Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
In this paper, we develop and study a model to identify cost optimized Multi-Path Entity (MPE) locations in the context of hybrid fixed and mobile access for a large German telecom operator. We consider the operator's network architecture as well as the related cost components including network elements and nodes. The objective is to support future network planning with a techno-economic sensitivity...
Optical code-division multiplexing (OCDM) over wavelength-division multiplexing network technology is of interest for all-optical networks because it has many channels and can create a secure network. However, OCDM networks experience a cycle-attack problem due to multi-access interference propagation; if the problem occurs, all transferred signals cannot be decoded. To avoid this problem, the OCDM...
The Hierarchical Optimized Link State Routing (HOLSR) protocol was designed to improve scalability of heterogeneous Mobile Ad-Hoc Networks (MANETs). HOLSR is derived from the OLSR protocol and implements Multipoint Relay (MPR) nodes as a flooding mechanism for distributing control information. Unlike OLSR, nodes are organized in clusters and implement Hierarchical Topology Control (HTC) messages for...
In this paper a theoretical and experimental analysis of the time-domain properties of the Power Line Communication (PLC) channel on-board a cruise ship is presented. It is shown that a typical feature of the topology of this kind of naval power networks strongly reduces the time variation of the transfer function for broadband PLC. In particular the topology uses a star configuration, and each electrical...
Wireless sensor networks (WSNs) detect and monitor the outside physical state by the sensor nodes organizing automatically. Clustering is a standard approach for achieving efficient and scalable performance in WSNs. In the applications of analysis topology discovering, geography routing, tracking and so forth, we need to resolve how to search for the boundary nodes and form the network boundary. Different...
Peer-to-peer (P2P) network topology measurement is the foundation for research of p2p network sharing behavior pattern and network resources dynamic distribution. To BitTorrent (BT) network, we present an active measurement method of network topology. Firstly, using seed crawler get entire BT network's seeds, then through analyzing every seed to get tracker servers' information, after that, BT crawler...
With new optical transport systems able to provide sub-wavelength granularity, the dynamic characteristics of the network are expected to strongly increase. Furthermore, such properties are highly related to the underlying physical network topology, which in turn require from the control plane important features such as scalability, dynamism and automatism. In this paper we analyze the properties...
Wireless sensor networks (WSNs) are frameworks for modern pervasive computing infrastructures, and are often subject to operational difficulties, such as the inability to effectively mitigate signal noise or sensor failure. Natural systems, such as gene regulatory networks (GRNs), participate in similar information transport and are often subject to similar operational disruptions (noise, damage,...
In a distributed system, when the coordinator is not functioning, the system needs to elect a new coordinator to enable the active node to perform useful tasks. In this paper, a bi-directional election algorithm based on ring topology was brought forward after we analyzed a classical distributed election algorithm. The new algorithm could quickly elect the coordinator by sending messages in parallel...
How to measure and maintain connectivity is an important issue in ad hoc networks. A special case of such network is Wireless Sensor Networks (WSN), which are often deployed in harsh environments and also susceptible to a number of problems that may negatively affect the connectivity among the nodes. An additional factor that increases the cost of connectivity maintenance in ad hoc networks is when...
The paper presents the comparative study and analysis of buffering in Goback2 network. The performance at the destination node by applying different buffering capacities at the routers is demonstrated. The results using NS2 simulator are produced. It can be concluded that the selection of appropriate type of buffering helps in controlling the congestion and the packet drops at the link node.
Combining LEO satellite's advantage on transmitting real-time information with GEO satellite's big computing ability, this paper proposes a Snap-based Autonomous Routing Algorithm for GEO_LEO satellite networks. The algorithm utilizes the connectivity rules of inter satellite link to partition network' topology and compute the routing table. GEO satellites can recount routing table for failure region...
An efficient logical topology helps wireless sensor networks (WSNs) minimizing different constraints. For large-scale WSNs, chain oriented logical topologies are shown to be more energy conservative than other logical topologies. Chain construction is the main challenge to create a chain oriented logical topology. In this paper, we propose a chain construction scheme, which creates several chains...
In this paper, we study the performance of the Greedy Perimeter Stateless Routing (GPSR) [1] and the Greedy Routing for Maximum Lifetime (GRMax)[2] which is our proposal, in wireless sensor networks in random topology and grid topology wireless sensor network. We decide to compare the performance of GPSR and GRMax in different topology of networks using the same simulation environment. Evaluation...
In today's cellular networks, it becomes harder to provide the resources for the increasing and fluctuating traffic demand exactly in the place and at the time where and when they are needed. Moreover, a cellular network which can cover indoor areas and hot-spots is a complicated and expensive task. Therefore, a new hierarchical topology is put forward to solve the problem, and the topology have application...
In performance studies of vehicular ad hoc networks, intelligent simulation tools like NS-2 plays an important role. Since Tcl scripts are widely used, we have implemented a new tool which is MyTool for generating Tcl scripts file. In this work, we introduce the specific characteristics of MyTool and discuss its features compared with NSG2 (NS-2 Scenarios Generator 2). In later section, we illustrate...
Topology inference of end to end measurement overcomes the drawbacks of traditional algorithm that needs cooperation of internal node in network, And does not incur any additional burden on the network. Scholars show interests in Research Area in recent years. This paper analyzes recent new arithmetic Based on end to end date for wireless sensor networks, sums up the characteristics and the appropriate...
An accurate model of network topology is the fundamental to design a new network protocol. Recent efforts have been made to produce many topologies for the Internet, but few can give attention the power-law distribution characteristic in each tier of the Internet. We propose Leetar, a new Internet topology generator, which can generate topologies that contains many tiers and each tier match the power-law...
The current progress of network technique and the complication of network structure make administrators must spend more time and mind to maintain the system and the network under normal operation. With continuously increasing dependence on the network, it seems to be a knotty matter to know how to effectively manage all equipments on the network and to make sure they whether run it rightly or not...
Based on the territorial continuity of IP addresses, this paper proposes an enhanced Boot-Trapping algorithm. It constructs a Patricia Tree which reflects the topology of the physical network, and collects information of the online Ultra Peers. By providing an UltraPeer physical network nearby for a LeafPeer, it can improve the proximity between the overlay network and the physical network, the aggregation...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.