5G MCG Failure Reporting With Timer-Based RLF Data Handling
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Solution Overview
Problem
Current 5G Radio Access Network (RAN) architectures face challenges in efficiently reporting and addressing Radio Link Failures (RLFs) due to insufficient information exchange between user equipment (UE) and the network, leading to degraded performance and user experience.
Innovation Solution
A method for enhanced RLF reporting in 5G networks, where user equipment (UE) detects RLF, stores relevant information, and sends a message with MCG failure details, including a timer mechanism to manage the reporting process, allowing for improved network optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE sends RLF information to the network, then the network can optimize parameters and improve reliability, but the signaling overhead and complexity increase
Solution Approach 1:
The patent extracts only the essential RLF information elements that are most valuable for network optimization, rather than transmitting complete detailed logs. This selective extraction reduces signaling overhead while maintaining the ability to perform effective parameter tuning and failure analysis.
Solution Approach 2:
The UE prepares and buffers RLF information locally before transmission, organizing data in advance according to network requirements. This preliminary action allows the network to receive structured, ready-to-analyze information, reducing the processing burden and signaling complexity during actual failure events.
2Manufacturing precision
If the UE stores detailed RLF information, then the network can perform better optimization, but the UE memory requirements and processing load increase
Solution Approach 1:
The patent applies different levels of detail to different information elements based on their importance. Critical parameters for optimization are stored with high precision, while less important details are summarized or omitted. This local quality approach ensures optimization precision is maintained for key parameters without requiring storage of all possible details.
Solution Approach 2:
The UE stores a partial set of RLF information elements that are most valuable for network optimization, rather than complete detailed logs. This partial action provides sufficient data for effective parameter tuning while significantly reducing the volume of stored information and associated processing load.
3Measurement precision
If the network receives comprehensive failure reports, then it can identify RLF causes more accurately, but the message size and transmission time increase
Solution Approach 1:
The patent extracts and transmits only the most critical failure detection parameters that enable accurate RLF cause identification, such as key measurement results and failure indicators. This selective transmission maintains measurement precision for failure analysis while significantly reducing message size and transmission time.
Solution Approach 2:
The UE pre-processes and prioritizes failure information before transmission, identifying and highlighting the most relevant parameters that are essential for cause identification. This preliminary prioritization ensures the network receives compact, high-value information that enables rapid and accurate failure analysis without transmitting unnecessary data.
Data Source
AI summary
A method (400) for reporting radio link failure, RLF, information. The method includes a user equipment, UE, detecting (s402) an RLF with respect to a master cell group, MCG. The method also includes, in response to detecting the RLF with respect to the MCG, the UE storing (s404) RLF information. The method also includes the UE sending (s406) a first message comprising MCG failure information, e.g., the RLF information, and activating a timer. The method also includes the UE receiving (s408) a second message after sending the first message and activating the timer. The method also includes the UE, in response to receiving the second message, determining (s410) that a condition is satisfied, wherein determining that the condition is satisfied comprises at least determining that the timer is still running. The method also includes, as a result of determining that the condition is satisfied, the UE deleting (s412) the RLF information.