IIIE   20352
INSTITUTO DE INVESTIGACIONES EN INGENIERIA ELECTRICA "ALFREDO DESAGES"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Evaluación de una Variante de Control de Acceso al Medio Inalámbrico para Tiempo Real Basada en 802.11e
Autor/es:
FRIEDRICH GUILLERMO; ALIMENTI, OMAR; REGGIANI, GUILLERMO; MAIDANA FEDERICO; TONIETTI SANTIAGO; GOMEZ DE MARCO DAMIÁN
Lugar:
Buenos Aires
Reunión:
Conferencia; XVI Congreso Argentino de Ciencias de la Computación - CACIC 2010; 2010
Institución organizadora:
CACIC
Resumen:
Wireless technologies are a good choice for work in industrialenvironments, where it is necessary to interconnect mobile systems or it iswanted to avoid sensors and controllers wiring. However, these technologiespresent reliability and timing problems inherent to radio channels, mediumaccess mechanisms, etc. The standard 802.11e provides two types of mediumaccess (EDCA and HCCA) by differentiating traffic into four AccessCategories (ACs). This paper proposes a mechanism for medium access control,so-called WRTMAC (Wireless Real Time Medium Access Control), developedfrom the EDCA scheme of 802.11e and an optimization method using priorityclasses. The handling of the arbitration inter frame spaces (AIFS) has beenmodified in order to make deterministic the medium access. This provides afree-collision MAC mechanism in a wireless environment. Also, it is presenteda comparative between WRTMAC and EDCA, simulated in ns-2.