Korea Advanced Institute of Science and Technology

Samsung Electronics Co., Ltd.

Bang Chul Jung

Dong Won Lee

Tak Ki Yu

Jong Hyung Kwun

Chan Ho Min

Young Hyun Jeon

Hyu Dae Kim

A communication device includes an RF receiver that receives a combined signal including a first signal transmitted from a first node and a second signal transmitted from a second node, a channel estimator that estimates first channel information of the first signal and second channel information of the second signal, respectively, a multiuser detector that detects original signal values of the combined signal using the estimated first and second channel information and an RF transmitter that transmits a signal generated based on the values detected by the multiuser detector to the first node and the second node during a predetermined period.

Signaling in wireless communication systems

The invention relates to a data transfer method in a multi-hop relay system. The data transfer method comprises: a step for allowing a base station to receive from a first terminal the channel information (H) between the base station and the first mobile station, a step for making the base station generate an interference cancellation precoding matrix using H, a step for forcing the base station to transfer first data to a relay station, and a step for making the relay station transfer the first data to the first mobile station and forcing the base station to transfer second data to a second mobile station, wherein the second data is converted using the interference cancellation precoding matrix. According to the disclosed data transfer method in the multi-hope relay system, the base station transfers data to another mobile station efficiently when the relay station transfers data to a mobile station. Therefore, the data transfer method is able to efficiently use the resources wasted in an existing data transfer method and improve the total data transmission rate of the base station.

Data transfer method, data transmission apparatus, and communication system in multi-hop relay system

Growing community of inventors

Daejeon, South Korea

Bang Chul Jung