Samsung Electronics Co., Ltd.

Seoul National University

Veebeam Corporation

Seung-young Park

Sang-Boh Yun

Yong-suk Kim

Yeon-Woo Lee

Yung-Soo Kim

Sung-hyun Cho

Mi-Sun Do

Neung-Hyung Lee

Won-Hyoung Park

Torbjorn Larsson

Sae-Woong Bahk

Wan-Jin Kim

Ye-Hoon Lee

Woo-Kyung Lee

Young-June Choi

Roberto Aiello

A TFI-OFDM transmission system for a UWB communication that includes a data generator generating data having a rate corresponding to a transmission speed mode, a convolutional encoder convolutional-encoding the data into a certain number of data groups, an OFDM modulator outputting OFDM symbols by executing an IFFT the data groups a buffer temporarily storing the OFDM symbols to sequentially transmit the OFDM symbols in a time domain at least two times, and a frequency generator generating certain frequencies to transmit the OFDM symbols in a certain number of frequency bands corresponding to transmission channels.

TFI-OFDM transmission/reception systems for UWB communication and methods thereof for mitigating interference from simultaneously operating piconets

In an orthogonal frequency division multiplexing (OFDM) mobile communication system, an apparatus and method allocates resources for data transmission and transmits/receives user data using the allocated resources. A full subcarrier band allocable for one cell is divided into a plurality of subcarrier regions. Subcarriers selected from subcarriers existing in one of the plurality of subcarrier regions are allocated for each of a plurality of sectors constituting the cell. The subcarriers are allocated such that subcarriers existing in different subcarrier regions are allocated for neighboring sectors in the cell.

Method for allocating resources in a multicarrier system and transmission apparatus using the same

An enhanced hybrid duplexing technology (EDHT)-based communication method including dividing a cell prescribed by a transmission power of the base station into at least two logical areas, dividing the system frequency band into at least two subbands, and communicating in different duplexing modes using at least one of the subbands according to a position of the terminal within the cell. According to the method, a flexible resource management is possible according to the communication environment by dividing an entire system band into at least two subbands, differentiating the bandwidths of the subbands and the duplexing techniques, and selecting and allocating the resources of the subbands according to the position of the terminal within the cell.

Cellular communication method based on enhanced hybrid duplexing technology

A signal reception apparatus and method for communication systems. The signal reception apparatus for communication systems according to the present invention is applicable to communication environments in which a plurality of sub-bands having different frequency bands are sequentially used for communications. An embodiment of the invention has a multi-band index generation unit, a multi-band frequency generation unit, a multiplication unit, a correlation signal reception unit, and a buffer unit. The multi-band index generation unit generates a multi-band index corresponding to a sub-band to which a received signal is transmitted in correspondence with the multi-band index. The multiplication unit outputs a signal obtained by multiplying the received signal by the multi-band frequency. The correlation signal reception unit integrates and outputs the signal of the multiplication unit based on an integral time set in correspondence with the multi-band index. Further, the buffer unit buffers the signal of the correlation signal reception unit to be outputted at a predetermined data rate.

Signal reception apparatus and method for multi-band ultra-wideband communication systems

Disclosed is a handover method for an IP-based next generation mobile communication system. With a handover method including 1) determining whether or not a predetermined mobile terminal goes into the overlapping area; 2) starting a Layer(L) handover operation between the neighboring access routers as the mobile terminal goes into the overlapping area; 3) if the Layerhandover operation between the neighboring access routers is completed, establishing a data path for the mobile terminal to pass through an access router after the Layerhandover; 4) if the mobile terminal leaves a cell area including the mobile terminal in steps 2) and 3), performing by the mobile terminal Layerhandover between cells and receiving by the mobile terminal data through a cell base station after the Layerhandover and an access router before the Layerhandover; and 5) if the mobile terminal leaves a cell area including the mobile terminal after step 3), performing by the mobile terminal Layerhandover between cells and receiving by the mobile terminal data through a cell base station after the Layerhandover and an access router after the Layerhandover.

Handover method for next generation mobile communication system having overlapping area

Growing community of inventors

Seoul, South Korea

Seung-young Park