In present paper was aimed to study performance of link adaptation in NBIOT, which introduced by 3GPP in release 13 to function in mobile communications. The fundamental features of NB-IoT are its enlarged coverage, data rate, latency and battery lifetime compared to other cellular technologies. These features of NB-IoT manages it very beneficial in the IoT manufacturing, letting the technology to be hired in a vast domain of implementations, like health, smart cities, agriculture, WSNs. The main target of this study is to determine the performance of distinct characteristics of NB-IoT network with reasonable error rates in the uplink and the downlink connections. The performance of the several ways examined to decide their efficiency in relation to the requirements of the IoT industry. Software simulations were used to compare the distinct criteria settings to inspect which choices give better efficiency and cost trade-offs for constructing an NB-IoT network. The results show that data transmitted in smaller Transport Block Size (TBS) has fewer errors than if it has transmitted in greater blocks. Furthermore, the results offer that the error rate gets higher as the Doppler frequency increases in the propagation channel model. The results also show that the error rate gets higher as the modulation and coding scheme field (IMCS) increase.

This paper proposes a three-computing-layer architecture consisting of Edge, Fog, and Cloud for remote health vital signs monitoring. The novelty of this architecture is in using the Narrow-Band IoT (NB-IoT) for communicating with a large number of devices and covering large areas with minimum power consumption. Additionally, the architecture reduces the communication delay as the edge layer serves the health terminal devices with initial decisions and prioritizes data transmission for minimizing congestion on base stations. The paper also investigates different authentication protocols for improving security while maintaining low computation and transmission time. For data analysis, different machine learning algorithms, such as decision tree, support vector machines, and logistic regression, are used on the three layers. The proposed architecture is evaluated using CloudSim, iFogSim, and ns3-NB-IoT on real data consisting of medical vital signs. The results show that the proposed architecture reduces the NB-IoT delay by 59.9%, the execution time by an average of 38.5%, and authentication time by 35.1% for a large number of devices. This paper concludes that the NB-IoT combined with edge, fog, and cloud computing can support efficient remote health monitoring for large devices and large areas.

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Abstract:Energy efficient is the most important design goal for wireless sensor network. Many types of existing routing protocols are designed to increase the lifetime for the network. In these protocols, cluster-based routing protocols are found to be more energy efficient. A cluster head is chosen to aggregate the data received from nodes and forwards these data to the base station in clusterbased routing. The most important part in the network is the selection of cluster heads which should be efficient to save energy and prolong the lifetime for the network. In our proposed protocol, to make the selection of cluster head optimal and more efficient we use the idea of static clustering. For an optimal number of cluster head selection, we divide a large field sensor into three logical regions on the basis of their location in the sensing field. We install Base Station (BS) out of the sensing area and a gateway node at the center of the sensing area. If the distance of a sensor node from BS or the gateway is less than the threshold distance, the node uses direct communication. The proposed protocol combines the idea of clustering and multi-hop communication. The cluster heads who are far away from BS communicate with BS through the transit cluster heads. While, in fact, these who are near BS can communicate with it directly. We compare performance of our protocol with LEACH (Low Energy Adaptive Clustering Hierarchy). In terms of energy consumption, network lifetime our proposed protocol performed better than LEACH protocol.

Recently, the radio frequency spectrum is turning into congested, standby process to the wireless communication is needed to be suitable for the exponentially growing wireless passage desire. Visible Light Communication (VLC) arrangements supply a standby to the present criterions of wireless transfer of information. The security and high data rate are the main advantages of this technology compared to wireless technology. The major goal of this paper is to design and implement Light Fight (Li-Fi) that can be worked by using light emitting diode (LED) at the transmitter and photo transmitter at the receiver. If the light is found, we can use it as the transmission channel. Li Fi can supply wireless indoor communication. In this work, we sent data by using Li Fi technique for serval meters. Keyword-Li F, LED, Visible Light. I. INTRODUCTION In general, utilizing Wi-Fi technology for browsing via the internet has been established on a group of difficulties for examples: the transmit of data almost is slow, low impedance to interface, passive influence on human healthy, construction of this type of technology needs high cost and complex, minimum standard of security and privacy for subscribers. The most significant daily action is transmitting the data from one place to another; the present wireless network that fasten us to the internet is almost slow when numerous appliances are linked. As the figure of instruments that outlet the internet rises, the constant bandwidth obtainable makes it progressively hard to revel raising data transfer rates and link to a secure network. The problem is that the radio waves have small part of the spectrum obtainable for data carrying. We can solve this problem by using Li-Fi technique. It is a transmission of data via illumination through an LED bulb that alters in thickness speeder than the human eye. The Li-Fi technique is faster and inexpensive than Wi-Fi technology. II. LITERATURE REVIEW The major remarkable evolution in the Li-Fi domain is done in [1], the main goal of this work was to increase the VLC data rate. Two teams from the university of Edinburgh and Oxford are concentrating on analogous data transmission employing arranges of LEDs, where each LED sends a distinct data stream. In [2], author used mix of green, red and blue LEDs to modify the light frequency encoding distinct data channel. The data rate in this case was reached to 500 Mbyte/second. In [3], author was suggested that According to the Li-Fi organization, it is possible to obtain more than 10 Gb/s of data speed, theoretically which would permit a high-definition film to be downloaded in just 30 seconds. In [4], author was discussed the features of Li-Fi technique, its suitable for short data transmission by using LED illumination, and travelling at much speed up to 224 Gb/s. In [5], author has generated a light bulb that tasks with Li-Fi technology on a tiny measure, he was the primer one who carry out a "real-world test.", he demonstrated that the data transfer speeds of almost 1 Gb/s or just almost 100 ...