Roaming Priority Control for QoS-Aware Terrestrial Handover
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Solution Overview
Problem
Existing 5G wireless communication systems face challenges in efficiently managing roaming priorities for user equipment (UE) between terrestrial and non-terrestrial radio network nodes, particularly in ensuring quality-of-service requirements for varying latency and reliability needs.
Innovation Solution
A method and system for determining and facilitating roaming priorities based on quality-of-service (QoS) information, including transmitting user equipment roaming information to enable seamless communication sessions between terrestrial and non-terrestrial nodes, utilizing processors and machine-readable media to process instructions for connection establishment and traffic delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If roaming priority information is not considered, then network node selection is simplified, but quality-of-service requirements for latency and reliability cannot be met
Solution Approach 1:
The system performs preliminary actions by pre-configuring roaming priority information in network nodes and pre-establishing QoS profiles before roaming events occur. The AMF retrieves and stores roaming priority information in advance, and network nodes are pre-configured with QoS parameters, enabling fast and reliable roaming decisions without complex real-time calculations.
Solution Approach 2:
The system implements feedback mechanisms where the AMF receives roaming priority information from the core network, processes this information, and provides feedback by selecting appropriate network nodes based on QoS requirements. The selected network node then confirms its ability to meet the QoS parameters, creating a closed-loop feedback system that ensures reliable roaming.
2Reliability
If multiple network nodes are evaluated for roaming, then QoS requirements are better met, but connection establishment time increases
Solution Approach 1:
The system applies preliminary action by pre-retrieving and storing roaming priority information in the AMF before roaming events occur. Network nodes are pre-configured with QoS profiles and priority indications, so when a roaming decision is needed, the system can immediately evaluate pre-existing information rather than performing complex real-time assessments, thus reducing connection establishment time while maintaining QoS requirements.
Solution Approach 2:
The system changes parameters by transforming complex QoS evaluation into simplified priority-based decisions. Instead of evaluating multiple network nodes on multiple QoS dimensions in real-time, the system uses pre-established priority indications and QoS profiles as simplified parameters, enabling faster network node selection while still meeting QoS requirements.
3Adaptability or versatility
If roaming priority information is processed, then user equipment can select optimal network nodes, but information processing complexity increases
Solution Approach 1:
The system segments the complex roaming decision process into separate functional components: the AMF handles information retrieval and processing, while individual network nodes handle selection based on priority indications. This segmentation divides the complex information processing task into manageable parts, reducing the processing complexity burden on any single component while maintaining flexible network node selection.
Solution Approach 2:
The AMF acts as an intermediary that simplifies information processing between the core network and network nodes. It retrieves roaming priority information from the core network, processes this information into actionable selections, and communicates with network nodes using simplified priority indications rather than complex QoS data, thus reducing information processing complexity while maintaining selection flexibility.
4Reliability
If QoS profiles are enforced during roaming, then service quality is maintained, but network resource allocation becomes more complex
Solution Approach 1:
The system changes parameters by transforming detailed QoS profile enforcement into simpler priority-based resource allocation. Network nodes are configured with QoS profiles and priority indications in advance, and during roaming, they simply need to allocate resources according to these pre-established priorities rather than performing complex real-time QoS profile matching and enforcement, thus maintaining service quality while reducing allocation complexity.
Data Source
AI summary
A user equipment may be associated with a guaranteed quality-of-service with respect to a home network. The user equipment may request connection establishment with a terrestrial radio network node corresponding to the home network. The home terrestrial node may configure the user requirement with a roaming priority level, a user equipment priority class corresponding thereto, or an identifier associated with a non-terrestrial radio network node corresponding to a network other than the home network. The home terrestrial node may configure the non-terrestrial node with the user equipment priority class. Upon roaming into signal coverage corresponding to the non-terrestrial node, the user equipment may establish a connection therewith, based on the priority class, that facilitates communicating according to the guaranteed quality-of-service. If connection establishment with the non-terrestrial node fails, the user equipment may establish connection with a roaming terrestrial node based on a roaming priority level indication broadcast thereby.