Aerial Service Session Management for Cross-Slice Handover Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing session and service continuity for Unmanned Aerial Systems (UAS) due to the dynamic nature of aerial vehicles, which require seamless connectivity across various network slices and access types, including 4G and 5G networks, to ensure uninterrupted service delivery.
Innovation Solution
The implementation of enhanced session management and network slicing features in 4G/5G systems, utilizing network functions such as AMF, SMF, UPF, and PCF, to manage registration, connection, and QoS for UAS, ensuring robust connectivity and service continuity through network slicing and edge computing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional session management is used for aerial vehicles, then device complexity is reduced, but service continuity and reliability deteriorate due to dynamic mobility and handover failures
Solution Approach 1:
The patent segments session management into multiple specialized network functions (AMF for access management, SMF for session management, UPF for user plane, PCF for policy control) to handle different aspects of aerial vehicle connectivity independently, improving reliability through distributed functionality
Solution Approach 2:
The patent introduces a dedicated Session Management Function (SMF) as an intermediary between the Access and Mobility Management Function (AMF) and the User Plane Function (UPF), coordinating handovers and session transitions to maintain service continuity during aerial vehicle mobility
2Adaptability or versatility
If network slicing is implemented for UAS, then adaptability and service customization are improved, but device complexity and network configuration difficulty increase
Solution Approach 1:
The patent implements network slicing where a single physical network infrastructure supports multiple virtual network slices (e.g., Slice A for control signals, Slice B for video streams) with different QoS parameters, enabling one network to serve multiple UAS applications simultaneously
Solution Approach 2:
The patent enables dynamic adjustment of network slice parameters (bandwidth, latency, priority) through the Policy Control Function (PCF) based on UAS requirements, allowing the same physical network to adapt to different service needs without hardware changes
3Reliability
If seamless handover between access types is enabled, then service continuity is improved, but loss of time for handover processing and network resource coordination increases
Solution Approach 1:
The patent establishes session context and network resource reservations in advance during the registration phase, so that when handover is needed, the SMF can quickly activate pre-configured resources without extensive real-time negotiation, reducing handover latency
Data Source
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AI summary
A mobility management function receives, from a wireless device, a registration request message for the wireless device. The mobility management function determines authentication and/or authorization (AA) of an aerial service of the wireless device. The mobility management function receives, from the wireless device, a request for a session establishment of the aerial service. The mobility management function sends, to a session management function (SMF), based on the request for the session establishment, an indication of the AA of the aerial service of the wireless device.