EP3379756B1

5G,4G

Title

COMMUNICATION APPARATUS AND RETRANSMISSION CONTROL METHOD

Application Number:

EP20180172372

Publication Date:

02-10-2019

Current Assignee:

SUN PATENT TRUST

Family ID:

43544159

Application Date:

06-08-2010

Publication Country:

US

View on Espacenet

Priority Date:

07-08-2009

Declaring Company:

PANASONIC CORP , SUN PATENT TRUST

Abstract  Abstract

Provided are a communcation apparatus and a corresponding retransmission control method, the communication apparatus communicating with a terminal configured with one or more downlink component carrier(s), the communication apparatus comprising:
a transmitting section configured to transmit, to the terminal, downlink assignment information indicating one or more resources for downlink data, each of the one or more resources being assigned to one of the one or more downlink component carrier(s), and configured to transmit the downlink data to the terminal;
a receiving section configured to receive one or more response signals for the downlink data, which is transmitted from the terminal,
wherein:
each response signal denotes an outcome of decoding downlink data, or denotes a Discontinuous Transmission, DTX, representing that the outcome is not transmitted;
when downlink component carriers including a first downlink component carrier and a second downlink component carrier are configured, response signals for a plurality of downlink data in the downlink component carriers are transmitted using at least one phase point and at least one resource index of at least one uplink control channel depending on an outcome of decoding each of the plurality of downlink data; and
a first outcome that a first response signal for downlink data in the first downlink component carrier denotes with a first phase point, with which a second response signal for downlink data in the second downlink component carrier denotes the DTX, is the same as the first outcome, which a third response signal for downlink data in the first downlink component carrier denotes with the same first phase point when only the first downlink component carrier is configured, such that:
when the first downlink component carrier and the second component carrier are configured, an acknowledgment, ACK, for downlink data in the first downlink component carrier and a DTX for downlink data in the second downlink component carrier are denoted by the first response signal and the second response signal with the first phase point; and
when only the first downlink component carrier is configured, an ACK for downlink data in the first downlink component carrier is denoted by the third response signal with the same first phase point.

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