Wake-Up Radio Positioning Frames for Low-Power AMP Devices
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Solution Overview
Problem
Conventional cellular positioning systems face challenges in positioning ambient power (AMP) devices due to power consumption and cost constraints, making it impossible to use positioning reference signals with large bandwidth.
Innovation Solution
A transmitting-end device transmits a first positioning frame carrying a positioning signal to enable positioning of an AMP device, utilizing low-complexity frames like WUR PPDU to support AMP device positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference signal with large bandwidth is used in cellular positioning system, then positioning precision is improved, but power consumption and cost increase making it impossible for AMP devices
Solution Approach 1:
The patent uses a low-complexity wake-up radio (WUR) interface instead of a full cellular radio interface for positioning. The WUR uses a simplified frame structure (WUR PPDU) with reduced bandwidth requirements, allowing AMP devices to perform positioning with minimal power consumption. The positioning reference signal is transmitted through this low-power interface rather than through a full cellular connection.
Solution Approach 2:
The patent changes the operational parameters of the positioning system by using a reduced bandwidth configuration. The WUR interface operates with fewer subcarriers and a simplified frame structure compared to traditional cellular positioning, thereby reducing the power consumption while still enabling positioning functionality for AMP devices.
2Measurement precision
If positioning reference signal with large bandwidth is used, then positioning precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs a wake-up radio (WUR) interface which is a simplified, low-complexity radio designed specifically for wake-up and positioning purposes. This WUR uses a reduced frame structure (WUR PPDU) with fewer processing requirements compared to a full cellular radio, thereby reducing device complexity and cost while maintaining positioning capability.
Solution Approach 2:
The patent segments the radio functionality into two parts: a full cellular radio for general communication and a simplified wake-up radio (WUR) for positioning and wake-up functions. This segmentation allows the AMP device to use only the simple WUR for positioning, avoiding the complexity of using a full cellular radio interface.
3Use of energy by moving object
If AMP device uses low-complexity interface for positioning, then power consumption and cost are reduced, but positioning capability must be maintained
Solution Approach 1:
The patent uses a wake-up radio (WUR) interface which is designed to be simple and low-power. Despite its simplicity, the WUR maintains positioning capability by using a properly designed WUR PPDU frame structure that includes positioning reference signals, ensuring that positioning functionality is preserved even with reduced complexity.
Solution Approach 2:
The patent introduces a wake-up radio (WUR) as an intermediary interface between the AMP device and the positioning system. The WUR acts as a mediator that enables positioning functionality without requiring the full cellular radio interface, thus maintaining positioning capability while reducing power consumption and device complexity.
Data Source
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AI summary
A wireless communication method, a sending-end device and an AMP device. The method includes: a sending-end device sending a first positioning frame, wherein the first positioning frame carries a positioning signal, and the positioning signal is used for positioning an AMP device.