Time-Window Signaling in Network Transmission for CQF Fault Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Downstream devices in a network cannot accurately detect time window exceptions in upstream devices, leading to forwarding errors and service interruptions when upstream devices experience faults or sudden changes in time windows.
Innovation Solution
Network devices send a preset identification packet carrying a window value during time window switching moments when no user packets are present, allowing downstream devices to determine and adjust to the new time windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If asynchronous CQF technology is adopted to enable downstream devices to acquire time window values from packets, then downstream devices can learn about switching moments of upstream device time windows, but when there are few packets or no packets sent by the upstream device, the downstream device cannot accurately determine the time window switching moment
Solution Approach 1:
The upstream device sends identification packets in advance at predetermined time window switching moments, even when no user packets need to be transmitted. This preliminary action ensures that downstream devices can accurately detect the switching moments without relying on user packets, thereby resolving the contradiction between detection accuracy and packet volume.
2Reliability
If the upstream device does not send packets during normal operation, then network traffic is reduced, but when a fault exception occurs causing sudden time window changes, the downstream device cannot detect the exception and continues forwarding packets according to the previous time window, leading to forwarding errors
Solution Approach 1:
The upstream device sends identification packets periodically at each time window switching moment. This periodic action creates a reliable detection mechanism that allows downstream devices to continuously monitor for time window changes and detect faults, while consuming minimal network resources since identification packets are small and sent only at switching moments.
3Reliability
If identification packets are sent at every time window switching moment, then downstream devices can accurately detect time window changes and improve reliability, but network device complexity increases due to the need to manage identification packet generation and processing
Solution Approach 1:
The identification packets use simplified formats that copy only the essential time window value information from user packets, rather than transmitting complete packet data. This copying approach maintains detection reliability while reducing the complexity of packet generation, processing, and management at both upstream and downstream devices.
Data Source
AI summary
A data transmission method and apparatus, a network device, and a storage medium are provided. In the method, a first network device determines whether there is a packet to be sent at a switching moment of a current time window; and the first network device sends a preset identification packet to a second network device in a case where there is no packet to be sent at the switching moment of the current time window, wherein the preset identification packet carries a window value of the current time window, and the window value is used for enabling the second network device to determine switching moments of different time windows of the first network device.