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Abstract
In the context of wireless network simulation, many simulators are capable of evaluating the performance of single-channel network protocols, but they need many modifications to be able to simulate multi-radio multi-channel networks. We address the problem of simulating channel assignment protocols for multi-radio wireless mesh networks in ns-3 simulator, providing the essential steps needed to simulate a channel assignment protocol. In addition, we explain the details of simulating the Semi-dynamic Interference aware Channel Assignment (SICA) protocol as an example. We use SICA as a reference to address the challenges of validating and verifying the simulation model. To validate the channel assignment model in SICA, we use mathematical validation based on Markov chains. Furthermore, we propose a novel automated test module to verify the simulation process.
Highlights
Wireless mesh networks (WMN) will be the selfconfiguring backhaul providing Internet access for last mile users through multi-hop forwarding (Figure 1)
We provide the essential steps toward simulating channel assignment protocols in ns-3 simulator in this paper, including the validation of the game model used in Semi-dynamic Interference aware Channel Assignment (SICA) with a Markov model
7 Conclusions In this paper, we have presented the extensions which must be done in ns-3 simulator to simulate channel assignment mechanisms for multi-radio wireless networks
Summary
Wireless mesh networks (WMN) will be the selfconfiguring backhaul providing Internet access for last mile users through multi-hop forwarding (Figure 1). Wireless nodes which use hybrid CAs may not share a common channel with their neighbors, since the dynamic radio switches to the channel of the neighboring nodes to make the connection. Ns-3 [30] is a young simulator which allows the wireless mesh nodes to be equipped with more than one radio interface and makes it possible to change the frequency of the radio during the simulation run time Those features are necessary in order to simulate a multi-radio multi-channel network, they are not enough for simulating hybrid or dynamic CA mechanisms. Multi-radio mesh networks simulated in ns-3 based on the recently published standard, IEEE 802.11s [2], are assumed to share common channels.
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