Evaluation of 5G Cellular Network Implementation Over an Existing LTE One (original) (raw)
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On Coverage Analysis for LTE-A Cellular Networks
— In this paper we analyze the coverage area for LTE-A cellular network by taking into account the interference of first tier and frequency reuse planning. We considered the numerical calculations and simulation results to measure the received signal strength at the users for downlink and uplink performances. It has been shown from results that there is degradation in the received signal strength at cell boundaries from-34dBm at the center to-91dBm at the boundaries with spectral efficiency from (4.3 to 0.5) bps/Hz at cell edge. We verify the mathematical model by using the ATDI simulator for the LTE radio planning that deals with a real digital cartographic and contains standard formats for propagation loss. Keyword-LTE-A, RSSI, Coverage, UE I. INTRODUCTION With the growing application for of wireless services, and the capacity of 2G networks and 3G is reaching saturation point. Long Term Evolution-Advanced (LTE-A) is a technological advancement proposed by the Third Generation Partnership Project (3GPP) to meet the requirements of Fourth Generation (4G) mobile broadband system with a powerful service carrying capacity and the efficiency of resource use, and lower cost of network construction and operation, and flexible network deployment[1]. The LTE is the latest standard in the mobile network technology tree. It inherits and develops the GSM/EDGE and UMTS/HSPA network technologies and is a step toward the 4th generation (4G) of radio technologies designed to optimize the capacity and speed of 3G mobile communication network. From the view point of LTE network design, these technologies and algorithms recover network performance but enhance system difficulty as well. To work out an efficient, reliable network coverage planning design for LTE, it is required to study the system's technical features expansively using system theories, simulations, and tests [2, 3]. The main aim of coverage planning is to estimate the coverage distance of a BS with parameter settings derived from actual cell boundary coverage requirements sequentially to meet network size requirements. Planning strategies for LTE system coverage can be classified into uplink edge and downlink edge, uplink edge is essentially applied in coverage. The uplink coverage radius is calculated using the received power from users to base station and link budget parameters, then the downlink edge is based on the received power at the users from donor and the interferences power from neighbors cell as shown in Figure 2. It is well known that the coverage of the cell has an inversely proportional with the user capacity of the same cell. An increasing in the number of users in the cell causes the total interference seen at the receiver to increase. This causes an increase in the power required to be received from each user [4, 5]. This is due to the fact that each user has to retention of a certain Signal-to-Interference plus noise Ratio (SINR) at the receiver for satisfactory performance. For a set maximum acceptable transmission power, an increase in the required power reception will result in a decrease in the maximum distance a mobile can be from the BS thereby reducing the coverage. The analysis in this paper proposed to the downlink performance in terms of the SINR at the user equipment (UE), where the UE associates itself with the BS which has the maximum SINR at the UE. The signal strength at the UE is an important metric that decides the outage probability, capacity and spectral efficiency of a cellular network in the downlink. The description of SINR distribution is helps in the complete understanding of the SINR metric. The structure of the paper is organized as follows: Section II describes the proposed mathematical system model of the analysis the LTE coverage performance. The link budget describes that used to approve the mathematical model for received signals strength at the users over cell is explained in Section III. The discussion of results and conclusion are explained in Section IV and Section V respectively.
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