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Industrial_wireless_networks.ppt

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					King Fahd University of Petroleum and Minerals

                EE- 400
          Communication Networks

         Wireless Industrial Networks
            (Wireless HART)


                 Prepared For
             Dr. Samir Ghadhban

                  Done By

     Khalil Al-Saedi        ID # 233263
     Ali Al-Ojaimi          ID # 233535
                  OUTLINES
   INTRODUCTION
   NETWORK ARCHITICTURE
   LAYERS SPECIFICATIONS
     Physical Layer
     Data-Link Layer
     Network Layer
     Transport Layer
     Application Layer

   CONCLUSION
            INTRODUCTION


   Wireless HART is a Wireless Mesh Network
    Communications Protocol.

   designed to meet the needs for process
    automation applications.
            INTRODUCTION

   Wireless HART is a key part of the HART Field
    Communications Protocol Revision 7



   Existing HART applications (e.g., control
    systems, PLC's, maintenance tools, and asset
    management applications)
     NETWORK ARCHITICTURE

   Wireless HART Field Devices (WFD):

       connected to the process or to plant equipment
     NETWORK ARCHITICTURE
   Wireless HART Gateways:

     enable communication between Host Applications
      and WFD
     support one or more Access Points

     A Gateway and its Access Points must included in
      every Wireless HART network
     NETWORK ARCHITICTURE
   A Wireless HART Network Manager:

     responsible for configuration of the network
     scheduling communication between Wireless HART
      devices (e.g., configuring super frames)
     management of the routing tables

     monitoring and reporting the health of the Wireless
      HART Network
NETWORK ARCHITICTURE
     LAYERS SPECIFICATIONS
   Physical Layer:

     Maximum data rate (250 kbps).
     Operating Frequency (2.4 - 2.48 GHz).

     O-QPSK modulation and Direct Sequence Spread
      Spectrum (DSSS).
     transmit Power is 10dBm.
    LAYERS SPECIFICATIONS
   Data-Link Layer:
     Wireless HART DLPDU (Data Link Protocol Data
      Unit) specifies a byte which identifies Wireless HART
      packet types.
     TDMA using timeslots organized into super frames
      as 100 timeslots per second depending on the
      bandwidth.
     Link between devices specified by super frames,
      timeslots and channel offset.
    LAYERS SPECIFICATIONS
   Network Layer:

       Devices support routing and broudcast.

       Request bandwidth.

       Configure the shared slots and blocking
        transmission.
    LAYERS SPECIFICATIONS
   Transport Layer:

       provides end-end acknowledgement of
        communications.

       Acknowledged transmissions include automatic
        retransmission to confirm successful data transfer.

       Supports TCP-like reliable blocking for transmission
        of large data sets.
     LAYERS SPECIFICATIONS
   Application Layer:

     Device   status for quality process.

     Commands     aggregation for multiple
      command.
              CONCLUSION
   Wireless HART provides new capabilities and
    more secure process.

   The HART technology becomes the leader of
    the wireless industrial networks.
                             REFERENCES
1)
http://www.pepperl-
fuchs.com/selector/navi/productInfo/doct/tdoct1535__eng.pdf;jsessionid=C3FB6B5B6DCA2903B8DAB2F
A5610A903
2)
http://wireless.industrial-networking.com/articles/articledisplay.asp?id=14

3) http://www.globalspec.com/FeaturedProducts/Detail/Wireless_HART_Gateway/33442/0

4)
http://www.cds.caltech.edu/~shiling/wirelesshart_datasheet.pdf

5)
http://portal.etsi.org/Docbox/Workshop/2008/200812_WIRELESSFACTORY/HARTFOUNDATION_Griess
mann.pdf

				
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