Abstract:
In the present invention, disclosed is a method for a terminal, which receives a downlink signal from a first base station and transmits an uplink signal to a second base station, transmitting a sounding reference signal (SRS) in a wireless communication system. More specifically, the method comprises the steps of: receiving from the first base station downlink control information including a triggering message of a first SRS; determining transmission power of the first SRS on the basis of the downlink control information; and transmitting the first SRS to the first base station with the transmission power that is determined, wherein a transmission power control command field, which is included in the downlink control information, is applied to a closed loop parameter for determining the transmission power of the first SRS.
Abstract:
The present invention relates to a wireless communication system. A method by which a user equipment reports a channel state information (CSI) in a wireless communication system, according to one embodiment of the present invention, can comprise the steps of: setting up a first CSI process in which a subframe pattern for a first subframe set, which uses an almost blank subframe (ABS), and a second subframe set, which does not use the ABS, is set; setting up a second CSI process in which the subframe pattern is not set; setting a second rank indicator (RI) of the second CSI process to be the same as a first RI corresponding to the second subframe set when the second CSI process is established so as to have the same RI as the first CSI process; and transmitting the CSI on the basis of the first CSI process and/or the second CSI process.
Abstract:
A method and apparatus for measuring a serving cell in a wireless communication system are disclosed. The method for performing measurement by a user equipment (UE) in a wireless communication system includes: receiving a list of aggressor cells and neighbor-cell reference signal (RS) information from a serving cell; and performing measurement of the serving cell, wherein information as to whether CRE (Cell Range Extension)-related capability is used during the measurement is determined according to at least one of the presence or absence of CRE-related capability of the UE and information regarding configuration or non-configuration of restricted measurement.
Abstract:
A method and apparatus for transmitting a neighbor cell measurement command in a wireless communication system are disclosed. The method for transmitting a measurement command of a neighbor cell by a serving cell in a wireless communication system includes: confirming user equipment (UE) capability information related to cell range extension (CRE); and transmitting a measurement command including a list of cells to be measured to the UE, wherein, if the UE has CRE-related capability, the measurement command includes neighbor-cell reference signal (RS) information.
Abstract:
The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for transmitting or receiving a downlink signal considering an antenna port relationship. The method for enabling a terminal to receive a physical downlink sharing channel (PDSCH) signal in the wireless communication system according to one embodiment of the present invention can determine a PDSCH start symbol index according to the predetermined priority and receive the PDSCH signal therethrough. The PDSCH start symbol index can be determined when a PDSCH start symbol value included in a PDSCH resource element mapping and Quasi co-location Indicator (PQI) parameter set is determined by an upper layer. The PDSCH start symbol index can be determined according to the PDSCH start symbol value for a cell receiving the PDSCH when the PDSCH start symbol value included in the PQI parameter set is not determined by the upper layer.
Abstract:
A method and wireless equipment for performing a hybrid automatic repeat request (HARQ) in a wireless communication system are provided. The wireless equipment receives TB from a base station, and determines whether it is possible to completely perform decoding on the TB within a timing at which HARQ ACK/NACK for the TB is transmitted. If it is determined that it is difficult to completely perform the decoding on the TB, the wireless equipment transmits a discontinuous transmission (DTX) signal indicating the decoding on the TB was skipped to the base station.
Abstract:
The present application discloses a method of performing a measurement for radio resource management (RRM) by user equipment in a wireless communication system. In particular, the method includes: receiving information on the low-power frequency band of an adjacent cell for the RRM from a serving cell; performing a measurement on the low-power frequency band for the RRM using a reference signal received at a preset period; and reporting the result of the measurement to the serving cell.
Abstract:
A method for supporting a measurement of a user equipment, according to one embodiment, comprising the steps of: a second cell deciding at least one measurement resource set with respect to the user equipment, based on subframe setting information of a first cell and/or transmission power information of the first cell; and the second cell transmitting to the user equipment information for indicating the at least one measurement resource set that is decided, wherein the subframe setting information of the first cell can include setting information with respect to a first almost blank subframe (ABS) and a second ABS.
Abstract:
A method for controlling inter-cell interference in a wireless communication system includes receiving information about an interference control period from a central controller, performing carrier sensing based activation competition in the interference control period, and scheduling user equipments served by the BS if the BS wins the carrier sensing based activation competition. The carrier sensing based activation competition may be based on a BS-specific back-off value related to a BS-specific weight. The BS-specific weight may be determined as the sum of products of an instantaneous throughput and a differential value of an average throughput based utility function, for all UEs served by the BS.
Abstract:
The present invention relates to a method for a first transmission point to transmit a downlink signal to a terminal in a wireless communication system, including a step of mapping a physical downlink shared channel (PDSCH) to resource elements (REs) in a first area, with the exception of an RE corresponding to a cell-specific reference signal (CRS) of a second transmission point from among the REs available for the PDSCH, and further including a step of, when the terminal is a second type of terminal, mapping the PDSCH to REs in a second area corresponding to the CRS of the second transmission point.