An Enhanced Reservation-Based MAC Protocol for IEEE 802.15.4 NetworksReport as inadecuate




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1

Department of Industrial Electronics, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal

2

IPC-I3N, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal





*

Author to whom correspondence should be addressed.



Abstract The IEEE 802.15.4 Medium Access Control MAC protocol is an enabling standard for wireless sensor networks. In order to support applications requiring dedicated bandwidth or bounded delay, it provides a reservation-based scheme named Guaranteed Time Slot GTS. However, the GTS scheme presents some drawbacks, such as inefficient bandwidth utilization and support to a maximum of only seven devices. This paper presents eLPRT enhanced Low Power Real Time, a new reservation-based MAC protocol that introduces several performance enhancing features in comparison to the GTS scheme. This MAC protocol builds on top of LPRT Low Power Real Time and includes various mechanisms designed to increase data transmission reliability against channel errors, improve bandwidth utilization and increase the number of supported devices. A motion capture system based on inertial and magnetic sensors has been used to validate the protocol. The effectiveness of the performance enhancements introduced by each of the new features is demonstrated through the provision of both simulation and experimental results. View Full-Text

Keywords: wireless sensor networks; medium access control; quality of service wireless sensor networks; medium access control; quality of service





Author: José A. Afonso 1,* , Helder D. Silva 1, Pedro Macedo 1 and Luis A. Rocha 2

Source: http://mdpi.com/



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