Satellite Core Network Element Selection for Dynamic Topology and Low Latency
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Solution Overview
Problem
Conventional terrestrial networks face challenges in providing seamless coverage in areas where base stations cannot be deployed, such as seas or deserts, and satellite-based networks suffer from high latency and dynamic network topology changes, making core network maintenance difficult.
Innovation Solution
A method for dynamically updating a dedicated core network satellite network element set, involving a first and second core network satellite network element, where the first element accompanies the access network satellite network element, to reduce latency in satellite-terrestrial core network signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a core network is deployed on a space-based platform, then seamless coverage for terminals is provided, but network topology changes dynamically and maintenance becomes difficult
Solution Approach 1:
The patent segments the core network into multiple network elements distributed across different satellites. Each satellite carries specific core network functions, allowing independent management and maintenance of individual elements without affecting the entire network. This segmentation enables targeted updates and repairs while maintaining overall network continuity.
Solution Approach 2:
The patent implements a universal satellite platform that can host multiple types of core network elements (AMF, SMF, UPF, etc.). This multi-functional design allows the same infrastructure to provide diverse network services, reducing the need for specialized maintenance procedures for different network functions and simplifying operational complexity.
2Area of stationary object
If a 5G base station is deployed on a satellite to provide coverage, then terrestrial network coverage is extended, but round-trip transmission latency increases
Solution Approach 1:
The patent transitions from a single ground-based core network to a multi-dimensional space-based core network distributed across multiple satellites at different orbital positions. This spatial distribution creates multiple transmission paths and enables the selection of optimal routing routes, reducing round-trip latency while maintaining extended coverage area.
Solution Approach 2:
The patent introduces intermediate caching mechanisms and local service functions on satellites that act as mediators between user terminals and the ground-based core network. This intermediary layer reduces the need for direct long-haul transmissions to ground stations, thereby decreasing transmission latency while preserving extended coverage capability.
Data Source
AI summary
An access network satellite network element receives an access request from a terminal, obtains network topology information of a plurality of core network satellite network elements from an interface management function network element, determines a candidate core network satellite network element set based on a location area in which the access network satellite network element is located and the network topology information, where the candidate core network satellite network element set is a subset of the plurality of core network satellite network elements, and determines, from the candidate core network satellite network element set, a core network satellite network element set corresponding to the terminal based on an identifier of the access network satellite network element, an identifier of the terminal, and/or a location of the terminal.