4G5GTechnology

Citizens Broadband Radio Service Device (CBSD) Types: 4G

Citizens Broadband  Radio Service Device (CBSD) for 4G:

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

CBSD (Citizens Broadband Radio Service Device) is defined for use in the USA for Shared Spectrum Access in 4G Band 48 (5G Band n48) in the 3.5GHz spectrum, 3550 MHz to 3700 MHz

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 : 

  1. Category A shall not be deployed or operated outdoors with antennas exceeding a height of 6 meters above average terrain
  2. 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
  3. Category A base station is permitted Maximum EIRP of 30 dBm (dBm/10 MHz) or 1 Watt
  4. 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 : 

  1. Category B base station is permitted Maximum EIRP of 47 dBm (dBm/10 MHz) or 50 Watt
  2. Its deployment/operation is limited to outdoor and antenna height is expected more than 6 meter above the terrain
  3. Category B base station must be professionally installed
  4. 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):

  1.  CBRS EUD permitted to  Transmit Maximum Power 23dBm or 200 milliwatt
  2. These Device can operate only if they can positively recieve and decode an authorization signal transmitted by CBSD (CBRS base station)
CBDS TypeMaximum EIRP
(dBm/10 MHz)
Maximum EIRP
(dBm/MHz)
Antenna Height 
(Meter)
Category A30 dBm or 1 watt20 dBm< 6 meters
Category B47 dBm or 50 Watt37 dBm> 6 meters
End User Device (EAD)23 dBm or 200 mili WattNANA

Citizens Broadband Radio Service Device Vendors

Vendors include:

  • Ericsson
  • Nokia
  • Samsung
  • CableFree
  • Cambium
  • Airspan
  • Cisco
  • Ruckus
  • IP Access
  • Telrad

and Several other vendors also

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