A new MAC scheme specifically suited for real-time industrial communication based on IEEE 802.11e

Authors:
Raimundo Viegas, Jr.;Luiz Affonso Guedes;Francisco Vasques;Paulo Portugal;Ricardo Moraes
Affiliations:
Federal University of Para, Faculty of Computer Science, Brazil;Federal University of Rio Grande do Norte, Department of Computer Engineering, Brazil;University of Porto, Faculty of Engineering, UISPA, Portugal;University of Porto, Faculty of Engineering, DEEC, Portugal;Federal University of Santa Catarina, Computer Engineering Department, Brazil
Venue:
Computers and Electrical Engineering
Year:
2013

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Abstract

This paper proposes a new real-time communication scheme for 802.11e wireless networks. This scheme is called Group Sequential Communication (GSC). The GSC improves the efficiency of the Hybrid Coordination Function Controlled Channel Access (HCCA) mechanism by reducing the protocol overheads of the 802.11e amendment. The GSC approach eliminates the polling scheme used in traditional scheduling algorithm, by means of a virtual token passing procedure among members of the real-time group to whom is granted a high-priority and sequential access to communication medium. In order to improve the reliability of the proposed scheme, it is also proposed an error recovery mechanism based on block acknowledgment. The GSC was implemented in network simulator software and the performance results were compared to HCCA scheme, showing the efficient of the proposed approach when dealing with traditional industrial communication scenarios.