Sharp Kabushiki Kaisha Corporation

Fg Innovation Company Limited

Hui-Fa Lin

Shoichi Suzuki

Wataru Ouchi

Tomoki Yoshimura

Taewoo Lee

Toshizo Nogami

Daiichiro Nakashima

Liqing Liu

A communication method used for a terminal device is provided. The communication method comprises triggering transmission of a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook; and when transmission of a second HARQ-ACK codebook is triggered before the first HARQ-ACK codebook has been transmitted, canceling the transmission of the first HARQ-ACK codebook; and transmitting the second HARQ-ACK codebook.

Method and apparatus for performing HARQ-ACK transmission

The present invention can perform communication efficiently. In a case that (1) the terminal apparatus is configured to monitor a first PDCCH candidate in a CSS and a second PDCCH candidate in a USS according to a DCI format with a C-RNTI, (2) a set of resource elements constituting the first PDCCH candidate is the same as a set of resource elements constituting the second PDCCH candidate, (3) a higher layer parameter is not set, and/or (4) the size of the DCI format corresponding to the first PDCCH candidate is the same as the size of the DCI format corresponding to the second PDCCH candidate, a terminal apparatus regards that a PDCCH with the DCI format is transmitted or received in the first PDCCH candidate when the PDCCH with the DCI format is received in the second PDCCH candidate.

Terminal apparatus, base station apparatus and communication method

A terminal apparatus includes: a higher layer processing unit configured to configure, in the serving cell, the first set of downlink resource blocks (DL RBs) continuous in a frequency domain and the second set, which is different from the first set, of DL RBs continuous in the frequency domain; and a receiver configured to monitor a first PDCCH with a first DCI format in the first set, the first set being activated, and receive a PDSCH scheduled according to the first DCI format in the first set, wherein in a case that the number of different sizes of DCI formats monitored by using a C-RNTI in the serving cell exceeds three, a size of a first frequency domain resource allocation field included in the first DCI format is provided based on the number of the RBs in the second set, and the first frequency domain resource allocation field is used for scheduling the RBs in the first set.

User equipment, base station device, and communication method for DCI-based resource allocation

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Sakai, Japan

Hui-Fa Lin