Packet Delay
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. ANALYTICAL COMPARISON OF THE PERFORMANCE OF ADAPTIVE MODULATION AND CODING IN WIRELESS NETWORK UNDER RAYLEIGH FADING
Abstract In this paper, an analytic comparison between adaptive modulation (AdM) and adaptive Forward Error Correction (AdFEC) in wireless network telecommunication systems is performed. Through the Gilbert-Elliott model's, the Packet Error Rate (PER) is calculated and both the throughput and the delay, for different modulations and error correction capacity
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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2. New strategies for planning and performance evaluation of wireless networks: case studies based on the cross-layer approach
The use of wireless local area networks, called WLANs, as well as the proliferation of the use of multimedia applications have grown rapidly in recent years. Some factors affect the quality of service (QoS) received by the user and interference is one of them. This work presents strategies for planning and performance evaluation through an empirical study of
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-06
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3. An efficient routing scheme to reduce packet loss in all optical networks
Optical burst switching (OBS) is a promising technology for the next generation optical Internet. A buffer-less OBS network can be implemented using ordinary optical communication equipment without the need for either wavelength converters or optical memories. However, OBS networks suffer from a relatively high blocking probability, a primary metric of inter
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2010-12
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4. Análise da associação dos protocolos de roteamento AODV e DSR com o algoritmo Gossip, sistema de Quorum e com um novo algoritmo de economia de energia, PWSave. / Association analisys of the routing protocols AODV and DSR with Gossip, Quorum system and a new algorithm, PWSave.
This work studies the implementation of the Quorum system associated with the Gossip algorithm, the implementation of a new power saving algorithm - the PWSave - and the routing protocol AODV in a scenario with and without failures of an ad hoc network with mobility. It has been chosen to implement this work in an environment of simulation, because the mathe
Publicado em: 2009
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5. O processo produtivo capitalista na agricultura e a introdução dos organismos geneticamente modificados : o caso da cultura da soja Roundup Ready (RR) no Brasil
This study brings to light the question of the introduction of genetically modified organisms (GMOs) in Brazilian agriculture, particularly soybean production. The text discusses how changes in intellectual property rights could permit the capitalistic appropriation of large amounts of socially generated plus-value in agricultural sector, and of nature too,
Publicado em: 2009
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6. Eficiencia de informação agregada e atraso de pacote em redes ad hoc sem fio / Aggregate information efficiency and packet delay in wireless ad hoc networks
The inherent characteristics of ad hoc networks such as the lack of infrastructure and the possibility of multi-hop links require performance measures that capture the relationships between physical layer, medium access control and link layer. Based on aggregate information efficiency metric and packet delay, trade-offs involving several networks variables a
Publicado em: 2008
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7. Ambiente para otimização de redes multimídia utilizando algoritmo genético
The objective of this work is to develop computational tools to create an environment that permits to search for optimal topologies to interconnect multimedia network nodes. The searching process uses links parameters, based on the amount of transported traffic and also reliability, cost and distance between nodes. The optimal topology is the one that fulfil
Publicado em: 2008
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8. Voice packet delay evaluation in an IP network using voice stream multiplexing scheme / Analise de atraso dos pacotes de voz em redes IP utilizando a tecnica de multiplexagem de quadros de voz
Neste estudo são avaliados o desempenho e o impacto do tráfego de voz em uma rede IP. Na rede IP o sinal de voz é transmitido através de pacotes que são identificados por um conjunto de cabeçalhos. Cada pacote de voz tem a carga útil, composta por um quadro (frame) de voz, muito menor que a carga útil de um pacote de dados. Desta forma, a rede IP pod
Publicado em: 2008
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9. CUICA - uma ferramenta para suportar a convergência da TV digital com a WEB através da criação de conteúdo digital
A collaborative virtual environment can be dened as a single virtual reality space hared by multiple participants connected from diferent hosts. However, most collaborative existing systems restrict the communication among the participants to text messages or audio communication. The natural means of human communication are richer than this. Other efects of
Publicado em: 2007
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10. Estratégias de gerenciamento de banda IP/MPLS para o transporte eficiente de serviços integrados
To use the network resources in the optimal efficiency one possibility is apply resource management policies that can be flexible and feasible as much as the time period can be. The converged networks are expected to deliver audio and video transmissions with quality as good as that of a circuit switching network. In order to make it possible, the network mu
Publicado em: 2007
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11. Wavelet-packet identification of dynamic systems in frequency subbands.
This work presents a technique for linear system identification in frequency subbands by using wavelet packets. The wavelet-packet decomposition tree is used to establish frequency bands where subband models are created. An algorithm is proposed to adjust the tree structure, in order to achieve a compromise between accuracy and parsimony of the model. In a s
Publicado em: 2005
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12. Contention resolution using delay lines in asynchronous packet switched optical networks / Resolução de contenção por meio de linhas de atraso em redes opticas assincronas comutadas por pacote
A combinação da comutação óptica de pacotes com a multiplexação por divisão de comprimento de onda (WDM) surge como um cenário promissor para as redes ópticas futuras. Um dos requisitos de projeto dessas redes é procurar minimizar a perda de pacotes quando há contendas pelos mesmos recursos. Uma alternativa é a utilização de armazenadores de p
Publicado em: 2004