Dynamic Backscatter Anchor Selection for Wireless Positioning
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Solution Overview
Problem
The deployment of zero power consumption devices as anchors for positioning can lead to mutual interference between back scattering signals, affecting positioning accuracy and increasing computational complexity due to an uncontrolled number of anchor devices.
Innovation Solution
A method and device to control the number of anchor devices participating in positioning via back scattering communication by adjusting transmission power, transmitting control signaling, or scheduling pre-identified devices, using carrier signals for modulation and indicating signal strength or feature information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of anchor devices for positioning is increased, then positioning accuracy is improved, but mutual interference between back scattering signals increases and system complexity increases
Solution Approach 1:
The patent implements dynamic control of anchor device participation in positioning through multiple mechanisms: adjusting transmission power of carrier signals, transmitting control signaling to indicate signal strength thresholds, and scheduling pre-identified anchor devices. This dynamic approach allows the system to adapt the number of participating anchor devices based on current positioning requirements and signal conditions, resolving the contradiction between needing enough anchors for accuracy while avoiding excessive interference
Solution Approach 2:
The patent changes key parameters including transmission power levels of carrier signals, signal strength thresholds for anchor device participation, and scheduling configurations. By adjusting these parameters, the system can control which anchor devices participate in back scattering communication, thereby managing the balance between positioning accuracy and signal interference
2Measurement precision
If the number of anchor devices for positioning is increased, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The system dynamically schedules pre-identified anchor devices based on positioning requirements and signal conditions. This dynamic scheduling mechanism allows the system to select an optimal subset of anchor devices for each positioning operation, avoiding the complexity of processing signals from all available anchors while maintaining positioning accuracy through selective participation
Solution Approach 2:
The patent applies partial action by selecting only the necessary number of anchor devices for positioning rather than using all available anchors. Through control signaling that indicates signal strength thresholds and scheduling of pre-identified devices, the system uses a partial set of anchor devices that is sufficient for achieving positioning accuracy without incurring the full complexity of processing all possible anchor signals
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
Reduces mutual interference and complexity while maintaining positioning accuracy by selectively engaging a controlled number of anchor devices, and increasing their number when needed to meet positioning requirements.
Implementation Method 1
the carrier signal is used to generate a back scattering signal via modulation
Data Source
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AI summary
Provided in the embodiments of the present application are a wireless communication method and device. The present invention can reduce the number of anchor devices that perform backscatter communication while meeting the positioning precision requirement, reduce mutual interference between backscatter signals, and reduce the complexity of positioning processing. The wireless communication method comprises: a first device executing a first operation to control the number of anchor devices participating in positioning of a target device by means of backscatter communication, wherein the first operation is at least one of the following: adjusting the transmission power of a carrier signal, sending first control signaling, and scheduling some or all pre-identified anchor devices; and wherein the carrier signal is used to generate a backscatter signal by means of modulation, and the first control signaling is used to indicate signal strength information of the carrier signal when the anchor devices participating in positioning of the target device perform backscattering, or the first control signaling is used to indicate feature information of the anchor devices participating in positioning of the target device.