In the recent times the study of signal propagation models are under continuous reviewand currently a lot of work is being done on prediction of path losses associated with different kinds of environments, but the exactness of each model deployed is valid only for a small frame of fixed parameters which are the fundamentals of it. An exact radio propagation model is important for coping up with new challenges of the field of communication like: appropriate design, deployment, and service management strategies for any wireless network. It thereby becomes important for the purpose of signal coverage prediction, data reception, performance parameters, reception schemes, analysis of signal attenuation under different environments and in determination of the optimum location for the purpose of installation of base stations. Therefore the majorpurpose of this work is to survey various residential path loss prediction models along with few other models and to probe the accuracy of some widely used outdoor propagation models which are applicable for900MHz and 1800 MHz band such as Free space model, Egli model, Okumura model and COST 231 Hata model, ECC model, Bertoni's model on the interfacial regions of Dehradun. Probing studies requires field measurement which is done in the sub-urbanized zone of the concerned region. Some base stations operating at GSM 1800 MHz band were selected for the measurement in the particular area. Finally the models were verified against the field measurement in order to find out most suitable model for the region.

Radio TEMS Bertoni's model Fitting Residential scenario