

A method and apparatus provide interference mitigation in a heterogeneous network using beamforming. In the method, a macro Mobile Station (MS) receives a broadcast message including a Precoding Matrix Index (PMI) set restricted in a macro cell, measures a Signal-to-Interference plus Noise Ratio (SINR) and a channel power from an adjacent femto Base Station (BS) and calculates a PMI, determines whether to request a dedicated frequency resource for a macro MS on the basis of the measured SINR, the channel power from the adjacent femto BS, and the calculated PMI, and requests the dedicated frequency resource for the macro MS from a macro BS.

Method and apparatus for interference mitigation in heterogeneous network using beamforming

A method for triggering multicell MIMO schemes in a multiple antenna system includes transmitting, at a Mobile Station (MS), a first feedback information for single-cell closed-loop MIMO to a Base Station (BS); requesting, at the BS, Normalized Interference Power (NIP) feedback from the MS based on the first feedback information; feeding, at the MS, the NIP back to the BS; selecting, at the BS, a first NIP threshold and a second NIP threshold based on the NIP fed back from the MS; and requesting, at the MS, one of a first MIMO scheme and a second MIMO scheme by comparing the calculated first and second NIPs with the first NIP threshold and the second NIP threshold.

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Suwon-si, South Korea

Shuangfeng Han