Unified PSCell Candidate Configuration for Seamless CPC Switching

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Solution Overview

Problem

Current communication technologies separately configure candidate cells for intra-secondary node and inter-secondary node conditional primary secondary cell changes, limiting the flexibility and efficiency of subsequent conditional primary secondary cell addition or change processes.

Innovation Solution

A unified configuration method and apparatus that enables user equipment to perform both intra-SN and inter-SN CPC processes using a single set of candidate cells, allowing for efficient switching between source and target PSCells without requiring network reconfiguration in between.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If candidate cells are configured separately for intra-SN and inter-SN CPC processes, then the configuration process is simple and clear, but the flexibility and efficiency of subsequent CPAC process is limited

Engineering Contradiction:
Improveflexibility of CPAC processVSAvoidconfiguration complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the configuration of candidate cells for intra-SN and inter-SN CPC processes into a single unified configuration. The network side device configures a single set of candidate cells that can be used for both intra-SN and inter-SN CPAC processes, eliminating the need for separate configuration sets. This reduces configuration complexity while enhancing flexibility and adaptability.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The unified candidate cell configuration serves multiple functions: it can be used for both intra-SN and inter-SN CPAC processes. The same candidate cells configured in a single step can support different types of PSCell changes depending on the execution conditions, making the configuration system universal and multi-functional.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If separate candidate cell configurations are used for intra-SN and inter-SN CPC, then configuration clarity is maintained, but data packet loss increases due to redundant reconfiguration

Engineering Contradiction:
Improvedata transmission reliabilityVSAvoiddata packet loss
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The network side device performs preliminary configuration of candidate cells in a single step, preparing both intra-SN and inter-SN candidate cells ahead of time. This preliminary action eliminates the need for redundant reconfiguration operations during actual PSCell changes, as the required candidate cells are already configured and ready to use.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The unified configuration enables continuous and seamless PSCell changes without interruption. By maintaining a single active configuration that supports both intra-SN and inter-SN processes, the system avoids the discontinuities and packet loss that would occur during redundant reconfiguration operations.

Inventive Principle:
Principle #20Continuity of useful action

3Productivity

If two groups of candidate cells are configured for CPAC process, then the CPAC process can support both intra-SN and inter-SN changes, but the configuration efficiency and speed are reduced

Engineering Contradiction:
Improveconfiguration efficiencyVSAvoidconfiguration time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent combines the configuration of two separate candidate cell groups into a single unified configuration step. The network side device configures one set of candidate cells that serves both intra-SN and inter-SN CPAC processes, reducing the time and resources required for configuration while maintaining full functionality.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The system performs preliminary configuration of the unified candidate cell set in advance, preparing all necessary configurations before actual PSCell changes are needed. This preliminary action eliminates the need for time-consuming reconfiguration operations during execution, significantly improving configuration efficiency.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS20260032549A1Conditional primary secondary cell addition or change (CPAC) configuration method and apparatus, and related product
Publication Date: 2026.01.29 VIVO MOBILE COMM CO LTD
  • US20260032549A1 patent drawing
  • US20260032549A1 patent drawing
  • US20260032549A1 patent drawing

AI summary

This application discloses a CPAC configuration method and apparatus, and a related product, and relates to the field of communications technologies. The CPAC configuration method in embodiments of this application includes: UE receives target configuration information sent by a network side device, where the target configuration information is used to configure at least one first candidate cell for subsequent CPAC, and the at least one first candidate cell is available for an intra-SN CPC process and an inter-SN CPC process; and the UE performs a first operation to change from a source primary secondary cell PSCell to a target PSCell, where the first operation includes at least one of the following: the intra-SN CPC process and the inter-SN CPC process, and the target PSCell is the first candidate cell of the at least one first candidate cell.