Beacon Frame Guard Interval Signaling for WLAN Compatibility
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Solution Overview
Problem
The IEEE 802.11ax standard introduces multiple guard interval (GI) lengths, but existing methods do not provide a way for terminals to set an appropriate GI length for data communication with access devices.
Innovation Solution
An access device constructs a beacon frame with a newly added field representing multiple supported GI lengths, allowing terminals to select a matching GI length for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed guard interval length is used in existing WLAN standards, then the system maintains simplicity and compatibility, but it cannot accommodate the multiple options proposed by the next-generation HEW standard
Solution Approach 1:
The patent applies dynamics by making the guard interval length configurable and selectable rather than fixed. The access device dynamically supports multiple guard interval lengths (0.8us, 1.6us, 3.2us) and allows terminals to select the appropriate length based on channel conditions, transforming a static parameter into a dynamic one that adapts to different scenarios
Solution Approach 2:
The patent changes the guard interval length parameter from a fixed value to a multi-option parameter. By introducing a newly added field in the beacon frame that indicates supported guard interval lengths, the system enables parameter variation while maintaining standard compatibility, allowing terminals to select from multiple guard interval options (0.8us, 1.6us, 3.2us) based on their needs
2Adaptability or versatility
If multiple guard interval lengths are supported in HEW standard, then the system gains flexibility for different channel conditions, but there is no method for setting the guard interval length for data communication
Solution Approach 1:
The patent applies self-service by enabling terminals to autonomously select the appropriate guard interval length from the options indicated in the beacon frame. The terminal evaluates its own requirements and channel conditions to choose the most suitable guard interval length without requiring manual configuration or complex negotiation protocols, making the system easy to operate while supporting multiple options
Solution Approach 2:
The patent applies preliminary action by having the access device pre-indicate the supported guard interval lengths in the beacon frame before actual data communication occurs. This advance notification allows terminals to make informed decisions about guard interval selection without requiring real-time negotiation, simplifying the operation process
Data Source
AI summary
A data communication method and a related apparatus are provided, and the data communication method includes: constructing, by an access device, a beacon frame, where the beacon frame includes a newly added field, and the newly added field represents multiple data guard interval lengths supported by the access device; and broadcasting, by the access device, the beacon frame, so that a terminal selects an available guard interval length matching a data guard interval length supported by the terminal from the beacon frame, and performs data communication with the access device by using the available guard interval length. By using the present invention, data communication between the access device and the terminal can be implemented when the access device supports multiple data guard interval lengths.