Patent ID: 11895718
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A first device configured to perform device-to-device (D2D) communication with a second device, the first device comprising:
at least one transceiver; and
at least one processor configured to process a first signal received from the second device through the at least one transceiver and to generate a second signal which is to be transmitted to the second device through the at least one transceiver,
wherein the at least one processor is further configured to:
in a first mode:
receive at least one first reference signal from the second device;
estimate a channel state based on the at least one first reference signal;
determine a plurality of transmission parameters based on the estimated channel state; or

in a second mode:
transmitting at least one second reference signal to the second device;
receiving channel state information from the second device corresponding to the at least one second reference signal; and
determining the plurality of transmission parameters based on the channel state information, and

in the first mode or the second mode:
obtain at least one measurement value corresponding to a relative velocity between the first device and the second device,
adjust at least one transmission parameter, among the plurality of transmission parameters, based on the at least one measurement value,
provide the adjusted at least one transmission parameter to the second device through the at least one transceiver, and
generate the second signal based on the adjusted at least one transmission parameter, and

wherein the first mode is a channel reciprocity mode and the second mode is a channel state information feedback mode.