WPAN-Assisted Roam Handoff to Cut Redundant WLAN Scanning
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Solution Overview
Problem
Redundant power consumption and network congestion occur when multiple wireless stations independently perform roam handoff procedures, as they simultaneously scan for and identify the best candidate AP, leading to unnecessary scans and probe transmissions.
Innovation Solution
Offload the roam handoff procedure by exchanging information over a WPAN link between wireless stations, where one station identifies and transmits the best candidate to another, thereby reducing redundant scanning and probe transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple wireless stations independently perform roam handoff procedures by scanning for candidate APs, then each station can maintain its own connection quality, but power consumption increases and network congestion occurs
Solution Approach 1:
The patent merges the roam handoff procedures of multiple wireless stations by having them share candidate AP identification results through a WPAN link. Instead of each station independently scanning and identifying candidate APs, they combine their efforts so that one station's identification work benefits all connected stations, reducing redundant scanning and power consumption while maintaining connection quality.
Solution Approach 2:
The patent introduces a WPAN link as an intermediary communication channel between wireless stations. This intermediary allows stations to exchange roam handoff information without directly impacting the WLAN connection, enabling collaborative decision-making about AP handoff while reducing individual station power consumption and network congestion.
2Measurement precision
If multiple wireless stations independently perform roam handoff procedures by transmitting probe transmissions, then each station can identify the best candidate AP, but network congestion occurs
Solution Approach 1:
The patent merges the candidate AP identification processes of multiple wireless stations by having them share results through a WPAN link. This combination reduces the number of redundant probe transmissions needed, as stations can leverage each other's identification work, thereby maintaining measurement precision while reducing network congestion.
Solution Approach 2:
The patent implements preliminary action by having wireless stations exchange roam trigger indications and candidate AP information in advance through the WPAN link before actual handoff is needed. This preliminary information sharing reduces the need for last-minute probe transmissions, maintaining accurate candidate identification while preventing network congestion during critical handoff moments.
3Productivity
If multiple wireless stations independently scan for candidate APs, then each station can ensure seamless data communication, but redundant scanning causes power consumption and network congestion
Solution Approach 1:
The patent merges the scanning efforts of multiple wireless stations by having them share candidate AP information through a WPAN link. This merging allows stations to maintain seamless data communication while avoiding redundant scanning operations, as each station can leverage the scanning results of others, thereby reducing power consumption without compromising communication continuity.
Solution Approach 2:
The patent implements feedback mechanisms where wireless stations exchange roam trigger indications and candidate AP information through the WPAN link. This feedback loop enables stations to adjust their scanning behavior based on others' findings, ensuring seamless data communication while minimizing redundant scanning and associated power consumption.
Data Source
AI summary
In some aspects, a wireless station may receive, over a wireless personal area network (WPAN) link, an indication of one or more roam triggers. The wireless station may transmit, over the WPAN link, an indication of a roam handoff candidate associated with the one or more roam triggers. Numerous other aspects are described.