Hybrid Wireless Mesh Networks (WMN) can be
quickly deployed at disasters sites to provide high-capacity wireless communications. As with other
WMN networks, a routing protocol is required to find
a path between non-neighboring source and destination nodes.
The routing metric used by the routing
protocol can have a significant impact on the performance of the network.
Most of the existing routing
metrics for multi-radio, multi-hop WMNs are calculated using external
information (such as link quality statistics and channel information). In a network
with highly mobile nodes, such as an Hybrid WMN,
the required frequent exchange of this information can
be very expensive, resulting in degraded performance.
In this paper, we present the ALARM routing metric, which is computed using the number of packets
queued per wireless interface. This computed value
offers an accurate representation of the traffic load,
link quality, interference and noise levels. As only this
one value need be exchanged to compute ALARM,
the overhead associated with the metric is less than
existing approaches. With the help of extensive simulations, we show that ALARM outperforms well-know
routing metrics like ETT and WCETT under varying
mobility and traffic load conditions in HybridWMNs.
Validation of these simulation results is obtained from
a small-scale testbed deployment. |
| Cite as: Pirzada, A., Wishart, R., Portmann, M. and Indulska, J. (2009). Asad Pirzada, Ryan Wishart, Marius Portmann and Jadwiga Indulska. In Proc. Thirty-Second Australasian Computer Science Conference (ACSC 2009), Wellington, New Zealand. CRPIT, 91. Mans, B., Ed. ACS. 25-34. |
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