Bluetooth Low Energy Advertising Channel Set Adaptation
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Solution Overview
Problem
Current Bluetooth Low Energy (BLE) technology cannot modify the advertising channel set to mitigate interference at the band edge, limiting advertisement efficiency and device discovery reliability.
Innovation Solution
A method and apparatus that recognize interference in the primary advertising channel set and transmit control messages to update the channel set, either by adding an additional channel or replacing the interfering channel with a data channel, to maintain efficient advertisement and scanning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the primary advertising channel set is used for BLE advertisement, then device discovery can be performed, but advertisement efficiency degrades due to interference at the band edge
Solution Approach 1:
The patent implements dynamic channel set management where the advertising channel set is not fixed but can be updated based on interference conditions. The system transitions from a static primary advertising channel set to a dynamic configuration that adapts by replacing interfered channels with alternative data channels, thereby maintaining advertisement efficiency while preserving device discovery reliability.
Solution Approach 2:
The patent changes the parameter of advertising channel selection by introducing a mechanism to modify the channel set composition. When interference is detected at band edge channels, the system alters the channel configuration by substituting problematic advertising channels with cleaner data channels, thus optimizing advertisement efficiency without sacrificing discovery reliability.
2Productivity
If the advertising channel set is updated to avoid interference, then advertisement efficiency is maintained, but protocol complexity increases requiring new link layer protocol and HCI
Solution Approach 1:
The patent applies multi-functionality by enabling data channels to serve dual purposes: their original data transmission function and an alternative advertising channel function when needed. This allows the system to maintain advertisement efficiency using existing data channels without requiring entirely new protocol structures, thereby limiting the increase in protocol complexity.
Solution Approach 2:
The patent creates a virtual copy of the advertising channel functionality within existing data channels. Instead of creating entirely new physical advertising channels, the system copies the advertising protocol operations onto available data channels, maintaining advertisement efficiency while reusing existing protocol infrastructure to minimize complexity increases.
3Adaptability or versatility
If additional advertising channels are added beyond the three primary channels, then advertisement coverage improves, but device complexity increases as new link layer protocol and HCI are required
Solution Approach 1:
The patent implements dynamic channel set management where the advertising channel set is not fixed but can be updated based on interference conditions. The system transitions from a static primary advertising channel set to a dynamic configuration that adapts by replacing interfered channels with alternative data channels, thereby maintaining advertisement efficiency while preserving device discovery reliability.
Solution Approach 2:
The system performs self-configuration by autonomously selecting and updating the advertising channel set based on detected interference conditions without requiring external protocol modifications. The device independently manages its channel configuration, reducing the need for complex standardized protocol changes while achieving channel flexibility.
Data Source
AI summary
Disclosed herein are a method and apparatus for discovering an adjacent device in a wireless communication system using Bluetooth low energy (LE). In particular, the method performed by a first device includes recognizing an advertising channel in which interference exists among three advertising channels constituting a first advertising channel set, transmitting a control message instructing application of a protected mode to a second device, when the advertising channel in which interference exists is recognized, the protected mode indicating a mode for transmitting and receiving a message using a second advertising channel set updated from the first advertising channel set in a non-connection state, and receiving an advertisement message from the second device through the second advertising channel set.