To cite this version:Najet Boughanmi, Ye-Qiong Song. A New routing metric for satisfying both energy and delay constraints in wireless sensor networks. 2nd International Conference on Sensor Networks and Applications (SNA06), Oct 2006, Beijing, China. inria-00105886
A NEW ROUTING METRIC FOR SATISFYING BOTH ENERGY AND DELAY CONSTRAINTS IN WIRELESS SENSOR NETWORKS
Wireless Networked Control Systems (WNCSs) require a special attention on communication protocols used to exchange time-constrained messages. The native IEEE 802.15.4 standard does not implement mechanisms capable to control the service offered by network. This paper proposes a solution enabling to prioritize the messages based on the blackburst mechanism. An analytic study on worst-case response time is presented to evaluate the performance of this new mechanism. Moreover, an online adaptation of the quality of control (QoC) is presented. These mechanisms are implemented and added to TrueTime and validated through simulations.
In this paper, the use of wireless sensor networks for networked control loop is analyzed. As the non beacon-enabled mode of IEEE 802.15.4/ZigBee does not ensure the stability for the control loop since non mechanism can prevent the perturbation coming from other applications sharing the same network, the quality of control has to be guaranteed for the control loop. Several possible solutions are investigated. The first one is the CSMA/CA with probabilistic priority by adjusting the minimum waiting time. The second one consists on a deterministic priority black burst mechanism in IEEE 802.15.4/ZigBee. The third one is the beacon-enabled mode using the Guaranteed Time Slot (GTS) mechanism.
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