Uplink Multiple Access Sounding Sequences for WLAN Channel Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently sensing channel conditions across multiple stations (STAs) in a wireless local area network (WLAN), particularly in identifying and utilizing the appropriate STAs for sensing operations, especially when dealing with a large number of STAs in a home environment.
Innovation Solution
The implementation of uplink multiple access sounding sequences, where a first wireless communications device transmits a message to allocate frequency-based resource units to second devices, allowing them to transmit responsive messages that are used for channel sensing measurements, enabling the estimation of channels and improving sensing accuracy by allowing more STAs to be sensed simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional channel sensing methods are used in WLAN systems, then the sensing process can be implemented, but the sensing accuracy and speed deteriorate when dealing with a large number of stations
Solution Approach 1:
The patent segments the channel sensing process by allocating specific frequency-based resource units to different stations. Each station transmits sounding sequences on its assigned frequency resources, allowing the access point to simultaneously sense multiple stations without interference. This segmentation resolves the contradiction by enabling parallel sensing operations that improve both accuracy and speed.
Solution Approach 2:
The patent introduces frequency-based resource allocation as an additional dimension for organizing channel sensing operations. By distributing stations across different frequency resources rather than using only time-division or code-division methods, the system can simultaneously sense more stations with improved accuracy and speed.
2Productivity
If frequency-based resource units are allocated to multiple stations for simultaneous transmission, then sensing speed improves, but resource allocation complexity increases
Solution Approach 1:
The patent employs a universal frequency-based resource allocation framework that can accommodate multiple stations simultaneously. The access point uses a standardized mechanism to allocate frequency resource units to different stations, managing resources efficiently without requiring complex station-specific protocols. This universality enables high-speed parallel sensing while keeping allocation complexity manageable.
3Measurement precision
If more stations are sensed simultaneously using frequency-based resource units, then sensing performance improves, but the system requires more sophisticated resource management
Solution Approach 1:
The patent implements dynamic frequency-based resource allocation where the access point can flexibly assign frequency resource units to different stations based on current sensing requirements. This dynamic allocation allows the system to adapt to varying numbers of stations and sensing priorities, maintaining high sensing performance while providing the necessary resource management flexibility.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A first wireless communications device may transmit, to one or more second wireless communications devices, a first message that triggers transmission of a second message by each of the one or more second wireless communications devices, the first message allocating to each of the one or more second wireless communications devices a respective frequency-based resource unit for transmission of the second message, each of the respective frequency-based resource units spanning a portion of a channel bandwidth of a channel. The first wireless communications device may perform channel sensing measurements on the second message received from each of the one or more second wireless communications devices. The first wireless communications device may estimate the channel based on the channel sensing measurements performed on the respective second messages received on the respective frequency-based resource units.