Smart Roam System Handoff Mechanism
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Solution Overview
Problem
Current wireless communication systems face challenges in seamless handoffs between access points, leading to limited range, unnecessary interference, and disruptions in data connectivity due to the lack of proactive management and coordination in 802.11 standards, which result in suboptimal signal quality and application response times.
Innovation Solution
A client-side handoff system that proactively monitors signal strength and quality, triggers disconnects from weaker access points, and initiates connections to stronger ones, using pre-authentication and periodic probe requests to minimize overhead and 'ping-pong' effects, allowing for smoother transitions and improved signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large number of access points are deployed to provide comprehensive coverage, then the coverage area is improved, but the device complexity and coordination management burden increase
Solution Approach 1:
The wireless device autonomously performs handoff decisions by monitoring signal strength from multiple access points and independently selecting the best AP to connect to, without requiring complex network-side coordination or control channels. This self-service approach eliminates the need for centralized handoff management while maintaining comprehensive coverage across multiple APs.
2Device complexity
If handoffs are managed independently by each device without network coordination, then the system complexity is reduced, but the handoff reliability and signal quality deteriorate
Solution Approach 1:
The system performs preliminary scanning of available access points and pre-evaluates signal strength before actual handoff is needed. By proactively identifying and assessing candidate APs in advance, the device ensures reliable handoff decisions are made based on current signal conditions, improving handoff reliability while maintaining independent device-side management.
3Speed
If the device actively scans for nearby access points continuously, then the handoff speed is improved, but the energy consumption and overhead increase
Solution Approach 1:
Instead of continuous scanning, the device performs periodic scans at intervals and triggers scans based on signal quality thresholds. This periodic action maintains adequate handoff speed by scanning only when necessary, while significantly reducing energy consumption compared to continuous monitoring of all available access points.
4Use of energy by moving object
If handoff is triggered only when signal quality degrades below threshold, then the energy overhead is reduced, but the connectivity reliability and application response time worsen
Solution Approach 1:
The system implements feedback mechanisms by continuously monitoring signal strength from the current access point and comparing it against threshold values. When signal quality feedback indicates degradation below the threshold, the device triggers a scan and handoff process, ensuring connectivity reliability is maintained while avoiding unnecessary scans when signal quality is acceptable, thus optimizing energy overhead.
Data Source
AI summary
Systems and methods for determining when to switch wireless access points from a current wireless access point to a new wireless access point are disclosed. In various embodiments the systems and methods monitor a signal strength received from the current wireless access point, monitor a signal strength received from the new wireless access point and compare the signal strength received from the wireless access points. Switching from the current wireless access point to the new wireless access point can occur, for example, when the signal strength received from the new wireless access point is greater than the signal strength received from the current wireless access point by a first pre-determined value.