5G NR PSCell Failure Reporting for Dual-Connectivity Reliability
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Solution Overview
Problem
In dual-connectivity (DC) communication systems, particularly in 5G NR systems, access failures or radio link failures (RLF) occur when a terminal device accesses a primary secondary cell (PSCell), and the network side lacks effective mechanisms to adjust and reduce these failures.
Innovation Solution
A terminal device reports a secondary cell group (SCG) failure report to the network, including indication information on the type of PSCell addition/change, enabling the network to modify triggering conditions and improve access reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PSCell addition/change is performed in DC communication system to increase throughput, then data throughput is improved, but access failures and RLF occur more frequently
Solution Approach 1:
The terminal device feeds back failure information to the network device when access failure or RLF occurs. The feedback includes indication information about the type of PSCell addition/change that failed. Based on this feedback, the network device adjusts the triggering conditions for future PSCell addition/change operations, thereby improving access reliability while maintaining throughput benefits.
2Reliability
If network adjusts PSCell addition/change triggers based on failure reports, then access reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential failure information needed for network adjustment - specifically the indication information about PSCell addition/change type - and excludes unnecessary detailed failure analysis. This selective information extraction reduces signaling overhead while still enabling effective network-side adjustments to improve access reliability.
Data Source
AI summary
A method 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.