WLAN Short Beacon Versioning for Faster Link Setup
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Solution Overview
Problem
WLAN systems face inefficiencies in beacon transmission due to high overhead and long transmission times, which hinder fast link setup and increase network latency.
Innovation Solution
Implement a multiple level beaconing scheme that organizes beacon information into different levels based on attributes such as purpose, periodicity, and stability, allowing for targeted and efficient transmission only when necessary, using system configuration parameters to manage beacon intervals and content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional beacon transmission is used to provide comprehensive BSS information, then all necessary information is provided to STAs, but transmission overhead increases and link setup time increases
Solution Approach 1:
The patent segments BSS information into two categories: essential information (BSSID, timestamp, basic capabilities) transmitted in every beacon, and optional information (detailed capability elements, operational parameters) transmitted selectively based on system configuration and actual needs. This segmentation allows the beacon to provide necessary information while reducing transmission time and overhead.
Solution Approach 2:
The patent implements partial action by transmitting only the essential subset of BSS information in each beacon rather than all possible information elements. The beacon includes a configurable set of information elements based on system parameters, providing sufficient information for STA association while avoiding the transmission overhead of complete information sets.
2Loss of information
If comprehensive BSS information is included in every beacon, then all STAs receive complete information, but beacon overhead increases significantly
Solution Approach 1:
The patent divides BSS information into mandatory elements (BSSID, timestamp, basic capabilities) that are always transmitted, and optional elements (detailed capabilities, operational parameters) that are transmitted selectively based on system configuration parameters. This reduces beacon size and transmission overhead while ensuring essential information is always available to STAs.
Solution Approach 2:
The patent changes the parameter set included in each beacon dynamically based on system configuration parameters such as beacon interval, BSS type (ad-hoc or infrastructure), and optional information element flags. This allows the beacon to adapt its content to minimize overhead while maintaining information completeness for the specific network scenario.
3Loss of time
If fast link setup is implemented by reducing beacon information, then link setup time decreases, but information completeness may be compromised
Solution Approach 1:
The patent transmits a partial set of BSS information elements that are sufficient for fast link setup and STA association. The included elements cover essential functionality (BSSID identification, timestamp for synchronization, basic capability flags) while omitting optional detailed elements, achieving fast setup without compromising necessary information completeness.
Solution Approach 2:
The patent configures the beacon information elements based on system parameters that reflect the actual network requirements. For fast link setup scenarios, the beacon includes minimal essential elements; for networks requiring detailed capability information, additional optional elements are included. This dynamic parameter adjustment optimizes the balance between setup speed and information completeness.
Data Source
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AI summary
A station (STA) in wireless communication with a wireless local area network, receiving a short beacon comprising an element that indicates a version of the short beacon, the short beacon comprising fewer fields than a legacy beacon; on a condition that the element indicates that the short beacon has not changed from a known version of the short beacon, accessing a medium; and on a condition that the element indicates that the short beacon has changed from a known version of the short beacon, performing at least one of decoding the short beacon or sending a probe request, and accessing the medium.