Uplink Spatial Filter Switching and Power Control for Beam Management
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam management and transmission power control in heterogeneous networks, leading to suboptimal performance and resource utilization.
Innovation Solution
Implementing a mechanism for dynamic adjustment of transmission power and beam management based on specific criteria, such as traffic load and device capabilities, using modular configurations and flexible protocol stacks to optimize communication in heterogeneous environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dynamic adjustment of transmission power and beam management is implemented, then communication efficiency and signal quality are improved, but device complexity and protocol stack flexibility requirements increase
Solution Approach 1:
The protocol stack is divided into functional modules including spatial filter determination unit, transmission power determination unit, and beam management unit. Each module operates independently and can be configured separately, allowing dynamic adjustment of transmission parameters without requiring complete system redesign. This modular segmentation enables flexible adaptation to different network conditions while managing complexity through functional decomposition.
Solution Approach 2:
The system implements dynamic adjustment mechanisms where transmission power and beam directions are continuously adapted based on real-time channel conditions, traffic load, and device capabilities. The spatial filter determination unit dynamically selects beam directions, and the transmission power determination unit adjusts power levels based on path loss measurements and quality of service requirements, enabling the system to respond flexibly to changing conditions without fixed configuration.
2Reliability
If beam management and transmission power control are optimized, then signal quality and interference reduction are improved, but measurement and detection difficulty increase
Solution Approach 1:
The system employs feedback mechanisms where the wireless device measures downlink channel conditions and reports back to the network node. Based on this feedback, the spatial filter determination unit and transmission power determination unit adjust beam directions and power levels. The feedback loop includes quality of service measurements and path loss information, enabling continuous optimization of signal quality through measured data while simplifying the measurement process through standardized feedback protocols.
Solution Approach 2:
The wireless device performs self-measurement of channel conditions and autonomously determines appropriate spatial filters and transmission power levels based on pre-configured parameters and measured path loss. The device uses reference signals and synchronization signals to self-evaluate channel quality without requiring extensive external measurement assistance, reducing the complexity of detection and measurement while maintaining optimized signal quality.
3Productivity
If adaptive transmission power and beam selection are implemented, then resource utilization is improved, but energy consumption for measurements and adjustments increases
Solution Approach 1:
The system performs beam management and power adjustment operations periodically rather than continuously. The spatial filter determination unit and transmission power determination unit update their configurations based on periodic channel condition measurements and traffic load assessments. This periodic operation mode enables the system to adapt to changing conditions and optimize resource utilization while significantly reducing energy consumption compared to continuous adjustment, as measurements and calculations are performed only when necessary.
Solution Approach 2:
The system optimizes resource utilization by dynamically changing transmission parameters such as beam directions, power levels, and spatial filters based on measured path loss and quality of service requirements. The transmission power determination unit adjusts power parameters in discrete steps based on predefined tables or formulas, avoiding unnecessary fine-grained adjustments. This parameter change approach enables efficient resource allocation matched to actual channel conditions while minimizing the energy required for measurements and control signaling.
Data Source
AI summary
A wireless device transmits, for a random access procedure, a physical uplink shared channel (PUSCH) transmission based on a first spatial filter. The wireless device receives a medium access control control element (MAC CE) indicating activation of more than one TCI state of a plurality of TCI states. The wireless device transmits one or more first uplink signals before applying a TCI state, from the more than one TCI state, indicated by a downlink control information (DCI), using the first spatial filter used and a first transmission power determined based on a synchronization signal block (SSB). The wireless device transmits, after applying the TCI state, one or more second uplink signals using: a second spatial filter determined based on a reference signal indicated by the TCI state and a second transmission power determined based on power control parameters associated with the TCI state.