Beam Sweep Power Control for Uplink Beam Alignment
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Solution Overview
Problem
Current wireless communication systems face challenges in power control for uplink beam sweep, particularly in 5G new radio (NR) systems, where high data rates and lower latency require accurate beam alignment to compensate for propagation losses, but existing methods are inadequate for robust communication on both uplink and downlink.
Innovation Solution
The implementation of a method to determine and transmit a beam sweep pattern with specific transmit power levels for user equipment (UE) on physical uplink shared channel (PUSCH) or physical uplink control channel (PUCCH), allowing for dynamic power control and beam alignment, which includes indicating the beam sweep pattern to the UE and enabling it to perform beam sweep based on received indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam sweep is performed with fixed power levels, then implementation is simple, but communication robustness deteriorates due to propagation losses at high frequencies
Solution Approach 1:
The patent implements dynamic power control for beam sweep transmissions by allowing the network entity to determine and signal different transmit power levels for different beams in the beam sweep pattern. The UE applies these indicated power levels when transmitting on PUSCH or PUCCH, enabling adaptive power adjustment based on channel conditions and beam characteristics, thereby improving communication robustness without requiring complex UE-side power determination logic.
2Reliability
If dynamic power control is implemented for each beam, then communication reliability improves, but system complexity increases
Solution Approach 1:
The network entity determines the beam sweep pattern including transmit power levels for each beam in advance and signals this information to the UE before the UE performs beam sweep transmissions. This preliminary determination and signaling of power control parameters simplifies the UE's task to merely applying the indicated power levels, while achieving reliable beam alignment through dynamic power control.
Solution Approach 2:
The network entity acts as an intermediary that determines and signals the beam sweep pattern and power control parameters to the UE. This intermediary role centralizes the complex power control decision-making at the network side, which has better channel state information, while keeping the UE implementation simple through straightforward application of signaled parameters.
3Reliability
If power control parameters are signaled for each beam, then transmission reliability improves, but signaling overhead increases
Solution Approach 1:
The patent combines the beam sweep pattern indication and power control parameters into a single signaling message from the network entity to the UE. By merging these related control elements together, the patent reduces the number of separate signaling operations and minimizes overhead while ensuring that the UE receives all necessary information for reliable beam sweep transmissions on PUSCH and PUCCH.
Data Source
AI summary
Aspects described herein relate to power control for uplink beam sweep. In one aspect, a network entity may determine a beam sweep pattern including one or more beams for a user equipment (UE), the beam sweep pattern associated with transmission on at least one of a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH). The network entity may also transmit an indication including the one or more beams for the beam sweep pattern to the UE. In another aspect, a UE may receive an indication including a beam sweep pattern including one or more beams for transmission on at least one of a PUSCH or a PUCCH. The UE may perform beam sweep using one or more beams on at least one of the PUSCH or the PUCCH based on the beam sweep pattern.