CSG Cell Detection via WLAN Fingerprint Triggering
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Solution Overview
Problem
In mobile environments, identifying and detecting Closed Subscriber Group (CSG) cells efficiently is challenging, leading to excessive power consumption and potential failure to connect to preferred CSG cells due to inconsistent fingerprint measurements and complex algorithms.
Innovation Solution
The proposed solution integrates a WLAN search algorithm with an autonomous search function (ASF) in communication devices, leveraging mature and power-efficient WLAN search algorithms to trigger CSG cell searches based on fingerprint information, reducing unnecessary scans and improving connection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional fingerprinting methods are used to identify CSG cells, then measurement precision may be maintained, but power consumption increases and detection reliability decreases
Solution Approach 1:
The patent introduces WLAN access point detection as an intermediary mechanism to trigger CSG cell searches. Instead of continuously scanning for CSG cells or relying on inconsistent fingerprint measurements, the system uses WLAN AP detection (which has better power efficiency and consistency) as a mediator to initiate targeted CSG searches only when a matching WLAN AP is detected, thereby reducing power consumption while maintaining or improving detection reliability
Solution Approach 2:
The system performs preliminary WLAN fingerprinting and stores WLAN AP information in advance. When a WLAN AP is detected, the system has already prepared the corresponding CSG cell search parameters and criteria, allowing for immediate and efficient CSG cell detection without requiring extensive real-time scanning or complex algorithms during the actual CSG search phase
2Reliability
If continuous scanning for CSG cells is performed, then detection coverage is improved, but power consumption increases excessively
Solution Approach 1:
The system implements periodic CSG cell searches triggered by WLAN AP detection events rather than continuous scanning. The search operation is performed periodically only when a WLAN AP matching stored fingerprint information is detected, converting continuous high-power scanning into event-driven periodic searches that maintain detection coverage while significantly reducing overall power consumption
Solution Approach 2:
The system uses the device's existing WLAN scanning capability to serve dual purposes: both for WLAN connectivity and as a trigger mechanism for CSG cell searches. The WLAN scan results self-service the CSG detection need by providing the trigger condition, eliminating the requirement for separate continuous CSG scanning operations
3Measurement precision
If complex algorithms are used for CSG cell detection, then measurement precision may be maintained, but device complexity increases
Solution Approach 1:
The patent extracts the complex fingerprint matching and decision-making logic from the CSG cell detection process and relocates it to the WLAN scanning and triggering phase. The system stores pre-configured WLAN AP fingerprint information and simple matching criteria, performing only simple comparison operations during WLAN scans, thereby reducing the algorithmic complexity required during actual CSG cell detection while maintaining measurement precision through the pre-established WLAN-CSG association
Data Source
AI summary
Various configurations and arrangements of various systems and methods for identifying, detecting and obtaining service on closed subscriber group systems are disclosed. A method in accordance with the disclosure includes receiving first information from a first AP that supports a first wireless technology. The first information is indicative of the first AP. The method further includes determining if the first information matches second information stored in a memory in association with third information stored in the memory. The third information is indicative of a second AP that supports a second wireless technology. The method further includes, upon determining, that the first information matches the second information, attempting to establish a connection with the second AP based on the third information.