Dynamic Beam Failure Detection Resource Updates for Multi-TRP Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam failure detection and recovery in a multi-TRP environment, particularly in supporting enhanced services like XR, where timely data transfer is critical for maintaining quality of service and user experience.
Innovation Solution
A method and apparatus for dynamically configuring and updating beam failure detection resources using Radio Resource Control (RRC) and Medium Access Control (MAC) Control Elements (CE) to adaptively manage beam failure detection across multiple Transmission Reception Points (TRPs) based on channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If beam failure detection resources are statically configured for multiple TRPs, then system complexity is reduced, but adaptability to changing channel conditions deteriorates
Solution Approach 1:
The patent implements dynamic beam failure detection resource configuration where the network can update BFD resources for multiple TRPs through MAC CE signaling. The UE receives RRC configuration for multiple BFD RS sets and can dynamically switch between them based on network indications, allowing the system to adapt to changing channel conditions while maintaining manageable complexity through standardized procedures.
Solution Approach 2:
The patent changes the parameter configuration approach by introducing multiple BFD RS sets with different parameters (reference signal resources, monitoring occasions) that can be selectively activated. The network can modify which BFD RS set is active without full reconfiguration, enabling parameter adaptation to channel conditions while reducing signaling overhead compared to complete reconfiguration.
2Reliability
If multiple BFD RS sets are configured for multiple TRPs, then beam failure detection reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the BFD resources into multiple separate BFD RS sets, each associated with specific TRPs. This segmentation allows the network to configure and manage BFD resources for multiple TRPs independently, improving detection reliability by having dedicated resources per TRP while controlling signaling overhead through selective activation and update of individual sets.
Solution Approach 2:
The patent implements dynamic activation and deactivation of BFD RS sets through MAC CE signaling. Instead of continuously signaling all BFD resource configurations, the network dynamically updates only the active set or switches between pre-configured sets, maintaining high reliability through multiple available sets while reducing instantaneous signaling overhead.
3Productivity
If dynamic updating of BFD resources is implemented, then service efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple BFD RS sets through RRC signaling before dynamic switching is needed. The UE receives and stores multiple BFD resource configurations in advance, so when dynamic updates are required via MAC CE, the UE can quickly switch to pre-prepared configurations without complex real-time processing, improving service efficiency while managing complexity through advance preparation.
Solution Approach 2:
The patent introduces MAC CE signaling as an intermediary mechanism between full RRC reconfiguration and immediate beam failure detection. The MAC CE provides a simplified update mechanism that activates or switches between pre-configured BFD RS sets, reducing the complexity of dynamic resource management compared to full RRC reconfiguration while enabling faster updates than static configuration for improving service efficiency.
Data Source
AI summary
A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving, from a base station (BS) via a radio resource control (RRC) message, configuration information including information on a first beam failure detection (BFD)-reference signal (RS) set and information on a second BFD-RS set, wherein each of the first BFD-RS set and the second BFD-RS set includes a plurality of BFD-RS resources, receiving, from the BS, medium access control (MAC) control element (CE) including information for indicating a first at least one BFD-RS resource included in the first BFD-RS set and a second at least one BFD-RS resource included in the second BFD-RS set, and identifying one or more activated BFD-RSs based on the MAC CE.