Method for transmitting reference signal in V2X communication and apparatus therefor
AssigneeLG Electronics Inc.
InventorsYoungtae Kim, Hanbyul Seo, Hyukjin Chae, Kijun Kim, Inkwon Seo
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Abstract
A demodulation reference signal (DMRS) transmission method in a vehicle-to-something (V2X) communication is disclosed. The DMRS in V2X communication is mapped onto four symbols in at least one subframe from among a plurality of subframes. For correction of the frequency offset, the four symbols may comprise a symbol pair located at least two symbol intervals.
Claims14
A method for transmitting a message based on a demodulation reference signal (DMRS) by a user equipment (UE) in vehicle-to-something (V2X) communication, the method comprising:
- mapping the DMRS in one or more subframes among a plurality of subframes, based on a first mapping rule;
- mapping the DMRS in remaining subframes except the one or more subframes among the plurality of subframes, based on a second mapping rule different from the first mapping rule;
- and
- transmitting the message in the plurality of subframes, based on the DMRS,
- wherein the DMRS is mapped to four first symbols in one subframe based on the first mapping rule,
- wherein the first symbols comprise at least one symbol pair with an interval equal to or less than two symbols,
- wherein the one or more subframes in which the DMRS is mapped based on the first mapping rule are used for offset correction and, the remaining subframes in which the DMRS is mapped based on the second mapping rule are used for channel estimation, and
- wherein an offset correction value is obtained from the one or more subframes in which the DMRS is mapped based on the first mapping rule and, the offset correction value is used for the plurality of subframes in transmission of the message.
A user equipment (UE) for transmitting a message based on a demodulation reference signal (DMRS) in vehicle-to-something (V2X) communication, the UE comprising:
- a transceiver;
- and
- at least one processor configured to control the transceiver,
- wherein the at least one processor is configured to:
- map the DMRS in one or more subframes among a plurality of subframes, based on a first mapping rule;
- map the DMRS in remaining subframes except the one or more subframes among the plurality of subframes, based on a second mapping rule different from the first mapping rule;
- and
- transmit the message in the plurality of subframes, based on the DMRS,
- wherein the DMRS is mapped to four first symbols in one subframe based on the first mapping rule,
- wherein the first symbols comprise at least one symbol pair with an interval equal to or less than two symbols,
- wherein the one or more subframes in which the DMRS is mapped based on the first mapping rule are used for offset correction and, the remaining subframes in which the DMRS is mapped based on the second mapping rule are used for channel estimation, and
- wherein an offset correction value is obtained from the one or more subframes in which the DMRS is mapped based on the first mapping rule and, the offset correction value is used for the plurality of subframes in transmission of the message.
Dependencies are inferred from the claim text.