Enhanced Distributed Channel Access (Edca) - Proxim ORiNOCO AP-800 Installation And Management Manual

Device Configuration Using Web Interface

3.6.1 Enhanced Distributed Channel Access (EDCA)

EDCA is a prioritized Carrier Sense Multiple Access with Collision Avoidance (CSMA)/CA access mechanism used by the
clients/AP in a WME enabled BSS to realize different classes of differentiated Channel Access.
A wireless entity is defined as, all wireless clients and devices in the wireless medium contending for the common wireless
medium. EDCA uses a separate channel access function for each of the Access Categories (Index) within a wireless entity.
Each channel access function in a wireless entity contends for the wireless medium as if it were a separate client contending.
Different channel access functions in a given wireless entity contend among themselves for access to the wireless medium in
addition to contending with other clients.
STA EDCA Table and AP EDCA Table
This feature allows the user to configure the EDCA parameters for the client (Station) and the device. The EDCA parameter
set provides information needed by the client stations for proper QoS operation during the wireless contention period. These
parameters are used by the QoS enabled AP to establish policy, to change policies when accepting new stations or new
traffic, or to adapt to changes in the offered load. The EDCA parameters assign priorities to traffic types where higher priority
packets gain access to the wireless medium more frequently than lower priority packets.
: Default recommended values for EDCA parameters have been defined; Proxim recommends you not to modify EDCA
parameters unless strictly necessary.
To configure EDCA parameters for the AP and the Station, do the following:
1. Navigate to CONFIGURATION > QoS > EDCA. The QoS EDCA screen appears.
Figure 3-24 QoS EDCA
ORiNOCO® AP-800 and AP-8000 Installation and Management Guide 66