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Many question of Associate-Join model of z-stack

Aries Lord
Genius 5390 points
Other Parts Discussed in Thread: Z-STACK

1,Assoc-Join is a MAC-layer movement.An un-joined nod either FFD or RFD  will send Assoc-Req to Parent(Coord),and Parent alloc 16bit address for it and send by indirect model.In TI-MAC and Z-stack,the Nod will send Data-req to Parent at 490ms after sending Assoc-Req.But in this 490ms,the RFD can only turn-off RXON,but can't turn-off CPU,so I can measures that current of FFD in this 490ms is 8mA.It's too high,how to cut-down it.

2,When many nod send Assoc-Req to a same Parent,the Parent will send Assoc-Rsp by indirect model,that mean the Assoc-Rsp will cost Buffer of Parent.I wonder how many Assoc-Rsp can be buffered?

3,Can nods avoid to associate with the parent that has buffered many other nods's Assoc-Rsp.

  • 0
    TI__Mastermind 35795 points

    Hi,

    Data request rate from end device is programmable  , and during that period device can go to very low power state PM2. Please refer to document http://www.ti.com/lit/an/swra292/swra292.pdf .  Power profile is calculated for device during normal operation and not for specific associate req/rsp scenario. All routers are programmed to have max number of child nodes, and in case list is full it will return an error in response. Are you facing a specific issue?

    Saurabh

  • 0 in reply to S
    Genius 5390 points

    My mean is not data request after joined.I have tested that when a NOD  has sent a Assoc-Request to parent,it could not go to PM2 until receive Assoc-Response.Though it receive Assoc-Response by indirect model.

  • 0 in reply to Aries Lord
    Guru 735685 points

    When device sends a Assoc-Request, it has to keep RX on for a while to wait Assoc-Response. Until time out, device won't go to PM2.