Abstract:
A method for and apparatus for performing data transmission in a wireless communication system is provided. A wireless device checks a configuration including virtual cell groups, the virtual cell group each including two more serving cells which are shared an identical virtual cell identification (ID), checks discovery signals scrambled with the identical virtual cell ID and system information including a physical random access channel (PRACH) configuration, from master cells each of the virtual cell groups. Thus, the UE performs data transmission seamlessly because serving cells are belonged to the identical virtual cell ID even if a serving cell is switched from one to another in view of a physical cell.
Abstract:
The present invention relates to a method for transmitting a signal in a wireless communication system and an apparatus for same, and comprises the steps of: receiving a plurality of data signals through a plurality of subframes; and transmitting acknowledgement (ACK)/negative ACK (NACK) signals with respect to the plurality of data signals, wherein when at least one subframe from among the plurality of subframes is a special subframe, an ACK/NACK signal with respect to a first data signal that is received through the at least one subframe is transmitted from an uplink subframe different from an uplink subframe from which an ACK/NACK signal with respect to a second data signal from among the plurality of data signals, not including the first data signal, is transmitted.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal transmitting ACK/NACK information in a carrier aggregation-based wireless communication system, comprising the steps of: receiving one or more PDCCH signals from a specific SF section in an FDD cell; receiving one or more PDSCH signals indicated by the one or more PDCCH signals; and transmitting ACK/NACK information corresponding to the one or more PDSCH signals through a physical uplink control channel (PUCCH), wherein the specific SF section includes one or more first SFs and one second SF, wherein PUCCH transmission is limited in one or more first UL SFs corresponding to the one or more first SFs, wherein PUCCH transmission is allowed from a second UL SF corresponding to the second SF, the ACK/NACK information is transmitted from the second UL SF by using a PUCCH resource allocated by an upper layer when a PDSCH signal exists in the one or more first SFs, and wherein the ACK/NACK information is transmitted from the second UL SF by using a PUCCH resource linked to an index of a resource from which a corresponding PDCCH signal is transmitted when one PDSCH signal exists only in the second SF.
Abstract:
A method for and apparatus for performing a synchronization in a wireless communication system is provided. A wireless device checks a configuration including a resource relationship about reference signals (RSs) between a first cell and a second cell; receives a first reference signal (RS) from the first cell; determines a timing reference to receive a second RS based on the resource relationship; receives the second RS from the second cell based on the timing reference; performs a frequency tracking using the second RS; and decodes data signals from the second cell.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal controlling uplink power in the wireless communication system, comprising the steps of: configuring an uplink subframe (UL SF) of a first set and a UL SF of a second set; receiving a downlink control information (DCI) format including a bitmap for indicating transmit power control (TPC) for a plurality of terminals; and controlling transmit power of an uplink channel by using TPC information on the terminals from the bitmap, wherein the TPC information is used for controlling transmit power of an uplink channel transmitted from the UL SF of the first set when the DCI format comprises a first identifier, and the TPC information is used for controlling transmit power of an uplink channel transmitted from the UL SF of the second set when the DCI format comprises a second identifier.
Abstract:
There is a method for performing measurements. The method may be performed by a user equipment (UE) and comprise: receiving a measurement subframe pattern for a neighbor cell and a measurement timing configuration for a discovery signal; selecting at least one or more subframes to perform the measurement based on both of the measurement subframe pattern and the measurement timing configuration; and performing the measurement by using the discovery signal of the neighbor cell on the selected subframes.
Abstract:
There is provided a method for performing measurements. The method may be performed by a user equipment (UE) and comprise: receiving measurement configuration information including a measurement timing configuration for a discovery signal; and performing measurements for a first cell and measurements for a second cell. The measurement timing configuration for the discovery signal may be applied to the measurements for the second cell, but not to the measurements for the first cell.
Abstract:
The present disclosure provides a method of being allocated, by a user equipment (UE), a resource via downlink control information (DCI) in a wireless communication system. Specifically, a UE receives, from a base station, a radio resource control (RRC) message including list information associated with a plurality of time-domain resource allocation (TDRA) tables, and receives, from the base station, a DCI in order to be allocated a resource on a time domain. Here, the resource on the time-domain is allocated according to one TDRA table among the plurality of TDRA tables, based on the DCI and the one TDRA table is selected among the plurality of TDRA tables, based on a configuration of the DCI and/or a specific field included in the DCI.
Abstract:
A method for monitoring scheduling information in a wireless communication system, and a device using the method are provided. The method: receives first configuration information about a search space of a first cell and second configuration information about the search space of a second cell; and monitors scheduling information for scheduling the second cell in the search space of the first cell, wherein the number of physical downlink control channel (PDCCH) candidates per aggregation level (AL) to be used in the search space of the first cell is determined on the basis of the second configuration information.
Abstract:
The present application discloses a method for transmitting a downlink signal by a child node in a next generation wireless communication system. Specifically, the method comprises the steps of: receiving information on a timing advanced value from a parent node; determining a reception timing of a first downlink signal transmitted from the parent node; calculating a transmission timing of a second downlink signal preceding the reception timing of the first downlink signal by a timing correction value based on a preconfigured offset value and the timing advanced value; and according to the transmission timing of the second downlink signal, transmitting the second downlink signal to another child node.