The IEEE 802.16(d) mesh coordinated distributed scheduling (CDS) mode is a novel technology for future fixed wireless backbone networks and designed for the use of omnidirectional antennas. The use of Single-Switched-Beam Antennas (SSBAs) may have great potential to increase network capacity due to the antenna directivity. However, a network designed for omnidirectional antennas usually cannot ...

In this paper we investigate the performance of dynamic alternate routing with trunk reservation for multirate switched networks. As the considered system shows the property of irreversible Markov chain, it is almost impossible to calculate the exact solutions for a network of practical size due to the calculation complexity. Therefore we slightly modify the conventional Kaufman’s recursive met...

Distributed sensor networks make extensive use of a common time reference. In this work we address the problem of time dissemination in a packet switched network when the nodes are NOT generally all connected to an accurate, external time reference source. We thoroughly analyze Network Time Protocol version 3 and identify its oversimplified clock modeling and its neglect of network delay varian...

We present a novel switched full-duplex LAN architecture which can greatly simplify the cabling requirements in areas that must support high port densities and/or are subject to frequent changes. Instead of providing a separate cable to connect each host to a dedicated port on a monolithic switch behind the wall, we emulate the shared bus topology from the early days of Ethernet by daisy-chaini...

Optical switching will enable core Internet packet switching to scale with future transmission rate increases. Currently proposed optical ATM switches do not allow packet reassembly, which is necessary for packet level forwarding. This results in the requirement to create end to end ATM virtual connections for flows even if they contain only one packet. In electronically switched networks MPOA ...

In this paper we compare characteristics of different FIFO packet switch types. In accordance with our expectations, the best results are obtained by using the output-queued packet switches. The main drawback of these switches is the need for a fast switching fabric. This can be avoided by using the input-queued packet switches, whose performance depends upon individual packet sizes. Characteri...

The ext Generation etwork is a future based network providing next generation services such as IPTV, Online gaming, Video on demand etc, based on IP protocol in the presence of core network. This research based Paper discusses the architecture of ext Generation etwork, its challenges & solutions, its reliability and its pros & cons. The main objective is to investigate the effectiveness of G pr...

A dynamic window model is developed which provides admission control for circuit switched networks through the signalling network. This model incorporates distributed processing while achieving desired global congestion control effects. It reflects the interaction between the circuit switched path in the telephone network and the packet switched path in the signalling network. The model is solv...

In this paper, we study the problem of verifying dynamic coverage in mobile sensor networks using certain switched linear systems. These switched systems describe the flow of discrete differential forms on time-evolving simplicial complexes. The simplicial complexes model the connectivity of agents in the network, and the homology groups of the simplicial complexes provides information about th...

The Man-in-the-Middle (MiM ) attack is used by attackers to perform sniffing activities in switched LAN networks. The potential damage to a network from sniffing activities can be very significant. This paper proposes a mechanism for detecting malicious hosts performing MiM attack in switched LAN networks. The proposed mechanism consists of sending trap and spoofed packets to the network’s host...