WInnForum Recognized CBRS Air Interfaces and Measurements
Document WINNF-SSC-0002
Version 9.0.0 10 February 2021
This document lists information about the air interfaces (AI) and measurement types supported by the standards developed by the Wireless Innovation Forum for the Citizens Broadband Radio Service (CBRS) band.
This document consolidates information registered with the Wireless Innovation Forum following policy WINNF-SSC-0001 [n.4]. This document provides a list of the AIs, references for those AIs, and information about measurements that can be made by Citizens Broadband Radio Service Devices (CBSDs). The information consolidated in this document is used in WINNF-TS-0016 [n.3] for Release 1 operation and WINNF-TS-3002 [n.5] for Release 2 operation.
The following referenced documents are necessary for the application of the present document.
The following referenced documents are not necessary for the application of the present document but they assist the reader with regard to a particular subject area.
AI: Air Interface
CBRS: Citizens Broadband Radio Service.
CBRS band: The 3550-3700 MHz Citizens Broadband Radio Service band.
Citizens Broadband Radio Service Device (CBSD): Fixed Stations, or networks of such stations, that operate on a Priority Access or General Authorized Access basis in the Citizens Broadband Radio Service.
E-UTRA: Evolved Universal Terrestrial Radio Access
Spectrum Access System (SAS): A system that authorizes and manages use of spectrum for the Citizens Broadband Radio Service in accordance with subpart F in [n.8].
The following air interfaces (AIs) have been registered with the Wireless Innovation Forum for operation in the CBRS band:
• Air Interface Reference: 3GPP TS 36.300
• Air Interface Reference: IEEE 802.16e
The following measurement types have been registered with the Wireless Innovation Forum for operation in the CBRS band.
Definition: Measurement of the radio frequency energy received over a set of frequency ranges during a measurement interval with results reported to a SAS for each of the frequency ranges in terms of effective received power for each frequency range.
The measurement capabilities associated with the Received Power measurement type are given in the following subsections.
Semantics: Received Power can be measured and reported when the CBSD does not have a spectrum grant from the SAS. If this measurement report capability is indicated by the SAS to the CBSD, the CBSD performs and reports Received Power measurements over the entire CBRS band in segments that do not exceed 10 MHz per measurement report. Those measurement reports are sent to the SAS in the first Spectrum Inquiry Request message and first Grant Request message.
A given CBSD can include unsolicited (i.e., even if SAS did not send measReportConfig to CBSD) measReport object in spectrumInquiryRequest object or grantRequest object, if the CBSD included measCapability parameter in registrationRequest object to SAS with a value of RECEIVED_POWER_WITHOUT_GRANT.
A given CBSD must include measReport parameter in spectrumInquiryRequest object, if SAS included measReportConfig parameter in registrationResponse object to CBSD.
Table 7.1-1: MeasReport Object Definition
| Parameter | Description |
|---|---|
NAME: rcvdPowerMeasReports DATA TYPE: array of object: RcvdPowerMeasReport | An array of separate reports measured as Received Power. |
Table 7.1-2: RcvdPowerMeasReport Object Definition
| Parameter | R/O/C | Description |
|---|---|---|
NAME: measFrequency DATA TYPE: number | Required | Frequency of the lowest end of the measured frequency range in Hz. |
NAME: measBandwidth DATA TYPE: number | Required | Measurement bandwidth in Hz used by CBSD to perform the Received Power measurement. The range bounded by measFrequency as the lower bound and (measFrequency + measBandwidth) as the upper bound expresses the frequency range used in making the measurement. |
NAME: measRcvdPower DATA TYPE: number | Required | Received Power measurement in units of dBm. The range of this parameter is -100 dBm .. -25dBm. The Received Power is measured over the frequency range from measFrequency as the lower bound to (measFrequency + measBandwidth) as the upper bound. |
Semantics: Received Power can be measured and reported when the CBSD has a spectrum grant from the SAS. If this measurement report capability is indicated by the SAS to the CBSD, the CBSD performs and reports Received Power measurements over one or more frequency ranges that do not exceed 10 MHz per measurement report. The measurement report(s) are sent to the SAS in the subsequent Heartbeat Request message.
A given CBSD can include unsolicited (i.e., even if SAS did not send measReportConfig to CBSD) measReport object in spectrumInquiryRequest or heartbeatRequest object, if the CBSD included measCapability parameter in registrationRequest object to SAS with a value of RECEIVED_POWER_WITH_GRANT.
A given CBSD must include measReport parameter in the first heartbeatRequest object, if SAS included measReportConfig parameter in either grantResponse or heartbeatResponse objects to CBSD.
Table 7.1-3: MeasReport Object Definition
| Parameter | Description |
|---|---|
NAME: rcvdPowerMeasReports DATA TYPE: array of object: RcvdPowerMeasReport | An array of separate reports measured as Received Power. |
Table 7.1-4: RcvdPowerMeasReport Object Definition
| Parameter | R/O/C | Description |
|---|---|---|
NAME: measFrequency DATA TYPE: number | Required | Frequency of the lowest end of the measured frequency range in Hz. |
NAME: measBandwidth DATA TYPE: number | Required | Measurement bandwidth in Hz used by CBSD to perform the Received Power measurement. The range bounded by measFrequency as the lower bound and (measFrequency + measBandwidth) as the upper bound expresses the frequency range used in making the measurement. |
NAME: measRcvdPower DATA TYPE: number | Required | Received Power measurement in units of dBm. The range of this parameter is -100 dBm .. -25dBm. The Received Power is measured over the frequency range from measFrequency as the lower bound to (measFrequency + measBandwidth) as the upper bound. |
Definition: Measurement of indoor loss at physical location of CBSD. This indoor attenuation data will be sent to a SAS to provide power and frequency management of the CBSD.
The measurement capabilities associated with the Indoor Loss measurement type are given in the following subsections.
Semantics: A GNSS receiver along with its antenna, embedded inside a CBSD measures received power levels at 1575.42 MHz. GNSS power levels outdoors are well regulated and are maintained uniformly at -128.5 dBm into a 0 dBic antenna at ground level to 5 degrees elevation angle. By using an extremely sensitive GPS L1 C/A code receiver, this method can measure indoor losses up to 46.5 dB.
This does not fulfill the requirement of Part 96.39(d) but can provide supplemental information to the SAS.
The indoor loss measurements are sent to the SAS upon request.
Table 7.2-1: MeasReport Object Definition
| Parameter | Description |
|---|---|
NAME: indoorLossGNSSMeasReport DATA TYPE: array of object: IndoorLossGNSSMeasReport | An array of reports of indoor loss associated with direction (Azimuth and Elevation) |
Table 7.2-2: IndoorLossGNSSMeasReport Object Definition
| Parameter | R/O/C | Description |
|---|---|---|
NAME: indoorLoss DATA TYPE: number | Required | A number representing indoor loss measurement in units of dB. This number is a float ranging from 0 dB to 70 dB |
NAME: azimuthAngleWithGNSS DATA TYPE: number | Required | A number representing azimuth angle associating the direction of each indoor loss measurement in degrees. This number is an integer ranging from 0 to 359 degrees (0 degrees is true north, 90 degrees is East) |
NAME: elevationAngleWithGNSS DATA TYPE: number | Required | A number representing elevation angle associating the direction of each indoor loss measurement in degrees. This number is an integer ranging from 0 to 90 degrees, (0 degrees at horizon, 90 degrees at zenith) |
NAME: technologyType DATA TYPE: string | Required | A string representing what technology type is being used to measure indoor loss. Allowed values are GPS_L1, GPS_L2, GPS_L5, GLONASS_G1, GLONASS_G2, GLONASS_G3, GALILEO_E1, GALILEO_E5A, GALILEO_E5B, GALILEO_E6, BEIDOU_B1, BEIDOU_B2, BEIDOU_B3 |
SAS can request CBSD to send measReport by including measReportConfig in registrationResponse object or heartbeatResponse object according to CBSD measCapability.
The measReportConfig enumeration is detailed in Table 8.1-1.
Table 8.1-1: MeasReportConfig Parameter Definition
| Parameter | Description |
|---|---|
NAME: measReportConfig DATA TYPE: array of string | The SAS uses this parameter to configure CBSD measurement reporting. The measurement report requested by the SAS shall be consistent with the CBSD measurement capabilities reported during the registration request. The CBSD shall report the measurement listed in this array. The permitted enumerations can be one or multiple of the values defined in section 7, Measurement Report Types, of this document. |
The measCapability is detailed in Table 9.1-1.
Table 9.1-1: MeasCapability Parameter Definition
| Parameter | Description |
|---|---|
NAME: measCapability | The array of string lists measurement reporting capabilities of the CBSD. The permitted enumerations can be one or multiple of the values defined in section 7, Measurement Report Types, of this document. |
| Document history | ||
|---|---|---|
| V1.0.0 | 19 April 2017 | Initial version |
| V2.0.0 | 22 June 2017 | Added air interface from Cambium Networks. Corrected E_UTRA to reflect modified rules. |
| V2.0.1 | 22 June 2017 | Editorial changes |
| V2.0.2 | 30 August 2017 | Updated the version number of the SAS-CBSD TS according to the new numbering method. |
| V3.0.0 | 15 August 2018 | Added 4G_BBW_SAA_1 air interface submitted by Siemens |
| V3.0.1 | 1 October 2018 | Corrected copyright date and updated this table to include V3.0.0 |
| V4.0.0 | 28 November 2018 | Added indoor loss measurement type. Updated to allow received power to be sent unsolicited. Addition of Measurement Report Configuration and CBSD Measurement Capability sections. Other editorial changes. |
| V5.0.0 | 10 July 2019 | Added NR air interface submitted by CBRS Alliance |
| V6.0.0 | 15 August 2019 | Added DOODLE_CBRS Air Interface submitted by Doodle Labs |
| V7.0.0 | 18 December 2019 | Added REDLINE and CW Air Interfaces |
| V7.0.1 | 14 January 2020 | Editorial correction to document number in section 2 and version in section 7 |
| V7.0.2 | 20 January 2020 | Editorial correction to make "per MHz" into "per-MHz" |
| V8.0.0 | 29 January 2020 | Added TARANA_WIRELESS Air Interface |
| V9.0.0 | 10 February 2021 | Add WINNF-TS-3002 in references. Other editorial changes are also included (formatting, removal of strikethrough-texts, removal of unused references, font size) |
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