UL-TCI Power Control for Codebook-Based PUSCH Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring uplink transmission power control parameters, particularly in scenarios involving codebook-based physical uplink shared channel transmissions, due to the lack of effective methods for determining appropriate power control parameters and spatial domain transmission filters.
Innovation Solution
The method involves receiving a radio resource control message configuring a set of uplink transmission configuration indication power control parameter groups, determining power control parameters based on spatial domain transmission filters, and transmitting codebook-based physical uplink shared channel transmissions with power determined by these parameters, while network units can transmit such messages to user equipment to facilitate this configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional power control methods are used for uplink transmissions, then the system is simple to implement, but the communication quality and reliability deteriorate due to inability to efficiently configure power control parameters for codebook-based physical uplink shared channel transmissions
Solution Approach 1:
The patent segments the power control parameters into distinct groups (first set and second set of power control parameters) corresponding to different transmission types (non-codebook-based and codebook-based PUSCH transmissions). This segmentation allows each parameter set to be optimized for its specific transmission type, improving communication quality for codebook-based transmissions while maintaining simplicity for other transmissions.
Solution Approach 2:
The patent introduces dynamic selection of power control parameter sets based on the transmission type. The network device dynamically indicates which parameter set to use through downlink control information, allowing the system to adapt to different transmission scenarios (codebook-based vs. non-codebook-based) and thereby improve communication quality without permanently increasing system complexity.
2Reliability
If power control parameters are not specifically configured for codebook-based transmissions, then the configuration process remains simple, but the transmission power cannot be optimized leading to reduced communication reliability
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple sets of power control parameters (first set and second set) before actual transmissions occur. The network device prepares these parameter sets in advance and stores them in the user equipment, so that when codebook-based transmissions are needed, the appropriate parameters are already available, eliminating the need for complex real-time determination and improving both reliability and ease of operation.
Solution Approach 2:
The patent introduces an intermediary mechanism (downlink control information) that mediates between the network device's power control intentions and the user equipment's transmission execution. The downlink control information carries indications of which pre-configured parameter set to use, simplifying the user equipment's task to merely selecting from pre-prepared options rather than determining parameters from scratch, thereby improving ease of operation while ensuring transmission reliability.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for configuring UL-TCI power control parameters. One method (400) includes receiving (402) an RRC message configuring a set of UL-TCI power control parameter groups. Each UL-TCI power control parameter group defines a group of power control parameters used to calculate an uplink transmission power. The method (400) includes receiving (404) DCI scheduling a codebook-based PUSCH transmission. The DCI comprises an UL-TCI field indicating at least one spatial domain transmission filter for the codebook-based PUSCH transmission. The method (400) includes determining (406) power control parameters for the codebook-based PUSCH transmission based on an UL-TCI power control parameter group of the set of UL-TCI power control parameter groups that corresponds to the UL-TCI field. The method (400) includes transmitting (408) the codebook-based PUSCH with a transmission power determined based on the power control parameters.