WiFi Access System with Cloud Password Sorting and Hybrid Positioning
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Solution Overview
Problem
Users face difficulties in accessing multiple WiFi access points without remembering numerous passwords, and existing WiFi positioning systems suffer from poor performance due to signal interference and non-line-of-sight issues.
Innovation Solution
A WiFi access system comprising a mobile terminal with a WiFi client, mobile data communication network access module, and satellite positioning module, which communicates with a cloud server to acquire and sort available WiFi access points based on signal strength and location, allowing seamless connection to the most easily accessible points without manual password input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If users manually input passwords for each WiFi access point, then authentication can be completed, but user convenience deteriorates and operation complexity increases
Solution Approach 1:
The patent introduces a cloud server as an intermediary between users and WiFi access points. The server stores passwords and provides automatic authentication services, eliminating the need for users to manually manage multiple passwords. The system workflow shows the mobile terminal communicating with the cloud server, which handles password retrieval and transmission to access points, thus resolving the contradiction between ease of operation and system complexity.
Solution Approach 2:
The system enables automatic authentication where the mobile terminal automatically retrieves and uses passwords from the cloud server without user intervention. The terminal autonomously completes the authentication process by selecting appropriate access points and transmitting credentials, transforming a manual task into an automated self-service process that improves convenience.
2Reliability
If GPS satellite positioning is used, then global coverage is achieved, but positioning reliability deteriorates in urban canyons and indoor environments due to signal blockage
Solution Approach 1:
The patent combines multiple positioning methods into a hybrid system. It integrates GPS satellite positioning with WiFi-based positioning using fingerprint identification. The system first attempts GPS positioning for outdoor/global coverage, then switches to or supplements with WiFi positioning using pre-stored fingerprint data from access points. This merged approach ensures positioning reliability across both outdoor and indoor environments, overcoming the limitations of each individual method.
Solution Approach 2:
The system dynamically changes positioning parameters based on environmental conditions. When GPS signals are unavailable (indoor or urban canyon), the system transitions from satellite-based positioning to WiFi-based positioning by comparing current signal fingerprints against stored reference fingerprints. This parameter change enables continuous positioning functionality across different environments, improving overall reliability.
3Measurement precision
If WiFi-based positioning using triangle algorithm is used, then positioning can be implemented, but positioning precision deteriorates due to signal strength variations from antenna height, direction, and environment
Solution Approach 1:
The patent uses WiFi fingerprint copying where pre-measured signal characteristics (fingerprints) from access points are stored in a database. Instead of calculating position based on real-time signal strength triangulation, the system copies and compares fingerprint patterns from the database with current measurements. This copying approach eliminates the need for complex geometric calculations and reduces sensitivity to signal variations, thereby improving positioning precision.
Solution Approach 2:
The system performs preliminary action by pre-collecting and storing WiFi signal fingerprints from various locations before actual positioning is needed. These pre-stored fingerprints serve as reference data that enables rapid and accurate position determination through simple pattern matching, avoiding the need for complex real-time calculations and reducing the impact of environmental variations on precision.
Data Source
AI summary
The present invention discloses a WiFi access system, which collects a list of WiFi access points around a mobile terminal, and determines a final location of the mobile terminal based on a positioning information of each of the WiFi access points, positioning information of a base station, and satellite positioning information; a cloud server sends password information of each available WiFi access point to the mobile terminal according to sorting result of the list of WiFi access points based on degree of accessing difficulty of the mobile terminal and the final location information of the mobile terminal, in combination with an identification code, a password, and a geographic position of each of the WiFi access points locally stored, so that the mobile terminal can conveniently access the corresponding available WiFi access points.