Network Communication System Research Articles

Security model and design of network communication system based on data encryption algorithm

Security model and design of network communication system based on data encryption algorithm

Autonomous Mobile Learning Model of Cloud Education Based on Intelligent Algorithm of Wireless Network Communication

The rapid development of a new generation of information technology and its widespread application in colleges and universities have promoted profound changes in campus informatization. On the one hand, wireless campus networks as the main infrastructure of digital campuses are gradually popularized in domestic colleges and universities, expanding the campus information network coverage. This article is aimed at studying the addition of intelligent algorithms to wireless network communications to optimize and build autonomous mobile learning for cloud education. In order for children to communicate with teachers face to face, no matter where they are, this article proposes how to reduce the energy loss in wireless communication and find the best intelligent algorithm to realize the cloud education mobile learning platform. Experimental results show that the transmission delay of the wireless communication system of this method is significantly shorter than that of the other two methods, close to 5%, which speeds up the data transmission speed of the wireless communication system. It can be implemented under time‐sensitive conditions and has high practical application value. The wireless network communication system of this method has a low packet loss rate and less wireless network data transmission errors, which is nearly 10% lower than the other two methods, thereby improving the data transmission power of the wireless communication network.

Connection-oriented computer network secure communication and encryption algorithm

This paper studies the data encryption model and encryption method of the connection-oriented computer network communication system. Firstly, the application and security analysis of digital certificate and big integer decomposition encryption algorithm in connection-oriented are studied. Secondly, in the design of encryption communication module, a new hybrid encryption mechanism is proposed, that is, a strong and fast encoding algorithm is used to encrypt the plain text, Rivest-Shamir-Adleman (RSA) algorithm is used to encrypt the key, and Secure Hash Algorithm (SHA) algorithm is used to generate the digital abstract. Finally, an improved cryptographic model of elliptic curve cryptosystem is constructed, and an effective exclusive form of node private key is obtained. The experimental results show that the improved algorithm can simplify the deployment and improve the efficiency of the cryptographic system in large-scale public key certificate system.

Transformation of the conditions of socio-economic development of Azerbaijan in the post-pandemic period (by September 2020)

The global economic crisis and the spread of the pandemic virus in a short period have radically changed the world around people. The curtailment of production, the closure of different kinds of services, self-isolation, and the distribution of virtual contacts has become characteristic in the state of almost every country. Depending on the level of socio-economic development, not all countries are equally experiencing this difficult period of crisis in modern civilization. The spread of COVID-19 and the global economic crisis, accompanied by a sharp drop in oil prices, have had a significant impact on the socio-economic condition of the oil exporting countries. Azerbaijan, such a country facing these emerging problems, has taken steps to prevent the spread of the pandemic beyond the metropolitan region. Thanks to a balanced fiscal and monetary policy of the government, as well as the availability of sufficient foreign exchange reserves, the negative impact of the above factors has been minimized. The implementation of the oil strategy of the republic has created favorable conditions for the development of the non-oil sector of the economy. Participation in international transport and logistics projects contributed to the development of inter-district and intra-district transport infrastructures. An extensive network of transport and communication systems has favored the economic development of the regions of the republic. Despite the changing conditions of social economic development of the country, the process of creating infrastructure facilities continued. Of course, the new conditions have adjusted the implementation of state programs for the construction of new economic and socially significant facilities. Large financial deductions from the sovereign Oil Fund of the republic allowed for the shortest possible time to put into operation mobile hospitals, enterprises for the production of medical masks, as well as subsidies to support small and medium enterprises. The new picture more actualizes the development of the non-oil sector of the economy, especially the agricultural sectors. With this in mind, when developing a new strategy for the future development of the republic, one should take into account the lessons of the occurrence of previously unforeseen risks. This will mitigate the blow of new possible cataclysms and get out of the crisis situations with the least social and economic losses.

Secure Software-Defined Networking Communication Systems for Smart Cities: Current Status, Challenges, and Trends

Smart city is a transformative and progressive vision that aims to revolutionize infrastructure systems and public services in an urban area with modern information technologies. Its ultimate goal is to greatly improve the livability Quality of Service (QoS) of its citizens and to optimize the utilization of its assets and natural resources sustainably. One of the key technical attributes in smart cities is to deploy a large number of sensors to collect data to enable real-time and intelligent decisions for various city functions and citizen needs. Many of the data have strict security requirements as they are either private to citizens or sensitive to critical infrastructures. As a result, how to securely and efficiently deliver and process the dramatically increasing volume of data becomes one of the grand challenges in materializing the smart city vision. In recent years, Software-Defined Networking (SDN) has emerged as a leading communication infrastructure candidate for smart cities. While many efforts have existed to research, prototype, and even deploy SDN on a small scale for some smart city applications, there is still a lack of cohesive understanding about SDN’s impact on the secure communication need of smart cities. In this paper, we conduct a comprehensive survey of the core functionality of SDN from the perspective of secure communication infrastructure at different scales. A specific focus is put on the security threats and challenges in accordance with SDN plane-based architectures for various smart city-enabled applications. We further systematically categorize the state-of-art solutions and proposals to apply SDN to support typical smart city applications, such as transportation, health, and energy applications. Lastly, we cast a holistic view of future research trends.

Система вивантаження даних за технологією D2D у неліцензованому діапазоні частот у складі систем зв’язку 5G

With a constant increase in the number of users and the amount of data that they transmit among themselves, modern communication system networks cannot cope with the download. As an alternative to network compression, to increase the capacity of the network, mobile traffic is unloaded in the form of a direct connection D2D (device-to-device) between the equipment of users who are in close proximity to each other. Thus, D2D interaction is one of the most promising areas of development of communication systems, because it is becoming a new component in addition to the mobile network. It is important that this technology ensures the interaction of mobile network users without the use of a centralized infrastructure, which reduces its load. This interaction allows you to upload data streams from the mobile network to the D2D system, which can operate at unlicensed frequencies. As a result, the D2D system provides shorter connections for communications, increased energy efficiency and better traffic flow management. The development of D2D technology is a simple and reliable way to increase the bandwidth of mobile networks without the need to change its structure. But at the same time, several features arise that are related to the consideration of the interference and the distribution of radio channel resources. In this work, we consider a model of a D2D direct connection system with mobile support that serves streams of user data (sessions), as well as a way to control the downloading of traffic from mobile network to a D2D connection. The above theoretical and simulated results allow us to study communication system with the possibility of D2D interaction, to evaluate their capacity and energy efficiency. The presented mathematical approach takes into account the dynamics of user traffic in time and the placement of system nodes in space, which is confirmed by simulation results.

PERANCANGAN DAN IMPLEMENTASI JARINGAN FAILOVER MENGGUNAKAN PROTOKOL SPANNING TREE PADA PT. PLN UP3B KALIMANTAN TIMUR

The availability of electricity is very reliable as a main of supporting component in development progress and economic growth. PT. PLN as an authorized implementation unit for distributing and regulating electricity supply from the power plant to the transmission line requires a reliable network communication system for its operations, as a facility to connect all of its main substations. The disruption of the information network is an important thing that must be avoided in the company so that it does not interfere the distribution of information. The reliable information distribution methods from the main office to the branch offices should be failover that uses backup links in all branch offices as a solution to keep the information network system reliable by using the protocol of spanning tree and VLAN configuration on the routers and manageable switches. Having used the failover method on a network system, it is expected to help the company to always keep reliable in distributing information to all substations so that information loss can be drastically reduced.

Research on Dynamic Identity Authentication Mechanism Based on Digital Signature

With the economic development of globalization, the widespread Internet and the continuous establishment of national informatization, information security has become the focus of the national security guarantee system. Identity authentication is the first line of defense of the network communication system and the network security portal. Cryptography is the core content of the information security system and is widely used in various applications such as network security and data security. As the cornerstone of network security, since passwords are easy to be stolen or lost, it is not safe to authenticate identity with static passwords alone. Therefore, dynamic identity authentication came into being. It effectively resists the main security threats and attacks faced by static password authentication, solves the main drawbacks of static password authentication technology, and effectively prevents replay attacks. In addition, dynamic identity authentication solves the problem of static passwords being stolen in the database or stolen during transmission, thereby preventing illegal users from intruding and accessing the system. This article first studies the principle of digital signature technology and the design idea of dynamic identity authentication, and combines the advantages of both to propose a new dynamic identity authentication system based on digital signature technology.

A Robust Orientation System for Inclinometer With Full-Redundancy in Heavy Industry

In the heavy industry, high-quality inclinometer has been required in terms of accuracy, stability, and safety function for durable use in harsh environments. This paper proposes a robust orientation system for industrial inclinometer based on Microelectromechanical Systems (MEMS) accelerometer. An industrial motor (Vexta) is used as an oriental reference. The STM microcontroller (MCU) has the role of memorizing the inclination sent from the motor with the corresponding acceleration into a Lookup Table (LUT) by using Flash memory. The full redundancy included dual accelerometers and MCUs to enhance the safety function for the operating system via two inclination channels. The support from the Low-pass filter and the zero-offset compensation for temperature change contribute to the measurement precision. For industrial applications, Control Area Network open (CANopen) is used as an embedded network communication system. Both static and dynamic cases were tested to verify the behavior of the inclination sensor. The designed structure provides high efficiency for inclinometer performance with accuracy ±0.2° and the stability is always guaranteed thanks to safety function. The designed inclinometer was used for a real excavator to verify its stability and operating performance. The project was carried out at the ’Sensor System’ in Italy, an industrial company in the inclinometer field.

Intelligent Home Control and Communication Network System Focused on Wireless Sensors

Intelligent Home Control and Communication Network System Focused on Wireless Sensors

Security Model and Design of Network Communication System Based on Data Encryption Algorithm

Implementing cryptographic services based on network communication systems, improving data encryption algorithms, and providing basic support for secure communication technologies use homomorphic encryption to secure network communications systems data security in the process of communicating with cloud machine learning services; transplant cloud machine learning models into network communication systems, directly compute machine learning models based on network communication systems, and perform traffic intrusion detection. According to the software design and development process, the use case diagram has been used to analyse the requirements of the middleware system, and abstract the functional modules that the middleware system should have. Then, the overall structure of the middleware system is designed, the overall process of the system is determined, and each functional module is designed in detail, and then the interaction and dependencies between the modules are determined through the sequence diagram.

Adaptive Event-Triggered SMC for Stochastic Switching Systems With Semi-Markov Process and Application to Boost Converter Circuit Model

In this article, the sliding mode control (SMC) design is studied for a class of stochastic switching systems subject to semi-Markov process via an adaptive event-triggered mechanism. Network-induced communication constraints, semi-Markov switching parameters, and uncertain parameters are considered in a unified framework for the SMC design. Due to the constraint of measuring transducers, the system states always appear with unmeasurable characteristic. Compared with the traditional event-triggered mechanism, the adaptive event-triggered mechanism can effectively reduce the number of triggering than the static event-triggered mechanism. During the data transmission of network communication systems, network-induced delays are characterized from the event trigger to the zero-order holder. The aim of this work is to design an appropriate SMC law based on an adaptive event-triggered communication scheme such that the resulting closed-loop system could realize stochastic stability and reduce communication burden. By introducing the stochastic semi-Markov Lyapunov functional, sojourn-time-dependent sufficient conditions are established for stochastic stability. Then, a suitable SMC law is designed such that the system state can be driven onto the specified sliding surface in a finite-time region. Finally, the simulation study on boost converter circuit model (BCCM) illustrates the effectiveness of the theoretical findings.

An Accurate and Real-Time Commercial Indoor Localization System in LTE Networks

In this paper, a commercial high-accuracy, low-cost and real-time indoor building-level localization system is proposed, which is applicable for locating the Minimization of Drive-Tests (MDT) data in the long-term-evolution (LTE) cellular communication network system. The system utilizes MDT data containing Global Navigation Satellite Systems (GNSS) information which is easy to collect and low cost to assist indoor localization, instead of using indoor drive test (DT) data which needs high manual collection and maintenance costs. In order to compensate for the loss of location accuracy, this paper innovatively divide the online process into two phases: indoor and outdoor (IO) identification phase and indoor localization phase. A real-time and precise GMM-based unsupervised algorithm is applied to identifying if the non-GNSS MDT data is in indoor environment in IO identification phase. Then, a multi-class classification algorithm based on Bayesian classifier is used to locate indoor MDT data to the specific building. The results of experiments conducted in an in-service LTE network using more than 100 LTE base stations demonstrate that the proposed technique yields a IO identification accuracy of 90% and an indoor location accuracy of 49.3m(@67%) respectively, which provides at least 30.2% enhancement in location accuracy compared to traditional technology without DT fingerprint database. This proposed indoor localization technique is applicable in network optimization and Operation and Maintenance (O&M) to assist communication service providers to reduce their operating expense (OPEX) by locating those MDT data without GNSS information.

Leader-follower consensus control for linear multi-agent systems by fully distributed edge-event-triggered adaptive strategies

This paper focuses on investigates the leader-follower consensus problem for linear multi-agent systems (MASs). In order to reduce the frequency of system network communication, this paper first designs three kinds of triggering mechanisms, for the leader, the edges composed of the leader and informed followers, and the edges composed of uninformed followers, respectively. All agents in the MASs do not transmit information until the corresponding triggering mechanisms are satisfied, thus avoiding continuous communication and saving system resources. Then, two kinds of fully distributed edge-event-triggered adaptive protocols are designed to solve the leader-follower problem. The first state feedback control protocol is applicable to scenarios where all states of MASs are available. The second output feedback control protocol does not depend on the availability of the states of MASs. Moreover, under the designed triggering mechanisms and fully distributed edge-event-triggered adaptive consensus strategies, the MASs do not exhibit the Zeno behavior. Finally, two practical simulations are introduced to verify all the theoretical results obtained in this paper. Furthermore, in order to further demonstrate the advantages of the proposed methods, a comparative experiment is performed.

An overview of massive MIMO localization techniques in wireless cellular networks: Recent advances and outlook

The massive multiple-input-multiple-output (mMIMO) antenna systems are well known for their capability to achieve high spectral efficiency in wireless communication systems thanks to millimeter waves (mmWaves) which allow a large number of antennas to be deployed at the base stations (BSs). Aside from communication-based services, mMIMO BSs are presently being exploited for location estimation of user equipment due to their high angular resolution, low-cost implementation, and excellent performance in the indoor and clutter urban environments where line-of-sight may not be available. Although various mMIMO localization solutions have been proposed, there are still pressing issues yet to be resolved. To this end, this article first provides an overview of recent and relevant state-of-the-art survey papers on localization. Further to this, we provide various foundational background concepts based on the existing localization techniques applicable to mMIMO localization systems. Furthermore, we discuss various methods under each technique and we also identify some critical factors to be considered in a practical radio environment. Based on these techniques, we provide a comprehensive review of recent works on mMIMO localization. Finally, we suggest key research directions to be addressed in the future and also we discuss key enabling technologies that will enhance the performance of localization systems in 6G communication networks.

Assessment of the robustness of cyber-physical systems using small-worldness of weighted complex networks

This paper extends the definition of Small-worldness to weighted complex networks and uses it to assess the robustness of Cyber-physical Critical Infrastructure Systems (CPCIS) and consequently to identify system critical components. System uncertain parameters – electric power system loading and communication network latency, are first incorporated in the model, and small-world property indices – Characteristic Path Length, Clustering Coefficient, and small-worldness are assessed in their dynamic (time-varying) forms to represent real-time uncertain criticalities, evaluated using probability distribution functions. The most critical physical and cyber system components are then identified, and their dependencies on physical and/or cyber system are identified. It was clearly demonstrated that the CPCIS components are mutually dependent on each other and that this dependency (represented by the drop of dynamic small-worldness in one system if a failure occurs in the other system) might vary from bus to bus. The proposed methodology is illustrated on a realistic interconnected 1326-bus transmission network and 88 bus star-connected ICT network, divided into 6 control zones.

Design of A Dual-Wide Band BPF Utilizing Parallel Coupled Microstrip Lines and A Centered Arrow-Shaped Resonator

This paper presents a dual wide-band band pass filter (DWB-BPF) by using two parallel, symmetrical micro-strip lines loaded by a centered resonator, consisting of a T- and a triangle-shaped geometry, attached at the lower and upper ends, respectively. The filter reveals good performance and both the passbands can be independently controlled by adjusting specific parts of the filter. The proposed BPF is simulated by using CST microwave studio package and the simulated result is verified experimentally with good agreement between the two results. The fabricated prototype BPF demonstrates two passbands located at 2.3 GHz and 6.35 GHz center frequencies with 39% and 23.6% of 3-dB fractional bandwidth (FBW), respectively and a good insertion and return losses. The designed BPF can be targeted for wireless local area network (WLAN), WIFI and satellite communication systems.

An Ontology-Based System to Collect WSN-UAS Data Effectively

Sensor networks have proliferated because of their ease of deployment, low cost, and lifespan. Traditional means of data harvesting are through a mesh network of intermediate nodes. However, there exist some outdoor environments, where the orography, low density of sensors, communication range, and many other issues favor the use of unmanned aerial systems (UASs) to gather data from remote sensors. This approach (wireless sensor network-UAS, WSN-UAS) is simpler and more affordable compared with the deployment of a fixed communication network system but it introduces new challenges in the form of limited flight autonomy, and transmission and reception issues due to the mobility of the sink. This article presents an ontology-based path planning adaptation system, which is later integrated into the UAS payload providing autonomous flight replanning. It reduces the energy consumption of UAS and increases the data throughput of the WSN-UAS network by avoiding unnecessary journeys, improving the overall efficiency.

Multipath TCP security over different attacks

AbstractDue to the increasing demand for bandwidth and availability of multi‐homed devices, the Multipath TCP (MPTCP) is an emerging protocol that uses multiple paths simultaneously to transfer the data, seamlessly utilizing their bandwidth. The security is an important issue in a system especially the communication network system. Since there are multiple paths in MPTCP, it has many doors open to an adversary especially at the time of connection initiation. These attacks include the man‐in‐the‐middle attack (MM), denial‐of‐service (DOS) attack, and SYN flooding attack. This article proposes a new opportunistic security protocol, named as secure connection multipath TCP (SCMTCP), that uses the elliptic curve cryptography to generate the secret key. It also uses a third‐party certificate authority to ensure the authenticity of public keys exchanged between the communicating parties. The SCMTCP generates a session key at the time of initial handshake (with MP_CAPABLE option) and protects the MPTCP from the man‐in‐the‐middle attack. It generates a unique authentication key for each new subflow within the host using the session key to authenticate them and protects the MPTCP from DoS and SYN flooding attacks. This article analyzes the security complexity of the SCMTCP using the random oracle model and shows that it is not possible for an attacker to get any security key and breaks the MPTCP security.

Implementation and design of the control system for poloidal field power supply

• Three layers of subsystems are constructed for the control system of EAST poloidal field power supply. • Architecture based on real-time system and high speed communication network is proposed to make control loops on power supply controllers running at strict cycle-time. • Handy human-machine interface and sensitive alarming mechanism based on EPICS are achieved to monitor the power system. • Unified external clock and external trigger scheme are developed to enhance the data acquisition management system. This paper introduces the architecture and characteristics of the poloidal field power supply, and describes the architecture of its control system, which is composed of data acquisition management system, operation monitoring system and real-time control system. According to the characteristics of the control system, a data acquisition management system based on Qt, an operation monitoring system based on EPICS and the real-time control system is based on Linux real-time kernel are designed. The control system realizes real-time control of EAST poloidal field power supply system in 1 ms cycle time, and the equipment status detection and monitoring, data acquisition, storage and inspection. Several experiments have proved that the control system definitely meets the requirements of the poloidal field power supply control system in the complex situations under magnetic fields.