Performance evaluation of TDMA versus CSMA-based protocols in SINR models

Konferenz: European Wireless 2009 - 15th European Wireless Conference
17.05.2009 - 20.05.2009 in Aalborg, Denmark

Tagungsband: European Wireless 2009

Seiten: 5Sprache: EnglischTyp: PDF

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Banaouas, Skander; Mühlethaler, Paul (INRIA Rocquencourt,, Le Chesnay, France)

In this paper, we compare Time Division and Carrier Sense Multiple Access schemes (TDMA and CSMA) in a Signal to Noise and Interference Ratio (SINR)-based model. We assume that the network nodes are distributed a Poisson process evenly distributed and have pending packets. First we study the distribution of the SINR in TDMA-based protocols where the same time-slot is reserved in given radius of n hops (n = 2 in most of these protocols). The same study is carried for CSMA-based access protocols where the reuse is controlled with the carrier-sense threshold. We then compare the total throughput of TDMA and CSMA based access protocols in an outage model. In this model a packet is considered as correctly received if its SINR is above a given threshold. Finally, we conduct the same comparison between TDMA and CSMA-based access protocols in a model of adaptive coding. In this model, the actual SINR rules the transmission coding. We idealize the performance of this technique using the Shannon’s well know formula W = W0log(1 + SIN R).