Mobility Feedback Using Beam-Aware Radio Link Failure Reports
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving handover procedures, particularly in managing radio link failures (RLF) and beam recovery failures, which can lead to service interruptions and inefficient handovers.
Innovation Solution
The method and apparatus involve identifying RLF events, reestablishing an RRC connection with a cell of a different radio access technology (RAT), and transmitting an RLF report that includes information about directional beams associated with the failure, allowing for improved handover management and reduced service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handover procedures are initiated to allow UE to establish a link with a target cell, then mobility is supported, but radio link failures and beam recovery failures occur leading to service interruptions
Solution Approach 1:
The patent implements feedback mechanisms where the UE reports RLF events and beam failure information back to the network. This feedback enables the network to adjust handover parameters and beam configurations based on actual failure patterns, improving both handover capability and service continuity through iterative optimization
Solution Approach 2:
The patent applies preliminary action by establishing multiple directional beams and preparing beam recovery strategies before failures occur. The network pre-configures alternative beams and handover targets, enabling faster recovery when RLF or beam failures happen, thus maintaining service continuity while supporting mobility
2Measurement precision
If detailed information about RLF events and directional beams is collected and reported, then handover decision-making is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the RLF reporting mechanism into distinct components: beam failure detection, RLF event identification, and structured report generation. This segmentation allows the system to collect detailed information systematically while managing device complexity through modular implementation and standardized reporting formats
Data Source
AI summary
Methods, systems, and devices for providing feedback about radio link failure (RLF) events that includes information about directional beams. A user equipment (UE) may experience an RLF event and lose connectivity with a network. After the UE reestablish a radio resource control (RRC) connection with the network, the UE may transmit an RLF report that include information about directional beams, information about a master node and a secondary node in a dual-connectivity procedure, information associated conditional handover procedures, or information about service time interruptions, or a combination thereof. One or more base stations may be configured to transmit at least portions of the information in the RLF report to other base stations as part of a message that may be an example of an RLF indication or a handover report. The message may be transmitted over an X2 interface or an Xn interface.