NTN Communication Path Control for End-to-End QoS Routing
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Solution Overview
Problem
Existing routing technologies in non-terrestrial networks (NTNs) fail to consider end-to-end quality of service (QoS) requirements for various applications, leading to unsatisfied QoS in multi-layer satellite networks.
Innovation Solution
A wireless communication system that collects QoS information, predicts communication quality, determines optimal paths, and distributes routing tables to ensure QoS satisfaction across non-terrestrial networks by integrating a control station that manages communication paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing routing technologies are used in multi-layer satellite networks, then network connectivity is established, but end-to-end QoS requirements for various applications are not satisfied
Solution Approach 1:
The routing control is segmented into two parts: a control station that performs centralized path determination based on QoS requirements, and communication stations that execute routing according to distributed routing tables. This segmentation allows QoS-sensitive routing logic to be集中 at the control station while keeping individual communication stations simple.
Solution Approach 2:
The control station acts as an intermediary between application QoS requirements and network routing decisions. It collects QoS information from applications, predicts communication quality across multiple communication stations, and determines optimal paths, thereby mediating between service requirements and network infrastructure.
2Reliability
If centralized path determination based on QoS is implemented, then QoS requirements are satisfied, but system complexity increases due to control station functions
Solution Approach 1:
The control station performs self-service by automatically collecting QoS information from applications, predicting communication quality, and determining optimal paths without manual intervention. This automation reduces operational complexity while maintaining QoS guarantees.
Solution Approach 2:
The system implements feedback mechanisms where the control station collects actual communication quality information from communication stations and uses it to adjust path determination. This feedback loop enables adaptive routing that maintains QoS satisfaction while optimizing resource utilization.
3Ease of operation
If routing tables are distributed to communication stations, then path determination is decentralized, but real-time QoS adjustment capability is reduced
Solution Approach 1:
The control station performs preliminary actions by pre-calculating optimal paths based on predicted communication quality and distributing routing tables to communication stations in advance. This preliminary path determination ensures that routing decisions are made ahead of time based on anticipated QoS conditions.
Solution Approach 2:
The system maintains dynamics by allowing the control station to re-calculate and redistribute routing tables when QoS conditions change. While individual communication stations use static routing tables for simple execution, the overall system adapts dynamically through periodic or event-triggered routing table updates from the control station.
Data Source
AI summary
A plurality of communication stations such as aerial vehicles, LEO satellites and GEO satellites transfer packets by mutually establishing links. A UE connects to the aerial vehicle providing a service area and transmits and receives packets to and from a data network. A route control device collects information on the required QoS corresponding to the service type of the UE, predicts the communication qualities of the links between the communication stations, and determines a communication path based on the communication qualities so that the required QoS is satisfied between the aerial vehicle and the data network. The communication stations included in the communication path receive distribution of a routing table including the transfer destination information of the traffic and transfer the packet according to the information.