EHT Frame Expansion for BW320 Wireless Ranging Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless ranging procedures, such as IEEE 802.11az, are limited to a maximum bandwidth of 160 MHz, and there is a need for an approach to expand the EHT frame format to support larger bandwidths like BW320 for improved performance and accuracy in wireless communication.
Innovation Solution
The method involves transmitting and receiving frames using EHT frames with 320 MHz physical layer protocol data units (PPDUs), incorporating long training field (LTF) repetition and security features, and defining signal preamble puncturing patterns to support BW320 ranging, reducing interference and improving spectrum efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing wireless ranging procedures (IEEE 802.11az) are used, then ranging functionality is provided, but bandwidth is limited to maximum 160 MHz
Solution Approach 1:
The patent modifies the EHT frame format by changing the bandwidth parameter from the traditional 160 MHz maximum to support up to 320 MHz. This is achieved by expanding the bandwidth field in the frame structure and adjusting related signaling parameters to accommodate the larger bandwidth requirement for high-precision ranging operations.
Solution Approach 2:
The patent segments the 320 MHz bandwidth into multiple 80 MHz channels and introduces a bandwidth indication field that can specify different channel combinations. This segmentation allows the system to flexibly configure the ranging bandwidth and provides adaptability for different deployment scenarios while maintaining support for the extended 320 MHz capability.
2Measurement precision
If bandwidth is increased to 320 MHz for improved ranging performance, then ranging accuracy improves, but frame format complexity increases
Solution Approach 1:
The patent designs the EHT frame format with a universal bandwidth indication mechanism that can represent both traditional 160 MHz and extended 320 MHz configurations using the same basic frame structure. The bandwidth field and associated signaling elements are designed to be multi-functional, accommodating different bandwidth scenarios without requiring entirely separate frame formats.
Solution Approach 2:
The patent introduces dynamic bandwidth configuration through signaling fields that allow the bandwidth to be adjusted based on current network conditions and requirements. The frame format includes flexible indication mechanisms that enable the system to dynamically switch between different bandwidth modes (160 MHz, 320 MHz, or punctured configurations) without fixed structural constraints.
3Productivity
If continuous 320 MHz bandwidth is used for ranging, then ranging performance is maximized, but interference and spectrum efficiency issues arise
Solution Approach 1:
The patent applies different quality characteristics to different portions of the spectrum by introducing puncturing patterns that selectively activate or deactivate specific 80 MHz channels within the 320 MHz bandwidth. This allows the system to apply high-quality continuous bandwidth where interference is low and use punctured or reduced bandwidth where interference is present, optimizing performance locally across the spectrum.
Solution Approach 2:
The patent implements dynamic bandwidth adaptation through puncturing patterns that can be adjusted in real-time based on spectrum conditions. The system can dynamically switch between continuous 320 MHz operation, punctured configurations (e.g., 280 MHz, 240 MHz), or even 160 MHz modes, allowing flexible response to changing interference conditions while maintaining optimal ranging performance.
Data Source
AI summary
Embodiments of the present invention are drawn to systems, apparatus and methods that perform wireless ranging procedures using EHT frames supporting large bandwidth transmission. Moreover, ranging specifications are expanded for the EHT frame format in order to support BW320 ranging with improved performance and accuracy. Embodiments of the present invention support high-bandwidth BW320 and BW240 wireless ranging using a EHT frame format and support 802.11az ranging using a high efficiency (HE) for 802.11be devices. Long training field (LTF) repetition features and security features are also described for EHT-LTFs, and signaling of preamble puncturing patterns are defined for 320 MHz physical layer protocol data units (PPDUs) carried in the U-SIG field and in Trigger Frames to improve spectrum efficiency and reduce interference, according to embodiments.