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US-12628204-B2 - Signal transmission/reception method for wireless communication, and apparatus therefor

US12628204B2US 12628204 B2US12628204 B2US 12628204B2US-12628204-B2

Abstract

According to one embodiment of the present invention, a terminal can acquire an RACH configuration for at least one from among a plurality of UL BWPs, select an initial UL BWP from among the plurality of UL BWPs, and transmit a random access preamble on the basis of the RACH configuration on the selected initial UL BWP, the plurality of UL BWPs can include: a first UL BWP related to only a first type terminal of which the capability is reduced to support a bandwidth that is less than a predetermined bandwidth; and a second UL BWP related to a second type terminal that is different from the first type terminal, and the terminal, as the first type terminal, can be configured to select the first UL BWP or the second UL BWP as the initial UL BWP according to whether a predetermined condition is satisfied.

Inventors

  • Youngdae Lee
  • Jaehyung Kim
  • Suckchel YANG
  • Seonwook Kim
  • Seunggye HWANG

Assignees

  • LG ELECTRONICS INC.

Dates

Publication Date
20260512
Application Date
20220927
Priority Date
20200515

Claims (7)

  1. 1 . A method performed by a reduced capability (RedCap)-user equipment (R-UE), the method comprising: obtaining (i) information regarding a initial downlink (DL) bandwidth part (BWP), (ii) information regarding a RedCap-dedicated initial DL BWP, (iii) information regarding a normal initial uplink (UL) BWP and (iv) information regarding a RedCap-dedicated initial UL BWP; and based on the RedCap-dedicated initial UL BWP being configured, performing a random access procedure, wherein the random access procedure comprises: transmitting a random access preamble; and monitoring a physical downlink control channel (PDCCH), wherein the random access preamble is determined based on a reference signal received signal (RSRP) measurement for a synchronization signal block (SSB) associated with the initial DL BWP, wherein, after performing the RSRP measurement for the SSB associated with the initial DL BWP, the PDCCH is monitored in a DL BWP determined as the initial DL BWP or the RedCap-dedicated initial DL BWP, and wherein the DL BWP for monitoring the PDCCH is determined based on whether the random access procedure is performed for requesting system information.
  2. 2 . The method of claim 1 , wherein a first random access channel (RACH) configuration is configured for the RedCap-dedicated initial UL BWP and a second RACH configuration is configured for the initial UL BWP.
  3. 3 . The method of claim 2 , wherein the R-UE transmits the random access preamble based on the first RACH configuration.
  4. 4 . A non-transitory processor-readable storage medium having stored thereon a program for executing the method of claim 1 .
  5. 5 . A reduced capability (RedCap)-device (R-device) comprising: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, wherein the operations performed by the processor comprise: obtaining (i) information regarding a initial downlink (DL) bandwidth part (BWP), (ii) information regarding a RedCap-dedicated initial DL BWP, (iii) information regarding a initial uplink (UL) BWP and (iv) information regarding a RedCap-dedicated initial UL BWP; and based on the RedCap-dedicated initial UL BWP being configured, performing a random access procedure, wherein the random access procedure comprises: transmitting a random access preamble; and monitoring a physical downlink control channel (PDCCH), wherein the random access preamble is determined based on a reference signal received signal (RSRP) measurement for a synchronization signal block (SSB) associated with the initial DL BWP, wherein, after performing the RSRP measurement for the SSB associated with the initial DL BWP, the PDCCH is monitored in a DL BWP determined as the initial DL BWP or the RedCap-dedicated initial DL BWP, and wherein the DL BWP for monitoring the PDCCH is determined based on whether the random access procedure is performed for requesting system information.
  6. 6 . The R-device of claim 5 , further comprising a transceiver configured to transmit and receive a radio signal under control of the processor, wherein the R-device is a reduced capability-user equipment (R-UE).
  7. 7 . The R-device of claim 5 , wherein the R-device is an application-specific integrated circuit (ASIC) or a digital signal processing device.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is a continuation of International Application No. PCT/KR2021/006135, filed on May 17, 2021, which claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2020-0058683, filed on May 15, 2020, the contents of all of which are hereby incorporated by reference herein in their entireties. TECHNICAL FIELD The present disclosure relates to wireless communication, and more particularly, to a method of transmitting or receiving an uplink/downlink signal in a wireless communication system and apparatus therefor. BACKGROUND ART Generally, a wireless communication system is developing to diversely cover a wide range to provide such a communication service as an audio communication service, a data communication service and the like. The wireless communication is a sort of a multiple access system capable of supporting communications with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). For example, the multiple access system may be any of 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. DISCLOSURE Technical Problem The object of the present disclosure is to provide a method of transmitting and receiving signals more efficiently in a wireless communication system where different types of user equipments (UEs) operate. The objects of present disclosure are not limited to what has been particularly described hereinabove, and other objects that the present disclosure could achieve will be more clearly understood from the following detailed description. Technical Solution In an aspect of the present disclosure, there is provided a method of performing a random access procedure by a user equipment (UE) in a 3rd generation partnership project (3GPP) based wireless communication system. The method may include: obtaining a random access channel (RACH) configuration for at least one of a plurality of uplink (UL) bandwidth parts (BWPs); selecting an initial UL BWP from among the plurality of UL BWPs; and transmitting a random access preamble on the initial UL BWP selected from among the plurality of UL BWPs based on the RACH configuration. The plurality of UL BWPs may include a first UL BWP related only to a first type of UE with reduced capability to support a smaller bandwidth than a predetermined bandwidth and a second UL BWP related to a second type of UE different from the first type of UE. The UE may be the first type of UE and configured to select the first UL BWP or the second UL BWP as the initial UL BWP depending on whether a predetermined condition is satisfied. Based on that the predetermined condition is not satisfied even though the UE is the first type of UE, the UE may be configured to select the second UL BWP as the initial UL BWP. Based on that capability of the UE does not support the second UL BWP, the UE may be configured to determine that the predetermined condition is satisfied and select the first UL BWP as the initial UL BWP. Based on that capability of the UE supports the second UL BWP even though the UE is the first type of UE, the UE may be configured to determine that the predetermined condition is not satisfied and select the second UL BWP as the initial UL BWP. Based on that the first UL BWP is available for the UE, the UE may be configured to determine that the predetermined condition is satisfied and select the first UL BWP as the initial UL BWP. Based on that the first UL BWP is not available for the UE even though the UE is the first type of UE, the UE may be configured to determine that the predetermined condition is not satisfied and select the second UL BWP as the initial BWP. Based on that the first UL BWP is available for the UE, the UE may be configured to determine that the predetermined condition is satisfied regardless of availability of the second UL BWP and select the first UL BWP as the initial UL BWP. The UE may be configured determine availability of the first UL BWP based on higher layer information obtained from a network. In another aspect of the present disclosure, there is provided a processor-readable storage medium having stored thereon a program for executing the above-described method. In another aspect of the present disclosure, there is provided a device for 3GPP based wireless communication. The device may include: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions. The operations performed by the processor may include: obtaining a RACH configuration for at least one of a plurality of UL BWPs; selecting an initial UL BWP from among the plurality of UL BWPs; and transmitting a random access preamble on the initial UL BWP sel