Link budget analysis in the network designed mobile WiMAX technology in the territory of the urban area of the city of Gjakova Shkelzen S. Nuza 1 , Artan Z. Mazrekaj 2 1 Department of Engineering Informatics, Faculty of Applied Technical Sciences, University of Prishtina Mitrovica, 40000, Kosovo 2 Department of Computer Engineering, Faculty of Electrical and Computer Engineering, University of Prishtina Prishtina, 10000, Kosovo Abstract Wireless communication has now entered the second century of its use and has valuable merits of improving the quality of life of all mankind. Technologies for wireless and mobile communications are replaced every 2-3 years. The current version of the Protocol provides Internet access up to 40 Mbps and this version is expected to increase the bandwidth. The telecommunications sector leaves much to be desired in improving service quality. This paper presents the possibilities of implementation of WiMAX technology in the territory of Gjakova. Also, here are discussed some aspects of mobile network on calculating the budget link of the mobile network with WiMAX technology. Calculating the link budget, the radius of cell to a base station in urban areas is about 0.6 km. In the planning area and the frequency band of 3.5GHz, with channel width of 5 MHz TDD and spectrum 30MHz. The link margin used in this case is 133.5 dB. Keywords: Link, Budget link, Mobile, WiMAX, Antenna, 1. Introduction In wireless environments, link budget (measured in dB) and spectral efficiency are the two primary parameters used for evaluating system performance. Here we will deal with the link budget, which will be to study the link budget parameters for network expansion in the urban environment in the planning area of Gjakova [1], and the frequency band of 3.5GHz, with channel width of 5 MHz TDD and 30MHz spectrum. 2. What is a link A link is an interconnecting circuit between two or more locations for the purpose of transmitting and receiving data. A link equation is given by: [2] P received = Power of the transmitter + Gain of the transmitting antenna + Gain of the Receiving antenna – Sum of all losses 3. Link Budget Link budget analysis should be performed prior to entering the network [3].We discuss the calculation of the link budget, which indicates to what extent the signal may weaken (Figure 1). Then, a propagation model is proposed to determine the range, by taking into account the link budget. Based on this range, we illustrate the calculation of the cell coverage area [2]. In a next step, we calculate the bit rate per cell sector and finally, the cell areas and bit rates are combined to estimate the required number of base stations. Link budget analysis takes into account factors such as path loss, receiver sensitivity, noise, enforcement and losses from the antennas and cables. Link budget analysis results in a power transmission required to achieve a given BER advance. The link budget is analyzed using the model of the waves spread known as Hata COST 231, taking the values of the parameters of the transmission system[4]. Fig. 1 Link-budget for downlink [2] IJCSI International Journal of Computer Science Issues, Vol. 9, Issue 5, No 2, September 2012 ISSN (Online): 1694-0814 www.IJCSI.org 357 Copyright (c) 2012 International Journal of Computer Science Issues. All Rights Reserved.