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On the ability of IEEE 802.11p and STDMA to provide predictable channel access

Katrin Bilstrup (Institutionen för signaler och system, Kommunikationssystem) ; Elisabeth Uhlemann ; Erik G. Ström (Institutionen för signaler och system, Kommunikationssystem) ; Urban Bilstrup
16th World Congress on Intelligent Transport Systems and Services, ITS 2009; Stockholm; Sweden; 21 September 2009 through 25 September 2009 (2009)
[Konferensbidrag, refereegranskat]

Emerging traffic safety applications requiring low delay communications will need vehicle ad-hoc networks. The only communication standard currently supporting this is IEEE 802.11p. However, 802.11p uses the medium access method CSMA/CA, which has a major drawback: unbounded worst case channel access delay. We therefore propose an algorithm already in commercial use in the shipping industry: STDMA. With STDMA, nodes always get predictable channel access regardless of the number of competing nodes and the maximum delay is deterministic. In this paper we elaborated with different parameter settings for the two protocols with the aim of improving performance without altering the standards.

Nyckelord: IEEE 802.11p, MAC, V2V, vehicular communications, STDMA



Denna post skapades 2010-01-07. Senast ändrad 2016-05-17.
CPL Pubid: 105730