TV White Space Illegal Device Detection and De-enabling
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Solution Overview
Problem
There is a need for a method to detect and de-enable illegal devices operating in TV White Space (TVWS) bands to protect licensed devices, as unlicensed devices may attempt operation in unusable channels without conforming to regulations, potentially interfering with licensed devices.
Innovation Solution
A method and apparatus for detecting and de-enabling illegal devices in a WLAN system by using a first station to receive an available channel list and an enabling signal, determining if a second station is an illegal device based on the channel list and signal information, and transmitting a report frame to enable de-enabling, either directly or through a Coexistence Manager, if the station is found to be operating in an unauthorized channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If unlicensed devices operate in TVWS bands without strict regulation, then device versatility and ease of operation are improved, but harmful interference to licensed devices increases
Solution Approach 1:
The patent implements a feedback mechanism where unlicensed devices report their operating status and received signals to a Coexistence Manager, which then provides control messages to adjust device behavior. This closed-loop feedback system enables dynamic regulation that maintains device versatility while preventing harmful interference through continuous monitoring and adjustment.
Solution Approach 2:
The Coexistence Manager acts as an intermediary between licensed and unlicensed devices. It receives information from unlicensed devices, processes it according to regulatory requirements, and generates appropriate control messages. This mediator approach allows unlicensed devices to operate flexibly while ensuring they do not interfere with licensed devices through centralized coordination.
2Reliability
If spectrum sensing mechanisms are implemented to detect licensed devices, then protection of licensed devices is improved, but device complexity and energy consumption increase
Solution Approach 1:
The patent requires unlicensed devices to perform preliminary spectrum sensing and obtain channel availability information before operating in TVWS bands. By conducting detection actions in advance and reporting to the Coexistence Manager beforehand, the system ensures licensed devices are protected while allowing unlicensed devices to operate reliably in known-safe channels without continuous complex sensing.
3Reliability
If unlicensed devices must confirm channel availability through spectrum sensing or geo-location databases, then reliability of operation is improved, but loss of time and productivity decrease
Solution Approach 1:
The system performs channel availability confirmation as a preliminary action before unlicensed device operation begins. By requiring devices to sense channels and report to the Coexistence Manager in advance, the system establishes reliable operating conditions beforehand, allowing devices to then operate without repeated time-consuming checks during normal operation.
Solution Approach 2:
The Coexistence Manager serves as an intermediary that centralizes the time-consuming tasks of spectrum sensing coordination and channel availability verification. Individual unlicensed devices can operate more efficiently by relying on the Coexistence Manager's centralized management of channel information, reducing the time each device spends on independent confirmation while maintaining overall system reliability.
Data Source
AI summary
A method for an enabler entity to indicate an event to a manager entity includes transmitting, from the enabler entity to the manager entity, an event indication message indicating an event in a device served by the enabler entity. The enabler entity enables communication between the device and the manager entity and the manager entity exchanges information required for coexistence between enabler entities comprising the enabler entity. The event indication message includes type information indicating that the event indication message is for indicating that a specific device is detected by the device, the specific device operating on a frequency not permitted to the specific device.