FILS Beacon Identifier Bits for WLAN Link Setup Compatibility
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Solution Overview
Problem
The existing initial link setup process in wireless local area networks (WLANs) is incompatible when a station (STA) not supporting the Fast Initial Link Setup (FILS) function enters a WLAN supporting FILS, and vice versa, preventing fast initial link establishment between STAs and access points (APs).
Innovation Solution
A communication device and method that include a service processing module generating beacon frames or initial link setup messages with identifier information bits to indicate support for the FILS function, allowing APs and STAs to determine compatibility and set up links in appropriate modes, whether in traditional or fast initial link setup modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the AP uses FILS mode for initial link setup, then fast initial link establishment is achieved, but STAs not supporting FILS cannot analyze the link instruction and establish connection
Solution Approach 1:
The AP is designed to support multiple initial link setup modes (both traditional and FILS modes) and can dynamically select the appropriate mode based on the STA's capabilities. This multi-functionality ensures that the AP can serve both FILS-capable and non-FILS STAs, achieving universality in the wireless network.
Solution Approach 2:
The AP dynamically adjusts its initial link setup mode based on real-time detection of STA capabilities. When a STA associates, the AP determines whether it supports FILS and switches between FILS mode and traditional mode accordingly. This dynamic adaptation resolves the contradiction between speed and compatibility.
2Adaptability or versatility
If the AP uses traditional initial link setup mode, then compatibility with all STAs is maintained, but the link setup process is slow and cannot meet the 100 STAs within one second requirement
Solution Approach 1:
The system dynamically selects between traditional mode and FILS mode based on STA capability detection. When FILS-capable STAs are present, the AP switches to FILS mode to achieve high-speed link setup (meeting the 100 STAs/second requirement). When non-FILS STAs are detected, it falls back to traditional mode, ensuring compatibility. This dynamic switching resolves the contradiction between productivity and adaptability.
Solution Approach 2:
The AP changes the operational parameter (initial link setup mode) based on the detected STA capabilities. By transitioning between traditional mode and FILS mode, the system optimizes the link setup process speed while maintaining broad compatibility across different STA types.
3Speed
If an STA supporting FILS enters a WLAN not supporting FILS, then the STA cannot set up fast initial link, but using traditional mode reduces the speed advantage
Solution Approach 1:
The STA dynamically adapts its initial link setup mode based on the WLAN's capabilities. Upon entering a WLAN, the STA detects whether the AP supports FILS and automatically selects the appropriate mode (FILS mode for FILS-capable APs, traditional mode for non-FILS APs). This dynamic adaptation ensures the STA maintains high-speed capability when possible while remaining compatible with any WLAN.
Data Source
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AI summary
Provided in the present invention is a fast initial link setup communication device and method. The device comprises: a service processing module for generating a beacon frame, wherein a physical frame header of the beacon frame includes a first identifier information bit and/or a physical layer convergence protocol service data unit comprises a second identifier information bit, and the value of the first identifier information bit being a first value and/or the value of the second identifier information bit being a second value express that the fast initial link setup function is supported, and for transmitting the beacon frame, and/or, for receiving an initial link setup first message, wherein the value of the first identifier information bit in the physical frame header of the initial link setup first message being the first value and/or the value of the second identifier information bit in the physical layer convergence protocol service data unit being the second value express that the function is supported; and a wireless transceiver module for exchanging data with externals to the device. The present invention solves the compatibility problem when an STA not supporting the FILS function enters a WLAN supporting the FILS function and when an STA supporting the FILS function enters a WLAN not supporting the FILS function.