| CPC H04W 72/25 (2023.01) [H04L 5/0048 (2013.01); H04W 72/0446 (2013.01)] | 11 Claims |

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1. A terminal, comprising:
control circuitry, which, in operation, determines mapping of certain control information to a data channel of sidelink based on mapping of a reference signal in the data channel and mapping of a control channel, the certain control information being related to first control information and being referred to as second control information, the first control information being transmitted in the sidelink, wherein
the control circuitry determines the mapping of the second control information to the data channel using, as a reference, a time resource where the reference signal is mapped, and
when a first reference signal is not mapped to a first time resource and a second reference signal is mapped to a second time resource in the data channel, the control circuitry determines the mapping of the second control information to the data channel using the second time resource as the reference; and
transmission circuitry, which, in operation, transmits the data channel in accordance with the determined mapping.
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