Quality of Service Routing in Wireless Mesh Networks



Wireless Mesh Networks and their current capabilities to maintain Quality of Service
(Qos) levels in a network through the use of Quality of Service Routing is a problematic area.
While such networks are becoming inexpensive, new ways to provide traffic differentiation
are needed, as it is expected that their main use will be for multimedia content, very
demanding on network resources. This demand is already causing trouble to wired networks
which have more bandwidth resources than shared medium wireless networks, being hard to
provide in effective ways differentiation between best-effort and traffic with QoS constraints,
while maximizing network utilization.

This thesis proposes a new interference-aware metric for Wireless Mesh Networks
routing protocols, the Class-Based Metric Interference Aware (CBM-IA), which supports
QoS through class differentiation. Furthermore, it makes use of multiple interfaced devices
and ISO Layer-2 interference information by means of cross-layering techniques.

An extensive comparison of existing metrics is performed, by means of simulation.
The results are compared to the main proposal of this work, the CBM-IA metric, showing not
only that the CBM-IA metric achieves its purpose of differentiating classes of traffic but also
improves the existing metrics in dense scenarios.


QoS routing

MSc Thesis

Quality of Service Routing in Wireless Mesh Networks, July 2008

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