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Active device management for use in a building automation system

  • US 9,258,201 B2
  • Filed: 02/23/2010
  • Issued: 02/09/2016
  • Est. Priority Date: 02/23/2010
  • Status: Active Grant
First Claim
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1. A computer-implemented method for managing the connection status of a plurality of end devices in a building automation system (BAS) comprising:

  • providing a server engine communicatively coupled to the plurality of end devices by a network, the server engine including a connection manager;

    transmitting, by the connection manager, a first verify message to a one of the plurality of end devices via the network and incrementing a message count of the number of verify messages sent;

    waiting, by the connection manager, for a response to the verify message for a predefined wait-time period proportional to an amount of time the end device has been off-line, wherein the predefined wait-time period is defined by a decay algorithm including a plurality of states, at least some of the plurality of states each corresponding to a predefined range of time for which an end device is off-line;

    incrementing, by the connection manager, the wait-time period if no response to the verify message is received, checking if the message count has reached a maximum message value, transmitting another verify message if the maximum message value has not been reached;

    setting, by the connection manager, the wait-time period to a preconfigured minimum-time and clearing the message count if an affirmative response to the verify message is received; and

    discontinuing, by the connection manager, the transmission of verify messages to the one of the plurality of end devices if the message count has reached the maximum message value.

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