Method for transmitting demodulation reference signal in wireless communication system for supporting narrowband IoT, and device therefor
AssigneeLG Electronics Inc.
InventorsSeunggye Hwang, Yunjung Yi, Kijun Kim, Bonghoe Kim
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Abstract
This specification discloses a method for transmitting a demodulation reference signal (DMRS) in a wireless communication system supporting NB (Narrow-Band)-IoT (Internet of Things), the method performed by a User Equipment (UE) including generating a reference signal sequence used for demodulation; mapping the reference signal sequence to at least one symbol; and transmitting the demodulation reference signal (DMRS) to a base station through a single subcarrier in the at least one symbol.
Claims12
A method of transmitting, by a user equipment (UE), a demodulation reference signal (DMRS) in a wireless communication system supporting NB (Narrow-Band)-IoT (Internet of Things), the method comprising:
- generating a reference signal sequence used for demodulation based on a number of sucarriers within a resource unit being 3;
- mapping the reference signal sequence to at least one symbol;
- and
- transmitting, to a base station, the demodulation reference signal (DMRS) in the at least one symbol,
- wherein a base sequence used in a generation of the reference signal sequence is based on φ(0), φ(1), and φ(2),
- wherein:
- φ(0), φ(1), and φ(2) are 1, 1, and −3, respectively,
- φ(0), φ(1), and φ(2) are 1, −3, and −3, respectively,
- φ(0), φ(1), and φ(2) are 1, 3, and 1, respectively,
- φ(0), φ(1), and φ(2) are 1, −1, and 1, respectively,
- φ(0), φ(1), and φ(2) are 1, 1, and 3, respectively,
- φ(0), φ(1), and φ(2) are 1, 3, and 3, respectively,
- φ(0), φ(1), and φ(2) are 1, −1, and −1, respectively, or
- φ(0), φ(1), and φ(2) are 1, 1, and −1, respectively.
A User Equipment (UE) configured to transmit a demodulation reference signal (DMRS) in a wireless communication system supporting NB (Narrow-Band)-IoT (Internet of Things), the UE comprising:
- at least one transceiver for transmitting and receiving a radio signal;
- and
- at least one processor for controlling the at least one transceiver,
- wherein the at least one processor controls to:
- generate a reference signal sequence used for demodulation based on a number of sucarriers within a resource unit being 3;
- map the reference signal sequence to at least one symbol;
- and
- transmit, to a base station, the demodulation reference signal (DMRS) in the at least one symbol,
- wherein a base sequence used in a generation of the reference signal sequence is based on φ(0), φ(1), and φ(2),
- wherein:
- φ(0), φ(1), and φ(2) are 1, 1, and −3, respectively,
- φ(0), φ(1), and φ(2) are 1, −3, and −3, respectively,
- φ(0), φ(1), and φ(2) are 1, 3, and 1, respectively,
- φ(0), φ(1), and φ(2) are 1, −1, and 1, respectively,
- φ(0), φ(1), and φ(2) are 1, 1, and 3, respectively,
- φ(0), φ(1), and φ(2) are 1, 3, and 3, respectively,
- φ(0), φ(1), and φ(2) are 1, −1, and −1, respectively, or
- φ(0), φ(1), and φ(2) are 1, 1, and −1, respectively.
Dependencies are inferred from the claim text.