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Protocol for secure and energy-efficient reprogramming of wireless multi-hop sensor networks

  • US 8,107,397 B1
  • Filed: 06/05/2007
  • Issued: 01/31/2012
  • Est. Priority Date: 06/05/2006
  • Status: Active Grant
First Claim
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1. A method of multi-hop reprogramming for a wireless sensor network using a three-way handshake protocol for transfer of new code, said handshake protocol including advertising, request and data transfer messages, said network having at least one originator and a plurality of sensor nodes, said method comprising:

  • propagating a warning message containing information about the nature of new code to be transmitted, said warning message including network topology information indicative of the routing of the warning message from the originator;

    at each node which receives the warning message, estimating the propagation time from the originator based on the network topology information contained in said warning message and, based on the propagation time length, conditionally disabling RF circuitry to reduce power consumption during a corresponding sleep period;

    each node updating the network topology information indicative of the routing of said warning message and forwarding the updated warning message to other nodes in the network; and

    each node waking up at the end of said sleep period and initiating a three-way handshake protocol for transfer of code, said node receiving advertising messages from other nodes relating to new code, sending request messages for needed code, receiving needed code, and sending advertising messages to other nodes in the network relating to received code.

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