Patent ID: 9398539
Filing Date: 2016-07-19
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method of transmitting a signal of a multi-node system employing a plurality of nodes and a base station for connecting with each of the plurality of nodes, the method comprising: transmitting a first signal to a user equipment via the plurality nodes by applying a first power factor; receiving power factor information as a feedback from the user equipment; and transmitting a second signal to the user equipment via at least one node among the plurality of nodes by applying a second power factor, wherein the first power factor and the second power factor are elements for determining transmit power to be applied to the plurality of nodes, wherein the power factor information includes information for transmit power applicable to each of the plurality of nodes by measuring the first signal, wherein the second power factor is determined based on the power factor information, wherein the power factor information includes a node index for indicating a specific node among the plurality of nodes and a power control field for requesting an increase or decrease of transmit power of the specific node, wherein the second signal includes codewords, and a same modulation and coding scheme (MCS) is applied to the codewords, wherein the plurality of nodes represent a plurality of antennas or antenna groups which is separated from a distributed antenna system (DAS), wherein the power factor information includes information on one MCS commonly applied to all nodes which transmit the second signal, and wherein a matrix index is used to indicate a matrix selected in a codebook, which is a set of matrices for specifying a predetermined power factor of each node of the plurality of nodes.