Conditional Configuration for Seamless Handover
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Solution Overview
Problem
In wireless communication systems, during handover procedures, the Radio Access Network (RAN) often fails to manage resource requests from the Core Network (CN) effectively, particularly when a UE is executing a conditional procedure, leading to disruptions in resource management and communication.
Innovation Solution
The RAN generates a conditional configuration for the UE, allowing it to disconnect from one base station and connect to another based on specific conditions, and sends appropriate messages to ensure seamless resource management and communication during handover procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RAN generates a conditional configuration for the UE to disconnect from one base station and connect to another, then handover flexibility and communication continuity are improved, but resource management complexity and coordination difficulty increase
Solution Approach 1:
The RAN generates and stores conditional configurations in advance, before handover is actually needed. These configurations include pre-configured resource allocation, bearer settings, and other parameters that will be needed during handover. When handover conditions are met, the UE can immediately apply the pre-prepared configuration without waiting for real-time setup, thus maintaining communication continuity while reducing the complexity of real-time resource management
Solution Approach 2:
The patent introduces a conditional configuration message as an intermediary between the RAN and UE. This message carries pre-negotiated handover parameters and resource allocations from the target base station, acting as a mediator that simplifies the handover process. The conditional configuration serves as a prepared agreement that both source and target RAN nodes have coordinated, reducing the complexity of real-time coordination during actual handover execution
2Speed
If the RAN prioritizes conditional handover preparation procedures, then handover execution speed is improved, but resource management procedure completion may be delayed or failed
Solution Approach 1:
The RAN performs preliminary actions by generating conditional configurations and pre-coordinating resource allocations with target base stations before actual handover execution. This includes pre-setting up bearers, allocating resources, and preparing all necessary parameters. By completing these actions in advance, the RAN enables fast handover execution without compromising resource management procedure completion, as all resource arrangements are already finalized in the conditional configuration
Solution Approach 2:
The patent implements feedback mechanisms where the RAN monitors the status of resource management procedures and adjusts conditional configuration generation accordingly. If resource management procedures are pending or in progress, the RAN can delay or modify conditional configuration generation to ensure proper coordination. This feedback loop allows the system to balance handover speed with resource management completion by making real-time decisions based on current resource allocation status
Data Source
AI summary
A radio access network (RAN) for configuring a user equipment (UE) generates (i) a conditional configuration, and (ii) a condition to be satisfied before the UE applies the conditional configuration (1402), receives, from a core network (CN), an interface message indicating to configure the UE (1404), determines that the interface message affects the conditional configuration (1406), generates a message related to the conditional configuration in view of the received interface message (1408), and transmits the message to the UE (1410).