Wireless local area network planning: an overview

When planning a wireless local area network, there are design issues that need to be considered. In this paper, the fundamentals of planning a wireless local area network are introduced and discussed to highlight the requirements involved. Network constraints, as their relevance to wireless network design is investigated. The paper concludes with an overview of wireless network planning solutions including commercial and free software, and an introduction to the author’s research

Designing application software in wide area network settings

Progress in methodologies for developing robust local area network software has not been matched by similar results for wide area settings. The design of application software spanning multiple local area environments is examined. For important classes of applications, simple design techniques are presented that yield fault tolerant wide area programs. An implementation of these techniques as a set of tools for use within the ISIS system is described

Security Design for Wireless Local Area Network (WLAN)

Wireless networking is rising with the ever-increasing need for businesses to lower costs and support mobility of workers. Compared with wired networking, wireless capability offers more timeliness, affordability, and efficiency. When performing installations, there are many tangible cost savings with using less wire between the user's appliance and a server. However, most of the organization that decided to deploywireless network within their working environment often overlooked the security aspect of the deployed wireless LAN. Therefore, this will jeopardize the organization's safety in terms of network security and business trade secrets if their network is intruded by their rivals. This project concentrates on Wireless Local Area Network architecture and the security aspect of the designed network. Firstly, the project will emphasizes on researching about WLAN architecture. This is to ensure best practice method to be taken in designing the WLAN. It is then followed by extensive research to deploy better security to the designed network. However, the security aspect to be deployed is based on the needs and the architecture of the WLAN. The designed network is tested by conducting similar simulation at the lab which represents real - time performance and situation where the network architecture will be implemented and tested. For the time being, 802.IX / EAP ( Extensible Authentication Protocol ) is proven to be the best practice solution to secure any Wireless LAN implemented. Through the simulation, it will be proven that the proposed WLAN design is secure for implementation by any other interested parties

Design implementation and measurement of a collision avoidance multiple broadcast tree network

Packet collisions and their resolution create a performance bottleneck in random access LANs. Collision avoidance switches are a hardware solution to this problem [1, 2]. Collision avoidance switches allow the implementation of random access protocols without the penalty of collisions among packets.In this paper, we describe a design and implementation of a local area network architecture based on collision avoidance, called the Collision Avoidance Multiple Broadcast (CAMB) tree network. Our implementation follows the protocol layering architecture of the IEEE 802 local area networks, and includes CAMB tree switches, station/network interface boards, and support of transport protocols. We also present the performance measurements of our experimental CAMB tree network

Secure Distributed Dynamic State Estimation in Wide-Area Smart Grids

Smart grid is a large complex network with a myriad of vulnerabilities, usually operated in adversarial settings and regulated based on estimated system states. In this study, we propose a novel highly secure distributed dynamic state estimation mechanism for wide-area (multi-area) smart grids, composed of geographically separated subregions, each supervised by a local control center. We firstly propose a distributed state estimator assuming regular system operation, that achieves near-optimal performance based on the local Kalman filters and with the exchange of necessary information between local centers. To enhance the security, we further propose to (i) protect the network database and the network communication channels against attacks and data manipulations via a blockchain (BC)-based system design, where the BC operates on the peer-to-peer network of local centers, (ii) locally detect the measurement anomalies in real-time to eliminate their effects on the state estimation process, and (iii) detect misbehaving (hacked/faulty) local centers in real-time via a distributed trust management scheme over the network. We provide theoretical guarantees regarding the false alarm rates of the proposed detection schemes, where the false alarms can be easily controlled. Numerical studies illustrate that the proposed mechanism offers reliable state estimation under regular system operation, timely and accurate detection of anomalies, and good state recovery performance in case of anomalies

Design, implementation, and analysis of a wireless local area network

This thesis is intended to provide information which can be used for further implementation of wireless local area networks on the University of Tennessee campus. By simulating the system of choice and then doing actual field measurements, data was obtained which will simplify future implementation by providing the system designer with information that will minimize the need for further research. The properties of differential quaternary phase shift keying (DQPSK) and direct sequence spread spectrum (DS/SS) modulation are examined as well as multipath interference which greatly effects the performance of an indoor RF system. The protocols used by the wireless LAN system are described as is the procedure used to take performance measurements. Contained within this thesis is an amalgamation of ten months of research, programming, and analysis

RTnet: a real-time protocol for broadcast-capable networks

This paper presents an overview of a real-time network protocol, meant to be used on fully-connected local area networks with a broadcast capability. The intended use of this protocol is an in-home digital network, with support for on-the-fly addition and removal of network nodes, for resource-lavish and resource-lean devices, and for multimedia, command and control and regular data traffic. Both the design and the operation are presented, together with results from measurements on a prototype of the protocol on top of Ethernet

Advanced local area network concepts

Development of a good model of the data traffic requirements for Local Area Networks (LANs) onboard the Space Station is the driving problem in this work. A parameterized workload model is under development. An analysis contract has been started specifically to capture the distributed processing requirements for the Space Station and then to develop a top level model to simulate how various processing scenarios can handle the workload and what data communication patterns result. A summary of the Local Area Network Extendsible Simulator 2 Requirements Specification and excerpts from a grant report on the topological design of fiber optic local area networks with application to Expressnet are given

Design and implementation of interface units for high speed fiber optics local area networks and broadband integrated services digital networks

The design and implementation of interface units for high speed Fiber Optic Local Area Networks and Broadband Integrated Services Digital Networks are discussed. During the last years, a number of network adapters that are designed to support high speed communications have emerged. This approach to the design of a high speed network interface unit was to implement package processing functions in hardware, using VLSI technology. The VLSI hardware implementation of a buffer management unit, which is required in such architectures, is described

Provision of metro ethernet services using a reconfigurable photonic access network

The paper proposes a design for traffic engineering to provide Ethernet services using an extended access network. Ethernet has remained the dominant technology for Local Area and Enterprise Networks, the use of Ethernet in metro networks has seen significant interest of late to provide for end to end Ethernet services to the user. The Broadband Photonic (BBP) access network is viewed as a quasi independent stack of EPONs in which geographically spread customer-VLANs (C-VLANs) can be implemented. The use of such a network for providing metro Ethernet like services in addition to traditional access services is presented