1. A method of tracking target objects in a network of unidirectional sensors which correspond to nodes on the network, the method comprising identifying the presence of a target object by a first unidirectional sensor, determining a first criteria for the relationship of the target object to the first unidirectional sensor, sending a message to at least one second unidirectional sensor which is a neighbor to the first unidirectional sensor, the message including a unique identification of the target object and the first criteria, monitoring messages from at least one second unidirectional sensor sending a second criteria indicative of the relationship of the target object to the at least one second unidirectional sensor, ranking the first criteria and second criteria, if available, and the first unidirectional sensor utilizing the ranking of the first and second criteria to determine whether to elect itself the head of a cluster including at least the first unidirectional sensor or join a cluster headed by a second unidirectional sensor.