Cascade Time Synchronization for Wireless Data Flow
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Solution Overview
Problem
Wireless networks face challenges in synchronizing devices with varying clock speeds, leading to delays and interference, especially in complex scatternet topologies where data delivery is not optimized, causing packets to be lost and data to arrive at different times, which is critical in applications requiring simultaneous measurements or data delivery.
Innovation Solution
Implementing techniques for accurate clock synchronization and frequency multiplexing in wireless networks, using cascade time synchronization and staged communication windows to minimize delays and reduce interference, allowing devices to synchronize their clocks based on periodic communications and adjust their timing to ensure simultaneous data collection and delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices use independent clocks in wireless networks, then each device can operate autonomously, but time synchronization deteriorates causing data delivery delays
Solution Approach 1:
The patent divides the time synchronization process into segments: a reference device establishes a time reference, and other devices synchronize independently to this reference through periodic communications. This segmentation allows device autonomy while achieving synchronization without requiring a centralized clock control system.
Solution Approach 2:
The patent implements feedback mechanisms where devices exchange timing information periodically, and the reference device adjusts the time reference based on observed deviations. This feedback loop enables continuous synchronization correction, ensuring data delivery timing accuracy while maintaining device independence.
2Productivity
If devices communicate simultaneously in scatternet topologies, then communication efficiency improves, but interference increases causing packet loss
Solution Approach 1:
The patent employs periodic time windows for data transmission, where devices are allocated specific time slots within periodic cycles. This periodic structure enables multiple devices to communicate simultaneously without interference by ensuring that only designated devices transmit during their allocated windows, resolving the conflict between communication efficiency and interference reduction.
3Measurement precision
If clock synchronization accuracy is improved, then data delivery timing is precise, but system complexity increases
Solution Approach 1:
The patent implements self-service synchronization where each device autonomously adjusts its own timing based on received reference signals and observed deviations. The reference device automatically updates the time reference without external intervention, and other devices independently synchronize to this reference. This self-service approach achieves high synchronization accuracy while minimizing system complexity by eliminating the need for centralized synchronization management.
Data Source
AI summary
Implementations disclosed describe techniques and systems to facilitate efficient operations of wireless networks organized in a topology of communicating nodes. Techniques include cascade synchronization of various nodes of the network by generating and maintaining a common time using times associated with ordered communications between nodes. The common time maintained by the network allows performance of synchronous action for precise industrial, medical, and testing applications. The described techniques and systems further include management of communication windows between different nodes in a way that facilitates fast and efficient propagation of data collected by the network from multiple source nodes to one or more destination nodes. The techniques further include efficient assignment and flexible management of communication frequencies (channels) to various nodes of the network to reduce interference and noise by assigning different communication frequencies to the nodes that utilize concurrent communications windows.