Non-Trigger-Based Ranging Timing Parameter Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication technologies face limitations in ranging sensitivity, particularly in data decode sensitivity, which affects the accuracy of distance measurement between wireless devices.
Innovation Solution
A non-trigger-based ranging protocol is introduced, where wireless devices negotiate timing parameters for ranging measurements, allowing for power savings and accounting for processing and storage limitations, enabling more precise distance estimation between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing wireless communication technologies are used for ranging, then basic distance measurement can be achieved, but ranging sensitivity is bounded by data decode sensitivity which limits measurement precision
Solution Approach 1:
The patent changes the timing parameters for ranging measurements by introducing delayed LMR transmission and flexible measurement scheduling. The responding station can delay the LMR transmission time based on processing requirements, and the initiating station can schedule subsequent measurements at optimized intervals. This parameter optimization allows the system to achieve better ranging sensitivity without being constrained by traditional data decode sensitivity limits.
2Measurement precision
If frequent ranging measurements are performed to improve measurement precision, then distance estimation accuracy increases, but power consumption increases
Solution Approach 1:
The patent implements dynamic measurement scheduling where the timing between consecutive ranging measurements is flexible and adaptable. The initiating station can determine optimal measurement intervals based on current needs, and the responding station can adjust its availability windows dynamically. This dynamic approach allows the system to perform frequent measurements when high precision is needed while reducing power consumption during periods when measurements can be spaced out.
Solution Approach 2:
The patent optimizes power efficiency by allowing the responding station to set minimum and maximum times between measurements based on its processing capabilities and power constraints. The initiating station receives these parameter constraints and schedules measurements accordingly, changing the measurement frequency parameter to balance precision requirements with power consumption limitations.
3Loss of time
If the responding station processes timestamps immediately to reduce latency, then measurement response time decreases, but processing requirements and storage needs increase
Solution Approach 1:
The patent allows the responding station to delay LMR transmission until it has had sufficient time to process timestamps and prepare accurate measurements. This preliminary processing action ensures that the station is ready to provide accurate ranging data without being forced to respond immediately with potentially incomplete processing. The initiating station accommodates this delayed response by scheduling subsequent measurements at appropriate intervals.
Data Source
Figure 1A~1B
Figure 1C
Figure 2
AI summary
Methods for performing a ranging procedure according to the non-trigger-based protocol may include negotiating timing parameters associated with the ranging procedure, performing a ranging measurement, and transmitting/receiving, after completion of the ranging measurement, a message announcing initiation of another ranging measurement. The timing parameters may indicate a time window in which an initiating device can initiate a subsequent ranging measurement and the message announcing initiation of the second ranging measurement may be received during the time range specified. Timing parameters may indicate a responding device's required minimum and maximum time between ranging measurements. Additional parameters may indicate an initiating device's required minimum and maximum time between ranging measurements. A power savings mode may be entered after the first ranging measurement and during at least a portion of a time period specified by the parameters.