ESC Sensor Attenuation Loop for CBRS Channel-Specific Protection
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Solution Overview
Problem
Existing communication systems face network outages due to receiver saturation events caused by high-power incumbents in shared spectrum bands, leading to unavailability of licensed channels for private enterprise networks, as current solutions like modifying the ESC sensor are impractical and take years to implement.
Innovation Solution
Implementing an external attenuator with an outer corrective loop to manage receiver saturation events, allowing identification of occupied channels by high-power incumbents and enabling continued use of other channels in the shared spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external attenuator is implemented to handle receiver saturation events, then the availability and reliability of CBRS private enterprise cellular service is improved, but the device complexity increases
Solution Approach 1:
An external attenuator is introduced as an intermediary component between the radar detection sensor and the receiver. This attenuator dynamically adjusts signal strength to prevent receiver saturation events caused by high-power incumbents, thereby improving service reliability without requiring modifications to the core ESC sensor hardware.
Solution Approach 2:
The system separates the attenuation function from the radar detection sensor by implementing an external attenuator. This segmentation allows the attenuator to be independently controlled and adjusted based on receiver saturation conditions, simplifying the overall system architecture while improving reliability.
2Reliability
If the ESC sensor is modified to handle high-power incumbents, then the receiver saturation problem is resolved, but the implementation time extends to years
Solution Approach 1:
Instead of modifying the ESC sensor in advance (which would take years), the patent implements an external attenuator that can be rapidly deployed and configured. This preliminary action approach allows the system to immediately handle high-power incumbents without lengthy modification processes.
Solution Approach 2:
The external attenuator serves as a temporary, easily deployable solution rather than a permanent modification to the ESC sensor. This approach allows for quick implementation and replacement if needed, avoiding the years-long development cycle of sensor modifications.
3Reliability
If maximum attenuation is applied to eliminate receiver saturation, then the receiver saturation event is resolved, but the identification of occupied channels is impaired
Solution Approach 1:
The external attenuator dynamically adjusts its attenuation level based on real-time receiver saturation conditions. When saturation is detected, attenuation is increased to resolve the event; when saturation is resolved, attenuation is decreased to allow accurate channel identification. This dynamic adjustment resolves the contradiction between eliminating saturation and maintaining measurement precision.
Solution Approach 2:
The system implements feedback control where the attenuator's operation is continuously adjusted based on receiver saturation detection. The feedback loop monitors receiver conditions and modifies attenuation levels accordingly, ensuring that attenuation is applied only when necessary to prevent saturation while maintaining channel identification accuracy during normal operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the availability and reliability of CBRS private enterprise cellular service by preventing network outages and allowing continued use of channels not occupied by high-power incumbents, without requiring extensive hardware or software changes.
Implementation Method 1
activate, based on the indication of the receiver saturation event, operation of an attenuator to perform attenuation for the radar detection sensor
Data Source
AI summary
Various example embodiments provide techniques for providing enhanced availability and reliability of Citizens Broadband Radio Service (CBRS) private enterprise cellular service in a dynamic protection area (DPA) of a shared spectrum system, obviating the need for activating protection for the entire lower 100 MHz of the CBRS band when a high-power incumbent is present in the DPA and instead supporting targeted activation of protection for the channel(s) of the lower 100 MHz of the CBRS band used by any incumbents present within the DPA. The targeted activation of protection for the channel(s) of the lower 100 MHz of the CBRS band used by any incumbents present within the DPA may be based on use of an outer corrective loop, based on an external attenuator and a control computer for the environmental sensing capability (ESC) sensor, to take the ESC sensor out of the receiver saturation event and identify channel(s) being used by incumbents so that targeted DPA activation may be achieved.