Method for transmitting control information and apparatus for same
AssigneeLG Electronics Inc.
InventorsSuckchel Yang, Joonkui Ahn, Dongyoun Seo
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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 the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: deciding HARQ-ACK bit numbers for each cell from a plurality of cells; composing a HARQ-ACK payload comprising HARQ-ACK bit(s) for each of the plurality of cells; and transmitting the HARQ-ACK payload from a subframe n through a PUSCH.
Claims10
A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in a time division duplex (TDD), the method comprising:
- determining the number of per-cell hybrid automatic repeat request-acknowledgement (HARQ-ACK) bits for each cell included in a plurality of cells;
- configuring a HARQ-ACK payload including a plurality of per-cell HARQ-ACK bit(s);
- and
- transmitting the HARQ-ACK payload in a subframe n through a physical uplink shared channel (PUSCH),
- wherein, when the plurality of cells do not include a cell to which transmission timing according to a specific uplink-downlink (UL-DL) configuration is applied, the number of per-cell HARQ-ACK bits for each cell is determined using a value of min(W, Mc),
- wherein, when the plurality of cells include one or more cells to which transmission timing according to the specific UL-DL configuration is applied, the number of per-cell HARQ-ACK bits for each cell is determined using a value of min(W+4┌(Umax−W)/4┐, Mc), and
- wherein W denotes a value indicated by a 2-bit uplink downlink assignment index (UL DAI) field corresponding to the PUSCH, Mc denotes the number of downlink subframes corresponding to the uplink subframe n for each cell, Umax denotes a maximum value from among the numbers of downlink signals requiring HARQ-ACK responses per cell, and ┌ ┐ denotes a ceiling function.
A communication device configured to transmit uplink control information in a wireless communication system supporting carrier aggregation and operating in a time division duplex (TDD), the communication device comprising:
- a radio frequency (RF) unit;
- and
- a processor,
- wherein the processor is configured to determine the number of per-cell hybrid automatic repeat request acknowledgement (HARQ-ACK) bits for each cell included in a plurality of cells, to configure a HARQ-ACK payload including a plurality of per-cell HARQ-ACK bit(s), and to transmit the HARQ-ACK payload in a subframe n through a physical uplink shared channel (PUSCH),
- wherein, when the plurality of cells do not include a cell to which transmission timing according to a specific uplink-downlink (UL-DL) configuration is applied, the number of HARQ-ACK bits for each cell is determined using a value of min(W, Mc),
- wherein, when the plurality of cells include one or more cells to which transmission timing according to the specific UL-DL configuration is applied, the number of per-cell HARQ-ACK bits for each cell is determined using a value of min(W+4┌(Umax−W)/4┐, Mc), and
- wherein W denotes a value indicated by a 2-bit uplink downlink assignment index (UL DAI) field corresponding to the PUSCH, Mc denotes the number of downlink subframes corresponding to the uplink subframe n for each cell, Umax denotes a maximum value from among the numbers of downlink signals requiring HARQ-ACK responses per cell, and ┌┐ denotes a ceiling function.
Dependencies are inferred from the claim text.