摘要:
The present invention relates to a wireless communication system. In more detail, a method for performing HARQ (hybrid automatic repeat request) retransmission by a communication device in a wireless communication system, the method comprising: initially transmitting a data block to a Base Station (BS); attempting PDCCH (physical downlink control channel detection) in a predetermined time interval including a plurality of subframes after transmission of an uplink channel signal; and retransmitting the data block when a PDCCH signal indicating retransmission of the data block is detected in the predetermined time interval, wherein reception of a PHICH (physical hybrid ARQ indicator channel) corresponding to initial transmission of the data block is skipped.
摘要:
According to the present invention, one or more PDCCH-SFs are set from among subframes in a predetermined duration so as to force user equipment (UE) to perform a PDCCH blind decoding (BD). Information indicating said set PDCCH-SF is provided to the UE from a base station (BS). The UE performs the PDCCH BD only in the PDCCH-SF which is set to the UE itself, and not to all subframes, and performs HARQ process(es) according to the PDCCH BD. The present invention exhibits the advantages of reducing the number of BDs which the UE has to perform and of reducing the implementation complexity of the UE.
摘要:
According to the present invention, one or more PDCCH-SFs are set from among subframes in a predetermined duration so as to force user equipment (UE) to perform a PDCCH blind decoding (BD). Information indicating said set PDCCH-SF is provided to the UE from a base station (BS). The UE performs the PDCCH BD only in the PDCCH-SF which is set to the UE itself, and not to all subframes, and performs HARQ process(es) according to the PDCCH BD. The present invention exhibits the advantages of reducing the number of BDs which the UE has to perform and of reducing the implementation complexity of the UE.
摘要:
A wireless communication system and a method and apparatus for transmitting ACK/NACK for downlink transmission in a wireless communication system are disclosed. The method for transmitting ACK/NACK information for a downlink transmission in a receiver of a wireless communication system includes being configured with N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 by a higher layer, receiving the downlink transmission from a transmitter in a downlink subframe set including M (1
摘要:
The present invention relates to a wireless communication system. More particularly, the present invention, when cells each operating in different TDD DL-UL configurations are merged, provides a plan for setting a downlink ACK/NACK transmission/reception timing for a cross-CC scheduling. In addition, the present invention, according to the downlink ACK/NACK transmission/reception timing, provides a base station for transmitting a ACK/NACK channel to a user equipment, and a user equipment for receiving the ACK/NACK channel from the base station.
摘要:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink channel state information (CSI) in a wireless communication system that supports carrier aggregation, and to an apparatus for the method. The method for reporting CSI in a wireless communication system that supports carrier aggregation comprises the steps of: configuring a plurality of downlink component carriers (DL CCs); setting a CSI report mode on the plurality of DL CCs for each DL CC; and performing an operation for transmitting CSI according to the CSI report mode set on each DL CC. If a P-number of CSI overlap in the same subframe and a first condition is satisfied, a Q-number of CSI among the P-number of CSI are transmitted through a first physical channel, and if the P-number of SCI overlap in the same subframe and a second condition is satisfied, only an R-number of CSI among the P-number of CSI are transmitted through a second physical channel which is different from the first physical channel, wherein R is smaller than Q.
摘要:
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 TDD system, and to an apparatus therefor. The system comprises the steps of: generating a first set of hybrid automatic repeat request acknowledgement (HARQ-ACK) associated with a first component carrier (CC); generating a second set of HARQ-ACK associated with a second CC; and transmitting 4-bit information corresponding to the first set of HARQ-ACK and the second set of HARQ-ACK on a physical uplink shared channel (PUSCH).
摘要:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting a carrier merge, and a device therefor, the method comprising the steps of: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception response information on the data through a UL subframe of the second cell, wherein the relationship between the DL subframe and the UL subframe is determined by a parameter value set in a specific TDD UL-DL configuration inside a TDD UL-DL configuration set, and the specific TDD UL-DL configuration is the TDD UL-DL configuration having the least number of DL subframes from one or more TDD UL-DL configurations, in which subframes set as a DL in the first cell or the second cell are all set as DLs.
摘要:
The method and device proposed by the present invention, in a carrier situation having a UE consisting of a plurality serving cells, change a serving cell used in transmitting uplink control information from a specific serving cell to a different serving cell under the control of a BS or the control of a UE. The present invention enables a faster and more flexible transmission/reception of the UL control information.
摘要:
Abstract: The present invention relates to a wireless communication system. More particularly, the present invention, when cells each operating in different TDD DL-UL configurations are merged, provides a plan for setting a UL grant transmission/reception timing for a cross-CC scheduling. In addition, the present invention, according to the UL grant timing, provides a base station for transmitting UL grant to a user equipment, and a user equipment for receiving the UL grant from the base station.