5G Session Management Using Backhaul-Aware AMF and TNLA Selection
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Solution Overview
Problem
Existing 5G communication systems integrating satellite backhaul links face challenges in managing network latency and quality of service (QoS) due to the lack of consideration for backhaul connection types, leading to inefficient UPF selection and potential failures in N3 tunnel information allocation during session establishment.
Innovation Solution
A method and apparatus that utilize backhaul information to select an access and mobility management function (AMF) and transport network layer association (TNLA) based on the type of backhaul network, enabling efficient UPF selection and registration procedures considering latency and QoS limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If satellite backhaul links are integrated into 5G communication systems, then network coverage and accessibility are improved, but network latency increases and QoS management becomes difficult
Solution Approach 1:
The system performs preliminary classification of backhaul link types (satellite vs. terrestrial) and pre-configures appropriate UPF selection criteria and N3 tunnel parameters before actual data transmission. This allows the network to proactively address latency issues by selecting optimal UPFs based on backhaul characteristics rather than reacting to latency problems after they occur.
Solution Approach 2:
The patent applies different quality management strategies to different backhaul link types. For satellite backhaul links, the system applies specific latency tolerance thresholds and UPF selection criteria that differ from terrestrial links. This localized quality management ensures that satellite links receive appropriate handling without affecting the performance of terrestrial links.
2Device complexity
If backhaul information is not considered in session management, then system complexity is reduced, but UPF selection efficiency deteriorates and N3 tunnel allocation may fail
Solution Approach 1:
The patent segments the backhaul network into distinct types (satellite and terrestrial) and processes each type through separate management pathways. The session management function divides UPF selection into different branches based on backhaul type, allowing optimized handling for each segment without requiring a completely complex unified system. This segmentation maintains reasonable overall complexity while improving UPF selection efficiency for each specific backhaul type.
3Ease of manufacture
If satellite backhaul is used, then cost of wired link installation is reduced, but QoS satisfaction becomes challenging due to variable network situations
Solution Approach 1:
The system dynamically changes key parameters including UPF selection criteria, latency thresholds, and N3 tunnel configuration parameters based on the detected backhaul link type. When satellite backhaul is detected, the system adjusts these parameters to account for higher latency and variable network conditions, thereby maintaining QoS satisfaction despite the inherent characteristics of satellite connections.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method by which an access network (AN) node of a wireless communication system manages a session by using backhaul information, according to one embodiment of the present disclosure, may comprise the steps of: selecting an access and mobility management function (AMF) when a registration request message is received from a user equipment (UE); selecting one transport network layer association (TNLA) from among candidate TNLAs for the selected AMF by considering the type of backhaul network of a control plane; transmitting an initial UE message to the selected AMF by using the selected TNLA; and performing a registration procedure of the UE when a selected TNLA response signal is received from the selected AMF, wherein the candidate TNLA can include a low earth orbit (LEO) and/or a geosynchronous earth orbit (GEP).