UWB Multi-Ranging Session Timing for Reliable Low-Power Synchronization
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Solution Overview
Problem
In ultra-wideband (UWB) communication, synchronizing multiple smartphones for ranging is challenging, leading to uncertain ranging success and excessive power consumption due to continuous standby reception attempts.
Innovation Solution
A method and system for controlling the ranging period in a multi-ranging session of UWB communication, where the ranging period is varied across sessions by adjusting the size of schedule blocks and dividing them into regions, to increase the probability of successful ranging and minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous standby reception attempts are made to synchronize multiple smartphones for ranging, then the probability of successful ranging may increase, but power consumption increases excessively
Solution Approach 1:
The patent implements periodic ranging attempts instead of continuous standby reception. The system divides time into discrete ranging periods with specific intervals, where ranging operations are performed only during allocated time slots. This periodic approach maintains synchronization opportunities while allowing the receiver to enter low-power states between ranging periods, thereby reducing overall power consumption while preserving ranging success probability.
Solution Approach 2:
The patent dynamically adjusts the ranging period and interval parameters based on system conditions and requirements. By making the ranging configuration adaptive rather than fixed, the system can optimize the balance between ranging success probability and power consumption according to actual operational needs, device states, and environmental factors.
2Productivity
If multiple smartphones are synchronized for simultaneous ranging, then ranging efficiency improves, but synchronization becomes virtually impossible
Solution Approach 1:
The patent segments the multi-smartphone ranging process into separate, sequential sessions rather than attempting true simultaneous operation. Each smartphone is assigned to a specific ranging session with dedicated time slots and resources. This segmentation approach maintains high ranging efficiency by processing multiple devices systematically while avoiding the insurmountable synchronization complexity of truly simultaneous multi-device operation.
Solution Approach 2:
The patent employs periodic ranging sessions with structured time division multiplexing. Each session is allocated specific time periods where particular smartphones perform ranging operations in an organized sequence. This periodic structure enables efficient multi-device handling through time-division resources while keeping synchronization requirements manageable and predictable.
3Reliability
If ranging period is extended to increase success probability, then more time is available for synchronization, but power consumption increases due to longer standby duration
Solution Approach 1:
The patent structures ranging operations as periodic events with defined periods and intervals rather than continuous operation. By concentrating ranging attempts into specific periodic time slots and enabling low-power states between periods, the system achieves adequate synchronization opportunities without requiring excessively long continuous standby durations, thus balancing success probability with time efficiency.
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
The method effectively increases the probability of successful ranging by optimizing the ranging period and reduces unnecessary power consumption by minimizing the number of failed ranging attempts.
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.