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US 11,895,718 B2Granted
Method of and apparatus for transmitting data based on channel state in device-to-device communication
AssigneeSamsung Electronics Co., Ltd.
InventorsKunil Yum, Yangsoo Kwon, Jungmin Park, Junho Lee
Life of this patent
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Abstract
A method of performing device-to-device (D2D) communication by a first device includes obtaining at least one measurement value corresponding to a relative velocity between the first device and a second device; adjusting at least one transmission parameter 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.
Claims18
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.
16 more elements
A method of performing device-to-device (D2D) communication by a first device, the method comprising:
- obtaining at least one measurement value corresponding to a relative velocity between the first device and a second device;
- adjusting at least one transmission parameter based on the at least one measurement value;
- providing the adjusted at least one transmission parameter to the second device;
- transmitting data to the second device based on the adjusted at least one transmission parameter;
- receiving an acknowledgement corresponding to the transmitting of the data, from the second device;
- and
- measuring an error rate based on the acknowledgement,
- wherein the adjusting the at least one transmission parameter comprises:
- when the error rate is less than a first threshold value, adjusting the at least one transmission parameter to correspond to a first data rate;
- when the error rate is greater than a second threshold value, adjusting the at least one transmission parameter to correspond to a second data rate;
- and
- adjusting at least one of the first threshold value and the second threshold value based on the at least one measurement value,
- wherein the first data rate is greater than the second data rate.
10 more elements
A method of performing device-to-device (D2D) communication by a second device, the method comprising:
- transmitting at least one first reference signal to a first device in a first mode;
- receiving, from the first device, at least one transmission parameter adjusted by the first device based on a relative velocity between the first device and the second device;
- and
- receiving data from the first device based on the at least one transmission parameter received from the first device,
- wherein the at least one transmission parameter is included in a plurality of transmission parameters determined by the first device based on an channel state in the first mode,
- wherein the channel state is estimated by the first device based on the at least one first reference signal in the first mode,
- wherein the method further comprises:
- receiving at least one second reference signal from the first device in a second mode;
- generating channel state information based on the at least one second reference signal in the second mode;
- and
- providing the channel state information to the first device in the second mode,
- wherein the plurality of transmission parameters is determined by the first device based on the channel state information in the second mode, and
- wherein the first mode is a channel reciprocity mode and the second mode is a channel state information feedback mode.
10 more elements
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.
17 more elements
Dependencies are inferred from the claim text.