A Simple and Robust EVH Algorithm for Modern Mobile Heterogeneous Networks- A MATLAB Approach

In Wireless Mobile Cellular Networks, users usually move between heterogeneous networks. In this type of environment, handoff procedure algorithm, handoff decision and its management is very important issue. Wireless Mobile Cellular Network supports the handoff process for users between various wireless technologies such as WLAN, CDMA and modern 3G networks. Heterogeneous networks are integrated in 4G wireless. To have seamless communication and mobility between these heterogeneous wireless access networks, support of vertical handoff (EVH) is required. Vertical handover is the convergence of heterogeneous networks for e.g.:handover process between wireless cellular networks and WLAN. In this paper one of the handoff algorithms is discussed for different path loss models. Actually, the requirement to initiate handoff arises when the Received Signal Strength of the current base station falls below the threshold value. It adaptively controls the handoff according to the requirements of cells [13] and [14]. In this paper a simple and robust EVH algorithm for handoff procedure is discussed. The algorithm considers the parameters for all the networks under evaluation and then decides about the handoff by comparing the minimum threshold parameters with the values of current network as well as next all possible networks. This algorithm supports better service quality for all kind of networks with almost zero Call Blocking Probability.