US Patent No. 10,433,296


Patent No. 10,433,296
Issue Date October 01, 2019
Title User Terminal, Radio Base Station And Radio Communication Method
Inventorship Kazuki Takeda, Tokyo (JP)
Kazuaki Takeda, Tokyo (JP)
Hideaki Takahashi, Tokyo (JP)
Hiromasa Umeda, Tokyo (JP)
Satoshi Nagata, Tokyo (JP)
Assignee NTT DOCOMO, INC., Tokyo (JP)

Claim of US Patent No. 10,433,296

1. A user terminal that carries out radio communication with a primary cell and a secondary cell, the user terminal comprising:a receiver that, when a connection is established with a TDD cell, receives configuration information about a given DL/UL configuration that is selected from a plurality of DL/UL configurations; and
a processor that controls transmission and reception to and from the TDD cell based on the received DL/UL configuration,
wherein, if the primary cell is an FDD cell and DL communication is applied to the secondary cell throughout a period to which the configuration information about the DL/UL configuration is applied, then the processor feeds back an A/N in response to each DL subframe of the secondary cell by using a given UL subframe of a primary cell.