BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to wireless communication and, more particularly, to a method for performing uplink communication by a terminal in a wireless communication system and a terminal using the method.

Related Art

As communication devices have increasingly required greater communication capacity, the necessity for improved mobile broadband communication, relative to an existing radio access technology (RAT), has emerged. Also, massive machine type communications (MTC), which provides many different services by connecting multiple devices and objects, is also one of the major issues to be considered in next generation communications.

A communication system considering services or terminals vulnerable to reliability or latency has also been discussed, and a next-generation RAT considering improved mobile broadband communication, massive MTC, ultra-reliable and low latency communication (URLLC), and the like, may also be termed a new RAT or new radio (NR).

NR considers communication considering analog beamforming, as well as digital beamforming.

Digital beamforming may be performing precoding at a baseband end, and analog beamforming may be performing precoding at an RF (radio frequency) end. A beam which has passed through digital beamforming may be referred to as a digital beam, and a beam which has passed through analog beamforming may be referred to as an analog beam.

In the NR, when an analog beam-based uplink channel/signal transmission is performed, a method for setting an uplink communication-related parameter capable of obtaining high reliability of uplink channels/signals transmitted through analog beams of different characteristics/environments and effectively operating or scheduling resources for each analog beam is required and a method for uplink communication of a terminal (i.e., user equipment (UE)) based on the method is required.

SUMMARY OF THE INVENTION

An object of the present invention is to provide for performing uplink communication by a terminal in a wireless communication system and a terminal using the method.

In one aspect, provided is a method for performing uplink communication by a terminal in a wireless communication system. The method includes receiving an uplink communication-related parameter independently configured for each analog beam and performing the uplink communication based on the parameter. When the uplink communication is performed using a specific analog beam, an uplink communication-related parameter configured for the specific analog beam is applied to the uplink communication.

The UE may receive a plurality of analog beams from a base station (BS), and measure the plurality of analog beams and transmit a measurement result of some of the plurality of analog beams to the BS.

The analog beam may include a beam reference signal (BRS).

The beam reference signal may include an identity (ID) distinguished for each analog beam.

The uplink communication-related parameter configured for the specific analog beam may include an offset value which determines a modulation and coding scheme (MCS) applied when uplink control information is applied.

The uplink communication-related parameter configured for the specific analog beam may include at least one of resource of an uplink control channel for transmission of uplink control information, a format of the uplink control channel, a transmission technique of the uplink control channel, and a seed value related to generation of a reference signal sequence of the uplink control channel.

The uplink communication-related parameter configured for the specific analog beam may include at least one of a power offset value applied to transmission of a sounding reference signal (SRS), a power offset value applied for each uplink control channel format, a power offset value applied to an uplink control channel transmit diversity technique, and a power offset value according to a magnitude of uplink control information payload.

The uplink communication-related parameter configured for the specific analog beam may include an uplink semi-persistent scheduling configuration information for each analog beam.

The uplink communication-related parameter configured for the specific analog beam may include at least one of information regarding resource and transmission type of a sounding reference signal (SRS), uplink transmission mode information, and timing advanced (TA) information.

An uplink semi-persistent scheduling operation may be allowed only in some of the plurality of analog beams configured in the terminal.

The uplink communication-related parameter independently configured for each analog beam may be configured to have the same value for some analog beams and different values for the other analog beams.

In another aspect, provided is a user equipment (UE). The UE includes a radio frequency (RF) unit transmitting and receiving a wireless signal and a processor coupled to the RF unit to operate. The processor receives an uplink communication-related parameter independently configured for each analog beam, and performs the uplink communication based on the parameter. When the uplink communication is performed using a specific analog beam, an uplink communication-related parameter configured for the specific analog beam is applied to the uplink communication.

In NR, independent uplink communication-related parameters may be set for each analog beam. Therefore, when analog beam-based uplink channel/signal transmission is performed, high reliability of uplink channels/signals transmitted through analog beams of different characteristics/environments may be obtained and resources may be effectively operated or scheduled for each analog beam.

