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Frequency Assignment Problem Optimization of GSM Network in the case of Addis Ababa

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dc.contributor.advisor Negash, Yalemzewud
dc.contributor.author Abera, Tadele
dc.date.accessioned 2018-06-26T08:14:39Z
dc.date.available 2018-06-26T08:14:39Z
dc.date.issued 2014-09
dc.identifier.uri http://etd.aau.edu.et/handle/123456789/3606
dc.description.abstract In GSM systems, radio frequencies are repeatedly used in order to efficiently use assigned frequency bands. To expand the network capacity, one solution is to reuse the limited frequency resources. Currently the 4x3 frequency reuse technologies for GSM network is in common use here in Addis Ababa. For this reuse model “4” indicates the number of Base Transceiver Stations (BTSs) in the reuse clusters, and “3” indicates the number of cells (sectors) under each BTS. As the number of users increases from time to time, the number of cells increases. Thus, the search space which is the possible range where optimum solution is attained increases. Furthermore, attaining optimum frequencies under each cell is challenging task. This thesis presents group frequency assignment method for the frequency assignment problem in Addis Ababa using genetic algorithm technique. Without violating the 4x3 frequency reuse used currently, the optimization was performed in Addis Ababa with 933 DCS (Digital Communication) 1800 MHz bandwidth cells (sectors). With proper optimization five frequencies can be used under each cell with a group of 24 cells and 125 generations or iterations using the algorithm. This assignment enhanced us to use two more frequencies under each cell than ethio telecom assignment which uses Mentum planet as optimization tool. And thus, capacity of the system increased. Key words: Frequency Assignment Problem Optimization; Genetic Algorithm en_US
dc.language.iso en en_US
dc.publisher Addis Ababa University en_US
dc.subject Frequency Assignment Problem Optimization en_US
dc.subject Genetic Algorithm en_US
dc.title Frequency Assignment Problem Optimization of GSM Network in the case of Addis Ababa en_US
dc.type Thesis en_US

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