Wireless Coexistence Manager for Bluetooth and WLAN Interference
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Solution Overview
Problem
Existing wireless devices with co-located air interfaces, such as Bluetooth and WLAN, face interference issues due to shared frequency bands, leading to poor user experience, and prior solutions lack flexibility in addressing interference based on operational criteria like antenna isolation and user priorities.
Innovation Solution
The method involves a closed-loop or open-loop approach that dynamically adjusts operating rules and parameters, such as priority-based time sharing and transmitter power control, based on antenna isolation and other operational criteria to mitigate interference and enhance user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Bluetooth and WLAN are co-located in the same device to provide unified wireless solution, then device functionality and user convenience are improved, but electromagnetic interference between the two interfaces causes performance degradation
Solution Approach 1:
A coexistence manager acts as an intermediary between WLAN and Bluetooth interfaces, receiving interference indicators from both sides and coordinating their operation to reduce mutual interference while maintaining both functionalities
Solution Approach 2:
The system dynamically adjusts operating parameters such as transmit power and channel selection based on real-time interference conditions, allowing the co-located interfaces to adapt their behavior to minimize electromagnetic interference
2Volume of moving object
If antenna isolation is reduced to save device size, then device compactness is improved, but interference between wireless interfaces increases
Solution Approach 1:
The system changes operational parameters such as transmit power levels and frequency channel selections based on measured antenna isolation values, allowing compact device design while compensating for increased interference through parameter optimization
3Object-affected harmful factors
If priority-based time sharing is implemented to reduce interference, then interference mitigation is improved, but system complexity increases
Solution Approach 1:
The coexistence manager serves as a centralized intermediary that handles priority-based scheduling and time sharing decisions, simplifying the overall system architecture by consolidating coordination logic in a single component rather than distributing complexity across multiple interfaces
4Object-affected harmful factors
If transmitter power control is adjusted to mitigate interference, then interference reduction is improved, but data throughput may be affected
Solution Approach 1:
Transmitter power is dynamically controlled based on real-time interference conditions and priority levels, allowing the system to maintain high throughput when interference is low while reducing power when interference occurs, thus balancing both objectives
Data Source
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AI summary
Methods and apparatus for compensating for the effects of interference between multiple wireless communication apparatus. In one embodiment, the method comprises providing a first wireless communication apparatus operating in a first band and a second wireless communication apparatus operating at least partly in the first band, where the second wireless communication apparatus operates according to a different communication protocol than the first wireless communication apparatus. Interference is compensated for between the first wireless communication apparatus and the second wireless communication apparatus by selecting and operating according to one of a plurality of operational protocols, the operational protocols being policies or criteria based on which the operation changes. Said operational protocols are selected based on e.g. the electrical isolation between antennas, or they reply the selection of an operating mode, implementing power control, etc. In another embodiment, the first wireless communication apparatus and the second wireless communication apparatus operate in a closed-loop relationship to cooperatively compensate for communication interference.