Dynamic Beam Switching Using Layered TCI Indication
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam indication and switching, particularly in 5G/NR systems, due to limitations in dynamic beam management and the need for improved beamforming techniques to support diverse services and applications.
Innovation Solution
The implementation of dynamic beam indication and switching mechanisms in user equipment (UE) and base stations (BS) through the use of DCI fields and RRC signaling to identify and manage TCI states, allowing for flexible and efficient beam management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic beam indication and switching mechanisms are implemented using DCI fields and RRC signaling, then beamforming capabilities and communication efficiency are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The beam indication mechanism is segmented into multiple components: RRC signaling for configuring TCI states and DCI fields for dynamic beam indication. This segmentation allows complex beam management to be divided into configuration phase (RRC) and execution phase (DCI), improving communication efficiency while managing device complexity through modular design
Solution Approach 2:
The DCI fields are designed to serve multiple functions: indicating TCI states for beamforming, supporting diverse services and applications, and enabling flexible beam management. This multi-functionality improves communication efficiency across different service types without requiring separate mechanisms for each application
2Adaptability or versatility
If multiple TCI states are indicated using additional DCI fields, then beam management flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent introduces a new dimension for beam indication by utilizing available DCI field structures and RRC signaling layers. Instead of adding purely horizontal expansion (more bits in single layer), the solution uses vertical dimension (multiple signaling layers: RRC and DCI) to convey TCI state information, achieving flexible beam management while managing signaling overhead through layered approach
Data Source
AI summary
Methods and apparatuses for dynamic beam indication and switching in a wireless communication system. A method performed by a user equipment (UE) includes receiving, in downlink control information (DCI), at least a first DCI field to indicate a first transmission configuration indication (TCI) codepoint and receiving radio resource control (RRC) signaling including a first parameter indicating whether a second DCI field indicating a second TCI codepoint is present in the DCI. The method further includes identifying, based on the first parameter, a presence or absence of the second DCI field in the DCI and identifying, based on the first and second DCI fields, a set of a first TCI state and a second TCI state. The first DCI field is a TCI field, and the second DCI field uses one or more bits of one or more existing DCI fields in the DCI.