AMP PPDU Preamble Structure for Low-Power IoT Communication

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Solution Overview

Problem

The design of dedicated PPDUs for ambient power-enabled IoT devices (AMP devices) is urgently needed due to their low complexity, low power consumption, and maintenance-free characteristics, which are essential for large-scale deployment in harsh environments and ultra-compact, ultra-low-cost applications.

Innovation Solution

A method for wireless communication that includes transmitting a first PPDU with a specific preamble part and AMP part to AMP devices, allowing differentiation through unique modulation schemes and synchronization sequences, enabling efficient communication without active transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dedicated PPDUs are designed for AMP devices, then communication effectiveness with AMP devices is improved, but device complexity increases

Engineering Contradiction:

Improvecommunication effectivenessVSAvoidPPDU structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The PPDU is segmented into distinct parts: a legacy preamble part that all devices can process, and an AMP-specific part containing synchronization sequences and data fields. This segmentation allows AMP devices to receive dedicated communication while non-AMP devices can ignore the AMP-specific portion, resolving the contradiction between communication effectiveness and device complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The legacy preamble part serves multiple functions: it enables non-AMP devices to decode and recognize the packet structure, provides basic synchronization, and allows AMP devices to identify packets intended for them. This multi-functionality reduces the need for completely separate communication protocols, thereby limiting complexity increase.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Use of energy by moving object

If AMP devices use energy harvesting and backscatter technology, then power consumption is reduced, but communication capability is limited

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication capability

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

AMP devices harvest energy from received radio frequency signals and use this energy to power their backscatter communication transceivers. The same received signal that provides power also carries the communication protocol, eliminating the need for separate power and communication channels and enabling communication with minimal external power infrastructure.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The legacy preamble acts as an intermediary that non-AMP devices can fully process while AMP devices use to harvest energy and identify targeted packets. This intermediary structure enables AMP devices to communicate using backscatter technology without requiring complex transmitters, as they only need to modulate the reflected signal based on packets they've already received and energized.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260025445A1Method for wireless communication

Publication Date: 2026.01.22 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided is a method for wireless communication. The method for wireless communication includes transmitting, by a network device, a first physical layer protocol data unit (PPDU), wherein the first PPDU comprises a first preamble part and an ambient power (AMP) part, wherein the first PPDU is a PPDU transmitted to an AMP device.