School of Engineering (SEng.)
Permanent URI for this community
Browse
Browsing School of Engineering (SEng.) by Subject "4G Cellular Network"
Results Per Page
Sort Options
-
ItemDevice to Device Communication on Software Defined Radio for 4G Cellular Network(Makerere University, 2022-05) Nambalirwa, Joan4G and 5G networks aim to provide new types of services such as vehicle to vehicle and machine to machine communication, industrial automation, gaming and so on. These services require high quality of services such as high capacity, ultra-reliability and low latencies. D2D communication presents a potential solution by assuring connectivity of a larger number of devices and lower latencies. This work investigated D2D communication on software defined radios for 4G cellular networks. The SDR platform used was blade SDR. The Core Network that is Home Subscriber Server (HSS), Mobility Management Entity (MME) and Serving-Packet Data Network (PDN) Gateway (SPGW) and OAI eNodeB are installed on the same laptop. A bladeRFx40 SDR with two antennas one for transmission and reception is attached to the laptop to complete the eNodeB. tests were conducted using a software-defined radio (SDR) platform. An SDR based system was selected to enable a low cost and highly flexible iterative approach to development while still providing the accuracy of real-world measurement. D2D functionality was added to the chosen SDR system with the essential parts of Long Term Evolution Release 8 implemented. iv
-
ItemDevice to device communication using software defined radios on a 4G Cellular Network(Makerere University, 2023-10-25) Karioki, HafitharThe fourth generation mobile systems are being deployed all over the world to provide broadband mobile services at any place, anywhere and anytime. But, the number of mobile subscribers is still increasing and the need for higher end broadband internet services is also growing [1]. As a result, an increase in the number of subscribers implements profound changes in the way people, businesses and society interact for example social networking, public safety services and advertising. Therefore the proportion of mobile traffic transmitted over broadband wireless networks is expected to grow significantly now and in the very near future [2]. This has called for reconsideration of the state-of-the art fourth generation (4G) technologies to be able to face serious overloads and also much the anticipated acceleration in traffic demand fueled by the rapid proliferation in types and numbers of wireless devices. Several techniques to address the growing traffic loads have been undertaken such as reducing cell sizes and increasing their density alongside heterogeneous networks [3]. The deployment of smaller cells as part of heterogeneous networks is a common solution to enhance the capacity in highly populated areas as they manage higher-quality links and also allow increased spatial reuse. However, extreme densification might also increase the network deployment costs and implies more complex interference management.