Bluetooth Channel Management Using WLAN Quality Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In environments where a Bluetooth (BT) device and a Wireless LAN (WLAN) device are close to each other, conventional interference avoidance techniques fail to effectively increase the number of usable channels for the BT device when a WLAN device is absent due to movement or power cut, leading to suboptimal system throughput.
Innovation Solution
A wireless communication device that includes a wireless-channel control unit to determine and notify usable frequency bands for frequency hopping based on communication quality information, and an extended-quality-information acquisition unit to add unused channels as usable frequency bands, thereby improving channel availability for the BT device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional AFH technique is used to avoid interference from WLAN devices, then the communication reliability of the BT device is improved, but the system throughput deteriorates when WLAN devices are absent due to unnecessary channel restrictions
Solution Approach 1:
The patent implements dynamic channel classification that adapts to the presence or absence of WLAN devices. The controller continuously monitors communication quality and reclassifies channels between good channels and bad channels based on current conditions, allowing the system to transition from a static to a dynamic channel management approach that optimizes throughput when WLAN devices are absent while maintaining reliability when they are present.
Solution Approach 2:
The patent employs feedback mechanisms where the controller measures communication quality (BER, PER, or received signal strength) and uses this information to dynamically adjust channel classification. This closed-loop feedback system enables the BT device to respond to changes in the wireless environment, reclassifying channels as good or bad based on actual communication quality rather than static pre-determined classifications.
2Stability of the object's composition
If the BT device restricts channel usage to avoid interference, then the communication stability is improved, but the number of usable channels decreases leading to reduced system throughput
Solution Approach 1:
The system dynamically adjusts the set of usable channels based on real-time communication quality measurements. When WLAN devices are absent, previously classified bad channels are reevaluated and reclassified as good channels, expanding the number of usable channels. This dynamic adaptation allows the system to maintain communication stability through selective channel usage while maximizing the number of available channels when conditions permit.
Solution Approach 2:
The patent changes the parameter of channel classification from static to dynamic by continuously monitoring communication quality metrics (BER, PER, or received signal strength). This parameter change enables the system to adjust which channels are considered usable based on current communication conditions, thereby increasing adaptability without compromising stability.
3Object-affected harmful factors
If the WLAN device performs carrier sense to detect signals, then the interference avoidance is improved, but false detection occurs causing unnecessary transmission delays
Solution Approach 1:
The patent introduces an intermediary layer of intelligence in the BT device's controller that processes communication quality information and makes informed decisions about channel usability. This intermediary analysis goes beyond simple carrier sense detection, evaluating actual communication quality metrics to determine whether a channel is truly interfered with or merely appears busy due to false detection, thereby reducing unnecessary transmission delays while maintaining interference avoidance.
Solution Approach 2:
The patent replaces the simple mechanical carrier sense mechanism with a more sophisticated evaluation system that measures communication quality (BER, PER, or received signal strength) and uses this data to classify channels. This substitution reduces false detections by considering actual communication quality rather than merely detecting the presence of any signal, thereby reducing unnecessary transmission delays.
Data Source
AI summary
A composite wireless device including a WLAN device and a BT device. The composite wireless device includes a wireless-channel control unit that determines usable FH channels that can be used for frequency hopping of the BT device, based on communication quality information of the WLAN channel, and notifies the BT device of the usable frequency bands, and a BT-communication control unit that acquires communication quality information of an extended frequency band, which is a frequency band other than the usable frequency bands, as extended communication quality information. The wireless-channel control unit adds the FH channels in the WLAN channel, which are determined as being unused based on the extended communication quality information, as the usable FH channels.