Uplink Beam State Updates for Shared TCI in 5G NR
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Solution Overview
Problem
The challenge in 5G NR wireless communication systems is the need for a flexible and efficient beam update mechanism to accommodate changes in beam pairs due to high frequency signal decay, particularly for uplink transmissions, where the impact of shared beam states on configured grant (CG) PUSCH transmissions is unclear.
Innovation Solution
A system and method for beam state updating in uplink transmissions using unified transmission configuration indicator (TCI) architecture, allowing shared beam states for both uplink and downlink, with specific parameters like reference SRS, PL-RS, TPMI, and number of layers being determined based on beam state information, and conditions for maintaining or updating these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam state information is updated frequently to accommodate high frequency signal decay, then coverage and reliability are improved, but system complexity and processing overhead increase
Solution Approach 1:
The patent segments beam state management into distinct components: beam state information storage, parameter determination logic, and transmission configuration. This segmentation allows the system to manage beam states systematically without overwhelming complexity, as each component has a specific function in the overall beam management process.
Solution Approach 2:
The patent applies preliminary action by pre-configuring beam state information and parameters before actual transmissions occur. The system determines parameters like reference SRS, PL-RS, and spatial relations in advance based on beam state information, so that when transmissions need to occur, the necessary configurations are already in place, reducing real-time processing complexity.
2Area of stationary object
If beam updates are performed rapidly to maintain connection in high frequency bands, then signal coverage is improved, but processing time and time delay increase
Solution Approach 1:
The system performs preliminary determination of transmission parameters based on beam state information before actual transmissions occur. By pre-establishing the mapping between beam states and parameters like reference SRS and spatial relations, the system reduces processing time during actual beam updates, allowing rapid adaptation to changing signal conditions.
Solution Approach 2:
The patent uses copying by referencing existing beam state information and parameters when performing updates. Instead of reconfiguring everything from scratch, the system copies and adapts existing parameter configurations based on the current beam state, significantly reducing the processing time required for beam updates while maintaining comprehensive coverage.
3Productivity
If shared beam states are applied to both uplink and downlink transmissions, then system efficiency is improved, but parameter determination complexity increases
Solution Approach 1:
The patent implements universality by creating a unified beam state management framework that serves both uplink and downlink transmissions. The same beam state information and determination methods are applied across different transmission types, allowing the system to handle multiple functions with a single set of principles, thereby improving efficiency without proportionally increasing complexity.
Solution Approach 2:
The system manages parameter complexity by dynamically adjusting parameter determination based on the specific transmission type and beam state conditions. When shared beam states are applied, the system changes which parameters need to be determined and which can be inherited from previous configurations, allowing efficient multi-functionality while controlling complexity through adaptive parameter management.
Data Source
AI summary
System, methods and apparatuses for updating beam state for uplink transmission can include a wireless communication node transmitting, and a wireless communication device receiving, a command signaling that indicates beam state information for a plurality of target transmissions. The wireless communication device can determine, according to the beam state information, parameters of the plurality of target transmissions.