Faculty Publications

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    Integration of E-health and Internet of Things
    (Elsevier, 2023) Hajarathaiah, K.; Änamalamudi, S.; Enduri, M.K.; Sangi, A.R.; Lavanya, H.M.
    The proliferation of healthcare-specific Internet of Things (IoT) devices opens up huge opportunities in automated healthcare management systems. Integrating the healthcare system with IoT networks is crucial due to time-critical sensitive applications. State-of-the-art IoT networks transmit the application data through nondeterministic best effort traffic flows, whereas the data from different nodes used to be scheduled in a single shared channel. On the contrary, data from healthcare systems needs to be transmitted in predetermined per-flow deterministic traffic flows to guarantee the quality of service (QoS) in terms of transmission delay and packet drops. To achieve this, the current IoT protocol stack needs to be updated with the support of deterministic traffic flows to ensure the guaranteed QoS in healthcare and medical applications. Hence, this chapter proposes the protocol aspects (scheduling and routing protocol) to integrate E-health with IoT networks to ensure predetermined traffic flows with predictable end-to-end delays. © 2023 Elsevier Inc. All rights reserved.
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    Performance analysis of AODV, AODVUU, AOMDV and RAODV over IEEE 802.15.4 in wireless sensor networks
    (2009) Gowrishankar, S.; Sarkar, S.K.; Basavaraju, T.G.
    In this paper the focus is on the performance study of four routing protocols, namely AODV, AODVUU, RAODV and AOMDV. We call these protocols AODV family of protocols as all these protocols consider AODV as the base routing protocol upon which these protocols are improved. Even though AODV and AODVUU are not different protocols, we wanted to see if there is any improvement in using the AODVUU implementation for a sensor network environment. We have investigated whether a multiple path algorithm like AOMDV would result in more data delivery as compared to single path solutions like AODV in a sensor network. Also, the reverse route discovery mechanisms employed in RAODV is checked for a sensor network. There is a need to understand the versatile behavioral aspects of these routing protocols in a wireless sensor network with varying traffic loads and the number of sources. All these protocols are simulated using NS- 2 over IEEE 802.15.4. We also claim that our work is the first of its kind to study and compare the performance of all these four routing protocols from a sensor network point of view by extensively using various performance metrics like packet delivery ratio, average network delay, network throughput and normalized routing load. © 2009 IEEE.
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    Implementation of wsn protocol on a heterogeneous hardware
    (2013) Bhat, R.B.; Alfandi, O.
    Wireless sensor network has become the ubiquitous communication system due to its low power consumption, durability, ease of deployment, and simplicity of the protocol stack. It is most suitable for applications involving limited, infrequent data transfers. But to make it suitable for applications involving high data rate and bulk amount of data transfers like video surveillance or monitoring, certain modifications are necessary. As the WSN stack is based on IEEE 802.15.4 standard regulations, when it is implemented on a IEEE 802.15.4 compliant hardware it may not be possible to serve the above purpose. Thus in this proposal, to achieve high data rate, the WSN stack is imported on to the IEEE 802.11 enabled hardware by making suitable modifications into the protocol stack. Even though the IEEE 802.11 based hardware consumes higher power, the WSN stack is suitably tailored to mitigate the excess power requirement for the data transfer by using some power conservative techniques. To make the system more power conservative new node deployment scheme, range selection method, power conservative microcontroller sleep states, block acknowledgement methods are also introduced. The features like higher bandwidth and buffer capability of the transceiver are explored in this proposal to achieve the objectives efficiently. Thus by making the stack simple and power efficient based on IEEE 802.15.4 standard and importing on to IEEE 802.11 compliant hardware the application requirements are suitably handled. © School of Engineering, Taylor's University.