Analisis Unjuk Kerja TCP Window Size 64k Menggunakan Algoritma TCP New Reno pada Jaringan Wired dan Wireless

Kemacetan jaringan merupakan masalah serius di jaringan internet yang dapat menimbulkan peningkatan jumlah packet loss. Kemacetan juga dapat menjadi beban jaringan sehingga dapat memperlambat koneksi jika tidak ditangani dengan baik, bahkan dapat menyebabkan kelumpuhan dalam jaringan . Transport Control Protocol (TCP) menyediakan mekanisme transfer data yang dapat diandalkan (reliable), sehingga aliran data yang dibaca TCP receiver tidak rusak, tanpa duplikasi, dan berurutan. Pada penelitian ini, penulis menguji kualitas pengiriman data Transport Control Protocol (TCP) Window Size 64K menggunakan Algoritma TCP New Reno pada jaringan kabel Fast Ethernet dan Wireless 802.11n. Penelitian ini bertujuan untuk mengatasi kemacetan pada jaringan wired dan wireless dengan menggunakan TCP Window Size 64K dan Algoritma TCP New Reno dan membandingkan hasil dari parameter Quality of Service (QoS) yang akan diuji diantaranya adalah throughput, delay, jitter, dan packet loss. Proses simulasi penelitian ini menggunakan Software Riverbed sebagai simulator untuk merancang dan mencari nilai parameter Quality of Service (QoS) pada jaringan wired dan wireless tersebut. Hasil dari penelitian ini menunjukkan bahwa throughput dan delay yang dihasilkan pada jaringan Wireless 802.11n memiliki performa yang lebih baik daripada Wired Fast Ethernet dengan nilai throughput 13050,6 bit/sec dan nilai delay 0,000253344 sec. Adapun jaringan Wired Fast Ethernet memiliki performa jitter dan packet loss yang lebih baik daripada Wireless 802.11n dengan nilai jitter 0,0000000000003 sec dan nilai packet loss 0%.Kata Kunci: Kabel Fast Ethernet, Wireless 802.11n, TCP Window Size 64K, TCP New Reno, Quality of Service (QoS). Congestion Network congestion is a serious problem in internet networks that can cause an increase in the number of packet loss. Congestion can also become a burden on the network so that it can slow down the connection if not handled properly, and can even cause paralysis in the network. The Transport Control Protocol (TCP) provides a reliable data transfer mechanism, so that the data streams that are read by the TCP receiver are not damaged, without duplication, and sequential. In this study, the authors simulated using TCP Window Size 64K with the New Reno TCP Algorithm on Wired Fast Ethernet and Wireless 802.11n. This study conducted a simulation to solve congestion on wired and wireless networks and then compared the results of the Quality of Service (QoS) parameters tested, including throughput, delay, jitter, and packet loss. The simulation process of this research uses Riverbed Software as a simulator to design and find the QoS parameter values on the wired and wireless networks. The results of this study indicate that the resulting throughput and delay on the Wireless 802.11n network has better performance than Wired Fast Ethernet with a throughput value of 13050.6 bits / sec and a delay value of 0.000253344 sec. The Wired Fast Ethernet network has better jitter and packet loss performance than Wireless 802.11n with a jitter value of 0.0000000000003 sec and a packet loss value of 0%.

Accelerating Information Security in Cloud Computing using a Novel Holomorphic Scheme

In the past decades, many security algorithms are invented and used in many applications for encryption and decryption of information or data. All the secure algorithms were uses the security key of size 8bit, 16bit, 32bit, 64bit and 128bits for encryption and decryption but literature survey says that higher the key size, higher the security. But the higher key size has number more bits and its requires more memory for storage and also to perform each and every bit through computational operations leads to more delay. To address these issues, the key and plain text are of 128bits and converted into integer. The converted integer values of key and plaintext are encrypted and decrypted using Holomorphic through Advanced Encryption Standard (AES). The research method is sophisticated and more protected through meaning fully lesser key in size and is accomplished for encryption in terms integer key and plaintext moderately than binary bits, therefore larger size of key and plaintext can be minimized and reduced the computational complexities. Finally the cipher text is uploaded into cloud through Real Time Transport Protocol (RTP) and Real Time Transport Control Protocol (RTCP) for storage. The main problem with continuous sharing of information into cloud is security attacks so in this research work, three different multimedia signals such as ECG, EEG and biomedical images are converted into integer and encrypted using AES. The stored data can access by the authorized users and can decode the information after decryption using AES.

Analisa Kinerja TCP HYBLA pada Jaringan Wireless Mesh Network (WMN)

<p>Wireless Mesh Network (WMN) merupakan topik penelitian yang menarik dan populer beberapa tahun terakhir. Jaringan WMN adalah jaringan komunikasi yang terdiri dari <em>node </em>mesh, <em>router </em>mesh, gateway, dan mesh klien. Jaringan yang dibentuk bisa berupa homogen dan juga heterogen. Kinerja WMN sangat berhubungan dengan TCP. Transport Control Protocol (TCP) adalah connection oriented protokol pada lapisan transport. TCP awalnya dirancang untuk jaringan kabel tetapi juga berkinerja baik dalam jaringan nirkabel. Untuk itu TCP Hybla hadir untuk bekerja pada jaringan yang heterogen. Untuk itu didalam penelitian ini akan dilakukan analisis kinerja TCP Hybla yang berjalan pada WMN. Penelitian ini menggunakan metode penelitian experimental dengan menggunakan network simulator NS-3 untuk mengetahui kinerja TCP Hybla pada WMN. Hasil dari penelitian ini adalah mendapatkan data kinerja TCP Hybla pada WMN yaitu <em>throughput </em>dan <em>cwnd</em>.</p>

Performance of DASH over Multipath TCP

In recent years, dynamic adaptive streaming over HTTP (DASH) is a dominated traffic in Internet. The client requests a suitable video presentation depending on the current network condition. On the other hand, multipath transport control protocol (MPTCP) emerges as a potential transmission protocol for data transfer via multiple network paths. In this paper, we conduct extensively experiments to evaluate the performance of DASH over MPTCP. Four different performance metrics are monitored, i.e., time on high quality, impactful switch, switch frequency, average bitrate. The result shows that MPTCP does not support DASH especially when two paths have different bandwidth.

Improving Performance of Optical Networks by Using FRPI Algorithm

Optical burst switching (OBS) is a new emerging network that is developing rapidly. By increasing the amount of traffic on the Internet the necessity for having networks like OBS ones that can carry heavy traffic is needed. These networks have an important problem due to being bufferless. The congestion control of the network is a little confusing for some protocols like transport control protocol (TCP) Vegas as they are appropriate for conventional wired networks not optical ones. When a drop happens in OBS networks it can be because of two reasons: 1. congestion and 2. Contention that has been possible due to the bufferless nature of the network. When a contention happens and a packet drops, TCP thinks that the network is experiencing heavy load however it may not, and it decreases the sending rate, as a result, it leads to a reduction in the performance of the network. In this paper, we are trying to improve the performance of the network by employing a new algorithm that called Fuzzy-RTT Performance Improver. This algorithm is based on fuzzy logic and round-trip time measurements. Simulative results show that this algorithm outperforms TCP Vegas in terms of throughput and packet delivery count.

Mecanismos de nivel de transporte para la optimización de envíos sobre Long Fat Networks

Este artículo investiga los mecanismos de diferentes protocolos de transporte en transferencias sobre redes de alta capacidad y alto retardo, conocidas como Long Fat Networks (LFNs) para un envío eficiente de los datos. Transport Control Protocol (TCP) presenta limitaciones de rendimiento y flexibilidad. En la literatura se pueden encontrar diferentes propuestas de variantes del comportamiento de TCP, protocolos como Stream Control Transmission Protocol (STCP) o soluciones que proporcionan una comunicación confiable y mecanismos de control de congestión sobre User Datagram Protocol (UDP). En este artículo se presentan una serie de mecanismos de nivel de transporte para la optimización de transferencias de datos sobre redes LFN. Estos mecanismos ofrecen un rendimiento elevado utilizando todo el ancho de banda disponible del enlace mediante un proceso de cálculo del estado de la red y un control de congestión activo para la utilización de todo el bandwidth, a la vez que reactivo en caso de producirse pérdidas para evitar congestiones en la red. El objetivo es demostrar la eficiencia de dichos mecanismos, así como su adaptabilidad y aggressive friendliness respecto a otros protocolos de transporte mediante el despliegue de una serie de pruebas expuestas en este artículo.

Rancang Bangun Mekanisme Load Sharing Pada Link Aggregation Menggunakan Software Defined Networking

Given the level of activity of Internet users is high on lately. Impact on the growing needs for server throughput can be treated with load sharing on link aggregation. However, it possess a problem for UDP protocol data packets which will experience jitter and packet received out of order high. Therefore, the author tries to create an algorithm to share the package which will be sent to the server with weighted round robin method that focuses UDP Protocol data packets. The author uses the Software Defined Networking (SDN) and OpenFlow protocol that is capable of directly reprogrammed network devices. Host connect by sending packets Internet Control Message Protocol (ICMP), Transport Control Protocol (TCP) and User Datagram Protocol (UDP) to the server, then do an analysis of the bandwidth, jitter, datagrams, and retry. The author has successfully implemented with the emulator Mininet and testing. The results indicate that the average jitter is able to be reduced to 50% and packets received out of order is reduced to 0 compared to standard link aggregation with weighted round robin load sharing method. Keywords— Software Defined Netwoking, Link Aggregation, Weighted Round Robin, UDP