Network Jitter Source Pinpointing via Intermediate Device Latency Reporting
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Solution Overview
Problem
In network flows spanning wide geographies, identifying and correcting jitter sources becomes challenging due to the numerous intervening devices that can introduce jitter, making it difficult for administrators to isolate and address the issue.
Innovation Solution
Intermediate devices in the network path determine baseline latency and characterize jitter by processing packet latency information, storing it in hardware tables, and reporting jitter indications to administrators, allowing central devices to pinpoint the source of jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network flows span wide geographies through many intervening devices, then the network coverage and connectivity are improved, but the difficulty of isolating jitter sources increases
Solution Approach 1:
The patent segments the network path into multiple hops, with each intermediate device independently measuring and reporting latency for packets passing through it. This segmentation allows the central device to attribute jitter to specific hops by comparing latency measurements across different devices, thereby resolving the contradiction between wide network coverage and difficulty of jitter source isolation.
Solution Approach 2:
The patent introduces intermediate devices as mediators that automatically measure and report latency information. These intermediaries collect timing data from packets and forward it to a central device, which then analyzes the data to identify jitter sources. This intermediary approach enables precise jitter source isolation across wide geographies without requiring direct administrator intervention at each location.
2Measurement precision
If multiple tests are performed by network administrators to isolate jitter sources, then the accuracy of jitter source identification is improved, but the time and complexity of analysis increases
Solution Approach 1:
The patent implements preliminary action by having intermediate devices continuously measure and store latency information for packets in hardware tables before the central device needs to analyze jitter. This pre-collection of timing data eliminates the need for administrators to perform multiple manual tests, as all necessary measurement data is already prepared and stored, significantly reducing analysis time while maintaining high precision.
Solution Approach 2:
The patent establishes a feedback mechanism where intermediate devices automatically report latency measurements to the central device, which then provides feedback about jitter conditions and identifies affected hops. This automated feedback loop continuously monitors network conditions and enables rapid jitter source identification without requiring repeated manual testing, thus reducing both time and complexity.
Data Source
AI summary
This disclosure describes methods to process timing information of flows in a network. One or more processors determine a latency associated with each of one or more packets of a flow passing through a device. The one or more processors determine that the latency is greater than a baseline latency, and the one or more processors provide a message indicating at least the flow and that the latency is greater than the baseline latency.


