Conditional Multi-Bearer Handover for Critical Service Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in stably providing important communication services, particularly in high-speed aerial situations like uncrewed aerial systems (UAS), due to limitations in handover methods for different bearer configurations.
Innovation Solution
A method and apparatus for configuring two or more bearers for a communication service flow and implementing a conditional handover, allowing seamless handover by satisfying specific conditions, thereby ensuring stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single bearer is used for communication service, then device complexity is reduced, but reliability deteriorates in high-speed aerial situations
Solution Approach 1:
The communication service is segmented into multiple bearers (first bearer and second bearer) that can be independently managed and handed over. This allows the system to distribute communication load across multiple paths, improving reliability without requiring complete reconfiguration of the entire communication stack.
Solution Approach 2:
The source base station pre-configures handover parameters and bearer information before handover is needed. The UE receives and stores handover configuration information in advance, including bearer-specific parameters, so that when handover is triggered, the transition can execute immediately without complex real-time negotiations.
2Reliability
If conditional handover with multiple bearers is implemented, then handover reliability is improved, but signaling complexity increases
Solution Approach 1:
Multiple bearer handover procedures are merged into a single unified handover execution. The UE evaluates conditions for multiple bearers simultaneously and executes handover for all configured bearers in one operation, rather than performing separate handover procedures for each bearer, thereby reducing overall signaling complexity.
Solution Approach 2:
The handover configuration information is copied and stored at the UE in advance from the source base station. This includes bearer parameters, target cell information, and condition thresholds. When handover is triggered, the UE uses these pre-copied configurations to execute handover without requiring real-time parameter negotiation, reducing signaling overhead.
3Productivity
If bearers are added sequentially after first bearer handover, then resource efficiency is improved, but handover time increases
Solution Approach 1:
The target base station is pre-notified and prepares resource allocations for multiple bearers before the UE actually executes handover. The source base station includes information about multiple bearers in the handover request message, allowing the target to prepare接纳 resources in advance, so that when the UE hands over, multiple bearers can be established simultaneously rather than sequentially.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present document relates to a method for performing a conditional handover for a critical communication service, and a device therefor. To this end, a method for performing a handover by a user equipment (UE) in a mobile communication system comprises: receiving, through two or more bearers, one communication service flow with a source network; receiving a first message including configuration information for performing a conditional handover for the two or more bearers from the source network; and on the basis of a target network and a time point at which a condition according to the configuration information is met, performing the handover for the two or more bearers to the target network.