Abstract: A self-organizing network and method of operation includes a plurality of kindred nodes and, in some applications, a hub node communicating data packets from source nodes to destination nodes remote from the source nodes. Each data packet includes information (e.g. priority, number of hops, etc.) and packet handling commands. A source node receives data packets with the information and packet handling commands and adjusts its operation (e.g. transmitting power, frequency, bandwidth, etc.) in a way that allows the network to be self-organizing, self-configuring, and self-healing so that data packets are retransmitted from source nodes to destination nodes with a minimum of hops and delay.

Abstract: Method and apparatus is disclosed for detecting a security threat in a zone. A transmitter within the zone directs a first microwave signal of frequency f.sub.0 to a reflector. The reflector doubles the frequency to 2f.sub.0 and reradiates it to a receiver. The receiver correlates the reflected signal (phase and/or amplitude) with the transmitted signal and provides spectral data to a digital signal processor. A seismic sensor within the security zone also provides seismic spectral data to the digital signal processor whenever seismic disturbances are detected within the zone. The digital signal processor compares the spectral data with predetermined stored spectral data. Whenever both the reflector signal and the seismic signal spectra indicate a security threat within the zone, an alarm signal is output. Loss of reflector output plus adverse seismic spectral data may also trigger an alarm. The dual-sensor configuration reduces false alarms and circumvention of the detection system.