Adaptive Network Discovery Method for Wireless Devices
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Solution Overview
Problem
In dense deployment scenarios, wireless devices face inefficiencies in network discovery due to high signaling overhead, particularly when transitioning between passive and active scanning methods, which can lead to prolonged detection times for legacy access nodes and additional overhead when detecting OCE-capable access nodes.
Innovation Solution
A method for selecting a network discovery method based on an initial channel assessment, where the device chooses between passive and active scanning depending on channel utilization, employing active scanning when the channel is underutilized and passive scanning when densely utilized, allowing for efficient detection of both OCE-capable and legacy access nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If active scanning is used to detect access nodes, then detection speed is improved, but signaling overhead increases
Solution Approach 1:
The patent applies dynamics by making the scanning method adaptive rather than static. The wireless device dynamically switches between active and passive scanning based on real-time channel conditions detected through initial channel assessment. When channel utilization is low, active scanning is selected for faster detection; when channel utilization is high, passive scanning is selected to reduce signaling overhead. This dynamic adaptation resolves the contradiction between detection speed and signaling overhead.
2Quantity of substance
If passive scanning is used to reduce signaling overhead, then detection time increases for legacy access nodes
Solution Approach 1:
The patent resolves this contradiction through dynamic method selection. Instead of always using passive scanning to minimize signaling overhead, the system assesses channel conditions first and then dynamically chooses the appropriate scanning method. When legacy access nodes are likely present (indicated by low channel utilization), active scanning is used to ensure timely detection despite higher overhead. This dynamic approach prevents the time loss that would result from consistently using passive scanning.
3Productivity
If channel assessment is performed before scanning, then scanning efficiency is improved, but additional time is required for assessment
Solution Approach 1:
The patent applies preliminary action by performing channel assessment before the actual network scanning process. The initial channel assessment evaluates channel utilization and detects transmissions from access nodes in advance, allowing the system to pre-determine the optimal scanning method. This preliminary step improves overall scanning efficiency by avoiding unnecessary transmissions during scanning, but does require additional time before the main scanning operation begins.
Data Source
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AI summary
This document discloses a solution for selecting a network discovery method in an apparatus. According to an aspect, the apparatus performs the following: performing initial channel assessment of a radio channel at maximum a determined time period shorter than or equal to the shortest of a plurality of discovery frame broadcast periodicities employed by access nodes the apparatus is configured to search for in network discovery; upon determining that a transmission has been detected in the initial channel assessment, selecting a network discovery according to a first network discovery method; and upon detecting no transmission on the radio channel during the initial channel assessment, selecting network discovery according to a second network discovery method different from the first network discovery method