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Selective activation of field devices in low power wireless mesh networks

  • US 7,986,657 B2
  • Filed: 01/11/2007
  • Issued: 07/26/2011
  • Est. Priority Date: 01/11/2006
  • Status: Active Grant
First Claim
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1. An industrial process control system comprising:

  • a host;

    a field device; and

    a wireless network for routing wireless messages between the host and the field device, the wireless network including a plurality of nodes and a gateway, wherein the gateway wirelessly communicates messages provided by the host to the nodes and controls an On/Off activation schedule of the nodes;

    wherein in response to a communication period initiated by the host with a selected field device, the node associated with the selected field device generates a command to operate the selected field device in a full power state; and

    wherein the node associated with the selected field device maintains the selected field device in the full power state through On/Off cycles of the activation schedule until communication between the host and the field device is complete, at which time the node generates a command to operate the selected field device in a low power state until a subsequent communication period initiated by the host.

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