The IEEE 802.15.4 standard is one of the main communication protocols proposed for wireless sensor networks, IoT 'Internet of Things' and WoT 'Web of Things'. This protocol provides a flexible MAC layer designed to meet a variety of applications. Since WSN is application-specific, it's very difficult to provide a generic solution for all types of applications and topologies. In this work we focus on delay sensitive applications in star networks. This topology is used in wireless sensor networks for monitoring and control applications. The IEEE 802.15.4 standard provides some quality of service features for real-time data transmission. We identified some limitations of this standard and we proposed an improvement to provide a lower end-to-end delay with respect to energy consumption constraint by optimizing MAC layer. The experimentations are done using the NS-2 simulator. The results show the improvements expected by our approach among the IEEE 802.15.4 MAC standard.
General TermsQuality of service, wireless sensor network, IEEE 802.15.4, Medium Access Control
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.