(Dedicated Short Range Communication, DSRC)

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OutlineIntroductionWAVE1609.3WAVE1609.4

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IntroductionDSRC5.9GHz DSRCMACPHYIEEE802.11p.802.11pIEEE2003802.11aWAVE(Wireless Access in the Vehicular Environment)DSRC**

IntroductionITSDSRC**

Introduction: Bluetooth (BT), Ultra-wideband (UWB)

: 2G, 2.5G, 3G, 3.5G (cellular systems), GPS, WiMAX

: Microwave, Infrared, Dedicated Short Range Communications (DSRC), Wi-Fi

: Microwave, Infrared, DSRC

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Introduction**

Introduction(microwave)(infrared)(radio frequency, e.g. DSRC)

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Introduction(V2R, OBU-to-RSURSU-to-OBU)

(V2V, OBU-to-OBU)**

DSRC **()

()**

(BT) WPAN: 110 m 720 kbps 3 Mbps (UWB) WPAN: a. 13 m, b. 310 m a. 480 Mbps,b. 110 Mbps

() **

WiMAX WMAN: 350 kmmobile: 215 Mbps static(fixed): 70 Mbps (cellular systems) WWAN: 35 km120 km 2.5G: 114 kbps3G: 384 kbps3.5G: 7.2 Mbps GPSWWAN: 20000 km 9.6 kbps

() **

(V2R) 1050 m (depend on power) kbps 1050 m (line-of-sight) kbps

Wi-Fi WLAN: 10100 m ideal: a: 54Mbps11b: 11 Mbps11g: 54 Mbps DSRC WLAN: 3001000 m mobile: 327 Mbps

() **

(V2V) 1050 m (depend on power) kbps 1050 m (line-of-sight) kbps DSRCWLAN: 3001000 m mobile: 327 Mbps

DSRC/WAVE **

DSRC/WAVE **

Vehicle to vehicle

Service channel

Service channel

Control channel

Intersection

IEEE1609-SponsorThe Intelligent Transportation Systems ITSCommittee of the IEEE Vehicular Technology Society VTS DOT ITS ProgramDepartment of Transportation DOT Major Objective on ITSIntelligent Infrastructure, IFIntelligent Vehicles, IV

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*IEEE 1609WAVE NetworkV to VV to ROnboard Unit OBU Roadside Unit RSU IEEE 1609 Source: http://3fire.blogspot.com/2007/06/wave-ieee-1609.html *

*WMEUDP/TCPWSMPLLC WAVE MACWAVE PhysicalManagement planeData planeWAVE Protocol Stack ModelIPv61609.3MLMEPLMEMulti-channel operation1609.41609.3802.11p802.2Application1609.1Application Presentation SessionNetworkData LinkPhysicalTransportOSI Reference Model802.11SecurityServices1609.2*

*IEEE 1609.1IEEE 1609.1 : resource manager IEEE 1609.1 WAVE DSRC WAVE (OBU) (RSU) WAVE

*

*IEEE 1609.2IEEE 1609.2 : secure message formats to process secure messages of the DSRC/WAVE DSRC WAVE

WAVE*

*IEEE 1609.3IEEE 1609.3 : network services WAVE WAVE WAVE OSI IEEE 1609.3 IPv6 WAVE short message (WSM)

*

*IEEE1069.3 Protocol Stack Model*non-IP based

*WAVE network services (1/3)IEEE 1609.3 WAVE

IEEE 1609.3 5.9GHz DSRC/WAVE *

*WAVE network services (2/3) WAVE Data Plane() UDP (TCP)IPv6 WAVE Short Message (WSM) Protocol (WSMP)

*

*WAVE network services (3/3)Management Plane()(WAVE basic service set ,WBSS)IPv6 *

*Communication protocols (1/2)Channel typesCCH (single control channel)shorthigh-priority application system control message SCH (multiple service channel)*

*Communication protocols (2/2)WAVE Short Message Protocol (WSMP)WAVE (CCH or SCH) PHY()

IPv6SCH *

*WAVE Service Information Element (WSIE)Reference by IEEE 1609.3*

*IEEE 1609.4Discuss the WAVE multi-channel operationsMAC (Control Channel, CCH) (Service Channels, SCH) ()

*

*Reference ModelWMEUDP/TCPWSMPLLCWAVE MAC with channel coordinationWAVE PhysicalManagement planeData planeIPv6MLMEPLMEApplicationFocus of enhancementsSpecified by this standard*

*General DescriptionWAVE devices (OBU or RSU) provide an architecture that supports a single CCH and multiple SCHs.CCHWSMWAVESCHs*

*Provide FunctionsChannel routingRouting for WSMP dataRouting for IP datagramUser priority (UP)Channel coordination*

*Routing for WSMP data (1/2) WSMP header contains the channel, power level, and data rate*

*Routing for WSMP data (2/2) Routing Script Scenario WSMP data LLC MAC MAC buffer WSMP header channel number WSMP header channel number channel number CCH number SCH number

*

*Routing for IP packet (1/2) IP MLME SCH numberpower leveldata rate power level data rate

IP LLC MACMACSCH*

*Routing for IP diagrams (2/2)Data shall be discarded WAVE WBSS (WAVE basic service set)

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*User priority (1/2)IEEE 1609 IEEE 802.11e (Enhanced Distributed Channel Access mechanism EDCA) EDCA Arbitration inter-frame space (AIFS)Contention window (CW)Transmit opportunity (TXOP) limit*

*User priority (2/2) Channel (MAC)LLCPHYMACACI = 0ACI = 1ACI = 2Transmit QueuesAIFS[ACI]CW[ACI]TXOP[ACI]Internal ContentionMedium ContentionSource : IEEE 1609.4AIFS[ACI]CW[ACI]TXOP[ACI]AIFS[ACI]CW[ACI]TXOP[ACI]ACI = 3AIFS[ACI]CW[ACI]TXOP[ACI]Pre-queue channel access functions*

*Channel coordinationSource: IEEE 1609.4Sync IntervalCCH IntervalSCH IntervalGuard Interval*

*Transmit operations*

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-**ITS

* ***WPANwireless personal area network*WWAN*WLANwireless local area networkline-of-sight*DSRC/WAVEIPIEEE1609.3/WAVE Short Message ProtocolIPv6 *802.11pIEEE 802.11a802.11p710MHz5.9GHz

*IEEE 1609 (Department of Transportation, DOT) ITS (Intelligent Transportation System) DOT ITS ITS- (Intelligent Infrastructure IF)- (Intelligent Vehicles IV)

**WAVE (Wireless Access in Vehicular Environment) IF (Intelligent Infrastructure) IV (Intelligent Vehicles) IF WAVE IV IVIVWAVEWAVE IF IV IV IV IEEE 1609 WAVE Roadside unit Onboard unit Roadside unit Onboard unit *IEEE1609 IEEE 1609 5.9 GHz IEEE 802.11 802.11p IPv6

IETF (Internet Engineering Task Force) WAVE LLC (Logical Link Control ) -- IEEE 802.2LLCMAC (Medium Access Control) -- PHY (Physical Layer) -- WME (WAVE Management EntityWAVE )MLME (MAC Layer Management Entity)PLME (Physical Layer Management Entity)WSMP (WAVE Short Message ProtocolWAVE )MAC sublayer management entity (MLME)physical sublayer management entity (MLME)

****IEEE 1609.3 WAVE system IP non-IP based non-IP basedWSMPIEEE 1609.3 WAVE WME MIB LLCUDP/TCPWSMP *

*** WAVE-- WSMP IPv6- CCH - SCH *WAVE- WSMP WSMPWSMPWAVE (CCH or SCH) PHY()WSMsMAC addressbroadcast addressWSMs PSID WSMs - IPv6SCH *WSIE WAVEWMEProvider Service InfoChannel InfoWAVE Routing Advertisement WRA()WAVE Service Advertisement WSA IEEE 1609.2Security HeaderTrailerSecured WSApackageMLME-WSA.requestMLMEMLMEtiming quality headerWSIEMAC header trailer **IEEE 1609.4 MLME WAVE MAC with channel coordination MLME MAC (MAC sublayer management entity) (multi-channel) IEEE 802.11 MACLLC (logical link control IEEE802.2) PHY (IEEE P802.11p)

*WAVE (OBU RSU) (CCH) (SCH) - (CCH)WSMWAVE- (SCH)

*IEEE 1609.4 MAC

*WSMP (WAVE short message protocol) data WSMP header , Channel numberPower level Data rate1 octet = 8

*WSMP (WAVE short message protocol) data 1. WSMP data LLC MAC 2. MAC buffer WSMP header channel number3. WSMP header channel number channel number CCH number SCH number* IP IP MLME SCH numberpower leveldata rate power level data rateIP LLC MACMACSCH

* WAVE WBSS (WAVE basic service set) WBSSWAVESCH

* IEEE 1609.4 (User priority) IEEE 1609 IEEE 802.11e (Enhanced Distributed Channel Access mechanism EDCA) IEEE 802.11 EDCA - (Arbitration inter-frame spaceAIFS)- (Contention windowCW)- (Transmit opportunity (TXOP) limit) TXOPlimit =0MSDU

* Channel (PHY) MSDU MAC Channel routing MAC (ACI) (back-off)

* (Channel coordination) MAC MAC CCH SCH (Guard Interval) ()

* IEEE 1609.4 1.IP WSM 2. LLC MACMSDUMAC EtherType IP or WSMP (1) WSMPWSMP headerchannel number MSDU ACUP (2) IP MSDU SCHAC UP UP MSDU channel buffer3.channel (1) WSMPheader transmit powerdata rate (2) IPtransmitter profile transmit powerdata rate4. Power level data rate TXVECTOR IEEE 802.115.PHYclear channel MAC IDLEMACTXVECTORPHYPower level data rate6.PHYPHY(7) LLC MAC ITS1986U. C. BerkeleyPATHVIIGMV2VIVBSS(Integrated Vehicle-Based Safety System)CICAS(Cooperative Intersection Collision Avoidance System)VII(Vehicle Infrastructure Integration)(Vehicle Safety Communication Consortium, VSCC)*ITS1970ASV(Advanced Safety Vehicle)AHS(Advanced cruise-assisted Highway System)*FleetNetIVHW (Inter-Vehicle Hazard Warning)CarTALK 2000WILLWARN (Wireless Local Danger Warning)COMeSafetyIntelligent Car Initiative2003 (C2C-CC, Car-to-Car Communication Consortium)*