CROSS-REFERENCE TO RELATED APPLICATIONS

Pursuant to 35 U.S.C. § 119 (a), this application claims the benefit of Korean Patent Application No. 10-2021-0005296 filed on Jan. 14, 2021, No. 10-2021-0006879 filed on Jan. 18, 2021, No. 10-2021-0048451 filed on Apr. 14, 2021, No. 10-2021-0061174 filed on May 12, 2021, No. 10-2021-0119897 filed on Sep. 8, 2021 and No. 10-2021-0151570 filed on Nov. 5, 2021, the contents of which are all hereby incorporated by reference herein in their entirety.

BACKGROUNDS

Field of the Disclosure

The present disclosure relates to wireless communication.

Related Art

As more and more communication devices require more communication capacity, there is a need for improved mobile broadband communication over existing radio access technology. Also, massive machine type communications (MTC), which provides various services by connecting many devices and objects, is one of the major issues to be considered in the next generation communication. In addition, communication system design considering reliability/latency sensitive service/UE is being discussed. The introduction of next generation radio access technology considering enhanced mobile broadband communication (eMBB), massive MTC (mMTC), ultrareliable and low latency communication (URLLC) is discussed. This new technology may be called new radio access technology (new RAT or NR) in the present disclosure for convenience.

In the next-generation wireless communication system, there is ongoing discussion on coverage enhancement (CE) for an uplink signal with respect to a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and other signals. Regarding the CE, there is ongoing discussion on a demodulation reference signal (DMRS) bundle in the PUSCH and PUCCH and a method of performing PUCCH/PUSCH repetition.

SUMMARY

The present specification proposes various coverage enhancement (CE) methods. Specifically, the present specification proposes an uplink power control method of a demodulation reference signal (DMRS) bundle, a power allocation and collision handling method of the DMRS bundle, an uplink power control method of the DMRS bundle according to user equipment (UE) capability, and a method of applying a timing advance (TA) command of the DMRS bundle.

According to the present specification, it is possible to resolve misunderstandings between a UE and a base station (BS) with respect to uplink transmission for CE. Therefore, it is possible to increase CE efficiency through various CE methods proposed in the present specification.

The effects that can be obtained through specific examples of the present disclosure are not limited to the effects listed above. For example, there may be various technical effects that a person having ordinary skill in the related art can understand or derive from the present disclosure. Accordingly, specific effects of the present disclosure are not limited to those explicitly described in the present disclosure and may include various effects that can be understood or derived from the technical features of the present disclosure.

