Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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    From Light to Li-Fi: Research Challenges in Modulation, MIMO, Deployment Strategies and Handover
    (Institute of Electrical and Electronics Engineers Inc., 2019) Salvi, S.; Geetha, V.
    With an increasing number of network-connected devices, there is a need for new and innovative ways of providing communication. Due to the over-usage of existing Radio Frequency(RF) spectrum, it is essential to explore other alternatives. A possible solution for reducing the load over RF spectrum for communication could be the usage of alternative 380 to 740 nanometers wavelength, i.e., Visible Light spectrum. It satisfies multiple objectives, such as provisioning of illumination and communication. Characteristics of channel and propagation medium have been studied to provide the required preliminary understanding of the problem domain. The primary research focuses on Li-Fi communication is in the area of modulation techniques and handover management. Various existing modulation techniques have been studied and compared with respect its performance parameters such as attainable bandwidth, spectral efficiency, noise ratio, and illumination. Different MIMO techniques, design requirement, deployment patterns, and Handover techniques have also been highlighted. This work provides open research challenges related to modulation techniques, MIMO, Handover, and Deployment Strategies for Li-Fi. © 2019 IEEE.
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    Deployment of a Simple and Cost-Effective Mobile IPv6 Testbed for the Study of Handover Execution
    (Springer Science and Business Media Deutschland GmbH info@springer-sbm.com, 2021) Chandavarkar, B.R.
    In the performance evaluation of any networking system, the testbed approach is more difficult, expensive and time consuming compared to the analytical and simulation approaches; however, the former has the advantage of realistic results. The purpose of this paper is to present, in detail, the deployment of a simple and cost-effective Linux-based Mobile IPv6 Testbed for the study of handover execution with testing checkpoints and debugging procedures. Further, this paper evaluates performance metrics such as bandwidth, packet delay, jitter and handover delay with respect to TCP and UDP traffic, and compares the same with the MIPv6 NS2 simulation results. Numerical results show that there is a marked variance between testbed and simulation results. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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    Design and implementation of SDN-based handover in 5G mmWave
    (Institute of Electrical and Electronics Engineers Inc., 2021) Dhruvik, N.; Karia, A.J.; Khatri, A.; Manjappa, M.
    5G networks are more reliable than the widely used 4G network. They have extremely low latency and greater capacity. Apart from these benefits, 5G networks have speeds ranging from 1 gigabit - 10 gigabits per second. For accommodating such high rates, the User Equipment(UE) has to continuously keep switching between base stations once the signal from the previous is below some threshold. This is known as handover. Further, in a 5G scenario, where the base station coverage area is much smaller compared to 4G, UE frequently encounters handover because of its mobility. Hence, an efficient handover algorithm is required, and Software-Defined Networking (SDN) is the best option to design such algorithms. SDN, a fore-front technology, uses software-defined controllers which enable the centralised supervision of the entire network. The proposed research work has defined a software controller based handover for the 5G mmWave, which ensures Quality of Service(QoS) to the UEs. For the communication, a new interface called HOinterface has also been defined. The proposed architecture reduces the handover delay and is flexible, scalable, and efficient. The proposed SDN architecture is implemented in the NS3-mmWave patch and it was evaluated for its strengths and weaknesses. The results obtained are encouraging. © 2021 IEEE.