Proceedings of the conference on Design, Automation and Test in Europe - Volume 1
Analysis of the contention access period of IEEE 802.15.4 MAC
ACM Transactions on Sensor Networks (TOSN)
Energy conservation in wireless sensor networks: A survey
Ad Hoc Networks
The impact of MAC parameters on the performance of 802.15.4 PAN
Ad Hoc Networks
Performance limitations of the MAC layer in 802.15.4 low rate WPAN
Computer Communications
Understanding the real behavior of Mote and 802.11 ad hoc networks: an experimental approach
Pervasive and Mobile Computing
Performance Analysis of Slotted Carrier Sense IEEE 802.15.4 Medium Access Layer
IEEE Transactions on Wireless Communications
Exploiting a meeting channel to interconnect mobile robots
Journal of Network and Computer Applications
| Hi-index | 0.00 |
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 appropriate parameter setting, it is possible to achieve the desired level of reliability (as well as a better energy efficiency). However, in some scenarios this is possible only by choosing parameter values formally not allowed by the standard.