Search

US-20260129674-A1 - RESOURCES FOR JOINT CHANNEL ESTIMATION OF REPETITIONS

US20260129674A1US 20260129674 A1US20260129674 A1US 20260129674A1US-20260129674-A1

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of a UE capability of the UE for maintaining uplink continuity of Msg3 repetitions. The UE may receive a configuration specifying resources that indicate Msg3 repetition is to be expected. The UE may transmit a physical random access channel (PRACH) message in the resources. The resources may include preamble resources that are dedicated for joint channel estimation of Msg3 repetitions or for joint channel estimation of PRACH repetitions. Numerous other aspects are described.

Inventors

  • Mahmoud Taherzadeh Boroujeni
  • Tao Luo
  • Junyi Li

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260507
Application Date
20260105

Claims (20)

  1. 1 . A network entity for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more memories comprising instructions executable by the one or more processors to cause the network entity to: receive a physical random access channel (PRACH) message in resources that indicate Msg3 repetition is to be expected; receive Msg3 repetitions; and perform joint channel estimation based on the Msg3 repetitions.
  2. 2 . The network entity of claim 1 , wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to: receive an indication of a user equipment (UE) capability for maintaining uplink continuity of the Msg3 repetitions for the joint channel estimation; and transmit a configuration specifying the resources based at least in part on the UE capability.
  3. 3 . The network entity of claim 1 , wherein the resources include frequency resources that are separate from other frequency resources in an active bandwidth part.
  4. 4 . The network entity of claim 3 , wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to determine that the Msg3 repetition is to be expected based on use of the frequency resources in combination with PRACH repetitions.
  5. 5 . The network entity of claim 1 , wherein the resources include preamble resources that are dedicated for joint channel estimation of Msg3 repetitions.
  6. 6 . The network entity of claim 1 , wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to: receive PRACH repetitions; and perform joint channel estimation based on the PRACH repetitions.
  7. 7 . The network entity of claim 1 , wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to transmit a configuration that indicates a configured time domain window that is associated with Msg3 repetition, and wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to perform joint channel estimation only within the configured time domain window.
  8. 8 . A network entity for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more memories comprising instructions executable by the one or more processors to cause the network entity to: receive an indication of a user equipment (UE) capability of a UE for maintaining uplink continuity of contention-free random access (CFRA) uplink channel repetitions for joint channel estimation; receive the CFRA repetitions; and perform joint channel estimation based on the CFRA uplink repetitions.
  9. 9 . The network entity of claim 8 , wherein the memory further comprises instructions executable by the one or more processors to cause the UE to perform joint channel estimation further based on a configuration for the CFRA uplink channel repetitions.
  10. 10 . The network entity of claim 8 , wherein the CFRA uplink repetitions include physical random access channel (PRACH) repetitions.
  11. 11 . The network entity of claim 8 , wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to transmit a configuration that indicates a time domain window for CFRA uplink repetition, and wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to perform joint channel estimation only during the time domain window.
  12. 12 . The network entity of claim 11 , wherein the time domain window for CFRA uplink repetition matches a time domain window used for other uplink channel communications.
  13. 13 . The network entity of claim 11 , wherein the time domain window for CFRA uplink repetition does not match a time domain window used for other uplink channel communications.
  14. 14 . The network entity of claim 11 , wherein a size of the time domain window for CFRA uplink repetition matches a smaller of a size of a time domain window for other uplink channel communications or a configured time domain window size.
  15. 15 . A method of wireless communication performed by a network entity, comprising: receiving a physical random access channel (PRACH) message in resources that indicate Msg3 repetition is to be expected; receiving Msg3 repetitions; and performing joint channel estimation based on the Msg3 repetitions.
  16. 16 . The method of claim 15 , further comprising: receiving an indication of a user equipment (UE) capability for maintaining uplink continuity of the Msg3 repetitions for the joint channel estimation; and transmitting a configuration specifying the resources based at least in part on the UE capability.
  17. 17 . The method of claim 15 , wherein the resources include frequency resources that are separate from other frequency resources in an active bandwidth part.
  18. 18 . The method of claim 15 , wherein the resources include preamble resources that are dedicated for joint channel estimation of the Msg3 repetitions.
  19. 19 . The method of claim 15 , further comprising: receiving PRACH repetitions; and performing joint channel estimation based on the PRACH repetitions.
  20. 20 . The method of claim 15 , further comprising: transmitting a configuration that indicates a configured time domain window that is associated with Msg3 repetition; and performing joint channel estimation only within the configured time domain window.

Description

RELATED APPLICATION This application is a division of U.S. patent application Ser. No. 17/810,061, filed Jun. 30, 2022, assigned U.S. Pat. No. 12,520,342 with an issue date of Jan. 6, 2026, which is incorporated herein by reference in its entirety. FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for indicating resources for joint channel estimation of repetitions. BACKGROUND Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). A wireless network may include one or more base stations that support communication for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink communications and uplink communications. “Downlink” (or “DL”) refers to a communication link from the base station to the UE, and “uplink”(or “UL”) refers to a communication link from the UE to the base station. The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and/or global level. New Radio (NR), which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and/or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. SUMMARY Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include transmitting an indication of a UE capability of the UE for maintaining uplink continuity of Msg3 repetitions. The method may include receiving a configuration specifying resources that indicate Msg3 repetition is to be expected. The method may include transmitting a physical random access channel (PRACH) message in the resources. Some aspects described herein relate to a method of wireless communication performed by a network entity. The method may include receiving a PRACH message in resources that indicate Msg3 repetition is to be expected. The method may include receiving Msg3 repetitions. The method may include performing joint channel estimation based on the Msg3 repetitions. Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include transmitting a capability indication of a UE capability of the UE for maintaining uplink continuity of contention-free random access (CFRA) uplink channel repetitions for joint channel estimation. The method may include transmitting the CFRA uplink channel repetitions. Some aspects described herein relate to a method of wireless communication performed by a network entity. The method may include receiving an indication of a UE capability of a UE for maintaining uplink continuity of CFRA uplink channel repetitions for joint channel estimation. The method may include receiving the CFRA repetitions. The method may include performing joint channel estimation based on the CFRA uplink repetitions. Some aspects described herein relate to a UE for wireless communication. The UE may include memory, one or more processors coupled to the memory, and instructions stored in the memory and executable by the one or more processors. The instructions may be executable by the one or more processors to cause the UE to transmit an indication of a UE capability of the UE for maintaining uplink continuity