IIIE 20352
INSTITUTO DE INVESTIGACIONES EN INGENIERIA ELECTRICA "ALFREDO DESAGES"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A Free-Collision MAC Proposal for 802.11 Networks
Autor/es:
ALIMENTI, OMAR; FRIEDRICH GUILLERMO; REGGIANI, GUILLERMO
Lugar:
Gramado
Reunión:
Workshop; 28th Brazilian Symposium on Computer Networks and Distributed Systems; 2010
Institución organizadora:
Brazilian Symposium on Computer Networks and Distributed Systems
Resumen:
Wireless technologies are a good choice for work in industrial
environments, where it is necessary to interconnect mobile systems or it wants
to avoid sensors and controllers wiring in plant. However, these technologies
present reliability and timing problems inherent in the radio channels,
mechanisms for medium access, etc. The standard 802.11e provides two
alternatives for medium access (EDCA and HCCA) by differentiating traffic
into four Access Categories (ACs). This paper proposes a mechanism for
controlling the medium access, so-called WRTMAC, developed from the
EDCA scheme of standard 802.11e. The handling of the arbitration inter
frame spaces (AIFS) has been modified in order to make deterministic the
medium access, even in terms of high traffic next to the saturation of the
system.
