PSCell Failure Reporting for Reliable 5G Dual Connectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In dual-connectivity communication systems, particularly in 5G NR systems, there are issues with access failures and radio link failures (RLF) during primary secondary cell (PSCell) addition or change, which current network adjustments are unable to reliably address.
Innovation Solution
The terminal device reports an SCG failure report to the network side, including indication information about the type of PSCell addition/change, allowing the network to adjust triggering conditions and configurations to improve reliability and reduce failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network side adjusts triggering conditions for PSCell addition/change, then access reliability can be improved, but the system lacks accurate failure type information to make precise adjustments
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device sends an SCG failure report containing failure type indication information to the network side. This feedback loop enables the network to accurately identify whether the failure occurred during PSCell addition or change, allowing for precise adjustment of triggering conditions based on actual failure scenarios, thereby improving access reliability.
Solution Approach 2:
The patent segments the failure information by introducing distinct indication values to differentiate between PSCell addition failure and PSCell change failure. This segmentation allows the network side to analyze and adjust triggering conditions separately for each failure type, enabling more targeted and effective reliability improvements.
2Reliability
If the terminal device reports detailed failure information, then network adjustment reliability improves, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by adding failure type indication information specifically within the SCG failure report context, rather than creating a completely new signaling message. This approach provides the necessary detailed information for reliable network adjustment while minimizing additional signaling overhead by reusing existing report structures.
3Reliability
If the network side makes frequent adjustments to triggering conditions, then access failure rate decreases, but system stability may be compromised
Solution Approach 1:
The patent implements dynamic adjustment of triggering conditions based on real-time failure type feedback from terminal devices. The network side can adaptively modify conditions for PSCell addition or change based on the specific failure scenario observed, allowing the system to maintain stability while improving access success rates through targeted, evidence-based adjustments.
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
Methods for communication and related devices are provided in the disclosure. The method includes the following. A terminal device determines a failure of access to a target primary secondary cell (PSCell) or a radio link failure (RLF) after the target PSCell is accessed. The terminal device transmits a secondary cell group (SCG) failure report to a first network node, where the SCG failure report includes first indication information, and the first indication information indicates type information of PSCell addition/change. According to the implementations of the disclosure, it is conducive to improving a reliability of adjustment on information for triggering PSCell addition/change by a network side, thereby reducing occurrence of a failure of access to a PSCell.