WLAN PHY Signaling with Segmented E-SIG for HARQ and Multi-AP

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Solution Overview

Problem

Existing wireless local area network (WLAN) systems face challenges in efficiently managing and optimizing 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-segment aggregated transmissions, and coordinated multi-AP transmissions, with improved signaling fields in the E-SIG to support hybrid automatic repeat request (HARQ) and coordinated multi-AP (C-MAP) operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If existing physical layer signaling protocols are used in WLAN systems, then device compatibility is maintained, but data transmission efficiency and reliability are suboptimal

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidtransmission reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent modifies physical layer signaling parameters by introducing enhanced signaling fields (E-SIG) with additional bits for HARQ process identification, redundancy version indication, and coordinated multi-AP transmission information. This allows optimization of transmission efficiency and reliability without changing the fundamental protocol structure, enabling devices to operate at improved performance levels while maintaining compatibility.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The signaling structure is segmented into mandatory SIG fields and optional E-SIG fields. This segmentation allows receiving devices to process at least the mandatory fields for basic operation while optional fields provide enhanced functionality for devices that support them, resolving the contradiction between maintaining compatibility and improving performance.

Inventive Principle:

Principle #1Segmentation

2Productivity

If enhanced physical layer signaling protocols are implemented, then data transmission efficiency is improved, but system complexity increases

Engineering Contradiction:

ImprovethroughputVSAvoidsignaling processing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic signaling where the E-SIG fields are conditionally present based on transmission requirements. The signaling structure adapts its complexity dynamically - using enhanced fields only when HARQ or coordinated multi-AP features are activated, thereby improving throughput when needed while minimizing complexity for basic transmissions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The enhanced signaling fields serve multiple functions: HARQ process identification, redundancy version indication, and coordinated multi-AP transmission coordination. This multi-functionality reduces the need for separate dedicated signaling mechanisms, improving throughput while limiting the increase in overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If optional features are supported through additional signaling bits, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvefeature support capabilityVSAvoidsignal field processing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The signaling is segmented into mandatory fields that all devices must process and optional E-SIG fields that provide additional feature support. Devices can implement basic functionality by processing only mandatory fields, while devices requiring enhanced adaptability can implement support for optional fields, thus improving adaptability without mandating increased complexity for all devices.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The optional E-SIG fields act as an intermediary layer between the basic mandatory signaling and advanced features. This intermediary structure allows devices to selectively engage with enhanced functionality through clearly defined optional fields, improving adaptability while giving devices control over their own complexity levels.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260075464A1Methods, architectures, apparatuses and systems directed to physical layer signaling in a wireless local area network ("WLAN") system

Publication Date: 2026.03.12 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.