Terminal MAC CE Processing for Multi-Point TCI State Management
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Solution Overview
Problem
Current radio communication systems, particularly in next-generation mobile communication systems like 5G, face challenges in controlling radio communication for moving objects at high speeds, such as trains, due to the complexity of managing beams transmitted from multiple transmission points.
Innovation Solution
A terminal equipped with a receiving section capable of processing MAC control elements (MAC CE) to specify multiple transmission configuration indication (TCI) states for a single control resource set, allowing for controlled reception of downlink control information from multiple transmission points using the same control resource set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beams are transmitted from multiple transmission points to support high-speed moving objects, then communication coverage and reliability are improved, but the complexity of controlling and managing radio communication increases
Solution Approach 1:
The patent combines multiple TCI states into a single control resource set, allowing the terminal to manage beams from multiple transmission points through unified control. This merging approach maintains communication reliability across multiple transmission points while reducing the complexity of controlling and managing each beam independently.
Solution Approach 2:
The control resource set is designed to serve multiple functions by supporting multiple TCI states simultaneously. This universal design allows a single control resource set to manage communications with multiple transmission points, reducing the need for separate control mechanisms for each beam.
2Measurement precision
If multiple TCI states are managed separately for each transmission point, then beam control precision is improved, but the terminal processing burden and system complexity increase
Solution Approach 1:
The patent merges multiple TCI state management tasks into a single control resource set framework. This allows the terminal to maintain precise beam control for multiple transmission points while processing all TCI states through a unified mechanism, thereby reducing terminal processing complexity.
Solution Approach 2:
The patent segments TCI states into a structured format within the control resource set, allowing the terminal to process and manage multiple states systematically. This segmentation approach maintains control precision while organizing the processing workload in a manageable manner.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives a MAC control element (MAC CE) capable of specifying a plurality of transmission configuration indication (TCI) states for one control resource set, and a control section that controls reception of downlink control information transmitted from each of a plurality of transmission points by using a same control resource set, based on the MAC CE.