NAN Ranging Protocol for Direct Peer-to-Peer Wireless Synchronization
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Solution Overview
Problem
Current wireless communication systems, particularly in WLANs based on the IEEE 802.11 standard, face challenges in efficiently performing ranging procedures between peer devices, especially in scenarios with many stations, as existing protocols like FTM do not scale well and require intermediate access points, limiting direct peer-to-peer communication and synchronization.
Innovation Solution
The implementation of Neighbor Awareness Networking (NAN) ranging protocols that allow direct communication between wireless stations without an intermediate access point, enabling peer-to-peer synchronization and ranging through scheduling and parameter exchange, using techniques like fine timing measurement (FTM) adapted for NAN frameworks to determine distances between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing FTM protocols are used for ranging procedures, then ranging functionality is provided, but scalability is poor and intermediate access points are required
Solution Approach 1:
The patent extracts the ranging functionality from the traditional FTM protocol framework that requires access points, enabling direct peer-to-peer ranging between wireless stations. The NAN ranging procedure allows stations to perform ranging independently without relying on intermediate access points, thus removing the complexity while maintaining ranging capability.
Solution Approach 2:
Wireless stations perform ranging procedures autonomously through direct peer-to-peer communication. Each station can initiate and complete ranging operations with neighboring stations independently, without requiring service from intermediate access points, enabling the system to serve itself.
2Adaptability or versatility
If direct peer-to-peer communication is implemented, then communication flexibility is improved, but synchronization difficulty increases
Solution Approach 1:
The patent implements periodic discovery windows and scheduled communication slots that enable wireless stations to synchronize their operations. By establishing regular periodic intervals for discovery and ranging activities, stations can maintain synchronization while enjoying the flexibility of direct peer-to-peer communication.
Solution Approach 2:
Wireless stations perform preliminary synchronization and parameter exchange before engaging in direct peer-to-peer communication. The NAN framework establishes timing and frequency agreements in advance, allowing stations to synchronize their operations before actual data transmission begins.
3Productivity
If NAN ranging procedure is implemented, then scalability is improved, but communication overhead increases
Solution Approach 1:
The patent merges multiple functions into the NAN ranging procedure, including discovery, synchronization, and ranging measurements in a single integrated framework. By combining these functions, the system achieves scalable peer-to-peer ranging while reducing redundant communication overhead that would occur if separate procedures were used.
Solution Approach 2:
The NAN framework provides a universal ranging procedure that can be applied across different wireless station configurations and scenarios. This multi-functional approach allows the same procedure to handle various ranging requirements, reducing the need for multiple specialized protocols and thereby reducing overall communication overhead.
Data Source
AI summary
One or more wireless stations may operate to configure Neighbor Awareness Networking (NAN)—direct communication with neighboring wireless stations, e.g., without utilizing an intermediate access point. Scheduling of NAN ranging procedures may include a first wireless station sending first information, including first scheduling preferences and a first ranging role, to a second wireless station. The first wireless station receives second information, including second scheduling preferences and a second ranging role, from the second wireless station. The first wireless station may initiate the ranging procedure based on the scheduling preferences and ranging parameters. Alternatively, the second wireless station and may initiate the ranging procedure based on the scheduling preferences and ranging parameters.