Electronics and Telecommunications Research Institute

Hoo-Sung Lee

Seong-Su Park

Hyun-Kyu Chung

Byung-Jo Kim

Sung-Rae Cho

Kapseok Chang

Woo-Yong Lee

Yong-Sun Kim

Wooyong Lee

Sung-Woo Choi

June-Young Chang

A wide viewing angle holographic image display method and apparatus are disclosed. The wide viewing angle holographic image display apparatus includes a scan line unit and a control unit. The scan line unit includes a plurality of lateral scan lines that represent different angles, respectively. The control unit performs control so that different data are output at the respective different angles, represented by the lateral scan lines, using the plurality of lateral scan lines.

Wide viewing angle holographic image display method and apparatus

A method for generating a data frame in a wireless communication system includes generating a plurality of first headers having information about the number of segments of a payload, generating a plurality of second headers having information about a transmission mode and a length of predetermined segments among segments of the payload, generating a third header having a transmission mode and a length of remaining segments of the payload; generating a fourth header having supplementary information of the payload and error information of the supplementary information and the first to third headers or error information of the supplementary information and the third header; and generating a data frame with the first to fourth headers sequentially allocated.

Method and apparatus for generating data frame, and method and apparatus for transmitting/receiving data frame in wireless communication system

Provided is a method for controlling a low-power state in a mobile handset. The method includes shifting from an active state to a low-power idle state by blocking power of modules for a mobile communication function and decreasing a frequency of a control clock when an inactive request of the mobile communication function is received; shifting from the low-power idle state to a low-power access state by increasing the frequency of the control clock when an additional service request is received; shifting from the low-power access state to the low-power idle state if an additional service request is not received any more; shifting from the low-power idle state to a suspension state by suspending the control clock when request is not received for predetermined time; and shifting from the suspension state to the low-power idle state when the input interrupt and the timer interrupt occur.

Method for controlling low-power state in mobile handset

A method for clock synchronization between higher layers using synchronization information provided from lower layers in multi-clock communication system in which the higher layers and the lower layers use heterogeneous clocks is provided.

Method for synchronizing clocks in a communication system

there is provided a spreading apparatus using a child orthogonal variable spreading factor (OVSF) code pair, including: a channel condition information receiving unit for receiving channel condition information including a channel condition metric; a switch controlling unit for receiving the channel condition information from the channel condition information receiving unit and transferring data stream according to the received channel station information; a first spreading unit for receiving the data stream from the switching controlling unit, and spreading the data stream using a single OVSF code; and a second spreading unit for receiving the data stream from the switching controlling unit, and spreading the data stream using a child OVSF code pair.

Growing community of inventors

Daejon, South Korea

Hoo-Sung Lee