Real-time communication in 802.11 networks: The virtual token passing VTP-CSMA approach

• Type: Article in International Conference Proceedings Book
• Date: 2006

Authors

Ricardo Moraes (Author) Other; Francisco Vasques (Author) FEUP; Paulo Portugal (Author) FEUP; José Alberto Fonseca (Author) Other

Conference proceedings International

Title: 31st IEEE Conference on Local Computer Networks, Proceedings

Pages: 389-396

31st Annual IEEE Conference on Local Computer Networks

Tampa, FL, NOV 14-16, 2006

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

INSPEC

Scientific classification

CORDIS: Technological sciences > Engineering > Electrical engineering

Other information

Authenticus ID: P-004-R6Q

DOI: 10.1109/lcn.2006.322125

Abstract (EN): Currently there is a trend for the implementation of industrial communication systems on top of wireless communications. However, keeping up with the timing constraints of real-time traffic in open medium environments is a hard task. The main source for complexity is that, if the set of communicating devices is not previously agreed, the timing constraints imposed by such devices cannot be predicted at the system setup time, nor can be effectively controlled at the system run-time. In this paper, we propose the VTP-CSMA architecture to deal with this problem. This architecture allows the coexistence of default IEEE 802.11e devices with real-time devices sharing the same communication medium, enabling the prioritization of real-time traffic. The proposed solution is based on the control of the medium access rights by means of a Virtual Token Passing procedure (VTP), complemented by an underlying traffic separation mechanism that prioritizes realtime traffic over the traffic from default IEEE 802.11 stations. The simulation analysis shows that the VTP-CSMA architecture guarantees values for both the throughput and the average access delay that significantly improves the results obtained for default IEEE 802.11e stations operating under EDCA mode.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8