Terminal apparatus and response signal transmitting method

摘要

Disclosed are a terminal apparatus and a response signal transmitting method that can reduce the signaling overheads related to a bundling group in a communication system to which a partial bundling is applied. In a terminal (200), a bundling control unit (212), which serves as a generating means for generating a response signal, generates, based on a bundling rule according to which bundling groups are associated with downstream unit bands constituting unit band groups, a bundle of ACK/NACK signals obtained by bundling the error detection results of active downstream unit bands included in the same bundling group, out of active downstream unit band groups constituted by active downstream unit bands.

主权项

1. A terminal device comprising:
a receiving section that receives downlink data transmitted using at least one downlink unit band in a unit band group made up of a plurality of downlink unit bands; a table in which each of the downlink unit bands constituting the unit band group is associated with any one of a plurality of bundling groups based on a bundling rule; a generating section that generates a response signal obtained by bundling error detection results of the downlink unit bands included in the same bundling group; and a transmitting section that transmits the response signal arranged on an uplink control channel corresponding to one of the downlink unit bands associated with the same bundling group, wherein the table is updated based on the bundling rule every time the unit band group is set, the bundling rule is switched from one terminal to another terminal, and the bundling rule is switched according to a distance between a base station and the terminal device.