Network Emulation in the Vint/NS Simulator
ISCC '99 Proceedings of the The Fourth IEEE Symposium on Computers and Communications
Architecture and evaluation of an unplanned 802.11b mesh network
Proceedings of the 11th annual international conference on Mobile computing and networking
FloorNet: deployment and evaluation of a multihop wireless 802.11 testbed
EURASIP Journal on Wireless Communications and Networking - Special issue on simulators and experimental testbeds design and development for wireless networks
MASS '11 Proceedings of the 2011 IEEE Eighth International Conference on Mobile Ad-Hoc and Sensor Systems
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Rapid prototyping of wireless network protocols is a recurring problem faced by experimental researchers. This feature is one of the biggest assets of the ns-3 emulation functionality. This paper provides the experimental evaluation of a novel distributed backpressure routing protocol implemented in ns-3 simulator exploiting the ns-3 emulation framework in a 12-node WiFi mesh network testbed. In this case in particular, the management of data queues present both in the ns-3 at application space and real WiFi cards at kernel space is a key issue for the correct operation of the routing protocol in the testbed. We introduce a mechanism based on Netlink sockets and the /sys subsystem to schedule the interaction and share information between data queues in ns-3 at user space and kernel space. A set of experiments characterizing the testbed and comparing results with the ns-3 simulator show that the ns-3 emulation framework augmented with the use of Netlink sockets and the /sys subsystem communication methods do not introduce performance degradation in terms of throughput. In addition, extensive evaluation results demonstrate the correct operation of the backpressure routing protocol in the WiFi mesh testbed, indicating the convenience of using ns-3 for the evaluation of wireless network protocols for both simulation and experimental methodologies.