US 9,572,138 B2 · Method of transmitting control information in a wireless communication system and apparatus thereof

Abstract

A method and apparatus for transmitting control information in a wireless communication system supporting carrier aggregation (CA) is disclosed. A method for transmitting control information to a base station (BS) by a user equipment (UE) in a wireless communication system includes receiving at least one of a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) from the base station through at least one serving cell configured in the user equipment, and transmitting control information regarding PDCCH reception or PDSCH reception indicated by the PDCCH to the base station. The control information is transmitted through a physical uplink control channel (PUCCH) of a primary cell, using control information feedback timing of at least one of the primary cell and a first cell of the at least one serving cell, and the at least one serving cell uses different uplink and downlink (UL-DL) configurations.

Claims18

Dependent claims

A method for transmitting control information to a base station by a user equipment in a wireless communication system supporting aggregation of a plurality of serving cells, the user equipment being configured with the plurality of serving cells including a primary cell and a secondary cell operating in time division duplex (TDD), the method comprising:

receiving each of a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) from the base station in a downlink subframe through a respective one of the primary cell and secondary cell;
and
transmitting control information regarding the received PDSCH to the base station in an uplink subframe of the primary cell or the secondary cell,
wherein, when the primary cell has a first uplink-downlink (UL-DL) configuration and the secondary cell has a second UL-DL configuration different from the first UL-DL configuration, an UL-DL timing relation of each of the primary cell and secondary cell is selected to be equal to a timing relation of the one of the first UL-DL configuration or the second UL-DL configuration having a smallest number of uplink subframes, and
wherein each of the first UL-DL configuration and the second UL-DL configuration includes at least one uplink subframe.

2 more elements

A user equipment configured to transmit control information to a base station in a wireless communication system supporting aggregation of a plurality of serving cells, the user equipment being configured with the plurality of serving cells including a primary cell and a secondary cell operating in time division duplex (TDD), the user equipment comprising:

a receiver configured to receive each of a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) from the base station in a downlink subframe through a respective one of the primary cell and secondary cell;
a transmitter configured to transmit control information regarding the received PDSCH to the base station in an uplink subframe of the primary cell or the secondary cell;
and
a processor,
wherein, when the primary cell has a first uplink-downlink (UL-DL) configuration and the secondary cell has a second UL-DL configuration different from the first UL-DL configuration, the processor is configured to assign an UL-DL timing relation of each of the primary cell and secondary cell to be equal to a timing relation of the one of the first UL-DL configuration or the second UL-DL configuration having a smallest number of uplink subframes, and
wherein each of the first UL-DL configuration and the second UL-DL configuration includes at least one uplink subframe.

3 more elements

Dependencies are inferred from the claim text.

Method of transmitting control information in a wireless communication system and apparatus thereof

Life of this patent

Method of transmitting control information in a wireless communication system and apparatus thereof

Life of this patent

Abstract

Claims18