Samsung Electronics Co., Ltd.

Industry-University Cooperation Foundation Sogang University

Seung-won Kang

Soon-Young Yoon

June Moon

Sung-woo Park

Ho-Joong Kwon

Keun-Chul Hwang

Jae-Yun Ko

Sung-Ho Lee

Ji-Won Lee

Sung-Woo Park

Chung-Ryul Chang

Won-Jin Sung

Hag-do Kim

Eui-han Yoon

Byung-Seok Lee

A speaker is provided. The speaker includes a sound output unit comprising sound output circuitry having a sound emission hole disposed at one side, a sound reflector disposed at a lower side of the sound output unit and being spaced apart from the sound output unit, the sound reflector having a convex form upper side, and a support having one end fixed to the sound reflector and another end rotatably supporting the sound output unit, wherein the sound output unit is positioned in one of a first posture in which the sound emission hole faces the upper side of the sound reflector and a second posture in which the sound emission hole does not face the upper side of the sound reflector.

Speaker and operation method thereof

A method and an apparatus maximize the capacity of a wireless communication network by taking into consideration inter-cell interference coordination. A home cell's capacity sensitivity to interference is calculated. At least one neighbor cell's capacity sensitivity to interference is collected. And at least one UE located in the home cell is scheduled based on the home cell's capacity sensitivity and the neighbor cell's capacity sensitivity. Accordingly, it is possible to achieve power and allocation control to maximize the capacity of the overall network including neighbor cells increase the system capacity in a cellular system in which inter-cell interference is large, and adaptively perform a UE scheduling in real time to changing distribution of UEs because information on a change in the capacity of each cell is shared by periods.

User equipment scheduling method in cellular uplink communication system and base station apparatus therefor

An apparatus is operable to control power of a base station in a distributed Multiple Input Multiple Output (MIMO) wireless communication system. At least one beamforming matrix is used for processing transmission signals to terminals included in a terminal set for a multiple access is determined. Minimum power values required for satisfying a minimum transmission rate of the terminals are determined. Whether optimum power values exist is determined using the minimum power values, the beamforming matrix, and a limit transmission power of the base station. When the optimum power values exist, transmission power values for respective terminals are determined in a range meeting the limit transmission power of the base station.

Apparatus and method for controlling power in distributed multiple input multiple output wireless communication system

A method and an apparatus for pre-scheduling in a closed-loop multiple user multiple input multiple output (MU-MIMO) antenna system. A base station receives channel information representing a downlink channel condition of each mobile station from mobile stations in a cell, and determines a candidate user group for each of frequency bands included in an entire frequency band, based on the channel information, the candidate user group including mobile stations to which resources can be simultaneously allocated. The base station also instructs a mobile station included in each candidate user group to transmit a sounding signal through a corresponding frequency band. If the sounding signal is received through the corresponding frequency band, the base station performs a scheduling with regard to the mobile station included in each candidate user group.

Method and apparatus for pre-scheduling in closed-loop MU-MIMO antenna system

A method and apparatus for controlling inter-cell interference in an evolved Node-B for a cellular communication system with a frequency reuse factor of 1 are provided. The apparatus includes a bitmap generator for receiving scheduling information from evolved Node-Bs of a plurality of neighbor cells, and for generating scheduling information including its cell's bitmap information for the resource allocation using the received neighbor cells' scheduling information, and a scheduler for scheduling the resource allocation for UEs in its cell based on the scheduling information provided from the bitmap generator and power allocation information of the UEs in its cell.

Method and apparatus for scheduling resource allocation to control inter-cell interference in a cellular communication system, and base station thereof

An apparatus and method for allocating a channel and power by a Base Station (BS) in a communication system are provided. The method includes, performing one of a first scheduling, which uses inter-cell cooperation information received from at least one neighboring BS and a data rate received from each User Equipment (UE), and a second scheduling, which uses both an average data rate for each subchannel computed by accumulating the data rates for a preset time period and the inter-cell cooperation information, selecting a UE to be allocated each subchannel in each subframe based on results of the performed scheduling, computing a power metric for each of the selected UE and a non-selected UE by using the inter-cell cooperation information, the average data rate, an amount of performance change of the selected UE, and the results of the performed scheduling; and allocating power to all UEs including the selected UE and the non-selected UE by preset subframe periods by using the computed power metric.

Apparatus and method for allocating channel and power in communication system

A speaker includes a speaker body; a cone paper movably supported by the speaker body; and a magnetic driving unit disposed on the speaker body to vibrate the cone paper, wherein the cone paper includes at least two layers made of different materials.

Speaker

Provided is a semiconductor device in which a resistor and a capacitor are inserted in an input/output signal line that connects an input/output pad and an internal circuit at an input/output terminal in order to prevent damage of the internal circuit due to static electricity. The semiconductor device includes the input/output signal line that connects the input/output pad and the internal circuit. A first electrostatic discharge (ESD) protection circuit is branched from the input/output pad and connected to a power supply line, and a second ESD protection circuit is branched from the input/output pad and connected to a ground line. The resistor is located in the input/output signal line, and the capacitor is branched from the power supply line between the power supply line and the resistor.

Growing community of inventors

Suwon-si, South Korea

Seung-won Kang