CBRS Training Notes- Questions and 100% Correct Answers

Aggregate interference constraint means that the total amount of noise caused to each higher priority user is kept to acceptable levels. SAS Spectrum Access System. The scalable cloud service that manages CBRS transmissions. The SAS manages information about all users of the CBRS band, In order to ensure that higher priority users are Protected from harmful interference. What frequency band does CBRS operate 3550 mhz to 3700 mhz What are the three tiers for CBRS users? • Tier 1 - Tier one is the incumbents. They were here first using the spectrum before the CBRS band was created, So they get top priority wherever overlap happens. • Tier 2 - goes to CBRS users who paid to be protected from interference from users in the third tier. They do this by buying a priority access license, or PAL, at an auction. Having a PAL still doesn't guarantee access at all times, because only incumbents get that. But the PAL protects a tier two user from having their service interrupted by the users of the third tier. • Tier 3 - general authorized access users, or GAA users. GAA users can use the CBRS spectrum if it's not being used locally by the other two tiers at that time. If a higher priority user is using a portion of the spectrum at that time, GAA users may need to move to other parts of the CBRS band. GAA users don't get any interference protection from the other tiers, but they have a much much lower cost since they don't need to buy a license. PAL priority access license. Protects a tier two user from having their service interrupted by the users of the third tier.