CPC H04W 76/14 (2018.02) [H04B 7/01 (2013.01); H04B 7/0626 (2013.01); H04L 1/0003 (2013.01); H04W 24/10 (2013.01); H04W 72/51 (2023.01)] | 18 Claims |
1. A method of performing device-to-device (D2D) communication by a first device, the method comprising:
in a first mode:
receiving at least one first reference signal from a second device;
estimating a channel state based on the at least one first reference signal; and
determining 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:
obtaining at least one measurement value corresponding to a relative velocity between the first device and the second device;
adjusting at least one transmission parameter, among the plurality of transmission parameters, based on the at least one measurement value;
providing the adjusted at least one transmission parameter to the second device; and
transmitting data to the second device based on the adjusted at least one transmission parameter,
wherein the first mode is a channel reciprocity mode and the second mode is a channel state information feedback mode.
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