ISM transmitter density estimation for telemetry sensors in high rise apartment buildings

Constrained wireless sensor nodes in dense high rise buildings encounter negative effects from the industrial, scientific and medical (ISM) radio band interference and collisions. A method of wireless sensor density estimation is proposed as an experiment. An experimental analysis of frequency channel structure is tested and a feasible modulation and data structure is proposed to maximize sensor node life expectancy and the upper limits of node density is estimated. The target applications of the transmitters are energy (heating, water supply infrastructure, electricity monitoring) and environment parameters - moisture, CO2, air temperature.