Dual-Connectivity Handover With Adaptive Data Forwarding Paths
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing handover from dual-connectivity to dual-connectivity, particularly in coordinating data forwarding between source and target base stations, leading to data loss and service interruptions.
Innovation Solution
A method for determining direct or indirect data forwarding paths between source and target base stations, ensuring coordinated work among source master, secondary, target master, and secondary base stations, and the core network, using identification and tunnel allocation mechanisms to minimize data loss and interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct data forwarding path is used between base stations during handover, then data forwarding efficiency is improved, but data loss may occur if the path is unavailable
Solution Approach 1:
The patent introduces a core network element as an intermediary to coordinate data forwarding during handover. When direct data forwarding paths between base stations are unavailable, the core network element acts as a mediator to establish alternative forwarding paths, ensuring data continuity without loss while maintaining improved forwarding efficiency through intelligent path selection.
Solution Approach 2:
The patent implements dynamic path selection mechanisms that adaptively choose between direct and indirect data forwarding paths based on real-time network conditions. The system dynamically adjusts forwarding routes during handover, switching from direct paths when available to indirect paths through the core network when necessary, thereby maintaining both high efficiency and reliability.
2Reliability
If coordinated work among multiple base stations and core network is implemented, then service continuity is improved, but system complexity increases
Solution Approach 1:
The patent segments the handover coordination function into distinct modules distributed across base stations and the core network element. Each node handles specific coordination tasks independently, reducing the complexity burden on any single device while maintaining overall service continuity through collaborative operation of segmented functional units.
Solution Approach 2:
The patent designs the core network element with multi-functional capabilities to handle various handover coordination scenarios. This universal component can manage data forwarding, path selection, and coordination among different base stations, reducing the need for multiple specialized devices and thereby lowering overall system complexity while ensuring service continuity.
3Loss of time
If handover coordination mechanisms are implemented, then data interruption time is reduced, but signaling overhead increases
Solution Approach 1:
The patent implements preliminary action by pre-establishing data forwarding paths and coordination mechanisms before handover occurs. The core network element proactively prepares alternative routes and coordinates with target base stations in advance, enabling seamless handover execution that minimizes data interruption time while optimizing signaling by avoiding last-minute path establishment.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a source master node (MN), is provided. The method includes receiving information that a direct data forwarding path between a source secondary node (SN) and a target MN is available, or information that a direct data forwarding path between the source SN and a target SN is available, or information that both the direct data forwarding path between the source SN and the target MN and the direct data forwarding path between the source SN and the target SN are available; and determining whether to allocate information of a data forwarding tunnel between the target SN and the source MN for a bearer terminated at the target SN.