Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Hyo Seok Yi

Il Gyu Kim

Young Jo Ko

Hyeong Geun Park

Seung Chan Bang

Young Hoon Kim

Kap Seok Chang

Chan Bok Jeong

Moon Sik Lee

Kapseok Chang

Young-Hoon Kim

Kyoung Joon Lee

Seung-Chan Bang

The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.

Generating downlink frame and searching for cell

A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, each cell group including at least two cells, includes: detecting a primary synchronization signal and a secondary synchronization signal from a received signal; and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Cell search method, forward link frame transmission method, apparatus using the same and forward link frame structure

The present invention relates to a method for generating a downlink frame including generating a first short sequence and a second short sequence indicating cell group information, generating a first scrambling sequence determined by the first synchronization signal, generating a second scrambling sequence determined by the first short sequence, scrambling the first short sequence with the first scrambling sequence, scrambling the second short sequence with at least the second scrambling sequence, and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain.

A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

A method is provided for searching for a cell in a mobile station. The method includes receiving a downlink frame including a primary synchronization signal and a secondary synchronization signal. The secondary synchronization signal contains cell identity group information and the primary synchronization signal contains cell identity information within a cell identity group. The method also includes searching for a cell using the cell identity group information in the secondary synchronization signal and the cell identity information in the primary synchronization sign.

Growing community of inventors

Daejeon, South Korea

Hyo Seok Yi