Samsung Electronics Co., Ltd.

Seoul National University

Jin-Woo Yang

Jae-Jin Shin

Ju-Yong Lee

Sung-Hyuk Byun

Dan-keun Sung

Jeong-Won Heo

Kyung-geun Lee

Sung-hyun Choi

Jung-hyeon Kim

Sang-Yeon Won

Seong-won Kim

Chul-Hoon Hwang

Kyung-Geun Lee

Ji-Woo Jeong

Yeon-Chul Shin

Seo-Min Yang

Seung-Min Yoo

Jae-Nam Lee

Ju-II Kang

A method and an apparatus for performing transmission power selection of a wireless access device and channel allocation in a combination manner, for resource management optimized for a wireless network environment supporting multimedia traffic are provided. In a method for managing a radio resource of at least one Access Point (AP) in a wireless communication network, a transmission power select operation for the AP is performed on each of a plurality of channel settings, and a network performance value is predicted. Optimized channel setting is selected among the plurality of channel settings depending on the predicted network performance value. The optimized channel setting and optimized transmission power corresponding to the optimized channel setting are allocated to the AP.

Method and apparatus for managing radio resource in wireless communication system

In a Wireless Local Area Network (WLAN) and a method of transmitting a frame in the WLAN, mode information and an available data transfer rate of each wireless terminal located within a coverage of an Access Point (AP) are collected. A determination is made as to whether or not the AP transmits a Clear To Send (CTS) frame depending upon an existence of wireless terminals corresponding to the collected mode information before the AP transmits a data frame to at least one wireless terminal. A data transfer rate of the CTS frame is adjusted based on the collected available data transfer rate of each of the wireless terminals to transmit the CTS frame at the adjusted data transfer rate. Therefore, both the stability and the bandwidth effectiveness may be enhanced.

Wireless local area network (WLAN) and method of transmitting frame in the WLAN

A burn-in board connection device includes a first connection unit to hold a burn-in board and move in a first direction perpendicular to the burn-in board that is inserted in a chamber of a burn-in test device, a second connection unit to move in a second direction parallel to the burn-in board to attach/detach the burn-in board that is held by the first connection unit to/from a connector disposed in the chamber. A burn-in board connection method includes coupling a finger to the burn-in board by moving the finger in a first direction, attaching the burn-in board to a connector by moving the finger in a second direction, and driving the finger by converting a rotation of a servo motor into a linear movement of the finger.

Burn-in board connection device and method

An ATM switch having the buffer threshold controller to control the cell input into the switching element using the back-pressure signal and a method for determining the buffer threshold according to the buffer threshold controller are disclosed. The ATM switch includes buffer pool storing the cell input to the switch; buffer pool control part storing the buffer pool occupancy information per input port of the buffer pool; threshold control part receiving the buffer pool occupancy information from the buffer pool control part and calculating the threshold per input port periodically and then sending it to the buffer pool control part; input crosspoint control part controlling the cells input to the buffer pool by receiving the control signal from the buffer pool control part; and output crosspoint control part controlling the cells output from the buffer pool by receiving the control signal from the buffer pool control part. The method includes the steps of calculating r , the buffer pool occupancy rate of the ith input port (i&equals;1, 2, 3, . . . , N); calculating r , the threshold of the buffer pool occupancy rate of the ith input port; calculating L , the number of occupation of the cells in the buffer pool of the ith input port; calculating the difference, D &equals;t &minus;L (k&equals;1, 2, 3, N . . . , N) between t , the threshold of the jth input port and L , the number of cells stored in the buffer pool, where i&ne;j (j&equals;1, 2, 3, . . . , N); calculating t , the threshold in case where the t &minus;L is the kth value in descending order from the N input ports; calculating b , minimum threshold to guarantee the minimum cell input; and comparing &Dgr;, the minimum unit of increase or decrease of the threshold and the value of t &minus;b .

ATM switch and a method for determining buffer threshold

A controller for the logical buffer depth in ATM switching system and a method for determining the logical queue depth, using the back-pressure signal and the occupied buffer depth information and supporting the P classes, are disclosed. The controller includes Routing Table Element making tag for routing of input cell; Input Buffer storing the cell that a tag is attached to in said routing table element; Switch fabric that reads the cell from said input buffer and then switches it to the output port; and Input buffer controller controlling the logical queue size in said input buffer. And the method for determining the logical queue depth includes the steps of calculating the back-pressure signal occurrence rate b,of the ith class; calculating the back-pressure signal occurrence threshold rate b,of the ith class; calculating the buffer depth T,of the logical queue of the ith class; calculating threshold values T,T,of the two buffer depths of the ith class; calculating the buffer size L,of the logical queue of the ith class; calculating the empty area size D,(j&equals;1, 2, 3, L, P) of logical queues for the number of p classes.

Input buffer controller using back-pressure signals in ATM switches and a method for determining the logical queue size

Growing community of inventors

Gyeonggi-do, South Korea

Jin-Woo Yang