OBU-201U

IEEE 1609.x V2X On-Board-Unit (OBU)

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The OBU-201U contains V2X OBU elements of DSRC/GNSS/HSM with pre-integrated IEEE 802.11p driver and IEEE 1609.x protocol stacksrunning on ThreadX RTOS. Programmers can directly deployed V2X application software on OBU-201U through SDK. 

Automotive-grade design ensures vibrational and environmental reliability. Interoperable and standard compliant IEEE 1609.x protocol stacks ensure the best performance and compatibility with all OBUs and RSUs. OBU-201U is a V2X- ready OBU solution for trials or retrofit deployments.

  • V2X OBU solution for trials or retrofit deployment: contains RF, modem, security, positioning, IEEE 802.11p driver, 1609.x protocol stacks, and SDK (including tool-chain, protocol stack API, and user guide)  for V2X software deployment.
  • Complete 1609.x V2X protocol stacks: contains IEEE 1609.2, 1609.3, 1609.4 and SAE J2735 stacks.
  • More than +20dBm Class C RF spectrum mask compliant with margins.  
  • Internal 40MHz BW filter provide robust out-of-band radio interferences in multi-channel operation.
  • ECDSA256 accelerator provides line-rate verification to assure fixed and short latency.
  • Integrated Hardware Security Module (HSM) with dedicated V2X firmware enables ECDSA256 secure signing and ensures private keys are stored in a tamper proof device.
  • Dual PHY and MAC support concurrent dual channel operation.
  • High-performance GNSS receiver provides accurate positioning at 10Hz refresh rate. Optional Autotalks low latency algorithm reduces positioning latency which is essential for tracking in high mobility vehicles and future autonomous vehicles.
  • On board DIP switch for solo GNSS module test or firmware upgrade through DB9 RS232 interface.
  • Optimized system integration provides the longest communication range at high speed, even in the presence of obstructions.
  • AEC-Q100 qualified Autotalks V2X chipset (Q1/2015), 4-corner UV cured resin for BGA chips, and automotive-grade -40ºC ~ +85°C components (excluding Infineon -20°C ~ +85°C SLE97) ensure vibrational and environmental reliability.
  • Extensive connectivity in small 121x104.4mm PCBA size provides the most flexible integration options: one 10/100Mbps Ethernet port, two CAN ports, one RS232 console, one audio jack, one on-board microSD socket, and on-board 8-pin GPIO.
  • 128MB DDR3 and 32MB Nor Flash system memory.
  • microSD socket to use flash memory for logging purpose. 
  • On Board programmable delay ON circuitry (default 200ms) for cracking delay function.
  • Dual DC 6-32V power inputs: one 4-pin power connector supporting Vbatt. (Power-In) and ACC for automotive application; one DC power round jack for trials or retrofit deployment.

  • 40V 3000W passive TVS and active IC LTC4365 and 80V dual MOS ensure robust UV/OV/RV protection on ACC trail.
  • 40V 3000W passive TVS on Vbatt trial to LT3014 to GNSS VRTC circuitry provides GNSS hot start power trial protectionl.
  • Two DSRC MMCX antenna connectors support receiver diversity and enable robust assembly.
  • High ESD protection circuit and ESD ground cable design ensure immunity and robustness of antenna and CAN ports in ESD events.
  • EMI and power filter design effectively reduce power noise.
  • RoHS compliance meets environment-friendly requirements.
 
Software Specifications
Operation System ThreadX RTOS
Standard Compliance

IEEE 802.11p, IEEE 1609.2, IEEE 1609.3, IEEE 1609.4, SAE J2735

(Remark: update firmware will be provided after new standard finalized by project request)

Frequency Range

5.85 ~ 5.925GHz

(Remark: DSRC messages over 5.15 ~ 5.925 full band will be supported by project base.)

Protocol Stack

pre-integrated IEEE 1609.x protocol stacks:

  • IEEE 1609.2 - 2013
  • IEEE 1609.3 – 2010
  • IEEE 1609.4 – 2010
  • SAE J2735 Version 2
  • IEEE 1609.11 - Standard for Electronic Toll Collection by project base
Channel

172, 174, 176, 178, 180, 182, 184 (5.9GHz DSRC)

( Remark: DSRC messages over 5.15 ~ 5.925 full band will be supported by project base.)

SDK tool-chain, protocol stack API, and user guide
 
Hardware Specifications
Main Chipset
  • Autotalks CRATON (ATK4100) V2X communication processor: 3-core (one ARM Cortex R4F and two Synopsys ARC 625D) running at 240MHz
  • Autotalks PLUTON (ATK3100) V2X RF Transceiver
  • Telit SL869 GNSS module
  • Infineon SLE97 Hardware Security Module (HSM)
  • Memory

32MB NOR system memory and 128MB DDR3 storage memory

DSRC
  • one DSRC radio
  • frequency band: 5.85 – 5.925GHz (ITS-DSRC)
  • radio mode: 802.11p
  • operation mode: WAVE, Ad-hoc (TBC), Infrastructure (TBC) 
  • RF transmit power:  > +20 dBm Class C RF spectrum mask compliant with margins.
  • receiver sensitivity: typical -90 dBm (TBC)
  • DSRC antenna: two 5.9 GHz/ 5dBi Omni antennas (TBC)
GNSS
  • one GPS radio
  • refresh rate:10Hz
  • accuracy: TBC
  • GPS antenna: one active antenna (TBC)
Security ECDSA verification, ECIES encryption, HSM security signing and storing
Interface
  • two DB-9 female CAN 2.0 ports
  • one 10/100Mbps Ethernet port
  • one DB-9 male RS232 console port
  • one audio jack
  • one switch button
  • one on-board microSD socket for flash memory
  • on-board 8-pin GPIO
Power Supply

dual DC 6-32V power inputs:

  • one 4-pin power connector supporting Vbatt. (Power-In) and ACC;
  • one DC power round jack
Operation Voltage DC 6 ~ 32 V ± 5%
Operation Temperature Range ambient: -40ºC ~ +85ºC (Infineon SLE97 Hardware Security Module supports -20ºC ~ +85ºC , will change to SLI97 on H2/2015 production to support -40ºC ~ +85ºC) 
Operating Humidity 10% ~ 95%, non-condensing
Storage Humidity max. 95%, non-condensing
Environment-Friendly Compliance RoHS
Dimension PCBA size: 121 mm(L) x 104.4mm(W)