WLAN STA Measurement Time Gaps for Assisted Neighbor AP Scanning
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Solution Overview
Problem
Conventional WLAN radio measurement frameworks lack standard-defined long-term assisted measurement frameworks, leading to inefficiencies in neighbor AP evaluations, inconsistent inter-frequency scanning, and unnecessary power consumption due to redundant beacon transmissions.
Innovation Solution
Implementing a system and method for performing measurement operations at a station (STA) device in a WLAN, including transmitting capability information for time gap support, receiving a time gap configuration, and performing measurements based on this configuration, which includes intra-frequency, inter-frequency, out-of-band beacon and pilot, and cross-technology measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional WLAN radio measurement frameworks are used, then basic measurement capabilities are provided, but long-term assisted measurement frameworks are lacking leading to inefficiencies in neighbor AP evaluations
Solution Approach 1:
The patent implements long-term assisted measurement frameworks where the access point performs measurements in advance before handover decisions are needed. The access point continuously monitors radio conditions and pre-evaluates neighbor APs, storing measurement results for later use in handover decisions, thereby eliminating the need for reactive measurements at the time of handover requirement.
Solution Approach 2:
The patent introduces an intermediary measurement framework where the access point acts as a mediator between the station and the radio environment. The access point performs assisted measurements on behalf of the station, processing radio condition data and neighbor AP information, and providing processed results that guide handover decisions without requiring the station to perform all measurements independently.
2Measurement precision
If redundant beacon transmissions are performed, then measurement coverage is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by having the access point transmit beacons only at specific intervals and only when measurement assistance is needed, rather than continuous transmissions. The system determines appropriate beacon transmission timing based on mobility conditions and handover requirements, reducing unnecessary transmissions while maintaining sufficient measurement coverage for accurate neighbor AP evaluation.
Solution Approach 2:
The patent implements self-service mechanisms where the access point autonomously determines when beacon transmissions are necessary based on detected mobility conditions and handover requirements. The system monitors radio conditions and automatically adjusts beacon transmission timing without requiring station requests, thereby reducing overall power consumption while maintaining measurement effectiveness.
3Measurement precision
If inter-frequency scanning is performed without standard-defined framework, then channel measurements are obtained, but scanning consistency is poor
Solution Approach 1:
The patent applies parameter changes by establishing standardized measurement parameters for inter-frequency scanning, including defined scanning intervals, frequency hopping patterns, and measurement duration. The access point uses these standardized parameters to ensure consistent scanning behavior across different frequency channels and over time, thereby improving measurement accuracy while enhancing scanning consistency through parameter standardization.
Data Source
AI summary
A method for performing one or more measurement operations at a station (STA) device in a Wireless Local Area Network (WLAN) includes: transmitting, to an Access Point (AP), capability information indicating one or more parameters associated with Time Gap for Measurement (TGM) supported by the STA device; receiving, from the AP, a time gap configuration from the AP in response to the transmitted capability information; and performing the one or more measurement operations based on the received time gap configuration, wherein the one or more measurement operations comprise at least one of one or more intra-frequency measurements, one or more inter-frequency measurements, one or more out-of-band beacon and pilot measurements, and one or more cross-technology measurements.


