Abstract:
The present invention relates to a method of transmitting and receiving a signal in a wireless communication system. In particular, in a time division multi-cell cooperative communication system, a base station may receive a reference signal, estimate a channel of each user terminal based on the reference signal, and determine a transmission and reception filter based on estimated channel information. The base station and a cooperative base station that cooperates with the base station may mutually exchange the reference signal and average signal power information on a terminal and determine the transmission and reception filter based on exchanged information.
Abstract:
A method for transmitting channel status information (CSI) via uplink in a wireless communication system includes transmitting a first precoding matrix indicator (PMI) and a second PMI at a subframe. A subsampled codebook for each of a precoding codebook for Rank-1 and a precoding codebook for Rank-2 is determined based on at least the first PMI or the second PMI. In case of the Rank-1 or the Rank-2, a number of elements for the first PMI is 8.
Abstract:
The present invention relates to a wireless communication system. The present invention relates to a method for transmitting ACK/NACK in a wireless communication system in which carrier aggregation is set, and an apparatus therefor. Specifically, the present invention relates to an ACK/NACK transmission method and an apparatus therefor, the method comprising the steps of: receiving information on a plurality of physical uplink control channel (PUCCH) resources via upper layer signaling; receiving a transmit power control (TPC) field on a secondary carrier through a physical downlink control channel (PDCCH); receiving data indicated by the PDCCH; and transmitting ACK/NACK for the data, wherein the ACK/NACK is transmitted using a PUCCH resource which is indicated by the value of the TPC field among the plurality of PUCCH resources.
Abstract:
A method and apparatus for transmitting a paging message in a cloud radio access network (RAN) system is provided. A baseband unit (BBU) or a mobility management entity (MME) determines a location update range of a user equipment (UE) based on moving speed and a moving direction of the UE, and transmits information this to the UE. The UE transmits information on moving information of the UE, which is determined based on the received information and a measurement result with respect to at least one accessible remote radio frequency (RF) unit (RRU) of the UE, and the measurement result to the BBU or the MME; and The BBU or MME updates the location update range of the UE based on the received measurement result and the moving information of the UE, and transmits a paging message to the UE through at least one RRU included in the updated location update range of the UE.
Abstract:
A method for transmitting channel status information (CSI) of downlink transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) and a precoder type indicator (PTI) at a first subframe, transmitting at a second subframe a first precoding matrix indicator (PMI) when the PTI has a first value and transmitting a second PMI and a wideband channel quality indicator (WB CQI) when the PTI has a second value, and transmitting at a third subframe a second PMI and a WB CQI when the PTI has a first value and transmitting a subband (SB) CQI and a second PMI when the PTI has a second value. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. Subsampled codebooks of precoding codebooks of individual Rank-2, Rank-3 and Rank-4 are applied to the second PMI.
Abstract:
A method for transmitting information data by using a Reed-Muller coding scheme in a wireless communication system is disclosed. The method includes the steps of dividing the information data to first information data and second information data if a bit size O of the information data is equal to or larger than a predetermined number; applying RM coding on each of the first information data and the second information data; concatenating the coded first information data and the coded second information data, and transmitting the concatenated data.
Abstract:
A method of transmitting and receiving a PUCCH in a wireless communication system and a device therefor are disclosed. The method performed by a UE may comprise receiving DCI, the DCI including at least one SRI information or TCI state information, updating at least one spatial relation information of a PUCCH resource based on the at least one SRI information or the TCI state information, and transmitting the PUCCH based on the at least one spatial relation information in the PUCCH resource.
Abstract:
A method and an apparatus for downlink transmission and reception based on a reference signal linkage in a wireless communication system are disclosed. A method for performing downlink reception by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure may comprise: receiving, from a base station (BS), information on a reference signal (RS) linkage, wherein the RS linkage includes information on a mapping relation between a reference RS resource and at least one target RS resource; receiving, from the BS, information on a first spatial parameter for the reference RS resource associated with a specific RS linkage; and performing the downlink reception based on a second spatial parameter corresponding to the first spatial parameter, for a specific target transmission and reception among the at least one target transmission and reception mapped to the reference transmission and reception associated with the specific RS linkage.
Abstract:
Disclosed are a method and a device for dynamically indicating and applying spatial parameters in a wireless communication system. A method for applying spatial parameters by means of a terminal in a wireless communication system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a base station, downlink control information (DCI) including first information on one or more spatial parameters, second information on time domain resource allocation, and third information on whether to schedule a data channel; transmitting, on the basis of the second information, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information to the base station on the basis of the third information indicating that the data channel is not scheduled; and after transmitting the HARQ-ACK information, performing uplink transmission to the base station or downlink reception from the base station on the basis of the one or more spatial parameters based on the first information.
Abstract:
A method and an apparatus for uplink transmission and reception based on a spatial parameter in a wireless communication system are disclosed. A method for performing uplink transmission by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure may comprise: receiving, from a base station (BS), information on a specific spatial parameter among spatial parameter candidates including at least one of a first set of spatial parameters or a second set of spatial parameters; and performing the uplink transmission, to the BS, based on the specific spatial parameter, and the first set of spatial parameter may include at least one spatial parameter candidate related to a first cell and a first type of a reference signal (RS).