Authors:
Sajid M. Sheikh
;
Riaan Wolhuter
and
G. J. van Rooyen
Affiliation:
University of Stellenbosch, South Africa
Keyword(s):
DiffServ, EDCA, Fairness, IntServ, MAC, QoS, Routing, Smart Grid, Wireless Mesh Networks.
Related
Ontology
Subjects/Areas/Topics:
Hybrid Wireless Communication Systems
;
Mobile Ad Hoc Networks and Multi-Hop Wireless
;
Sensor, Mesh and Ad Hoc Communications and Networks
;
Telecommunications
;
Wireless Information Networks and Systems
Abstract:
The contention based carrier sense multiple access with collision avoidance (CSMA/CA) was originally
designed for single-hop networks. For CSMA/CA to be used in multi-hop distributed networks and to
provide guaranteed data priority, the CSMA/CA needs to be optimised. An application is the smart grid
consisting of different network domains with data of different priority levels. The IEEE802.11e standard
was developed to provide differentiated data services. With the default enhanced distributed channel access
(EDCA) settings for QoS, an unfairness problem exists for different data classes where higher priority data
can starve lower priority data and also where bandwidth is allocated unfairly. In this paper, we carry out an
investigation of six design schemes for wireless backbone networks for QoS provisioning of different data
priority classes. The design schemes are based on the concept of low-cost design for suitability in rural areas
where cost plays a major role. The simulation re
sults were obtained using OMNET++ and the INET
framework. The performance metrics used for the analysis were end-to-end latency, packet loss percentage
and Jain’s fairness index. Simulation results show that hybrid network designs using distributed
coordination function (DCF) and EDCA can improve QoS in terms of reliability and fairness.
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