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.
Contact Graph Routing is a routing scheme for Delay-and Disruption-Tolerant Networks (DTNs) that is designed particularly for use in highly deterministic space networks. The Endpoint Discovery Protocol is designed for use in terrestrial DTNs where opportunistic contacts are common. We outline two scenarios where use of both of these protocols could be desirable and analyse the current versions to...
Intermittent connectivity is common in certain wireless access networks. Existing network protocols are not resilient to disruption of communication links and communication often fails when faced with sporadic connectivity. Thus in recent years there is a growing interest in Intermittently Connected Mobile Networks (also know as Mobile Opportunistic Networks) and many routing protocols have been proposed...
P2P SIP (peer to peer session initiation protocol) systems have emerged as a new trend in multimedia realm due to their abilities to overcome the shortcomings of conventional SIP systems. Most of P2P SIP systems were implemented using Chord, a Distributed Hash Table (DHT) based routing algorithm which can provide scalability and reliability. Previous studies on P2P SIP systems did not address node...
Due to the limited energy supplies of nodes in wireless networks, achieving energy efficiency is crucial for extending the lifetime of these networks. Thus, we study efficient power allocations and transmission protocols for outage-restricted multihop wireless networks based on cooperative transmission. In such multihop networks, a number of nodes, acting as relays, can assist a source node in the...
Recent technological advances in miniaturization and wireless communication have made Wireless Sensor Networks an active research field. The increasing number of multimedia and real-time applications for Wireless Sensor Networks has led to a growing interest in Quality of Service for this category of networks. In this paper, we propose a QoS-geographic and energy aware routing protocol for Wireless...
A Mobile Ad hoc Network (MANET) is a collection of wireless mobile terminals that are able to dynamically form a temporary network without any aid from fixed infrastructure or centralized administration. In recent years, MANETs are continuing to attract the attention for their potential use in several fields such as military activities, rescue operations and time-critical applications. In this paper,...
Ad-hoc Networks have been proposed for a variety of applications where support for real time, multimedia services may be necessary. In order to operate ad hoc networks several protocols, for media access control, power control, routing, and transport are needed. We take a holistic approach to the problems in ad hoc networks. We start by postulating general design principles for power control based...
To solve the collaboration issues between wireless Ad Hoc networks and Overlay Network, an Ad Hoc overlay network model was presented and a Key-based Indexing Mechanism (KIM) was proposed accordingly, based on the distributed algorithm of Overlay Network and mobile node local routing algorithm. The mechanism combines protocol of Overlay Network in Logical namespace with routing protocol of mobile...
Routing is one of the most challenging open problems in Vehicular Ad hoc NETworks (VANETs) because of the short-lived wireless connectivity environment. Store-carry-and-forward approach using buses on regular routes is considered as one of the most promising emerging routing policy that can significantly improve delivery performance and reliability in VANETs. While none of existing solutions considers...
In the existing clustering protocol, cluster heads (CHs) usually transmit data to Sink directly with long-distance transmission and huge energy consumption. To solve this problem, an inter-cluster gateway-based energy-efficient routing protocol (IGER) is proposed in this paper. It makes cluster heads evenly distributed, chooses appropriate nodes to be gateways for inter-cluster communication to share...
Wireless multimedia sensor networks (WMSNs) are expected to find wide applicability in target tracking in the near future. This paper proposes a dynamic capacity multi-path routing protocol (DCM), based on improved Ford-Fulkerson algorithm, to solve the problem of data transmission from anchor nodes to base station (BS). By adjusting the parameter of flow capacity in max-flow model, a multi-path routing...
Recently, opportunistic routing has gained much popularity for the ability to exploit the broadcast nature of the wireless medium with several practical protocols been proposed over wireless mesh networks (WMNs). These protocols usually add many mechanisms to introduce a dramatic increase in the overall network throughput, such as reliability promise and rate control. However, the evaluation of these...
Delay and Tolerant Networks (DTNs) have been proposed to address data communication challenges in network scenarios, where no instantaneous end-to-end path is guaranteed because of frequent and long duration network partitions. Typical protocols forward a message to multiple nodes to improve message delivery rate. However, a large number of replications consume many system resources that are quite...
Micromobility protocols have been proposed to provide seamless local mobility support. There are several micro mobility protocols such as HMIP, Cellular IP and HAWAII. This paper focuses on the performance of single stream forwarding scheme of HAWAII . An analytical model is developed for the evaluation. The aim of the paper is to investigate the impact of the buffering at the old base station on...
Since the nodes in wireless sensor networks operate on limited power, it is an important issue to design efficient data gathering scheme that can save energy while meeting the needs of application. In this paper, we propose an energy-efficient cluster-based data gathering protocol (ECDGP). ECDGP uses a new clustering algorithm based on belief degree for clusterhead election. Furthermore, ECDGP selects...
Invalid BGP route always occurs in the Internet, which might lead to serious network evident and also increase routing load by generating unnecessary BGP updates. This paper presented a simple and easily deployable approach for detecting invalid BGP routes. The method discovers invalid prefixes through checking the allocation record and the ownership of the prefixes of inbound routes and outbound...
LEACH is one classical protocol in wireless sensor network, which is a clustering-based protocol with good performance. In this paper, an improved routing algorithm based on LEACH protocol will be proposed, which involves cluster head choosing, multi-hop routing and the building of its path. Simulation in MATLAB, an improved routing algorithm has higher energy utilizing rate, and it helps prolong...
In this paper, we propose an Event-Driven wireless Sensor Network Multi-Path routing protocol (EDWSNMP), which includes three parts: multi-path creation, data communication and route maintenance. In multi-path creation part, a Heuristic Local Gabriel Graph (HLGG) algorithm is proposed to do topology control. In data communication part, cluster header collects data of other nodes in the cluster and...
This paper investigates the routing protocols for randomly distributed wireless sensor networks (WSNs). A learning algorithm is proposed for computing the path on routing, and only few information of adjacent nodes is necessary. By using the depth first search strategy, and remembering the historical experience of path on routing, we can find next node, which illustrates the advantage of combination...
This paper provides a qualitative analysis of cross-layer approaches in wireless sensor networks. It begins by presenting two approaches in cross-layer design. The first one focuses on the existence of an auxiliary communication link between the layers - here the OSI layered-approach is being implied - in order to support the exchange of information which is useful for adaptation. The approach itself...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.