4G WiMax offers a new parading regards to the way that the traditional wireless network systems have been designed all this happens due to the impact generating by technology in society and its impact in environmental ambient intelligence such smart cities (Sidi Bouzid area). the fundamental technological advantages of 4G WiMax superior radio technological advantages of 4G WiMax superior radio technology built in QOS and security, and an open IP-based access network infrastructure. This technology can be used for a number of applications, including "last mile" broadband connections, hotsposts and high speed connectivity for business customers. The objective of this article is to propose an approach to design a network on the latest standard of WiMax namely (802.16m), and to use it dimensioning and planning such network in Sidi-Bouzid area in order to optimize interferences, noise and to avoide cutout. In this article review of WiMax technology was given, followed by its standard with focusing on 802.16m standard. A design approach was developed to help network planner in their work to achieve the smart city in Sidi Bouzid of communications, this approach was summarized in a simple flow chart. As a case study, a network based on this technology was designed for Sidi Bouzid area. The number of subscriber was calculated for each district area and plotted in a clutter map. The Building Penetration Losses for each type of area were modeled using several measurements conducted as a part of this work, in fact we tried to minimize the noise and evry kind of interference. The design outcome (number of base station and there distribution) where found less than the existing ones in the operating network.