Method and apparatus for performing uplink transmission for NB-IoT in wireless communication system
AssigneeLG Electronics Inc.
InventorsYunjung Yi, Bonghoe Kim, Byounghoon Kim
Life of this patent
Estimating the term…
Abstract
A method and apparatus for transmitting a physical uplink shared channel (PUSCH) and a demodulation reference signal (DM-RS) in a wireless communication system is provided. A narrowband internet-of-things (NB-IoT) user equipment (UE) configures a set of resource units with at least one tone for uplink transmission in NB-IoT, transmits the PUSCH by using the set of resource units, and transmits the DM-RS used for demodulating the PUSCH by a network in the set of resource units.
Claims14
A method for transmitting data and a demodulation reference signal (DM-RS) by a narrowband internet-of-things (NB-IoT) user equipment (UE) in a wireless communication system, the method comprising:
- configuring a resource unit for a physical uplink shared channel (PUSCH) for the NB-IoT UE, wherein the resource unit consists of a single tone in a frequency domain;
- mapping the data and the DM-RS to the resource unit;
- transmitting the data and the DM-RS to a network,
- wherein the DM-RS is phase-rotated by π/2 if the data is modulated by π/2 binary phase shift keying (BPSK), and
- wherein the DM-RS is phase-rotated by π/4 if the data is modulated by π/4 quadrature phase shift keying (QPSK).
A narrowband internet-of-things (NB-IoT) user equipment (UE) in a wireless communication system, the NB-IoT UE comprising:
- a memory;
- a transceiver;
- and
- a processor, coupled to the memory and the transceiver, that:
- configures at least one resource unit for a physical uplink shared channel (PUSCH) for the NB-IoT UE, wherein the resource unit consists of a single tone in a frequency domain,
- maps data and a demodulation reference signal (DM-RS) to the at least one resource unit,
- controls the transceiver to transmit the data and the DM-RS to a network,
- wherein the DM-RS is phase-rotated by π/2 if the data is modulated by π/2 binary phase shift keying (BPSK), and
- wherein the DM-RS is phase-rotated by π/4 if the data is modulated by π/4 quadrature phase shift keying (QPSK).
Dependencies are inferred from the claim text.