Conditional Handover for Dual-Connectivity Service Continuity
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Solution Overview
Problem
Conditional handover in dual-connectivity scenarios leads to reduced service experience for user equipment due to inadequate consideration of triggering events of the secondary cell, resulting in interruptions of high-rate data services and inability to perform dual-connectivity, which the existing technologies have not adequately addressed.
Innovation Solution
The method involves performing a conditional handover procedure from the source PCell to the target PCell only when both the primary and secondary cells meet specific events, thereby avoiding interruptions of high-rate data services and enhancing service experience by ensuring both conditions are met, thus improving service experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conditional handover is performed in dual-connectivity scenario considering only PCell events, then handover procedure is simplified, but service experience is reduced due to interruptions of high-rate data services
Solution Approach 1:
The handover decision process is segmented into two independent evaluation parts: PCell handover event evaluation and PSCell handover event evaluation. The UE separately determines whether each cell meets its respective handover events, and only performs handover when both conditions are satisfied. This segmentation allows the system to maintain simplified procedures while improving service experience by considering both primary and secondary cell conditions.
2Speed
If conditional handover triggers based on PCell events only, then handover execution is faster, but dual-connectivity capability is lost resulting in service interruptions
Solution Approach 1:
The network pre-configures handover events for both PCell and PSCell before the handover execution. The UE evaluates both events in advance and prepares for handover only when both conditions are met. This preliminary evaluation of dual-connectivity conditions ensures that handover execution can proceed quickly without compromising the dual-connectivity capability, as the decision criteria are already established.
Data Source
AI summary
The present disclosure provides a conditional handover method, an information transmission method, an information processing method, device and equipment. The conditional handover method is performed by a user equipment (UE) which is connected to a primary cell (PCell) and a primary secondary cell (PSCell). The method includes: in a case where there is a target primary cell (PCell) that meets a first handover event and a PSCell that meets a second handover event, performing a conditional handover procedure from the source PCell to the target PCell.