Abstract:
Disclosed are a method and an apparatus for setting a reference signal. A wireless apparatus receives a primary synchronization signal (PSS) transmitted by a first orthogonal frequency division multiplexing (OFDM) symbol and a secondary synchronization signal (SSS) from a second OFDM symbol, and can search information for setting a reference signal on the basis of symbol numbers of the first OFDM symbol and the second OFDM symbol. Inter-cell interference can be reduced by means of a variety of methods for setting a reference signal.
Abstract:
The present invention relates to a method of transmitting an acknowledgement/not-acknowledgement (ACK/NACK) and a device for using such a method. According to the present invention, a cell-specific downlink-uplink setting for one of a plurality of serving cells and a reference UL-DL setting is received, an effective downlink sub-frame capable of actually receiving a data unit from one serving cell is determined based on the settings, and only an ACK/NACK for the effective downlink sub-frame is configured as a bit string and fed back.
Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for receiving data on user equipment supporting a plurality of types of carriers in the wireless communication system, and to the apparatus for same, the method comprising the steps of: receiving a transmission mode-common (TM-common) downlink control information (DCI) format including downlink scheduling information; and receiving the data through a resource indicated by the downlink scheduling information, wherein the data is modulated by using a user equipment-specific (UE-specific) reference signal when the data is received through a first type of carrier, and the data is modulated through a first cell-common reference signal when the data is received through second type of carrier.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in a terminal for which a coordinated multi-point (CoMP) set including a plurality of cells is constructed in a carrier aggregation-based wireless communication system. The method comprises: a step of receiving a physical downlink control channel signal (PDCCH) for uplink scheduling; step of receiving a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal on a secondary cell (SCell); and a step of transmitting PDSCH signal acknowledgement information via a physical uplink control channel (PUCCH). In cases where the SCell belongs to the CoMP set having a primary cell (PCell), a resource for the PUCCH is provided using an index for a specific resource unit from among one or more resource units used in transmitting the PDCCH signal. In cases where the SCell does not belong to the CoMP set having a PCell, a resource for the PUCCH is provided using a value of a specific field within the PDCCH signal.
Abstract:
A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD includes: generating a first HARQ-ACK (hybrid automatic repeat request-acknowledgement) set for a first cell using a value M; generating a second HARQ-ACK set for a second cell using the value M; and transmitting a bit value corresponding to a third HARQ-ACK set including the first HARQ-ACK set and the second HARQ-ACK set in an uplink subframe n, wherein M=max(M1, M2), max(M1, M2) representing a value being equal to or larger than not smaller between M1 and M2, wherein M1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and M2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different UL-DL configurations.
Abstract:
The present invention provides a method and user equipment for performing radio resource management. The user equipment receives a request for radio resource management for a cell, and performs radio resource management for the cell based on said request for radio resource management. The request for radio resource management includes information indicating the type of reference signal to be used in the radio resource management.
Abstract:
The present invention relates to a wireless communication system, and more particularly, to a method for a terminal to transmit and receive control information and/or a response signal in a carrier aggregation-based wireless communication system, and to an apparatus therefor, wherein the method includes the steps of: constituting a first cell group having a PCell; constituting a second cell group having at least one SCell; and carrying out a process for transmitting and receiving specific cell-related control information and/or a response signal. The control information and/or the response signal are transmitted and received on the first cell group or the second cell group in the event the first cell group and the second cell group are managed by the same base station. The control information and/or the response signal are transmitted and received on only the first cell group or the second cell group depending on the type of the control information in the event the first cell group and the second cell group are managed by different base stations.
Abstract:
A method for receiving ACK/NACK information transmitted in response to a downlink transmission. The method according to one embodiment includes transmitting one or more relay physical downlink control channels (R-PDCCHs); transmitting the downlink transmission according to the one or more R-PDCCHs in a downlink subframe set including M downlink subframes, where M is a positive integer; and receiving ACK/NACK information for the downlink transmission in the downlink subframe set. The downlink subframe set and the uplink subframe are configured for a time division duplex (TDD). The one or more R-PDCCHs are control channels different from a physical downlink control channel (PDCCH). N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 are configured by a higher layer, where N is a positive integer and M≦N. Each of M PUCCH resources corresponds to each of the M downlink subframes.
Abstract:
The present invention relates to a wireless communication and, more specifically, to a method for transmitting an HARQ) response by a UE in a wireless communication system, and an apparatus for the same. The method includes receiving an E-PDCCH signal on at least one of a plurality of enhanced physical downlink control channel (E-PDCCH) sets, each E-PDCCH set including a plurality of resources units indexed per E-PDCCH set; and transmitting the HARQ response using a physical uplink control channel (PUCCH) resource determined using the index of the first resource unit among one or more resource units carrying the E-PDCCH signal, wherein the index of the first resource unit is determined on the basis of the E-PDCCH set having the lowest index among the plurality of E-PDCCH sets when specific conditions are satisfied.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation and operates in a time division duplex (TDD) scheme, the method comprising a step of transmitting a hybrid automatic repeat request-acknowledgement (HARQ-ACK) for each component carrier (CC) according to a specific parameter; wherein if the specific parameter is smaller than a specific value, the HARQ-ACK for each CC is individually transmitted, and if the specific parameter is equal to or larger than the specific value, the HARQ-ACK for each CC is transmitted using the specific number of bit values corresponding to said HARQ-ACK. The present invention also relates to an apparatus for the method.