Issue 2
October 2023
Preface
Radio Standards Specification RSS-252, issue 2, Intelligent Transportation Systems’ (ITS) On-Board Units (OBUs) in the 5895-5925 MHz Band, replaces RSS-252, issue 1, Intelligent Transportation Systems – Dedicated Short Range Communications (DSRC) – On-Board Unit (OBU), dated September 2017.
The main changes are listed below:
- removed all sections from issue 1
- added sections 1-5 to establish the technical parameters for Cellular Vehicle-to-Everything (C-V2X)
Inquiries may be submitted by one of the following methods:
- Online using the General Inquiry form (in the form, select the Directorate of Regulatory Standards radio button and specify “RSS-252” in the General Inquiry field)
- By mail to the following address:
Innovation, Science and Economic Development Canada
Engineering, Planning and Standards Branch
Attention: Regulatory Standards Directorate
235 Queen St
Ottawa ON K1A 0H5
Canada - By email to consultationradiostandards-consultationnormesradio@ised-isde.gc.ca
Comments and suggestions for improving this standard may be submitted online using the Standard Change Request form, or by mail or email to the above addresses.
All Innovation, Science and Economic Development Canada publications related to spectrum management and telecommunications are available on the Spectrum management and telecommunications website.
Issued under the authority of
the Minister of Innovation, Science and Industry
________________________
Martin Proulx
Director General
Engineering, Planning and Standards Branch
1. Scope
This Radio Standards Specification (RSS) sets out the certification requirements for licence-exempt radio apparatus operating in the 5895-5925 MHz band.
2. Purpose and application
Equipment subject to this standard consists of licence-exempt, On-Board Units (OBUs), radio apparatus operating in the 5895-5925 MHz frequency band intended for use in Intelligent Transportation System (ITS) applications.
3. Definitions
The following terms are used in this document.
Cellular Vehicle-to-Everything (C-V2X): The use of cellular radio techniques defined by the 3rd Generation Partnership Program (3GPP) to transfer data between roadside and mobile units, between mobile units, and between portable and mobile units to perform operations related to the improvement of traffic flow, traffic safety, and other intelligent transportation service applications in a variety of environments. C-V2X systems may also transmit status and instructional messages related to the units involved.
Mobile unit: A device designed to be used in motion as well as during halts at unspecified points in which the radiating structure(s) of the device is/are more than 20 cm away from the body of the user.
Portable unit: A device designed to be used so that the radiating structure(s) of the device is/are 20 cm or less from the body of the user.
On-Board Unit (OBU): A C-V2X transceiver that is normally mounted in or on a vehicle or mobile unit, or is integrated into a portable unit. An OBU can be operational while the vehicle or the portable unit is either in motion or stationary. OBUs receive and transmit on one or more radio frequency (RF) channels.
4. General requirements and references
This section sets out the general requirements and references related to this RSS.
4.1. Coming into force
This document will be in force as of the date of its publication on Innovation, Science and Economic Development Canada’s (ISED) website.
A copy of RSS-252, issue 1, is available upon request by emailing consultationradiostandards-consultationnormesradio@ised-isde.gc.ca.
4.2. Certification requirements
Equipment covered by this standard is classified as Category I equipment. Either a technical acceptance certificate (TAC) issued by ISED’s Certification and Engineering Bureau or a certificate issued by a recognized certification body (CB) is required.
4.3. Licensing requirements
Equipment covered by this standard is exempt from licensing requirements pursuant to section 15 of the Radiocommunication Regulations.
4.4. RSS-Gen compliance
Equipment being certified under this standard shall also comply with the general requirements set out in RSS-Gen, General Requirements for Compliance of Radio Apparatus.
4.5. Normative publications
The following document shall be consulted in conjunction with this RSS:
- ANSI C63.26, American National Standard for Compliance Testing of Transmitters Used in Licensed Radio Services
The applicable version of ETSI/ANSI standards and accepted KDBs are listed on ISED’s Certification and Engineering Bureau website.
Acronyms
- ANSI: American National Standards Institute
- ETSI: European Telecommunications Standards Institute
- KDB: Knowledge Database
4.6. Related documents
All ISED publications related to spectrum management and telecommunications are available on the Spectrum management and telecommunications website.
The following document should be consulted in conjunction with this RSS:
Note that 3GPP Release 14 is the earliest version that shall be used. Newer 3GPP releases containing C-V2X may be referenced.
5. Transmitter requirements
This section sets out the technical requirements applicable to radio transmitters subject to this standard.
5.1. Measurement method
All measurements shall be performed in accordance with the techniques and procedures for measuring equipment provided in ANSI C63.26, American National Standard for Compliance Testing of Transmitters Used in Licensed Radio Services.
5.2. Transmitter power
The average equivalent isotropic radiated power (e.i.r.p.) for C-V2X OBU transmitters shall not exceed 2 W (33 dBm).
5.3. Unwanted emissions
Average conducted power measured at the antenna input shall not exceed:
- -29 dBm/100 kHz at the band edges (5895 MHz and 5925 MHz) up to 1 MHz above or below the band edges
- -35 dBm/100 kHz at 1 MHz above or below the band edges up to 10 MHz above or below the band edges
- -43 dBm/100 kHz at 10 MHz above or below the band edges up to 20 MHz above or below the band
- -53 dBm/100 kHz at 20 MHz above or below the band edges