VTP-CSMA: A virtual token passing approach for real-time communication in IEEE 802.11 wireless networks

• Type: Article in International Scientific Journal
• Date: 2007

Authors

moraes, r (Author) Other; vasques, f (Author) FEUP; portugal, p (Author) FEUP; fonseca, ja (Author) Other

Journal

Title: IEEE Transactions on Industrial Informatics

Vol. 3 No. 3

Pages: 215-224

ISSN: 1551-3203

Publisher: IEEE

Indexing

ISI Web of Knowledge - 42 Citations

ISI Web of Science

Scopus - 49 Citations

Other information

Authenticus ID: P-004-8EY

DOI: 10.1109/TII.2007.903224

Abstract (EN): Currently, there is a trend towards the implementation of industrial communication systems using wireless networks. However, keeping up with the timing constraints of real-time traffic in wireless environments is a hard task. The main reason is that real-time devices must share the same communication medium with timing unconstrained devices. The VTP-CSMA architecture has been proposed to deal with this problem. It considers an unified wireless system in one frequency band, where the communication bandwidth is shared by real-time and non-real-time communicating devices. The proposed architecture is based on a virtual token passing (VTP) procedure that circulates a virtual token among real-time devices. This virtual token is complemented by an underlying traffic separation mechanism that prioritizes the real-time traffic over the non-real-time traffic. This is one of the most innovative aspects of the proposed architecture, as most part of real-time communication approaches are not able to handle timing unconstrained traffic sharing the same communication medium. A ring management procedure for the VTP-CSMA architecture is also proposed, allowing real-time stations to adequately join/leave the virtual ring.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10