The MAC unreliability problem in IEEE 802.15.4 wireless sensor networks

In recent years, the number of sensor network deployments for real-life applications has rapidly increased and it is expected to expand even more in the near future. Actually, for a credible deployment in a real environment three properties need to be fulfilled, i.e., energy efficiency, scalability and reliability. In this paper we focus on IEEE 802.15.4 sensor networks and show that they can suffer from a serious MAC unreliability problem, also in an ideal environment where transmission errors never occur. This problem arises whenever power management is enabled – for improving the energy efficiency – and results in a very low delivery ratio, even when the number of nodes in the network is very low (e.g., 5). We carried out an extensive analysis, based on simulations and real measurements, to investigate the ultimate reasons of this problem. We found that it is caused by the default MAC parameter setting suggested by the 802.15.4 standard. We also found that, with a more appropri...

• Type: Conference
• Year: 2009
• Where: MSWIM
• Authors: Giuseppe Anastasi, Marco Conti, Mario Di Francesco
• Keywords: Energy Efficiency, IEEE 802.15.4 Sensor, Modelling And Simulation, MSWIM 2009, Sensor Networks