Beam Failure Detection Reference Signal Selection via TCI States
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation mobile communication systems, the determination of a beam failure detection reference signal (BFD RS) is indefinite, leading to potential throughput reduction and communication quality degradation.
Innovation Solution
A terminal that receives configurations for control resource sets and reference signals for beam failure detection, utilizing transmission configuration indication states and medium access control elements to determine appropriate BFD RSs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If beam failure detection reference signal (BFD RS) determination is left indefinite, then system complexity is reduced, but communication quality degrades and throughput reduces
Solution Approach 1:
The terminal autonomously determines the BFD RS by itself using the association relationship between first reference signals and TCI states, without requiring external network configuration or intervention. This self-service mechanism resolves the contradiction by enabling reliable beam failure detection through terminal-side intelligence while keeping the network side simple.
Solution Approach 2:
The first reference signals serve multiple functions: they are used for both beam failure detection and are associated with TCI states for control resource sets. This multi-functionality allows the same signal to fulfill multiple roles, reducing system complexity while maintaining detection reliability.
2Loss of information
If beam failure detection reference signal (BFD RS) determination is left indefinite, then configuration overhead is reduced, but throughput reduces
Solution Approach 1:
The terminal independently determines BFD RS based on pre-configured associations between first reference signals and TCI states, eliminating the need for additional network configuration messages. This self-determination mechanism prevents throughput loss by ensuring reliable beam failure detection without increasing configuration overhead.
Solution Approach 2:
The association between first reference signals and TCI states is pre-configured before beam failure detection is needed. This preliminary action establishes the determination rules in advance, allowing the terminal to quickly and accurately identify BFD RS without requiring real-time configuration, thus maintaining high throughput.
3Reliability
If appropriate BFD RS determination is implemented, then communication quality is maintained, but device complexity increases
Solution Approach 1:
The terminal uses its own stored configuration information about the association between first reference signals and TCI states to determine BFD RS. This self-service approach maintains communication quality through accurate determination while avoiding the complexity of additional network coordination or complex algorithms.
Solution Approach 2:
The TCI states serve as an intermediary that links the control resource set configuration to the first reference signals. By using this intermediary relationship, the terminal can determine BFD RS through a clear and simple lookup process based on pre-established associations, maintaining low processing complexity.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives a first configuration for a control resource set (CORESET) having a plurality of transmission configuration indication (TCI) states, that receives a second configuration for one or more first reference signals for beam failure detection (BFD) or radio link monitoring (RLM), and that receives a medium access control-control element (MAC CE), and a control section that determines, based on the first configuration, the second configuration, and the MAC CE, one or more second reference signals used for the BFD or the RLM, wherein the one or more first reference signals are associated with the plurality of respective TCI states. According to one aspect of the present disclosure, it is possible to appropriately determine a BFD RS.