CBRS Coverage Restoration Through NPV-Based CBSD Transmission Control
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Solution Overview
Problem
Conventional SAS processing in CBRS networks does not account for the relative importance of different CBSDs within a wireless service provider's network, leading to inefficient allocation of spectrum when incumbent activity requires transmission adjustments.
Innovation Solution
Implement a system that prioritizes CBSDs based on Net Present Value (NPV) and uses a propagation simulator to predict RSS levels, allowing for optimized transmission adjustments that maintain efficient network operations while minimizing interference with incumbents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the SAS instructs all CBSDs to cease or limit transmissions upon detecting incumbent activity, then interference with the incumbent is minimized, but the allocation of CBRS spectrum to the service provider becomes inefficient
Solution Approach 1:
The patent applies local quality by differentiating the treatment of individual CBSDs based on their specific characteristics and locations. Instead of uniformly affecting all CBSDs, the system evaluates each CBSD's NPV and geographic position to determine selective transmission adjustments, allowing some CBSDs to continue operating while others modify or cease transmissions to protect incumbent communications.
Solution Approach 2:
The patent changes the parameter of transmission power levels and operational status for individual CBSDs based on their NPV calculations and interference potential. By adjusting these parameters selectively rather than uniformly, the system maintains efficient spectrum allocation while preventing harmful interference to incumbents.
2Device complexity
If the SAS treats all CBSDs equally without considering their relative importance, then the processing is simple, but the spectrum allocation becomes inefficient
Solution Approach 1:
The patent implements preliminary action by pre-calculating and storing NPV values for each CBSD before incumbent activity occurs. This advance preparation allows the SAS to quickly reference and apply differentiated treatment based on pre-established importance metrics, reducing real-time processing complexity while maintaining efficient spectrum allocation decisions.
Data Source
AI summary
In response to receiving instructions from a Spectrum Access System (SAS) to modify (e.g., reduce and/or cease) network transmissions in one or more Citizens Broadband Radio Service (CBRS) sub-bands following the SAS's detection of incumbent activity, the network's Operation Support System (OSS) predicts or measures received signal strength (RSS) levels based on the SAS's original instructions, estimates RSS levels based on modified versions of the SAS's instructions that prioritize higher-NPV (net present value) CBRS base stations (CBSDs) over lower-NPV CBSDs, selects a modified version whose RSS levels are approximately the same as or less than the RSS levels of the SAS's original instructions, and transmits to the SAS requests for the selected modified version. In this way, the OSS can achieves more-efficient allocation of the CBRS spectrum and therefore more-desirable network communications without interfering with the incumbent's communications.