NAN Synchronization Beacon Coordination for Wi-Fi Direct
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Solution Overview
Problem
Current wireless communication systems, particularly Wi-Fi networks, face challenges in the setup and coordination of direct communication between mobile stations without an intermediate access point, leading to inefficiencies in synchronization and data transmission.
Innovation Solution
Implementing a mechanism for peer wireless stations to solicit and transmit synchronization beacons using Neighbor Awareness Networking (NAN) protocols, allowing direct communication and cluster management through synchronization and discovery beacons, enabling efficient peer-to-peer data sessions and cluster transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If peer wireless stations establish direct communication without an intermediate access point, then communication efficiency and setup speed are improved, but synchronization coordination becomes more difficult and unreliable
Solution Approach 1:
The patent introduces a pseudo-random delay mechanism as an intermediary coordination method. When multiple stations simultaneously request synchronization beacons, each station calculates a unique delay based on its MAC address and the beacon interval. This mediator mechanism prevents synchronization conflicts and ensures reliable coordination without requiring complex centralized control, thus maintaining reliability while enabling direct peer-to-peer communication.
2Measurement precision
If synchronization beacons are transmitted frequently to maintain synchronization, then synchronization accuracy is improved, but energy consumption and network overhead increase
Solution Approach 1:
The patent implements periodic synchronization beacon transmission at predetermined intervals rather than continuous transmission. Stations transition between active and sleep states periodically, waking only to transmit or receive synchronization beacons. This periodic action maintains synchronization accuracy by ensuring regular updates while dramatically reducing energy consumption compared to continuous transmission, as stations can power down their radios between periodic intervals.
3Reliability
If multiple wireless stations simultaneously request synchronization beacons, then synchronization coverage is improved, but transmission conflicts and coordination overhead increase
Solution Approach 1:
The patent applies local quality by making each station's delay calculation unique based on its individual MAC address. Instead of using a uniform delay for all stations, each station computes its specific backoff period locally using its own identifier and the beacon interval parameters. This local differentiation eliminates transmission conflicts without requiring centralized coordination, as each station independently determines its transmission timing based on its local characteristics, thus improving coverage while reducing coordination overhead.
Data Source
AI summary
In some embodiments, one or more wireless stations operate to configure direct communication with neighboring mobile stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. Embodiments of the disclosure relate to a mechanism for a device to request synchronization assistance from one or more neighboring peer devices.