Wireless Scanning Method for VoIP Latency Reduction
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Solution Overview
Problem
Current IEEE 802.11 wireless scanning methods, such as active and passive scanning, result in lost bandwidth due to the need for clients to dwell on each channel for extended periods, which is inefficient, especially for time-sensitive data like VoIP, as they cannot transmit data during scanning intervals.
Innovation Solution
Implementing a scanning method that suspends data scanning operations during discrete intervals to allow for data transmission, particularly for time-sensitive data, thereby minimizing latency and optimizing bandwidth usage by dividing the scanning sequence into shorter intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clients dwell on each channel for extended periods to perform scanning operations, then scanning completeness is improved, but bandwidth efficiency deteriorates and transmission delays increase
Solution Approach 1:
The patent segments the scanning operation into discrete intervals within a scanning sequence. Instead of dwelling on each channel for extended continuous periods, the scanning process is divided into multiple shorter intervals, allowing data transmission to occur in between scanning intervals. This segmentation resolves the contradiction by maintaining scanning completeness through multiple measurement points while improving bandwidth efficiency by enabling transmission during non-scanning periods.
Solution Approach 2:
The patent implements periodic scanning sequences with regular intervals between scanning operations. The client performs scanning at periodic intervals rather than continuously, allowing data transmission to occur during the periodic gaps. This periodic action maintains reliable channel assessment through regular scanning while significantly improving bandwidth efficiency and reducing transmission delays for time-sensitive data.
2Adaptability or versatility
If clients perform scanning operations on all channels, then network discovery capability is improved, but transmission latency for time-sensitive data worsens
Solution Approach 1:
The patent segments the channel scanning process into discrete intervals distributed across multiple scanning sequences. Instead of performing complete channel scans before transmitting time-sensitive data, the scanning is divided into intervals that occur periodically. This allows time-sensitive data to be transmitted during non-scanning intervals while still maintaining network discovery capability through the segmented scanning measurements.
Solution Approach 2:
The patent performs preliminary scanning actions at the beginning of scanning sequences to establish channel conditions in advance. By performing initial scanning measurements before potential data transmission windows, the system prepares network discovery information ahead of time, reducing the need for extensive scanning before each transmission and thereby reducing transmission latency for time-sensitive data.
3Reliability
If single radio clients use scanning mechanisms to find APs, then network connectivity is improved, but available bandwidth for data transfer deteriorates
Solution Approach 1:
The patent implements periodic scanning sequences where the single radio client performs channel scanning at regular intervals rather than continuously. During the periodic gaps between scanning sequences, the radio is available for data transmission. This maintains network connectivity through regular beacon reception and AP discovery while significantly increasing available bandwidth for actual data transfer operations.
Solution Approach 2:
The patent segments the radio's time into scanning intervals and transmission intervals within each scanning sequence. By dividing the operational timeline into discrete segments dedicated to different functions (scanning vs. data transfer), the system maintains reliable network connectivity through periodic scanning while maximizing available bandwidth during the transmission-dedicated segments.
Data Source
AI summary
A scanning method, computer readable medium, and device for suspending, during a first data scanning sequence including a plurality of discrete data scanning intervals, data scanning operations during at least one discrete data scanning interval chosen from the plurality of discrete data scanning intervals. A data transmission operation is performed during the at least one discrete data scanning interval.