Performance Analysis of Industrial WLAN Based on EDCA Scheme Defined in IEEE802.11e
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الملخص
In the last few years wireless local area network (WLAN) technology and products have grown
unusually. This growth has encouraged many researchers to employ WLAN technology in different
application Areas. Recently, using IEEE 802.11 WLAN in industrial automation applications is attractive
and more interesting. However, the currently used medium access mechanism makes WLANs nondeterministic
and hence not suitable for industrial real-time traffic. Legacy IEEE 802.11 WLANs were
initially designed for best effort traffic only and did not provide any QoS support for this kind of traffic.
The new amendment IEEE 802.11e standard was introduced and ratified in 2005. It defines the concept of
a Hybrid Co-ordination Function (HCF) at the MAC layer for medium access control. HCF is a
combination of HCF Controlled Channel Access (HCCA) with parameterized quality of service (QoS)
and Enhanced Distribution Channel Access (EDCA) with prioritized QoS. Enhanced Distribution
Channel Access (EDCA) is an enhanced version of Distributed Coordination Function )DCF( mechanism
used in the original IEEE 802.11 WLAN. This paper analyze the performance of the EDCA in an
industrial automation network with real-time requirements by means of a simulation with the network
simulator OPNET 11.5 and compares the results with the DCF in terms of latency and throughput in
various scenarios.
المقاييس
تفاصيل المقالة
هذا العمل مرخص بموجب Creative Commons Attribution 4.0 International License.
THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE http://creativecommons.org/licenses/by/4.0/
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