Conversion Device IP Address Assignment Without DHCP
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Solution Overview
Problem
Existing conversion devices require excessive communication and processing time to set IP addresses, especially when a DHCP server is unavailable, as they need to determine if a temporary IP address is already in use by other terminals.
Innovation Solution
A conversion device that uses the MAC address of a connected terminal as an identifier to set its IP address, allowing the controller to manage and assign IP addresses efficiently, even without a pre-assigned IP address, and includes a system for determining temporary or permanent IP address usage to optimize firmware and setting updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conversion device determines whether a temporary IP address is already in use through communication, then the IP address assignment can be performed without a DHCP server, but the amount of processing and processing time increases
Solution Approach 1:
The controller pre-manages and reserves IP addresses for conversion devices before they need to be assigned. When a conversion device connects, the controller already has the IP address ready to assign, eliminating the need for the conversion device to perform communication checks to determine if the address is in use. This preliminary preparation of IP addresses resolves the contradiction by enabling DHCP-serverless operation while avoiding the time-consuming address availability checking process.
2Extent of automation
If the conversion device performs IP address determination through communication, then automatic IP address setting is achieved, but the amount of processing increases
Solution Approach 1:
The controller acts as an intermediary that centralizes the IP address management function. Instead of each conversion device independently performing complex communication and determination processes to set its own IP address, the controller manages the IP addresses and assigns them to conversion devices. This intermediary approach maintains automatic IP address setting while significantly reducing the processing complexity at the conversion device level.
Data Source
AI summary
A conversion device for interconversion of wired communication and wireless communication includes a wired IF, a wireless IF, a converter that retains a first MAC address of a communication terminal connected to the wired IF and uses the first MAC address to convert wired communication in which the communication terminal is a destination into wireless communication and convert wireless communication in which the communication terminal is a source into wired communication between the wired IF and the wireless IF, and a controller that receives a communication packet including an IP address and a second MAC address through the wireless IF, and when the second MAC address included in the received communication packet is the same as the first MAC address, sets the IP address included in the received communication packet as an IP address of the conversion device.