Transmission method and apparatus in a wireless communication system in which a cell includes a plurality of subcells

摘要

A transmission method and apparatus are provided for use in a wireless communication system in which a cell includes a plurality of sub-cells. A Transmission Point (TP) in the wireless communication system includes a transmitter configured to transmit a signal to each of the plurality of sub-cells through a plurality of antennas; a receiver configured to receive uplink control information from a User Equipment (UE) located within at least one of the plurality of sub-cells; and a controller configured to determine a virtual matrix for each of the plurality of sub-cells, to select a precoding matrix according to the virtual matrices of the plurality of sub-cells, to determine a cooperative transmission mode or a normal transmission mode, based on the received uplink control information, and to control the transmitter to perform downlink transmission on a sub-cell basis through the virtual matrices of the sub-cells according to the determined transmission mode.

主权项

1. A transmission point (TP) in a wireless communication system in which a cell includes a plurality of sub-cells, the TP comprising:
a transmitter configured to transmit a signal to each of the plurality of sub-cells through a plurality of antennas; a receiver configured to receive uplink control information from a User Equipment (UE) located within at least one of the plurality of sub-cells; and a controller configured
to determine a virtual matrix for each of the plurality of sub-cells,to select a precoding matrix according to the virtual matrices of the plurality of sub-cells,to determine a transmission mode from among a plurality of available transmission modes, based on the received uplink control information, andto control the transmitter to perform downlink transmission on a sub-cell basis through the virtual matrices of the sub-cells according to the determined transmission mode, wherein the plurality of available transmission modes includes:
(1) a cooperative transmission mode in which at least one neighbor sub-cell transmits a downlink signal in same frequency resources to the UE, wherein the cooperative transmission mode is determined as the transmission mode if a difference between strengths of a signal received from a serving sub-cell and a signal received from the at least one sub-cell at the UE is less than or equal to a threshold, and(2) a normal transmission mode in which only the serving sub-cell transmits a signal to the UE, wherein the virtual matrix of each of the plurality of sub-cells is determined according to a number of antennas connected to the sub-cell and a number of paths in which a signal of the sub-cell is input.