CBRS Questions and Answers 100% Pass

CBRS Questions and Answers 100% Pass A CPI needs to record the _______ and _______ with in 50 meters or better. latitude and longitude CBRS Citizens broadband radio service and shared spectrum. CBRS band MHz frequency range and established by FCC in 2015. CBRS vision Used for fixed and mobile broadband services. advantages of CBRS 1. Efficient 2. Time to market. 3. Cost 4. Feasibility SAS (Spectrum access system) Is the centralized cloud service that manages CBRS transmission to protect higher priority users from interference. The three main entities for CBRS 1. FCC 2. Winnforum 3. CBRS Alliance CPI (certified professional installer) Ensures data entered into the SAS is correct and has the right data. The SAS needs this information to protect higher end users. CBRS Three tiers Tier 1. Incumbent Tier 2. PAL ( Priority Access License) Tier 3. GAA (General Authorized Access) Tier 1 Incumbents Services using the band before CBRS was around. Tier 2 PAL CBRS user that pay for a license at auction to receive interference protection. Tier 3 GAA Is free to use by any opportunistic users. What does the SAS do? The SAS gathers information from data bases maintained by the FCC to ensure lower priority user are not interfering with higher priority users. CBSD Are devices that transmit in the CBRS band to end users. CBSD need what before that can transmit in the CBRS band? CBSD need authorization from the SAS before transmitting to ensure there is no interference to higher priority users. Some CBSD communicate through a ________ to access the SAS. Domain Proxy EUD End User Device. The SAS can ________ or __________ access. Allow or disallow When the SAS detects an incumbents user all lower end user must get out of the way within _______. 5 minutes ESC Environmental sensing capability ESC detect when a incumbent user is broadcasting in the CBRS band and communicates with the _______ to alert all lower end tiers. SAS CPI is responsible for? Entering accurate information about all CBSD to the SAS. A CBSD need to be authorized by __________ before it can be used the transmit in the CBRS band. FCC First a CBSD must send a ______________ to the SAS. The SAS with communicate with the CBSD by sending a ____________ code. Registration request. Registration response. Second, once a CBSD is registered the CBSD must then send a ____________ to the SAS so see what Spectrum is being used by other users. The SAS will respond back to the CBSD with a __________. 1. Spectrum inquiry request. 2. Spectrum inquiry response with a list of frequencies and TX power the CBSD can use. Third the CBSD will send a __________ to the SAS asking to use a range of CBRS spectrum at a giving TX power. (Ex. id like to use 3570 MHz - 3590 MHz at TX power of 27 dBm.) If the SAS approves it will give a _________. 1. Grant request. 2. ID for the spectrum grant.d Last before a CBSD can transmit is must send a ________. The SAS with respond with Heartbeat respond code. Heartbeat request A CBSD is required to heartbeat at least once every ____________ to the SAS. 4 minutes If a CBSD stops it heartbeat to the SAS is must stop ________ until is successfully heartbeats again. Transmitting What are the two categories of CBSD 1. Category A 2. Category B HAAT Height above average terrain A category A CBSD must not be more than _______ meters above ground level. 6 Category B CBSD do not have a height __________. requirement A CPI need to calculate the HAAT of a CBSD in order to assign as either a Category __________. A or B CBSD To calculate HAAT you must know the_____ _____ and _____ ____. Ground elevation and Antenna height All FCC approved CBSD have an __________ and __________ to create the CBSD unique device identifier. FCC ID and serial number The SAS uses the ________ to identify all the CBSD. Unique device identifier If a CBSD has more than two antennas you must assign a unique serial number as registrar sector 1 ________ and sector 2 ___________. 12345.1 and 12345.2 A category A CBSD is primarily used _________ and TX at a _______but can be used _____ _____ and TX a ______. 1. Indoors, lower power 2. out doors, higher power A CPI must give the height of the antenna within ________ meters. 3 What are the four antenna parameters. 1. Antenna Azimuth 2. Antenna down tilt 3.Antenna gain 4. Antenna beamwidth What are the three air interfaces. 1. E UTRA 2. CAMBIUM Networks 3. 4G BBW SAA 1 What are the two CBSD measurement types. 1. Received power without grant 2. Received power with grant