WLAN PHY Signaling with Segmented EHT PPDU Resource Allocation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless local area network (WLAN) systems face challenges in efficiently managing physical layer signaling, particularly in high-efficiency and multi-user scenarios, leading to suboptimal data transmission and reception.

Innovation Solution

Implementing enhanced physical layer signaling protocols, including high-efficiency physical layer protocol data units (HE PPDU) formats, multi-user PPDU transmissions, and coordinated multi-AP transmissions, with improved signaling fields in the E-SIG to support hybrid automatic repeat request and coordinated multi-AP operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If stations adjust bandwidth to accommodate multiple user transmissions, then resource allocation flexibility improves, but energy consumption increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidenergy consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The bandwidth is divided into multiple segments, each capable of carrying independent transmissions. Stations can selectively activate only the segments needed for current transmissions, avoiding the need to adjust the entire bandwidth and reducing energy consumption while maintaining resource allocation flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically configures bandwidth segment assignments and alignments based on current transmission requirements. This allows the network to adapt resource allocation to actual needs without permanently configuring wider bandwidth, thereby reducing energy consumption when full bandwidth is not required.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If wider bandwidth is used to manage multiple user transmissions, then resource allocation capability improves, but spectral efficiency deteriorates

Engineering Contradiction:

Improveresource allocation capabilityVSAvoidspectral efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

By segmenting the bandwidth into independent units, the system can allocate resources efficiently within each segment using compact signaling. This avoids the overhead and inefficiency of managing wider bandwidth as a single unit, thereby improving spectral efficiency while maintaining resource allocation capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the granularity of bandwidth allocation from wideband to segment-level parameters. This allows more precise control over resource allocation, improving spectral efficiency by eliminating wasted resources while maintaining the capability to serve multiple users through flexible segment assignment.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If concurrent transmissions across multiple segments are enabled, then resource utilization improves, but alignment complexity increases

Engineering Contradiction:

Improveresource utilizationVSAvoidalignment complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The transmission medium is divided into independently manageable segments with defined boundaries. Each segment can be allocated and aligned separately using standardized signaling procedures, reducing the overall alignment complexity compared to managing continuous wideband transmissions while enabling concurrent transmissions across multiple segments to improve resource utilization.

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If flexible signaling is implemented to support multiple features, then feature support capability improves, but signaling overhead increases

Engineering Contradiction:

Improvefeature support capabilityVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The signaling mechanism is designed to be universal, using the same basic signaling framework to support multiple features including HARQ, coordinated multi-AP transmissions, and bandwidth segment management. This multi-functional approach reduces the need for separate signaling protocols for each feature, thereby reducing overall signaling overhead while maintaining feature support capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12634755B2Methods, architectures, apparatuses and systems directed to physical layer signaling in a wireless local area network (“WLAN”) system

Publication Date: 2026.05.19 INTERDIGITAL PATENT HOLDINGS INC

AI summary

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products directed physical layer signaling in a wireless local area network system are provided. Among the methods is a method that may include any of generating an extremely high throughput (EHT) physical (PHY) layer protocol data unit (PDU) (PPDU) based on a PPDU format defining a preamble comprising (i) a fixed duration universal signaling (U-SIG) field, (ii) an EHT signaling (EHT-SIG) field, and (iii) an EHT short training field (EHT-STF), wherein the U-SIG and EHT-SIG fields respectively comprise an extra signaling indicator and extra signaling to support a third feature; and transmitting the U-SIG and EHT-SIG fields on a first bandwidth segment, followed by the EHT-STF on any of the first bandwidth segment and a second bandwidth segment, followed by (iii) an EHT data field on any of the first and second bandwidth segments.