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FICOSA INTERNATIONAL S.A. 2016. This document or its contents may not be communicated

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TCU-FITAX-3.5

DSRC OBU User Manual

Version 01.04

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Revision History:

Date

Version

Description

23/03/2020

V01.00

First Draft

11/05/2020

V01.01

Added Review Comments:

Section 2.2 –Label Design modified to include

Part name, Model Name, FCC ID and FCC Id of

the LTE Module.

Section 2.5 –Added information related to

maximum gain for a permitted Antenna.

Section 10.1 –Added Details for a “Permitted

Antenna”

20/05/2020

V01.02

Updates following review comments:

Section 10.1 –Remove Antenna Type

information from table.

Section 10.1 –Include Max Gain Data for GSM,

WCDMA, and LTE Technology.

Section 10.1 –Include Unlicensed Bands

information.

Section 5.1 –Remove PCB Photo.

22/05/20

V01.03

Updates following review comments:

Section 10.1 –Added comment

about operational mode of DSRC channels.

22/06/20

V01.04

Updates following review comments:

Section 10.3 –Update Regulatory Information

to reflect Class A compliance.

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FICOSA INTERNATIONAL S.A. 2016. This document or its contents may not be communicated

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LIST OF CONTENTS

1. INTRODUCTION ......................................................................................................................................6

2. DSRC OBU SYSTEM DESCRIPTION....................................................................................................6

2.1 DSRC OBU -GENERAL ASSEMBLY OVERVIEW.......................................................................................6

2.2 DSRC OBU -LABEL DETAILS..................................................................................................................8

2.3 DSRC OBU -EXTERNAL DIMENSIONS.....................................................................................................9

2.4 DSRC OBU -BOARDS..............................................................................................................................9

2.5 DSRC OBU -SYSTEM ARCHITECTURE OVERVIEW ..................................................................................9

2.6 DSRC OBU –INTERFACES DESCRIPTION...............................................................................................11

2.6.1 MAIN Connector Pin-Out .................................................................................................12

2.6.2 HMI & CAN Connector Pin-Out.......................................................................................13

3. ELECTRICAL CHARACTERISTICS ..................................................................................................14

4. DSRC OBU POWER UP PROCEDURE ...............................................................................................15

5. DSRC OBU BOOT UP PROCEDURE...................................................................................................16

5.1 CONNECTING TO THE UNIT .....................................................................................................................16

5.2 DSRC OBU SOFTWARE VERSION ..........................................................................................................16

5.3 ADB.......................................................................................................................................................17

5.4 GNSS FIX ACQUISITION .........................................................................................................................17

5.5 BASIC SAFETY MESSAGE ........................................................................................................................18

5.6 CONNECTING TO THE HMI BOARD WITH ADB OVER USB......................................................................19

5.7 ANDROID SDK........................................................................................................................................19

5.8 GETTING ANDROID SDK FOR LINUX ......................................................................................................19

5.9 SET SDK ENVIRONMENT VAR .................................................................................................................20

6. CAPTURING BASIC SAFETY MESSAGES........................................................................................21

7. DSRC OBU - SAFETY APPLICATIONS..............................................................................................22

7.1 EMERGENCY ELECTRONIC BRAKE LIGHTS (EEBL) ................................................................................22

7.2 FORWARD COLLISION WARNING (FCW)................................................................................................22

7.3 BLIND SPOT WARNING/LANE CHANGE WARNING (BSW/LCW)............................................................24

7.4 DO NOT PASS WARNING (DNPW)..........................................................................................................25

7.5 INTERSECTION MOVEMENT ASSIST (IMA)..............................................................................................26

7.6 LEFT TURN ASSIST (LTA) ......................................................................................................................27

7.7 RIGHT TURN ASSIST (RTA)....................................................................................................................27

7.8 SPEED LIMIT WARNING /CURVE SPEED WARNING (SPD/CSW)............................................................28

8. DEAD RECKONING...............................................................................................................................29

9. VEHICLE INTEGRATION ....................................................................................................................30

9.1 DSRC OBU -MECHANICAL VEHICLE INTEGRATION..............................................................................30

9.2 DSRC OBU -ELECTRICAL VEHICLE INTEGRATION................................................................................30

9.3 VIRTUAL CAN PROTOCOL......................................................................................................................31

10. REGULATORY INFORMATION USA ................................................................................................35

10.1 PERMITTED ANTENNA........................................................................................................................35

10.2 RF EXPOSURE SAFETY........................................................................................................................36

10.3 FCC STATEMENT ...............................................................................................................................36

11. ANNEX #1.................................................................................................................................................38

11.1 HOST A HOTSPOT ...............................................................................................................................38

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11.2 ENABLING FORWARDING ON SC20 ....................................................................................................39

11.3 MQTT API ........................................................................................................................................39

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Acronyms

OBU

On Board Unit

DSRC

Dedicated Short Range Communications

V2X

Vehicle-To-Everything

Host Vehicle

Remote Vehicle

EEBL

Emergency Electronic Brake Lights

FCW

Forward Collision Warning

BSW

Blind Spot Warning

LCW

Lane Change Warning

DNPW

Do Not Pass Warning

IMA

Intersection Movement Assist

LTA

Left Turn Assist

RTA

Right Turn Assist

SPD

Speed Limit Warning

CSW

Curve Speed Warning

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1.Introduction

The purpose of this document is to describe and list all the functionalities and

capabilities of DSRC OBU from an end user point of view.

The acronyms DSRC stands for “Dedicated Short Range Communications” which is

the technology that allows V2X communications based on Standard 802.11p.

The following data is related to the DSRC OBU for what concerns FCC Certification.

Model Name: TCU-FITAX-3.5

FCC ID: 2AVOU-AAA2020FTX35

In addition, the Main Board contains an LTE Module with P/N being SC20ASA-8GB-STD,

the FCC ID of which is: XMR201706SC20A

2.DSRC OBU System Description

2.1 DSRC OBU - General Assembly Overview

The following pictures show an overview of the DSRC On-Board-Unit from Top and

Bottom Side.

Figure 1. Top View of the DSRC Units (Plastic side).

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Figure 2. Bottom View of the DSRC Units (Metal side)

The OBU Bottom side is made of metallic material in order to ease thermal dissipation

of the most critical components.

In addition, below is shown a breakdown of the DSRC OBU Mechanical Assembly

along with the weight for each individual item.

Figure 3. DSRC OBU Mechanical Breakdown and Weight

The Total Weight of the Unit is 470 g.

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2.2 DSRC OBU - Label Details

The template of the DSRC OBU label is captured in Figure 4 along with the relevant

dimensions.

Figure 4. DSRC OBU Label Description

There is a specific area on the Top Side of the DSRC OBU to allocate the Label as

shown below.

Figure 5. DSRC OBU Label Placement and Dimensions

85 ± 0.5 mm

55 ± 0.5 mm

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2.3 DSRC OBU - External Dimensions

Below are shown the overall dimensions of the DSRC OBU.

Figure 6. DSRC OBU Overall Dimensions

2.4 DSRC OBU - Boards

The DSRC OBU consist of two boards:

Main Board: This Board provides the V2X Communications capability. It

contains mainly the Main Processor, the RF Front-End, GNSS Receiver and

Power Management.

HMI Board: The HMI Board provides the Wifi/BT, LTE connectivity, HDMI,

Audio and Ethernet interfaces as well as CAN interfaces. In addition, it includes

an Android Microprocessor to develop 3er Party Applications.

2.5 DSRC OBU - System Architecture Overview

The below picture shows the System Architecture of the V2X Main Board.

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Figure 7. Main Board System Architecture

The following Figure shows the Architecture of the OBU as Assembly, V2X Main

Board + HMI Board.

Figure 8. DSRC OBU System Architecture (Main + HMI Board)

Although the Antennas are shown in the above diagram to aid understanding of the

overall system, these particular items are not supplied as part of DSRC OBU Product.

The OBU will provision Antenna Interfaces but the Antennas themselves are

responsibility of the party in charge of vehicle integration.

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