Bluetooth Piconet Blocking via Access-Code Targeting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for disrupting Bluetooth communications are imprecise, often affecting unintended channels and devices due to encrypted frequency hopping, making it difficult to selectively interrupt specific piconets without causing interference.
Innovation Solution
A monitoring station that decodes access codes of Bluetooth packets across all 79 channels to initiate targeted blocking transmissions within precise timing windows, either interfering with packet headers to cause denial of service or corrupting payloads for service degradation, while minimizing interference with other piconets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broadband jamming is used to disrupt Bluetooth communications, then denial of service is achieved, but interference is caused to all channels and devices in the area
Solution Approach 1:
The patent segments the broadband jamming approach into channel-specific targeted blocking. Instead of transmitting jamming signals across all 79 Bluetooth channels simultaneously, the system identifies specific target piconets by decoding their access codes and transmits blocking transmissions only on the specific channels and time slots where those target piconets are active. This segmentation allows denial of service to be achieved against specific devices without affecting other channels and devices in the area.
Solution Approach 2:
The patent applies local quality by making the blocking transmission properties specific to the target location and time. The system monitors all 79 channels to identify target piconets, then transmits blocking signals only at the specific channels, time slots, and power levels appropriate for disrupting the target while leaving other areas unaffected. This localized approach ensures that the harmful effect is concentrated only where needed.
2Reliability
If frequency hopping encryption is used in Bluetooth, then communication security is improved, but precision targeting of specific piconets becomes difficult
Solution Approach 1:
The patent applies preliminary action by performing access code decoding and piconet identification before initiating blocking transmissions. The system continuously monitors all 79 channels, decodes access codes to identify target piconets, and stores this information for later use. This preliminary identification phase allows the system to know which piconets to target before the actual blocking action occurs, enabling precise targeting despite frequency hopping encryption.
Solution Approach 2:
The patent uses the access code as an intermediary to bridge the gap between encrypted frequency-hopping communications and targeted blocking. By decoding the access code portion of packets (which is not encrypted), the system can identify target piconets without needing to decrypt the actual communication data. This intermediary approach allows precision targeting while maintaining the security benefits of frequency hopping encryption for the actual data transmission.
Data Source
AI summary
A method and apparatus for precision blocking in Bluetooth target piconets is described. A Bluetooth monitoring station is used to receive packets on all 79 channels simultaneously. The address codes for a set of target piconets may be received. The access codes are decoded and examined for all received packets. If a set of packets is identified from the received packets, each identified packet having an access code within the set of target access codes, a blocking transmission is sent on that same channel of the identified packet. A start time of the blocking transmission is determined based on a start time of the identified packet, and the blocking transmission is initiated at the estimated start time on the channel, so as to cause a denial of service or a service degradation to that piconet.