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How mesh , Star networks are formed in Zigbee profile

John Flanno
Intellectual 635 points

Other Parts Discussed in Thread: Z-STACK

I'm a beginner with zigbee . I wish to know how mesh , star networking are done in zigbee? How cluster communicates . I read drew gialson book it doesn't provide these answers . Can someone guide me regarding this . I also wish to know is it possible to form mesh, star networks in a single PAN? How these are formed
  • 0
    Guru 31280 points

    Hi John,
     

    • I would like to recommend you to start with this book - "ZigBee Wireless Networks and
      Transceivers Sep 2008" by Shahin Farahani.
       
    • TI's ZigBee stack (Z-stack) is mesh only.
       
    • You may also refer to "Z-stack Developer's Guide.pdf" (attached), this document comes with
      Z-stack distribution.
       

    6431.Z-Stack Developer's Guide.pdf


    Good luck :)

  • 0 in reply to Igor Sherer
    Intellectual 635 points

    Thank you for the answer . I still have another doubt . I wish to know how the network decides it will connect through mesh here , through star here etc? I wish to know the mechanism , Say for example A co-ordinator has four routers . One in South West of co-ordinator(c) , one in SE of C , One in North West of C and other in NE of C. Each router has 5 childs . I believe it will connect in a cluster tree formation here no? Then routers will connect through star . I wish to know how it decides it will connect in a such a way . I'm just assuming . It will connect . Since ED(child of routers) wont be in proximity of c0-ordinator it wont be mesh. How the meachanism works

    P.S thanks for the reply . Not many online guidance available for zigbee . Much appreciated

  • 0 in reply to John Flanno
    Guru 31280 points

    Generally speaking the decision of joining is based on LQI (link quality)

    The network is a mesh, not star, in a sense of each node in a network is

    allowed to communicate with all the other nodes, be it router or End Device

    (each one of them).

    May be I'm missing some point?

  • 0 in reply to Igor Sherer
    Intellectual 635 points

    End device in Router(NW) R1 cannot communicate with R2? So its not mesh no? How is star topology determined? By using hierarchial relationship? (i.e) An end device can communicate with a co-ordinator through router only?