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.MX 6/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
  • ub-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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