IP Library › Granted Patent US 12,382,408
Granted Patent B2
US 12,382,408 · App. 18/671,540 · Granted Aug 5, 2025

Random access procedures based on physical downlink control channel (PDDCH) orders

Inventors: Yongjun Kwak (Portland, OR); Daewon Lee (Portland, OR); Gregory Morozov (Nizhny Novgorod, RU); Seunghee Han (San Jose, CA)
Assignee: Apple Inc.
H04W56/001H04L5/0048H04W52/36H04W72/23H04W74/0833
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Quick Facts
Patent No.
US 12,382,408
App. No.
18/671,540
Granted
Aug 5, 2025
Kind
B2
Abstract

Methods, systems, and storage media are described for random access procedures triggered based on physical downlink control channel (PDDCH) orders. Other embodiments may be described and/or claimed.

Claims (32)

1. An apparatus comprising:

a memory that stores configuration information that a user equipment (UE) is to use to perform a periodic channel state information-reference signal (CSI-RS) reception, wherein the configuration information comprises a block power parameter and a power control offset parameter; and

a processor, coupled with the memory, configured to:

retrieve the configuration information from the memory;

generate a message that includes the configuration information; and

encode the message for transmission to the UE,

wherein the configuration information enables the UE to determine a reference signal power (referenceSignalPower) of a physical random access channel (PRACH) transmission based on the block power parameter or based on the block power parameter and the power control offset parameter depending on a configuration of the CSI-RS or downlink control information (DCI).

2. The apparatus of claim 1 , wherein the power control offset parameter provides an offset of transmission power of a tracking reference signal (TRS) relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power.

3. The apparatus of claim 2 , wherein the TRS is a CSI-RS in a non-zero power (NZP) CSI-RS resource set configured with a TRS-Info parameter.

4. The apparatus of claim 1 , wherein the power control offset parameter provides an offset of a beam management reference signal (BMRS) relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power.

5. The apparatus of claim 4 , wherein the BMRS is a CSI-RS in a non-zero power (NZP) CSI-RS resource set configured with a higher layer parameter repetition.

6. The apparatus of claim 1 , wherein the CSI-RS is quasi co-located (QCL-ed) with a synchronization signal block (SSB), and wherein the block power parameter is to indicate the referenceSignalPower.

7. The apparatus of claim 1 , wherein the CSI-RS is not quasi co-located (QCL-ed) with a synchronization signal block (SSB), and wherein the power control offset parameter is to provide an offset of CSI-RS transmission power relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power indicated by the block power parameter.

8. A method comprising:

receiving, by a user equipment (UE), a configuration message that comprises a block power parameter and a power control offset parameter;

determining, based on the configuration message, a power level for a physical random access channel (PRACH) transmission based on the block power parameter or based on the block power parameter and the power control offset parameter depending on a configuration of a channel state information-reference signal (CSI-RS) or downlink control information (DCI); and

performing the PRACH transmission based on the determined power level.

9. The method of claim 8 , wherein the UE is configured for periodic CSI-RS reception.

10. The method of claim 8 , wherein the power control offset parameter provides an offset of transmission power of a tracking reference signal (TRS) relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power when the CSI-RS for tracking is configured for quasi co-location (QCL) info 1.

11. The method of claim 10 , wherein the TRS is a CSI-RS in a non-zero power (NZP) CSI-RS resource set configured with a TRS-Info parameter.

12. The method of claim 8 , wherein the power control offset parameter provides an offset of a beam management reference signal (BMRS) relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power when the CSI-RS for tracking is configured for quasi co-location (QCL) info 2.

13. The method of claim 12 , wherein the BMRS is a CSI-RS in a non-zero power (NZP) CSI-RS resource set configured with a higher layer parameter repetition.

14. The method of claim 8 , wherein the CSI-RS is quasi co-located (QCL-ed) with a synchronization signal block (SSB), and wherein the block power parameter is to indicate a reference signal power (referenceSignalPower).

15. The method of claim 8 , wherein the CSI-RS is not quasi co-located (QCL-ed) with a synchronization signal block (SSB), and wherein the power control offset parameter is to provide an offset of CSI-RS transmission power relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power indicated by the block power parameter.

16. A method, comprising:

generating, by a base station, a configuration message comprising configuration information including: a block power parameter and a power control offset parameter; and

encoding the configuration message for transmission to a user equipment (UE),

wherein the configuration information enables the UE to determine a reference signal power (referenceSignalPower) of a physical random access channel (PRACH) transmission based on the block power parameter or based on the block power parameter and the power control offset parameter depending on a configuration of a channel state information-reference signal (CSI-RS) or downlink control information (DCI).

17. The method of claim 16 , wherein the power control offset parameter provides an offset of transmission power of a tracking reference signal (TRS) relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power, and wherein the TRS is a CSI-RS in a non-zero power (NZP) CSI-RS resource set configured with a TRS-Info parameter.

18. The method of claim 16 , wherein the power control offset parameter provides an offset of a beam management reference signal (BMRS) relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power, and wherein the BMRS is a CSI-RS in a non-zero power (NZP) CSI-RS resource set configured with a higher layer parameter repetition.

19. The method of claim 16 , wherein the CSI-RS is quasi co-located (QCL-ed) with a synchronization signal block (SSB), and wherein the block power parameter is to indicate the referenceSignalPower.

20. The method of claim 16 , wherein the CSI-RS is not quasi co-located (QCL-ed) with a synchronization signal block (SSB), and wherein the power control offset parameter is to provide an offset of CSI-RS transmission power relative to a synchronization signal/physical broadcast channel (SS/PBCH) block transmission power indicated by the block power parameter.

Continuity (3)
Continuation 17267085
Provisional Application 62717547 · Aug 10, 2018
Related Publication 20240314709A1 · Sep 19, 2024
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