Gateway-Assisted IoT Identification Across Address-Converted Networks
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Solution Overview
Problem
Existing methods fail to effectively identify and manage IoT devices connected to a local 5G network via a mobile router, as the transmission source IP address and port number are converted, making it difficult for terminal identification devices to recognize these devices and control their connection availability to a trunk network.
Innovation Solution
A network system with a terminal identification device that acquires and updates address information from a gateway device with an address conversion function, associating this information with IoT device identifiers to control connection availability to a trunk network, using a gateway device to convert and manage address information for each IoT device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal identification device identifies IoT devices by searching correspondence tables using header information of reception packets, then IoT devices connected directly to the local 5G network can be identified and their connection availability controlled, but IoT devices connected via mobile router cannot be identified because their transmission source IP address and port number are converted by the address conversion function
Solution Approach 1:
The patent introduces a gateway device as an intermediary between the mobile router and the terminal identification device. This gateway device performs address conversion and forwards packets while preserving original IoT device identification information. The terminal identification device can then identify IoT devices by searching correspondence tables using header information from packets that have been processed by the gateway device, enabling identification of both directly-connected and mobile-router-connected IoT devices.
Solution Approach 2:
The patent divides the network into distinct functional segments: the mobile router segment that performs address conversion, the gateway device segment that bridges address conversion and identification functions, and the terminal identification device segment that performs identification. This segmentation allows each component to perform its specialized function while maintaining overall system capability to identify all IoT devices regardless of connection method.
2Adaptability or versatility
If the transmission source IP address and port number are converted by the address conversion function of the mobile router, then multiple IoT devices can share a single public IP address, but the terminal identification device cannot recognize the original IoT devices to control their connection availability
Solution Approach 1:
The gateway device serves as an intermediary that receives packets from the mobile router after address conversion, performs reverse address conversion to restore original IoT device addresses, and forwards packets to the terminal identification device. This allows the system to maintain address sharing capability while restoring identification information necessary for connection availability control.
Solution Approach 2:
The gateway device dynamically changes address parameters by performing reverse address conversion on packets received from the mobile router. It transforms the converted IP address and port number back into the original IoT device address and port number, enabling the terminal identification device to use these parameters for identifying IoT devices and controlling their connection availability.
Data Source
AI summary
It is provided a network system that transfers data, the network system comprising: a first network; a second network connected with the first network and to which a server is connected; a third network connected with the first network and in which a terminal is accommodated; a terminal identification device, wherein the terminal identification device is configured to hold terminal identification information in which the address information of the gateway device in the first network, an identifier of the terminal, and the connection availability of the terminal to the second network are associated with each other, determine the connection availability of the terminal to the second network based on the terminal identification information, and acquire the address information of the gateway device in the first network and the identifier of the terminal from the gateway device to register or update the terminal identification information.