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WAVE : A Tutorial Roberto A. WAVE : A Tutorial Roberto A.

WAVE : A Tutorial Roberto A. - PowerPoint Presentation

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WAVE : A Tutorial Roberto A. - PPT Presentation

Uzcátegui Guillermo Acosta Marum IEEE Communications Magazine May 2009 1 Presenter Renato Iida Outline Introduction WAVE SYSTEM ARCHITECTURE PHY and MAC Layers Multichannel Operation ID: 713622

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Slide1

WAVE: A Tutorial

Roberto A. UzcáteguiGuillermo Acosta-MarumIEEE Communications Magazine ,May 2009

1

Presenter – Renato IidaSlide2

Outline

IntroductionWAVE SYSTEM ARCHITECTUREPHY and MAC LayersMultichannel OperationNetworking ServicesResource ManagerSecurity ServicesConcluding RemarksWAVE: A Tutorial

2Slide3

Introduction

Motivation and StandardsSlide4

Motivation

Intelligent Vehicle Highway Systems (IVHS) US,1991Increase safetyAmeliorate congestionReduce pollutionConserve fossil fuelDOT advices with Intelligent Transportation Society of America (ITSA)Created the intelligent transportation system [ITS

] in 1996http://www.its.dot.gov/

WAVE: A Tutorial4Slide5

Standard of WAVE

2004, IEEE create the network layers based on ITSA802.11p describe the PHY/MAC layerBased on 802.11aUses 5.85-5.925 GHz75 Mhz of spectrum 1609 describe the other layerDivided in 4 parts Wireless Access in

Vehicular Environments (WAVE) is the solution using both standards

WAVE: A Tutorial5Slide6

WAVE SYSTEM ARCHITECTURE

Types and elements6WAVE: A TutorialSlide7

Types of Networks

Vehicle-to-Vehicle(V2V)Connect between two or Onboard units (OBUs)Vehicle-to-Infrastructure(V2I)Connect between Onboard units (OBUs) and Roadside units (RSUs)Traditional Internet Access

WAVE: A Tutorial

7Slide8

Organization and Channels

Exchange information using control channel (CCH) and operates independentlyWAVE basic service setsSmall NetworkSimilar to 802.11 service setMix of OBU and RSUService channels (SCHs)WAVE: A Tutorial

8Slide9

Examples

WAVE: A Tutorial9

V2V

V2IInternetSlide10

PHY and MAC layers

802.11p10WAVE: A TutorialSlide11

Protocol Stack

WAVE: A Tutorial11

802.11pSlide12

Requirement

Longer ranges of operations (up to 1000m)The high speed of vehiclesExtreme multipath environmentsMultiple overlapping ad hoc with QoSSpecial beacon frameWAVE: A Tutorial

12Slide13

Implementation

10 Mhz channels , half of the 802.11aControl Channel and six service channelUnique ad hoc modeRandom MACHigh accuracy of RSSI16 QAM lower rate than 802.11aPriority controlPower Control

WAVE: A Tutorial

13Slide14

Multichannel Operation

Functional DescriptionSlide15

Protocol Stack

WAVE: A Tutorial15

1609.4Slide16

Elements of Multichannel Operation

Medium access using enhanced distributed channel access (EDCA) from 802.11eEnhancement to IEEE 802.11 MACManage channel coordination and to support MAC service data unit (MSDU)

WAVE: A Tutorial16Slide17

Services

Control channel data transferService channel data transferData transfer servicesControl priority of data packet (WSMP or IP)WAVE: A Tutorial

17Slide18

Functional Description

Management FramesWave announcement only in CCHOther IEEE management framesData FramesWave short message can be on CCH and SCHIP data frames only on SCHChannel Coordination using CCHFor each WBSS

WAVE: A Tutorial

18Slide19

Network Services

19WAVE: A TutorialSlide20

Protocol Stack

WAVE: A Tutorial20

1609.3Slide21

Data Plane Services

IPv6TCPUDPWSMPCapable of forward messageCheck integrity of the messageWAVE: A Tutorial

21Slide22

Management-Plane Services

Application registrationWBSS managementChannel usage monitoringIPv6 configurationReceived channel power indicator (RCPI) monitoringManagement information base (MIB) maintenance

WAVE: A Tutorial

22Slide23

Application Registration

All applications need to register with WAVE management entity [WME]Each application registers with a unique provider service identifier (PSID)Three tablesProviderServiceInfo – info about applications that provide serviceUserServiceInfo -applications residing

in the local unitApplicationStatus – Info about the applications

WAVE: A Tutorial23Slide24

WBSS Management

Link establishmentAddition or removal of applications from dynamic WBSSsInclusion (provider side) and retrieval (user side) of security credentialsWBSS termination Maintenance of the status of each application in the context of a particular WBSS

WAVE: A Tutorial

24Slide25

Channel Usage Monitoring

Mandate that WME tracks SCH usageThe standard don’t define how but need to choose a less congested channelWAVE: A Tutorial25Slide26

IPv6 Configuration

Controls the IPv6 connectionsWAVE: A Tutorial26Slide27

RCPI Monitoring

Any application can query a remote device about the strength of the received signalMLME that handle this requestWAVE: A Tutorial27Slide28

MIB Maintenance

The WME maintains a MIB that contains system-related and application-related informationExamplesNetwork InformationAddresses informationRegistration portAnd others

WAVE: A Tutorial28Slide29

Resource Manager

29WAVE: A TutorialSlide30

Protocol Stack

WAVE: A Tutorial30

1609.1Slide31

Elements in the network

WAVE: A Tutorial31

RM have a resource command processor (RCP) RPC executes the command inside the RM on behalf of RMASlide32

Inside the OBU/RSU

WAVE: A Tutorial32Slide33

Security Services

33WAVE: A TutorialSlide34

Protocol Stack

WAVE: A Tutorial34

1609.2Slide35

Symmetric Algorithms

How it can be usedEncrypted-onlyAuthenticated-onlyBothUse Message Integrity Check (MIC)Algorithm CBC AES-CCMWAVE: A Tutorial

35Slide36

Remaining Algorithms

Support Asymmetric KeysUser SHA1 for hash functionsDon’t guarantee anonymous header in the broadcast messages WAVE: A Tutorial36Slide37

Hash Function

Use to create the MICUses SHA-1WAVE: A Tutorial37Slide38

Conclusions

Show how WAVE fit in a OSI modelBased on well-known solution of 802.11Test of ITS were on going in California,Michigan, New York and VirginiaWAVE: A Tutorial

38Slide39

Extra

https://www.udacity.com/course/applied-cryptography--cs387WAVE: A Tutorial39