UWB Multi-Session Ranging with Conflict-Free Response Slots
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Solution Overview
Problem
Existing UWB communication systems face issues with measurement accuracy, resolution, channel capacity, and communication capability, particularly in multi-session ranging interactions due to time slot conflicts and inefficient scheduling, leading to increased power consumption and ranging failures.
Innovation Solution
A UWB communication method that includes sending ranging start frames with session-specific measurement parameters, allocating response time slots, and using information security processing to manage multiple sessions, thereby reducing conflicts and improving measurement efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple second devices transmit response frames simultaneously in the same time slot, then channel capacity is improved, but time slot conflicts occur leading to ranging failures
Solution Approach 1:
The patent segments the response transmission process by allocating dedicated response time slots to different second devices. The first device sends ranging start frames to multiple second devices and assigns each device specific time slots for responding, thereby preventing simultaneous transmissions and eliminating time slot conflicts while maintaining multi-device channel capacity.
2Reliability
If response time slots are allocated for each second device, then time slot conflicts are reduced, but device complexity increases due to scheduling requirements
Solution Approach 1:
The patent applies preliminary action by pre-allocating response time slots to different second devices before the actual ranging interaction begins. The first device determines and communicates the time slot allocation to each second device in advance through ranging start frames, simplifying the scheduling process during actual operation and reducing real-time computational complexity.
3Use of energy by moving object
If power consumption is reduced by optimizing time slot allocation, then energy efficiency improves, but measurement accuracy may be compromised
Solution Approach 1:
The patent implements periodic action by organizing ranging interactions into structured time slots with clear periodic intervals. Devices transmit and receive signals only during their allocated time slots, enabling power saving during idle periods while ensuring measurement accuracy is maintained through proper timing synchronization and sufficient signal exchange intervals within each time slot.
Data Source
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AI summary
The embodiments of the present disclosure disclose a method, a device, and a system for UWB communication. The UWB communication method includes: sending a ranging start frame to a plurality of second devices; receiving response frames from the plurality of second devices in a plurality of response time slots; sending a ranging end frame to the plurality of second devices; where each of the second devices maintains at least two sessions with the first device. The embodiments of the present disclosure optimize UWB ranging interactions under a plurality of sessions.