Patent ID: 11903055
Assignee: NTT DOCOMO, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A communication method performed by a terminal, the communication method comprising:
receiving allocation information of reference signals from a base station, the reference signals being used in a sidelink communication that is a direct communication between the terminal and another terminal;
autonomously switching a transmission density in a time domain and a transmission density in a frequency domain of the reference signals, based on the allocation information of the reference signals; and
transmitting the reference signals, whose transmission density in the time domain and transmission density in the frequency domain have been switched, to another terminal,
wherein a transmission pattern of the reference signals, the transmission pattern being specified based on the allocation information of the reference signals, includes an interval of resource elements in which the reference signals are allocated in the time domain and the frequency domain in a resource pool.