Terminal Device Direct Communication via Authentication Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In data communication systems using SIP, when the IP address of a terminal device changes, subsequent communications without a connection management server can fail, preventing reliable data transfer between terminal devices.
Innovation Solution
A second terminal device is configured with a first command transmission unit, authentication information obtaining unit, storage control unit, second command transmission unit, and determination unit to store and verify the IP address and authentication information of the first terminal device, allowing direct communication without the connection management server if the terminal device is verified correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the second terminal device transmits commands directly to the first terminal device using a stored IP address without involvement of the connection management server, then processing load on the connection management server is reduced, but communication reliability deteriorates when the IP address changes
Solution Approach 1:
The patent applies preliminary action by performing authentication information verification before direct data communication. The second terminal device verifies authentication information with the first terminal device before transmitting commands directly, ensuring that even if the IP address changes, the communication remains reliable. This preliminary verification step prevents communication failures while still allowing direct communication to reduce server load.
Solution Approach 2:
The patent implements feedback by using authentication information exchange between terminal devices. The authentication mechanism provides a feedback loop that confirms the validity of the stored IP address and ensures the target device is still reachable, thereby maintaining communication reliability without requiring continuous involvement of the connection management server.
2Productivity
If the second terminal device stores the IP address obtained during first data communication for reuse, then communication efficiency is improved for subsequent communications, but communication failure risk increases when the IP address changes
Solution Approach 1:
The patent applies preliminary action by verifying authentication information before using the stored IP address for direct communication. This ensures that the stored IP address is still valid and points to the correct device, maintaining communication efficiency while preventing failures due to IP address changes.
Solution Approach 2:
The patent implements dynamics by making the direct communication path conditional rather than static. The system dynamically determines whether to use the stored IP address for direct communication based on authentication verification results, allowing flexibility to switch between direct and server-mediated communication as needed.
Data Source
AI summary
A second terminal device is used in a system including a server, a first terminal device, and the second terminal device. The second terminal device includes: a first command transmission unit configured to transmit a first command to the first terminal device via the server; a storage control unit configured to hold a first address and first authentication information of the first terminal device; a second command transmission unit configured to transmit a second command to the first address; a determination unit configured to determine whether a terminal device as a destination of the second command is the first terminal device, by using first response data from the terminal device and the first authentication information; and a third command transmission unit configured to transmit a third command to the first address if the terminal device is determined to be the first terminal device.