Network topology significantly affects the system performance of local area networks. The bus topology was considered for optical local area networks since the degradation of system performance due to propagation delay could be reduced. Power budget constraints severely limited maximum system size which diminished its appeal. On the other hand, the star topology was shown to have excellent fano...

With the rapid advance of mobile computing, high speed Wireless Local Area Networks (LAN) attracts a lot of research interests in recent years. A new international stander IEEE 802. 11 on wireless LAN has been established. Its physical transmission is realized by either spread spectrum communication or non-directive infrared. The medium access control of IEEE 802. 11 is using carrier sense mult...

In light of advances in processor and networking technology, especially the emergenceof network attached disks, the traditional clientserver architecture of file systems has become suboptimal for many computation/data intensive applications. In this paper, we introduce a revised architecture for file management employing network attached storage: the dynamic file server environment (Dynamo). Dy...

Wireless Communication is an application of science and technology that has come to be vital for modern existence. From the early radio and telephone to current devices such as mobile phones and laptops, accessing the global network has become the most essential and indispensable part of our lifestyle. Wireless communication is an ever developing field, and the future holds many possibilities i...

The edge of the Internet is increasingly becoming wireless. Understanding the wireless edge is therefore important for understanding the performance and security aspects of the Internet experience. This need is especially necessary for enterprise-wide wireless localarea networks (WLANs) as organizations increasingly depend on WLANs for missioncritical tasks. To study a live production WLAN, esp...

In this paper, we report on the field measurements of the signal strength received at the user end from an access point in a given wireless local area network. The network established for Internet access in indoor environment is based on IEEE802.11g standard operating at 2.4 GHz license-exempt band. Signal strength measurements were recorded at two slightly different positions of the user equip...

OBJECTIVES The purpose of this study was to develop a prototype wireless local area network (LAN)-based tracking system and evaluate its efficacy. METHODS A wireless LAN-based tracking system was developed with a personal digital assistant (PDA) having a simple text messaging function and a prototype stand-alone tracking device. Evaluation of the effectiveness of the tracking system was perfo...

Weuse the technique of storing the data of a single object across several storage servers, called data striping, to achieve high transfer data rates in a local area network. Using parallel paths to data allows a client to transfer data to and from storage at a higher rate than that supported by a single storage server. We have implemented a network data service, called Swift, that uses data str...

Multiserver LANs, that offer many categories of services with absolute priority discipline, are investigated. The flows of user requests to servers are considered Poissonian. The optimization problem for LAN server set configuration is formulated; the goal is to minimize costs with servers, without exceeding the established mean response time for all users’ requests of different categories. Ana...

Markov localization has been successfully deployed in robotics using highly precise distance sensors to determine the location and pose of mobile robots. In this setting the scheme has shown to be robust and highly accurate. This paper shows how this approach has been adapted to the problem of locating wireless LAN clients in indoor environments using highly fluctuating radio signal strength me...