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IEEE SCC32 DSRC Standards Update

IEEE SCC32 DSRC Standards Update. Clay Collier. 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

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IEEE SCC32 DSRC Standards Update

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  1. IEEE SCC32DSRC Standards Update Clay Collier

  2. 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

  3. Resolve Open Issues: Missing (or “Format-Limited”) Data Elements • World-wide country codes • Codes for credentialing • Weigh Station open/close codes • Physical Lane vehicle is travelling in • Vehicle and Driver Out-Of-Service flags • Multiple VIN fields for double/triple bottoms

  4. Missing (or “Format-Limited”) Data Elements • Lock summary information for Border Clearance • Separate codes for oversize/overweight permits • FIPS codes being replaced by ANSI • Driver Signalling values are ambiguous • Shipment Type may need more values • Julian day in roadside date is too limiting

  5. 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

  6. 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 measurement • Aging messages: • Year (0..9) decade only -- rolls over every ten years • Day (0..366)

  7. Example 2: Location Referencing Second Street Green Street 1 2 3 Maple Street 4 5 Main Street Second Street Ramp Charles Freeway W Charles Freeway E

  8. Location Referencing Methods • Link ID • Linear Referencing (mile markers) • Street Address (state, city, street, number) • Coordinates (lat/long) • Street Matching (state, city, street, street) • Combinations • Plaza ID/Lane ID (for ETTM)

  9. Link Statistics In the U.S. there are 300,000 road names and 40 million links Chicago: 12,000 road names and 235,000 links Washington, D.C.: 20,000 road names and 161,000 links Los Angeles: 33,000 road names and 700,000 links

  10. Next Steps • Review P1488 Message Set methodology and Message Set Working Group results • Create model for P1488 type Message Set representation

  11. 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 • Navigation • Traffic information • Parking

  12. International Comparison Japan • 1 million nav systems sold @ ~$2,000 • 150,000 VICS receivers sold @ $200-$500 • Toll roads very expensive Europe • 250,000 nav systems sold @ ~$2,000 • CEN DSRC standard in place U.S. • Huge emerging market • Standards not yet in place

  13. 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

  14. 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

  15. 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

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