Wireless Access Point RF Coverage Boundary Adjustment
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Solution Overview
Problem
Existing wireless access points (APs) in WLANs lack effective configuration methods to ensure reliable and timely handoffs between WLAN and WWAN, leading to potential disruptions in voice communication sessions when mobile devices move out of WLAN coverage.
Innovation Solution
The implementation of an adaptive beamforming technique, specifically minimax optimization, is used to configure wireless APs as 'tripwires' by adjusting RF coverage boundaries based on received signals from communication devices positioned within and outside the desired coverage area, maximizing coverage for devices within the desired region and minimizing it for those outside, thereby optimizing handoff indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless access points use standard RF coverage configuration, then network coverage is provided, but handoff reliability and timeliness are insufficient
Solution Approach 1:
The access point automatically performs beamforming configuration by receiving RF signals from communication devices and autonomously adjusting transceiver parameters to optimize coverage boundaries, eliminating the need for manual configuration while ensuring reliable handoffs
Solution Approach 2:
The system dynamically adjusts transceiver parameters including beamforming weights and phase shifts based on received RF signal characteristics to optimize the RF coverage region boundaries for handoff detection accuracy
2Loss of time
If access point coverage region is expanded to detect devices earlier, then handoff timeliness improves, but false detection increases
Solution Approach 1:
The access point creates a localized optimized RF coverage region with enhanced beamforming focus at the boundary area where handoffs occur, providing early detection capability precisely where needed without causing false detections in other areas
Solution Approach 2:
The system uses feedback from received RF signals to continuously adjust transceiver parameters and coverage boundaries, allowing the access point to learn from actual device positions and signal characteristics to improve detection accuracy over time
3Manufacturing precision
If manual coverage configuration is used, then coverage boundaries can be set, but configuration complexity and time consumption increase
Solution Approach 1:
The access point performs self-configuration by automatically receiving RF signals from communication devices and autonomously adjusting transceiver parameters to optimize coverage boundaries, eliminating the need for manual configuration while achieving precise coverage control
Solution Approach 2:
The system replaces manual mechanical configuration processes with automated electronic signal-based configuration, where the access point uses received RF signals to automatically adjust its transceiver parameters and establish optimal coverage regions
Data Source
AI summary
A mobile communication device includes a processor and a communication subsystem coupled to the processor. The communication subsystem is configured to provide the mobile device with wireless communications via an access point of a wireless network. The mobile device communicates with the access point via the communication subsystem for adjusting boundaries of an RF coverage region of the access point. The mobile device subsequently communicates with the access point via the communication subsystem in the adjusted RF coverage region for handoff to another wireless network, while the access point serves as part of a handoff indication mechanism in the wireless network.