Korea Advanced Institute of Science and Technology

Lg Electronics Inc.

Sungkyunkwan University

Kyungrak Son

Wan Gyun Choi

Hanbyul Seo

Dongin Kim

Bi Hong

Yong Kim

Disclosed are a multi-antenna system and a transmission and method based on index coding and beamforming thereof. A transmitter including a plurality of antennas may be configured to classify a plurality of receivers into at least one group, determine an index code for the group, design a beamforming matrix for the group, and transmit at least one of a plurality of files to the group through the antennas based on the index code and the beamforming matrix.

Multi-antenna system, and transmitting apparatus and method based on index coding and beamforming thereof

A method for transmitting downlink data in a multicast scheme by a base station in a wireless communication system is disclosed. The method includes receiving a first request signal requesting first data from a first user equipment (UE), receiving a second request signal requesting second data from a second UE, generating a transmission message by applying an exclusive OR (XOR) operation to the first data and the second data, and transmitting the transmission message to the first UE and the second UE in the multicast scheme.

Method and apparatus for index-coded multicast transmission in a wireless communication system

A method for transmitting downlink data from a BS in a wireless communication system is disclosed. The method comprises receiving a first request signal of the downlink data from a first UE at a first timing point; transmitting packet of the downlink data to the first UE by using a unicast scheme until a multicast preparation time period passes from the first timing point; receiving a second request signal of the downlink data from a second UE at a second timing point after the first timing point; transmitting packet of the downlink data to the second UE by using the unicast scheme until the multicast preparation time period passes from the second timing point; and transmitting packet of the downlink data to a multicast group, which includes the first UE and the second UE, by using a multicast scheme when the multicast preparation time period passes.

Method for multicast transmission based on asynchronous request in wireless communication system and apparatus for the same

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Seoul, South Korea

Kyungrak Son