Ad-hoc UWB Time Slot Assignment for Collision Prevention
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Solution Overview
Problem
Conventional UWB communication systems face inefficiencies due to signal collisions and low communication success rates, especially as the number of devices increases, with mechanisms like ALOHA being ineffective in fully utilizing available airtime.
Innovation Solution
An ad-hoc UWB communication method is introduced, utilizing a time frame with assignable time slots for each device to transmit and receive data, preventing signal collisions without the need for a central server, allowing devices to communicate effectively by managing their transmissions within predetermined time slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ALOHA mechanism is used for UWB signal transmission, then devices can transmit without coordination, but signal collision increases and communication success rate decreases as the number of devices increases
Solution Approach 1:
The patent segments the transmission medium by dividing time into discrete time slots and assigning each device a specific time slot for transmission. This temporal segmentation prevents signal collisions by ensuring that only one device transmits at any given time slot, thereby maintaining high communication success rates even as the number of devices increases.
2Ease of operation
If ALOHA mechanism is used, then transmission coordination is simple, but airtime utilization is low with only 18% utilization for 97% success rate
Solution Approach 1:
The patent implements dynamic time slot assignment where the coordinator device can allocate and reassign time slots based on current network conditions and device activity. This dynamic approach allows the system to adapt to varying traffic patterns, maximizing airtime utilization while preventing collisions through controlled access.
3Reliability
If a central server is deployed to coordinate transmissions, then signal collision is prevented, but system complexity and infrastructure requirements increase
Solution Approach 1:
The patent implements a self-organizing ad-hoc network where one of the UWB devices automatically assumes the role of coordinator through contention-based access. This selected device then manages time slot assignment for other devices without requiring external infrastructure. The system self-configures and manages itself, eliminating the need for centralized servers while maintaining collision-free transmissions.
Data Source
AI summary
The present disclosure provides a method of transmitting and receiving data between devices via an ad-hoc wireless communication network. The ad-hoc wireless network uses a time frame having time slots, each of the time slots is assignable to one of the devices so that a device assigned to a time slot transmits and receives the data at the assigned time slot. The present disclosure also provides that the time frame is created by one of the devices.