BLE Air-Time Coordination Between Piconets to Prevent Clashes
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Solution Overview
Problem
In Bluetooth Classic or Bluetooth Low Energy (LE) networks, multiple central devices coexisting in piconets often experience air-time clashes due to frequency and time interference, leading to degraded performance, increased power consumption, and higher latency, which existing wired communication methods like cabling are expensive and not scalable.
Innovation Solution
A Bluetooth Low Energy (BLE) based wireless network is established among central devices to exchange information about air-time usage, including channel maps and slot availability masks, using mechanisms like advertising-based mesh, connected mesh, and periodic advertising with response (PAwR) protocols to coordinate air-time usage and reduce clashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple central devices operate independently in Bluetooth piconets, then each device can maintain its own communication autonomy, but air-time clashes occur leading to degraded performance and higher power consumption
Solution Approach 1:
The patent introduces an air-time coordination mechanism as an intermediary layer between independent central devices. This mechanism allows devices to maintain operational autonomy while coordinating their air-time usage through standardized protocols, preventing clashes without requiring direct device-to-device negotiation or centralized control.
Solution Approach 2:
The patent implements feedback loops where central devices monitor air-time usage patterns, detect potential clashes, and adjust their transmission schedules accordingly. This feedback mechanism enables autonomous devices to adapt their behavior dynamically, resolving performance degradation caused by air-time conflicts while preserving communication independence.
2Reliability
If wired communication methods are used to coordinate air-time usage, then coordination reliability improves, but cost increases and scalability decreases
Solution Approach 1:
The patent replaces physical wired communication mechanisms with wireless Bluetooth Low Energy (BLE) communication for air-time coordination. This substitution eliminates the need for physical cabling while maintaining reliable coordination through standardized wireless protocols, thereby reducing cost and improving scalability without sacrificing coordination reliability.
Solution Approach 2:
The patent leverages the universal Bluetooth Low Energy protocol to enable air-time coordination across diverse central devices. By using a universally supported wireless communication standard rather than device-specific wired connections, the system achieves both reliability and scalability, allowing easy integration of additional devices without increasing complexity or cost.
3Reliability
If air-time coordination mechanisms are implemented, then air-time clash probability decreases, but system complexity increases
Solution Approach 1:
The patent segments the air-time coordination function into distinct, modular components including air-time monitoring modules, conflict detection modules, and schedule adjustment modules. This segmentation allows each component to perform a specific function independently, reducing overall system complexity while achieving reliable air-time coordination through standardized interfaces between modules.
Data Source
AI summary
Disclosed are techniques to setup and use a BLE based wireless network between central devices of multiple piconets to exchange information to coordinate air-time usage by the piconets of the central devices. The information exchanged may include channel maps that indicate frequency channels that are available for use by the respective piconets, slot availability masks that indicate future air-time slots for use by the respective piconets based on a common time reference, and other meta information used to coordinate regulation of air-time usage. The multiple central devices may collaboratively regulate their respective air-time usage based on the exchanged information to reduce the potential for air-time clash. In one aspect, the central devices may use the periodic advertising with response (PAwR) protocol in BLE to exchange future air-time usage information. The timing of periodic advertising packets may provide a time reference for the multiple central devices to coordinate their air-time usage.