Spectrum Access System Expedited CBSD Authorization
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Solution Overview
Problem
Current Citizens Broadband Radio Service (CBRS) systems require secondary users to wait until the next planned time for authorization to transmit in shared spectrum, leading to delayed data communication and inefficient spectrum usage.
Innovation Solution
A computer program product that enables a Spectrum Access System (SAS) to allocate frequency spectrum and maximum transmit power to a new Citizens Broadband Radio Service Device (CBSD) prior to planned spectrum coordination, based on co-existence data and network graph analysis, allowing for immediate or expedited transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SAS evaluates requests at planned times only, then the interference coordination is reliable and accurate, but the authorization delay increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing co-existence data and network graph information about incumbent users and existing secondary users before new authorization requests arrive. This allows the SAS to quickly evaluate new requests against pre-computed interference scenarios, providing rapid authorization decisions without sacrificing coordination reliability.
Solution Approach 2:
The patent segments the spectrum coordination process into two phases: (1) pre-computation of co-existence data and network graphs during idle periods, and (2) rapid evaluation of new requests using stored data. This segmentation allows computationally intensive interference analysis to be performed in advance, while new authorizations receive quick responses based on pre-prepared information.
2Productivity
If the SAS provides rapid authorization to new CBSDs, then the spectrum usage efficiency improves, but the interference control complexity increases
Solution Approach 1:
The SAS performs preliminary computation of co-existence data, network graphs, and interference thresholds before new CBSD authorization requests arrive. By pre-processing this complex interference analysis data during idle periods, the system enables rapid authorization decisions without increasing real-time computational complexity or sacrificing interference control accuracy.
Solution Approach 2:
The patent creates simplified representations (copies) of the complex interference environment through network graphs and co-existence data structures. These graphical models capture essential interference relationships without requiring full physical simulations during authorization decisions, reducing computational complexity while maintaining accurate interference control.
3Measurement precision
If the SAS waits for the next planned time to authorize new CBSDs, then the interference thresholds are accurately determined, but the data communication is delayed
Solution Approach 1:
The SAS performs preliminary determination of interference thresholds by pre-computing co-existence data and network graph information about incumbent users and existing secondary users. This allows the SAS to provide accurate interference threshold values to new CBSDs immediately upon request, without waiting for the next planned evaluation cycle, thus eliminating data communication delays while maintaining threshold accuracy.
Data Source
AI summary
Techniques are provided for temporarily allocating a new radio controlled by a spectrum access system (SAS) a frequency spectrum in shared spectrum in which to transmit, and a maximum transmit power level. The temporary frequency spectrum and optionally maximum transmit power level may be sent to the new radio so that it can commence transmitting prior to a planned, e.g., periodic, spectrum coordination is performed for all radios which had requested authorization from the SAS to transmit in the shared spectrum.