Patent ID: 9730194
Date: 2017-08-08
CPC Classifications: H04J,H04L,H04W

Claim:
1. A terminal apparatus that communicates with a base station apparatus, comprising: downlink control channel detection circuitry; response information transmission circuitry; and memory associated with the downlink control channel detection circuitry and the response information transmission circuitry; wherein the downlink control channel detection circuitry monitors a Physical Downlink Control CHannel (PDCCH) and an Enhanced Physical Downlink Control CHannel (EPDCCH); the response information transmission circuitry transmits Hybrid Automatic Repeat request (HARQ) response information; downlink control information which is transmitted in the PDCCH comprises at least a field for downlink resource block assignment; downlink control information which is transmitted in the EPDCCH comprises, in addition to the field for downlink resource block assignment, at least a field for specifying a Physical Uplink Control CHannel (PUCCH) resource that is for transmitting the HARQ response information; and the response information transmission circuitry transmits, for a Physical Downlink Shared CHannel (PDSCH) related to the PDCCH, the HARQ response information, using a plurality of PUCCH resources, one of the plurality of PUCCH resources being determined on the basis of a sum of an index of an element which is one of a plurality of elements that construct the PDCCH and a value which is common in a cell, and another one of the plurality of PUCCH resources being determined on the basis of a sum of the index, the value, and one.