Patent ID: 9577812
Date: 2017-02-21
CPC Classifications: H04L,H04W

Claim:
1. A method for aggregating a plurality of cells, the method comprising: determining, by a first cell, whether or not to add one or a plurality of second cells for user equipment, wherein a maximum number of cells are determined depending on a number of cells that belong to the first cell and the one or the plurality of second cells and whose reference configuration has been set as a specific Time Division Duplex (TDD) UL-DL configuration and a number of cells that have been actually set as the specific TDD UL-DL configuration, transmitting, by the first cell, a configuration for adding one or a plurality of second cells to the user equipment based on the determined maximum number of cells; and transmitting, by the first cell, a signal for activating the one or the plurality of second cells to the user equipment, wherein both the first cell and the second cells operate in TDD or the first cell and the second cells independently operate in TDD and Frequency Division Duplex (FDD).