WLAN Sensing Measurement Reports Using Non-Uniform Quantization

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Solution Overview

Problem

Existing WLAN sensing technologies lack efficient methods for performing accurate and timely wireless sensing measurements, particularly in environments with multiple antennas and varying quantization needs, leading to suboptimal data reporting and interference management.

Innovation Solution

Implementing a sensing receiver and transmitter configuration that utilizes null data packets (NDPs) for measurement reporting, with non-uniform quantization and multi-antenna capabilities, enabling enhanced measurement types like CSI, CIR, and DMG/EDMG, and supporting delayed and aggregated reporting through enhanced trigger frames.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If uniform quantization is used for sensing measurements, then the system is simpler to implement, but measurement precision deteriorates in environments with multiple antennas and varying signal conditions

Engineering Contradiction:

Improvesensing measurement accuracyVSAvoidquantization complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements non-uniform quantization where the quantization step size varies based on signal characteristics such as received signal strength and channel conditions. This allows finer quantization for weak signals and coarser quantization for strong signals, improving measurement precision across varying signal conditions while adapting the complexity to actual needs rather than using a fixed uniform approach throughout

Inventive Principle:

Principle #35Parameter changes

2Productivity

If delayed and aggregated reporting is implemented, then data transmission efficiency improves, but measurement timeliness deteriorates

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidmeasurement reporting delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent implements dynamic reporting mechanisms where the reporting timing and aggregation level are adjusted based on application requirements, channel conditions, and traffic patterns. This allows the system to switch between immediate reporting for time-critical applications and aggregated reporting for efficiency-critical applications, making the timeliness characteristic dynamic rather than fixed

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments sensing measurements into different categories (e.g., periodic measurements, event-triggered measurements, aggregated reports) that can be reported at different times and with different frequencies. This segmentation allows critical measurements to be reported immediately while less critical measurements are aggregated, resolving the contradiction between timeliness and efficiency for different measurement types

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If multiple sensing measurement types are supported, then system versatility improves, but device complexity increases

Engineering Contradiction:

Improvesensing measurement type varietyVSAvoidmeasurement processing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal measurement framework where a single processing architecture can handle multiple sensing measurement types (e.g., channel state information, channel impulse response, distance, velocity) by configuring different parameters and processing modes. This multi-functional design allows the system to support diverse measurement types without proportionally increasing hardware complexity, as the same physical resources can be allocated to different measurement functions based on demand

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Measurement precision

If enhanced trigger frames with detailed parameters are used, then measurement control precision improves, but frame overhead increases

Engineering Contradiction:

Improvemeasurement control accuracyVSAvoidframe overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent implements selective parameter inclusion in trigger frames where only the parameters necessary for the specific measurement task are included. For example, if a simple periodic measurement is needed, only essential timing parameters are included, while detailed measurement parameters are omitted. This local optimization of frame content reduces overhead for simple tasks while maintaining precision control when needed for complex measurements

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250113217A1WLAN sensing measurement reports

Publication Date: 2025.04.03 INTERDIGITAL PATENT HOLDINGS INC

AI summary

A sensing receiver may be configured for wireless local area network (WLAN) sensing, The sensing receiver may be configured to receive, from a sensing transmitter, a packet, perform measurements on the received packet, and prepare a sensing measurement report, which may comprise at least a measurement report control field and a measurement report field. A measurement type dependent parameters subfield of the measurement report control field may be based on a measurement type. The sensing receiver may be configured to send, to the sensing transmitter, the sensing measurement report. Contents of the measurement report field may be based on the measurement type. The measurement type may comprise at least one of: a channel state information (CSI) type, a channel impulse response (CIR) type, or a directional multi-gigabit (DMG)/enhanced DMG (EDM) type. The packet may be a null data packet (NDP) or a physical layer protocol data unit (PPDU).