<p>^{Ethernet functionality testing as a generic term used for checking connectivity,throughput and capability to transfer packets over the network. Especially in the packet-switchenvironment, Ethernet testing has become an essential part for deploying a reliable network.Over a long distance Ethernet testing parameter for analyzing network performance must havetwo devices attached and synchronized.}</p><p>Saab Microwave Systems is among the leading suppliers of radar systems developing groundbased,naval and air-borne radar systems. To ensure the correct functionality, the developerwants to verify the performance of computer network and looking for a suitable solution.</p><p>A software application is required to verify and test the functionality of the Ethernet network andto verify the functionality and performance of the TCP/IP stack of newly added node. Theprograms shall be easily ported to different operating systems and must not depend on specificproduct properties.A software application, <em>“NetBurst”</em>, is developed for Ethernet functionality testing. Theapplication is vendor and platform independent.</p><p><strong> </strong></p>

The result of this master thesis report describes the advantages and the drawbacks that will arise when implementing an Ethernet based intercommunication system in military vehicles. The report presents a possible solution and describes how different sound applications will be implemented into the suggested solution. The report show that IP LAN in vehicles leads to more advantages than drawbacks. The main advantages are that all kind of media can share the same LAN and that there is a lot of knowledge of this technique in the civil area. The main drawback is about delay. The drawbacks are otherwise well known and methods are known to decrease the impact of them. In the suggested intercommunication system the processing delay gives the largest impact on not deliver data in real time. The suggested solution, with separate connections for intercom unit and PC platform to the switch at each crew member gives good reliability and security.

Digital Radio Frequency Memory (DRFM) is a technique widely used by the defense industry in, for example, electronic countermeasure equipment for generating false radar targets. The purpose of the DRFM technique is to use high-speed sampling to digitally store and recreate radio frequency and microwave signals. At Saab Bofors Dynamics AB the technique is used, among others, in the Electronic Warfare Simulator (ELSI). The DRFM technique is implemented in a full-custom ASIC circuit that has been mounted on circuit boards in ELSI. Today, the progress in the programmable hardware field has made it possible to implement the DRFM design in a Field Programmable Gate Array (FPGA). The FPGA technology has many advantages over a full custom ASIC design. Hence, the purpose of this master's thesis has been to develop a new DRFM design that can be implemented in an FPGA, using a hardware description language called VHDL. The method for this master's thesis has been to first establish a time plan and a requirement specification. After that, a design specification has been worked out based on the requirement specification. The two specifications have served as a basis for the development of the DRFM circuit. One of the requirements on the design was that the circuit should be able to communicate through an external Ethernet interface. A part of the work has, thus, been to review available external Ethernet modules on the market. The result is a DRFM design that has been tested through simulations. The tests shows that the design works as described in the design specification.

Switched Ethernet is an Ethernet LAN that uses switches to connect individual nodes. This is popular because of its effective and convenient way of extending the bandwidth of existing Ethernets. Switched Ethernet is being considered by the industry community because of its open standardization, cost effectiveness, and the support for higher data rates up to 10Gbps. Even though many special-purposed solutions were proposed to support time constrained communication over Switched Ethernet, still there were some doubts about the real time handling capability of Switched Ethernet. To achieve reliable transmission guarantees for real time traffic over Switched Ethernet, it is important to measure the performance of Switched Ethernet networks for real time communication. In this thesis work we have observed the average end-to-end packet delay for real time traffic over a Switched Ethernet by simulation, which is very much essential for real time communication in industrial applications, where the communication is time-deterministic. In our thesis we used FCFS priority queuing in both the source nodes and switch. In this thesis we also discussed about the feasibility analysis for fixed sized frames and some traffic handling methods. We used 100mbp/s single full duplex Ethernet switch for our simulation. Finally simulation analysis and simulation results are discussed. Our purpose of simulation of Switched Ethernet networks is of good importance for the real time industrial applications.

In this age, the internet has becoming more and more popular recently. How to manage and organize the network effectively is a very important issue.Therefore, the technology of VPN was born. Through the VPN, we can manage and organize the local netork which spread everywhere effectively.But the tunneling technology which VPN used has a security problem. If we also change the VPN¡¦s port number, it will have a big dangerous security problem. In this paper, we will analyze some basic technology of VPN, and introduce how to modify the VPN. Let VPN have ability to pass through the firewall. This problem will make the people who managed whole network or firewall hard to control and manage it. Another, this paper will bring up the solution which can solve the security problem effectively. The key of network security problem is to use another protocol¡¦s port number. The solution in this paper will through solve this problem, so hacks can¡¦t modify the TCP port number such as HTTP Port 80 at will. Our solution is to implement a packet filter which is based on ethernet device driver.We use the RFC document which are defined by IETF to make the packet check rule. This packet filter can reject the illegal packet and make sure the network is safe.

The aim of this thesis is to develop a network, whose nodes communicate with the ZigBee wireless network protocol, and control this network with a PC through the Internet. One of the nodes of this network is designed to be master node. The other nodes are slave nodes. The master node can be connected to an Ethernet connected to the Internet. A PC can communicate with the master node via a specific web application over the Internet. The communication between a web server, in which the specific web application is loaded, and the master node is performed using a specific application protocol working over TCP/IP and defined in this thesis. The master node controls the slave nodes of the wireless network formed according to the commands given by the user of a PC over the Internet. The master node contains an implementation of the ZigBee stack along with a suitable application software to communicate with the slave nodes. The master node also contains an implementation of the TCP/IP stack along with a suitable application software to communicate with a web server in which the specific web application is loaded. The slave nodes contain an implementation of the ZigBee stack along with a suitable application software to communicate with the master node. For each type of node, appropriate hardware which is compliant with the software contained by that type of node is used. Each type of node uses microcontroller-based hardware.

Fast paced improvement of Ethernet technology has also received attention in the industry field like it did in other fields and ways of usage have started to be studied. As it is understood that the standard Ethernet protocols cannot be used due to the unsatisfied real time requirements, industrial and academic researchers have started to develop solutions to overcome this deficiency. In this thesis, the real hardware adaptations of Real Time Ethernet and RTXX protocol algorithms are implemented and their behaviors on the hardware are observed. Each parameter that affects the system&rsquo / s real time behavior is individually examined and the solution proposals are discussed.

Dynamic Distributed Dependable Real-time Industrial communication Protocol family (D3RIP), has been proposed in the literature considering the periodic or event-based traffic characteristics of the industrial communication networks. D3RIP framework consists of two protocol families: Interface Layer (IL) protocol family, which is responsible for providing the accurate time-division multiple access (TDMA) on top of a shared-medium broadcast channel, and Coordination Layer (CL), which is defined to fulfill the external requirements of IL. In this thesis, the hardware adaptations of the two protocols, Real-time Access Interface Layer (RAIL) and Time-slotted Interface Layer (TSIL), of the IL protocol family, are implemented. Their performance on both personal computers (PC) and development kits (DK) are observed.

Currently automation components of large-scale industrial systems are realized with distributed controller devices that use local sensor/actuator events and exchange shared events with communication networks. Fast paced improvement of Ethernet provoked its usage in industrial communication networks. The incompatibility of standard Ethernet protocol with the real-time requirements encouraged industry and academic researchers to provide a resolution for this problem. However, the existing solutions in the literature suggest a static bandwidth allocation for each controller device which usually leads to an inefficient bandwidth use.Dynamic Distributed Dependable Real-time Industrial Communication Protocol (D3RIP) family dynamically updates the necessary bandwidth allocation according to the messages generated by the control application. D3RIP is composed of two protocols / interface layer that provides time-slotted access to the shared medium based on an accurate clock synchronization of the distributed controller devices and coordination layer that decides the ownership of real-time slots. In this thesis, coordination layer protocol of D3RIP family and the IEEE 1588 time synchronization protocol is implemented and tested on the real hardware system that resembles a factory plant floor. In the end, we constructed a system that runs an instance of D3RIP family with 3ms time-slots that guarantees 6.6ms latency for the real-time packets of control application. The results proved that our implementation may be used in distributed controller realizations and encouraged us to further improve the timing constraints.

In this paper, we will provide an example of SoC for Information Appliance. We will use the SoC to reduce design-time and design-cost for IA products. Simultaneously, we will also enhance the Gigabit Ethernet Media- Access-Controller (MAC) with Hardware TCP/IP Checksum module. It can alleviate the CPU loads effectively, especially in longer length packets.