Design of Interplanetary Observation Terminal based on All Programmable System-on-Chip

The drastic changes in the solar wind will cause serious harm to human life. Monitoring interplanetary scintillation (IPS) can predict solar wind activity, thereby effectively reducing the harm caused by space weather. Aiming at the problem of the lack of the ability to observe IPS phenomenon of the 40-meter radio telescope at the Yunnan Astronomical Observatory of China in the frequency band around 300MHz, an IPS real-time acquisition and processing scheme based on all programmable system-on-chip(APSoC) was proposed. The system calculates the average power of 10ms IPS signal in PL-side and transmits it to the system memory through AXI4 bus. PS-side reads the data, takes logarithms, packages it, and finally transmits it to the LabVIEW host computer through gigabit Ethernet UDP mode for display and storage. Experimental tests show that the system functions correctly, and the PL-side power consumption is only 1.955 W, with a high time resolution of 10ms, and no data is lost in 24 hours of continuous observation, with good stability. The system has certain application value in IPS observation.

РОЗРОБКА КОМПЛЕКСНОГО ПОКАЗНИКА ЯКОСТІ ОБСЛУГОВУВАННЯ НА ОСНОВІ ПОСТКВАНТОВИХ АЛГОРИТМІВ

Розвиток сучасних технологій дозволяє суттєво розширити цифрові послуги. Для забезпечення послуг в Інтернет-просторі як правило використовуються протоколи цілісності SSL, TLS Однак стрімкий розвиток обчислювальних технологій дозволяє зловмисникам не тільки модифікувати кіберзагрози, а також розробляти нові цільові загрози. Крім того поява повномасштабного квантового комп’ютера, як стверджують спеціалісти НІСТ США, дозволить зламувати симетричні та несиметричні криптосистеми на основі алгоритмів Гровера та Шора за поліноміальний час. В роботі пропонується модифікація протоколу TLS на основі використання, в якості алгоритма, який забезпечує стійкість протоколу TLS, використання постквантових алгоритмів на основі крипто-кодових конструкцій Мак-Еліса та Нідеррайтера на еліптичних кодах. Для дослідження властивостей запропонованого підходу використовується метод багатокритеріального аналізу, який дозволяє сформувати комплексний показник якості обслуговування. Представлені дослідження підтверджують, що використання постквантових алгоритмів в якості алгоритму стійкості в протоколі TLS забезпечують підвищення ефективності на 30% при використанні в мережі на основі Gigabit Ethernet, та в 2 рази при використанні 10 Gb Ethernet

Ultrahigh-speed graphene-based optical coherent receiver

Graphene-based photodetectors have attracted significant attention for high-speed optical communication due to their large bandwidth, compact footprint, and compatibility with silicon-based photonics platform. Large-bandwidth silicon-based optical coherent receivers are crucial elements for large-capacity optical communication networks with advanced modulation formats. Here, we propose and experimentally demonstrate an integrated optical coherent receiver based on a 90-degree optical hybrid and graphene-on-plasmonic slot waveguide photodetectors, featuring a compact footprint and a large bandwidth far exceeding 67 GHz. Combined with the balanced detection, 90 Gbit/s binary phase-shift keying signal is received with a promoted signal-to-noise ratio. Moreover, receptions of 200 Gbit/s quadrature phase-shift keying and 240 Gbit/s 16 quadrature amplitude modulation signals on a single-polarization carrier are realized with a low additional power consumption below 14 fJ/bit. This graphene-based optical coherent receiver will promise potential applications in 400-Gigabit Ethernet and 800-Gigabit Ethernet technology, paving another route for future high-speed coherent optical communication networks.

Using GMSL Technology for Transmitting Stream of High-Quality Video Data

The article is devoted to the description and research of technologies for data flow transmission from video cameras designed for use in modern cars. The paper provides a theoretical analysis of the most popular wired and wireless data streaming technologies, such as Gigabit Ethernet and Wi-Fi. Analysis of the most important characteristics showed, that the mentioned technologies are not effective due to their significant shortcomings, which are critical in the production of cars, and will not allow their usage. The main disadvantages of Gigabit Ethernet technology are the lack of guarantees of full delivery of transmitted data. Given that the data obtained can be used for self-driving control systems, the technology cannot be used for transmitting the data stream to the camera, as there will be a possibility of endangering the safety of the passenger and accidents to the vehicle. Disadvantages of Wi-Fi technology include low data rates and lack of reliable protection against electromagnetic interference. Given the advantages and disadvantages of the above technologies, it was decided to abandon the possibility of their usage and consider suitable options. It is shown, that in the considered conditions, the most expedient solution for data transmission from the video camera is GMSL technology, which makes it possible to significantly increase the resistance to electromagnetic interference, the overall transmission rate, and the quality of the transmitted data. The technical features of GMSL technology, in particular SerDes technology, which is one of the main components of the above technology, are considered. For SerDes technology, the process and features of converting a parallel data stream into a serial, data transmission, and inverse data conversion into a parallel form are described. The usage of this technology makes it possible to transmit data over a distance of up to 15 meters (without significant loss of quality). Described is a method of encoding input data in the format 8b/10b. This encoding makes it possible to ensure the stability of data transmission and their overall resistance to electromagnetic interference. This is achieved by noise of the useful carrier signal. Describes the possibility of restoring the clock signal using the CDR block after receiving data on the differential pair, as it does not contain a separate line for this signal. At the same time the problem of current and voltage balance is solved. The methods of controlling the video camera module and SerDes components using I2C and UART interfaces are shown. The peculiarity of the control signals is that they can be directed in different directions due to the duplex transmission channel. The expediency of using GMSL technology in a device that implements data transmission from the camera module is considered. The advantages of using the described technology and their compliance with the established requirements are given. It is proposed to implement the ability to control the mode of operation of the camera from the control device using GMSL technology.

Design and Implementation of Lightweight Virtualization Using Docker Container in Distributing Web Application with Experimental Methods

The rapid development of website-based applications that can be accessed on various computer platforms and smart phones, causing the infrastructure of web application deployment, especially servers, is needed. This causes sometimes the organization needs to invest in a server. With virtualization, companies can create multiple servers on the same machine, and each server functions as an individual machine. Lightweight based virtualization or known as containers is an approach where the host operating system is shared with a virtual server which means that the parent kernel is shared with virtual servers or containers. The method used is an experimental method, this study measures the effect of a particular treatment on a variable with different treatments. Research variables carried out in the lightweight virtualization system research, including: throughput, Average Latency, response time and Dropped Request. The treatments in this study were tested with 100, 200, 250 and 300 connections simultaneously with 1000, 3000, 5000, 7000 requests.The server service design uses container-based virtualization for the webserver with 2.8 Ghz (4 core) Intel Core i7 processor specifications, 2 GB memory, 80 GB M2 SSD storage, and Gigabit Ethernet capable of handling 250 requests simultaneously, but cannot be accessed when handling 300 requests simultaneously.

Analisa Performance Jaringan Gigabit Ethernet Local Area Network (LAN) Universitas Lampung

Perkembangan Gigabit Ethernet mengalami peningkatan yang cukup pesat. Di Universitas Lampung sendiri telah menggunakan teknologi Gigabit Ethernet sebagai backbone karena mampu mentransmisikan data yang besar serta berkecepatan tinggi. Dengan adanya teknologi Gigabit Ethernet ini, diharapkan peningkatan kualitas intranet yang ada di Universitas Lampung semakin baik kedepannya.Implementasi dari jaringan intranet dengan teknologi Gigabit Ethernet ini perlu diketahui kinerjanya. Pada penelitian ini digunakan metode Design Science Research (DSR) yang memiliki 6 tahapan yaitu identifikasi masalah dan motivasi, menetapkan objek solusi, desain dan pengembangan, demonstrasi, evaluasi, dan pelaporan hasil. Analisa ilmiah ini dilakukan dengan pengukuran terhadap trafik dari jaringan Local Area Netwok (LAN). Parameter yang diukur dan dianalisa adalah bandwidth, delay, jitter, dan packet loss dengan pemberian beban berupa paket data pada TCP dan UDP untuk melihat karakteristik dari jaringan tersebut dengan menggunakan software Jperf dan Wireshark guna melihat baik atau buruknya kualitas dari jaringan intranet Unila. Hasil dari penelitian ini yaitu dapat dikategorikan “Baik” berdasarkan acuan standar ITU-T G.114.Kata kunci: Jperf, Wireshark, Quality of Service, Gigabit Ethernet, DSR, ITU-T G.114.