Citizens Broadband Radio Service Device(CBSD):
CBSD devices using CBRS (Citizens Broadband Radio Service) is defined in the USA for Shared Spectrum Access in 4G Band 48 (5G Band n48) in the 3.5GHz spectrum, 3550 MHz to 3700 MHz.
CBRS can be implemented using 4G, 5G or proprietary technology wireless systems
What is a Citizens Broadband Radio Service Device?
As defined by the FCC, an eNodeB which is capable to support CBRS band is referred as Citizens Broadband Radio Service Device. LTE band B42 and B43 mapped to CBRS frequency spectrum. CBSD devices are categorized into two types:
- CBSD-Category A
- CBSD-Category B
CBSD-Category A :
- Category A shall not be deployed or operated outdoors with antennas exceeding a height of 6 meters above average terrain
- If it is deployed or operated outdoors with antennas exceeding 6 meters will be classified as, and subject to, the operational requirements of CBSD Category B
- Category A base station is permitted Maximum EIRP of 30 dBm (dBm/10 MHz) or 1 Watt
- When registering with a spectrum access system (SAS), Category A devices must transmit with their requested authorization status (Priority Access or General Authorized Access), FCC identification number, call sign, user contact information, air interface technology, unique manufacturer’s serial number, and sensing capabilities if supported
CBSD-Category B :
- Category B base station is permitted Maximum EIRP of 47 dBm (dBm/10 MHz) or 50 Watt
- Its deployment/operation is limited to outdoor and antenna height is expected more than 6 meter above the terrain
- Category B base station must be professionally installed
- When registering with an SAS, Category B devices must transmit with their requested authorization status (Priority Access or General Authorized Access), FCC identification number, call sign, user contact information, air interface technology, unique manufacturer’s serial number, sensing capabilities (if supported), plus the following additional information: antenna gain, beam-width, azimuth, down-tilt angle, and antenna height above ground level.
End User Device (EUD):
- CBRS EUD permitted to Transmit Maximum Power 23dBm or 200 milliwatt
- These Device can operate only if they can positively recieve and decode an authorization signal transmitted by CBSD (CBRS base station)
| CBDS Type | Maximum EIRP (dBm/10 MHz) | Maximum EIRP (dBm/MHz) | Antenna Height (Meter) |
| Category A | 30 dBm or 1 watt | 20 dBm | < 6 meters |
| Category B | 47 dBm or 50 Watt | 37 dBm | > 6 meters |
| End User Device (EAD) | 23 dBm or 200 mili Watt | NA | NA |
Citizens Broadband Radio Service Device Vendors
Vendors include:
- Ericsson
- Nokia
- Samsung
- CableFree
- Cambium
- Airspan
- Cisco
- Ruckus
- IP Access
- Telrad
and Several other vendors also
For Further Information
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