Mobility SD-WAN Traffic Segmentation for Multi-Network Handoffs
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Solution Overview
Problem
Existing satellite communication systems face challenges with high latency, poor responsiveness, and high cost per gigabyte for data transfer, especially in mobility environments, while ground-based wireless systems suffer from low latency and degraded network performance.
Innovation Solution
A software-defined wide area network (SD-WAN) system that manages seamless handoffs between high throughput satellite (HTS) spot beams and low-latency wireless cells by using multiple network transport modems, classifying packets into interactive and bulk traffic, and dynamically selecting the best path for transmission based on real-time network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If geosynchronous HTS systems are used to provide high throughput and broad coverage, then data capacity and coverage area are improved, but latency and responsiveness deteriorate due to long round-trip delay
Solution Approach 1:
The patent segments traffic into interactive traffic and bulk traffic, routing them through different paths (wireless network for interactive, satellite network for bulk) to simultaneously achieve low latency for time-sensitive applications and high throughput for data-intensive applications
Solution Approach 2:
The patent introduces a mobile edge computing (MEC) server as an intermediary that processes interactive traffic locally before forwarding bulk traffic to the satellite network, reducing round-trip delay while maintaining high data capacity
2Loss of time
If ground-based wireless systems are used to provide low latency connectivity, then responsiveness is improved, but cost per gigabyte for bulk data transfer increases
Solution Approach 1:
The patent segments traffic by type and routes interactive traffic through ground-based wireless networks for low latency while directing bulk traffic through satellite networks for lower cost per gigabyte
Solution Approach 2:
The patent dynamically changes routing parameters based on traffic type, using wireless networks for time-sensitive interactive traffic and satellite networks for cost-effective bulk data transfer
3Adaptability or versatility
If a terminal switches across multiple HTS spot beams and wireless cells during mobility, then coverage and versatility are improved, but connection stability and reliability deteriorate due to handoff disruptions
Solution Approach 1:
The patent establishes TCP connection continuity mechanisms in advance before handoff occurs, maintaining connection state information and pre-configuring routing paths to ensure seamless transitions between spot beams and wireless cells without disrupting active connections
Solution Approach 2:
The patent implements mechanisms to maintain continuous TCP connections during mobility by preserving connection state information and ensuring uninterrupted data flow across handoff boundaries between different networks and spot beams
Data Source
AI summary
A system and method for managing handoff in software-defined wide area network (SD-WAN) in aero or mobility situations, where terminal is capable of switching across multiple high throughput satellite (HTS), low-latency wireless spot beams and cell. The system receives at least one packet for upstream/downstream transmission over communication network. The system classifies packets based on data types associated with packets and assigns wireless path associated with first network transport modem for upstream/downstream transmission of packets classified as interactive traffic data type. Furthermore, system assigns satellite path associated with second network transport modem for upstream/downstream transmission of packets classified as bulk traffic data type. Further, system estimates available capacity for upstream/downstream transmission of packets associated with first and/or second network transport modem. Furthermore, system adjusts rate limited priority queue for continuity of TCP connection corresponding to packets, responsive to change in network conditions of communication network during the upstream/downstream transmission.