Effects of carrier sense modeling on wireless network simulation results
Proceedings of the 14th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Impact of Wireless Channel Temporal Variation on MAC Design for Body Area Networks
ACM Transactions on Embedded Computing Systems (TECS) - Special Section on CAPA'09, Special Section on WHS'09, and Special Section VCPSS' 09
Efficient conditional-probability link modeling capturing temporal variations in body area networks
Proceedings of the 15th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
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A typical Body Area Network (BAN) involves multiple on-body sensors exchanging information with a central gateway, forming a star topology network. The characterization of sensor-to-gateway wireless links is clearly important in simulation, as indicated by substantial research efforts to collect experimental traces and model them. Sensor-to-sensor links on the other hand, have received less attention, due to the fact that there is no immediate communication between sensors and, at the same time, it is expensive to collect experimental traces for all node combinations. Nevertheless, these links affect communication when contention-based access protocols are considered, therefore creating a modeling need. In this paper we investigate models for sensor-to-sensor links, in simulation scenarios which employ two established communication standards, namely 802.15.4 and 802.15.6. These standards rely on a mix of CSMA and TDMA to enable wireless communication between sensors and the gateway. We show that sensor-to-sensor links are indeed important in simulation, and investigate the effect of different modeling approaches on application layer results and computational overhead. Moreover, we show the correspondence between two different modeling approaches and suggest the simpler one is sufficient to carry out simulation studies over a wide range of scenarios.