International Journal of Engineering and Information Systems (IJEAIS)   Year: 2018 | Volume: 2 | Issue: 5 | Page No.: 9-12 Performance Evaluation of Handoff Call Arrival Rate in Microcell of GSM Networks by Hong and Rappaport Traffic Model Elsanosy M. Elamin, Abdelhakeem I. Fadol, Mustafa E. Alebed, Mohanad M. Hayber, Yaser M. Saeed Abstract: The handoff process is the main issue that associated with the unavailability of bandwidth when the subscriber moves from the serving cell to another new one with the new frequency and other different parameters. In turn, the handoff failure results in call drop and block. Therefore, it will probably affect the overall network performance negatively. So, other precaution has to be made for reducing the both call drop and block. In this paper, the mathematical Hong and Rappaport traffic model is carried out to evaluate the handoff calls arrival rate in microcell of the wireless network. It gives good results concerning the most affecting parameters that are positively and negatively affect the system performance. It is found that, the probability of a new call that is not blocked (Ph), the probability that a call been handoff successfully (Phh), and handoff arrival rate of anew calls (?o) are all directly assist in increasing the handoff calls arrival rate as they increase linearly. On the other hand, both the blocking probability (Bo) and the probability of handoff failure (P?f) are all affect the handoff calls arrival rate inversely. As they increase they will assist in decreasing the handoff calls arrival rate probability.