CSCE 3612 ch8-1

CSCE 3612 ch8-1 - Networking for Embedded Systems Why we...

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© 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. Networking for Embedded Systems Why we use networks. Network abstractions. Example networks.
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© 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. Network elements PE PE PE network communication link distributed computing platform: PEs may be CPUs or ASICs.
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© 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. Networks in embedded systems PE PE sensor PE actuator initial processing more processing
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© 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. Why distributed? Higher performance at lower cost. Physically distributed activities---time  constants may not allow transmission to  central site. Improved debugging---use one CPU in  network to debug others. May buy subsystems that have embedded  processors.
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© 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. Network abstractions International Standards Organization  (ISO) developed the  Open Systems  Interconnection  ( OSI ) model to describe  networks: 7-layer model. Provides a standard way to classify  network components and operations.
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© 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. OSI model physical mechanical, electrical data link reliable data transport network end-to-end service transport connections presentation data format session application dialog control application end-use interface
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© 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. OSI layers Physical : connectors, bit formats, etc.
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CSCE 3612 ch8-1 - Networking for Embedded Systems Why we...

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