Infrastructure Controller Ranging Scheduling Signal Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing infrastructure access systems face challenges in reducing power consumption and avoiding collisions during ranging operations between infrastructure and keys, particularly when multiple keys are involved.
Innovation Solution
The infrastructure controller sends a ranging-scheduling-signal to the key, which includes timing information for a subsequent ranging operation. This allows the infrastructure to activate ranging nodes only at specific times, reducing power consumption and preventing signal collisions by using different RF frequency ranges for the ranging-scheduling-signal and the key-ranging-signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the infrastructure continuously activates ranging nodes to receive key-ranging-signals, then the reliability of receiving signals is improved, but the power consumption increases
Solution Approach 1:
The infrastructure controller activates ranging nodes periodically based on scheduled time slots rather than continuously. The controller sends activation signals at specific intervals corresponding to when keys are expected to transmit ranging signals, reducing power consumption while maintaining reliable signal reception during active periods.
Solution Approach 2:
The infrastructure controller pre-schedules ranging operations by sending ranging-scheduling-signals to keys before the actual ranging occurs. This allows the controller to activate ranging nodes in advance at precisely the right time, avoiding continuous activation and reducing overall power consumption while ensuring readiness for signal reception.
2Productivity
If the infrastructure activates ranging nodes for multiple keys simultaneously, then the productivity of handling multiple keys is improved, but signal collisions occur
Solution Approach 1:
The infrastructure controller divides the ranging operations for multiple keys into separate time slots. Each key is assigned a specific time window during which its ranging node is activated, segmenting the overall ranging process into discrete, non-overlapping intervals that prevent signal collisions while maintaining efficient multi-key handling.
Solution Approach 2:
The infrastructure controller dynamically adjusts the activation timing of ranging nodes based on scheduled operations for different keys. By flexibly controlling when each ranging node becomes active according to pre-coordinated time slots, the system achieves high productivity with multiple keys while avoiding collisions through adaptive time management.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An infrastructure-controller (106) for an infrastructure (102). The infrastructure-controller (106) configured to: send a ranging-scheduling-signal (110) to a key (104), wherein the ranging-scheduling-signal (110) comprises timing-information for a subsequent ranging operation; and activate one or more ranging nodes (112) associated with the infrastructure (102), for receiving a key-ranging-signal (113) from the key (104), at an infrastructure-node-start-ranging-time based on the timing-information. The ranging-scheduling-signal (110) has a frequency in a first RF frequency range. The key-ranging-signal (113) has a frequency in a second RF frequency range.