Train Router Intercepting VoIP in Silent Compartments
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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 the increasing demand for data and voice services, which leads to performance degradation and difficulties in enforcing silence in quiet compartments.
Innovation Solution
A wireless communication system with a router that can recognize and intercept VoIP and VoWIFI calls within silent compartments, allowing other data communication to continue uninterrupted, ensuring passengers can use Wi-Fi for non-voice activities while maintaining quietness by configuring access points to silent mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cellular repeaters are installed in silent coaches to enable telephone calls, then voice communication availability is improved, but noise disturbance to other passengers increases
Solution Approach 1:
The patent extracts and removes voice communication functionality from silent compartments by blocking VoIP and VoWIFI data streams at the router level, while leaving data communication intact. This selectively eliminates the harmful voice communication aspect while preserving beneficial data access.
Solution Approach 2:
The router acts as an intermediary device that intercepts and filters data traffic between the cellular repeater system and passengers' devices. It identifies and blocks voice communication protocols (VoIP, VoWIFI) while allowing data traffic to pass through, thereby mediating between communication needs and silence requirements.
2Object-affected harmful factors
If access points are removed from silent coaches to prevent voice calls, then noise disturbance is reduced, but data communication capability is lost
Solution Approach 1:
The patent extracts only the voice communication function from the access point system by implementing protocol-specific blocking at the router level. This allows access points to remain installed and continue providing data communication services while selectively eliminating voice call capabilities.
Solution Approach 2:
The patent applies different treatment to different types of data traffic: voice communication protocols (VoIP, VoWIFI) are blocked in silent compartments, while data communication protocols are allowed to proceed. This creates local quality differentiation within the same network infrastructure.
3Reliability
If cellular repeaters and access points are installed throughout the train to ensure comprehensive coverage, then communication reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the existing router and access point infrastructure multi-functional by adding intelligent traffic filtering capabilities to the router. This single addition enables the system to simultaneously provide comprehensive communication coverage, enforce silence policies, and maintain data connectivity without requiring separate dedicated systems.
Solution Approach 2:
The patent merges the silence enforcement functionality with the existing communication infrastructure by implementing protocol blocking at the router level. This combines multiple functions (coverage provision, traffic management, silence enforcement) into a unified system rather than adding separate independent systems.
Data Source
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AI summary
A method and system for wireless communication between a public transport vehicle, such as a train, and a remote server through at least one external mobile network are disclosed. 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. 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, e.g. by accessing a blacklist with predefined ports and/or destination addresses. It is further determined if the client associated with the stream is within the access area of an access point which is set in a silent compartment mode. If it is determined that the stream of wireless data packets corresponds to at least one of a VoIP stream and a VoWIFI stream and that the client associated with the stream is within the access are of an access point set in a silent compartment mode, the stream is intercepted.