WLAN Capability Signaling for Modulation-Specific Packet Padding

Solution Overview

Problem

Current wireless local area network technologies lack a solution for indicating a nominal packet padding value when multiple modulation schemes are used, which affects the receiver's processing time for physical layer protocol data units.

Innovation Solution

A capability indication method and apparatus are developed to determine and indicate a nominal packet padding value for receivers supporting multiple modulation schemes, ensuring sufficient processing time by using capability information that includes nominal packet padding values for various configurations and modulation schemes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a receiver indicates a nominal packet padding value for a single modulation scheme, then the transmitter can determine the packet extension duration, but there is no solution for indicating nominal packet padding values when multiple modulation schemes are supported

Engineering Contradiction:

Improvemodulation scheme supportVSAvoidcapability indication

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The capability information is segmented into multiple indication fields: a first indication field for nominal packet padding values corresponding to different modulation schemes, and a second indication field for nominal packet padding values corresponding to different resource unit allocations. This segmentation allows the receiver to indicate different padding values for different modulation schemes and resource allocations independently.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent adds a new dimension to the capability indication by introducing modulation scheme-specific nominal packet padding value indication. Instead of a single nominal packet padding value, the system now indicates multiple values corresponding to different modulation schemes (QPSK, 16-QAM, 64-QAM, 256-QAM, etc.), effectively adding a modulation scheme dimension to the indication structure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Measurement precision

If the receiver requires different processing times for different modulation schemes, then accurate processing time can be ensured, but the indication mechanism becomes more complex

Engineering Contradiction:

Improveprocessing time accuracyVSAvoidindication mechanism

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system dynamically selects the appropriate nominal packet padding value based on the modulation scheme being used. The transmitter determines which modulation scheme is employed and then selects the corresponding nominal packet padding value from the indicated set, allowing the processing time to be dynamically adapted to the specific modulation scheme requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter being indicated from a single nominal packet padding value to multiple nominal packet padding values corresponding to different modulation schemes. This parameter change allows the system to accurately reflect the different processing time requirements of different modulation schemes while maintaining a structured indication mechanism.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If a single nominal packet padding value is used for all modulation schemes, then the indication mechanism remains simple, but receivers cannot have sufficient processing time for higher-order modulation schemes

Engineering Contradiction:

Improveindication mechanismVSAvoidprocessing time sufficiency

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The capability information is segmented into multiple indication fields: a first indication field for nominal packet padding values corresponding to different modulation schemes, and a second indication field for nominal packet padding values corresponding to different resource unit allocations. This segmentation allows the receiver to indicate different padding values for different modulation schemes and resource allocations independently.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent adds a new dimension to the capability indication by introducing modulation scheme-specific nominal packet padding value indication. Instead of a single nominal packet padding value, the system now indicates multiple values corresponding to different modulation schemes (QPSK, 16-QAM, 64-QAM, 256-QAM, etc.), effectively adding a modulation scheme dimension to the indication structure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20260067672A1Capability indication method and capability determining method in wireless local area network, and apparatus

Publication Date: 2026.03.05 HUAWEI TECH CO LTD

AI summary

This application discloses a capability indication method and a capability determining method in a wireless local area network, and an apparatus. The capability indication method includes: A first device determines capability information, and sends the capability information to a second device. The capability information includes a nominal packet padding subfield, and the nominal packet padding subfield indicates a corresponding nominal packet padding value used when the second device sends a physical layer data packet to the first device. The nominal packet padding value is for all NSSs and all RU allocations that the first device supports, and for at least two modulation schemes used by the second device on a configured frequency domain resource or a configured spatial stream.