Spectrum Access System Immediate HP-CPE Authorization
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Solution Overview
Problem
The current Citizens Broadband Radio Service (CBRS) systems face inefficiencies due to delays in authorizing high-power (HP) Customer Premises Equipment (CPEs, which can take up to 24 hours when the Coordinated Periodic Activity among SASs (CPAS) process is performed only once a day, leading to undesirable provisioning delays.
Innovation Solution
The proposed solution allows the Spectrum Access System (SAS) to immediately authorize HP-CPEs to transmit at high EIRP levels without relying on the CPAS process, by using a pre-defined database to identify registered CPEs and leveraging existing CBSD authorizations, thereby bypassing the need for daily coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the CPAS process is performed once a day to coordinate CBRS bandwidth allocation, then interference between CBSDs and high-power transmitters is avoided, but authorization of HP-CPEs experiences delays of up to 24 hours
Solution Approach 1:
The patent applies preliminary action by pre-identifying and storing information about authorized high-power CBSDs in a database before HP-CPE authorization is needed. When an HP-CPE authorization request arrives, the SAS can immediately check the pre-prepared database rather than waiting for the daily CPAS process to complete, thus eliminating the 24-hour delay while maintaining interference avoidance guarantees.
2Reliability
If the SAS waits for the daily CPAS process to complete before authorizing HP-CPEs, then spectrum coordination is maintained, but provisioning efficiency deteriorates
Solution Approach 1:
The SAS performs preliminary actions by executing the CPAS coordination process in advance and storing the results in a database. This allows the SAS to immediately authorize HP-CPEs by checking the pre-computed coordination results, thereby maintaining spectrum coordination reliability while dramatically improving provisioning efficiency from 24 hours to near-instantaneous.
Solution Approach 2:
The patent applies partial action by having the SAS perform only the necessary subset of CPAS coordination for HP-CPE authorization specifically, rather than waiting for the complete daily CPAS process. The SAS extracts and uses the relevant coordination information from the CPAS process results, achieving sufficient spectrum coordination without the full overhead of the daily coordination cycle.
Data Source
AI summary
In a Citizens Broadband Radio Service (CBRS) system, high-power customer premises equipment (HP-CPE) transmits a registration request to a spectrum access system (SAS), which determines a CPE device type for the HP-CPE and transmits a positive registration response to the HP-CPE. The HP-CPE transmits a grant request to the SAS, which transmits a positive grant response to the HP-CPE. The HP-CPE transmits a heartbeat request to the SAS, which relies on the CPE device type to approve the heartbeat request without relying on a corresponding Coordinated Periodic Activity among SASs (CPAS) process, and transmits a positive heartbeat response to the HP-CPE. In one method, the SAS determines the CPE device type using a database that maps FCC model numbers to device types. In another method, the registration request contains a field with the CPE device type. Both methods enable immediate HP-CPE authorization without the delay of a CPAS process.