Browsing by Author "Walizada, Nasratullah"

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Handover and intercell Interference in LTE advanced and beyond
(Department of Technical and Vocational Education (TVE), Islamic University of Technology (IUT), 2013-11-15) Jalil, Lukong Abdu; Walizada, Nasratullah
This work provides an overview of handover and inter-cell interference in LTE/LTE-A. It gives handover techniques in LTE, some of the algorithm with it associated problems and proposed solutions in handover but focuses mostly on Inter-cell interference coordination mitigation (ICIC) techniques. It has been recognized however that inter-cell interference has become the limiting factor when trying to achieve not only high average user satisfaction, but a high degree of satisfaction for as many users as possible. Therefore, inter-cell interference coordination (ICIC) lies in the focus of researchers defining next generation mobile communication standards, such as LTE-A. This thesis provides inter-cell interference mitigation techniques both in homogenous as well as heterogynous networks. It discusses the varied techniques used to mitigate ICI both in Rel 8/9 and Rel 10 of LTE_A, paying attention to the advantages and the disadvantages of each technique. Also various handover algorithms are examined. Lastly, as Performance of spatial multiplexing MIMO techniques degrades with the introduction of interference in the system. To choose optimum MIMO mode it is worthwhile to analyze the UE (user equipment) throughput under different interference scenarios before physical implementation of a system. A comparative study of MIMO technique performances in terms of UE throughput under two different UE speeds and interference scenarios has been examined.
Wireless Sensor Network: applications and Analysis of Routing Protocols
(Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur-1704, Bangladesh, 2012-11-15) Jalil, Lukong Abdu; Walizada, Nasratullah; Hassani, Said
Wireless sensor networks consist of small nodes with sensing, computation, and wireless communications capabilities. Recent advances in wireless sensor networks have led to many new protocols specifically designed for sensor networks where energy awareness is an essential consideration. Most of our attention, however, has been given to the routing protocols since they might differ depending on the application and network architecture. A wireless sensor network (WSN) has important applications such as remote environmental monitoring and target tracking. This has been enabled by the availability, particularly in recent years, of sensors that are smaller, cheaper, and intelligent. These sensors are equipped with wireless interfaces with which they can communicate with one another to form a network. The design of a WSN depends significantly on the application, and it must consider factors such as the environment, the application’s design objectives, cost, hardware, and system constraints. This project surveys recent routing protocols for sensor networks and presents detailed account of various routing protocols. The project also talks about the basic network topologies in wireless sensor network. The basic network topologies include fully connected, mesh, star, ring, tree, bus etc. Again we have presented various system architectures, design issues and challenges in wireless sensor network. Solution to some of these challenges and the applications of wireless sensor networks are also provided. Lastly we conclude with open research issues in WSN