UHR Trigger Frame Intermediate FCS Padding
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Solution Overview
Problem
Existing wireless communication protocols, particularly in IEEE 802.11 standards, face challenges in efficiently managing trigger frames to support high-throughput uplink communications and ensure compatibility with multiple standards.
Innovation Solution
The development of a UHR trigger frame format that includes an intermediate FCS value and a PN+MIC field, allowing for flexible design and compatibility with both legacy and non-legacy devices, while supporting bandwidths up to 320 MHz and 16 spatial streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single trigger frame design is used to solicit both legacy and non-legacy PPDUs, then compatibility with multiple standards is improved, but the complexity of managing different frame formats and ensuring proper interpretation increases
Solution Approach 1:
The trigger frame is segmented into distinct functional areas: a legacy interpretation section that legacy devices understand, and a non-legacy section with intermediate FCS values that UHR devices can utilize. This segmentation allows each device type to process only the relevant portion, reducing interpretation complexity while maintaining multi-standard compatibility.
Solution Approach 2:
An intermediate FCS value is introduced as a mediator between legacy and non-legacy frame structures. This intermediate element serves as a transition point that UHR devices can recognize and process, while legacy devices simply ignore it as part of the padding field, thereby enabling seamless multi-standard operation without increasing legacy device complexity.
2Reliability
If an intermediate FCS value is included in the padding field, then reliability of frame verification for UHR devices is improved, but the length and structure complexity of the trigger frame increases
Solution Approach 1:
The intermediate FCS value is merged into the existing padding field structure rather than creating a separate dedicated field. This combining approach allows UHR devices to extract verification information from the padding field while legacy devices continue to interpret the entire padding field as standard padding, thereby improving reliability without increasing structural complexity.
Solution Approach 2:
The padding field is given multi-functionality: it serves as standard padding for legacy devices while simultaneously containing an intermediate FCS value for UHR device verification. This universal design allows a single field to fulfill multiple purposes, improving reliability without adding additional structural elements that would increase complexity.
3Productivity
If the trigger frame supports bandwidths up to 320 MHz and 16 spatial streams, then data throughput is improved, but the requirements for device capabilities and processing power increase
Solution Approach 1:
The trigger frame structure is designed to be dynamic in its interpretation: UHR devices with high capabilities can fully process the enhanced frame structure supporting 320 MHz and 16 spatial streams, while legacy devices automatically adapt by processing only the compatible portion. This dynamic interpretation allows high throughput when needed without requiring all devices to have high processing power.
Solution Approach 2:
The frame utilizes parameter changes to enable high throughput: bandwidth parameters can be configured for up to 320 MHz and spatial stream parameters for up to 16 streams, but these parameters are only actively processed by UHR devices. Legacy devices operate with their native parameter limitations, thereby achieving high productivity when supported without universally increasing device complexity requirements.
Data Source
AI summary
Methods and apparatus for generating trigger frames that solicit PPDUs from one or more client devices. In an example method, a trigger frame is generated in accordance with the IEEE 802.11bn amendment (UHR) to the IEEE 802.11 standard. The method begins by determining a time duration requirement (or padding field length requirement) for preparing an uplink transmission from a client device. A trigger frame is generated (e.g., by an access point) that includes a frame check sequence (FCS) field, a padding field, and an intermediate FCS value that is included in the padding field. In an example, the dedicated fields of the trigger frame do not explicitly indicate the location of the intermediate FCS value. For a protected trigger frame, a MIC value is further included in the padding field. In other examples, the intermediate FCS value is included within one or more User Info fields of the trigger frame.