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Performance Modeling of 802.11 Ad Hoc Networks with Time-Varying Carrier Sense Range and Physical Capture Capability

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2 Author(s)
Jin Sheng ; Dept. of Electr. Comput. & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY ; Vastola, K.S.

In a slow fading environment, the carrier sense range is not constant, so there is not a constant set of hidden terminals for a mobile station. The probability of capture with a set of interferers is not a fixed value either, and it fundamentally affects the loss rate and throughput of the whole network. We estimate the expectation of the capture probability in a single hop ad hoc network and incorporate it with our previously proposed model for 802.11 DCF that considers the time-varying nature of carrier sensing. The system throughput is then derived from an individual station's point of view. The model is verified against simulations, and extensive numerical experiments are performed to demonstrate its application.

Published in:

Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE

Date of Conference:

Nov. 30 2008-Dec. 4 2008

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