Network Device Connection Detection Method
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Solution Overview
Problem
Network devices using the point to point protocol (PPP) frequently misinterpret network instability as disconnection due to lost LCP echo requests and replies, leading to unnecessary disruption of PPP connections.
Innovation Solution
A network device with a recording module, communication module, packet determination module, and determination module that sends detection packets and records data packets, determines connection state by counting response packets, setting a preset value to differentiate between connection and disconnection, and adjusts detection cycles to improve accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LCP echo requests are sent periodically to detect connection status, then connection detection capability is improved, but false disconnection determination occurs due to packet loss from network instability
Solution Approach 1:
The patent records the number of data packets received before the detection cycle begins (first packet number) and compares it with the number received after the detection cycle (second packet number). This preliminary recording of packet counts allows the system to distinguish between packets lost due to network instability and packets lost due to actual disconnection, preventing false disconnection determinations while maintaining accurate connection detection.
2Speed
If the number of lost LCP echo events threshold is set low, then disconnection detection speed is improved, but false disconnection alerts increase due to network instability
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors the number of data packets received during the detection cycle and compares it with the recorded packet number from before the detection cycle. This feedback loop allows the system to dynamically determine connection status based on actual packet reception changes, enabling fast detection while filtering out false alerts caused by network instability.
Data Source
AI summary
A network device records a number of data packets transmitted between a partner network device and the network device in a detection cycle. According to the number of detection packets without corresponding response packets number at the end the detection cycle, and the number of unchanged of data packets when the number of the detection packets without corresponding response packets is not less than the preset value, the network device determines a connection status of the partner network device.