Design and Algorithm Study of Propagation Model in Fire Network

In order to solve the fire command network communication problems not be guaranteed when fire forces implement fire rescue in a building, fire command network radio propagation model is designed and algorithm is investigated. First, the research is conducted from the fire fighting and rescue emergency communication security status and characteristics of building fire, introduced the ITU-R indoor propagation model and Keenan-motley indoor propagation model. Then, using different frequencies experimental statistics of radio waves, we got the attenuation model results of interior building penetration. Finally, we established the attenuation model for the building penetration and wave field strength and level calculation. Several experimental results show that for the same building, using the frequency of 2.4GHz, 17dBm transmit power of the base station, we deploy single point and multi-point base stations to achieve signal coverage inside building, the measurement results which is obtained from spectrum analyzer shows that reception field strength of the signal can be achieved 97% ~ 99% at several predetermined monitoring. It can satisfy the communication support requirements of fire forces rescue.