Conditional Handover Coordination for Multi-RAT Dual Connectivity
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing conditional handovers and data transfers in multiple radio access technology dual connectivity scenarios, leading to suboptimal performance and resource utilization.
Innovation Solution
Implementing methods and apparatuses for conditional handover operations, including receiving secondary node release requests, performing data transfers, and configuring conditional handover and PSCell measurements based on radio access technology dual connectivity configurations, to optimize handover processes and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conditional handover operations are implemented in multiple radio access technology dual connectivity scenarios, then handover reliability is improved, but system complexity increases
Solution Approach 1:
The patent segments the handover process by introducing separate conditional handover configurations for master node and secondary node operations. The source master node and target master node handle different aspects of the handover, with the source node releasing secondary nodes and the target node establishing new connections. This segmentation allows complex dual connectivity handovers to be managed through coordinated simpler operations.
Solution Approach 2:
The source master node performs preliminary actions by releasing secondary nodes associated with the UE before the actual handover to the target master node occurs. This preliminary release prepares the system for the handover by clearing out existing secondary node associations, ensuring a clean transition state and preventing conflicts during the handover process.
2Productivity
If secondary node release requests are processed during conditional handover, then resource utilization is improved, but data transfer continuity may be affected
Solution Approach 1:
The source master node releases secondary nodes in advance as a preliminary action before the UE completes handover to the target master node. This timing ensures that resource reutilization begins early while the data transfer path is being reestablished, minimizing the impact on continuity.
Solution Approach 2:
The source master node acts as an intermediary that coordinates between the secondary node release and the target master node handover completion. It manages the transition by releasing secondary nodes while ensuring the target master node is ready to assume the UE connection, thereby maintaining data transfer continuity through coordinated intermediary control.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive, from a source master node, a secondary node release request corresponding to a conditional handover operation associated with a user equipment (UE) operating in accordance with multiple radio access technology dual connectivity, wherein the secondary node release request indicates that the network node is to continue to be a secondary node associated with the UE or that a target secondary node is to be the secondary node associated with the UE. The network node may perform a data transfer operation based at least in part on receiving the secondary node release request. Numerous other aspects are described.