Dual-PLL UWB Ranging Node for Interleaved Session Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
UWB ranging sessions suffer from reduced scheduler throughput and accuracy due to limitations in existing protocols that restrict the number of sessions that can be scheduled within a given time, leading to inefficiencies and inaccuracies in distance measurements.
Innovation Solution
Implementing a dual PLL system for parallel, time-shifted session scheduling, allowing interleaved ranging sessions on different communication channels, which reduces the delay between sessions to a half communication slot length, enabling more compact scheduling and accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sequential ranging session scheduling is used, then protocol compliance is maintained, but scheduler throughput is reduced and measurement accuracy deteriorates
Solution Approach 1:
The patent segments the ranging session scheduling into interleaved slots within a single communication slot, allowing multiple ranging sessions to be scheduled concurrently rather than sequentially. This segmentation enables the system to maintain protocol compliance while increasing throughput and accuracy by dividing the scheduling into manageable time-interleaved portions.
Solution Approach 2:
The patent implements periodic action by using time-interleaved scheduling where ranging sessions are arranged in periodic slots within a communication slot. This periodic structure allows multiple sessions to be executed in an organized manner, improving throughput while maintaining the timing requirements for accurate measurements.
2Productivity
If more ranging sessions are scheduled within a given time, then productivity increases, but session scheduling complexity increases
Solution Approach 1:
The patent applies dynamics by making the scheduling structure adaptive and flexible. The time-interleaved approach allows the system to dynamically allocate slots for different ranging sessions within a communication slot, enabling higher productivity while managing complexity through structured flexibility rather than rigid sequential scheduling.
Solution Approach 2:
The patent introduces another dimension to the scheduling problem by using time-interleaved slots within a single communication slot. Instead of scheduling sessions one after another in a single dimension, the system uses multiple time slots within the same communication window, effectively adding a temporal dimension that increases throughput without proportionally increasing complexity.
3Loss of time
If sequential scheduling is used, then implementation simplicity is maintained, but delay between ranging sessions increases
Solution Approach 1:
The patent applies preliminary action by pre-arranging time-interleaved slots for multiple ranging sessions within a single communication slot. This preliminary structuring reduces the delay between sessions by having all slots predetermined and ready, while maintaining implementation simplicity through a structured approach that doesn't require complex real-time scheduling decisions.
Data Source
AI summary
Aspects of the present disclosure provide a dual phase-locked loop (PLL) system configured to execute parallel, time shifted ranging session scheduling even if the sessions use different communication channels. Using techniques described herein, in some embodiments, a delay between ranging sessions is reduced compared to other UWB session scheduling implementations, which allows for more compact scheduling and often more accurate measurements as a result.