EHT Trigger-Based Preamble RU Bandwidth Adaptation
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Solution Overview
Problem
In current wireless communication systems, especially in the 802.11 EHT standard, the U-SIG and EHT-SIG fields are not designed for EHT-trigger based (TB) PPDU, leading to inefficient bandwidth usage when a station (STA) has idle bandwidth for uplink data transmission but does not transmit due to mismatched resource unit (RU) allocation.
Innovation Solution
The proposed solution involves designing the U-SIG and EHT-SIG fields for EHT TB PPDU to enhance bandwidth allocation efficiency. This includes facilitating different options to indicate RU assignment changes in the TB PPDU, allowing the STA to overwrite the RU allocation signaling from the trigger frame, and encoding the U-SIG field with an indication of the RU bandwidth allocation to be used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the U-SIG and EHT-SIG fields are not designed for EHT-trigger based PPDU, then the system maintains compatibility with existing standards, but bandwidth usage efficiency deteriorates when STA has idle bandwidth for uplink transmission
Solution Approach 1:
The patent introduces dynamic RU allocation indication in the U-SIG field, allowing the STA to indicate its actual available bandwidth dynamically. This enables the system to adapt bandwidth allocation in real-time based on STA's channel conditions and idle bandwidth, resolving the contradiction between adaptability and standard compatibility.
Solution Approach 2:
The patent modifies the U-SIG field structure to include RU allocation indication parameters that allow flexible bandwidth specification. By changing the parameter structure of existing fields rather than creating new fields, the patent achieves improved bandwidth allocation efficiency while maintaining reasonable system complexity.
2Productivity
If the STA cannot overwrite the RU allocation signaling from the trigger frame, then the system maintains centralized control, but bandwidth waste increases when the allocated RU does not match the STA's idle bandwidth
Solution Approach 1:
The patent implements a feedback mechanism where the STA indicates its actual available RU bandwidth in the U-SIG field. This feedback allows the system to adjust the actual transmission bandwidth to match the STA's idle bandwidth, preventing bandwidth waste while maintaining centralized control through the AP's initial allocation.
Solution Approach 2:
The patent allows the STA to preliminarily indicate its available bandwidth in the U-SIG field before actual data transmission. This preliminary action enables the system to prepare appropriate bandwidth allocation, ensuring that the STA can transmit on idle channels without wasting bandwidth resources.
3Ease of operation
If the RU allocation is fixed by the trigger frame, then the system maintains simple resource management, but communication efficiency deteriorates when channel conditions change
Solution Approach 1:
The patent introduces dynamic RU allocation indication in the U-SIG field, allowing the STA to indicate its actual available bandwidth dynamically. This enables the system to adapt bandwidth allocation in real-time based on STA's channel conditions and idle bandwidth, resolving the contradiction between adaptability and standard compatibility.
Solution Approach 2:
The patent modifies the U-SIG field structure to include RU allocation indication parameters that allow flexible bandwidth specification. By changing the parameter structure of existing fields rather than creating new fields, the patent achieves improved bandwidth allocation efficiency while maintaining reasonable system complexity.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to extremely high throughput (EHT) trigger based (TB) preamble. A device may receive a trigger frame from an associated access point (AP), wherein the trigger frame comprises one or more resource unit (RU) bandwidths (BWs) allocated to the device. The device may generate an EHT physical layer protocol data unit (PPDU) based on receiving the trigger frame from the access point, wherein the PPDU comprises an EHT preamble that includes a signaling (U-SIG) field. The device may encode the U-SIG field with an indication of one or more resource unit (RU) bandwidth (BW) allocations to be used for sending the PPDU to the AP, wherein the indication is a value associated with a first option of one or more options of selectable RU BWs. The device may cause to send the PPDU to the AP and an uplink data transmission direction.