V2X Roadside Unit, IEEE 1609.x protocol stack

An extended temperature V2X roadside unit with cellular capability, RSU-201U provides preloaded IEEE 1609.2/3/4 stack running on Linux OS. The SDK enables direct Linux version V2X application software porting on C/C++ user space code to meet "Tomorrow’s Smart City, Today."

Tomorrow's V2X RSU, Today

Integration of module-structured i.MX6/Cellular/GNSS main board (HVP-201), DSRC sub-system (VTX-201), and IEEE 1609.x stack (VPS-201U) in an IP67 enclosure to directly port V2X applications on Linux® and explore V2X sensor fusion feasibility.


Dual-System Integration
Main system: i.MX6, Cellular, GNSS
DSRC sub-system: Craton, Pluton
Preloaded Firmware
IEEE 1609.2, 1609.3, 1609.4, SAE J2735
Operation System
Linux (Ubuntu 11.10, kernel 3.0.35)
Development Tool
Unex® SDK, User’s Guide, support
GNSS Positioning
GPS/Glonass/Galileo/QZSS constellations
Cellular Capability
u-blox® SARA supports regional frequency bands
System Memory
Main system: 2GB DDR3, 8GB NAND
Sub-system: 128MB DDR3, 32MB NOR
Extended Temperature
-40°C ~ +70°C (Infineon SLE97: -20°C ~ +85°C)
Power Supply
48V PoE or DC 10-24V
outdoor DSRC, GNSS, cellular


DSRC Performance
Class C spectrum masks: +20dBm RF power at antenna port
Fading Sensitivity
Superior performance in multipath scenarios
Frequency Deviation
Frequency accuracy at ± 6.0ppm in –40°C ~ +85°C
Power Accuracy
Dynamic and accurate power in 4.5dBm ~ 25dBm
GNSS Performance
1.5m accuracy (CEP50 with SBAS), 10Hz refresh rate
ESD Protection
IEC 61000-4-2 Level 4, Contact ±8kV, Air ±15kV


i.MX 6 Scalability
Pin and software scalable to Dual/Quad
GNSS Flexibility
u-blox® NEO series or external GNSS
Flexible Power Input
802.3at PoE or DC 10-24V
Feature Rich I/O
Software Flexibility
default Linux OS, optional ThreadX RTOS


Modular Hardware Architecture


Linux Software Architecture


Operation System
Linux OS (Ubuntu 11.10, kernel 3.0.35)
1609.2, 1609.3, 1609.4, SAE J2735
Development Tool
Unex's SDK: API, sample codes
Hardware Guide
User's Guide


Main Chipset
Main system: i.MX6, onboard Cellular/GNSS modules
DSRC sub-system: Craton processor, Pluton RF
System Memory
Main system: 2GB DDR3, 8GB NAND
Sub-system: 128MB DDR3, 32MB NOR
5.85 ~ 5.925 GHz
802.11p, ITS-G5
± 6.0ppm deviation
Class C +20dBm RF power
DSRC Sensitivity
-73 ~ -97dB (typical)
Learn more
1.5m accuracy (CEP50 with SBAS)
-135dBm sensitivity
NMEA 0183
External Connector
two DSRC antenna connectors
one GPS antenna connector
one Cellular/3G antenna connector
one 10-24V power input
one Cellular/3G SIM socket
one 48V PoE
one USB, one RS232 for external GNSS
one RS232 console, one CAN
two reserved connectors
two outdoor 7.6dBi DSRC antennas
one outdoor GNSS antenna
one outdoor Cellular/3G antenna
Power Supply
802.2at PoE or standard power input
Operation Voltage
48V on PoE or DC 10-24 V
Power Consumption
Operation Temperature Range
ambient: -40°C~ +70°C
(Infineon SLE97 -20°C ~ +85°C)
Product Dimension
225mm (L) x 255mm (W) x 78mm (H)

Package Contents

1. RSU-201U x 1 with preloaded IEEE 1609.2/3/4 stack running on Linux OS (Ubuntu 11.10, kernel 3.0.35)
2. Two DSRC outdoor antennas
3. One outdoor GNSS antenna
4. One outdoor cellular antenna
5. Mounting Bracket with two clamp and needed accessories
6. Unex’s SDK, Hardware Guide and User’s Guide downloaded from Unex’s server.

Ordering Information

V2X Roadside Unit, 1609.x protocol stack
V2X Roadside Unit, ETSI TC-ITS protocol stack
V2X Roadside Unit

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