UWB Communication Node Dynamic Ranging Priority Scheduling
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Solution Overview
Problem
In ultra-wideband (UWB) communication systems, static scheduling priorities can lead to inefficient ranging session management, resulting in delayed access to external communication nodes, such as doors or vehicles, especially in systems with multiple nodes where sessions often collide or overlap, affecting user experience.
Innovation Solution
A communication node with a prioritization unit that dynamically adjusts ranging session priorities based on previously measured distances, using a scheduler to increase priority when approaching a node and decrease when moving away, and communicates these changes through the UWB communication unit, allowing for flexible scheduling and improved user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static scheduling priorities are used for ranging sessions, then device complexity is reduced and scheduling is simpler, but access delay increases and user experience deteriorates when multiple external nodes are involved
Solution Approach 1:
The patent implements dynamic prioritization where the priority of ranging sessions is adjusted in real-time based on measured distances to external communication nodes. The prioritization unit continuously monitors distance changes and modifies scheduling priorities accordingly, transforming the static scheduling system into a dynamic one that adapts to changing spatial conditions, thereby reducing access delay without requiring overly complex manual configuration
Solution Approach 2:
The system employs feedback mechanisms by using distance measurement results from previous ranging sessions to inform future scheduling decisions. The prioritization unit receives feedback about current distances to external nodes and adjusts session priorities based on this information, creating a closed-loop control system that automatically optimizes access timing without increasing operational complexity
2Loss of time
If dynamic prioritization based on distance measurements is implemented, then access delay is reduced and user experience improves, but device complexity and processing requirements increase
Solution Approach 1:
The ranging session management system performs self-service by automatically adjusting its own scheduling priorities based on measured distances. The prioritization unit autonomously monitors distance changes and modifies session priorities without requiring external intervention or complex user configuration, reducing the perceived complexity for users while maintaining dynamic optimization capabilities
Solution Approach 2:
The system performs preliminary actions by pre-calculating and pre-adjusting priorities based on predicted distance changes. By using distance trends from previous measurements, the prioritization unit can proactively adjust scheduling before collisions occur, reducing access delay while smoothing out processing demands rather than reacting to conflicts after they arise
3Productivity
If ranging sessions are managed without dynamic prioritization, then energy consumption is lower and processing overhead is reduced, but session collision increases and productivity decreases
Solution Approach 1:
The prioritization unit applies partial action by selectively adjusting priorities only for ranging sessions that are at risk of collision or have high importance, rather than continuously re-evaluating all sessions. This targeted approach increases productivity for critical sessions while minimizing unnecessary processing overhead and energy consumption for sessions that don't require optimization
Solution Approach 2:
The system changes the priority parameter dynamically based on distance measurements, allowing the same hardware and processing resources to achieve higher productivity. By modifying the scheduling parameter (priority value) rather than adding more processing capacity, the system improves ranging session throughput without proportionally increasing energy consumption or hardware complexity
Data Source
AI summary
In accordance with a first aspect of the present disclosure, a communication node is provided, comprising: an ultra-wideband (UWB) communication unit configured to enable UWB communication with a plurality of external communication nodes; a processing unit configured to perform ranging sessions between the communication node and said external communication nodes, wherein said ranging sessions comprise one or more distance measurements based on messages exchanged through the UWB communication unit between the communication node and said external communication nodes; and a prioritization unit configured to prioritize said ranging sessions in dependence on at least one previously measured distance between the communication node and the respective external communication nodes. In accordance with a second aspect of the present disclosure, a method of operating a communication node is provided. In accordance with a third aspect of the present disclosure, a computer program is provided, comprising executable instructions for carrying out said method.