We are running in the communication era demanding a very large bandwidth for high speed applications. Among the available bandwidth technologies, the optical fiber seems the most appropriate and best fit. The optical fiber technology laid down at the backbone networks has almost replaced the preexisting coax cables. To extend fiber connectivity to the end user, especially in congested and remote areas is quite a difficult task in the context to cost and installation time.  Therefore, the first and last mile connectivity (FLMC) is still a bottleneck in extending the beauty of optical fiber to the edge of the network. In most of the applications, the connectivity from backbone to the end user is carried out with the radio or copper links having a much lesser capacity than optical fiber. Keeping in view the nature and size of emerging applications, the FLMC needs to be addressed with the appropriate technology. To address this issue, the emerging solution is optical wireless communication like free space optics (FSO). The FSO is coming as a more promising alternative due to its properties like huge bandwidth and less cost. In this paper, we discuss the possible solution to first and last mile connectivity by FSO links and hence the gap between the optical core and the edge of network can be bridged by FSO communication in reliable and cost effective manner. The significance of the proposed work gives an everlasting impression of using FSO communication in FLMC over the existing ones. The ever increasing demand of high bandwidth can be meticulously met with the FSO communication. The simulation results show that the desirable performance is achieved and is analyzed with performance indicators like Q-factor and BER.

The opportunistic network paradigm has no stable path and synchronous end-to-end communication. In such an environment, the bundle originator or the infected node stores a redundant copy in its buffer. This copy is replicated to other encountered susceptible nodes based on routing decision. The performance of the employed routing is based on delivering the bundle through optimal paths. This paper improves the decision criteria of the PRoPHET routing. This enhancement is achieved by employing the bundle probability and the optimal path hops. We have called our proposed improved PRoPHET utilizing Optimal Path Hops (PRoPHET-OPH). The evaluating of its performance is conducted by delivery probability, mean delay and percentage of overhead. Numerical findings exhibit that the PRoPHET-OPH performance is superior compared with the traditional PRoPHET.

In underwater environment, the sensor nodes are deployed for collecting information and sending back to the base station. Establishing astute communication link among these sensor nodes in a multi-link routing environment is a key challenge for all underwater routing protocols. A sagacious communication link can only guarantee the maximum data transfer rate. The link selection mechanism of three underwater routing protocol i.e, Energy-aware Opportunistic Routing (EnOR) protocol, Shrewd Underwater Routing Synergy using Porous Energy Shell (SURS-PES) and Underwater Shrewd Packet Flooding Mechanism (USPF) have been investigated. After analyzing performance results of these protocols interms of packet delivery ratio, end-to-end ‎delay, network lifespan and energy consumption using NS2 with AquaSim 2.0 simulator. The protocol existing, with sagacious link selection mechanism in multi-link routing environment has been identified. The identification of this sagacious link selection mechanism is a novel approach which can give specific knowledge for targeted output without wasting resources for irrelevant objectives.

Owing to the much-gained popularity and unique properties of origami antenna, a review of some of the important types of these antennas is conducted. Origami is an ancient paper folding technique which has many applications in technical and non-technical fields. With the growing trend of utilizing origami concept, it was integrated with the electromagnetic field to realize reconfigurable antennas. This review contains some of the important applications in which the origami antennas are widely used to make the system more efficient. The development of the antennas over the years and some state-of-the-art designs are discussed along with the future trends in design and manufacturing of origami antennas. Some unique abilities of origami antennas which make them better choice than other antennas are smaller size and volume in addition to being light weight, cost efficient and easily manufacturing. They are widely used to reduce the size of bulky antennas which is very handy in many space and air borne facilities and provide reconfigurable frequency. They are even used to provide mobile range in far off regions which are not accessible with the use of ordinary antennas. The field of antenna design is vast and provides a lot of room for further advancements which are covered in future trends of the paper. This paper provides a detailed review of the different designs of antenna and points towards possible future enhancements and state of the art designs for the fabrication of antenna.

For many applications like brand monitoring, it’s important to search a video from large database using image as query[1]. Numerous visual search technologies have emerged with the passage of time such as image to video retrieval(I2V), video to video retrieval(V2V), color base video retrieval and image to image retrieval. Video searching in large libraries has become a new area of research. Because of advance in technology, there is a need of introducing the well established searching techniques for image base video retrieval task. The main purpose of this study is to find out the best image based video retieving technquie. This research shows the importance of image base video retrieving in the searching field and addresses the problem of selecting the most accurate I2V retrieval technique. A comparison of different searching techniques is presented with respect to some characteristics to analyze and furnish a decision regarding the best among them. The accuracy and retrieval time of different techniques is different. This research shows that there are a number of visual search techniques, all those techniques perform same function in different way with different accuracy and speed. This study shows that CNN is best as compare to others techniques. In future, the best among these techniques can be implemented to reduce the searching time and produce the promising result.