Dual-Connectivity Handover Using Source-Node Configuration Transfer
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Solution Overview
Problem
In existing mobile communication systems, radio access network nodes struggle to maintain service continuity during dual-connectivity handovers due to the inability to recognize and configure user terminals correctly, leading to poor service continuity.
Innovation Solution
A dual-connectivity handover method where the target master node sends configuration information or an index of the source node to the target secondary node, enabling it to configure the user terminal accordingly, ensuring consistent resource allocation and service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the radio access network node manages thousands of terminals simultaneously during handover, then the system capacity is improved, but the ability to recognize and configure individual terminals deteriorates, resulting in poor service continuity
Solution Approach 1:
The source radio access network node performs preliminary actions by determining the configuration information for the target secondary node before handover occurs. This includes pre-configuring resource allocation, physical resource blocks, and transmission parameters that will be used by the target secondary node, ensuring seamless service continuity when the terminal switches nodes.
Solution Approach 2:
The source radio access network node acts as an intermediary that bridges the terminal and the target secondary node. It determines and communicates the necessary configuration information to enable the target secondary node to properly serve the terminal, solving the recognition problem through this intermediate coordination step.
2Adaptability or versatility
If the target secondary node reconfigures low layer resources during handover, then the terminal can be served by the new node, but service continuity deteriorates due to resource reconfiguration
Solution Approach 1:
The target secondary node copies the configuration information from the source node instead of creating new configurations. The source node determines the configuration information including resource allocation and transmission parameters, which are then transmitted to the target secondary node for direct application, maintaining consistency and avoiding service disruption.
Solution Approach 2:
The configuration information is determined in advance by the source node before the handover is executed. This preliminary determination ensures that when the target secondary node receives the configuration, it can immediately apply it without needing to reconfigure resources, thus maintaining service continuity.
3Device complexity
If the target secondary node cannot determine whether the accessed terminal is the one it originally served, then node management is simplified, but service continuity deteriorates due to inability to recognize terminal
Solution Approach 1:
The source radio access network node provides feedback information to the target secondary node through the configuration information transmission. This feedback includes terminal identification and configuration details that enable the target secondary node to recognize the terminal and maintain proper service continuity without increasing overall system complexity.
Data Source
AI summary
A dual-connectivity handover method, a handover device and a storage medium. The target dual connectivity further comprises a target secondary node. A user terminal communicates with a source node before accessing the target dual connectivity. The method comprises: receiving handover request information, wherein the handover request information carries first information, and the first information is configuration information of the source node for the user terminal, or an index of the configuration information; and sending a first interface message to the target secondary node, wherein the first interface message carries the first information for enabling the target secondary node configure the user terminal according to the first information.