【正文】 EIRP Effective Isotropic Radiated Power。 OBU Onboard Unit。 GHz DEDICATED SHORT RANGE COMMUNICATION (DSRC) STANDARDS DEVELOPMENT UPDATE GHz DSRC CONCEPT GHz DSRC (Dedicated Short Range Communications) is a short to medium range munications service that supports both Public Safety and Private operations in roadside to vehicle and vehicle to vehicle munication environments. DSRC is meant to be a plement to cellular munications by providing very high data transfer rates in circumstances where minimizing latency in the munication link and isolating relatively small munication zones are important. ASTM GHz DSRC STANDARDS WRITING GROUP PARTICIPATION ? 3M ? AASHTO ? ACUNIA ? AMTECH ? ARINC ? ARMSTRONG COUNSULTING ? ATHEROS ? CALTRANS ? DIAMLERCHRYSLER ? DENSO ? GM ? GTRI ? HIGHWAY ELECTRONICS ? HITACHI ? IDMICRO ? IMEC ? INTERSIL ? ITSA ? JHU/APL ? KING COUNTY METRO TRANSIT ? MARK IV ? MiCOM Spa ? MICHIGAN STATE DOT ? MITRETEK ? MOTOROLA ? NISSAN ? . THRUWAY AUTHORITY ? OKI ELECTRIC ? PATH ? RAYTHEON ? SIRIT ? SUMITOMO ELECTRIC ? TECHNOCOM ? TOSHIBA ? TRANSCORE ? VISTEON ? WASHINGTON STATE DOT ? WiLAN ASTM GHz DSRC STANDARDS DEVELOPMENT ACTIVITY MEETINGS SINCE REPORT AND ORDER ? October 1999 ? December 1999 ? February 2023 ? March 2023 ? May 2023 ? June 2023 ? July 2023 ? September 2023 ? October 2023 ? November 2023 ? December 2023 ? January 2023 ? March 2023 ? April 2023 ? May 2023 MEETINGS SINCE REPORT AND ORDER ? June 2023 ? July 2023 ? August 2023* ? October 2023 ? December 2023 ? January 2023 ? February 2023 MEETINGS CURRENTLY SCHEDULED ? March 2023 ? May 2023 ? June 2023 * Technology Selection Meeting GHz DSRC TECHNOLOGY SELECTION ? The initial selection between the Motorola entry and the OFDM forum entry was made by the ASTM DSRC Standards Writing Group on August 24, 2023. ? THE WINNER was the OFDM forum entry IEEE Physical Layer and the IEEE Medium Access Control (MAC) Layer. (RA – Road Access) ? The writing group selection was confirmed by letter ballot vote of the Larger ASTM submittee in October 2023. ? The ASTM DSRC STD XXXX* will be a modified version of IEEE with 10 MHz wide channels instead of 20 MHz channels and half the data rate. It will include the IEEE Medium Access Control (MAC) Layer with no anticipated changes. * ASTM Standard numbers are assigned only when plete CURRENT GHz DSRC ARCHITECTURE CONFIGURATION Layer 2 Logical Link Control/ (LLC) IEEE Resource Manager Application/ ISO ????/ IEEE ???? Layer 1/2 Physical Layer (PHY) w /MAC /LLC REFs ASTM XXXX Layers 3 7 Application Layer IEEE XXXX CHANNEL MANAGER System Management Entity (SME) ASTM YYYY GHz North American Architecture Specification ASTM ????A GHz Test Procedure Specification ASTM ????T Layer 2 Medium Access Control (MAC) IEEE Established Standards and procedures that are referenced as necessary Standards that must be modified or pleted Standards that must be written CORE DSRC ARCHITECTURE OTHER NETWORK INTERFACE EXISTING STANDARDS Layer 1 Physical Layer/ (PHY) IEEE Resource Manager Application/ Layers 37 IEEE 1455 DSRC CAPABILITIES SPECTRUM USED DATA RATE COVERAGE ALLOCATION STATUS INTERFERENCE POTENTIAL MAXIMUM RANGE CHANNEL CAPACITY POWER (Downlink) POWER (Uplink) 12 MHz ( to MHz) Mbps Large distances between munication zones No protection Many 900 MHz Phones, Many Rail Car AEI Readers, Many Spread Spectrum Devices, Wind Profile Radars 300 ft (at required 30 dBm sensitivity) 1 to 2 channels Nominally less than 40 dBm (10 W) Nominally less than 6 dBm ( 4mW) 75 MHz 6 Mbps 27 Mbps Overlapping munication zones needed and allowed Primary Status (high protection) Sparsely located Military Radars, Very Sparsely located Satellite Uplinks 1000 m (~ 3000 ft) 7 channels Nominally less than 33 dBm (2 W)* Nominally less than 33 dBm (2 W)* ITS RADIO SERVICE is the FCC Part 90 designation for the 915 MHz and GHz DSRC spectrum *Note As a special case up to dBm (30 W) may be use for qualified public safety applications. 902 928 MHz Band PARAMETERS 5850 5925 MHz Band (in the designated ITS RADIO SERVICE bands) GHz DSRC BASIC OPERATING FACTORS ? PUBLIC SAFETY and PRIVATE APPLICATIONS share the band ? INTEROPERABILITY ? LICENSED OPERATION ? PUBLIC SAFETY INSTALLATION PRIORITY ? NONMUTUAL EXCLUSIVITY FOR PRIVATE INSTALLATIONS ? LIMITED RANGE FOR PRIVATE OPERATIONS ? FREQUENCY COORDINATOR USED TO ASSIGN LICENSES CURRENT GHz DSRC STANDARD WRITING GROUP ACTIVITIES ? Developing usage rules and licensing procedure remendations for the FCC ? Expect to submit FCC rule remendations in April and June 2023 ? Developing the Final draft of the Physical and MAC Layer Standards ? Expected L1/L2 standard pletion in June 2023 NORTH AMERICAN GHz DSRC OPERATIONAL CONCEPT /BAND PLAN GHz DSRC OPERATIONAL CONCEPT INTRODUCTION GHz DSRC (Dedicated Short Range Communications) is a short to medium range munications service that supports both Public Safety and Private operations in roadside to vehicle and vehicle to vehicle munication environments. DSRC is meant to be a plement to cellular munications by providing very high data transfer rates in circumstances where minimizing latency in the munication link