How to Implement CBSD Registration

This guide explains how to implement the CBSD registration process as defined in WINNF-TS-0016.

Overview

Registration is the first step for a CBSD to connect to a SAS. Upon successful registration, the SAS assigns a unique cbsdId that must be used in all subsequent messages from that CBSD.

The process consists of:

CBSD sending a registrationRequest object
SAS responding with a registrationResponse object

Prerequisites

Valid FCC ID and CBSD serial number
Professional installation data (for Category B CBSDs) or indoor/outdoor classification
Valid user contact information
TLS certificate for mutual authentication

Step 1: Construct the RegistrationRequest

The registrationRequest is an array of objects (typically one object per CBSD).

Required Parameters

Parameter	Data Type	Description
userId	string	Unique identifier for the end user or organization
fccId	string	FCC certification ID of the CBSD
cbsdSerialNumber	string	Serial number of the CBSD
callSign	string	Call sign if applicable (optional for most CBSDs)
airInterface	object	Contains air interface technology (references WINNF-SSC-0002)
measCapability	array of string	List of measurement capabilities (e.g., RECEIVED_POWER_WITHOUT_GRANT)
installationParam	object	Installation parameters: latitude, longitude, height, heightType, antenna details, indoorDeployment, etc.

Example JSON (single CBSD)

{
  "registrationRequest": [
    {
      "userId": "user123@example.com",
      "fccId": "ABC123",
      "cbsdSerialNumber": "SN456789",
      "airInterface": {
        "radioTechnology": "E_UTRA"
      },
      "measCapability": [
        "RECEIVED_POWER_WITHOUT_GRANT",
        "RECEIVED_POWER_WITH_GRANT"
      ],
      "installationParam": {
        "latitude": 37.7749,
        "longitude": -122.4194,
        "height": 10,
        "heightType": "AGL",
        "indoorDeployment": false,
        "antennaAzimuth": 0,
        "antennaDowntilt": 0,
        "antennaGain": 15,
        "eirpCapability": 30
      },
      "groupingParam": [
        {
          "groupType": "INTERFERENCE_COORDINATION",
          "groupId": "example-group-001"
        }
      ]
    }
  ]
}

Step 2: Send the Request

Use HTTPS POST to the SAS endpoint
Include valid client certificate for authentication
Content-Type: application/json

Step 3: Process the RegistrationResponse

The registrationResponse is an array matching the request order.

Key Parameters in Response

Parameter	Description
cbsdId	Assigned by SAS on success (use in all future messages)
measReportConfig	Optional array instructing CBSD to send measurements
response	Object containing responseCode and responseMessage

Common responseCode Values

Code	Meaning	Action Required
0	SUCCESS	Use returned cbsdId; proceed to spectrum inquiry
101	BLACKLISTED	CBSD FCC ID/serial blocked; contact SAS administrator
103	MISSING_PARAM	Add missing required parameters and retry
104	INVALID_VALUE	Correct parameter values and retry
105	UNSUPPORTED_PARAM	Remove unsupported parameters

Example Successful Response

{
  "registrationResponse": [
    {
      "cbsdId": "SAS123/CBSD-001",
      "measReportConfig": [
        "RECEIVED_POWER_WITHOUT_GRANT"
      ],
      "response": {
        "responseCode": 0,
        "responseMessage": "Success"
      }
    }
  ]
}

Best Practices

Store the assigned cbsdId persistently
Re-register if the CBSD is powered off/on or installation parameters change
For Category B CBSDs, ensure CPI-signed installation data is accurate
Implement retry logic with exponential backoff for transient errors
Log all response codes for debugging

Next Steps After Successful Registration

Perform spectrum inquiry
Request grants for desired channels