Kileo, Aude Nishael2021-08-182021-08-182020Kileo, A. N (2020) Modelling of access network to the national broadband backbone using optical wireless technology, Masters dissertation, University of Dar es Salaam, Dar es Salaam.http://41.86.178.5:8080/xmlui/handle/123456789/15425Available in print form, East Africana Collection, Dr.Wilbert Chagula Library, class mark (THS EAF TK5103.T34K554)Growing demand for high bandwidth is unavoidable as the number of users increases dramatically every day. The current access networks are unable to serve many users at the same time due to bandwidth limitations. Despite the effect of government to construct the National Backbone Broadband to close the digital gap and promote sustainable socio-economic development, National Information and Communication Technology Broadband Backbone is underutilized due to access network bandwidth limitations problems. The rapid development of the mobile Internet and the predominance of smart devices, such as smartphones, tablet computers, and wearable communication devices have come with high demand on the bandwidth of the transmission medium; there is an exponentially increasing demand for data transmission in networks in recent years. In this study, Optical Wireless Technology is introduced where the atmospheric attenuation as the main wireless impairment is calculated. The mathematical channel modeling effort discussed in this study is the first real attempt towards the availability and reliability prediction of terrestrial Optical Wireless links through simulation in Dar es Salaam. User’s requirements were established by comparing the existing access network performance metrics and the practical achievable metrics performance required by network end-user. The atmospheric attenuation for different weather conditions calculated and the results was used to measure the performance of different network metrics. Simulation results showed optical wireless technology bandwidth restrictions is not an issue as the system can provide up to 94.3% throughput, the signal delay of 0.81915 µs and cost of installations is 0.25% of the existing access technologies. Most of the access technologies are limited to bandwidth while optical technology is bandwidth unlimited. Optical Wireless Technology has some challenges that are weather-based conditions, in this study simulation done to know the challenges that are faced due to the weather conditions of Dar-es-Salaam as a study area.enTelecommunication lineswireless communication systemmobile communication systemwireless technologyTanzaniaThesis