Target Tracking

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In Smart/Green buildings of the Future Internet one of the core services required for multiple applications is target tracking. Target tracking can be used for:

  •  emergency management scenarios where people have to be localised and guided towards safe exits
  •  building security where intruders need to be localised by the system 
  •  access management and access provisioning
  •  localisation and usage history of valuable assets

The intuition behind the algorithm is to passively track a target with the use of traces that span efficiently throughout the WSN topology. The algorithms consists of the following states:

    
  •  Target detection: when a sensor node detects the target in its vicinity, it initiates a new trace of type initial 
  •  Trace spread: the sensor network spreads traces across the network in such a way that the tracking agent will be capable of using those traces to track down the target 
  •  Spread inhibition mechanism: mechanism to stop spreading duplicate traces 
  •  Tracking: a tracking agent (i.e. a process) walks the network until it finds a trace. Keeps following the trace until it finds the target.
The algorithm has been evaluated for four scenaria:

Detailed performance results have been derived:

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