Aperiodic Beam Failure Detection Reference Signals for Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional beam failure detection techniques in wireless communication systems result in high signaling overhead and prolonged time for beam failure recovery due to periodic transmission of reference signals, which is inefficient, especially at high carrier frequencies.
Innovation Solution
Implementing aperiodic beam failure detection reference signals (BFD-RSs) that allow user equipment (UE) to detect beam failures quickly by configuring parameters such as trigger thresholds and receiving periodic BFD-RSs, enabling the transmission of aperiodic BFD-RSs based on satisfied thresholds, thereby reducing signaling overhead and accelerating beam recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic BFD-RS transmission is used, then beam failure detection can be performed regularly, but signaling overhead increases and recovery time is prolonged
Solution Approach 1:
The patent transitions from static periodic BFD-RS transmission to dynamic aperiodic transmission triggered by beam failure events. The system dynamically adjusts reference signal transmission based on actual beam conditions, transmitting BFD-RS only when beam failure is detected or suspected, thereby reducing unnecessary signaling overhead while maintaining reliable beam failure detection capability.
Solution Approach 2:
The patent changes the transmission parameter of BFD-RS from fixed periodic intervals to event-triggered aperiodic transmission. By changing the transmission timing parameter based on beam failure detection events, the system reduces signaling overhead while ensuring timely beam failure detection and recovery.
2Reliability
If periodic BFD-RS transmission is used, then beam failure detection is systematic, but recovery time is prolonged
Solution Approach 1:
The patent implements preliminary beam failure detection by monitoring beam conditions and triggering aperiodic BFD-RS transmission before complete beam failure occurs. By detecting beam degradation early and initiating recovery procedures proactively, the system reduces overall recovery time while maintaining reliable detection capability.
Solution Approach 2:
The system dynamically responds to beam conditions by activating aperiodic BFD-RS transmission only when needed, enabling faster reaction to beam failures compared to fixed periodic transmission. This dynamic approach reduces recovery time by eliminating waiting periods between periodic transmissions.
3Quantity of substance
If aperiodic BFD-RS transmission is implemented, then signaling overhead is reduced, but detection speed must be maintained
Solution Approach 1:
The patent implements feedback mechanisms where the system monitors beam conditions and uses this feedback to trigger aperiodic BFD-RS transmission. When beam failure indicators are detected, the system immediately transmits BFD-RS to confirm failure and initiate recovery, maintaining fast detection speed while reducing overhead by avoiding unnecessary transmissions during normal conditions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling including a set of parameters. The set of parameters may include one or more thresholds associated with initiating aperiodic beam failure detection (BFD) reference signals (RSs). The UE may receive a set of periodic BFD-RSs. In some examples, the UE or the base station may determine that a triggering threshold is satisfied. In some cases, the UE may determine that the set of periodic BFD-RSs satisfies a consecutive beam failure indication (BFI) threshold, a cumulative BFI threshold, or the like. In some cases, a base station may determine that the set of periodic BFD-RSs satisfies a channel quality threshold. The UE may receive a set of one or more aperiodic BFD-RSs based on whether the triggering threshold is satisfied.