Wireless Positioning Signals Across Multiple Frequency Resources
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Solution Overview
Problem
Conventional cellular positioning systems face challenges in using large-bandwidth positioning reference signals due to power consumption and cost limitations, making it difficult to measure Reference Signal Time Difference (RSTD) or Rx-Tx time difference for positioning with ambient power (AMP) devices.
Innovation Solution
AMP devices send reference signals on multiple frequency domain resources to determine their position or the position of a receiving end device, or to measure the distance between them, utilizing phase features of these signals for accurate positioning and ranging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large-bandwidth positioning reference signals are used to measure RSTD or Rx-Tx time difference for positioning, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
The patent changes the parameter of bandwidth by using multiple frequency domain resources instead of a single large-bandwidth signal. This allows the system to achieve positioning functionality while operating with smaller bandwidth segments, thereby reducing power consumption for AMP devices that cannot support high-power large-bandwidth transmissions.
Solution Approach 2:
The positioning reference signal is segmented into multiple frequency domain resources rather than using a single large-bandwidth signal. Each frequency domain resource carries a portion of the positioning information, and the receiving end combines measurements from multiple segments to achieve accurate positioning without requiring high power consumption.
2Measurement precision
If large-bandwidth positioning reference signals are used to measure RSTD or Rx-Tx time difference for positioning, then positioning accuracy is improved, but device cost increases
Solution Approach 1:
The patent changes the bandwidth parameter from a single large-bandwidth signal to multiple smaller frequency domain resources. This reduces the requirements for high-performance (and high-cost) hardware components in AMP devices, making positioning functionality accessible to low-cost devices.
Solution Approach 2:
The patent enables positioning functionality in low-cost AMP devices by using multiple frequency domain resources instead of requiring expensive large-bandwidth signal support. This makes positioning accessible to devices with limited hardware capabilities and lower manufacturing costs.
3Measurement precision
If phase features of reference signals on multiple frequency domain resources are used for positioning, then positioning accuracy is improved, but signal processing complexity increases
Solution Approach 1:
The reference signal is divided into multiple frequency domain resources, and the receiving end performs separate phase measurements on each segment. This segmentation allows for more accurate phase difference measurements compared to a single large-bandwidth signal, while the processing complexity is managed by handling multiple smaller, independent frequency segments.
Data Source
AI summary
A wireless communication method and a device are provided. The method includes that an ambient power device sends a reference signal on a plurality of frequency domain resources. The reference signal sent on the plurality of frequency domain resources is used for at least one of the following: determining the location of the AMP device or a receiving end device of the reference signal, or determining the distance between the AMP device and the receiving end device of the reference signal.