Samsung Electronics Co., Ltd.

Chang-Hun Bae

Hwan-Joon Kwon

Ho-Kyu Choi

Young-Kwon Cho

Woo-Sang Hong

Youn-Sun Kim

Jae-Sung Jang

A base station PDCCH (Packet Data Control Channel) apparatus for scrambling transmission packet data to prevent other terminals from recognizing the transmission packet data in a base station including a packet data channel device for transmitting packet data to a terminal and a packet data control channel device for transmitting control information needed for demodulation of the packet data to the terminal. In the apparatus, an encoder encodes the control information and generates a coded control information stream comprised of a stream of a plurality of bits. A scrambler generates a scrambling sequence using unique information known to only the terminal and the base station, and scrambles the coded control information stream with the scrambling sequence.

Apparatus and method for scrambling a packet data channel and a packet data control channel in a mobile communication system for high-speed packet transmission

A base station transmission apparatus for transmitting MAC (Medium Access Control) ID (Identification) information indicating a terminal to receive transmission packet data and length information of the transmission packet data in a mobile communication system for high-speed packet transmission, having an encoder for encoding a bit stream indicating the MAC ID information and generating coded symbols; a Walsh cover section for Walsh-covering the coded symbols from the encoder with a Walsh code based on the length information; and a Walsh spreader for spreading the Walsh-covered symbols from the Walsh cover section with a predetermined Walsh code.

Apparatus and method for communicating packet data control channel in a mobile communication system

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Seoul, South Korea

Chang-Hun Bae