Redes WPAN : análisis y mejoras aplicadas a sistemas embebidos
Nowadays data networks occupy an important place in our world. Since the 70, data communications have evolved quickly, and data transmission, voice and video may be transmitted over different media (copper, fiber optic and wireless). For example we can mention video-conference, voice and IP telephon...
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| Formato: | Online |
| Idioma: | spa |
| Publicado: |
2010
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| Acceso en línea: | http://repositoriodigital.uns.edu.ar/handle/123456789/2107 |
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| Sumario: | Nowadays data networks occupy an important place in our world. Since the 70, data communications have evolved quickly, and data transmission, voice and video may be transmitted over different media (copper, fiber optic and wireless). For example we can mention video-conference, voice and IP telephony, electronic transactions, medical applications, industrial sensor networks, etc. These applications are carried out successfully through data communications protocols. Protocol is a set of rules and conventions that govern how network devices exchange information. The protocols analysis lets optimize network performance. The study and analysis of wireless personal area networks (WPAN) are developed in this thesis. The application fields include industrial monitoring and control, public safety, measured in vehicles, smart cards or boards, precision agriculture, among others. WPANs are suitable for use in small mobile devices such as sensors, cell phones, Personal Digital Assistants (PDAs), etc. The Institute of Electrical and Electronics Engineers (IEEE) specifies the rules for this type of networks under the IEEE 802.15.x. It have different subgroups: 802.15.1 specifications based on the Special Interest Group (SIG) Bluetooth. 802.15.2 developed a model of coexistence between networks Wireless LAN (Wireless Local Area Networks) and WPANs 803.15.3 transmission delivers high speed, low power consumption, low cost and quality of service. 802.15.4 researches and develops solutions that require low data transmission and thus the batteries lasting for months or even years. This thesis presents the development of proposals to improve the network performance over different real-time scheduling disciplines. First this thesis describes the standard 802.15.3, and then the real-time scheduling algorithms are explained. Then, several variants at MAC level are developed in order improve the real-time WPAN performance. |
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