Wireless Sensor Networks (WSNs) have gained wide-scale popularity for real-time events monitoring and detection due to their high accuracy and ease of deployment. Therefore, they have become increasingly prevalent solutions in several application domains such as health-care, transportation, etc. Many studies in the literature have focused on optimizing the energy consumption of the wireless sensors in order to ensure their autonomous operation for longer periods. Some applications of WSNs, however, have strict delay requirements due to the nature of the information being transmitted. This delay should be kept as short as possible to ensure timely and efficient reaction of the system, such as a Traffic Management System (TMS) dealing with an incident on the road. In this context, we propose in this work, two novel schemes to reduce the transmission delay of prioritized messages in WSNs deployed in road networks to report regular traffic as well as event-driven (i.e. incidents) information. These schemes improve the backoff computation mechanism at the MAC layer of IEEE 802.15.4 standard protocol, by providing an original dual mode operation mechanism which speeds up the transmission of event-driven messages, while keeping the transmission delay of periodic messages reasonably low. Simulation results show that our schemes succeed in reducing the transmission delay of event-driven messages and achieve a very high packets delivery ratio.
|Title of host publication
|2014 International Conference on Connected Vehicles and Expo, ICCVE 2014 - Proceedings
|Institute of Electrical and Electronics Engineers Inc.
|Number of pages
|Published - 15 Oct 2015
|3rd International Conference on Connected Vehicles and Expo - Vienna, Austria
Duration: 3 Nov 2014 → 7 Nov 2014
Conference number: 3
|International Conference on Connected Vehicles and Expo, ICCVE Proceedings
|3rd International Conference on Connected Vehicles and Expo
|3/11/14 → 7/11/14