Performance Analysis Of Spectrum Scenarios For Outdoor Lte Small Cell Planning The Case Of Addis Ababa Ethiopia

Due to the increasing penetration of smart devices and data intensive applications, mobilernnetwork operators are experiencing exponential data growth. In effect, network capacityrnlimitation that leads to performance degradation is observed. To address this limitation,rndeployment of different types of small cells under umbrella macro network that resultsrnHeterogeneous Networks (HetNets) has been considered as one key capacity enhancementrnapproach. In the introduction of HetNets, operator decision on spectrum allocation schemernsignificantly determines network performance. rnThe Ethiopian sole telecom operator, ethio telecom, has recently started the path to operaternand manage HetNets by deploying small cells within its existing macro network. Nevertheless,rnthere is no thorough performance study on potential spectrum scenarios consideringrnEthiopia’s network environment so that an informed spectrum usage strategy is formulated.rnSpectrum scenarios can be cochannel, where small cells apply same frequency band used byrnmacro cells, dedicated, where they apply different frequency bands or a hybrid of cochannelrnand dedicated. In this thesis, performance analysis is carried out for the spectrum scenariosrnformulated using 1800MHz and 2600MHz bands from network planning perspective whilernconsidering realistic network environment for selected area of Addis Ababa, Ethiopia. MultiobjectivernoptimizationrnbasedrnonrnGeneticrnAlgorithmrnisrnappliedrnforrnnetworkrnplanning.rnrnNetworkrnrnsimulationrnisrnimplementedrnusingrnMatLabrnwhilernpropagationrncomputationrnisrnperformedrnusingrnrnWinProp.rnrnPerformance results show that, allocating dedicated 20MHz band for small cell in 2600MHzrnband provides better aggregate capacity than allocating dedicated same amount of band inrn1800MHz. For instance, dedicated 20MHz in 2600MHz band achieves 0.036Gbps per squarernkm more capacity than in 1800MHz band for around three small cells per sector optimalrndeployment. On the other hand, dedicated 20MHz in 1800MHz achieves 2.3% less user outagernrate than dedicated same amount of band in 2600MHz with around three small cells per sectorrnoptimal deployment. With regards to small cell distribution, planning results show that outdoorrnsmall cell deployment is needed more in locations other than main street.

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