US-12628089-B2 - Power adjustment for uplink transmissions

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, in accordance with a handover from a source cell to a target cell, an indication of an initial power adjustment state to be used for an initial transmission to the target cell. The UE may perform an initial transmission to the target cell in accordance with the initial power adjustment state. Numerous other aspects are described.

Inventors

• Xiao Feng Wang
• Bharat Shrestha
• Alberto RICO ALVARINO
• Peter Gaal

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20231218

Claims (20)

1. 1 . A user equipment (UE) for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to: receive, in accordance with a handover from a source cell to a target cell, an indication of an initial power adjustment state to be used for an initial transmission to the target cell, wherein the initial power adjustment state corresponds to a sum of a most recent power adjustment state associated with transmissions to the source cell and a delta; and perform an initial transmission to the target cell in accordance with the initial power adjustment state.
2. 2 . The UE of claim 1 , wherein the source cell and the target cell are associated with a same satellite or a same high-altitude platform station.
3. 3 . The UE of claim 1 , wherein the indication of the initial power adjustment state is included in a handover command associated with the handover from the source cell to the target cell.
4. 4 . The UE of claim 3 , wherein the most recent power adjustment state corresponds to a most recent physical uplink shared channel (PUSCH) power adjustment state of a PUSCH loop index indicated in the handover command.
5. 5 . The UE of claim 3 , wherein the one or more processors are further configured to identify a loop index value of zero in accordance with a loop index not being indicated in the handover command.
6. 6 . The UE of claim 3 , wherein the one or more processors are further configured to identify that the target cell is associated with a same satellite or a same high-altitude platform station as the source cell in accordance with an ephemeris of the source cell and an ephemeris of the target cell or in accordance with an indication received from a network node.
7. 7 . The UE of claim 1 , wherein the initial transmission to the target cell is in accordance with a configured grant.
8. 8 . The UE of claim 1 , wherein the initial transmission to the target cell is in accordance with a dynamically scheduled grant.
9. 9 . The UE of claim 8 , wherein a power control parameter to be used for the initial transmission to the target cell corresponds to a power control parameter associated with transmissions to the source cell.
10. 10 . The UE of claim 1 , wherein the delta corresponds to a transmit power control parameter that is received via downlink control information that schedules the initial transmission to the target cell.
11. 11 . A network node for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to: transmit, in accordance with a handover by a user equipment (UE) from a source cell to a target cell, an indication of an initial power adjustment state to be used by the UE for an initial transmission to the target cell, wherein the initial power adjustment state corresponds to a sum of a most recent power adjustment state associated with transmissions to the source cell and a delta, and wherein the initial transmission by the UE to the target cell is in accordance with the initial power adjustment state.
12. 12 . The network node of claim 11 , wherein the source cell and the target cell are associated with a same satellite or a same high-altitude platform station.
13. 13 . The network node of claim 11 , wherein the indication of the initial power adjustment state is included in a handover command associated with the handover from the source cell to the target cell.
14. 14 . The network node of claim 13 , wherein the most recent power adjustment state corresponds to a most recent physical uplink shared channel (PUSCH) power adjustment state of a PUSCH loop index indicated in the handover command.
15. 15 . The network node of claim 13 , wherein a loop index value is equal to zero in accordance with a loop index not being indicated in the handover command.
16. 16 . The network node of claim 11 , wherein the initial transmission by the UE to the target cell is in accordance with a configured grant.
17. 17 . The network node of claim 11 , wherein the initial transmission by the UE to the target cell is in accordance with a dynamically scheduled grant.
18. 18 . A method of wireless communication performed by a user equipment (UE), comprising: receiving, in accordance with a handover from a source cell to a target cell, an indication of an initial power adjustment state to be used for an initial transmission to the target cell, wherein the initial power adjustment state corresponds to a sum of a most recent power adjustment state associated with transmissions to the source cell and a delta; and performing an initial transmission to the target cell in accordance with the initial power adjustment state.
19. 19 . The method of wireless communication of claim 18 , wherein the source cell and the target cell are associated with a same satellite or a same high-altitude platform station.
20. 20 . The method of wireless communication of claim 18 , wherein the indication of the initial power adjustment state is included in a handover command associated with the handover from the source cell to the target cell.

Description

CROSS-REFERENCE TO RELATED APPLICATION This Patent Application claims priority to U.S. Provisional Patent Application No. 63/503,077, filed on May 18, 2023, entitled “POWER ADJUSTMENT FOR UPLINK TRANSMISSIONS,” and assigned to the assignee hereof. The disclosure of the prior Application is considered part of and is incorporated by reference into this Patent Application. FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for power adjustment for uplink transmissions. 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 network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. “Downlink” (or “DL”) refers to a communication link from the network node to the UE, and “uplink” (or “UL”) refers to a communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via a local link (e.g., a sidelink (SL), a wireless local area network (WLAN) link, and/or a wireless personal area network (WPAN) link, among other examples). 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 receiving, in accordance with a handover from a source cell to a target cell, an indication of an initial power adjustment state to be used for an initial transmission to the target cell. The method may include performing an initial transmission to the target cell in accordance with the initial power adjustment state. Some aspects described herein relate to a method of wireless communication performed by a network node. The method may include transmitting, in accordance with a handover by a UE from a source cell to a target cell, an indication of an initial power adjustment state to be used by the UE for an initial transmission to the target cell. Some aspects described herein relate to a UE for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to receive, in accordance with a handover from a source cell to a target cell, an indication of an initial power adjustment state to be used for an initial transmission to the target cell. The one or more processors may be configured to perform an initial transmission to the target cell in accordance with the initial power adjustment state. Some aspects described herein relate to a network node for wireless communication. The network node may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to transmit, in accordance with a handover by a UE from a source cell