5G Session Management for Satellite Backhaul Latency
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Solution Overview
Problem
The integration of satellite technology in the backhaul section of 5G communication systems introduces high latency and variable network situations, requiring a mechanism to maintain quality of service (QoS) and necessitating changes in session management methods, including NF selection and QoS profile selection.
Innovation Solution
The proposed solution involves the AMF and SMF determining and setting backhaul network-related information during configuration, and initiating a change procedure when high latency occurs, using N4 association setup and update procedures to manage session management effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If satellite technology is integrated into the backhaul section, then network coverage and connectivity are improved, but latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring backhaul network information during network setup, including storing backhaul network identifiers, types, and characteristics in network functions before actual data transmission occurs. This allows the system to prepare and cache necessary configuration data in advance, reducing the time needed for network setup and enabling faster response when satellite backhaul is activated, thereby mitigating the inherent latency of satellite communications.
Solution Approach 2:
The patent implements dynamics by enabling dynamic selection and switching between different backhaul networks (satellite and terrestrial) based on real-time network conditions, latency measurements, and availability. The system can dynamically adjust the backhaul path during operation, transitioning between satellite and wired backhaul connections to optimize performance, thus adapting to the latency characteristics of different network paths.
2Adaptability or versatility
If session management is performed with satellite backhaul, then network flexibility is improved, but management complexity increases
Solution Approach 1:
The patent introduces intermediary mechanisms by using network functions (AMF, SMF) as intermediaries that centralize the management of satellite backhaul information. These network functions act as mediators that handle the complexity of satellite network configuration, selection, and management automatically, shielding the rest of the system from the intricacies of satellite backhaul management while providing flexible network adaptation.
Solution Approach 2:
The patent applies preliminary action by pre-establishing backhaul network information, including storing satellite backhaul identifiers, types, and characteristics in network functions during initial network setup. This pre-configuration approach simplifies subsequent management operations by having the necessary information readily available, reducing the complexity of real-time decision-making and enabling streamlined session management.
3Productivity
If backhaul network information is set in advance, then session management efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring and storing backhaul network information during network setup, including backhaul network identifiers, types, and characteristics. This advance preparation allows session management functions to efficiently retrieve and utilize pre-stored information during data transmission, improving session management efficiency without requiring complex real-time processing, thus achieving productivity improvement with acceptable system complexity.
Data Source
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AI summary
According to an embodiment of the disclosure, an operating method of an access and management function (AMF) device in a wireless communication system may include determining a backhaul network to be used for control plane connection from among available backhaul networks, when receiving a registration request message of a user terminal, transmitting a control signal to a radio access network (RAN) device through the determined backhaul network, and selecting a session management function (SMF) device based on the determined backhaul network.