Dedicated Short-range Communications (DSRC) and Spectrum ...T, Ford, Nokia and Qualcomm Launch...

1U.S. Department of Transportation

DEDICATED SHORT-RANGE COMMUNICATIONS

(DSRC) AND SPECTRUM POLICY

Volker Fessmann

Transportation Research Specialist

FHWA – Office of Safety R&D

U.S. Department of Transportation Office of the Assistant Secretary for Research and Technology


Contents

▪ Dedication of the Spectrum

▪ Basics of DSRC

▪ DSRC Environment

▪ Today's Challenges for DSRC

▪ USDOT’s Spectrum Sharing

Position

▪ DSRC Research Efforts

▪ DSRC Deployment Activities

▪ FCC Refresh of Record

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Frequency


Dedication of the 5.9GHz DSRC Band

▪ FCC Report and Order FCC-03-324 allocated 75 MHz of spectrum in the

5.9 GHz DSRC band

▪ The FCC noted the benefits of DSRC “…to improve traveler safety,

decrease traffic congestion, facilitate the reduction of air pollution, and help

to conserve vital fossil fuels.”


Dedicated Short Range Communications

▪ What it is

□ Low latency, Wi-Fi-like medium adapted for vehicle

environment

□ Original FCC spectrum allocation in 1999

□ FCC revised allocation in 2004 and 2006

□ FCC refreshed the record in 2016

▪ How the technology works

□ Data can be distributed in a broadcast mode (300m

range – line of sight)

□ Peer-to-peer data exchanges as well

□ Engineered to work well in a moving vehicle

environment


DSRC Spectrum Basics

▪ Packet-based medium based on IEEE 802 family

specifications for lower-layer definition

▪ Additional network layer definitions and a cryptographic

process for establishing trust and protecting confidentiality

given in IEEE 1609 family

▪ Payload definitions and performance requirements for

common data units established in SAE standards

▪ General IP transport available with certain priority

requirements and packet size limitations

Source: FCC Report and Order FCC 03-324

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Source: FCC Report and Order FCC 03-324

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What Do We Think We Can Achieve?

DSRC-ONLY Applications:

Applications that cannot be replicated by any current,

known vehicle-resident sensor- or camera-based

systems:

▪ V2V:

Intersection Movement Assist (IMA)

Left Turn Assist (LTA)

Emergency Electronic Brake Light

▪ V2I:

Red Light Violation Warning

Curve Speed Warning

Reduced Speed/Work Zone Warning

▪ Automation

High-speed Platooning

Em,ergency Ellectronic Brake Lights


DSRC Environment

Technical Maturity

Technical Efficiency

Policy and Institutional

~ Physical Medium (802.llp-wide area LAN) Standards

~ Band plan supports a highly mobile environment (low latency, multipath resilience, no association times)

~ Appropriate measurements of noise/interference allow applications to accounts for noise above and below the band

~ Band plan allows for: • High density per second per square kilometer • Innovative Use of Spectrum: Broadcast+ Peer-to-Peer Modes

~ User requirements are met: • Trust and Authentication • No subscription fees • Privacy, Security

~ Institutional requirements are met:

• Aligns with regulatory constraints

• Achieves co-existence with other primary users


DSRC Related Research Reports

▪ Vehicle-to-Vehicle Communications: Readiness of V2V Technology

for Application

□ http://www.nhtsa.gov/staticfiles/rulemaking/pdf/V2V/Readiness-of-V2V-

Technology-for-Application-812014.pdf

▪ DSRC Technology and Application – Report to Congress

□ https://www.its.dot.gov/research_archives/connected_vehicle/pdf/DSRCR

eportCongress_FINAL_23NOV2015.pdf

▪ DSRC Test Plan

□ https://www.its.dot.gov/research_archives/connected_vehicle/pdf/DSRC_

TestPlanv3.5.3.pdf

▪ DSRC Licensing and Spectrum Management Guide

□ https://rosap.ntl.bts.gov/view/dot/3577

http://www.nhtsa.gov/staticfiles/rulemaking/pdf/V2V/Readiness-of-V2V-Technology-for-Application-812014.pdf

https://www.its.dot.gov/research_archives/connected_vehicle/pdf/DSRCReportCongress_FINAL_23NOV2015.pdf

https://www.its.dot.gov/research_archives/connected_vehicle/pdf/DSRC_TestPlanv3.5.3.pdf

https://rosap.ntl.bts.gov/view/dot/3577


FCC Record Refresh for 5.9 GHz

▪ Federal Register Notice

□ https://federalregister.gov/a/2016-13510

□ Published on June 7, 2016

□ Comments provided by July 7, 2016

□ Reply comments provided by July 22, 2016

▪ The Commission solicits the submittal of prototype unlicensed interference-

avoiding devices for testing, and seeks comment on a proposed FCC test plan

to evaluate electromagnetic compatibility of unlicensed devices and DSRC.

https://federalregister.gov/a/2016-13510


Background on Ideas for Sharing

▪ Two primary mechanisms for sharing the spectrum are being

explored:

□ “detect & vacate”: an approach whereby unlicensed (Wi-Fi) devices

operate in same channel as DSRC but must vacate the channel if

DSRC signals are detected.

□ “rechannelization”: splits the band to giving the lower portion to Wi-Fi

and upper portion to DSRC.

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FCC 5.9 GHz Testing Status

▪ FCC Test Plan Published (October 7, 2016)

□ https://transition.fcc.gov/oet/fcclab/DSRC-Test-Plan-10-05-2016.pdf

▪ FCC Open House (October 21, 2016) – Review Phase I Testing

□ https://ecfsapi.fcc.gov/file/110254808472/13-49.pdf

▪ FCC Outlined a Three Phased Testing Strategy

□ Phase 1: Laboratory Bench Testing

□ Phase 2: Basic Field Research with Devices

□ Phase 3: “Real-world” Scenario Testing

https://transition.fcc.gov/oet/fcclab/DSRC-Test-Plan-10-05-2016.pdf

https://ecfsapi.fcc.gov/file/110254808472/13-49.pdf


Phase 1 – Update

▪ Test Units Submitted to FCC in Response

□ Nine UNII-4 devices provided by five parties in September 2016

□ Six DSRC devices provided by industry in September 2016

□ DOT provide same 10 MHz DSRC devices in October 2016

□ Two 20 MHz DSRC devices provided by industry March 2017

▪ Current Status

□ FCC has completed the evaluation of operation and performance of the

devices submitted for testing

□ FCC is developing the final report which will be public


Phase 2 and 3 – Update

▪ Phase 2 and 3 Testing are dependent on successful completion of

Phase 1

▪ Planning for Phases 2 and 3 has not started yet

▪ DOT previously offered to provide resources to support FCC in

Phase 2 and 3 testing, such as:

□ Test facilities

□ DSRC devices

□ Technical expertise


USDOT Research Activities

I. 5.9 GHz Spectrum Sharing Research:

□ Provided technical support for FCC DSRC Phase 1 Laboratory Testing

□ Completed initial DSRC & Wi-Fi assessment with automotive industry

□ Conducting additional DSRC interference testing with NTIA and US Army

□ Potentially supporting FCC Phase 2 and 3 Testing

II. LTE & 5G Technical Developments:

□ Analyzing LTE-V2X requirements and related technical developments:

▪ AT&T, Ford, Nokia and Qualcomm Launch Cellular-V2X Connected Car Technology

Trials

□ Monitoring the development of 5G standards that related to V2X technologies

III. International Radio Regulations:

□ Actively participating in the International Telecommunication Union –

Radiocommunication Sector (ITU-R) to share V2X technical information on

relevant ITS agenda items

https://www.qualcomm.com/news/releases/2017/10/31/att-ford-nokia-and-qualcomm-launch-cellular-v2x-connected-car-technology


Stay Connected

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Website: http://www.its.dot.gov

Facebook: https://www.facebook.com/DOTRITAVolker Fessmann

Transportation Research

Specialist

[email protected]

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Dedicated Short-range Communications (DSRC) and Spectrum ...T, Ford, Nokia and Qualcomm Launch...

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