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
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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.
Claims20
A first device configured to perform device-to-device (D2D) communication with a second device by:
- transmitting a plurality of reference signals based on frequency hopping in a wideband to the second device;
- receiving channel state information from the second device;
- determining a plurality of transmission parameters based on the channel state information;
- transmitting the plurality of transmission parameters to the second device;
- and
- transmitting data based on the plurality of transmission parameters to the second device,
- wherein the first device is further configured to:
- obtain at least one measurement value corresponding to a relative velocity between the first device and the second device;
- and
- adjust at least one transmission parameter among the plurality of transmission parameters,
- wherein the channel state information is generated, by the second device, based on interpolation or extrapolation of an N number of reference signals recently received among the plurality of reference signals.
A second device configured to perform device-to-device (D2D) communication with a first device by:
- receiving a plurality of reference signals based on frequency hopping in a wideband from the first device;
- generating channel state information based on interpolation or extrapolation of an N number of reference signals recently received among the plurality of reference signals;
- transmitting the channel state information to the first device;
- receiving a plurality of transmission parameters and data from the first device;
- processing the data based on the plurality of transmission parameters,
- wherein the plurality of transmission parameters includes at least one transmission parameter adjusted by the first device based on a relative velocity between the first device and the second device.
A first device configured to perform device-to-device (D2D) communication with a second device, configured to:
- 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 based on the at least one measurement value;
- transmit a plurality of transmission parameters including the at least one transmission parameter to the second device;
- and
- transmit data to the second device based on the plurality of transmission parameters,
- wherein the first device is further configured to operate in a first mode or a second mode,
- wherein, in the first mode, the first device is configured to:
- receive a plurality of first reference signals from the second device;
- estimate a channel state based on the plurality of first reference signals;
- and
- determine the plurality of transmission parameters based on the channel state;
- and
- wherein, in the second mode, the first device is configured to:
- transmit at least one second reference signal to the second device;
- receive channel state information from the second device corresponding to the at least one second reference signal;
- and
- determine the plurality of transmission parameters based on the channel state information,
- wherein the plurality of first reference signals are transmitted based on antenna switching between a transmitting antenna port and a receiving antenna port by the second device.
Dependencies are inferred from the claim text.