TECHNICAL FIELD

The present invention relates to a wireless communication system, and more particularly, to a method of transmitting uplink control information to a base station by a user equipment in a wireless communication system where various numerology is applicable and device for supporting the same.

More specifically, the present invention is directed to a method performed by a user equipment for mapping uplink resource information and transmitting the uplink resource information on a physical uplink shared channel.

BACKGROUND ART

Wireless access systems have been widely deployed to provide various types of communication services such as voice or data. In general, a wireless access system is a multiple access system that supports communication of multiple users by sharing available system resources (a bandwidth, transmission power, etc.) among them. For example, multiple access systems include a Code Division Multiple Access (CDMA) system, a Frequency Division Multiple Access (FDMA) system, a Time Division Multiple Access (TDMA) system, an Orthogonal Frequency Division Multiple Access (OFDMA) system, and a Single Carrier Frequency Division Multiple Access (SC-FDMA) system.

As a number of communication devices have required higher communication capacity, the necessity of the mobile broadband communication much improved than the existing radio access technology (RAT) has increased. In addition, massive machine type communications (MTC) capable of providing various services at anytime and anywhere by connecting a number of devices or things to each other has been considered in the next generation communication system. Moreover, a communication system design capable of supporting services/UEs sensitive to reliability and latency has been discussed.

As described above, the introduction of the next generation RAT considering the enhanced mobile broadband communication, massive MTC, Ultra-reliable and low latency communication (URLLC), and the like has been discussed.

DISCLOSURE OF THE INVENTION

Technical Task

An object of the present invention is to provide a method of transmitting uplink control information by a user equipment in a newly proposed communication system.

In particular, another object of the present invention is to provide a method performed by a user equipment for uplink control channel mapping and operation performed by the user equipment for transmitting uplink control information when the user equipment intends to transmit the uplink control information on a physical uplink shared channel in the newly proposed communication system.

It will be appreciated by persons skilled in the art that the objects that could be achieved with the present disclosure are not limited to what has been particularly described hereinabove and the above and other objects that the present disclosure could achieve will be more clearly understood from the following detailed description.

Technical Solution

The present invention provides a method of transmitting uplink control information by a user equipment in a wireless communication system and devices therefor.

In an aspect of the present invention, provided herein is a method of transmitting uplink control information (UCI) to a base station (BS) by a user equipment (UE) in a wireless communication system, including: mapping the UCI to a physical uplink shared channel (PUSCH), wherein acknowledgement information included in the UCI is mapped to the PUSCH by applying either rate-matching or puncturing to resources for transmitting the acknowledgement information on the PUSCH based on a size of the acknowledgement information; and transmitting the mapped UCI on the PUSCH

In another aspect of the present invention, provided herein is a user equipment (UE) for transmitting uplink control information (UCI) to a base station (BS) in a wireless communication system, including: a transmitter; and a processor connected to the transmitter, wherein the processor is configured to: map the UCI to a physical uplink shared channel (PUSCH), wherein acknowledgement information included in the UCI is mapped to the PUSCH by applying either rate-matching or puncturing to resources for transmitting the acknowledgement information on the PUSCH based on a size of the acknowledgement information; and transmit the mapped UCI on the PUSCH.

In this case, when the size of the acknowledgement information is more than a predetermined value, the acknowledgement information may be mapped to the PUSCH by applying the rate-matching to the resources for transmitting the acknowledgement information on the PUSCH. On the other hand, when the size of the acknowledgement information is equal to or less than the predetermined value, the acknowledgement information may be mapped to the PUSCH by applying the puncturing to the resources for transmitting the acknowledgement information on the PUSCH.

At this time, the acknowledgement information may not be mapped to any symbol before a symbol where a first demodulation reference signal (DM-RS) is transmitted on the PUSCH.

In addition, when channel state information (CSI) is included in the UCI, the CSI may be mapped to the PUSCH by applying the rate-matching to resources for transmitting the CSI on the PUSCH.

In this case, the CSI may be mapped to resources except a predetermined amount of resources which are reserved for the acknowledgement information on the PUSCH.

Moreover, the size of the acknowledgement information may be determined based on an uplink downlink assignment index (DAI) value in uplink grant received from the BS.

Further, the amount of the resources for transmitting the acknowledgement information on the PUSCH may be determined based on a first beta parameter, and if among a plurality of sets configured through higher layer signaling, one set is indicated by uplink grant, the first beta parameter may correspond to a beta parameter that is determined based on the size of the acknowledgement information among a plurality of beta parameters included in the one set indicated by the uplink grant.

Additionally, part or all of the UCI may be mapped to resources in a symbol where a demodulation reference signal (DM-RS) is transmitted on the PUSCH.

Additionally, when the PUSCH is a semi persistence scheduling (SPS) PUSCH, the rate-matching or puncturing may be performed based on maximum UCI payload dedicated to the SPS PUSCH.

Additionally, when the PUSCH is a semi persistence scheduling (SPS) PUSCH, the rate-matching or puncturing may be performed based on a beta offset value included in downlink control information that activates the SPS PUSCH.

It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed.

Advantageous Effects

As is apparent from the above description, the embodiments of the present disclosure have the following effects.

According to the present invention, when a UE intends to map acknowledgement information in uplink control information to a physical uplink shared channel, the UE can perform rate-matching or puncturing according to size of the acknowledgement information and then map the acknowledgement information to the physical uplink shared channel.

In addition, the UE can apply a more efficient mapping method in terms of the performance of the physical uplink shared channel or complexity thereof and then transmit an uplink control channel including the acknowledgement information on the physical uplink shared channel.

The effects that can be achieved through the embodiments of the present invention are not limited to what has been particularly described hereinabove and other effects which are not described herein can be derived by those skilled in the art from the following detailed description. That is, it should be noted that the effects which are not intended by the present invention can be derived by those skilled in the art from the embodiments of the present invention.

