Entering installation information

When a CBRS device (CBSD) is installed, the following information is required:

  • Latitude & Longitude

  • Height (above ground level in meters)

  • Azimuth

  • Tilt

This information must be accurate in order to ensure a spectrum grant request is correctly submitted.  Failure to enter the correct information can result in the grant not being authorized.

CBRS requires accurate geolocation information (in decimal degrees format) for all devices in order to determine what frequencies and power settings are available.

If the values are too far off it can result in the device (typically an RN) not being recognized as located in an area that supports CBRS. This will prevent the RN from coming up correctly.

A common mistake is to forget a minus sign on the longitude.

  • For example, the first coordinates below are for Milpitas, CA and would allow a CBRS RN to come up and connect to a BN.

    • Milpitas, CA: 37.41163586011681, -121.91621993101295

  • If the minus sign is dropped, the system will come up as if it was located in China, which is not a supported CBRS operations area. Therefore, the RN will not be able to receive a grant and operate

    • Shandong, China: 37.41163586011681, 121.91621993101295

Certified Professional Installer (CPI) requirement

  • CBRS equipment must be installed by an engineer who has passed CPI certification training.

  • This entitles the engineer to use an ID and public key certificate to authenticate themselves as the engineer of record approving an installation.

  • A CPI must either physically install the CBSD themself or take responsibility for the accuracy of data entered by another installer.

Registering a BN with TCS

When a BN is first configured, the BN must have the correct URL as below for TCS in order to contact it.

  • registration.trial.cloud.taranawireless.com/443

SAS Operation

Supported SAS operators

  • G1 supports Google and Federated Wireless.

  • Getting an FCC OR-ID CBRS configuration of a Tarana network requires an ID from the SAS used (FCC OR-ID) issued by the SAS to the operator and uniquely identifies the operator and its equipment within that SAS.

  • Changing SAS will require the operator to get a new ID.

About spectrum grants

  • A SAS issues a grant to CBRS devices.

  • The grant includes the allowed power level (EIRP), frequency, and channel width.

  • These values are subject to what the SAS permits and are based on location of the device.

Obtaining a spectrum grant

  • The assignment of a grant is solely at the discretion of the SAS.

  • The grant from the SAS will include the allowed EIRP, the frequency, and channel width on a per-carrier basis.

  • The following diagram shows the process of a device requesting a grant, receiving the grant, and receiving authorization.

  • A device must successfully complete each step before it can transmit.

Verifying spectrum grants
  • Once configured, a BN or RN will not become fully operational until it has been issued a grant from the SAS and received authorization.

  • The radios will be muted until authorization from the SAS occurs, even if the grant has been issued.

Troubleshooting Spectrum Grants

Understanding CPAS
  • Coordinated Periodic Activities among SAS’s (CPAS) is a daily activity in which all SAS operators: Synchronize data with each other Retrieve latest data from the FCC and WinnForum databases

  • Reallocate resources among CBSDs Recalculate DPA move lists CPAS occurs between 7 am UTC - 10 am UTC each day.

  • During CPAS, the SAS cannot issue new grants, therefore it’s recommended to do maintenance before CPAS.

  • Once CPAS is complete, the SAS notifies CBSDs of any required changes.

Understanding DPAs
  • A Dynamic Protection Area (DPA) is a geographic exclusion zone that defines an area where an incumbent is operating that must be protected.

  • Activating a DPA will cause any other CBSDs (PAL or GAA) deemed to be potentially interfering to have their grants suspended.

  • The CBSD’s grant will be suspended until the DPA is deactivated.

If the Unit does not receive grant
  • Verify the latitude and longitude of the RN is correct and a location where CBRS operation is supported.

  • Check and make sure the FCC OR-ID value matches what was provided by your SAS.

  • Ensure the device is not in an active DPA If these values are correct, contact your SAS to verify spectrum grants are available for your area.

  • Depending on timing, it is possible a grant or authorization must wait until after CPAS has occurred, i.e., 10 am UTC.

Grant is suspended
  • A grant may be suspended pending evaluation by a SAS.

  • For example, while the SAS calculates if the new grant will impact incumbents.

  • New grant authorizations are given after CPAS has occurred.

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