Proximity Wi-Fi Peer-to-Peer Clock Synchronization
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Solution Overview
Problem
Current Wi-Fi systems face challenges in direct communication between devices without intermediate infrastructure, particularly in coordinating clocks and establishing peer-to-peer connections efficiently, leading to limitations in communication range and reliability.
Innovation Solution
The implementation of proximity Wi-Fi technology, which enables devices to communicate directly with peer Wi-Fi devices within radio range using bilateral pairwise clock coordination, allowing for independent operation without external infrastructure, and includes methods for timestamp synchronization and receiver map management to facilitate communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Wi-Fi devices communicate directly without intermediate access point, then communication independence and reduced infrastructure dependence are improved, but clock synchronization complexity and coordination difficulty increase
Solution Approach 1:
The patent introduces a gateway device as an intermediary between the direct Wi-Fi peer-to-peer communication and the external network infrastructure. The gateway performs clock synchronization with external time sources and translates timestamps between different time references, thereby reducing the synchronization complexity for direct communicating devices while maintaining communication independence.
Solution Approach 2:
The system segments the communication function into two parts: direct peer-to-peer communication for data transmission (improving independence) and gateway-mediated clock synchronization for time coordination (reducing complexity). This segmentation allows devices to benefit from both direct communication and simplified time synchronization.
2Reliability
If bilateral pairwise clock coordination is implemented, then communication reliability is improved, but device complexity and coordination overhead increase
Solution Approach 1:
Each Wi-Fi device independently maintains its own clock and generates timestamps based on its local time reference. Devices autonomously perform clock coordination by exchanging timestamps and calculating time offsets without requiring complex centralized coordination, thereby improving reliability while limiting complexity to individual device operations.
Solution Approach 2:
The gateway acts as a time reference intermediary that provides stable time synchronization to multiple devices. Instead of every device coordinating with every other device (which would create O(n²) coordination overhead), the gateway serves as a common time reference point, reducing coordination complexity to O(n) while maintaining communication reliability.
3Measurement precision
If timestamp synchronization methods are used, then communication accuracy is improved, but processing requirements and computational overhead increase
Solution Approach 1:
The system implements timestamp synchronization only for the specific purpose of coordinating communication timing, rather than full clock synchronization. Devices exchange timestamps in communication packets and use them to adjust their communication schedules, providing sufficient accuracy for coordination without the computational overhead of complete time synchronization algorithms.
Solution Approach 2:
The gateway serves as a central time reference that provides pre-synchronized timestamps to communicating devices. Instead of devices performing complex mutual time synchronization calculations, they simply use the gateway-provided timestamps, significantly reducing their processing requirements while maintaining synchronization accuracy.
Data Source
AI summary
In embodiments, one or more wireless stations operate to configure direct communication with neighboring mobile stations, i.e., direct communication between the wireless stations without utilizing an intermediate access point. Embodiments of the disclosure relate to an architecture to implement proximity Wi-Fi communications, including, architecture design, timing and clock management, communication protocols, including discovery, device addressing, and termination, as well as security.