Packet Disruption Measurement via Snapshot Exchange
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Solution Overview
Problem
Conventional packet monitoring systems provide only tens of seconds accuracy for service restoration times, which is insufficient for precise SLA tracking and higher layer restoration initiation in optical networks.
Innovation Solution
Implementing a system where network nodes capture and exchange snapshots of packet transmission and reception data with timestamps at the onset and clearance of faults, allowing for precise calculation of packet disruption information through a control plane, enabling millisecond accuracy in packet loss and disruption duration measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional PM data is used for monitoring, then the system complexity is low, but the measurement precision of restoration time is only tens of seconds accuracy
Solution Approach 1:
The system captures packet counter snapshots at predetermined trigger events (fault detection and fault clearance) before performing analysis. This preliminary capture of data at critical moments enables precise restoration time measurement without requiring continuous complex monitoring, as the snapshots are taken in advance at the exact moments needed for calculation.
Solution Approach 2:
The patent introduces an intermediary mechanism using packet counter snapshots and timestamps as intermediate data structures. These snapshots serve as mediators between the raw network traffic and the final restoration time calculation, allowing precise measurement by comparing intermediate states at fault boundaries without requiring direct complex continuous monitoring of the entire service stream.
2Loss of information
If conventional PM data with 15 minute/24 hour logging is used, then the ease of operation is high, but the loss of information occurs for precise packet disruption data
Solution Approach 1:
The system performs preliminary capture of packet counter snapshots at fault detection and fault clearance events. This ensures that critical disruption information is captured at the exact moments it occurs, preventing information loss that would occur with periodic logging. The snapshots are taken in advance at the boundaries of disruptions, preserving all necessary data for accurate calculation.
Solution Approach 2:
The system uses feedback from fault detection mechanisms (such as LOS, AIS, BDI signals) to trigger snapshot capture. When a fault condition is detected, the system receives feedback and automatically captures the relevant packet counter data, ensuring that disruption information is preserved without requiring manual configuration or continuous monitoring operations.
3Measurement precision
If snapshots are captured at fault detection and clearance events, then the measurement precision improves to millisecond accuracy, but the device complexity increases due to additional control plane functionality
Solution Approach 1:
The control plane is configured in advance to capture packet counter snapshots at specific trigger events (fault detection and clearance). This preliminary configuration allows the system to automatically capture precise measurement data at the right moments without requiring complex real-time processing or continuous monitoring logic during the actual disruption events.
Solution Approach 2:
The patent uses packet counter snapshots as intermediary data structures that simplify the control plane's workload. Instead of requiring the control plane to continuously analyze complex traffic patterns, it simply captures and stores snapshot data at trigger events, then uses these intermediaries for precise calculation of packet loss and disruption duration.
Data Source
AI summary
Systems and methods with a service operating in a network between an originating node and a terminating node include, responsive to detection of a fault on a service, determining a first snapshot of information at each of the originating node and the terminating node; responsive to detection of clearing of the fault, determining a second snapshot of information at each of the originating node and the terminating node; and utilizing the first snapshot of information at each of the originating node and the terminating node and the second snapshot of information at each of the originating node and the terminating node to determine packet disruption information for the service based on the fault and the clearing of the fault.