Per-A-MPDU Subframe Encoding for Dynamic Wi-Fi Bandwidth
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Solution Overview
Problem
Current Wi-Fi technologies lack flexibility in adjusting transmission bandwidth and modulation and coding schemes during ongoing PPDU transmissions, limiting the efficient use of spectrum and preventing dynamic changes in response to available secondary channels.
Innovation Solution
Introduction of per-A-MPDU-subframe encoding and decoding, allowing for dynamic changes in transmission configurations such as bandwidth and modulation and coding schemes within each subframe of a PPDU, through the use of new signaling fields and training fields, enabling on-the-fly adjustments even during ongoing transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional Wi-Fi transmission methods are used with fixed encoding for the entire PPDU, then processing overhead is reduced and implementation is simpler, but spectral efficiency deteriorates because dynamic changes in transmission parameters cannot be made during ongoing transmissions
Solution Approach 1:
The PPDU transmission is divided into multiple A-MPDU subframes, each capable of independent encoding and decoding. This segmentation allows the transmitter to change transmission parameters (bandwidth, MCS) between subframes while maintaining simpler processing within each subframe, thus improving spectral efficiency without excessive complexity
Solution Approach 2:
The system introduces dynamic parameter changes within the PPDU structure by allowing different A-MPDU subframes to use different transmission configurations. The encoder/decoder can adaptively adjust bandwidth and modulation schemes on-the-fly based on channel conditions, making the transmission system dynamic rather than static
2Adaptability or versatility
If the entire DATA field within a PPDU is scrambled and encoded as a single unit, then implementation is simpler and processing overhead is reduced, but adaptability deteriorates because transmission bandwidth and MCS cannot be changed during the transmission
Solution Approach 1:
The DATA field is segmented into multiple A-MPDU subframes, each with its own encoder/decoder instance. This allows independent encoding of each subframe with potentially different parameters, enabling dynamic adaptation while keeping individual encoding operations manageable
Solution Approach 2:
The system enables parameter changes (bandwidth, MCS) between A-MPDU subframes by resetting the encoder/decoder for each subframe. This allows transmission parameters to be adjusted dynamically based on available secondary channels and traffic conditions, improving adaptability
3Productivity
If fixed transmission parameters are used throughout the entire PPDU transmission, then device complexity is reduced and implementation is easier, but spectral efficiency deteriorates because available secondary channels cannot be utilized
Solution Approach 1:
The transmission system becomes dynamic by allowing parameter changes between A-MPDU subframes. The encoder/decoder can be reset and reconfigured for each subframe to match current channel conditions and available bandwidth, enabling utilization of secondary channels while maintaining reasonable implementation complexity
Data Source
AI summary
This disclosure describes systems, methods, and devices related to probes with service set identifier (SSID). A device may determine one or more access points (APs) in an enterprise extended service set (ESS). The device may identify a probe request received from a first station device, wherein the probe request comprises a service set element, wherein the service set element comprises a variable number of service set fields based on a number of APs in the ESS. The device may determine that a service set that matches at least one of the service set fields in the service set element. The device may cause to send a probe response to the first station device in response to the probe request.