• Design and Simulation of An Elevator DC Motor Drive with Cascaded Position, Speed and Current Control 

  Samuel, Tamana (Addis Ababa University, 2018-10)

  An elevator drive control system design is very important in the elevator performance profiles for the safety and comfort of passengers. These profiles include the slowly accelerating to maximum recommended speed, ...
• Application of Smart Antennas to Cognitive Radio Systems 

  Murad, Ridwan (Addis Ababa University, 2013-02)

  This dissertation studies three interrelated topics: design of non-uniform antenna arrays using genetic algorithm (GA), application of smart antennas to cognitive radio (CR) and determination of the distributions of ...
• Energy Assessment and Optimization In Second Generation Wireless Access Network, The Case of Ethio-Telecom 

  Belete, Teshale (Addis Ababa University, 2018-12)

  For the last five years, the main concern of Ethio-telecom was the enhancement of existing wired and wireless network performance, so that new services being offered could work properly and be available to a larger number ...
• Performance Analysis of Precoding Techniques for 5G Massive MIMO and Wireless Systems 

  Aga, Bayou (Addis Ababa University, 2018-10)

  Due to that wireless technology improvement is ongoing, the numbers of users and applications increase rapidly. Then wireless communications need the high data rate and link reliability at the same time. Future generation ...
• Cross Boarder Interference on UMTS Mobile Network and Its Impact on Revenue: the Case of Border Town Togowchale 

  Hagere, Demessie (Addis Ababa University, 2018-11)

  Universal Mobile Telecommunications System (UMTS) which has been standardized by the 3rd Generation partnership project (3GPP) organization, utilizes Wideband Code Division Multiple Access (WCDMA) as radio access ...
• Empirical Outdoor-to-Indoor Propagation Path Loss Models Investigation and Tuning for 900, 1800 & 2100 MHz Frequencies: the Case of Addis Ababa City 

  Zerihun, Teshome (AAU, 2018-11)

  As trend of cellular traffic shifts from voice dominant to data and most of this traffic is being generated from indoor environment, providing optimal indoor solutions is becoming prime target of a radio planning task. ...
• Application-Aware Data Center Network Bandwidth Utilization: the case of ethio telecom 

  Zerihun, Mamo (AAU, 2018-11)

  The existing ethio telecom data center network (DCN) is the traditional model which provides only the Best Effort (BE) traffic delivery service on a layer three links with the same priorities for all applications traffic. ...
• Optimal placement of Controllers for the Adoption of Software Defined Networking: In the case of ethiotelecom 

  Zemene, Markos (AAU, 2018-11-14)

  The tremendous increase of data traffic has been a key reason for the upgrading of traditional networks. One of the new models that has been developed for redesigning and managing communication networks is software-defined ...
• Spatiotemporal Mobile Data Traffic Modeling: The Case of UMTS Network in Addis Ababa, Ethiopia 

  Yosef, Abera (AAU, 2018-11)

  The exponential growth in mobile data traffic is forcing telecom operators to invest on new infrastructures. But devising techniques for optimum network utilization, which can be provided by traffic modeling, has the ...
• Sleep Mode Operation of Optical Networks for Power Consumption Minimization: a Case Study of Ethio Telecom Backbone Optical Transport Network 

  Yohannes, Belayneh (AAU, 2018-11)

  Due to the growth in data traffic volume and diversification of applications that use telecommunication network infrastructure more power consuming telecommunication network equipments have been deployed. This scenario, ...
• Performance Evaluation of Server Cluster Load balancing Algorithms Using SDN Open Flow Model 

  Wubshet, Abebe (AAU, 2018-10)

  Due to the growth in the network usage, there is huge traffic pressure to server clusters in the datacenters. To manage incoming traffic, operators choose a load balancing technology to assign the incoming traffic to ...
• Constraint-Based Hybrid Resiliency Mechanisms for Better Resource Utilization and Service Performance Quality in ASON SLA 

  Wondale, Kebede (AAU, 2018-11)

  In optical transport networks, contents of service level agreement (SLA) are not standardized yet. There is a general recommendation to include network resiliency mechanisms in SLA contracts by considering trade-off ...
• Telecom Engineering (Information Systems (TIS) Stream) 

  Werku, Melesse (AAU, 2018-11)

  In the rapid development of information technology, many enterprises are challenged by seamless information exchange and resource sharing requirement in a heterogeneous enterprise environment. However, service-oriented ...
• Performance Evaluation of 6-Sector Site and Small Cell for Addis Ababa UMTS Deployment Scenario 

  Tirufire, Aberra (AAU, 2018-11)

  The demand for high data rate has been increasing due to various innovative data services that improve human life. To accommodate the increasing demand with satisfactory Quality of Service (QoS), operators must continuously ...
• An Integration Pattern Selection Framework for ethio telecom Enterprise Systems 

  Thomas, Abebe (AAU, 2018-11)

  Enterprise Application Integration (EAI) as a solution combines processes, standards, software and hardware for the seamless integration of different enterprise systems in order to operate and function as one. The success ...
• Network Traffic Classification Using Machine Learning: A Step Towards Over-the-Top Bypass Fraud Detection 

  Tewodros, Hailu (2018-11-14)

  Over-the-Top (OTT) bypass is a type of Interconnect Bypass fraud where regular voice calls are rerouted through OTT network and terminated as an OTT call. These calls are terminated using OTT applications which need ...
• Traffic Modeling using Power Consumption of Base Station: The case of Ethio telecom 

  Tesfu, Hagos (AAU, 2018-10)

  Wireless telecommunication networks have become fundamental to daily activities. The mobile telecommunication market in Ethiopia is grown significantly in the past few years. Recently there are about 67.5 million mobile ...
• Short Message Service Fraud Mitigation Taxonomy: The Case of ethio telecom 

  Tarikua, Worku (AAU, 2018-11)

  Telecommunication fraud is remaining challenging since the beginning of commercial telecom service. There are various reasons that makes telecom fraud mitigation inefficient. Some of them are; integration of new technologies ...
• Investigation and Optimization of Electrical Tilt and Azimuth for Addis Ababa LTE Network 

  Taddege, Assefa (AAU, 2018-11)

  Demand for mobile broadband connectivity is significantly increasing and mobile network operators are continuously improving their network by introducing new technologies to accommodate the demand. After mobile network ...
• Cell Outage Detection Through Density-based Local Outlier Data Mining Approach: In case of Ethio telecom UMTS Network 

  Solomon, Bekele (AAU, 2018-11)

  Mobile traffic growth increases exponentially over the years. To gratify the growing traffic, which requires capacity and coverage, densification of a network is a key solution. As mobile network becomes larger and ...

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