Samsung Electronics Co., Ltd.

Seoul National University

Korea University Research and Business Foundation

In-Seok Hwang

Soon-Young Yoon

Jae-Hee Cho

Hoon Huh

Sang-Hoon Sung

June Moon

Jang-Hoon Yang

Jae-Ho Jeon

Hee-Kwun Cho

Kwan-Hee Roh

Byoung-Ha Yi

Chung-Ryul Chang

Ki-Young Han

Seung-Joo Maeng

Young-Hoon Kwon

Yong-Seok Kim

Keun-Chul Hwang

Min-hee Cho

Sung-Joon Park

Kyung-Joo Suh

Bong-Gee Song

Byoung-Joo Kim

Hyon-Goo Kang

Jae-Hwan Chang

Jae-Weon Cho

Ji-Yun Seol

Sung-woo Park

Sung-Ho Lee

Jin-Sung Kim

Won-Il Roh

Inkyu Lee

Byung-Ki Kim

Jun Young Heo

Chung-Gu Kang

Sung-Woo Park

Min-Hee Cho

Jeong-Heon Kim

Heon-Ki Chae

Jin-Kwan Jung

Ji-Ho Jang

Joon-Su Ji

Ho-Yeol Lee

Dong-Oh Hwang

Jee-Hyun Kim

Yon-Woo Yoon

Byoung-Gi Jang

Eun-Sun Choi

In-Taek Lee

Soung-Joo Maeng

Joong-Ho Jeong

Jae-Hyok Lee

Sung-hyun Choi

Jae-Woo So

Sang-Do Lee

Do-Yun Kim

Kwang-Sik Kim

Won-Kyun Suk

Kwang-Hoon Han

Doo-Seon Lee

Sang-Boo Kang

Young-Kyu Choi

Soo-Min Byun

Dong-Myung Kim

Sei-Jei Cho

Young-Kyo Ro

Hyung-Koo Kim

Jing Li

Min-Soo Na

Eun-Sun Cho

Jao-Ho Jeon

Sang-Hoon No 721-1404 Hyundae Apt Sung

Young-Hoon No 502-1301 Kwon

Joong-Hoo Jeong

An apparatus and method for reducing the volume of a resource allocation information message in a broadband wireless communication system are provided. The method includes transmitting a message including information indicating a periodicity of an uplink control channel for an initial network entry; and receiving an uplink signal for the initial network entry through the uplink control channel.

Apparatus and method for reducing volume of resource allocation information message in a broadband wireless communication system

A method for controlling power in a communication system is disclosed. The power control method includes the steps of calculating a first offset according to traffic information of a mobile station and data transmission channel quality information of the mobile station, determining a second offset according to received channel quality information of the mobile station, received from the mobile station, determining a third offset according to interference information received from other base stations neighboring the base station, and transmitting, to the mobile station, power control information determined based on the first offset, the second offset and the third offset.

Method and system for controlling power in a communication system

Disclosed is a method for uplink power control in a communication system that includes determining a power control offset for controlling power for traffic to be transmitted by a subscriber station, according to whether a Hybrid Automatic Repeat reQuest (HARQ) is applied to the traffic, and transmitting the power control offset to the subscriber station.

Method and apparatus for uplink power control in communication system

Provided is an apparatus and method for managing a neighbor list in a broadband wireless communication system. In the method, a user terminal generates a CINR list through initial cell scanning to transmit the generated CINR list to a base station. The base station transmits the CINR list to a server. The server updates a neighbor list of the base station on the basis of the CINR list.

Apparatus and method for managing neighbor list in broadband wireless communication system

A method of cleaning needles of a probe card in a test system includes mounting the probe card, which has a plurality of device under tests (DUTs) and needles, in a card mounting part. The DUTs and needles are scanned using a camera positioned in the test system to provide a scan result. A laser beam is focused on at least one of the needles based on the scan result and the laser beam is irradiated on the at least one of the needles to clean the at least one of the needles.

Methods and systems for cleaning needles of a probe card

An apparatus and method for reducing the volume of a resource allocation information message in a broadband wireless communication system are provided, in which a scheduler determines whether to generate uplink control region allocation information, and a generator generates the uplink control region allocation information according to a result of the determination.

An apparatus and method for transmitting in a multi-user multi-antenna system are provided. The apparatus includes a precoder for orthogonalizing a channel by removing a channel element of a corresponding terminal with respect to multiple terminals, for determining an effective channel of each terminal by decomposing the orthogonalized channel using Singular Value Decomposition (SVD), for determining a precoding matrix using the effective channel, and for mapping data streams of the multiple terminals to a plurality of transmit antennas using the precoding matrix, and the plurality of the transmit antennas for transmitting the data streams of the multiple terminals. Hence, it is possible to obtain an iteration algorithm performance requiring considerable computation while avoiding complexity and reducing computation.

Apparatus and method for precoding using channel orthogonalization in multi-user multi-antenna system

An apparatus and method for dynamic frequency assignment to a low-power Base Station (BS) in a wireless communication system are provided. The method includes receiving a Received Signal Strength Indication (RSSI) measurement result for the whole Frequency Assignment (FA) and an available FA set of the BS from the BS newly entering a network, selecting an FA having a minimum RSSI among FAs included in the available FA set, and assigning the FA having the minimum RSSI to the BS.

Apparatus and method for dynamic frequency assignment in a wireless communication system

An apparatus and method for setting transmit power of a compact Base Station (BS) in a wireless communication system are provided. In the apparatus and method a measurer measures a signal strength corresponding to each of one or more neighbor BSs while operating in a Mobile Station (MS) mode, a receiver receives a signal strength corresponding to each of the one or more neighbor BSs measured by one or more MSs from the corresponding one or more MSs, and a self-configuration controller sets a target signal strength based on the signal strength corresponding to each of the one or more neighbor BSs measured in the MS mode and controls a transmit power so that the signal strength corresponding to each of the one or more neighbor BSs measured by the one or more MSs substantially reaches the target signal strength.

Apparatus and method for setting transmit power of a compact base station in a wireless communication system

Control information communicating apparatus and method in Broadband Wireless Access (BWA) system are provided. A Base Station (BS) includes a manager for managing UL control region allocation information of adjacent BSs; a scheduler for scheduling resources and controlling periodic transmission of UL control region allocation information when a UL control region of the BS is the same as UL control regions of the adjacent BSs; and a control information generator for periodically generating the UL control region allocation information under the control of the scheduler.

Apparatus and method for communicating control information in broadband wireless access (BWA) system

In a communication system, a base station transmits a message including neighbor base station information to a mobile station, wherein neighbor base stations in the base station include m first type neighbor base stations and n second type neighbor base stations, the message includes an identifier dedicatedly allocated to the mobile station when the mobile station can get a service from one of the n second type neighbor base stations, the first type is different from the second type, the neighbor base station information includes information on the n second type neighbor base stations, and each of m and n is an integer identical to or greater than 1.

System and method for transmitting/receiving neighbor BS information in a communication system

An apparatus and operation method of a Mobile Station (MS) for ranging in a broadband wireless access communication system includes receiving information for ranging code hopping from a Base Station (BS). The MS determines a hopping offset value that is a start of a ranging codes group using the information for ranging code hopping. The MS also determines a ranging codes group using the hopping offset value, and randomly selects at least one or more ranging codes among the determined ranging codes group and transmitting the selected ranging codes to the BS.

Method and apparatus for ranging in broadband wireless access communication system

A terminal is capable of transmitting an orthogonal sequence in a broadband wireless communication system. Operations of a transmitting end include generating a sequence corresponding to sequence allocation information of the transmitting end among a plurality of candidate sequences; generating a signal string corresponding to the sequence; and transmitting the signal string over a channel defined for transmission of the signal string.

Apparatus and method for transmitting and receiving uplink sounding signal in broadband wireless communication system

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Seoul, South Korea

In-Seok Hwang