WLAN Control Field Configuration for Resource Allocation

Solution Overview

Problem

Next-generation wireless local area networks (WLANs) face challenges in improving spectrum efficiency and area throughput, especially in dense environments with multiple access points and stations, and outdoor settings, where existing technologies struggle to enhance performance and manage interference effectively.

Innovation Solution

A method for configuring a control field within the physical layer protocol data unit (PPDU) in WLAN systems, utilizing resource units across multiple frequency bands, includes a common control field for interpreting the PPDU and signal fields with identification and allocation information, enabling efficient resource allocation and improved performance by optimizing frequency band usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a traditional control field structure is used in PPDU, then the system maintains simplicity and compatibility with existing standards, but resource allocation efficiency and system performance in dense environments deteriorate

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidcontrol field structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control field is segmented into multiple independent parts: common control information, per-user control information, and resource allocation information. Each segment handles specific functions, allowing efficient resource allocation while maintaining structured organization. The segmentation enables the system to manage complex resource allocation in dense environments without overwhelming the control field structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimensional structure to the control field by organizing information across multiple dimensions: frequency band dimension (first to fourth frequency bands), user dimension (multiple STAs), and resource unit dimension (RUs). This multi-dimensional organization allows efficient resource allocation in dense environments while maintaining systematic control.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If resource units are allocated across multiple frequency bands, then spectrum efficiency and area throughput improve, but the complexity of managing and interpreting PPDU increases

Engineering Contradiction:

Improvearea throughputVSAvoidPPDU interpretation complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control field is segmented into multiple independent parts: common control information, per-user control information, and resource allocation information. Each segment handles specific functions, allowing efficient resource allocation while maintaining structured organization. The segmentation enables the system to manage complex resource allocation in dense environments without overwhelming the control field structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces mapping identifiers as intermediary elements that facilitate the interpretation of PPDU. These mapping identifiers act as mediators between the control field and the data fields, providing a systematic way to interpret resource allocation across multiple frequency bands without increasing overall system complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If the control field includes detailed allocation information for multiple STAs and RUs, then resource allocation precision improves, but the size and complexity of the control field increases

Engineering Contradiction:

Improveresource allocation precisionVSAvoidcontrol field size

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The control field is segmented into multiple independent parts: common control information, per-user control information, and resource allocation information. Each segment handles specific functions, allowing efficient resource allocation while maintaining structured organization. The segmentation enables the system to manage complex resource allocation in dense environments without overwhelming the control field structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies partial action by including only the necessary control information for each specific scenario. The control field includes common control information that applies to all users, and per-user control information that includes only the specific allocation details needed for each STA-RU pairing, avoiding unnecessary information and maintaining efficiency.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS10505691B2Method and apparatus for configuring frame unit comprising control field indicating data fields in wireless LAN system

Publication Date: 2019.12.10 LG ELECTRONICS INC

AI summary

Proposed is an example relating to a control field used in a PPDU of a wireless LAN system which supports a plurality of RUs. The PPDU comprises a plurality of SIG-B fields and a plurality of data fields. Each SIG-B field and each data field correspond to any one of a plurality of 20 MHz. Each of the plurality of data fields can be allocated or indicated by any one of the plurality of SIG-B fields. The mapping relationship between the data fields and the SIG-B fields can be indicated by a mapping rule. The mapping rule can be indicated by the SIG-B fields.