Master Node CPC Configuration for Dual Connectivity
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Solution Overview
Problem
Current MN-initiated Conditional Primary Secondary Cell (CPC) procedures in wireless communication systems face challenges in configuring A3 or A5 event conditions, where the MN cannot properly compare PSCell RSRP of a S-SN against target PSCells, requiring changes in UE implementation and not addressing issues in MN-initiated CPC scenarios.
Innovation Solution
The proposed solution involves the Master Node (MN) generating CPC execution conditions using A3 or A5 Event conditions, configuring the UE to evaluate these conditions considering the Special Cell (SpCell) as a PSCell, and embedding measurement configurations and execution conditions in reconfiguration messages to enable seamless cell changes without requiring changes in UE implementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the MN generates CPC execution conditions using A3 or A5 Event conditions, then the UE can evaluate conditions correctly without requiring changes in UE implementation, but the MN cannot properly compare PSCell RSRP of S-SN against target PSCells
Solution Approach 1:
The patent introduces a special cell (SpCell) as an intermediary reference cell that the UE compares target PSCell RSRP against. Instead of directly comparing S-SN PSCell RSRP (which requires UE implementation changes), the SpCell serves as a mediator that provides the reference value for A3/A5 event condition evaluation, enabling correct condition assessment without modifying UE behavior
Solution Approach 2:
The patent changes the parameter used for RSRP comparison from direct S-SN PSCell RSRP to SpCell RSRP. By modifying which cell's RSRP is used as the reference parameter in the A3/A5 event conditions, the system achieves correct condition evaluation while maintaining existing UE implementation
2Productivity
If the MN embeds measurement configurations and execution conditions in reconfiguration messages, then seamless cell changes are enabled, but the message structure becomes more complex
Solution Approach 1:
The patent performs preliminary action by embedding measurement configurations and execution conditions into the reconfiguration message before the actual cell change occurs. This allows the UE to receive and process all necessary information in advance, enabling seamless cell changes without requiring additional signaling steps or message exchanges
Solution Approach 2:
The patent merges multiple functions into the reconfiguration message: it combines measurement configurations, execution conditions (A3/A5 events), and cell change instructions into a single integrated message structure. This consolidation enables seamless cell changes by delivering all necessary control information in one message, though it increases the message structure complexity
Data Source
AI summary
There is provided an apparatus (402, 502, 602) comprising: means for connecting with a user equipment that is in dual connectivity with the master node and a secondary node, wherein the secondary node comprises a primary secondary cell; means for generating a configuration for the user equipment, the configuration for causing the user equipment to associate a special cell with the primary secondary cell of the secondary node; and means for receiving a cell reconfiguration complete message from the user equipment.