GloMoSim: a library for parallel simulation of large-scale wireless networks
PADS '98 Proceedings of the twelfth workshop on Parallel and distributed simulation
Experimental evaluation of wireless simulation assumptions
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Sniffing Out the Correct Physical Layer Capture Model in 802.11b
ICNP '04 Proceedings of the 12th IEEE International Conference on Network Protocols
Architecture and evaluation of an unplanned 802.11b mesh network
Proceedings of the 11th annual international conference on Mobile computing and networking
Analyzing the MAC-level behavior of wireless networks in the wild
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
QuRiNet: quail ridge natural reserve wireless mesh network
WiNTECH '06 Proceedings of the 1st international workshop on Wireless network testbeds, experimental evaluation & characterization
Joint MAC-aware routing and load balancing in mesh networks
CoNEXT '07 Proceedings of the 2007 ACM CoNEXT conference
Many-to-One Throughput Capacity of IEEE 802.11 Multihop Wireless Networks
IEEE Transactions on Mobile Computing
Performance of VoIP over Multiple Co-Located IEEE 802.11 Wireless LANs
IEEE Transactions on Mobile Computing
Experimental anatomy of packet losses in wireless Mesh networks
SECON'09 Proceedings of the 6th Annual IEEE communications society conference on Sensor, Mesh and Ad Hoc Communications and Networks
The spaces between us: setting and maintaining boundaries in wireless spectrum access
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Experiences from the design, deployment, and usage of the UCSB MeshNet testbed
IEEE Wireless Communications
A high-performance MIMO OFDM wireless LAN
IEEE Communications Magazine
Research challenges towards the Future Internet
Computer Communications
Towards trustworthy simulation of wireless MAC/PHY layers: a comparison framework
Proceedings of the 15th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
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Simulators can provide full control when simulating wireless network behaviors, but are often plagued by their insufficiencies in reflecting real-world scenarios. Although previous works point out such a shortage is mainly due to the limitations of radio propagation models in simulators, it is unclear how imperfect modeling affects network behaviors and to what degree. In this study, we investigate differences between simulations and testbed experiments in wireless mesh networks. We compare and analyze the experimental results with NS-2 and QualNet simulations. We find that in the PHY layer, antenna diversity can cause differences in distribution of received signal strength between experiments and simulations. The discrepancy in some cases, however, can be compensated by tweaking path loss, a dominating factor in channel modeling. In the MAC layer, a significant performance degradation is observed in experiments when loaded with heavy traffic, but this is less obvious in simulations. The mismatching is further deteriorated by inadequate interference modeling. As transceiver sensitivity differs, resulting in dramatic unfairness at flow-level goodputs, simulators are immune from such a problem. In the IP layer, route prevalence and persistence are carefully examined. A few routes are found to dominate experimental testbed while routes are spread more evenly and are less stable in simulators. These findings give the wireless research community an improved picture of the differences between simulations and testbed experiments.