Abstract:
Provided are a communication method and an apparatus utilizing the same in a wireless communication system. The apparatus configures a resource reservation period (RRP), the period during which channel access by the apparatus permitted in an unlicensed band is not permitted. When the permission conditions are met, the apparatus accesses the channel during the RRP.
Abstract:
The resent invention relates to a wireless communication system, and particularly to a method and device for same, the method including the steps of: receiving, from a base station, L1 information about M number of UCells (M≦N) on which downlink resources are temporarily configured, wherein M number of UCells (M≦N) are a subset of N number of UCells; selectively aggregating K number of UCells (K
Abstract:
Provided are a method and a device whereby a synchronization signal is transmitted and received. One embodiment of the present invention involves using one of a plurality of cells (first cell hereinbelow) in order to transmit synchronization signal setting information of a cell (second cell hereinbelow) set in an unlicensed band of the plurality of cells. The synchronization signal is transmitted on the second cell, based on the synchronization signal setting information. The synchronization signal is used in order to acquire time and frequency synchronization with the second cell.
Abstract:
Provided are a method and an apparatus for controlling transmission power in a wireless communication system. A wireless device is connected to a first serving cell utilizing a licensed band and a second serving cell utilizing a non-licensed band. The transmission power from the second serving cell is determined by considering the clear channel assessment (CCA) coverage of the wireless device or the second serving cell.
Abstract:
A method for managing a soft buffer by a terminal in which a plurality of cells are set, in accordance with one embodiment of the present invention, comprises the steps of: receiving, from a base station, at least one parameter for allocation of the soft buffer; and allocating the soft buffer to the plurality of cells on the basis of the at least one parameter, wherein the soft buffer is divided unequally on the basis of the received at least one parameter, and at least one of the divided areas of the unequally divided soft buffer is shared by at least two cells among the plurality of cells.
Abstract:
Provided are a method and an apparatus for transmitting/receiving scheduling information for one cell (a particular cell) from among a plurality of cells under a carrier aggregation condition in which a plurality of cells are aggregated. One embodiment according to the present invention transmits/receives a downlink grant for the particular cell from a first cell from among the plurality of cells, and transmits/receives an uplink grant for the particular cell from a second cell, from among the plurality of cells, which is different from the first cell. The particular cell may be a different cell from the first and second cells, or may be the same cell as the first cell or the second cell.
Abstract:
The present invention relates to a method and a device for transmitting uplink control information in a wireless communication system supporting carrier merging of a plurality of cells comprising a first cell and a second cell, the method comprising the steps of: receiving a first uplink grant from a base station by means of a random access response; the first uplink grant scheduling first physical uplink shared channel (PUSCH) transmission on a first cell and receiving a second uplink grant from the base station by means of a physical downlink control channel (PDCCH); and the second uplink grant scheduling a second PUSCH transmission on a second cell and, if the first PUSCH transmission and the second PUSCH transmission are configured in the same subframe, transmitting uplink control information to the base station on the second cell by means of a second PUSCH, wherein the first PUSCH transmission scheduled on the first cell is dropped.
Abstract:
The present invention relates to a wireless communication system and, more particularly, to a method and a device for receiving a DL signal, by a terminal, in an FDD cell comprising a DL CC and a UL CC, the method comprising the steps of: receiving SF reconfiguration information about a UL CC; and receiving DL data on an FDD cell, wherein, if the DL data is received in a DL SF on the DL CC, the DL data is processed by means of an OFDM mode and, if the DL data is received in a DL SF reconfigured from a UL SF on the basis of the SF reconfiguration information on the UL CC, the DL data is processed by means of an SC-FDM mode.
Abstract:
A method for receiving, by a user equipment, a downlink signal, the method includes receiving, by the user equipment from a serving cell, discovery signal based radio resource measurement information for a cell different from the serving cell; receiving, by the user equipment from the cell, a discovery signal of the cell at discovery signal transmission periodicity based on the discovery signal based radio resource measurement information; and performing, by the user equipment, reference signal received power, RSRP, measurement for the cell based on the discovery signal.
Abstract:
A method is presented for transmitting an acknowledgement/negative acknowledgement (ACK/NACK) signal by a user equipment (UE) in a wireless communication system. The UE is configured with a primary cell (PCell) and a secondary cell (SCell). The UE receives downlink control information (DCI) via a physical downlink control channel (PDCCH). The DCI including a first field for transmit power control information and a second field for ACK/NACK resource offset information. The UE receives downlink data via a physical downlink shared channel (PDSCH) based on the DCI. The UE transmits an ACK/NACK signal for the downlink data using an ACK/NACK resource. When the downlink data is received on the PCell, the ACK/NACK resource is determined by adding a lowest resource index of the PDCCH and a value of the ACK/NACK resource offset information. When the downlink data is received on the SCell, the first field includes ACK/NACK resource indication information.