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...

The wireless LAN(Wi-Fi) infrastructure is widely used and many location-aware systems and services are researched. In this paper, wireless LAN based indoor positioning system WiPS is proposed. WiPS uses wireless LAN technology to measure the location of each mobile terminal. Mobile terminals equip only wireless LAN device to communicate and measure its location, so it can be made without any ad...

The IEEE 802.3 and 802.11 standards are used to define CSMA/CD (Carrier Sense Multiple Access with Collision Detection) based on the Ethernet LAN (Local Area Networks) and Wireless LAN (WLAN) protocol, respectively. This report deals with the comparison of IEEE 802.3 and IEEE802.11 MAC protocol in terms of the physical and medium access control (MAC) layer. CSMA/CD Ethernet-based protocol is th...

The General Packet Radio Service (GPRS) is widely deployed in second and third generation mobile cellular networks. Special benefits of GPRS are mobility management as well as support of authentication, authorization, and accounting (AAA). However, the data rates of GPRS are low and the price is high, compared to wired networks or Wireless LAN. Furthermore, Wireless LAN hotspots are starting to...

This memo describes a framework for supporting IETF Integrated Services on shared and switched LAN infrastructure. It includes background material on the capabilities of IEEE 802 like networks with regard to parameters that affect Integrated Services such as access latency, delay variation and queuing support in LAN switches. It discusses aspects of IETF’s Integrated Services model that cannot ...

This memo describes a framework for supporting IETF Integrated Services on shared and switched LAN infrastructure. It includes background material on the capabilities of IEEE 802 like networks with regard to parameters that affect Integrated Services such as access latency, delay variation and queuing support in LAN switches. It discusses aspects of IETF’s Integrated Services model that cannot ...

To allow a seamless integration between wireless LANs and Wireless WANs, we developed a full stack adaptation model and a simple subnet architecture that superimposes Mobile-IP on cellular-type wireless LANs. The idea is to use Mobile IP as an integrative layer atop different LAN/WAN networks. While Mobile-IP is widely used in wireless WANs, it is not known how well it performs under a wireless...

In this paper we present a study characterizing VLAN usage in a large-sized campus network. Despite their extensive prevalence in enterprise and campus networks, the usage of VLANs has received little systematic treatment in the research community. Our study is conducted using a whitebox approach, involving data such as router configuration files obtained from network operators, and through ite...

This paper presents the architecture of a software system able to assess the cognitive effort of a driver by monitoring the interaction between the driver and the steering wheel; this system is called WL Manager (WLM). The advantage of a Workload Manager System based on the steering dynamic is that of being not invasive in comparison to other workload measures, in particular physiological (hear...