WLAN Diagnostics via Localized Traffic Stream Metrics
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Solution Overview
Problem
Current diagnostic and management systems for wireless LANs (WLANs) fail to effectively address network performance issues related to user mobility and RF environments, particularly in VoIP over WLAN systems, as they do not provide adequate visibility into quality of service (QoS) issues caused by interference and misconfiguration, and often rely on end-to-end measurements that do not account for single link performance.
Innovation Solution
The system collects and analyzes localized uplink and downlink traffic stream metrics, including latency, queuing delay, packet loss, and roaming information, at wireless clients and access points, which are then aggregated and reported to a network management module for diagnostics. This module uses fault tree analysis to identify and remediate QoS issues, enabling corrective actions such as reconfiguring the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If end-to-end measurements are used to assess network performance, then overall network performance can be evaluated, but information concerning single link performance is not provided
Solution Approach 1:
The patent segments the end-to-end measurement into individual link measurements. Each wireless access point and network element collects performance metrics for its specific link segment, including latency, packet loss, and throughput. This segmentation enables precise identification of which specific link is causing performance issues, rather than only knowing the overall end-to-end performance.
2Adaptability or versatility
If network monitoring focuses on wired WANs and LANs, then wired network performance can be assessed, but user mobility and RF environment factors are not accounted for
Solution Approach 1:
The patent creates a universal monitoring system that handles both wired and wireless network segments. The network monitoring module collects performance data from multiple sources including wireless access points, wired network infrastructure, and end devices, unifying the monitoring approach across different network types and enabling comprehensive QoS assessment that accounts for both wired and wireless characteristics.
Solution Approach 2:
The system implements continuous feedback loops where performance metrics are collected from wireless access points and network elements, analyzed by the monitoring module, and used to generate reports and alerts. This feedback mechanism enables real-time detection of QoS issues related to user mobility and RF conditions, allowing dynamic adaptation to changing network conditions.
3Reliability
If diagnostic systems do not address roaming-related network performance issues, then system simplicity is maintained, but roaming QoS problems cannot be identified
Solution Approach 1:
The patent implements preliminary monitoring and tracking of user devices as they move through different wireless access point coverage areas. The system proactively collects performance metrics before roaming issues occur, tracking latency, packet loss, and connection stability across multiple access points. This preliminary action enables the system to identify patterns and predict potential roaming QoS problems before they impact user experience.
Data Source
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AI summary
Methods, apparatuses and systems directed to facilitating WLAM diagnostics and management using traffic stream metrics, In a data collection stage, according to one implementation of the present invention, localized uplink measurements are taken, at a wireless client associated with a wireless access point. During periodic intervals (e.g., every 5 seconds), the wireless client, in one implementation, transmits uplink measurement information, to the wi.rel.ess access point. The wireless access point may also take downlink measurements, which may also include one or more of the following metrics- observed latency, queuing delay, packet loss rate, and packet count information. The wireless access point, in one implementation, may aggregate and report the uplink and downlink metric information to a network management system. In a diagnostic stage, according to one implementation, a wireless network management module performs diagnostics of the WLAN based on the uplink and/or downlink metrics received from the wireless access point.