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{\title Um Framework para Difus\'e3o Eficiente de Interesses em Redes Veiculares Orientadas a Conte\'fado}{\author Adriano}{\operator PG}{\creatim\yr2014\mo9\dy23\hr11\min2}{\revtim\yr2014\mo9\dy23\hr11\min2}{\version2}{\edmins1}{\nofpages1}{\nofwords372}
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\af1\afs28 \ltrch\fcs0 \f1\fs28\insrsid11600093\charrsid16547510  para Difus\'e3o Eficiente de Interesses em Redes Veiculares Orientadas a Conte\'fado
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\par Resumo
\par }{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 
\par Dentre os desafios para o desenvolvimento das redes veiculares e suas aplica\'e7\'f5es, destaca-se a concep\'e7\'e3o de protocolos eficientes para roteamento, dissemina\'e7\'e3o de informa\'e7\'f5es, ger\'eancia e configura\'e7\'e3
o da rede. Esses desafios s\'e3o consequ\'eancia das caracter\'edsticas singulares de mobilidade dos n\'f3s no ambiente veicular, que dificultam a atribui\'e7\'e3o de endere\'e7os e o c\'e1
lculo de rotas fim-a-fim entre os pares comunicantes. A arquitetura CCN destaca-se na literatura por prover um modelo de rede orientado a conte\'fados nomeados, onde a busca e a entrega de dados ocorre de forma independente \'e0 localiza\'e7\'e3
o ou identifica\'e7\'e3o dos n\'f3s envolvidos. Nesse modelo, os n\'f3s da rede s\'e3o dotados de }{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \i\f267\fs24\insrsid11600093\charrsid16547510 cache}{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 
, e a busca de conte\'fados \'e9 realizada a partir do envio de requisi\'e7\'f5es direcionadas ao pr\'f3prio nome do conte\'fado. Como qualquer n\'f3 da rede pode se comportar como fonte do conte\'fado, a partir da presen\'e7a do mesmo em }{\rtlch\fcs1 
\af267\afs24 \ltrch\fcs0 \i\f267\fs24\insrsid11600093\charrsid16547510 cache}{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 , n\'e3o \'e9 necess\'e1rio o uso de esquemas de endere\'e7amento para os n\'f3
s, nem o estabelecimento de rotas fim-a-fim entre as partes comunicantes em movimenta\'e7\'e3o. Dessa forma, a arquitetura CCN oferece muitas facilidades \'e0s redes altamente din\'e2micas, como suporte nativo \'e0 mobilidade, }{\rtlch\fcs1 \af267\afs24 
\ltrch\fcs0 \i\f267\fs24\insrsid11600093\charrsid16547510 multicasting}{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \f267\fs24\insrsid11600093  }{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 e a independ\'eancia de configura\'e7\'f5es pr\'e9
vias para obten\'e7\'e3o de conte\'fados. Entretanto, tamb\'e9m pode provocar o problema de }{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \i\f267\fs24\insrsid11600093\charrsid16547510 broadcast}{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \f267\fs24\insrsid11600093  }{
\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \i\f267\fs24\insrsid11600093\charrsid16547510 storm}{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \f267\fs24\insrsid11600093  }{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 
dos pacotes de interesse, inundando a rede com solicita\'e7\'f5es em busca dos conte\'fados desejados, comprometendo os recursos dispon\'edveis. Este trabalho prop\'f5e o GeoZone, um }{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 
\i\f267\fs24\insrsid11600093\charrsid16547510 framework}{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \f267\fs24\insrsid11600093  }{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 que explora os benef\'edcios da arqui
tetura CCN para as redes veiculares e que introduz mecanismos para a redu\'e7\'e3o do problema de inunda\'e7\'e3o de pacotes de interesse em redes veiculares orientadas a conte\'fado. O }{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 
\i\f267\fs24\insrsid11600093\charrsid16547510 framework}{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \f267\fs24\insrsid11600093  }{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 proposto \'e9 composto por (i) um esquema para nomea\'e7\'e3
o geo-referenciada de conte\'fados e transparente para aplica\'e7\'f5es veiculares e por (ii) um mecanismo de encaminhamento de pacotes de interesse, que define uma zona de dissemina\'e7\'e3o para reduzir a inunda\'e7\'e3o da rede. Simula\'e7\'f5
es em diferentes cen\'e1rios de mobilidade veicular s\'e3o realizadas para comparar a efici\'eancia do }{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 \i\f267\fs24\insrsid11600093\charrsid16547510 framework}{\rtlch\fcs1 \af267\afs24 \ltrch\fcs0 
\f267\fs24\insrsid11600093  }{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093 com outras propostas similares. Comparado a estas propostas, o GeoZone reduz em at\'e9 66% o n\'famero de pacotes de interesse transmitidos, sem preju\'ed
zo ao atraso e \'e0 taxa de entrega de conte\'fados.}{\rtlch\fcs1 \af266\afs24 \ltrch\fcs0 \f266\fs24\insrsid11600093\charrsid16547510 
\par }}