摘要:
Provided is a method for transmitting a sounding reference signal by a terminal, and a terminal using the method. The method comprises the following steps: receiving carrier information indicating the carrier via which a sounding reference signal is to be transmitted; receiving a physical downlink shared channel (PDSCH) through a first downlink component carrier; and transmitting a sounding reference signal through a second downlink component carrier, wherein the second downlink component carrier is determined based on the carrier information.
摘要:
Provided is a method and an apparatus for performing a random access process in a wireless communication system. A wireless device transmits a random access preamble, based on a random access resource, to a base station, then receives a random access response to the random access preamble. The random-access resource can be set to the wireless device or to the group to which the wireless device belongs.
摘要:
The present invention relates to a method and device for monitoring a control channel in a wireless communication system. A terminal receives a UE-specific reference signal (URS) from at least one extended subframe, and monitors a control channel in an extended control channel region of the at least one extended subframe. The control channel is demodulated using the URS.
摘要:
A method and apparatus for transmitting ACK/NACK of a user equipment are provided. The method includes: receiving a first PDCCH and a second PDCCH through at least one serving cell; receiving a first PDSCH scheduled by the first PDCCH; receiving a second PDSCH scheduled by the second PDCCH; allocating a first PUCCH resource on the basis of a lowest index of a CCE on which the first PDCCH is transmitted; allocating a second PUCCH resource on the basis of a lowest index of a CCE on which the second PDCCH is transmitted; and transmitting ACK/NACK for the first PDSCH and the second PDSCH through a serving cell linked to a serving cell receiving the first PDCCH and the second PDCCH, wherein a transmission resource for transmitting the ACK/NACK is selected from the first PUCCH resource and the second PUCCH resource.
摘要:
Provided are a method and apparatus for scheduling in a carrier aggregation system. The method includes: transmitting information for indicating a plurality of secondary cells to be scheduled through a joint coded control channel by using a higher layer signal; transmitting a separate coded control channel for scheduling a primary cell; and transmitting one joint coded control channel for scheduling the plurality of secondary cells, wherein the separate coded control channel is a control channel for scheduling one data channel transmitted through the primary cell, and the joint coded control channel is a control channel for scheduling the plurality of data channels transmitted through the plurality of secondary cells.
摘要:
A method for transmitting uplink control information of a user equipment in a multi-carrier system is provided. The method includes: transmitting each of acknowledgement/not-acknowledgement (ACK/NACK) for downlink data transmitted by a base station through multiple downlink component carriers; and transmitting channel state information indicating a state of a downlink channel to the base station, wherein each of the ACK/NACK and the channel state information are allocated to the same uplink control channel resource in a subframe, and if each of the ACK/NACK and the channel state information are reserved to be transmitted on the same subframe, each of the ACK/NACK only is transmitted. Accordingly, a user equipment can transmit uplink control information while preserving a single-carrier property of an uplink signal in a multi-carrier system using carrier aggregation.
摘要:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting uplink control information where a plurality of cells are configured, and comprises: a step for receiving one or more PDCCH; a step for generating reception response information corresponding to the one or more PDCCH; and a step for transmitting through PUCCH the reception response information in a subframe, wherein the reception response information is transmitted using a PUCCH resource provided in advance by an upper layer signaling when only one PCell PDCCH is detected and the predetermined conditions are met, and is transmitted using a PUCCH resource linked to an index of a resource that makes up the PCell PDCCH when only one PCell PDCCH is detected and the predetermined conditions are not met.
摘要:
The present invention relates to a method and apparatus for transmitting a reference signal in a wireless communication system. A terminal generates a base sequence having a length of 12, for a reference signal, and determines a cyclic shift index from among a set of a cyclic shift indices {0, 3, 6, 8, 10}. The terminal cyclically shifts the base sequence on the basis of the determined cyclic shift index to generate a cyclically shifted sequence, and transmits the cyclically shifted sequence to a base station.
摘要:
A method and apparatus of transmitting an ACK/NACK signal for a hybrid automatic repeat request (HARQ) in a wireless communication system is provided. A first ACK/NACK resource index and a second ACK/NACK resource index based on resources used to transmit a downlink control channel is determined. An ACK/NACK signal for a downlink transport block is transmitted through a plurality of antennas using first ACK/NACK resources obtained from the first ACK/NACK resource index and second ACK/NACK resources obtained from the second ACK/NACK resource index. An HARQ ACK/NACK signal can be reliably transmitted through a plurality of antennas.
摘要:
A method and an apparatus for receiving downlink data in a multi-carrier system are provided. A terminal receives a downlink grant on a physical downlink control channel (PDCCH) via a first component carrier, and determines a transmission power of a physical downlink shared channel (PDSCH) depending on whether a control channel exists in each orthogonal frequency division multiplexing (OFDM) symbol of a subframe of a second component carrier that is indicated by the downlink grant. Based on the transmission power of the PDSCH, the terminal receives downlink data on the PDSCH indicated by the downlink grant via the second component carrier. When a control channel and a data channel coexist in the same OFDM symbol, the reliability of receiving the control channel can be increased.