Frame Exchange Sequencing for Wi-Fi Puncturing and Sounding Sync
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Solution Overview
Problem
Wireless devices suffer from interference and data corruption due to unsynchronized sounding and data puncturing in densely deployed wireless networks, leading to performance overhead.
Innovation Solution
Implementing anti-motion and anti-interference frame exchange sequences (FES) that perform preamble puncturing sounding and data transmission in the same transmission opportunity (TXOP), using a sounding steering matrix based on beamforming feedback to account for channel condition changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sounding and data puncturing are performed independently in different transmission opportunities, then device complexity is reduced, but data reliability deteriorates due to data corruption from mismatched sounding profiles
Solution Approach 1:
The patent combines sounding transmission and data transmission into a single frame exchange sequence within the same transmission opportunity (TXOP). The sounding puncturing and data puncturing are synchronized to occur in the same non-OFDMA MRU, ensuring that the sounding profile accurately reflects the actual data transmission conditions. This merging eliminates the mismatch problem while maintaining manageable device complexity through unified resource allocation.
2Adaptability or versatility
If sounding puncturing is applied in one non-OFDMA MRU while data puncturing is in another non-OFDMA MRU, then resource allocation flexibility is improved, but measurement precision deteriorates due to inappropriate sounding application
Solution Approach 1:
The patent applies local quality by ensuring that sounding and data puncturing occur in the same specific non-OFDMA MRU location. This localized synchronization ensures that the channel sounding is performed on the exact same frequency resources where data will be transmitted, providing accurate local channel measurements for that specific MRU while still allowing flexible resource allocation across different MRUs through the coordinated puncturing mechanism.
3Reliability
If frame exchange sequence is implemented with synchronized sounding and data transmission, then data reliability is improved, but device complexity increases due to coordination requirements
Solution Approach 1:
The patent implements preliminary action by establishing the frame exchange sequence (FES) with pre-coordinated resource allocation before actual data transmission begins. The sounding transmission, beamforming feedback, and data transmission are pre-synchronized within the same TXOP, with all puncturing decisions made in advance. This preliminary coordination reduces real-time complexity during actual transmission while ensuring reliable synchronized operation.
Data Source
AI summary
Techniques pertaining to anti-motion and anti-interference frame exchange sequences in wireless communications are described. A station (STA), such as a Wi-Fi equipment, determines to enable a frame exchange sequence (FES). The STA then communicates with one or more other STAs by utilizing the FES in which preamble puncturing sounding and data transmission are performed in a same transmission opportunity (TXOP).