Directional WiFi Scanner With Geotagged Packet Mapping
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Solution Overview
Problem
Existing technologies for wireless communications lack efficient methods for packet collection and positioning information in WiFi scanning, particularly for handheld devices, to improve the accuracy and efficiency of wireless communications.
Innovation Solution
A handheld device with a directional antenna and a positioning system to determine the location and heading orientation of the packet collection, utilizing a GPS receiver and a magnetic compass to determine the GPS antenna and a directional antenna to collect packets from access points, and a system-on-module to generate WiFi scan data with geolocation metadata.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If omnidirectional antennas are used for WiFi scanning, then the device can detect packets from all directions, but the signal gain and scanning accuracy in a specific direction is reduced
Solution Approach 1:
The patent divides the scanning function into multiple directional segments by using multiple directional antennas oriented in different directions. Each antenna is optimized for a specific directional sector, allowing the system to achieve high signal gain in each sector while maintaining comprehensive coverage through the collective action of all antennas.
Solution Approach 2:
Each directional antenna is designed with specific local quality characteristics optimized for its designated direction. The antennas have directional radiation patterns that concentrate signal gain in their primary scanning direction while minimizing interference in other directions, creating locally optimized performance for each spatial sector.
2Measurement precision
If multiple directional antennas are added to improve scanning accuracy, then the signal gain in the pointing direction increases, but the device complexity increases
Solution Approach 1:
Multiple directional antennas are merged into a unified antenna array system with a common housing structure. The antennas are arranged in a coordinated configuration and controlled by a single WiFi chipset module, allowing the system to achieve the performance of multiple independent antennas while managing complexity through integration and shared control architecture.
Solution Approach 2:
The directional antenna system is designed to serve multiple functions: packet collection, signal strength measurement, and directional scanning. The same antenna array used for high-accuracy packet collection also provides the structural framework for the handheld device, reducing overall system complexity by eliminating the need for separate dedicated components.
3Measurement precision
If positioning system components (GPS receiver, magnetic compass) are integrated into the handheld device, then the location and orientation data accuracy improves, but the device weight increases
Solution Approach 1:
The positioning system components are nested within the existing handheld device structure. The GPS receiver and magnetic compass are integrated into the housing that already contains the directional antennas and WiFi chipset, creating a compact multi-functional unit. This nesting approach allows the positioning components to share the same structural envelope as other device components, minimizing additional weight.
Solution Approach 2:
The positioning system components are designed to operate autonomously and provide location and orientation data directly to the WiFi scanning function without requiring external support systems. The GPS receiver and magnetic compass self-calibrate and provide accurate geolocation data that enables precise packet collection and mapping, eliminating the need for additional external positioning infrastructure.
Data Source
AI summary
A WiFi scanning apparatus can comprise a housing defining a pointing direction for collecting WiFi or Bluetooth packets. A directional antenna disposed within the housing can provide directionality for increased gain in the pointing direction along a longitudinal axis of the housing. A WiFi chipset module coupled to the directional antenna can be configured to obtain a plurality of collected packets from one or more access points (APs) in the pointing direction, using the directional antenna. A positioning system can be configured to determine a location and a heading orientation of the apparatus corresponding to a time of collection for each collected packet of the plurality of collected packets. A system-on-module (SOM) can generate WiFi scan data comprising the plurality of collected packets and a respective geolocation metadata indicative of the location and the heading orientation determined for each collected packet of the plurality of collected packets.