June 17, 1997

IEEE SCC32DSRC Standards Update

Clay Collier

June 17, 1997

Review of Steps

Review of existing documentation (completed) Review current implementations (CVISN, etc.)

(completed) Resolve open issues on data typing and missing elements Review P1488 methodology and Working Group efforts Review Data Dictionary element conflicts Review P1489, Data Dictionary specification Create technical content for DSRC Data Dictionary in

P1489 format Produce technical content for Message Sets for CVO and

ETC

June 17, 1997

Resolve Open Issues: Missing (or “Format-Limited”) Data Elements

World-wide country codesCodes for credentialingWeigh Station open/close codesPhysical Lane vehicle is travelling inVehicle and Driver Out-Of-Service flagsMultiple VIN fields for double/triple

bottoms

June 17, 1997

Missing (or “Format-Limited”) Data Elements

Lock summary information for Border Clearance

Separate codes for oversize/overweight permits

FIPS codes being replaced by ANSIDriver Signalling values are ambiguousShipment Type may need more valuesJulian day in roadside date is too limiting

June 17, 1997

Resolve Open Issues: Data Typing

Message Set Template (MST) Group will specify: Physical quantities and associated units of

measure Currencies Geographical location - including

country/state codes Telephone numbers Date and time of day

June 17, 1997

Example 1: Date/Time

Seconds since 1/1/1970 60 seconds x 60 minutes x 24 hours x 365

days = ~31 million seconds Based on 4 bytes, can provide more than

100 years of time measurementAging messages:

Year (0..9) decade only -- rolls over every ten years

Day (0..366)

June 17, 1997

Example 2: Location Referencing

Maple Street

Main Street

Charles Freeway W

Charles Freeway E

Second Street Ramp

1 Sec

ond

Str

eet

2 3

4 5

Gre

enS

tree

t

June 17, 1997

Location Referencing Methods

Link IDLinear Referencing (mile markers)Street Address (state, city, street,

number)Coordinates (lat/long)Street Matching (state, city, street, street)CombinationsPlaza ID/Lane ID (for ETTM)

June 17, 1997

Link Statistics

In the U.S. there are 300,000 road names and 40 million links

Chicago:12,000 road namesand 235,000 links

Los Angeles:33,000 road namesand 700,000 links

Washington, D.C.:20,000 road namesand 161,000 links

June 17, 1997

Next Steps

Review P1488 Message Set methodology and Message Set Working Group results

Create model for P1488 type Message Set representation

June 17, 1997

Review of U.S. - JapanCEN Harmonization Workshop

Consensus that CEN Layers 3 to 7 is appropriate Existing ministack Accepted in Europe, likely to be used in

Japan Extensible to other applications

NavigationTraffic informationParking

International ComparisonJapan

U.S.

Europe

1 million nav systems sold @ ~$2,000150,000 VICS receivers sold @ $200-$500 Toll roads very expensive

250,000 nav systems sold @ ~$2,000 CEN DSRC standard in place

Huge emerging marketStandards not yet in place

June 17, 1997

New Project Plan Outline

Foreword and Introduction Scope References Definitions and Abbreviations Architecture

Explanation of the capabilities and interfaces between the DSRC components governed by this standard and other standards

Transponder Resources Definition and explication of the set of resources that may be

present on the transponder, as well as the transponder memory map and the pre-defined fields in read-only memory

June 17, 1997

New Project Plan (continued)

Transponder Commands and Memory Access Definition and explication of the commands used to access

transponder resources

Resource Manager Definition and explication of the capabilities and interfaces

of the Resource Manager in the roadside equipment

ITS Application Messages ASN.1 Definitions Binary (PER) Common Types

June 17, 1997

New Project Plan (continued)

Application Layer Specification of the Layer 7 services used to connect the

Resource Manager to the Layer 2 elements CEN Tailoring