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© 2012 WIPRO LTD | WWW.WIPRO.COM1
MOST
AbMishra
Test Engineer
© 2012 WIPRO LTD | WWW.WIPRO.COM2
What is MOST
MOST History
MOST Devices
MOST Frames
VersionsS of Most
© 2012 WIPRO LTD | WWW.WIPRO.COM3
What is MOST
© 2012 WIPRO LTD | WWW.WIPRO.COM4
What is MOST
• MOST (Media Oriented Systems Transport) is a high-speed
multimedia network technology optimized by the automotive
industry. It can be used for applications inside or outside the
car. The serial MOST uses a ring topology and synchronous
data communication to transport audio, video, voice and data
signals.
• • A network can consist of up to 64 devices
• • Sample rates of 44.1 or 48 kHz
© 2012 WIPRO LTD | WWW.WIPRO.COM5
MOST device
A MOST device consists of three parts
1. Physical interface
2• Network Services
• - A Network Interface Controller (NIC) handles these
• services.
• Modern NICs have a built in processor and are
• called INICs, Intelligent NICs
3• Function Blocks (FBlocks)
• - These take care of the services that the device can supply
• A MOST device is not connected to a bus in the
• common sense. It has an inport and an outport and
• passes the information from the inport to the outport
© 2012 WIPRO LTD | WWW.WIPRO.COM6
MOST device
© 2012 WIPRO LTD | WWW.WIPRO.COM7
MOST device
© 2012 WIPRO LTD | WWW.WIPRO.COM8
FBlocks
• FBlocks can have functions with two different targets
• • The application
• . The MOST system (network)
• FBlocks can be of three types
• • Controllers
• • Slaves
• - Controls one or more FBlocks
• - FBlocks that are controlled by other FBlocks (Controllers)
• • The system network)
• • HMIs – Human Machine Interface
• - Used for the interaction between the user
• and the device
© 2012 WIPRO LTD | WWW.WIPRO.COM9
Communication between devices
© 2012 WIPRO LTD | WWW.WIPRO.COM10
Why MOST
1.high data rate transmission
2.lighter and more flexible compared to shielded electric data lines
3.does not cause any interference radiation
4.insensitive to electromagnetic interference irradiation
CAN (Controller Area Network), LIN (Local Interconnect Network)
and other automotive standards are not suitable because they are
too slow to carry video.
© 2012 WIPRO LTD | WWW.WIPRO.COM11
MOST Versions
MOST25
• Optical network with a bit rate of just under 25 Mbits/s
• • Sampling rate 44.1 or 48 kHz
• • Each frame consists of 512 Bits
• • A block consists of 16 frames
• • A frame can hold 60 Bytes of data
• • 24 – 60 Bytes of the data can be synchronous data
• • The rest of the 60 Bytes holds asynchronous data
• • On top of that the Control Channel can hold
• 2 Bytes of data
• • The total amount of Control Channel data (32 Bytes)
• is spread out over 16 frames (one block)
© 2012 WIPRO LTD | WWW.WIPRO.COM12
MOST Versions
• MOST50
• Optical or electrical network with a bit rate of just
• under 50 Mbits/s
• • Each frame consists of 1024 Bits
• • The frame can hold 117 Bytes of data
• • The border between synchronous and
• asynchronous data can change dynamically
• • Sampling rate 44.1 or 48 kHz
• • The Control Channel can hold 4 Bytes of data
• • The total amount of Control Channel data (64 Bytes)
• is spread out over 16 frames (one block)
© 2012 WIPRO LTD | WWW.WIPRO.COM13
MOST Versions
• MOST150
• MOST150 was introduced in October 2007 and provides a
physical layer to implement Ethernet in automobiles.
• MOST150’s advanced functions and enhanced bandwidth will
enable a multiplex network infrastructure capable of
transmitting all forms of infotainment data, including video,
throughout an automobile.
© 2012 WIPRO LTD | WWW.WIPRO.COM14
Further reading
• The MOST Specification can be downloaded from
• www.mostcooperation.com
• There you will also be able to download a more
• readable book on MOST
© 2012 WIPRO LTD | WWW.WIPRO.COM15
AbMishra
abhishek.mishra12@wipro.com

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What is MOST Technology: A Guide to the Media Oriented Systems Transport Protocol

  • 1. © 2012 WIPRO LTD | WWW.WIPRO.COM1 MOST AbMishra Test Engineer
  • 2. © 2012 WIPRO LTD | WWW.WIPRO.COM2 What is MOST MOST History MOST Devices MOST Frames VersionsS of Most
  • 3. © 2012 WIPRO LTD | WWW.WIPRO.COM3 What is MOST
  • 4. © 2012 WIPRO LTD | WWW.WIPRO.COM4 What is MOST • MOST (Media Oriented Systems Transport) is a high-speed multimedia network technology optimized by the automotive industry. It can be used for applications inside or outside the car. The serial MOST uses a ring topology and synchronous data communication to transport audio, video, voice and data signals. • • A network can consist of up to 64 devices • • Sample rates of 44.1 or 48 kHz
  • 5. © 2012 WIPRO LTD | WWW.WIPRO.COM5 MOST device A MOST device consists of three parts 1. Physical interface 2• Network Services • - A Network Interface Controller (NIC) handles these • services. • Modern NICs have a built in processor and are • called INICs, Intelligent NICs 3• Function Blocks (FBlocks) • - These take care of the services that the device can supply • A MOST device is not connected to a bus in the • common sense. It has an inport and an outport and • passes the information from the inport to the outport
  • 6. © 2012 WIPRO LTD | WWW.WIPRO.COM6 MOST device
  • 7. © 2012 WIPRO LTD | WWW.WIPRO.COM7 MOST device
  • 8. © 2012 WIPRO LTD | WWW.WIPRO.COM8 FBlocks • FBlocks can have functions with two different targets • • The application • . The MOST system (network) • FBlocks can be of three types • • Controllers • • Slaves • - Controls one or more FBlocks • - FBlocks that are controlled by other FBlocks (Controllers) • • The system network) • • HMIs – Human Machine Interface • - Used for the interaction between the user • and the device
  • 9. © 2012 WIPRO LTD | WWW.WIPRO.COM9 Communication between devices
  • 10. © 2012 WIPRO LTD | WWW.WIPRO.COM10 Why MOST 1.high data rate transmission 2.lighter and more flexible compared to shielded electric data lines 3.does not cause any interference radiation 4.insensitive to electromagnetic interference irradiation CAN (Controller Area Network), LIN (Local Interconnect Network) and other automotive standards are not suitable because they are too slow to carry video.
  • 11. © 2012 WIPRO LTD | WWW.WIPRO.COM11 MOST Versions MOST25 • Optical network with a bit rate of just under 25 Mbits/s • • Sampling rate 44.1 or 48 kHz • • Each frame consists of 512 Bits • • A block consists of 16 frames • • A frame can hold 60 Bytes of data • • 24 – 60 Bytes of the data can be synchronous data • • The rest of the 60 Bytes holds asynchronous data • • On top of that the Control Channel can hold • 2 Bytes of data • • The total amount of Control Channel data (32 Bytes) • is spread out over 16 frames (one block)
  • 12. © 2012 WIPRO LTD | WWW.WIPRO.COM12 MOST Versions • MOST50 • Optical or electrical network with a bit rate of just • under 50 Mbits/s • • Each frame consists of 1024 Bits • • The frame can hold 117 Bytes of data • • The border between synchronous and • asynchronous data can change dynamically • • Sampling rate 44.1 or 48 kHz • • The Control Channel can hold 4 Bytes of data • • The total amount of Control Channel data (64 Bytes) • is spread out over 16 frames (one block)
  • 13. © 2012 WIPRO LTD | WWW.WIPRO.COM13 MOST Versions • MOST150 • MOST150 was introduced in October 2007 and provides a physical layer to implement Ethernet in automobiles. • MOST150’s advanced functions and enhanced bandwidth will enable a multiplex network infrastructure capable of transmitting all forms of infotainment data, including video, throughout an automobile.
  • 14. © 2012 WIPRO LTD | WWW.WIPRO.COM14 Further reading • The MOST Specification can be downloaded from • www.mostcooperation.com • There you will also be able to download a more • readable book on MOST
  • 15. © 2012 WIPRO LTD | WWW.WIPRO.COM15 AbMishra abhishek.mishra12@wipro.com

Editor's Notes

  1. The below and following notes on the template slides are to guide you only. In your final presentation, you may delete these notes and add relevant notes if any. Title slide: Title – should not exceed beyond 3 lines, font size 30-34, Arial Bold (Font size for the title of the PPT can vary between 30-34, Arial, Bold depending on the amount of text, however should not be smaller than 30 font size) Name should not exceed beyond 1 line, Designation; font size to remain at 16, Arial normal Please keep the title slide simple, just the logo, title and name and designation to appear. No other graphic elements or any design, photograph, image can be added to this slide, alignment to remain the same
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  3. Section breaker slide: Used for a section heading. You may add a sub heading not exceeding one line also here Section heading – Arial, bold, 34 font size, should not exceed beyond 1 line Sub Head – Arial, normal, 20 font size, should not exceed beyond 1 line
  4. Content Slide: This is usually the most frequently used slide in every presentation. Use this slide for Text heavy slides. Text can only be used in bullet points Title Heading – font size 30, Arial bold Slide Content – Should not reduce beyond Arial font 16 If you need to use sub bullets please use the indent buttons located next to the bullets buttons in the tool bar and this will automatically provide you with the second, third, fourth & fifth level bullet styles and font sizes Please note you can also press the tab key to create the different levels of bulleted content
  5. Content Slide: This is usually the most frequently used slide in every presentation. Use this slide for Text heavy slides. Text can only be used in bullet points Title Heading – font size 30, Arial bold Slide Content – Should not reduce beyond Arial font 16 If you need to use sub bullets please use the indent buttons located next to the bullets buttons in the tool bar and this will automatically provide you with the second, third, fourth & fifth level bullet styles and font sizes Please note you can also press the tab key to create the different levels of bulleted content
  6. Content Slide: This is usually the most frequently used slide in every presentation. Use this slide for Text heavy slides. Text can only be used in bullet points Title Heading – font size 30, Arial bold Slide Content – Should not reduce beyond Arial font 16 If you need to use sub bullets please use the indent buttons located next to the bullets buttons in the tool bar and this will automatically provide you with the second, third, fourth & fifth level bullet styles and font sizes Please note you can also press the tab key to create the different levels of bulleted content
  7. Content Slide: This is usually the most frequently used slide in every presentation. Use this slide for Text heavy slides. Text can only be used in bullet points Title Heading – font size 30, Arial bold Slide Content – Should not reduce beyond Arial font 16 If you need to use sub bullets please use the indent buttons located next to the bullets buttons in the tool bar and this will automatically provide you with the second, third, fourth & fifth level bullet styles and font sizes Please note you can also press the tab key to create the different levels of bulleted content
  8. Thank you slide: Thankyou– font size 30, Arial Bold Name & Designation – font size 18, Arial normal Your/contact email id – font size 18, Arial normal