Onboard Router VoIP Bypass for Train Wireless Reliability
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Solution Overview
Problem
Public transport vehicles, especially trains, face challenges in maintaining reliable wireless communication due to metal shielding, high-speed movement, and increased demand for high-bandwidth internet and voice services, leading to poor performance and user dissatisfaction.
Innovation Solution
A wireless communication system with a router onboard the vehicle that intercepts and forwards VoIP and VoWIFI data streams without authentication, using multiple external mobile networks and optimizing data links for seamless communication, thereby bypassing captive portal requirements for priority voice calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a captive portal authentication process is implemented for all clients, then network security and controlled access are improved, but voice communication latency and reliability deteriorate
Solution Approach 1:
The patent segments the authentication process by creating different handling paths for voice traffic versus other data traffic. Voice packets are identified and routed through a bypass path that skips the captive portal authentication, while other traffic continues to require authentication. This segmentation resolves the contradiction by maintaining security for general access while providing low-latency paths for voice communications.
Solution Approach 2:
The router acts as an intermediary that intercepts voice traffic before it reaches the captive portal authentication process. By identifying voice packets and forwarding them directly to the external mobile network without requiring authentication, the router mediates between the security requirements of the captive portal and the latency requirements of voice communication.
2Productivity
If multiple external mobile networks are used for high-bandwidth internet access, then data transmission capacity is improved, but system complexity and management difficulty increase
Solution Approach 1:
The router is designed with multi-functionality to handle multiple external mobile networks simultaneously. It can establish and manage connections to several different mobile networks, automatically selecting and switching between them based on signal quality, bandwidth requirements, and cost considerations. This universal capability allows the system to leverage multiple networks for high-bandwidth internet access while the router's integrated intelligence manages the complexity of coordinating these multiple connections.
3Reliability
If voice traffic is prioritized without authentication, then voice communication quality is improved, but network access control and security policies are compromised
Solution Approach 1:
The patent applies local quality by implementing selective authentication bypass specifically for voice traffic while maintaining authentication requirements for other types of traffic. The router inspects incoming packets and applies different authentication rules based on traffic type - voice packets receive preferential treatment with direct forwarding, while other packets undergo full captive portal authentication. This localized approach to quality of service maintains security policies for general access while ensuring high-quality voice communication.
Data Source
AI summary
A method and system for wireless communication between a public transport vehicle and a remote server through at least one external mobile network. At least one router is provided in the public transport vehicle for receiving and transmitting wireless data to and from a stationary communication server outside the public transport vehicle and to and from at least one client onboard the public transport vehicle, wherein router includes a captive portal in order to provide an authentication process for the client(s). The router determines if a stream of wireless data packets received by said router corresponds to at least one of a VoIP stream and a VoWIFI stream. The router then forwards, if it has been determined that the stream of wireless data packets corresponds to at least one of a VoIP stream and a VoWIFI stream.