Data Transfer Channel Research Articles

A Simultaneous Wireless Power and High-Rate Data Transfer System Based on Transient Responses Regulation

In this letter, a simultaneous wireless power and data transfer (SWPDT) method for wireless power transfer systems is proposed. Data and power are transferred via the same coupler. To achieve a high transfer power and a high data transfer rate, double-side LCC compensation topology with band-pass filtering is adopted to create a favorable condition for data transfer. An inductor fully compensated at the power carrier frequency and connected serially with the coupled coil is used to inject and extract the data carrier and multiplexed to conduct the power carrier. In addition, the duration time of the transient responses of the data transfer channel is regulated based on complex frequency-domain analysis. Finally, a 1.1 kW SWPDT experiment prototype with a data transfer rate of 1 Mbps and a data transfer delay of 0.4 μs is built to verify the feasibility of the proposed method.

Simultaneous Wireless Power and Data Transfer System With Full-Duplex Mode Based on LCC/CLC Resonant Network

Demand for the wireless power transmission system with real-time and full-duplex data transmission, a high-frequency carrier injection full-duplex simultaneous wireless power and data transfer (SWPDT) system is proposed. An <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCC/CLC</i> compensation structure is applied in the power transfer channel to achieve voltage stabilization and reduce the power interference on the data transmission. An <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> parallel branch is utilized in the data receiving circuit to suppress ipsilateral data source crosstalk in full-duplex communication. This article theoretically demonstrates the voltage gain characteristics of the power and data transfer channels. Then, the crosstalk between bidirectional data transmission is discussed, along with the analysis of the power effect on the data transmission. In addition, the parameter design method is presented to optimize the data transmission gains while suppressing interference and crosstalk. Finally, the experimental prototype with 20 W output power, 250 kbps forward data rate, and 170 kbps backward data rate is built to verify the correctness and effectiveness of the proposed full-duplex SWPDT system.

Distinctive Measurement Scheme for Security and Privacy in Internet of Things Applications Using Machine Learning Algorithms

More significant data are available thanks to the present Internet of Things (IoT) application trend, which can be accessed in the future using some platforms for data storage. An external storage space is required for practical purposes whenever a data storage platform is created. However, in the IoT, certain cutting-edge storage methods have been developed that compromise the security and privacy of data transfer processes. As a result, the suggested solution creates a standard mode of security operations for storing the data with little noise. One of the most distinctive findings in the suggested methodology is the incorporation of machine learning algorithms in the formulation of analytical representations. The aforementioned integration method ensures high-level quantitative measurements of data security and privacy. Due to the transmission of large amounts of data, users are now able to assess the reliability of data transfer channels and the duration of queuing times, where each user can separate the specific data that has to be transferred. The created system is put to the test in real time using the proper metrics, and it is found that machine learning techniques improve security more effectively. Additionally, for 98 percent of the scenarios defined, the accuracy for data security and privacy is maximized, and the predicted model outperforms the current method in all of them.

Simultaneous Wireless Power and Data Transfer System With Full-Duplex Mode Based on Double-Side LCCL and Dual-Notch Filter

The data transmission is always necessary for wireless power transfer systems, and however, the interference between power and data is the major problem for the full-duplex simultaneous wireless power and data transfer (SWPDT) system. To solve this problem, in this article, a novel SWPDT system based on the double-side <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCCL</i> and dual-notch filter is proposed. In the power transfer channel, by the double-side <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCCL</i> topology, the high impedance of power branches at the data carrier frequency reduces the power interference largely. In the data transfer channel, the dual-notch filter is utilized to separate the data carriers and realize the full-duplex communication, which could reduce the ipsilateral data interference and improve the signal-to-noise ratio (SNR). The transfer functions of data transmission are derived by the analysis on the impedance of each part. Since the interferences of power and ipsilateral data source are analyzed, the expression of SNR could be derived and the corresponding factors to improve the SNR are discussed. An optimization of data transfer channel to maximize the SNR is proposed by shifting the dual-notch filter and transformers. The experimental setup with 400-W output power and 200-kb/s data rate is conducted to verify the feasibility of the proposed SWPDT system and the correctness of the design method.

The System Simulating the State of the Objects and the Process of Their Monitoring with the Help of the Convolutional Neural Network

In this paper, the implementation of the system simulating the states of the objects and the process of their monitoring is considered. The tasks for this system include detection and diagnosis of defective states of the studied objects. In order to configure flexibly the system and to reduce the human factor, the use of neural networks is proposed. The model of the complex for the object monitoring simulation is presented. It is introduced in the form of a software application and is tested as a part of a diagnostic system fitted in the railroad track measuring car. This system makes it possible to determine the dimensions of artificial structures on the railway and, most importantly, to find the sites where the standard overall dimensions are reduced due to the deviation of separate structural elements from their designed position. The algorithmic and mathematical support employed in this paper allows determining the geometric (dimensions and position in space), the kinematic (speed and direction of movement) and the dynamic (motion acceleration, unredeemed car acceleration) characteristics of both moving and stationary objects. During its implementation, such system takes the form of a software and hardware complex equipped with movable and fixed photodetectors, depending on the set of tasks to be solved. A characteristic feature of this study is that the methods and the algorithms it proposes for image processing can be adapted and used in building digital twins of transport infrastructure objects including not only the railway tracks but also various technological and service facilities. Due to this approach, the input of the nodal points of infrastructure objects and their elements can be automated into the project design scheme, exponentially reducing the laboriousness of creating primary models. The aggregation of the proposed methods with the capabilities of modern neural networks improves the primary image processing speed on the side of the client application, without fully occupying the data transfer channel between different modules of the information-measuring complex.

Transferring power and data simultaneously of different direction in ultrasonic contactless power transfer system

Ultrasonic contactless power transfer (UCPT) technology is a new kind of contactless power transfer (CPT) technology, which can be used to transfer power to loads in enclosed metal containers. In this paper, an UCPT system of transferring power and data simultaneously of different direction using only one pair of transducer is proposed. In the proposed system, power is transferred from the transmitting side to receiving side, and data is transferred in reverse direction simultaneously, from receiving side to transmitting side. The proposed system consists of power transfer channel and data backward transfer channel. The power transfer channel is modeled and the data backward transfer channel is analyzed in detail. 2ASK technology is used in data transfer channel. To show the effectiveness of the proposed system, an experimental setup is built. For power transfer channel, the output power is up to 40 W, and for data transfer channel, the data transfer rate is up to 1.6 kbps in ideal situation. When transferring a picture, the data transfer rate is 1.43 kbps and the output voltage is 5V which are realized at the same time.

6G Networks Physical Layer Security Using RGB Visible Light Communications

Visible Light Communication (VLC) is a key technology for the sixth-generation (6G) wireless communication thanks to the possibility of using artificial environmental lights as a data transfer channel. Although VLC systems are more resistant against interference and less susceptible to security vulnerabilities like most wireless networks, VLC is even inherently susceptible to eavesdropping attacks. Moreover, since VLC is considered an enabling technology for 6G, specific mechanisms are needed to enforce data security. This paper considers improving the security of the next generation of wireless communications by using the Watermark Blind Physical Layer Security (WBPLSec) in VLCs. The main intuition is that RGB LEDs offer the possibility for Wavelength Division Multiplexing (WDM) as a useful support for the Spread-Spectrum (SS) watermarking. In this paper, we propose an approach that aims at obtaining VLC Physical Layer Security (PLS) by combining watermarking with an RGB LED jamming. We provide a performance analysis of the proposed security architecture based on the secrecy capacity in terms of its existence and outage probability. We prove that WBPLSec can be used to significantly improve confidentiality in the next generation of wireless communications. The results offer the possibility of creating a secure region around the legitimate receiver by leveraging the jamming optical power.

An Improvement of SNR for Simultaneously Wireless Power and Data Transfer System with Full-Duplex Communication Mode

The power interference is always inevitable in the simultaneous wireless power and data transfer (SWPDT) system resulting in the lower signal to noise rate (SNR) and may cause the failure of communication. Besides, the interference between bidirectional data source is also the problem during the full-duplex communication. To solve these problems, in this article, an improvement of SNR for SWPDT system with full-duplex communication mode is proposed. In the power transfer channel, the double-sided LCCL compensation topology is selected due to its good performance of blocking the power interference on data transmission. Besides, the constant current characteristic of primary coil could guarantee the stability of power transmission. In the data transfer channel, a novel data transmission based on the dual-resonant structure is proposed to suppress the ipsilateral interference, and the full-duplex communication is achieved by two different frequencies. An optimization method of power and data transfer channel to improve SNR further is proposed after the analysis on interferences of power transmission and ipsilateral data source. Finally, the feasibility of proposed topology and the correctness of the parameter design method are verified by the simulation and experimental results.

An Optimization Method for Simultaneous Wireless Power and Data Transfer Systems

Simultaneous wireless power and data transfer (SWPDT) technology is usually needed in wireless power transfer (WPT) systems. In this paper, to achieve the efficient and stable SWPDT, the signal to noise rate (SNR) is first optimized through the analysis of data transmission gain and the interference of power transfer on data transfer. In order to reduce the interference of power channel to data transfer channel, the compensation topology of double-sided LCC and the band-stop networks are used. To solve the problem of SNR limitation, the coupling relationships between each circuit are taken into consideration and a matching method of resonance parameters to improve the SNR is presented. Based on the relationship between SNR and the parameters of data transfer channel, an optimization design method focused on parameters of data transfer channel for improving the SNR is presented. Finally, the feasibility and the correctness of the parameter design method proposed in this paper is verified by simulation and experiment.

Simultaneous Wireless Power Transfer and Full-Duplex Communication With a Single Coupling Interface

A method to achieve simultaneous wireless power transfer and full-duplex communication with a pair of coupling coils is proposed in this article. A double-side LCC compensation topology for power transfer is adopted, while the data transfer channel is constituted by a four resonance dual-rejection structure. In the process of power transfer and full-duplex communication, from the view of data transmitting and receiving, the data transmitting/receiving circuits on one side can not only transmit/receive the desired data carriers but also block the interference data carriers, and from the view of power transfer, the rated power transfer can be realized with little influence. Moreover, the parameter design method of the proposed system is given. Besides, the interference between the power wave and data carriers and the crosstalk between the data carriers are analyzed. Finally, an experimental prototype is built, which achieves an output power of 600 W and a data transmission rate of 80 kbps.

ROBUST TELECOMMUNICATION CHANNEL WITH PARAMETERS CHANGING ON A FRAME-BY-FRAME BASIS

An approach is proposed to design of a robust data transfer channel for telecommunication networks that is based on the desired bits spectrum spreading and their additional scrambling by using two pseudo noise coding sequences derived from primitive polynomials of eighth and fifteenth degrees. Further information protection is offered to be achieved by deploying four 32768 chip-long pseudo noise coding sequences, instead of one, with 128 cyclic shifts each. It is proven that selection of a scrambling sequence and its cyclic shift according to a secret algorithm on a frame-by-frame basis helps substantially improve performance of the telecommunication channel in terms of protection against interception while preserving its useful properties. Research results permit to claim that the designed telecommunication channel could be used in noise immune and concealed telecommunication networks.

ВИКОРИСТАННЯ ЦИКЛІЧНИХ ЗСУВІВ ПСЕВДОВИПАДКОВОЇ КОДОВОЇПОСЛІДОВНОСТІ ДЛЯ ПІДВИЩЕННЯ ХАРАКТЕРИСТИК ТЕЛЕКОМУНІКАЦІЙНОГО КАНАЛУ

An approach is proposed to design of noise immune and concealed data transfer channel for telecommunication networks. Attention is paid to securing hidden information transmission, as well as its protection from interception by rogue actors. The approach is based on the desired bits spectrum spreading and their additional scrambling by using pseudo noise coding sequences derived from primitive polynomials of eighth and fifteenth orders, which possess good auto and inter correlation properties. It is studied performance of the telecommunication channel that includes frames of 128 bit length, each of which is spectrally spread 256 times with the help of a synthesized pseudo noise coding sequence. The second 32768 chip-long pseudo noise coding sequence is used to mark the frame duration and perform additional information scrambling. Computer simulation is used to study performance of the designed telecommunication channel. The computer simulation helped to establish that the processing of the additive mixture of the desired signal and interfering ones, which surpass the desired signal two times in terms of power, by the matched filters permits to confidently reveal the information frame structure being transmitted by determining frame beginning pulse and establish the bit values of the desired information. Further improvement of information protection from interception is proposed to achieve by using cyclic shifts of 32768 chip-long pseudo noise coding sequence. Computer simulation helped to find out that ignorance of the cyclic shift leads to inability of information interception by the rogue elements. Research results, obtained in this paper, permit to claim that the designed telecommunication channel, with cyclic shifts according to a secret rule, could be successfully used in practical implementations of noise immune and concealed telecommunication networks.

A Decoupled Power and Data-Parallel Transmission Method With Four-Quadrant Misalignment Tolerance for Wireless Power Transfer Systems

In this letter, a new power and data-parallel transmission method for wireless power transfer (WPT) systems based on a magnetically decoupled coupling structure is proposed. Unipolar coils are used for power transfer, while series-connected perpendicular bipolar coils are used for data transfer. Data transfer coils are placed in overlap with the power transfer coils at both primary side and secondary side, respectively, to form a compact structure. Especially, the side lengths of data transfer coils are intentionally designed to be smaller than the power transfer coils. Thus, in the specific four-quadrant misalignment area, the crosstalk interference between power and data transfer channels can almost be neglected, resulting in a straightforward design of data processing circuit. With the proposed coupling structure, data transfer presents a symmetrical misalignment ability. Moreover, the data transfer channel is utilized to conduct the closed-loop control of output voltage in the WPT system. Thus, in the specific four-quadrant misalignment area, stable power transfer can also be achieved. The feasibility of the proposed power and data-parallel transfer method is verified by a 122-W laboratory prototype. The system efficiency reaches 87% and data transfer rate is 19.2 kb/s. (This letter is accompanied by a video demonstrating the experimental test).

Science DMZ network architecture deployment and performance evaluation to large scaled data transfer efficiency

Background/Objectives: Recently, it has been great issue to transfer large-scale science dada such as scientific field of high energy physic, astronomical space, super-computing simulation. To solve the transfer issue and to increase transfer efficiency, it needs a multi-dimensional approaches.Methods/Statistical analysis: To improve the transfer performance, approaches from the perspective of components such as network equipment, transmission protocol, and transmission application have been suggested. Effort to TCP congestion control algorithm and parallelism of data transfer channel are representative example to improve performance. However, the solution through the each component has a limitation in maximizing the transmission efficiency.Findings: Science DMZ is a new network architecture that can maximize transfer performance. It maximizes transfer efficiency through approach to all components, such as network equipment, dedicated network path, transfer applications, and local institute firewall policies. With these complicated components, science DMZ network architecture can greatly improve the transfer efficiency. In this paper, we design and construct a science DMZ network architecture between two organizations that utilize supercomputing resources based on KREONET and evaluate the performance.Improvements/Applications: After configuring the experiment environment, we measured network performance through iperf and file transfer performance test through SCP. Experiment result showed around 388% Improvement than that of existing method.

A Secured OpenFlow Protocol Using Elliptic Curves Cryptographic for Software Defined Networks

A Software-Defined Network (SDN) architecture was proposed to enhance the performance, flexibility and scalability of networks. However, SDN features such as centralized controlling, network programmability and virtualization present new security challenges to networks. This article will address security challenges related to SDN connection data transfer channels (i.e., control layer and infrastructure layer) and propose a novel connection data transfer channels architecture based on an OpenFlow protocol. Existing SDN OpenFlow protocols rely on higher layer secure mechanisms such as TLS (Transport Layer Security) / SSL (Secure Sockets Layer) sessions. It is concluded that the transfer of secured data using elliptical curve encryption provides a more efficient SDN network. The proposed architecture was implemented in a testbed and its security features were analyzed.

Wireless data transfer channel in the monitoring systems of oil production wells

Wireless data transfer channel in the monitoring systems of oil production wells

Online Bayesian Data Fusion in Environment Monitoring Sensor Networks

Assuring reliable data collection in environment monitoring sensor network is a major design challenge. This paper gives a novel Bayesian model to reliably monitor physical phenomenon. We briefly review the errors on the data transfer channel between the sensor quantifying the physical phenomenon and the fusion node, and a discrete K-ary input and K-ary output channel is presented to model the data transfer channel, where K is the number of quantification levels at the sensor. Then, discrete time series models are used to estimate the mean value of the physical phenomenon, and the estimation error is modeled as a Gaussian process. Finally, based on the transition probability of the proposed data transfer channel and the probability of the estimated value transited to specific quantification levels, the level with the maximum posterior probability is decided to be the current value of the physical phenomenon. Evaluations based on real sensor data show that significant gain can be achieved by the proposed algorithms in environment monitoring sensor networks compared with channel-unaware algorithms.

Channel-Aware Bayesian Model for Reliable Environmental Monitoring Sensor Networks

We provide a novel statistical-based approach to address the reliable data reception problem for environment monitoring sensor networks. In this paper, a channel-aware Bayesian model is designed to choose the most likely quantization level as the value of the monitored phenomenon at the sink node such that the probability of a correct decision is maximized. Simple methods are presented to formulate both the temporal correlation of the monitored phenomenon and the error information of the data transfer channel between the sensor node which monitors the phenomenon and the sink node as the prior input to this Bayesian device. Evaluation based on real sensor data shows that the proposed model can monitor physical phenomena much more accurately than channel-unaware algorithms.

MOST 네트워크의 동기영역 채널 할당 모듈 설계 및 구현

MOST는 동기식 데이터, 비동기식 데이터, 제어 데이터를 동시에 전송할 수 있는 차량용 멀티미디어 네트워크이며, 동영상이나 오디오를 버퍼링없이 전송할 수 있는 고 대역폭의 동기식 데이터 영역을 제공한다. 이러한 동기식영역을 통해 실시간 데이터를 전송하기 위해서는 소스 노드와 싱크 노드와의 커넥션 및 해당하는 채널의 할당이 요구된다. 본 논문에서는 이러한 동기식 데이터 영역을 사용하기 위한 채널 할당 모듈을 설계 및 구현한 후 실제 MOST 네트워크를 구축하여 노드 간 동기식 데이터 전송을 위한 절차와 채널 할당 방안을 제시하였다. While MOST is an in-vehicle network which transfers concurrently synchronous data, asynchronous data and control data, it provides high bandwidth synchronous section which can transfer video and audio without buffering. To transfer real time data using synchronous section, connections between source node and sink node, and channel allocation for connections are required. In this paper, we proposed synchronous data transfer method and channel allocation method by constructing MOST network after designing and implementing channel allocation module for using synchronous data section.

Magnetic Metamaterials as 1-D Data Transfer Channels: An Application for Magneto-Inductive Waves

Magneto-inductive waves are a form of propagation that only exists in certain types of magnetic metamaterials formed from inductively coupled resonant circuits. These waves are candidates for forming a contactless data channel between suitably designed devices. This paper reports on an investigation into the data carrying capacity of these novel channels in one dimension from both an analytical and experimental perspective. The derivation of a simple analytical model for both channel and resonating terminals is presented based on simple circuit theory. Resonating terminals are found to have potential as efficient transducers of magneto-inductive waves. A simple demonstration device is constructed from copper rings and lumped-element capacitors. Experimental data capacities, determined from experimental data, are of the order of 60 Mb/s for signal-to-noise levels (SNR = 104) measured in the experiments. It is found that an optimum coupling strength exists for the most efficient excitation magneto-inductive waves in the device, and this leads to an understanding of the limits on the coupling and the eventual data capacity in terms of the interresonator coupling. The conclusion is that the optimal coupling for a resonating terminal will be approximately twice the interresonators coupling in the waveguide for 1-D structures and four times for 2-D devices.