Secondary Cell Failure Handling in 5G Duplicate Bearer Systems

The patent segments the failure handling process into distinct parts: detecting secondary cell failure, determining whether the radio bearer uses Duplicate bearer, and executing different handling procedures based on the bearer type. This segmentation simplifies the overall complexity by breaking down the complex failure handling into manageable, conditional steps.

The patent performs preliminary determination of the bearer type before executing the failure handling procedure. By checking whether the radio bearer uses Duplicate bearer with PDCP duplication in advance, the system can prepare and execute the appropriate handling strategy, reducing the complexity of real-time decision-making during failure events.

The patent implements a feedback mechanism where the terminal-side device detects secondary cell failure, reports it to the network-side device, and receives reconfiguration instructions. This feedback loop ensures that transmission continues only on properly configured cells, preventing resource wastage while maintaining continuity through coordinated reconfiguration.

The patent enables dynamic reconfiguration of the radio bearer based on the failure status of secondary cells. The system can adaptively switch between different bearer configurations (Duplicate bearer, Split bearer, or non-duplicated bearer) depending on the current network conditions and failure states, optimizing resource usage while maintaining transmission continuity.

The patent applies different handling strategies based on the local characteristics of the radio bearer configuration. For Duplicate bearer configurations, the system performs localized reconfiguration without full RRC connection re-establishment, while for other configurations, standard re-establishment procedures are used. This localized approach maintains connection reliability while minimizing unnecessary delays.

The patent changes the handling parameters based on the bearer type configuration. By identifying whether the radio bearer uses Duplicate bearer with PDCP duplication, the system adjusts the failure handling parameters (such as whether to trigger RRC connection re-establishment), thereby optimizing the balance between connection reliability and transmission delay for each specific configuration.