SMF Session Control for Dynamic Satellite Backhaul Delay
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Solution Overview
Problem
The integration of satellite technology in the backhaul section of 5G mobile communication systems introduces variable network delays and high latency, necessitating a mechanism for dynamic session management to ensure quality of service (QoS) and policy control in wireless communication systems.
Innovation Solution
A method and device for dynamic backhaul network delay-based session management, where the Session Management Function (SMF) receives information about the use of a dynamic satellite backhaul, triggering QoS monitoring and policy control through the Policy Control Function (PCF), which adapts policy and charging rules based on real-time delay measurements from the User Plane Function (UPF) and Radio Access Network (RAN).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If satellite technology is integrated in the backhaul section, then network coverage and capacity are improved, but network delay increases
Solution Approach 1:
The patent implements dynamic session management that adapts to changing network conditions. The SMF dynamically selects UPFs and adjusts session parameters based on real-time backhaul delay measurements, enabling the system to optimize performance despite the inherent high latency of satellite backhaul connections.
Solution Approach 2:
The patent modifies session management parameters such as UPF selection criteria, packet routing decisions, and QoS parameters based on measured backhaul delay values. By changing these parameters dynamically according to actual network conditions, the system compensates for the increased delay introduced by satellite backhaul.
2Reliability
If dynamic session management is implemented, then QoS is improved, but device complexity increases
Solution Approach 1:
The patent establishes a feedback mechanism where the SMF receives backhaul delay measurements from the UPF and uses this information to adjust session management decisions. This closed-loop feedback enables automatic adaptation to network conditions without requiring complex manual configuration.
Solution Approach 2:
The session management system performs self-optimization by automatically selecting appropriate UPFs and adjusting session parameters based on real-time delay measurements. The system serves itself by making intelligent decisions about packet routing and resource allocation without external intervention.
3Measurement precision
If backhaul delay monitoring is implemented, then policy control accuracy is improved, but measurement overhead increases
Solution Approach 1:
The patent implements selective monitoring where the SMF requests delay measurements only when needed for session management decisions. The system monitors key performance parameters such as packet arrival time and round-trip delay, focusing measurement efforts on critical session parameters rather than continuously monitoring all possible metrics.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to an aspect of the disclosure, a method by a session management function (SMF) in a wireless communication system may comprise receiving, from an access and mobility management function (AMF), a first message including information indicating that a dynamic satellite backhaul is used; transmitting, to a policy control function (PCF), a second message indicating that the dynamic satellite backhaul is used based on receiving the first message, wherein the PCF triggers a quality of service (QOS) monitoring operation for the dynamic satellite backhaul based on the second message.