Conditional Handover Profiles for NTN-to-Terrestrial Traffic Transfer
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Solution Overview
Problem
Existing 5G wireless communication systems face challenges in managing resource loads and optimizing energy efficiency during handovers between terrestrial and non-terrestrial radio network nodes, particularly in scenarios involving varying quality-of-service classes like URLLC, eMBB, and mMTC, especially for mobile devices with dynamic communication demands.
Innovation Solution
A method and system for analyzing energy parameters to determine handover criteria, facilitating conditional handover commands, and managing communication sessions between non-terrestrial and terrestrial radio network nodes based on energy saving criteria, using conditional handover profiles and quality of service indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If handover between non-terrestrial and terrestrial radio network nodes is performed without energy parameter analysis, then handover speed is improved, but energy efficiency deteriorates
Solution Approach 1:
The system performs preliminary energy parameter analysis and conditional handover configuration before actual handover occurs. Energy parameters are measured and analyzed in advance, and handover commands are prepared with conditional criteria, enabling fast handover execution while maintaining energy efficiency through pre-computed decisions.
2Use of energy by moving object
If energy parameter analysis is performed for handover decisions, then energy efficiency is improved, but handover decision time increases
Solution Approach 1:
Energy parameter analysis is performed in advance before handover events occur. The system continuously monitors energy parameters and pre-determines handover conditions, so when handover becomes necessary, the decision can be made quickly without real-time analysis delays.
Solution Approach 2:
The system implements feedback mechanisms where energy parameter measurements are continuously monitored and fed back into the handover decision process. This enables dynamic adjustment of handover criteria based on actual energy conditions while maintaining efficient decision-making through established feedback loops.
3Adaptability or versatility
If conditional handover configuration is implemented with multiple quality of service profiles, then adaptability is improved, but device complexity increases
Solution Approach 1:
The handover configuration is segmented into multiple quality of service profiles, each handling specific service types independently. This segmentation allows the system to manage complex handover scenarios by dividing them into manageable, service-specific configurations rather than a single monolithic complex system.
Solution Approach 2:
Different quality of service profiles are applied locally to different service types and handover scenarios. Each profile is optimized for specific requirements (e.g., URLLC, eMBB, mMTC), allowing tailored handover behavior for each service without requiring the entire system to handle all complexity uniformly.
Data Source
AI summary
A non-terrestrial radio network node may configure user equipment with conditional handover period information and conditional handover configuration information. During establishment of a connection to facilitate delivery of non-terrestrial traffic, the non-terrestrial node may configure a user equipment with an assigned conditional handover profile indication corresponding to the non-terrestrial traffic. Upon determining to suspend delivery of the non-terrestrial traffic during a network energy saving mode, the non-terrestrial node may transmit a conditional handover command, responsive to which the user equipment may determine, based on the assigned conditional handover profile indication and the conditional handover configuration information, a target terrestrial radio network node and may transmit a connection establishment request thereto. Responsive to a connection transfer request transmitted by the target terrestrial node, the non-terrestrial node may transmit session context information corresponding to the non-terrestrial traffic that the target node may use to facilitate delivery thereof during the conditional handover period.