Trigger Frame Pre-FCS Structure for Dynamic Sub-Band Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing dynamic sub-band operations to support delay-sensitive applications like augmented reality and unmanned vehicles, requiring improved channel switching and bandwidth management to reduce latency and increase throughput.
Innovation Solution
The introduction of a trigger frame with a pre-frame check sequence (pre-FCS) field and padding field, allowing for dynamic sub-band switch operations, where the AP generates a trigger frame to request stations to perform a dynamic sub-band switch, and determines the success based on the response received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic sub-band switch operation is implemented to support delay-sensitive applications, then throughput and latency performance are improved, but channel switching complexity and management overhead increase
Solution Approach 1:
The patent applies preliminary action by introducing a trigger frame mechanism that proactively initiates sub-band switching operations before data transmission begins. The access point sends trigger frames containing pre-computed switching parameters and timing information, allowing stations to prepare and execute channel switches in advance, thereby reducing actual switching complexity during data flow and improving throughput for delay-sensitive applications.
Solution Approach 2:
The patent implements feedback mechanisms through response frames that confirm successful sub-band switching and trigger frame acknowledgment. This feedback loop allows the access point to verify switching status, adjust future trigger frames accordingly, and maintain optimal channel configuration, thereby managing the complexity of dynamic switching through structured information exchange between access points and stations.
2Productivity
If trigger frame with pre-FCS field is added to enable dynamic sub-band operation, then channel switching efficiency is improved, but frame structure complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the frame check sequence verification into two distinct phases: pre-FCS (frame check sequence preliminary) and post-FCS verification. The pre-FCS field is inserted at a specific location in the trigger frame structure to enable early validation of channel switching parameters, while the complete FCS verification occurs after the actual data transmission. This segmentation allows efficient channel switching by validating critical parameters beforehand without requiring complete frame processing, thus improving switching efficiency while managing frame structure complexity through modular verification.
Data Source
AI summary
An embodiment includes generating, by an access point (AP), a trigger frame that solicits a response from one or more stations (STAs), where the trigger frame includes a pre frame check sequence (pre-FCS) field, a padding field, and a frame check sequence (FCS) field, the pre-FCS field preceding the padding field, transmitting, to the one or more STAs, the trigger frame to request the one or more STAs to perform a dynamic sub-band switch operation, and determining whether the dynamic sub-band switch operation is successfully performed at the one or more STAs based on whether or not a response is received from the one or more STAs in response to the trigger frame.