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June 2009 John Moring

June 2009 John Moring . Overview IEEE 1609.0, 1609.3, 1609.4, 1609.5. Contents. Standards Overview IEEE P802.11p WAVE MAC and PHY IEEE 1609.4 Multi-Channel Operation IEEE 1609.3 Networking Services. WAVE Scope. Protocol Architecture. Trial Use Standards. IEEE Std 1609.1-2006

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June 2009 John Moring

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  1. June 2009John Moring Overview IEEE 1609.0, 1609.3, 1609.4, 1609.5

  2. Contents • Standards Overview • IEEE P802.11p WAVE MAC and PHY • IEEE 1609.4 Multi-Channel Operation • IEEE 1609.3 Networking Services

  3. WAVE Scope

  4. Protocol Architecture

  5. Trial Use Standards • IEEE Std 1609.1-2006 • Resource Manager • IEEE Std 1609.2-2006 • Security Services • IEEE Std 1609.3-2007 • Networking Services • IEEE Std 1609.4-2006 • Multi-Channel Operation • IEEE P802.11p - draft • WAVE MAC and PHY • IEEE Std 802.11-1999 • MAC and PHY

  6. Full Use Standards in process

  7. Ongoing Standards Activities • IEEE P802.11p work continues • Full Use 1609 updates in process • 1609.2, 1609.3, 1609.4 • Resource Manager standard being redefined to address low-end devices • 1609.1 • Architecture document in process • 1609.0 • Communications Manager standard authorized • 1609.5; placeholder for possible future work • Electronic payment services standard in process • 1609.11

  8. Overview of 802.11p (D7.0) • Specifies channelization in the 5.9 GHz band • Tunes some RF specs to allow highway operation • Defines a mode of operation “outside the context of a basic service set” • Removes latency-causing link setup operations such as authentication • Defines a Time Advertisement message

  9. Overview of 1609.4 Multi-Channel Operation • Extensions to the 802.11/802.11p MAC • Management plane (MLME: MAC SubLayer Management Entity) • Manages optional regular switching between control channel and service channel • Queues regular time advertisements and/or service advertisements • Data plane (MAC) • Multiplexes/demultiplexes higher layer protocols (IPv6, WSMP) • Queues messages for transmission on the correct channels • Manages transmit message priority

  10. Continuous access Alternating access Immediate access Extended access 1609 Channel Coordination examples Control Channel: management and (high priority) messages Service Channel: general user message and IP traffic For devices that don’t need continuous CCH access

  11. 1609.4 Transmit Operation

  12. Overview of 1609.3 Networking Services • Management plane (WME: WAVE Management Entity) • Generates contents of service advertisements based on higher layer info • Including IP configuration info and security credentials • Monitors received service advertisements for services of interest to higher layers • Estimates channel quality • Determines channel allocation/switching schedule to satisfy service requests • Data plane • Incorporates standard LLC and IPv6 • Introduces thin WAVE Short Message Protocol (WSMP) • Allows direct control of RF parameters (e.g., power, data rate) by the higher layer

  13. WAVE Short Message Protocol (WSMP) • Messages transmitted on request by higher layer • Dest. MAC address, User Priority, Channel, Data rate, Transmit Power, PSID • Messages delivered over the air by MAC address • Unicast or broadcast • Messages delivered up the stack by protocol and PSID • EtherType distinguishes WSMP from IP

  14. “Services” • Provider role • Sends out WAVE Service Advertisements (WSAs) on control channel • Includes info on services and channels • May include IP configuration info • In Trial Use, included timing info – now separate • Operates on identified service channel(s) at designated times for application data exchange • User role • Monitors WSAs for services of interest • May visit identified service channels at designated times for application data exchange • Allocation of radio resources to communication channels performed by 1609 stack based on higher layer request priority, service availability, device capabilities

  15. KEY Optional Extension fields Lengths in octets WAVE Service Advertisement (WSA) contents Transmit Power Used 2D/3D Location Advertiser Identifier IP configuration info Secondary DNS Info about available services Info about service channels PSC IPv6 Address Service Port Provider MAC Address EDCA Parameter Set

  16. This illustrates content from the higher layers, processed by the WAVE stack, and sent out as a service advertisement in an 802.11 frame Example of WAVE Transmit Protocol Layers IEEE 1609 IEEE 802.11

  17. WSA Flow, allows devices to coordinate SCH usage for data exchange

  18. PSID & PSC • Provider Service Identifier (PSID) • 4 octets; values allocated by IEEE • Used as WSMP recipient address, and • Used as primary identifier of services in WAVE Service Advertisement • Presumably identifies type of information and encoding to be found on the SCH • Provider Service Context (PSC) • 0-32 octets; meaning determined by PSID • Used as optional secondary service descriptor in WSA • May indicate information sub-type, date tag, security context, etc.

  19. Going Forward • Core WAVE standards: 802.11p, 1609.4, 1609.3, 1609.0 • Expect technical work to finalize this year • Standards published by mid-2010 • Work on other standards proceeding

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