Wake on Lan with ATMega

Tato práce podrobně popisuje realizaci zapnutí počítačů v síti pomocí funkce Wake on Lan, implementování www serveru do mikroprocesoru a měření teploty. K tomuto je využito mikroprocesoru ATmega 32, teplotního čidla DS18B20 a ethernetového modulu ENC28J60. V úvodní části jsou popsány jednotlivé komponenty a vysvětlena jejich činnost. Dále jsou zde popsány využívané packety protokol TCP/IP a princip www serveru. V poslední části je popsána realizace www serveru s funkcí Wake on Lan a zobrazováním teploty na internetové stránce serveru.The bachelor´s thesis describes realization of switch on computers using Wake on Lan function, implementation of web server into the Microcontroller and temperature measurement. For this purpose, it is used microcontroller ATmega 32, temperature sensor DS18B20 and Ethernet module ENC28J60. The introductory chapter describes all components and explains their functions. Following part contains a description of packet protocols TCP/IP and principle of the web server. In the last section, it is described the realization of th web server with funcion Wake on Lan and depicting of the temperature on the web page of the server.

PCODE: an efficient and reliable collective communication protocol for unreliable broadcast domain

Existing programming environments for clusters are typically built on top of a point-to-point communication layer (send and receive) over local area networks (LANs) and, as a result, suffer from poor performance in the collective communication part. For example, a broadcast that is implemented using a TCP/IP protocol (which is a point-to-point protocol) over a LAN is obviously inefficient as it is not utilizing the fact that the LAN is a broadcast medium. We have observed that the main difference between a distributed computing paradigm and a message passing parallel computing paradigm is that, in a distributed environment the activity of every processor is independent while in a parallel environment the collection of the user-communication layers in the processors can be modeled as a single global program. We have formalized the requirements by defining the notion of a correct global program. This notion provides a precise specification of the interface between the transport layer and the user-communication layer. We have developed PCODE, a new communication protocol that is driven by a global program and proved its correctness. We have implemented the PCODE protocol on a collection of IBM RS/6000 workstations and on a collection of Silicon Graphics Indigo workstations, both communicating via UDP broadcast. The experimental results we obtained indicate that the performance advantage of PCODE over the current point-to-point approach (TCP) can be as high as an order of magnitude on a cluster of 16 workstations

Secure local area network services for a high assurance multilevel network

To reduce the cost and complexity of the current DoD information infrastructure, a Multilevel Secure (MLS) network solution eliminating hardware redundancies is required. Implementing a high assurance MLS LAN requires the ability to extend a trusted path over a TCP/IP network. No high assurance network trusted path mechanisms currently exist. We present a design and proof- of-concept implementation for a Secure LAN Server that provides the trusted path between a trusted computing base extension (TCBE) servicing a COTS PC and protocol servers executing at single sensitivity levels on the XTS-300. The trusted path establishes high assurance communications (over a TCP/IP network) between a TCBE and the Secure LAN Server. This trusted channel is used first for user authentication, then as a trusted relay between the protocol server and TCBE. All transmitted data passed over the LAN can be protected by encryption, providing assurance of integrity and confidentiality for the data. This thesis documents the implementation of a demonstration prototype Secure LAN Server using existing technology, including high assurance systems, COTS hardware, and COTS software, to provide access to multilevel data in a user-friendly environment. Our accomplishment is crucial to the development of a full scale MLS LAN.http://archive.org/details/securelocalrenet1094513583U.S. Navy (U.S.N.) authors.Approved for public release; distribution is unlimited

Class-Based Weighted Window for TCP Fairness in WLANs

The explosive growth of the Internet has extended to the wireless domain. The number of Internet users and mobile devices with wireless Internet access is continuously increasing. However, the network resource is essentially limited, and fair service is a key issue in bandwidth allocation. In this research, the focus is on the issue of fairness among wireless stations having different number and direction of flows for different required bandwidth to ensure that fair channel is fairly shared between wireless stations in the same class of bandwidth. It is shown that the current WLANs allocate bandwidth unfairly. It is also identified that the cause of this problem of unfairness is the TCP cumulative ACK mechanism combined with the packet dropping mechanism of AP queue and the irregular space for each wireless station in AP queue. The proposed method allocate converged bandwidth by introducing a Class-Based Weighted Window method which adjusts the TCP window size based on the current conditions of the network and according to the network’s requirements. This method works in wireless stations without requiring any modification in MAC. It can guarantee fair service in terms of throughput among wireless users whether they require the same or different bandwidth.Wireless LAN, TCP, Fairness

Observation of Enhanced Network Performance in IoT Process Control and Data Sensing with RINA

Internet of things (IoT) is one of the leading technologies which spanned from the trivial consumer applications to time-critical industrial applications. The current research in IoT focuses mostly on network performance as it is experiencing bottlenecks in data communication. IoT communication preferred UDP due to the limitations of TCP hard-state handshaking procedures on throughput. Proposed work developed a prototype with IoT devices communicating on a new internet architecture i.e. recursive inter-networking architecture (RINA) which has eliminated hard-state handshaking procedures. The impact of RINA on the network performance in process control and data acquisition is observed in terms of latency variations, network jitter and throughput. The results were compared against the network performance when the proposed prototype was communicating on TCP/IP. A Comparative analysis was provided to identify the improved network performance in RINA. This prototype was implemented in closed network configurations like LAN and WLAN in RINA as well as TCP/IP

EMBEDDED H.263 STREAMING PADA JARINGAN LAN MELALUI PROTOKOL TCP IP BERBASISKAN DSP TMS320C6416 (Embedded H.263 Streaming in Local Area Network (LAN) over TCP IP based on DSP TMS320C6416)

ABSTRAKSI: DSKcam adalah sebuah smart kamera sistem yang mampu bekerja secara real-time dengan performansi DSP yang tinggi dalam kemampuan mengolah citra. DSKcam menyediakan fiture antara lain capture gambar dalam format RGB serta YUV pada resolusi VGA ataupun QVGA yang mampu menghasilkan kualitas gambar digital hingga 30fps dan didalamnya juga terdapat embedded TCP/IP Ethernet module berdasarkan pada device WizNET W3100. Pada Tugas Akhir ini direalisasikan sebuah Embedded H.263 Streaming yang diimplementasikan pada jaringan LAN. Embedded H.263 Streaming diatur menggunakan DSP TMS320C6416 sebagai sentral proses kerja pengolahan video coding dan proses integrasi pada jaringan LAN. Protokol TCP IP ditanamkan pada DSP TMS320C6416. Protokol TCP IP yang digunakan adalah Transport Control Protocol (TCP),serta Internet Protokol (IP). Pada penelitian ini akan dianalisis performansi Embedded H.263 Streaming yang diimplementasikan langsung pada jaringan LAN. Analisis kualitas dijaringan dilakukan dengan melakukan pemberian background traffic serta pengamatan terhadap penambahan jumlah client untuk mengetahui parameter QoS seperti delay, jitter, throughput. Adapun analisis kualitas hasil streaming dengan menggunakan parameter Mean Opinion Square (MOS) serta parameter Peak Signal to Noise Ratio (PSNR).Dari hasil pengamatan yang telah dilakukan, embedded H.263 sebagai server streaming sudah bekerja dengan baik. Hal ini dibuktikan dengan nilai QOS meliputi delay,jitter,throughput sesuai dengan standar yang telah ditetapkan. Kualitas video output dari sistem yang dihasilkan bagus dan tajam. Nilai PSNR yang didapatkan cukup baik untuk video format H.263 dengan resolusi QVGA dengan nilai MOS 3,6 dan PSNR 30,22 dB.Kata Kunci : DSKcam ,Embedded H.263 Streaming, TCP/IP, DSP TMS320C6416ABSTRACT: DSKcam is a smart camera system that is capable of working in real time with a high-performance DSP capabilities in the process image. DSKcam provide some applications, one of applications is can capture images in RGB and YUV format at VGA or QVGA resolution that is capable of producing quality digital images to 30 fps and inside there are also embedded TCP / IP Ethernet module based on the device WizNET W3100.At this essay revealed a H.263 Embedded Streaming implemented on the LAN network. Embedded H.263 Streaming using TMS320C6416 DSP is set to use as a central process of processing video coding and integration processes on the network LAN. Protocol TCP IP plants in the TMS320C6416 DSP. TCP IP protocol that is used Transport Control Protocol (TCP), seta Internet Protocol (IP). In this research will analyze Embedded Streaming H.263 performance that implemented directly on the LAN network. Quality analysis is done on the network to provide background traffic and the number of additional observations to the client for the QOS parameters such as delay, jitter, and throughput. The quality of the streaming analysis results by using the parameter Mean Opinion Square (MOS) and the parameters Peak Signal to Noise Ratio (PSNR).From the results of the observations made, Embedded H.263 as the streaming server is working properly. This is evidenced by the value QOS include delay, jitter, and throughput in accordance with the standards set. Quality video output of the system produced well and sharp. PSNR value obtained is quite good for the H.263 video format with QVGA resolution with value of MOS 3.6 and PSNR 30.22 dB.Keyword: DSKcam ,Embedded H.263 Streaming, TCP/IP, DSP TMS320C641