Method and device for performing coordinated precoding in wireless access system

摘要

The present invention discloses a method and device for performing coordinated precoding in a wireless access system. In particular, the present invention includes: transmitting, to a base station, a measurement result of a plurality of interference signals by a terminal, the plurality of interference signals being transmitted from a plurality of adjacent base stations; receiving quasi-orthogonal CDM (Q-CDM) code information from the base station by the terminal in order to remove some of the plurality of interference signals, the Q-CDM code information being determined by the base station and the plurality of adjacent base stations; transmitting information on a channel state to the base station on the basis of a Q-CDM code by the terminal; and receiving downlink data, to which coordinated precoding is applied, from the base station by the terminal. Interference signals that have an intensity greater than a predetermined threshold from among the plurality of interference signals may be removed by using the Q-CDM code, and interference signals that have an intensity less than the predetermined threshold from among the plurality of interference signals may be removed by using null precoding.

主权项

1. A method for supporting coordinated precoding in a wireless access system, comprising:
transmitting, by a user equipment (UE), a measurement result of a plurality of interference signals transmitted from a plurality of contiguous base stations (BSs) to a base station (BS); receiving, by the user equipment (UE), quasi-orthogonal CDM (Q-CDM) code information decided by the base station (BS) and the plurality of contiguous base stations (BSs) from the base station (BS) so as to remove some of the plurality of interference signals; transmitting, by the user equipment (UE), channel state information (CSI) to the base station (BS) on the basis of the Q-CDM code; and receiving, by the user equipment (UE), downlink data to which the coordinated precoding is applied, from the base station (BS), wherein an interference signal having a higher intensity than a predetermined threshold value from among the plurality of interference signals is removed through the Q-CDM code, and an interference signal having a lower intensity than a predetermined threshold value from among the plurality of interference signals is removed through null precoding.