Conference Papers

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

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    Outage Probability Analysis of Variable and Fixed Gain Relay-Assisted Dual-Hop RF-FSO Links Using Space–time Block Code Users
    (Springer Science and Business Media Deutschland GmbH, 2023) Naik, R.P.; Bhargava Kumar, L.B.; Krishnan, K.; Chung, W.-Y.
    In this paper, we have implemented an analytical study on a relay-assisted dual-hop system using fixed and variable gains for the radio-frequency (RF) and free-space optical communication (FSO). RF and FSO links are realized using the Rayleigh and Malaga distribution functions. Simulation results shows that pointing errors become severe, system performance deteriorates, and conjointly that the RF users exploiting space–time block coding (STBC) will enhance the performance of the end-to-end system. Outage probability of the end-to-end communication link operated with the STBC using the variable and fixed gain system implemented and plotted with respect to average SNR. From the obtained results, fixed gain relay-based communication link performs better efficient than the variable gain relay system. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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    Collision Resolution of VANET Nodes for TDMA MAC Protocol
    (Institute of Electrical and Electronics Engineers Inc., 2023) Gubbi, A.V.; Ravi, A.; Reddy, P.H.; Chandavarkar, B.R.
    TDMA is a channelisation MAC protocol that is advantageous in Vehicular Ad hoc Networks(VANETs) to schedule and control the access to shared communication channels, so that multiple vehicles or nodes can transmit and receive data without interfering with each other. However, when multiple nodes transmit data at the same time slot, a collision can occur, and may result in loss of data or data corruption. This paper aims to investigate and propose an improved collision resolution mechanism that improves the network's throughput and reduces packet loss. The goal is to ensure efficient and reliable communication among nodes in VANETs, which find various applications in emerging technologies. © 2023 IEEE.