Wireless Device Scanning Synchronization with Voice Silence
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Solution Overview
Problem
Seamless roaming in 802.11 networks often results in degradation of voice quality due to scanning processes during voice over internet protocol (VoIP) sessions, causing gaps or delays in voice transmission.
Innovation Solution
A method and system that synchronize scanning with periods of voice silence in a mobile unit, deferring scans when audio is present and performing them during detected silence to mitigate voice audio degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scanning is performed continuously to maintain network connectivity and enable roaming, then network adaptability and roaming capability are improved, but voice quality and transmission continuity deteriorate due to gaps and delays
Solution Approach 1:
The patent implements periodic scanning instead of continuous scanning by scheduling scans during voice silence periods. The scan control component detects voice activity and defers scanning operations until silence is detected, creating a periodic scanning pattern that adapts to voice traffic conditions. This resolves the contradiction by maintaining roaming capability through regular scanning while eliminating voice quality degradation by scanning only during appropriate intervals.
2Reliability
If scanning is deferred during voice transmission to maintain voice quality, then voice quality is improved, but network roaming responsiveness and connectivity maintenance worsen
Solution Approach 1:
The patent employs feedback mechanisms where the scan control component continuously monitors voice activity detection (VAD) status and dynamically adjusts scanning timing based on this feedback. When voice silence is detected, the system immediately schedules scanning operations, ensuring rapid response to roaming opportunities. This feedback-driven approach maintains voice quality by deferring scans during transmission while preserving roaming responsiveness by quickly initiating scans when conditions permit.
3Reliability
If scanning operations are performed frequently to ensure network coverage and handover readiness, then network reliability and handover capability are improved, but voice transmission continuity and audio quality worsen
Solution Approach 1:
The patent implements dynamic scanning behavior that adapts to real-time voice transmission conditions. The scan control component modifies scanning frequency and timing based on detected voice activity, performing scans during silence periods and deferring them during active transmission. This dynamic approach ensures handover capability is maintained through regular scanning while preserving voice transmission continuity by avoiding scans during critical audio periods.
Data Source
AI summary
A system and method are disclosed to achieve improvements in scanning that can be implemented by a wireless device. A method to control scanning performed by a mobile unit includes detecting the presence or absence of audio for transmission from the mobile unit. A performance of a scan can be deferred depending on the detection of the presence or absence of audio.