UWB Multi-Session Ranging Period Control for Lower Power
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Solution Overview
Problem
In ultra-wideband (UWB) communication, synchronizing multiple smartphones for ranging is challenging, leading to high power consumption due to continuous standby attempts with uncertain success, resulting in low ranging success rates and excessive power usage.
Innovation Solution
The method involves defining multiple sessions with varying schedule block sizes and regions for each session, allowing for adaptive ranging attempts with UWB signals, thereby optimizing the ranging period to minimize power consumption and increase success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous ranging attempts are made with multiple smartphones, then the probability of successful ranging is improved, but power consumption increases significantly
Solution Approach 1:
The patent segments the ranging process into multiple sessions, each containing multiple schedule blocks. Instead of continuous ranging attempts, the system divides the operation into discrete time slots (schedule blocks) with specific structures including guard periods and ranging attempt periods. This segmentation allows the system to control power consumption by activating ranging functions only during designated time slots rather than continuously.
Solution Approach 2:
The patent implements periodic ranging attempts through structured sessions and schedule blocks with specific time allocations. Each session contains multiple schedule blocks with guard periods followed by ranging attempt periods. This periodic structure enables the system to attempt ranging at intervals rather than continuously, reducing power consumption while maintaining ranging success probability through multiple scheduled opportunities.
2Use of energy by moving object
If multiple sessions with varying schedule block sizes are used, then power consumption is reduced, but system complexity increases
Solution Approach 1:
The patent employs dynamic schedule block structures where the number and size of schedule blocks vary across different sessions. Each session can have a different number of schedule blocks (e.g., first session has multiple small blocks, second session has fewer larger blocks). This dynamic adaptation allows the system to optimize power consumption for each session while managing complexity through predefined session templates that guide the varying structures.
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
This approach reduces unnecessary power consumption and enhances the probability of successful ranging by adjusting the schedule block lengths across sessions, achieving half the power consumption while maintaining the same success rate as traditional methods.
Implementation Method 1
the distance between communication subjects is calculated by multiplying the signal arrival time between communication subjects by the speed of light with the use of Time of Flight (ToF) technology
Data Source
AI summary
A method and system for controlling a ranging period of a multi-ranging session of ultra-wideband (UWB) communication, the method including defining a setup including multiple sessions in an ultra-wideband (UWB) communication, allotting and dividing a plurality of schedule blocks in a first session, the first session allotting and dividing including attempting a ranging by incorporating a first UWB signal into a first region for each schedule block and allotting and dividing one or more schedule blocks in an n-th session (n>1), wherein the n-th session allotting and dividing includes attempting a ranging by incorporating an n-th UWB signal.