Network Connection Method for Image Forming Devices
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Solution Overview
Problem
When multiple routers are cascaded and DHCP service is enabled, image forming devices and terminals often fail to communicate normally due to IP addresses being assigned to different network segments.
Innovation Solution
A method and device for network connection that allows an image forming device to obtain an IP address in the same network segment as a terminal by establishing connections with routers, sending address request instructions, and filtering IP addresses based on network segment filtering information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple routers are cascaded with DHCP service enabled to expand network coverage and enhance wireless signals, then network coverage and signal strength are improved, but IP address assignment causes image forming devices and terminals to be assigned to different network segments, preventing normal communication
Solution Approach 1:
The patent introduces network segment filtering information as an intermediary mechanism. The terminal obtains this information from the target router and uses it to filter IP address assignment requests. This intermediary filtering mechanism ensures that only IP addresses from the correct network segment are assigned to the image forming device, enabling communication across multiple routers without requiring additional configuration on the image forming device side.
Solution Approach 2:
The patent changes the parameter of IP address assignment by introducing network segment filtering information as a new constraint parameter. Instead of simply assigning any available IP address from DHCP, the system now filters and selects IP addresses based on the network segment information obtained from the terminal, ensuring that the assigned IP address belongs to the same network segment as the terminal for proper communication.
2Ease of operation
If DHCP service is enabled on multiple cascaded routers to provide automatic IP address assignment, then ease of connection is improved, but network segment isolation occurs causing communication failures between image forming devices and terminals
Solution Approach 1:
The patent implements a feedback mechanism where the terminal provides network segment filtering information back to the image forming device during the IP address assignment process. The image forming device uses this feedback information to filter and select appropriate IP addresses, ensuring that the assigned IP address is compatible with the terminal's network segment, thereby maintaining communication reliability while preserving automatic connection functionality.
3Speed
If the image forming device automatically obtains IP address from multiple routers without filtering, then connection speed is improved, but network segment mismatch occurs preventing communication with terminal
Solution Approach 1:
The patent applies preliminary action by having the terminal obtain network segment filtering information from the target router before the image forming device completes its IP address assignment. This preliminary acquisition of filtering information allows the image forming device to pre-filter IP address options and select an appropriate IP address from the correct network segment, ensuring communication reliability without significantly delaying the connection process.
Data Source
AI summary
A network connection method includes: obtaining network configuration information including at least one information item that includes a name or a password of a target router; establishing a connection with a terminal; receiving network segment filtering information sent by the terminal, the network segment filtering information being obtained after the terminal establishes a connection with a target router in response to the terminal selecting any one of the at least two routers included in the local area network as the target router; establishing a connection with the target router according to the network configuration information; and sending an address request instruction to the at least two routers included in the local area network, and obtaining an Internet Protocol (IP) address in a network segment same as the terminal as a target IP address based on the network segment filtering information, to communicate with the terminal through the target IP address.