Abstract:
A method is presented of reporting control information in a wireless communication system in which M downlink time divisional duplex (TDD) subframes are associated with an uplink TDD subframe. A user equipment (UE), supporting at least one cell including a primary cell, receives a radio resource control (RRC) message indicating resource allocation information used for a first PUCCH format. The UE receives a first physical downlink shared channel (PDSCH) and a second PDSCH in one of the M downlink TDD subframes, wherein the second PDSCH is received with a downlink assignment index (DAI). The UE selects a physical uplink control channel (PUCCH) format among a plurality of PUCCH formats including the first PUCCH format and a second PUCCH format, and transmits a positive-acknowledgement (ACK)/negative-acknowledgement (NACK) signal for the first and second PDSCHs by using the selected PUCCH format.
Abstract:
A method for controlling transmission powers by a communication apparatus in a wireless communication system supporting a plurality of component carriers. When a sounding reference symbol (SRS) transmission overlaps with a physical uplink shared channel (PUSCH) transmission in a time domain, the communication apparatus checks whether a total of a PUSCH transmission power for the PUSCH transmission on a first component carrier and a SRS transmission power for the SRS transmission on a second component carrier exceeds a maximum transmission power configured for the communication apparatus, and drops the SRS transmission if the total of the PUSCH transmission power and the SRS transmission power exceeds the maximum transmission power configured for the communication apparatus.
Abstract:
A method and a user equipment (UE) for receiving a power headroom report in a wireless access system that supports a carrier aggregation are discussed. The method according to an embodiment includes transmitting by an eNB to a UE an uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC); and receiving the power headroom report by the eNB from the UE. The power headroom report includes a power headroom value for the anchor UL CC, when the eNB has configured the UE for a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission. The method further includes reporting the power headroom value to a base station. The power headroom value is calculated.
Abstract:
A method is provided for controlling transmission powers by a communication apparatus in a wireless communication system supporting a plurality of component carriers. When a sounding reference symbol (SRS) transmission overlaps with a physical uplink control channel (PUCCH) transmission in a time domain, the communication apparatus checks as to whether a total of a PUCCH transmission power for the PUCCH transmission on a first component carrier and a SRS transmission power for the SRS transmission on a second component carrier exceeds a maximum transmission power configured for the communication apparatus. The SRS transmission is dropped by the communication apparatus if the total of the PUCCH transmission power and the SRS transmission power exceeds the maximum transmission power configured for the communication apparatus.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for performing processes in which a terminal determines control channel allocation, as well as to an apparatus for the method. The method comprises the following steps: monitoring, on a first carrier, a first search space, containing a control channel candidate set, for control channels having no carrier indication information; and monitoring, on a second carrier, a second search space, containing a control channel candidate set, for control channels having carrier indication information. If the terminal is set to monitor a plurality of control channel candidates which have the same radio network temporary identifier (RNTI), the same information size, and the same first control channel element (CCE) in the first search space and in the second search space, the control channels are received only in the first search space on the first carrier.
Abstract:
A method and apparatus for transmitting control information are discussed. The method can include generating uplink control information (UCI) and transmitting the UCI through an physical uplink control channel (PUCCH) in a subframe, wherein when the subframe is configured for transmission of a scheduling request (SR) and when transmission of a hybrid automatic repeat request (HARQ)-acknowledgement (ACK) coincides with the subframe, transmission power of the PUCCH is determined based on a number of HARQ-ACK information bits and a SR bit. A value of the SR bit can be determined by whether or not the subframe is configured for a scheduling request.
Abstract:
A method of reporting control information in a wireless communication system in which M downlink time divisional duplex (TDD) subframes are associated with an uplink TDD subframe. A user equipment (UE) receives resource allocation information used for a first physical uplink control channel (PUCCH) format. The UE selects a PUCCH format among a plurality of PUCCH formats including the first PUCCH format and a second PUCCH format. The second PUCCH format is selected if the UE receives a first physical downlink shared channel (PDSCH) in one of the M downlink TDD subframes on the primary cell. The UE receives a second PDSCH with a downlink assignment index (DAI) in one of the M downlink TDD subframes on the primary cell. The UE does not receive a first physical downlink control channel (PDCCH) corresponding to the first PDSCH on the primary cell.
Abstract:
Disclosed are a method and an apparatus for transmitting channel state information (CSI) of a user equipment, which is allocated a plurality of serving cells, in a wireless communication system. The method comprises: receiving setting information for setting groups comprising at least one serving cell from the plurality of serving cells, and transmitting periodic CSI with respect to a group that is selected according to priority between the groups, when the periodic CSI with respect to each of the groups is set to be transmitted from the same subframe, wherein the periodic CSI with respect to each of at least two serving cells are transmitted together when the at least two serving cells are included in the group that is selected.
Abstract:
Provided are a method for a terminal transmitting uplink control information (UCI) through a physical uplink control channel (PUCCH) in a wireless communication system, and a terminal using the method. A transmission power to be applied to the uplink control channel is determined on the basis of a value subordinate to a PUCCH format, and at least one type of UCI is transmitted from the physical uplink control channel by using the transmission power that is determined, wherein when the PUCCH format is PUCCH format 3, and the at least one type of UCI includes acknowledgement/negative-acknowledgement (ACK/NACK) and periodic channel state information (CSI), the value subordinate to the PUCCH format is determined on the basis of the number of bits of the ACK/NACK and the number of bits of the periodic CSI.
Abstract:
A method is described for transmitting a control signal in a wireless communication system. A wireless communication system supporting multiple antennas, transmits, by a user equipment (UE), a control signal on an uplink control channel at a subframe i. Furthermore, an uplink transmit power PPUCCH(i) for the uplink control channel at the subframe i is determined based on a mathematical equation. Additionally, the mathematical equation includes a min function and uses parameters including PCMAX(i), P0_PUCCH, ΔF_PUCCH(F), g(i), PL, Δ(M) and PL where PCMAX(i) is a configured UE transmit power in subframe i, P0_PUCCH is a parameter composed based on provisions by a higher layer, ΔF_PUCCH(F) is a parameter provided by the higher layer, PL is a downlink pathloss estimate calculated in the UE, and g(i) is a value relating to a UE specific value.