Wireless Reconnection via DHCP Continuity

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Solution Overview

Problem

Conventional wireless communication apparatuses struggle to automatically reconnect and resume communication after changes in network layer connection information, requiring users with expertise to manually reset settings, especially when IP address or subnet mask changes occur.

Innovation Solution

A wireless communication apparatus with a detection unit to identify disconnections and a reconnection unit that uses previously acquired network layer connection information to automatically reconnect and update settings, enabling seamless communication even after changes in access point-provided address information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If automatic reconnection is implemented at layer 2 only, then reconnection speed is improved, but network layer communication reliability deteriorates when IP address changes occur

Engineering Contradiction:

Improvereconnection speedVSAvoidnetwork layer communication reliability

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent implements continuous DHCP request transmission after layer 2 reconnection to maintain network layer connectivity. The DHCP client continuously requests IP address information even after wireless connection is reestablished, ensuring that network layer communication parameters are updated and maintained without interruption, thus resolving the contradiction between fast reconnection and communication reliability.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The system implements feedback by monitoring DHCP response status and automatically adjusting reconnection behavior. When DHCP address allocation fails or IP address changes are detected, the system triggers another reconnection attempt, creating a closed-loop control that ensures network layer reliability while maintaining layer 2 connection speed.

Inventive Principle:

Principle #23Feedback

2Reliability

If manual initialization of network layer settings is required, then network layer communication reliability is maintained, but ease of operation deteriorates

Engineering Contradiction:

Improvenetwork layer communication reliabilityVSAvoidease of reconnection operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent implements self-service by automating the entire network layer reconfiguration process. The DHCP client automatically requests and obtains IP address information from the access point after layer 2 reconnection, and the system autonomously applies the obtained network parameters without requiring any user intervention, thus maintaining reliability while dramatically improving ease of operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs preliminary DHCP address acquisition attempts before finalizing the reconnection process. By proactively requesting IP address information immediately after layer 2 connection is reestablished, the system ensures network layer readiness is prepared in advance, preventing communication failures before they occur.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If DHCP address allocation is performed after reconnection, then adaptability to network changes is improved, but processing time increases

Engineering Contradiction:

Improveadaptability to IP address changesVSAvoidreconnection processing time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent implements periodic DHCP request transmission at optimized intervals after reconnection. Instead of continuous transmission that would waste time, the system sends DHCP requests at predetermined periodic intervals, balancing the need to obtain updated IP address information with the goal of minimizing reconnection processing time. This periodic approach ensures adaptability to network changes while controlling time loss.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS9661677B2Wireless communication apparatus, wireless communication method, and computer-readable storage medium

Publication Date: 2017.05.23 RICOH CO LTD

AI summary

A wireless communication apparatus is for communicating with an access point through a first communication and communicating with another communication apparatus through a second communication via a network including an access point. The wireless communication apparatus includes a detection unit configured to detect a status of the first communication; and a reconnection unit configured to reconnect the first communication and then reconnect the second communication by using connection information of a corresponding network layer of the wireless communication apparatus acquired through the first communication when disconnection of the first communication is detected by the detection unit.