Conditional Primary Secondary Cell Group Change With Configuration Retention
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Solution Overview
Problem
In wireless communications systems, the release of configurations during conditional primary secondary cell group change (CPAC) and conditional handover (CHO) procedures leads to inefficiencies, increased latency, and potential failures due to the need for repeated configuration and measurement reporting.
Innovation Solution
The described techniques maintain configurations by providing node update procedures with reduced handover commands or layer 1/layer 2 signaling, allowing UEs to dynamically update configurations without immediate trigger conditions, thereby maintaining configurations post-addition/change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If configurations are released during conditional primary secondary cell group change and handover procedures, then the system can perform fresh configuration setup, but it causes increased latency and repeated configuration/measurement reporting
Solution Approach 1:
The patent applies preliminary action by preparing multiple target nodes with their configurations in advance before the actual handover occurs. The network entity configures candidate target nodes beforehand, so when handover is needed, the UE can switch to a pre-configured target node without waiting for configuration setup, thereby reducing handover latency while maintaining configuration reliability.
Solution Approach 2:
The patent uses copying by having the network entity provide the UE with configurations of multiple candidate target nodes. Instead of setting up a completely new configuration during handover, the UE receives copied configuration data from the network entity about the target nodes, allowing rapid switching without repeated configuration setup.
2Reliability
If configurations are released during conditional primary secondary cell group change, then the system avoids configuration conflicts, but it causes unnecessary retransmissions and measurement reports
Solution Approach 1:
The patent applies preliminary action by validating and preparing multiple candidate target node configurations in advance. The network entity pre-determines suitable target nodes and prepares their configurations, so when handover is triggered, the UE can directly use the pre-validating configurations without needing to perform new measurement reports or risk configuration conflicts, thereby improving communication efficiency while maintaining correctness.
Solution Approach 2:
The patent uses feedback mechanisms where the UE reports measurement results to the network entity, which then uses this feedback to select appropriate target nodes and configure them. This feedback loop ensures configuration correctness by base decisions on actual network conditions while avoiding unnecessary retransmissions by planning the handover path in advance.
3Productivity
If the UE performs node update procedure with configuration maintenance, then it reduces the need for repeated configuration setup, but it requires maintaining multiple node configurations
Solution Approach 1:
The patent applies segmentation by dividing the configuration management into separate functional parts: the network entity manages the selection and provision of multiple candidate target node configurations, while the UE manages only the active configuration and the ability to switch between pre-provided configurations. This segmentation reduces UE complexity while maintaining high configuration setup efficiency through the node update procedure.
Solution Approach 2:
The patent uses universality by designing the node update procedure to handle multiple scenarios (handover, addition, change) using the same configuration maintenance mechanism. The UE can maintain and switch between multiple node configurations using a unified approach, reducing the need for separate handling of each scenario and thereby improving overall efficiency without proportionally increasing complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The method includes a user equipment (UE) receiving signaling from a network entity that indicates a set of multiple node configurations for a set of multiple target nodes, receiving a command from the network entity to perform a node update procedure associated with the set of multiple node configurations, performing the node update procedure based on receiving the command, maintaining at least one of the set of multiple node configurations after performing the node update procedure, and communicating based on results of the node update procedure.