CBRS Incumbent Protection Using DPA Tiles and Fallback Sensing
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Solution Overview
Problem
Current CBRS systems face inefficiencies due to overprotection of incumbent users, excessive resource consumption, and lack of precise location information, leading to unnecessary restrictions and increased costs in spectrum management.
Innovation Solution
Implementing an Informing Incumbent Capability (IIC) system with heartbeat messages and DPA tiles to provide precise monitoring and generate move lists for CBSDs, maintaining obfuscation and reducing unnecessary interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional CBRS protection methods are used, then incumbent users are protected, but spectrum usage efficiency decreases and unnecessary restrictions increase
Solution Approach 1:
The system divides the protection area into multiple DPA tiles and segments the monitoring process by using heartbeat messages to track incumbent user location in discrete geographic zones. This allows CBSDs to be selectively identified and managed based on their specific relationship with DPA tiles, enabling precise protection only where needed rather than blanket restrictions across the entire protection area.
Solution Approach 2:
The invention implements localized protection by identifying specific CBSDs associated with DPA tiles where incumbents are present. Instead of applying uniform protection measures across the entire service area, the system applies protection only to CBSDs that are actually interfering with incumbents in specific local areas, thereby improving spectrum efficiency while maintaining protection reliability.
2Reliability
If overprotection measures are implemented, then incumbent users are well protected, but unnecessary restrictions and costs increase
Solution Approach 1:
The system uses heartbeat messages as feedback mechanisms to continuously monitor incumbent user location and status. This feedback allows the SAS to dynamically update the list of protected CBSDs based on actual incumbent presence, ensuring that protection measures are applied only when and where incumbents are actually operating, thereby eliminating unnecessary restrictions during periods when incumbents are absent.
Solution Approach 2:
The protection mechanism transitions from static to dynamic by continuously updating the protected CBSD list based on real-time heartbeat message information. The system adapts the protection scope according to current incumbent location and activity, allowing the protection area to expand or contract dynamically rather than maintaining fixed overprotective boundaries.
3Measurement precision
If precise location information is provided, then spectrum management improves, but incumbent user secrecy is compromised
Solution Approach 1:
The system introduces DPA tiles as intermediary geographic identifiers that provide location information without directly disclosing the incumbent user's precise position or identity. The heartbeat messages reference DPA tile locations rather than providing direct coordinates or identifying information, allowing the SAS to determine which CBSDs need protection while maintaining a level of operational security and user anonymity.
Data Source
AI summary
Systems, devices, and methods related to citizens broadband radio service (CBRS) are provided. An example system includes multiple citizens broadband service devices (CBSDs) in a neighborhood proximate to a dynamic protection area (DPA) that includes multiple DPA tiles, a communication system installed on an incumbent user, and a centralized security system (CSS). The CSS can initiate a fallback sensing protection process in response to a determination that the incumbent user is disconnected from the CSS. The fallback process includes identifying CBSDs in the DPA based on the latest heartbeat message, causing each CBSD to continuously detect RADAR signals on an authorized channel, generating a move list indicating the CBSDs that interfere with the detected RADAR signals on the authorized channel, and transmitting the move list to the SAS. The SAS can cause the CBSDs to prevent interference with the incumbent user on the authorized channel.