AMP Wi‑Fi Trigger Frames for Low-Power Uplink Communication
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Solution Overview
Problem
Current IEEE 802.11 protocols are not applicable to ambient power (AMP) IoT devices that do not have power or have low power, making it difficult to establish effective communication methods between AMP access points (AP) and non-AP stations (STA).
Innovation Solution
A method involving the transmission of a downlink physical layer protocol data unit (PPDU) with a spoofing preamble and trigger frame by the AMP AP to initiate a trigger-based uplink PPDU transmission from the AMP non-AP STA, utilizing bandwidths less than 20 MHz and on-off keying (OOK) format, with specific synchronization and control mechanisms to manage transmission opportunities and power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IEEE 802.11 protocols are used for communication, then communication standardization is achieved, but the protocol is not applicable to AMP IoT devices that do not have power or have low power
Solution Approach 1:
The patent modifies the IEEE 802.11 protocol parameters by removing the legacy preamble and adjusting the PPDU structure to accommodate AMP devices with different power capabilities, enabling the protocol to work with both powered and unpowered devices
Solution Approach 2:
The patent creates a universal communication framework that can handle multiple device types (AMP and non-AMP) using the same protocol structure, where the AP can distinguish and communicate with different STA types through modified trigger frames and recognition mechanisms
2Extent of automation
If downlink PPDU with spoofing preamble and trigger frame is transmitted, then uplink transmission is triggered, but bandwidth efficiency is reduced
Solution Approach 1:
The patent extracts and removes the legacy preamble from the PPDU structure, keeping only the necessary trigger frame and data portions, thereby reducing bandwidth overhead while maintaining the trigger-based uplink transmission functionality
Solution Approach 2:
The patent segments the PPDU into distinct functional parts (spoofing preamble, trigger frame, data portion) that can be selectively transmitted, allowing the system to optimize bandwidth usage by transmitting only necessary segments
3Use of energy by moving object
If AMP package uses OOK format, then power consumption is reduced, but synchronization complexity increases
Solution Approach 1:
The patent introduces a synchronization field as an intermediary element within the PHY header that facilitates reliable synchronization in OOK format without requiring complex external synchronization mechanisms, thereby maintaining low power consumption while managing synchronization complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient communication between AMP AP and STA devices, reducing collisions and power consumption, and allowing the use of IEEE 802.11 protocols for low-power or no-power AMP IoT devices.
Implementation Method 1
transmitting, by the AMP AP, a downlink (DL) physical layer protocol data unit (PPDU) to the AMP non-AP STA
Implementation Method 2
each of the AMP package uses an on-off keying (OOK) format
Data Source
AI summary
A method for performing communications between an ambient power (AMP) access point (AP) and an AMP non-AP station (STA) includes: transmitting, by the AMP AP, a downlink (DL) physical layer protocol data unit (PPDU) to the AMP non-AP STA, wherein the DL PPDU comprises a spoofing preamble and a trigger frame for triggering the AMP non-AP STA to perform a trigger-based (TB) uplink (UL) PPDU transmission; and receiving, by the AMP AP, a TB UL PPDU without any spoofing preamble from the AMP non-AP STA.