Samsung Electronics Co., Ltd.

Yonsei University

Korea National University of Transportation Industry-Academic Cooperation Foundation

Industry-academic Cooperation Foundation, Korea National University of Transportation

Industry-academic Cooperation Foundation, Korean National University of Transportation

Chungju National University Industry-academic Cooperation Foundation

Electronics and Telecommunications Research Institute

Industrial Cooperation Foundation, Korea National University of Transportation

Cheol Mun

Youn-Sun Kim

Hwan-Joon Kwon

Jin-Kyu Han

Dong-Hee Kim

Jin Kyu Han

Dae-Gyun Kim

Juho Lee

In Ho Lee

Yu-Chul Kim

Younsun Kim

Hyojin Lee

Joonyoung Cho

Sung Tae Kim

Ju Ho Lee

Hyoungju Ji

Soon-Young Yoon

Joon Young Cho

Youn Sun Kim

Kiil Kim

Sang-Woo Lee

Hyoung-Ju Ji

Hyo-Jin Lee

June Moon

Jun Ho Lee

Ki-Young Han

Ki Il Kim

Hyo Jin Lee

Jong Gwan Yook

Jong Kwan Yook

Jae Ick Choi

Byoung-Ha Yi

Soon Ik Jeon

Jin-Weon Chang

Soon Young Eom

Young Jun Chong

Jae-Yun Ko

Myoung-Won Lee

Han-Kyu Park

Hee-Jin Jung

The present disclosure relates a method and apparatus for determining a path of an autonomous driving vehicle considering a communication network load. The method may include: (a) a step of transmitting global path information of all paths from a start point to a destination of a vehicle and vehicle identification (ID) information to a control server; (b) a step of receiving arrival time estimation information of the vehicle at at least one node on the all paths and wireless resource use rate information of at least one vehicle including the vehicle at each of the at least one node from the control server; (c) a step of determining a final movement path of the vehicle of the all paths on the basis of the arrival time estimation information and the wireless resource use rate; and (c) a step of performing autonomous driving along the determined final movement path.

Method and apparatus for determining a path of an autonomous driving vehicle considering communication network load

Provided are a method and apparatus for performing wireless communication through channel state prediction using a local dynamic map. The method may include (a) receiving probe node data (PND) of a base station node and a mobile node, (b) generating local dynamic map (LDM) information including communication network information between the base station node and the mobile node using the probe node data, and (c) transmitting the LDM information to the base station node and the mobile node, wherein the LDM information may be used to select a transmission beam of the base station node and a reception beam of the mobile node corresponding to the transmission beam or a reception beam of the base station node and a transmission beam of the mobile node corresponding to the reception beam.

Method and apparatus for performing wireless communication through channel state prediction using local dynamic map

A method and an apparatus are provided for transmitting channel state information (CSI) by a terminal in a communication system. The method includes receiving a first signal from a first serving cell; receiving a second signal from a second serving cell; calculating first CSI for the first serving cell based on the first signal; calculating second CSI for the first serving cell based on the first signal; calculating first CSI for the second serving cell based on the second signal; calculating second CSI for the second serving cell based on the second signal; transmitting the first CSI and the second CSI for the first serving cell respectively; and transmitting the first CSI and the second CSI for the second serving cell respectively.

Method and apparatus for sending and receiving channel state information in multiple-input multiple-output network wireless communication systems

The present invention proposes an apparatus and a method capable of forming M*N number of beams by a base station, which supports signal transmission/reception of the macro service area in heterogeneous networks in which a macro service area is formed with the M*N number of beams through a two-dimensional arrangement simultaneously considering the horizontal dimension and the vertical dimension and at least one small service is formed in the macro service area. To this end, at least one interference prediction beam formed to transmit signals interfering in transmission signals in at least one small service area from among the signals to be transmitted by the M*N number of beams is selected, and each of the M*N number of beams is formed in consideration of the inter-cell interference in at least one small service area due to the signals to be transmitted by at least one selected interference prediction beam.

Apparatus and method for forming beam in wireless communication system

An apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas are provided. A receiver estimates a fading channel of received data, selects a weight set relative to a maximum data transmission rate from at least one weight set with elements of a plurality of orthogonal weight vectors, and transmits feedback information including the selected weight set and channel-by-channel state information to a transmitter. The transmitter demultiplexes data to be transmitted on a basis of the feedback information into at least one sub-data stream, multiplies each sub-data stream by an associated weight, and transmits the data.

Apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas

The present invention proposes a hybrid spatial multiplexing (SM) and a space division multiple access (SDMA) technique in a frequency division duplex (FDD) massive multiple-input multiple output (MIMO) system using a two-dimensional planar array antenna, which effectively transmits a channel state information reference signal (CSI-RS) for estimating a downlink two-dimensional space channel using only a limited amount of downlink radio resources, and optimally selects and performs the SM and SDMA techniques in a two-dimensional space channel. To this end, the present invention proposes a technique which defines space resource blocks (SRB) by grouping space elements (SE) having a high spatial correlation between downlink channels in the horizontal dimension and corresponding SEs thereof in the vertical dimension, and transmits CSI-RSs for estimating channels in vertical dimension SEs corresponding to one selected horizontal SE in each SRB every transmit time interval (TTI). The present invention proposes a technique wherein user equipment (UE) estimates the spatial correlation between channels of different horizontal dimension SEs belonging to the same SRB received in different TTIs and the spatial correlation between channels of horizontal dimension SEs belonging to different SRBs received in the same TTI, and feeds information for changing the size of SRB of the corresponding UE to an optimal size back to eNodeB. The present invention proposes a technique wherein the UE estimates downlink channels through CSI-RSs transmitted from each SRB, and each UE feeds an index of a preferred SRB, a rank of the corresponding SRB in the vertical dimension, and channel quality information (CQI) back to eNodeB. When each UE determines the rank, it is possible to transmit the ranks to the fullest extent in the vertical dimension and only a single rank from each SRB in the horizontal dimension.

Method and device for transmitting channel state information reference signal, hybrid spatial division multiplexing, and space division multiple access in wireless communication system using two-dimensional planar array antenna

Methods and apparatus are provided for beamforming and information feedback are provided. Signals for beams to be transmitted through corresponding antenna ports, are generated. The beams are formed by precoding the signals with beamforming vectors. The beams are sorted into a number of resource reuse groups based on a resource that is to be shared. The beams are transmitted, using resources allocated per group, to a receiver. Feedback information is generated on at least one antenna port, based on the received beams. The feedback information is transmitted to the transmitter. A beam is selected having a greatest gain for a transmitter using the feedback information. A transmission resource is allocated for the selected beam.

Method and apparatus for transmitting/receiving CSI-RS operating in massive MIMO system FDD mode

A Channel State Information (CSI) feedback method and apparatus is provided for transmitting, at a base station, the CSIs for plural transmit antennas with a limited amount resource and receiving, at a mobile station, the CSIs efficiently in a massive Multiple Input Multiple Output (MIMO) system operating in the Frequency Division Duplex (FDD) mode.

Channel state information feedback apparatus and method in wireless communication system operating in FDD mode

A method and an apparatus for sending and receiving channel state information in network Multiple-Input Multiple-Output (MIMO) wireless communication systems are provided. Hybrid feedback technology is provided to transfer complete Channel State Information (CSI) to a transmitter by efficiently combining limited amounts of long-term channel information and short-term channel information are In a down link MIMO network system.

Feedback methods and apparatuses are provided for efficiently feeding back downlink Channel State Information (CSI) using limited information in a DAS-based wireless communication system. A method includes determining, by a receiver, a candidate Antenna Port (AP) set from among a plurality of APs; selecting an active AP set from the candidate AP set; and transmitting the candidate AP set, the active AP set, and the downlink CSI of active APs included in the active AP set.

Method and apparatus for feedback of channel state information in a distributed antenna system (DAS)&#x2014; based wireless communication system

A scheduling method in a wireless communication includes receiving a Channel Quality Indicator (CQI) from a plurality of terminals. The method also includes determining an average transmission rate of each terminal based on the CQI by approximating an instantaneous transmission rate distribution to a Gaussian distribution. The method further includes determining a weight of each terminal such that the average transmission rate of each terminal satisfies a target transmission rate. The method also includes selecting a terminal set by applying the determined weight. Thus, it is possible to control the fairness between the terminals and to efficiently control the transmission rate of the terminals according to the required transmission rate and the channel environment of the terminals.

Scheduling method and apparatus for control average transmission rate in multiple antenna system

A wireless communication method and apparatus using adaptive transmission polarization control are provided. The wireless communication apparatus includes an orthogonal polarization antenna, a channel state estimator, and a transmission polarization state (TPS) selector. The orthogonal polarization antenna receives at least one reference signal. The channel state estimator estimates a wireless polarization channel on the basis of the reference signal. The TPS selector selects a TPS corresponding to the estimated wireless polarization channel from among a plurality of predefined TPSs, and feeds back the selected TPS information. Accordingly, the wireless communication apparatus feeds back information for polarization control using minimum uplink wireless resources, and maximizes a transmission capacity on the basis of the feedback information.

Wireless communication method and apparatus using adaptive transmission polarization control

A transmission method and apparatus utilizing Multiple-Input and Multiple-Output (MIMO) precoding based on Distributed Antenna Systems (DASs) are provided. The transmission method includes determining active antenna ports, for a User Equipment (UE) having multiple receive antennas, from among a plurality of Distributed Antenna Ports (DAPs) evenly placed in a service area; assigning a Multiple-Input and Multiple-Output (MIMO) mode to the UE and notifying the UE of the MIMO mode assignment; determining a signal precoding vector on a basis of feedback information for the MIMO mode received from the UE; and precoding a signal using the signal precoding vector and transmitting the precoded signal through the active antenna ports.

Method and apparatus for downlink transmission based on MIMO precoding in wireless communication system employing distributed antenna systems

A channel condition information feedback method and apparatus are provided for a collaborative wireless communication network using a multiple input multiple output antenna system. The apparatus includes a downlink channel estimator that estimates channels of adjacent base stations, groups base stations from among the adjacent base stations that are capable of collaborative communication, and obtains a maximum singular vector to base stations belonged to a same group; and a vector selector which selects a weight vector most accurately representing the maximum singular vector and a complex variable most accurately representing the maximum singular vector in combination with the weight vector.

Data transmission method and apparatus based on joint space division multiple access technology in collaborative downlink MIMO system

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Gyeonggi-do, South Korea

Cheol Mun