Terminal Device TCI State Application for Beam Failure Detection
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Solution Overview
Problem
Current communication systems face challenges in efficient beam management for multi-beam operations, particularly in frequency range 2 (FR2), leading to higher latency and overhead, and inadequate beam failure detection mechanisms.
Innovation Solution
The method involves receiving and applying transmission configuration indicators (TCI) in downlink control information to reference signals for beam failure detection, enabling proper estimation of radio link quality and efficient beam management across both downlink and uplink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-beam operation is supported for frequency range 2, then beam management efficiency is improved, but latency and overhead increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple TCI states and reference signals before actual communication begins. The terminal device is configured with a first set of TCI states and corresponding reference signals in advance, allowing rapid beam switching without reconfiguration delays during operation.
Solution Approach 2:
The patent segments the beam management process into distinct components: separate TCI states for different beams, dedicated reference signals for beam failure detection, and independent control of downlink and uplink beam indications. This segmentation allows parallel processing and reduces overall latency.
2Reliability
If beam failure detection mechanism is enhanced, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent makes the reference signals serve multiple functions: they are used both for beam failure detection and for determining beam quality metrics. The same TCI states serve both for downlink beam indication and for configuring the reference signals used in failure detection, reducing the need for separate dedicated structures.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal device monitors beam quality based on reference signals and reports beam failure conditions to the network device. This feedback loop enables dynamic adjustment of beam configurations while maintaining system manageability through standardized protocols.
3Measurement precision
If TCI states are applied to reference signals for beam failure detection, then measurement precision is improved, but overhead increases
Solution Approach 1:
The patent merges the beam failure detection function with the existing TCI state framework by applying TCI states to reference signals that are already being transmitted for downlink communication. This combines multiple functions (beam indication and failure detection) into a single integrated mechanism, avoiding redundant signaling.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A terminal device receives an indication of at least one transmission configuration indicator (TCI) state in a detected downlink control information (DCI) in a first physical downlink control channel (PDCCH). The terminal device also receives a downlink transmission from the network device based on the at least one TCI state based on a first condition. The terminal device further applies the at least one TCI state to at least one reference signal (RS) in a first RS set based on the first condition, wherein the first RS set is applied for beam failure detection. Moreover, the terminal device determines an estimation of a radio link quality between the terminal device and the network device based on the first RS set. In this way, proper beam failure detection can be processed.