We explore the RIPless theory for the analysis of single snapshot DOA estimation with uniform linear array using the compressed sensing technique. Starting with a sparse signal recovery model constructed for single snapshot DOA estimation, we prove the isotropy property and incoherence property are fulfilled for the estimation problem. A vital proposition is obtained using the RIPless theory, which

The IPv6 routing protocol for low-power and lossy networks (RPL) is the standard routing protocol for IPv6 based low-power wireless personal area networks (6LoWPANs). In RPL protocol, DODAG information object (DIO) messages are used to disseminate routing information to other nodes in the network. A malicious node may eavesdrop DIO messages of its neighbor nodes and later replay the captured DIO many

In this paper, we propose a new Adaptive Cooperation (AC) protocol for Free Space Optical (FSO) communications. Two versions of the protocol are presented. The first protocol uses the Instantaneous Signal to Noise Ratio (ISNR) to activate the relay only when the corresponding instantaneous throughput is better than that of the direct link. The second protocol uses the Average SNR (ASNR) to activate

Device-free passive wireless indoor localization has attracted great interest due to the widespread deployment of Wi-Fi devices and the rapid growth in demand for location-based services. In this paper, we propose a novel device-free passive wireless localization system with a weighted transferable discriminative dimensionality reduction method (termed TLLOC). It utilizes the channel state information

Crowdsourcing application, deemed as a key evolution on the way to vehicular networking, has great potential to provide real-time services. However, existing cloud-based vehicular networking cannot support real-time data transmission with wasting massive bandwidth resources. This paper studies the crowdsourcing application in edge-assistant vehicular networking. To improve the real-time demand of data

Network slicing technology is a core part of 5G network, which enables users to access the suitable network on demand and increases the flexibility of network resources through appropriate network configuration. However, the group users in dynamic 5G network slices face communication security threats (impersonation attack, network monitoring, identity leakage, etc.). Group key agreement (GKA) protocol

In this paper, the impact of varying path loss exponent (PLE) on user association probability, decoupled uplink coverage probability as well as decoupled uplink average spectral efficiency in downlink uplink decoupled (DUDe) multi-tier heterogeneous networks, is investigated. We investigate the effect of the difference in path loss exponents in both macro and small cell environments over uplink network

We present a new fast polling algorithm (FPA) in a wireless mesh network (WMN) for Narrowband Internet of Things systems using multi-hop WMNs. We focus on wireless networks with stationary IoT remote telemetry units (IoT RTU), such as wireless network monitoring. The goal of the new FPA is to minimize the time required for supervisory control and data acquisition center to poll all RTUs one by one

An efficient and fair packet scheduler is very important to guaranty the cellular network quality of service (QoS). In general, classic packet schedulers follow static rules based on priorities. Unfortunately, static rules may cause unfair resource distribution. We present and analyze FuzSy, a cellular network packet scheduler based on the quality of service and fuzzy logic. Instead of following static

The Quantum-Dot Cellular Automata (QCA) is an incipient nanotechnology in contrast to the CMOS technology with appealing features like low power consumption, high speed and reduced size in implementing the architecture for the computations. QCA provides better and well-organised solution with a modern and exclusive result in performing logical computations at Nano-scale. In this paper mainly focused

Cognitive radio (CR) is introduced to efficiently and opportunistically use the limited spectrum to minimize the spectrum scarcity issues. Usually, service providers purchase the spectrum license from the policy-makers and spectrum regulator authority. The non-licensed users cannot utilize the licensed bands even though primary user is not transmitting. It sometimes results in under-utilization of

In cognitive radio networks, secondary nodes should sense the channel using spectrum sensing algorithms to detect primary activity. When primary user (PU) is idle, secondary users opportunistically transmit over this frequency hole. In this paper, we provide the detection probability (DP) of the energy detector (ED) for wireless energy harvesting systems. PU and relays harvest energy from radio frequency

In this article, we suggest a new Spectrum Sensing (SS) algorithm using Incremental Relaying (IR). In previous studies, the relays always cooperate in the SS process. However, sometimes the Signal to Noise Ratio (SNR) of the direct link between the Primary User (PU) and the Fusion Node (FN) is high and cooperation is not required. We suggest to activate the relays only when the SNR of direct link is

In this paper, we have proposed Link Pair Method (LPM) and Improved Double Cycle (IDB) method based on pre-Configured Cycles (p-cycles) for two-link failure protection in optical networks. We have compared Double Cycle (DB), IDB and LPM method on the basis of spare capacity and computation time. We have observed a reduction in the required spare capacity for IDB as compared to the DB method. We achieved

Software-defined networking (SDN) has provided a new paradigm for network management by allowing a central controller to program the underlying switches directly. However, OpenFlow, the de facto standard API for communicating with the switches, has limited visibility into the network headers, hindering innovations in the data plane and overloading the controller when a more sophisticated network application

The security rate optimization problem of a multi-antenna decode-and-forward full-duplex relay system powered by simultaneous wireless information and power transfer is studied. A system model and secure transmission scheme based on energy cooperation and cooperative jamming are presented. The full-duplex relay node works in a power splitting mode for energy collection and information decoding. Artificial

Frequency-domain contention is a new paradigm of contention that has been proposed to enhance the performance of OFDM wireless networks. In this paper, we demonstrate how frequency-domain contention schemes would fail in a wireless local area network (WLAN) due to the existence of nodes that are hidden from each other. In addition, we propose a new MAC protocol, which is called EFDC (enhanced frequency-domain

Telecom systems for ships and offshore plants used to be tools for long-distance communication in the past. Today, telecom systems combined with evolving IT ensure safety, accident prevention and cost saving for ships and offshore plants. In the future, all systems will be managed and controlled by telecom systems. Yet, the IMO and Classification Societies have neither revised nor amended the requirements

In this paper, wireless sensor network (WSN) security issue in the presence of an eavesdropper is analysed. The sensor-sink as well as sensor-eavesdropper channels are assumed to be subjected to generalized-K fading. According to the physical layer security framework, we employ round-robin, optimal sensor and cumulative distribution function-based scheduling scheme to enhance secure connection between

Rain induced attenuation prediction is considered a fundamental step in the analysis of satellite communication links for frequencies above 10 GHz, due to their major effect on the satellite communication link and services. This paper presents an approach for predicting and analysing the satellite link performance during rainfall in subtropical climate for K and Ka frequency bands. The study characterizes

In general, a concatenated RS/BCH code consists of an outer RS code and an inner BCH code with separation by an interleaver. We create a novel BCS code using a new methodology by combining an outer BCH code with an inner RS code appended by an interleaver to randomize burst errors and help the RS code in correcting the errors. Generally, BCH codes handle binary data, whereas RS codes handle non-binary

Abstract In multiapplication sharing wireless sensor networks, various application queries exhibit similarity in their spatial, temporal, and sensing attribute requirements, thus result in redundant sensing tasks. The dissemination and execution of such redundant sensing tasks cause network traffic overhead and quick energy drop of the sensor nodes. Existing task scheduling and allocation mechanisms

Abstract Intelligent transportation system is a prominent technology solution for the vehicle manufacturers in this present scenario. The manufacturers are trying to deploy an advanced system for automation through sensing. Various technologies are being used to communicate with other near-by vehicle and to sense their perspective on the road. The important problem is to share the radar and communication

Abstract Orthogonal frequency division multiplexing based cooperative system using Alamouti space–time block coding at relay node represents an alternative solution to achieve better connectivity and significant enhancement to the data rate in wireless fading channels. But, these advantages cannot be achieved without an efficient estimation of the channels which becomes more challenging for cooperative

Abstract For the underlay spectrum sharing, a primary transmitter (PT) and a secondary transmitter (ST) can transmit simultaneously to a primary receiver (PR) and a secondary receiver (SR), respectively. The transmit power of ST is strictly controlled under the performance constraint of primary system. The strong interference from PT and the weak signal from ST make the communication quality of secondary

Abstract In the Internet of Things architecture, the distributed management structure of the data center-micro data center (MDC)-intelligent terminals is the foundation for intelligent terminals accessing, real-time data interaction and data release. It is necessary to perform security level detection before intelligent terminals accessing to the MDCs, which can facilitate MDCs to understand the ability

Abstract This research article has been conducted for the efficient use of frequency spectrum in multi-RAT cellular network using dynamic spectrum refarming (DSR). For this purpose, two overlapping networks, GERAN and EUTRAN, and their voice and data traffic statistics are taken into consideration. Our investigation of hourly traffic changes in the voice service in the GERAN and the data service in

Abstract The Channel estimation in Vehicle-to-Vehicle (V2V) communications is critical due to the time-varying characteristics of the V2V channel. Hence, the authors propose a hybrid approach towards channel estimation by combining Pilot Symbol Aided Channel Estimation (PSACE), Improved Crow Search Algorithm (ICSA), and Decision Directed Channel Estimation (DDCE) by employing Weight Regularized Convolutional

Abstract The vehicle-to-everything (V2X) communications, as enabled by cellular device-to-device (D2D) links, has recently gained greater attention owing to the remarkable capacity it displays in enhancing traffic safety, effectiveness, and comfort. It is in this context that the present paper can be set, whereby a new technology is advanced, relating to the fifth generation (5G) associated D2D based

Abstract In the era of Internet-of-things (IoT), the future 5G networks are supposed to provide ubiquitous connectivity, high speed, as well as low latency and energy efficiency at low cost to billions of battery-powered wireless devices. The anticipated tremendous demand for wireless bandwidth in 5G networks calls for efficient usage of the underutilized licensed frequency spectrum that preserves

Abstract Although 4G (fourth generation) i.e. LTE (long term evolution) systems are now in use world-wide. But today’s 4G systems have some challenges left such as spectrum scarcity and energy efficiency. The prime objectives of near-by-future 5G (fifth generation) wireless communications are reliability, higher data rate, higher bandwidth, high spectrum efficiency, higher energy efficient and that

Abstract The content-centric networking depends on a forwarding information base (FIB) to forward Interest towards providers and utilizes reverse paths in a pending Interest table (PIT) to send Data back to consumers. If consumers change their locations, reverse paths may disrupt and consequently content-centric communications fail. If providers change their locations, each relevant content router

Abstract Signals from indoor access points in a wireless fidelity suffer from high attenuation as a result of the thick walls and metal structures in the multilevel-storey buildings where they are deployed. This is due to the scattering of the retransmitted signals by the thick walls and metal structures. Power line communication (PLC) technology is considered as a solution to overcoming this challenge

Abstract Future wireless networks like 5G will carry an increasingly wide variety of data traffic, with different QoS requirements. In addition to conventional data traffic generated from HTTP, FTP and video streaming applications by mobile broadband users [human-type communication (HTC)], traffic from machine-to-machine (M2M) and Internet-of-Things (IoT) applications [machine-type communication (MTC)]

Abstract Wireless sensor networks are designed in such a way that transfer sensed data to base station, while a part of network is faulty. This study suggests a fault-tolerant clustering-based multipath algorithm for wireless sensor networks. We have employed a hybrid energy-efficient distributed clustering approach, to cluster nodes. Then a backup node is selected to increase the fault tolerance of

Abstract Certificateless authenticated key agreement (CLAKA) is important to prevent the escrow problem. It also mitigates the certificate management burden in storage and during the message exchange. However, many previously designed CLAKA protocols were designed in the centralized system architectures that may cause the single point of failure. A new CLAKA is designed in a decentralized (blockchain)

Abstract Security of information in computers is of paramount importance. Considering the software security as inadequate, hardware rooted security standards were developed as Trusted Platform Module (TPM) 1.0 in 2003 and subsequently as TPM 2.0 in 2012. While trustworthy, these standards and their corresponding implementation in hardware as TPM chips were found to be inappropriate for mobile computing

Abstract Energy efficiency has become a primary issue in wireless sensor networks (WSN). The sensor networks are powered by battery and thus they turn out to be dead after a particular interval. Hence, enhancing the data dissipation in energy efficient manner remains to be more challenging for increasing the life span of sensor devices. It has been already proved that the clustering method could improve

Abstract The increasing number of companies that are migrating their IT infrastructure to cloud environments has been motivated many studies on distributed backup strategies to improve the availability of these companies’ systems. In this scenario, it is essential to study mechanisms to evaluate the network conditions to minimize the transmission time to improve the availability of the system. The

Abstract Compressive Sensing (CS) has proved to be a promising approach for the Internet of things (IoT) due to the fact that CS can abate the magnitude of raw data which is to be transmitted to the sink. It further helps in acquiring the traffic load balancing in the whole network. Recently, a plethora of research is reported that combines the clustering with CS in three genres; a plain CS, hybrid

Abstract Within realization of the visions of the Internet-of-Things (IoT), Low Power Wide Area Networks (LPWANs) are undoubtedly one of the fields that attract high interest from both academic and industrial fields. To ensure reliable data exchange between low power and low data rate devices across long distances, which are the main aims of LPWAs, it is necessary to utilize advanced wireless communication

Network monitoring is essential to tasks ranging from planning to troubleshooting. Unfortunately, comprehensive real-time monitoring of complex networks with large traffic volume is challenging. In particular, tracking of time-dependent metrics, such as round-trip latency or transmission rate requires maintaining state and this is hard to scale. We propose BloomTime: a network monitoring primitive

Over the past couple of decades, the research area of network community detection has seen substantial growth in popularity, leading to a wide range of researches in the literature. Nature-inspired optimization algorithms (NIAs) have given a significant contribution to solving the community detection problem by transcending the limitations of other techniques. However, due to the importance of the

Millimeter wave (mm-wave) communication is one of the key enabling technologies for meeting the requirements of the fifth generation (5G) wireless communication systems. It is, therefore, essential to have accurate information about the mm-wave radio channel characteristics for successful deployment of these systems. There are many recent mm-wave channel characterization measurements reported worldwide

Cognitive radio (CR) is a promising technology for the upcoming 5G communication which addresses opportunistic channel usage for enhanced spectrum utilization. However, Quality of Service (QoS) provisioning is a major challenge for CR Network due to the service interruption and packet error caused by random primary activities. In addition to this, periodic spectrum sensing for primary user protection

This paper proposes a scheme to reduce a size of a packet header for a segment routing (SR) scheme in a software-defined network (SDN). The SR scheme inserts a segment identification (SID) list into the packet header to indicate a path for the source–destination pair of the packet. The path can be split into different segments to suit the service requirement and the segments are carried by the SID-list

The Internet Engineering Task Force recommends the use of a group of well-defined protocols to support Internet of ThingsLow-Power Low-Rate Networks (LLNs). These mechanisms range from physical and media access layer technologies like IEEE 802.15.4 and Bluetooth Low Energy to session and application layer protocols like the Constrained Application Protocol (CoAP). Specifically, CoAP provides, by means

The device-to-device (D2D) enabled cloud radio access network (C-RAN) is considered as a promising network model which provides high data rate and energy efficiency. In this paper, we formulate a joint mode selection, subchannel assignment (SA), power allocation (PA) and remote radio head (RRH)-association problem in D2D enabled single carrier frequency division multiple access based C-RAN in the uplink

This paper applies time modulation to deal with the design of antenna arrays for UAVs formation flight using a rectangular micro-strip as antenna element in the frequency of 2.4 GHz. The motivation for this paper is to exploit the properties and advantages of time-modulated arrays in an interesting application: UAVs formation flight. This design considers the optimization of the position of the drones

TO-DCF, a new backoff scheme for 802.11, has the potential to significantly increase throughput in dense wireless LANs while also opportunistically favouring nodes with heavier traffic loads and/or better channel conditions. In this paper we present an analytical model to investigate the behaviour and performance of the TO-DCF protocol with regards to operating parameters such as the number of nodes

Recent research has focused on Continuous K-Nearest Neighbor (CKNN) query over moving objects in road networks. A CKNN query is to find among all moving objects the K-Nearest Neighbors (KNNs) of a moving query point within a given time interval. As the data objects move frequently and arbitrarily in road networks, the frequent updates of object locations make it complicated to process CKNN accurately